2011 Stormwater Annual Report - Boston Water and Sewer ...

TABLE OF CONTENTS1.0 INTRODUCTION1.1 Permit History…………………………………………….. ……………. 1-11.2 Annual Report Requirements………………………………………….. 1-11.3 Commission Jurisdiction and Legal Authority forDrainage System and Stormwater Management……………………… 1-11.4 Municipal Storm Drains Owned by Others…………………………… 1-21.5 Characterization of Separated Storm Drainage Areas….…………… 1-31.6 Mapping of Drainage Areas and Stormwater OutfallLocations…………………………………………………... ……………. 1-32.0 ILLEGAL CONNECTION REMEDIATION AND OUTFALL SCREENING2.1 Outfall Screening ……………………………………….……………….. 2-12.2 Illegal Connection Identification by Commission Staff……………….. 2-22.3 Illegal Connection Investigation Contracts…………………………….. 2-122.4 Drainage Area Investigations………………….…………..……………. 2-132.5 Investigation Methodology…………………………………………….... 2-132.6 Correction of Illegal Connections………………………………………. 2-182.7 2011 Illegal Connection Remediation Summary…..…………………… 2-183.0 STORMWATER MANAGEMENT ACTIVITIES3.1 Operation and Maintenance of Structural Controls.………………… 3-13.2 Control of Non-Stormwater Discharges to the Drainage System……. 3-73.3 Development and Construction Sites………………………………….. 3-173.4 Roadways……………………………………………………………….... 3-243.5 Flood Control Projects…………………………………………………. 3-263.6 Pesticide, Herbicide and Fertilizer Application………………………. 3-273.7 Public Education……………………………………………………….... 3-273.8 Support for Watershed and Environmental Agenciesand Organizations………………………………………………………. 3-294.0 REPRESENTATIVE AND RECEIVING WATER MONITORING. AND BMPDEMONSTRATION PROGRAMS4.1 Previously Completed Monitoring Programs...………………………. 4-14.2 2010 Stormwater Monitoring Program………….……………………. 4-1i.

TABLE OF CONTENTS (cont.)5.0 PROGRAM MODIFICATIONS5.1 Stormwater Management Program………………………………..……. 5-15.2 Outfall Screening..………………………………………………..……. 5-15.3 Illegal Connection Investigations and Remediation ………….……… 5-25.4 Stormwater Monitoring ………………………………………….……… 5-25.5 BMP Demonstration Programs…………………………………………. 5-35.6 Structural Controls………………………..………..…………………… 5-36.0 FINANCING STORMWATER MANAGEMENT6.1 Current Expense Budget……………………………………………….. 6-16.2 Capital Expenditures…………………………………………………… 6-27.0 ENFORCEMENT………………………………………………………………. 7-18.0 WATER QUALITY IMPROVEMENTS8.1 Illegal Connection Elimination………………………………………….. 8-18.2 Sewer, Drain, Catch Basin and Particle Separator Cleaning.………... 8-18.3 BMPs on Private Property…………………………………………... 8-19.0 ASSESSMENT OF STRUCTURAL CONTROLS9.1 Catch Basins…………………………………………………………….. 9-19.2 Particle Separators……………………………………………………… 9-2LIST OF TABLESTable 1-1 BWSC Stormwater Outfalls………………………………………………… 1-4Table 1-2 Drainage Areas to Outfalls Owned by Others……………………………… 1-7Table 2-1 2010 Outfall Screening Results – Visit 1…………………………………….. 2-6Table 2-2 2010 Outfall Screening Results – Visit 2…………………………………….. 2-8Table 2-3 2010 Outfall Screening – Results of Water Quality Sampling …………….. 2-9Table 2-4 Drainage Area Investigation Status 2011………………………………….. 2-14Table 2-5 Illegal Connections Outstanding as of Jan 1, 2011………..………………. 2-21Table 2-6 Illegal Connections Identified in 2011…………….…………….…………. 2-22Table 2-7 Illegal Connections Corrected in 2011……………………...……………… 2-24Table 2-8 Illegal Connections Outstanding on December 31, 2011…...……………… 2-26ii.

LIST OF TABLES (cont.)Table 3-1 Brook Inlet and Outlet Cleaning…………………………………………… 3-3Table 3-2 BWSC Particle Separators 2011……………………………………………. 3-5Table 3-3 Spill/Dumping Response 2011……………………………………...……….. 3-9Table 3-4 Private Infiltration Devices Installed 2011……………………….………. 3-19Table 3-5 Privately Installed Particle Separators 2011………………………..……. 3-22Table 9-1 BWSC Particle Separator Cleaning-Material Removed 2001-2011……… 9-3LIST OF FIGURESFigure 1-1 Storm Drain Outfalls, Tributary Areas and Status ofInvestigations….…………………………………………………………….. End Sec. 1Figure 2-1 Outfall Field Screening Program – Initial Visual Inspection…....……….. 2-3Figure 2-2 Outfall Field Screening Program – Screening and Sampling ………..….. 2-4iii.

1.0 INTRODUCTION1.1 PERMIT HISTORYDischarges to the Boston Water and Sewer Commission’s (Commission) separate stormdrainage system are regulated under the U.S. Environmental Protection Agency’s (EPA)National Pollutant Discharge Elimination System (NPDES) Stormwater PermitRegulations. The Commission’s NPDES Stormwater Permit (MAS010001) was issuedby the EPA and the Massachusetts Department of Environmental Protection (DEP) onSeptember 29, 1999, and became effective on October 29, 1999. The five year permitexpired on October 29, 2004. The Commission’s 2003 Stormwater Management Report,which was submitted to the EPA on February 27, 2004, constituted the Commission’sreapplication for an NPDES Stormwater Permit.1.2 ANNUAL REPORT REQUIREMENTSUnder the Permit, the Commission is required to develop and implement stormwaterpollution prevention and management programs that are designed to reduce, to themaximum extent practicable, the discharge of pollutants to the municipal storm drainagesystem. In accordance with the NPDES Stormwater Permit (the Permit), the Commissionis required to report annually to the EPA and the DEP regarding the status of its pollutionprevention and stormwater management programs. This report provides a summary ofthe stormwater activities undertaken by the Commission in 2011. Provided herein aredescriptions of the Commission’s outfall screening, stormwater and receiving watermonitoring, and illegal connection remediation programs, discussions regardingmodifications to these programs, annual expenditures, water quality improvements and anassessment of structural controls.1.3 COMMISSION JURISDICTION AND LEGAL AUTHORITY FORDRAINAGE SYSTEM AND STORMWATER MANAGEMENTThe Commission was created pursuant to an act of the Massachusetts Legislature underChapter 436 of the Acts of 1977 as a political subdivision of the Commonwealth,separate and apart from the City of Boston. The enabling act charged the Commissionwith the responsibility for the operation and maintenance of the water distribution systemand the wastewater collection and stormwater drainage systems which serve the City ofBoston. Through its enabling legislation the Commission is empowered to promulgaterules and regulations in order to perform its statutory functions and duties. TheCommission’s Regulations Governing the Use of Sanitary and Combined Sewers andStorm Drains and Requirements for Site Plans are briefly described below. Copies of the

documents are available by contacting the Commission and a downloadable version isavailable from the Commission’s web site located at www.bwsc.org.Sewer Use Regulations: The majority of the Commission’s stormwater managementcontrols are enforced through its Regulations Governing the Use of Sanitary andCombined Sewers and Storm Drains (the Sewer Use Regulations). The Sewer UseRegulations were adopted in 1983 and amended in 1989. They were amended again in1998 to strengthen and clarify the requirements, particularly as they pertain to stormwaterdischarges. In 1998, the Commission also amended its Penalty Schedule by adding andincreasing the fines for several Sewer Use Regulation violations.General Service Applications and Requirements for Site Plans: The Commissionrequires that a General Service Application and a site plan be submitted for every new orreconstructed water, sewer, or storm drain service connection. The Requirements for SitePlans are to assist developers, builders, architects, engineers, and others in preparing siteplans that conform to the Commission’s requirements and to help them secure thenecessary approvals from the Commission.The site plan must be approved by the Commission’s Chief Engineer before constructionmay begin, and it will not be approved unless it complies with the Commission’sRequirements for Site Plans and Sewer Use Regulations. The site plan review providesan opportunity to review the components of the project and condition the approval oncompliance with the Commission’s Sewer Use Regulations, Requirements for Site Plans,and other requirements. The Commission’s Requirements for Site Plans are updated asneeded, generally about once a year.1.4 MUNICIPAL STORM DRAINS OWNED BY OTHERSThe Commission controls most of the municipal storm drains in Boston. However, somestorm drains and outfalls are owned by other city agencies. For example, drains andoutfalls located in the Marine Industrial Park in South Boston are owned and operatedjointly by the Economic Development and Industrial Corporation of Boston and theBoston Redevelopment Authority (EDIC/BRA); the Boston Parks Department ownsdrains in Franklin Park and Boston Common, and in other city parks.Other storm drains and outfalls in the city are owned by state agencies, such as theMassachusetts Department of Transportation, Massport, and the state Department ofConservation and Recreation; these drains and outfalls are not controlled by theCommission.The Commission also has a number of interconnections with the Town of Brookline,Town of Dedham, Town of Milton and City of Newton, over which it has no control oftheir respective upstream systems. The Commission does not have jurisdiction or controlover these separately owned facilities, nor does it have jurisdiction and/or control over1- 2

oadways, roadway maintenance, construction site inspection, parks or city or statefacilities which may impact the Commission’s separate storm system.1.5 CHARACTERIZATION OF SEPARATED STORM DRAINAGE AREASDue to the completion of sewer separation projects two new outfalls, 26J049 and 26K050in Boston Proper have been added to the Commission’s drainage system. Outfall 18L087in Dorchester was eliminated in 2011, and it was removed from the list. Flows thatpreviously discharged at that outfall were redirected under the Massachusetts WaterResources Authority’s North Dorchester Bay CSO Storage Tunnel (NDBST) Project.One Commission outfall was inadvertently left off the list on last year’s report. In totalthere are currently 208 storm drain outfalls in the Commission’s drainage system. Ofthose, 101 are classified as major outfalls, and 107 are classified as non-major outfalls.Table 1 – 1 is a list of the Commission’s outfalls.Table 1 – 2 lists areas with Commission owned storm drainage systems that do notdischarge to an outfall, rather they discharge through a manhole to storm drains owned byothers. Four new manholes have been identified and added to the list since last year.Currently the amount of area in Boston served by separated storm drains is 17,554 acres,or approximately 57 percent of Boston. The remainder of the area is served bycombined sewers, sanitary sewers only, or is open space with no sewers or drains.1.6 MAPPING OF DRAINAGE AREAS AND STORMWATER OUTFALLLOCATIONSThe map (Figure 1) at the end of this section shows the locations of the Commission’sstorm drain outfalls and their tributary areas.1- 3

Table 1-1 BWSC Stormwater OutfallsOUTFALL NUMBER LOCATION NEIGHBORHOODSIZE(INCHES)RECEIVING WATER08J102 NON MAJOR ADAMS STREET DORCHESTER 15X15 NEPONSET RIVER08J103 NON MAJOR EASEMENT/CENTRAL AVE BRIDGE DORCHESTER 30 NEPONSET RIVER08J49/50 MAJOR DESMOND RD DORCHESTER 2-18&24 NEPONSET RIVER08K049 NON MAJOR BEARSE AVENUE DORCHESTER 12 NEPONSET RIVER09B049 MAJOR EASEMENT/RIVERMOOR ST WEST ROXBURY 30 COW ISLAND POND/CHARLES RIVER09E229 NON MAJOR GRANDVIEW STREET WEST ROXBURY 12 NONE SHOWN09E243 NON MAJOR BLUE LEDGE TR/EASEMENT WEST ROXBURY 30 UNNAMED STREAM09K016 NON MAJOR EASEMENT/BEARSE AVE EXT DORCHESTER 15 NEPONSET RIVER09K100 MAJOR EASEMENT/MELLISH RD DORCHESTER 34X24 NEPONSET RIVER09K101 NON MAJOR EASEMENT/HUNTOON ST EXT DORCHESTER 24 NEPONSET RIVER09L095 MAJOR GRANITE AVENUE DORCHESTER 36X48 NEPONSET RIVER10B015 MAJOR EASEMENT/CHARLES RIVER ROAD WEST ROXBURY 21 COW ISLAND POND/CHARLES RIVER10L094 MAJOR EASEMENT/GALLIVAN BLVD DORCHESTER 74X93 NEPONSET RIVER VIA DAVENPORT BROOK10L096 MAJOR HILLTOP & LEXONDALE STS DORCHESTER 36 NEPONSET RIVER11B123 MAJOR EASEMENT/EAST OF BAKER ST EXT. WEST ROXBURY 72 BROOK FARM BROOK/CHARLES RIVER11G318 NON MAJOR CULVERT UNDER WALK HILL STREET ROSLINDALE 24 CANTERBURY BROOK11G319 NON MAJOR CULVERT UNDER WALK HILL STREET ROSLINDALE 18 CANTERBURY BROOK11I577 MAJOR HARVARD ST NEPONSET/MATTAPAN 102X102 CANTERBURY BROOK11M093 MAJOR NEPONSET AVE AT NW END OF NEPONSET AVE BRIDGE DORCHESTER 48 NEPONSET RIVER12B010 NON MAJOR BAKER STREET WEST ROXBURY 15 BROOK FARM BROOK12B014 NON MAJOR BAKER STREET WEST ROXBURY 12 BROOK FARM BROOK12B031 NON MAJOR EASEMENT/BAKER STREET WEST ROXBURY 18 BROOK FARM BROOK12B033 NON MAJOR EASEMENT/BAKER STREET WEST ROXBURY 18 BROOK FARM BROOK12B124 MAJOR EASEMENT/LAGRANGE STREET WEST ROXBURY 120 BROOK FARM BROOK12F305 NON MAJOR EASEMENT/ARBOROUGH ROAD ROSLINDALE 12 UNAMED WETLANDS12E418 NON MAJOR EASEMENT/WALTER STREET (renumbered from 12F322) ROSLINDALE 18 NONE SHOWN12H085 NON MAJOR MORTON STREET ROSLINDALE 15 CANTERBURY BROOK12H087 NON MAJOR MORTON STREET ROSLINDALE 15 CANTERBURY BROOK12H092 MAJOR AMERICAN LEGION HIGHWAY WEST ROXBURY 24 CANTERBURY BROOK12L092 MAJOR PINE NECK CREEK/TENEAN ST WEST OF LAWLEY DORCHESTER 72 NEPONSET RIVER12L296 MAJOR CONLEY STREET DORCHESTER 42 NEPONSET RIVER/DORCHESTER BAY12M091 MAJOR ERICSSON/WALNUT ST NEPONSET/MATTAPAN 36 NEPONSET RIVER13B011 NON MAJOR LAGRANGE STREET WEST ROXBURY 12 UNNAMED STREAM13D077/078 MAJOR WEST ROXBURY PKY/VFW PKY WEST ROXBURY 2-60 BUSSEY BROOK13E174 NON MAJOR EASEMENT/VFW PARKWAY ROSLINDALE 24 BUSSEY BROOK13E175 MAJOR EASEMENT/VFW PKY ROSLINDALE 108X86 BUSSEY BROOK13E176 NON MAJOR EASEMENT/WELD ST ROSLINDALE 15 NONE SHOWN13F011 NON MAJOR ALLANDALE STREET ROSLINDALE 24 BUSSEY BROOK13F093 (13F012) NON MAJOR WALTER STREET ROSLINDALE 15 BUSSEY BROOK13F095 NON MAJOR EASEMENT/BUSSEY STREET ROSLINDALE 12 BUSSEY BROOK13L090 MAJOR VICTORY RD. 200 FT SOUTH DORCHESTER 144X180 DORCHESTER BAY14C009 MAJOR EASEMENT/WESTGATE RD WEST ROXBURY 36 UNNAMED WETLANDS15F288 MAJOR ARNOLD ARBORETUM/MURRAY CIRCLE JAMAICA PLAIN 54 GOLDSMITH BROOK15L088 MAJOR FREEPORT WAY EXTENDED DORCHESTER 2-78" DORCHESTER BAY15L089 MAJOR FOX POINT RD EXTENDED DORCHESTER 2-90X82" DORCHESTER BAY16L097 NON MAJOR EASEMENT/OFF SAVIN HILL AVE DORCHESTER 24 PATTEN'S COVE16L122 MAJOR MORRISSEY BLVD DRAIN DORCHESTER TWIN 9X8 DORCHESTER BAY17F012 NON MAJOR FRANCIS PARKMAN DRIVE JAMAICA PLAIN 15 JAMAICA POND17M033 MAJOR HARBOR POINT PARK (RELOCATED MT VERNON ST DRAIN) DORCHESTER 72 OLD HARBOR18G233 NON MAJOR X-COUNTRY BTN WILLOW POND RD AND JAMAICAWAY JAMAICA PLAIN 18 MUDDY RIVER-LEVERETT POND19G043 MAJOR HUNTINGTON AVE ROXBURY/MISSION HILL 45X45 MUDDY RIVER19G194 MAJOR SOUTH HUNTINGTON AVE ROXBURY/MISSION HILL 24 MUDDY RIVER19G199 NON MAJOR JAMAICA WAY ROXBURY/MISSION HILL 10 MUDDY RIVER20G161 MAJOR EASEMENT/BROOKLINE AVE ROXBURY/MISSION HILL 36 MUDDY RIVER20G163 NON MAJOR EASEMENT/RIVERWAY ROXBURY/MISSION HILL 20 MUDDY RIVER20L081 NON MAJOR EAST FIRST STREET SOUTH BOSTON 20 RESERVED CHANNEL20L083 NON MAJOR EAST FIRST STREET SOUTH BOSTON 20 RESERVED CHANNEL21C212 NON MAJOR EASEMENT/LAKE SHORE ROAD ALLSTON/BRIGHTON 30 CHANDLER POND21H039 (21H045) NON MAJOR FENWAY BOSTON PROPER 30X30 MUDDY RIVER21H047 NON MAJOR PALACE ROAD EXT BOSTON PROPER 24 MUDDY RIVER21H048 NON MAJOR EASEMENT/FENWAY/EVANS WAY BOSTON PROPER 15 MUDDY RIVER21H201 NON MAJOR PALACE ROAD EXT BOSTON PROPER 6 MUDDY RIVER21K069 MAJOR 125' NORTH OF W.FOURTH STREET (RELOCATED BY CA/T) BOSTON PROPER 48 FORT POINT CHANNEL21M005 NON MAJOR SUMMER STREET SOUTH BOSTON 18 RESERVED CHANNEL21M010 MAJOR D STREET EXTENDED SOUTH BOSTON 30 RESERVED CHANNEL21M050 MAJOR SUMMER STREET SOUTH BOSTON 72 RESERVED CHANNEL22C384 MAJOR EASEMENT/LAKE SHORE RD ALLSTON/BRIGHTON 36 CHANDLER POND22L580 MAJOR NECCO STREET EXTENDED SOUTH BOSTON 54 FORT POINT CHANNEL23G132 MAJOR EASEMENT/MASS TURNPIKE/WEST OF BU BRIDGE ALLSTON/BRIGHTON 60 CHARLES RIVER23H040 NON MAJOR RALEIGH STREET EXT BOSTON PROPER 24 CHARLES RIVER23H042 MAJOR DEERFIELD ST BOSTON PROPER 116X120 CHARLES RIVER1 - 5

Table 1-1 BWSC Stormwater OutfallsOUTFALL NUMBER LOCATION NEIGHBORHOODSIZE(INCHES)RECEIVING WATER23L015 NON MAJOR NORTHERN AVE SOUTH BOSTON 24 BOSTON INNER HARBOR23L016 NON MAJOR NORTHERN AVE SOUTH BOSTON 2-15&16 BOSTON INNER HARBOR23L074 NON MAJOR SUMMER ST BRIDGE SOUTH BOSTON 15 FORT POINT CHANNEL23L075 MAJOR CONGRESS ST BRIDGE SOUTH BOSTON 54 FORT POINT CHANNEL23L164 MAJOR CONGRESS ST BRIDGE BOSTON PROPER 48 FORT POINT CHANNEL23L195 MAJOR NORTHERN AVE SOUTH BOSTON 36 BOSTON INNER HARBOR23L196 MAJOR NEW NORTHERN AVE BRIDGE SOUTH BOSTON 36 FORT POINT CHANNEL23L202 MAJOR NORTHERN AVE SOUTH BOSTON 36 BOSTON INNER HARBOR24C174 NON MAJOR EASEMENT/NEWTON STREET ALLSTON/BRIGHTON 24 CHARLES RIVER24D032 MAJOR N OF BEACON ST, ABOUT 800' E OF PARSONS ST ALLSTON/BRIGHTON 119X130 CHARLES RIVER24D150 MAJOR SOLDIERS FIELD PLACE ALLSTON/BRIGHTON 36 CHARLES RIVER24G034 MAJOR SOLDIERS FIELD ROAD, S OF CAMBRDIGE ST ALLSTON/BRIGHTON 36 CHARLES RIVER24G035 MAJOR SOLDIERS FIELD ROAD/BABCOCK ST ALLSTON/BRIGHTON 90X84 CHARLES RIVER24L057 NON MAJOR STATE STREET EXT BOSTON PROPER 18X18 BOSTON INNER HARBOR24L233 MAJOR ROWE'S WHARF/ATLANTIC AVE BOSTON PROPER 42 BOSTON HARBOR25D040 MAJOR ABOUT 390' N OF INTERSECTION OF SOLDIERS FIELD RD & WESTERN AVE ALLSTON/BRIGHTON 36 CHARLES RIVER25E037 MAJOR EASEMENT/TELFORD ST ALLSTON/BRIGHTON 66 CHARLES RIVER25G006 NON MAJOR FROM WESTERN AVE BRIDGE ALLSTON/BRIGHTON 12 CHARLES RIVER25G041 NON MAJOR SOLDIERS FIELD RD/NORTH OF WESTERN AVE BRIDGE ALLSTON/BRIGHTON 24 CHARLES RIVER25L058 MAJOR CHRISTOPHER COLUMBUS PARK-WATERFRONT BOSTON PROPER 84 BOSTON INNER HARBOR25L144 NON MAJOR CLARK STREET BOSTON PROPER 12 BOSTON INNER HARBOR25M006 MAJOR MARGINAL ST EXT EAST BOSTON 36 BOSTON INNER HARBOR25M007 MAJOR MARGINAL ST EXT (NEAR ORLEANS ST) EAST BOSTON 42 BOSTON INNER HARBOR26F038 MAJOR HARVARD ST EXT ALLSTON/BRIGHTON 36 CHARLES RIVER26G001 MAJOR SOLDIERS FIELD ROAD/EAST OF HARVARD UNIVERSITY ALLSTON/BRIGHTON 36 CHARLES RIVER26J049 MAJOR NASHUA STREET BOSTON PROPER 60 CHARLES RIVER26J052 NON MAJOR MONSIGNOR O'BRIEN HWY BOSTON PROPER 12 CHARLES RIVER26J101 (replaced 26J055) MAJOR LEVERETT CIRCLE BOSTON PROPER 36 BOSTON INNER HARBOR26K035 MAJOR BEVERLY STREET NEAR WARREN BRIDGE BOSTON PROPER 48x72 CHARLES RIVER26K050 MAJOR NASHUA STREET BOSTON PROPER 36 CHARLES RIVER26K052 NON MAJOR COMMERCIAL STREET AT CHARTER ST. BOSTON PROPER 16x24 CHARLES RIVER26K099 MAJOR WARREN ST EXT (FORMERLY CHELSEA ST/JOINER EXT) CHARLESTOWN 84 CHARLES RIVER26K245 NON MAJOR EASEMENT CHARLESTOWN 15 CHARLES RIVER26L055 MAJOR NEAR BATTERY WHARF BOSTON PROPER 24X24 BOSTON INNER HARBOR26L070 MAJOR HANOVER ST EXT BOSTON PROPER 36 BOSTON INNER HARBOR26L084 MAJOR LEWIS STREET EAST BOSTON 18 BOSTON INNER HARBOR27J001 MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN 72 MILLERS RIVER27J044 MAJOR PRISON POINT BRIDGE CHARLESTOWN 15 MILLERS RIVER27J096 MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN 54 MILLERS RIVER27L020/22 MAJOR PIER 4 EASEMENT - NAVY YARD CHARLESTOWN 2-20&24 BOSTON INNER HARBOR28K010 MAJOR OLD LANDING WAY EXT CHARLESTOWN 42 LITTLE MYSTIC CHANNEL28K061 MAJOR EASEMENT/MEDFORD ST/OLD IRONSIDE CHARLESTOWN 42 LITTLE MYSTIC CHANNEL28K386 MAJOR EASEMENT/TERMINAL ST CHARLESTOWN 30 LITTLE MYSTIC CHANNEL28L073 NON MAJOR EASEMENT/5TH AVE - NAVY YARD CHARLESTOWN 6 LITTLE MYSTIC CHANNEL28L074/075/076 MAJOR 16TH ST/5TH AVE - NAVY YARD CHARLESTOWN 3-30 LITTLE MYSTIC CHANNEL28L077 NON MAJOR EASEMENT/16TH ST - NAVY YARD CHARLESTOWN 10 LITTLE MYSTIC CHANNEL28N156 NON MAJOR COLERIDGE ST EXT EAST BOSTON 12 BOSTON HARBOR28N207 MAJOR MOORE ST EAST BOSTON 54X57 BOSTON HARBOR28O025 NON MAJOR COLERIDGE/WADSWORTH ST. EXT EAST BOSTON 30 BOSTON HARBOR28P001 NON MAJOR EASEMENT/NANCIA STREET EAST BOSTON 12 BOSTON HARBOR29J029 NON MAJOR ALFORD STREET/RYAN PLGD CHARLESTOWN 15 MYSTIC RIVER29J129 MAJOR ALFORD STREET SOUTH CHARLESTOWN 15 MYSTIC RIVER29J212 MAJOR EASEMENT/MEDFORD ST(NEXT TO CSO 017) CHARLESTOWN 72 MYSTIC RIVER29M049 MAJOR CONDOR STREET EAST BOSTON 48 CHELSEA RIVER29N015 MAJOR CHELSEA STREET EAST BOSTON 42X44.5 CHELSEA RIVER29N135 MAJOR ADDISON ST EAST BOSTON 30X30 CHELSEA RIVER29O001 MAJOR BENNINGTON ST (CONSTITUTION BEACH) EAST BOSTON 66 BOSTON HARBOR NEAR CONSTITUTION BEACH29P015 NON MAJOR EASEMENT/BARNES AVE EAST BOSTON 12 BELLE ISLE INLET29P044 NON MAJOR SHAWSHEEN ST EAST BOSTON 12 BOSTON HARBOR30J006 MAJOR EASEMENT/ALFORD ST/EVERETT CHARLESTOWN 18 MYSTIC RIVER30J019 MAJOR ALFORD ST/NORTH CHARLESTOWN 15 MYSTIC RIVER30J030 MAJOR EASEMENT/ARLINGTON AVE CHARLESTOWN 42 MYSTIC RIVER30P062 NON MAJOR PALERMO AVE EXT EAST BOSTON 12 WETLANDS30P107 NON MAJOR WALDEMAR AVENUE EAST BOSTON 15 WETLANDS31O004 NON MAJOR EASEMENT/WALDEMAR AVE EAST BOSTON 15 CHELSEA RIVER31P084 NON MAJOR EASEMENT/BENNINGTON ST EAST BOSTON 30 BELLE ISLE INLET, REVERE1 - 6

Table 1-2 Drainage Areas to Outfalls Owned by OthersMANHOLENUMBER LOCATION NEIGHBORHOOD RECEIVING WATER COMMENTS/NOTES02FMH120 NEPONSET VALLEY PARKWAY HYDE PARK DCR DRAIN TO NEPONSET DISCHARGES TO DCR OF 02F09903FMH056 WAKEFIELD AVENUE HYDE PARK DCR DRAIN TO NEPONSET DISCHARGES TO DCR OF 03F15904FMH090 FARADAY STREET HYDE PARK DCR DRAIN TO NEPONSET DISCHARGES TO DCR OF 03F16206CMH117 WASHINGTON ST NEAR MESHAKA ST WEST ROXBURY INTO DEDHAM DRAIN TO DEDHAM11BMH049 VFW PKWY @ GLENHAM ST WEST ROXBURY DCR DRAIN TO CHARLES DISCHARGES TO DCR OF 11B02814EMH036 PAYSON ROAD @ HACKENSACK ROAD WEST ROXBURY TO BROOKLINE DRAINS DRAIN TO BROOKLINE20DMH019 PRENDERGAST AVE (BC/CHESTNUT HILL RESERVOIR) BRIGHTON TO BROOKLINE DRAINS DRAIN TO BROOKLINE20DMH055 VILLAGE BROOK-STRATHMORE BRIGHTON BROOKLINE DRAINS TO VILLAGE BROOK DRAIN TO BROOKLINE21DMH319 VILLAGE BROOK-KILSYTH BRIGHTON BROOKLINE DRAINS TO VILLAGE BROOK DRAIN TO BROOKLINE21EMH064 TANNERY BROOK BRIGHTON BROOKLINE DRAINS TO TANNERY BROOK DRAIN TO BROOKLINE21EMH086 VILLAGE BROOK-CUMMINGS BRIGHTON BROOKLINE DRAINS TO VILLAGE BROOK DRAIN TO BROOKLINE23BMH089 HUNNEWELL AVENUE BRIGHTON TO NEWTON DRAINS DRAIN TO NEWTON24CMH014 NEWTON STREET BRIGHTON TO NEWTON DRAINS DRAIN TO NEWTON28IMH015 ROLAND STREET CHARLESTOWN TO SOMERVILLE DRAINS DRAIN TO SOMERVILLE1 - 7

2.0 ILLEGAL CONNECTION REMEDIATION ANDOUTFALL SCREENINGThe Commission identifies illegal sanitary connections to storm drains through severalmeans, including storm drain and outfall inspections performed by Commissionpersonnel and consultants, inspections performed by contractors, and through reportsfrom agencies, organizations, and citizens.In 2011, the Commission continued implementing illegal connection investigationscitywide, and performed targeted investigations in specific drainage areas, as describedbelow.2.1 OUTFALL SCREENINGa. Dry Weather Outfall Screening 1999-2004Between 1999 and 2004, the Commission completed dry weather screening of its majoroutfalls in accordance with the permit requirements. Screening consisted of visualinspection of the outfall structure after 24 to 72 hours of antecedent dry weather, andcompletion of a field inspection form. If the outfall structure was not accessible, thenearest upstream manhole not subject to tidal influence or backflow was inspected. Ifflow was observed, the physical characteristics (e.g. color, visible sheen, turbidity,floatables, smell, and estimate of flow) were recorded and grab samples were collectedand analyzed for surfactants and ammonia using portable field test kits. The results of the1999-2004 dry weather outfall screening were presented in previous annual reports.b. Dry Weather Outfall Screening 2010In the last several years, the Commission’s illegal connection investigations haveexpanded into many new areas, and many illegal connections have been identified andcorrected. To evaluate current conditions in the drainage system the Commissionperformed dry weather screening of all its outfalls (major and non-major) betweenMarch, 2010 and October, 2010. The screening method used in 2010 was similar to thatused during the 1999-2004 screening, except that the 2010 program included analysis ofsamples in a laboratory for bacterial indicators. The 2010 dry weather outfall screeningwas completed towards the end of 2010 and the data was compiled in 2011.The goal of the outfall inventory and dry weather screening effort was to record theactual location of Commission outfalls and to characterize each outfall’s currentcondition (size, material, flow, etc.). Outfalls were screened during dry weather, when2 - 1

there was no greater than 0.10 inches of precipitation in the 72 hours prior to screening.The intent of the field screening was to identify those outfalls with dry weather flow anddetermine if the flows were potentially contaminated. Several manholes upstream ofstorm drains interconnecting with bordering municipalities were also screened.Some outfalls were not accessible or could not be located after a 15 minute search. Also,some of the outfalls were in areas subject to tidal inflows or were otherwise be subject tobackwater effects. For these outfall locations field crews located a suitable screening sitein an upstream manhole. The selected manhole was as near the outfall as possible andfree of standing water or backflow from the receiving water.Two visits were made to most of the outfalls. The first visit was made to perform apreliminary visual inspection of the outfall and to determine if it was accessible forsampling. The second visit was made to collect water samples for analysis. Figure 2-1 isthe form completed to document the results of the first visit. Figure 2-2 is the formcompleted to document the results of the second visit.At each outfall where flow was observed samples were collected for laboratory analysisfor either E. coli bacteria or Enterococcus bacteria (depending on whether the outfalldischarged to a freshwater body versus a salt water body). Bacteria samples werecollected then immediately labeled, sealed, and stored in ice-filled coolers. They werethen transferred to G&L Laboratories of Quincy, MA for analysis within a six-hourmaximum holding time. Completed chain of custody forms accompanied each shipmentto the laboratory. In addition, samples were collected for analysis in the field for thefollowing:pH – field measurementTemperature – field measurementSpecific Conductivity – field measurementSurfactants – field measurementAmmonia – field measurementSalinity – field measurementTable 2-1 provides the results of the first visit. Table 2-2 provides the results of thesecond visit. Table 2-3 summarizes the results of the ammonia, surfactant and bacteriaanalysis. (Note: Tables 2-1 and 2-2 are too large to print on standard size paper so theyare provided on the CD) Table 2-3 also indicates which drainage areas are beinginvestigated under the Commission’s illegal connection investigation programs, andwhether there were known contamination sources in the drainage areas at the time whenthe samples were taken.2.2 ILLEGAL CONNECTION IDENTIFICATION BY COMMISSION STAFFIllegal connection investigations are performed by Commission consultants, as well as byin-house staff. Investigations performed by consultants are described in Section 2.5below. Routine reports of suspected illegal sanitary connections are usually directed to2 - 2

TABLE 2-12010 OUTFALL SCREENING RESULTSVISIT 1Boston Water and Sewer CommissionOutfall Field Screening ProgramBlue = no first visitInspected by Stacey Depasquale EngineeringFirst VisitIf outfall not located,not accessible, orgreater than 25%submerged, thenselect probablesampling location forscreening andsampling:Outfall Number Feature ID Street Location Receiving Water Inspection date/time Inspecting CompGPS Coordinates Outfall Sign Tidal Impact Time of closest lOutfall locatOutfall accesible? Outfall submerged? % Submerged Approx outfall diameter Shape Material Condition Is grate present? Condition of grate Photo #/Locatio Manhole NumbeFeature ID Comments01E 024 105640001 3 Lakeside Ave Sprague Pond, Neponset River 5/10/2010 SDE/MS-EC 42º 14' 02.3" N 71º 08' 15.4"W No No Yes Yes Yes 100% 15" Round Concrete Normal No01F031 106640001 42 Meadowview Rd Neponset River 5/10/2010, 9:35AM SDE/MS-EC 42º 13' 57.8" N 71º 07' 46.1"W No No Unknown No Unknown Unknown Unknown Unknown Unknown Unknown Unknown Unknown 01F021 106660020 MH01F022 next located MH up from outfall is standing H2O coordinates from 01F022. Pipe located off meadow Rd in area where outfall shows location on map. Cannot confirm, pipe covered in sediment 90%02E 086 205640001 113 W Milton St Unnamed wetland 5/10/10 10:10AM SDE/MS-EC 42º 14' 16.7" N 71º 08' 09.9"W No No Yes Yes No 2' Round Concrete Normal No Slow 6" depth flow02F085 206640005 45 Lawton St Neponset River Reservation 5/10/10, 10:45AM SDE/MS-EC 42º 14' 04.9" N 71º 7' 38.4"W No No No No Unknown Unknown Unknown Unknown Unknown Unknown Unknown 02F084 206660079 Coordinates taken at 2F096 which is standing water. Outfall location there is build up of brush and leaves02F093 206640003 775 Sierra Rd Neponset River 5/10/10, 11:00AM SDE/MS-EC 42º 14' 14.3" N 71º 7' 34.5"W No No No Unknown Unknown Unknown Unknown Unknown Unknown Unknown None Coordinates taken from 02F072. First MH able to locate has standing water in the line02F120 206640002 Wolcott Ct Neponset River 5/10/10, 12:00PM SDE/MS-EC 42º 14' 17.2" N 71º 7' 45.2"W No No No Unknown Unknown Unknown Unknown Unknown Unknown Unknown 02F025 206660011 Coordinates taken from 02F02503E 185 305640003 43 Norton St Wetlands/Neposet River 5/10/10, 12:40PM SDE/MS-EC 42º 14' 35.4" N 71º 08' 11.4"W Yes No Yes No No 3' Round Concrete Normal Yes, nearby, not on outfall Good 20% standing water, outfall appears to be the best option for sampling03E 186 305640002 1736 River St Mill Pond/Mother Brooke 5/10/10 1:12PM SDE/MS-EC 42º 14' 40.8" N 71º 08' 14.1"W No No Yes Yes Yes 100% 2' Round Concrete Normal, from what was visible No 03E 089 305660036 Dry03E 207 305640001 1724 River Street Mill Pond/Mother Brooke 5/10/10, 1:24PM SDE/MS-EC 42º 14' 42.2" N 71º 08' 11.0"W No No Yes Yes No 2' x 1.5' Square/Rectangluar Cracking No Tree growing into it, dry no flow04E 064 405640002 River @ Turtle Pond Mill Pond/Mother Brooke 5/11/10 8:40AM SDE/MS-EC 42º 14' 46.1" N 71º 08' 11.5"W No No No No Unknown 1' mapped Unknown Unknown Unknown Took coordinates at appropriate location according to map. Saw an opening with concrete around it but cannot confirm outfall. First upstream MH unable to locate04E 069 405640001 17-15 Knight St Mother Brooke 5/10/10, 1:50PM SDE/MS-EC 42º 14' 47.7" N 71º 07' 59.7"W Yes No Yes Yes Yes 75% Round Concrete Normal Yes Good 04E 068 405660063 Medium to fast flow of 1/2"04F016 406640003 1550 River Street Mother Brooke/Neponset River 5/11/10, 9:06AM SDE/MS-EC 42º 14' 54.4" N 71º 07' 49.4"W No No Yes Yes Yes 100% 2.5' Round Concrete Normal 04F015 40666006804F118 406640005 Mason Street Neponset River 5/10/2010 SDE/MS-EC 42º 14' 50.6" N 71º 07' 34.2"W No No Yes Yes No 1 1/2' Round Concrete Normal No04F119 406640009 1544 Hyde Park Ave Neponset River 5/11/10, 9:33AM SDE/MS-EC 42º 14' 44.9" N 71º 07' 40.2"W No No Yes Yes Yes 100% 2' Round Concrete Normal, from what was visible 04F048 406660172 Standing water in entire tributary area04F189 406640001 100 Reservation Rd Mother Brooke/Neponset River 5/11/10, 9:45AM SDE/MS-EC 42º 15' 02.4" N 71º 07' 46.3"W Yes No Yes Yes Yes 25% 3' Round Concrete Normal No 04F200 406660009 04F200 Dry04F203 406640004 55 Gleenwood Neponset River 5/10/10, 2:12PM SDE/MS-EC 42º 14' 52.5" N 71º 07' 32.1"W Yes No Yes No No 28" Round Concrete Normal No Dry outfall, not accessible by land. Barbed wire and fenced04F204 406640002 846 Truman Pkwy Neponset River 5/11/10, 10:15AM SDE/MS-EC 42º 14' 54.3" N 71º 07' 27.4"W Unknown No No No Unknown Unknown Unknown Unknown Unknown Unknown Unknown 04F219 406660194 No access to outfall, train tracks and long barbed wire fence prevents access. Coordinates taken from 04F219. Medium flow of 1/2"05C110 Easement/Pleasantdale St (into Dedham) No first visit; pipe extends into Dedham05E 180 505640002 Georgetown Dr None shown/Charles River 5/11/2010 SDE/MS-EC 42º 15' 19.5" N 71º 08' 36.5"W Yes No Yes Yes No 1' Round Concrete Normal No Dry05E 181 505640006 39 Georgetown Dr None shown/Charles River 5/11/10, 10:53AM SDE/MS-EC 42º 15' 18.2" N 71º 08' 40.3"W Yes No Yes Yes No 1' Round Concrete Normal No Dry, 75% sediment05E 182 505640005 20 Dedham St Unnamed Stream, Charles River 5/11/10, 11:15AM SDE/MS-EC 42º 15' 11.2" N 71º 08' 03.4"W Yes No Yes Yes Yes 90% 2' Round Concrete Normal, from what was visible No 05E 152 (dry) 505660131 05E 151 upstream MH is standing H2O05E 183 505640007 80 Georgetown Pl Unknown Stream 5/11/10, 11:00AM SDE/MS-EC 42º 15' 15.7" N 71º 08' 41.1"W Yes No Yes Yes No 1' Round Concrete Normal No 50% Sediment, dry05E 184 505640008 228 Turtle Pond Pl Wetlands 5/25/10, 13:20 SDE/LC-EC 42º 15' 12.5" N 71º 08' 20.2"W No No Yes Yes Yes 30% 2ft (24 in) Round VC Normal No 05E 120 505660105 Sampling location should be 05E 120 or 05E 22305F117 506640001 Truman Pkwy@Willard Neponset River 5/11/10, 12:00PM SDE/MS-EC 42º 15' 07.6" N 71º 07' 13.3"W Yes No Yes Yes No 2 3/4' Round Concrete Normal No 1/4" medium flow clear05F244 506640008 Margin St @ Hyde Park Ave Mother Brooke/Neponset River 5/11/10, 12:30PM SDE/MS-EC 42º 15' 04.2" N 71º 07' 32.01"W Yes No Yes Yes Yes 10% 2 3/4' Round Concrete Normal No05F245 506640007 1377 Hyde Park Ave Mother Brooke/Neponset River 5/11/10, 12:40PM SDE/MS-EC 42º 15' 04.9" N 71º 07' 32.7"W Yes No Yes Yes Yes 50% 2 3/4' Round Concrete Normal No 05F212 50666021705F253 506640006 Business St Neponset River 5/11/10, 12:55PM SDE/MS-EC 42º 15' 05.4" N 71º 07' 38.9"W No No Yes Yes Yes 35% 4' Round PVC Normal No 05F273 506660183 Plans to extend 14', new outfall05F254 506640004 Dana St bridge Neponset River 5/11/10, 12:05PM SDE/MS-EC 42º 15' 06.2" N 71º 07' 22.6"W Yes No Yes Yes No Round VC Cracking No Dry05G112 507640002 54 Walter St Neponset River 5/17/10, 8:45AM SDE/EC-LC 42º 15' 20.1" N 71º 07' 59.3"W No No Yes Yes No 2ft (24in) Round Concrete Normal No Outfall observed dry. Outfall at neponset River may be mssing upstream pipe segment, refer to photos05G115 507640006 150 Fairmount Ave Neponset River 5/17/10, 8:33AM SDE/LC-EC 42º 15' 13.0" N 71º 07' 07.3"W No No Yes Yes No 2ft (24in) Round VC Normal No Outfall obs dry05G116 507640007 Fairmount @ Truman Neponset River 5/11/2010, 12:10PM SDE/MS-EC 42º 15' 11.0" N 71º 07' 07.4"W No No Yes Yes No 2' Round Concrete Normal Dry05G116A 507640007 5 Warren Ave Neponset River 5/11/10, 12:30PM SDE/MS-EC 42º 15' 13.4" N 71º 07' 05.6"W Yes No Yes Yes No 2' Round VC Normal No Slow flow, clear 1/4"06D057 604640001 30 Cedar Crest St Charles/Wetland 4/29/10, 10:04AM SDE/LC-EC 42º 15' 42.1" N 71º 09' 00.7"W Unknown No No Unknown Unknown Unknown 21in (from map) Unknown Unknown Unknown Unknown 07D137 704660109 GPS Coordinate taken at DMH 06D150, was observed with standing water, DMH 07D132 was 50% standing water. 07D137 was observed with 0.25in of clear flow. Outfall should be located in a wooded are, but unable to find06D083 604640008 52 Margaretta Dr Wetlands/Charles 4/29/10, 7:53AM SDE/LC-EC 42º 15' 27.7" N 71º 08' 46.4"W Yes No Yes Yes No 1.25ft (15 in) Round Concrete Normal No Outfall observed dry06D084 604640007 26 Margaretta Dr Wetlands/Charles 4/29/10, 8:40AM SDE/LC-EC 42º 15' 27.1" N 71º 08' 44.3"W No No No Unknown Unknown Unknown 1ft (from map) Unknown Unknown Unknown Unknown 06D082 604660139 GPS Coordinate taken at DMH 06D082. DMH 06D082 was observed dry06D085 604640006 4 Margaretta Dr Wetlands/Charles 4/29/10, 8:07AM SDE/LC-EC 42º 15' 28.3" N 71º 08' 42.8"W Yes, but incorre No Yes Yes Yes 50% 1.25ft (15 in) Round Concrete Normal No 06D088 604660140 Incorrectly labelled as 06D086. DMH 06D088 can be used as sampling location06D086 604640005 442 Georgetowne Dr Wetlands/Charles 4/29/10, 8:11AM SDE/LC-EC 42º 15' 28.9" N 71º 08' 42.4"W No No Yes Yes Yes 100% 10in Round Concrete Normal No ? No upstream DMH from which to sample, but there is an unmapped MH for the two CBs with a bell outlet06D091 604640003 412 Georgetowne Dr Wetlands/Charles 4/29/10, 8:24AM SDE/LC-EC 42º 15' 31.4" N 71º 08' 42.9"W Yes No Yes Yes Yes 95% 0.83ft (10in) Round Concrete Normal No No upstream MHs from which to sample06D097 604660108 5 Willers St Unknown/Dedham 4/29/10, 9:48AM SDE/LC-EC 42º 15' 31.5" N 71º 08' 04.5"W Unknown No No Unknown Unknown 4.25ft (51in) from map Unknown Unknown Unknown Unknown 06D097 604660108 GPS coordinates taken from DMH 06D097. Outfall for line located in Dedham or may connect to Dedham drain06D184 604640002 400 Georgetowne Dr Wetlands/Charles 4/29/2010, 8:34AM SDE/LC-EC 42º 15' 31.8" N 71º 08' 43.3"W Yes No Yes Yes Yes 33% 1.5ft Round Concrete Normal No Upstream MHs could not be located06D187 604640004 Brook Grove St Cemet Cemetary 4/29/10, 12:51PM SDE/LC-EC 42º 15' 29.7" N 71º 09' 22.9"W No No No Unknown Unknown Unknown 3ft, from map Unknown Unknown Unknown Unknown 06D108 604660121 GPS coordinates taken at DMH 06D108. There is no sign that oufall exists as mapped06F233 Unknown B7 Mt Ash St Wetlands-Stoney Brook Reserved5/17/10, 9:50AM SDE/LC-EC 42º 15' 24.7" N 71º 07' 51.5"W No No Yes Yes Yes 75% 1 1/2ft (18") Round Concrete Pipe Separating No No upstream MH mapped06G108 607640005 892 River St Neponset River 5/13/2010, 1:00PM SDE/MS-EC 42º 15' 39.9" N 71º 06' 31.0"W Yes No Yes Yes No 5.75ft Round Concrete Normal No 1/2" of clean medium flow06G109 607640001 River Ter Neponset River 5/13/10, 1:15PM SDE/MS-EC 42º 15' 38.4" N 71º 06' 42.9"W Yes No Yes Yes No 4ft Round Concrete Normal No No flow in pipe, dry06G110 607640002 West St @ Neponset River Neponset River 5/13/10, 1:22PM SDE/MS-EC 42º 15' 26.4" N 71º 06' 55.6"W Yes No Yes Yes Yes 25% 2 1/2ft Round Concrete Normal No 06G047 60766006006G111 607640003 Vose @ Truman Pkwy Neponset River 5/13/10, 1:50PM SDE/MS-EC 42º 15' 24.5" N 71º 06' 54.6"W Yes No Yes Yes No 2ft Round Concrete Normal No Trickle of flow, clear06G165 607640006 Truman Pkwy Neponset river 5/17/10, 10:25AM SDE/EC-LC 42º 15' 29.9" N 71º 06' 45.5"W Yes No Yes Yes No 1 1/2ft (18") Round Concrete Normal No Trickle of clear/cloudy slow flow06G166 607640004 Truman Hwy Neponset River 5/17/10, 10:20AM SDE/EC-LC 42º 15' 30.0" N 71º 06' 45.5"W Yes No Yes Yes No 2 1/2ft (30") Round Concrete Normal No 0.10" of flow, clear, medium speed06H106 608640004 700 Scela Neponset River 5/17/10, 11:05AM SDE/EC-LC 42º 15' 38.7" N 71º 06' 05.6"W No No Yes Yes No 2' Round Concrete Normal No Dry06H107 608640005 87 Belnat Neponset River 5/17/10, 11:30AM SDE/LC-EC 42º 15' 36.8" N 71º 06' 15.0"W Yes No Yes Yes No 2' Round Concrete Normal No Outfall observed dry07C006 703640001 VFW @Toyota Dealer Charles River 4/29/10, 13:50 SDE/LC-EC 42º 15' 54.9" N 71º 10' 6.3"W Yes No Yes Yes Yes 20% 10.5 x10.5 ft (126 x 126 in) Square Concrete Corrosion Good Outfall observed with about 2 ft. of cloudy flow (slow). Corrosion is very minor and just at water level07H105 708640003 10 Edgewater Dr Neponset River 5/17/10, 12:59PM SDE/EC-LC 42º 16' 00.2" N 71º 05' 41.1"W No No Yes Yes No 8.5 x 5.25 ft (from map) Semicircle Concrete Normal No Outfall observed with 0.5" of cloudy flow and smelled of sewer07H285 708640001 Blue Hill Bridge Neponset River 5/25/10, 14:00 SDE/LC-EC 42º 16' 01.4" N 71º 05' 37.6"W Yes No Yes Yes, but only by enteringNo 8.83' x 5.25' (106" x 63") fro Semicircle Concrete Normal No Outfall observed with 0.25 in of cloudy flow. Outfall is only accessible by walking up river in 2.5ft of water. GPS point taken from aprox. Discharge point on bridge above outfall07H287 708640002 542 River St Neponset River 5/25/10, 13:45 SDE/LC-EC 42º 16' 00.9" N 71º 05' 41.1"W No No No Unknown Unknown Unknown 1ft (from map) Unknown Unknown Unknown Unknown GPS coordinates taken at CB in rton of 542/532 River st. Outlet in CB to outfall has been bricked up and there is now a bell suspected to connect to 07H104 which is part of 07H285 trib area07H346 708640009 35 Holmfield Ave Nepsonet River 5/25/10, 11:53AM SDE/LC-EC 42º 15' 44.7" N 71º 05' 57.8"W No No Yes Yes No 2ft Round Concrete Normal Yes Good Outfall observed dry. Some debris caught in grate07H347 708640008 99 Edgwater Dr Neponset River 5/17/10, 12:08PM SDE/LC-EC 42º 15' 49.0" N 71º 05' 50.6"W Yes No Yes Yes No 2ft Round Concrete Cracking Yes Fair, due to debris stuck, structurally good Outfall observed dry07H348 708640007 69 Edgewater Dr Neponset River 5/17/10, 12:19PM SDE/LC-EC 42º 15' 53.1" N 71º 05' 47.4"W Yes No Yes Yes No 2ft Round Concrete Normal Yes Fair, due to debris stuck, structurally good Outfall observed wth

TABLE 2-22010 OUTFALL SCREENINGVISIT 2Boston Water and Sewer CommissionOutfall Field Screening ProgramYellow = No second visitInspected by Stacey Depasquale EngineeringBlue= Manhole to drains owned by others; no first visitSecond VisitGreen= not sampledObservational Information: Visual Observations at Outfall: If Sampling Location is a Manhole: Visual Observations at Manhole: Field Analysis Information: Record field screening results:Outfall Nu Feature ID Outfall Number Feature ID Street Location Receiving Water Inspection date/time Inspection Company Weather Air Temp Time since last r Quantity of rain last 24 houIf tidal, time of closes Is there flow? Approx velocity Approx sediment depth Approx depth water aOdor Color Clarity Turbidity Deposits/stain Sampling location Manhole # If MH, list feature ID Comments Approx pipe diameter Pipe shape Pipe material Condition Is there flow? Approx flow velocity Approx sediment depth Approx depth water and sediment Odor Color Clarity Turbidity Deposits/stains Were samples collected? If no, provide reason Surfactants: pH Specific Conduct Ammonia Temperature Salinity Comments1 01E 024 105640001 1 01E 024 105640001 3 Lakeside Ave Sprague Pond, Neponset River 8/16/10, 8:45 AM Cloudy 75ºF >72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 3 7.11 430 >10 25.1ºC 0.2ppt8 03E 186 305640002 8 03E 186 305640002 1736 River Street Mill Pond/Mother Brook 8/16/10, 11:40AM SDE/MS-LC Cloudy 75ºF >72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 3 7.12 707 >10 24.4 0.4ppt18 05C110 20 05C110 503640001 Easement/Pleasantdale Street Exit Dedham 8/17/10, 2:30PM SDE/MS-LC Sunny 80ºF >72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 3 7.36 939 >10 24.6 0.6ppt24 05F117 506640001 26 05F117 506640001 Truman Pkwy @ Williams Neponset River 8/17/10, 9:30AM SDE/MS-LC Sunny 80ºF >72 hours 72 hours 72 hours 3 7.22 480mc >10 27.8 0.3ppt27 05F253 506640006 29 05F253 506640006 Business Street Neponset River 8/17/10, 10:45AM SDE/MS-LC Sunny 80ºF >72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours Unable to observe outfall Manhole 12H028/029 No, standing water No Standing water Receiving water has upstream contamination from 11I577, outfall suspected to be 100% submerged101 12H092 1.209E+09 102 12H092 1208640001 American Legion Hwy off-ramp Canterbury Brook 9/21/10, 10:12AM SDE/EC-LC Sunny 65ºF >72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours 72 hours

Boston Water and Sewer CommissionOutfall Field Screening Program Yellow = No second visit Investigation complete Investigation completeTABLE 2-32010 OUTFALL SCREENINGSUMMARY OF WATER QUALITY SAMPLING RESULTSInspected by Stacey Depasquale Engineering Blue= Manhole to drains owned by others; no first visit Investigation in progress Investigation in progressInvestigation PendingInvestigation PendingSecond VisitObservational Information: Visual Observations at Outfall: Visual Observations at Manhole: Field Analysis Information: Record field screening results:Weresamplescollected? If no, provide reason AnalyteOutfall Number Street Location Receiving Water Is there flow? Approx velocity Sampling location Manhole # Is there flow?Approx flowvelocityBacterial Results(cfu/100 mL)Surfactants(ppm)Ammonia(ppm)01E 024 3 Lakeside Ave Sprague Pond, Neponset River No Manhole 01E 021 Yes Trickle Yes E. coli 170 0 0 N01F 031 42 Meadowview Road Neponsett River No No No No flow, standing water N02E 086 113 W. Milton Street Unnamed Wetland No No No No flow, standing water N02F085 45 Lawton Street Neponset River Reservation No No No No flow, standing water N02F093 77 Sierra Rd Neponset River No No No No flow, standing water N02F120 Wolcott Ct Neponset River Outfall not located Manhole 02F025 Yes Moderate Yes E. coli 55 0 0 N03E 185 23 Norton Street Wetlands/Neponset River No Manhole 03E 101 Yes, very slow flow 50% submerged Yes E. coli >80000 >3 >10 Y03E 186 1736 River Street Mill Pond/Mother Brook No No None No No flow, standing water N03E 207 1724 River street Mill Pond/Mother Brook No No No flow, dry N03F056 Wakefield ave Neponset River No Manhole 03F056 Yes Trickle Yes E. coli 2400 0 0 Y04E 064 River @ Turtle Pond Mill Pond/Mother Brook No, outfall not found No No flow, dry N04E 069 17-15 Knight Street Mother Brook Yes Moderate Manhole 04E 068 Moderate Yes E. coli 2700 0 0.6 N04F016 1550 River Street Mother Brook/Neponset River No No No No flow, standing water N04F090 Faraday St Neponset River No No No No flow Y04F118 Mason st Neponset River No No No flow N04F119 1544 Hyde Park Ave Neponset River No No No No flow, standing water N04F189 100 Reservation Road Mother brook/Neponset River No No No No flow Y04F203 55 Glenwood Ave Neponset River No No No No flow N04F204 846 Truman Pkwy Neponset River No access to outfall Manhole 04F219 Yes Moderate Yes E. coli >80000 >3 >10 Y05C110 Easement/Pleasantdale Street Exit Dedham No No No No flow N05E 180 Georgetown Drive None shown/Charles River No No No No flow N05E 181 39 Georgetown Drive None shown/Charles River No No No No flow N05E 182 20 Dedham St Unnamed stream/Charles River No No No No flow N05E 183 80 Georgetown Dr Unknown Stream No No No No flow N05E 184 228 Turtle Pond, PA pkwy wetlands Yes Moderate Outfall Yes E. coli >80000 >3 >10 N05F117 Truman Pkwy @ Williams Neponset River Yes Trickle Outfall Yes E. coli 190 0.5 0 Y05F244 Margin St@ Hyde Park Ave Mother Brook/Neponset River No No No No flow N05F245 1377 Hyde Park Ave Mother brook/Neponset River No, standing water None, submerged 60% Manhole 05F209 Yes Moderate Yes E. coli 670 >3 >10 Y05F253 Business Street Neponset River Unknown Manhole 05F273 Yes Yes E. coli 80 0 0 N05F254 Dana St Bridge Neponset River No No No flow N05G112 54 Walter St Neponset River No, outfall partially collapsed Manhole 06G063 Yes Moderate Yes E. coli 80000 1ppm 2ppm Y06F233 37 Mt. Ash Street Wetlands - Stony Brook ReservationNo No No No flow N06G108 892 River Street Neponset River Yes Moderate Outfall Yes E. coli 4900 0 7ppm Y06G109 River Terr. Neponset River No No No No flow N06G110 West St @ Neponset River Neponset River Yes Trickle Outfall Yes E. coli 1200 0 0 Y06G111 Vose @ Truamn Pkway Neponset River No, standing water 05G132 No No No flow, standing water N06G165 Truman Pkwy Neponset River Yes Trickle Outfall Yes E. coli >80000 3+ ppm 10+ ppm Y06G166 Truman Pkwy Neponset River No No No No flow N06H106 70 Oscela Neponset River No No No No flow N06H107 87 Belnel Road Neponset River No No No No flow Y07C006 VFW @ Toyota Dealer Charles Yes Moderate Outfall Yes E. coli 190 0ppm 0.2ppm Y07H105 40 Edgwater Road Neponset River Yes Moderate Outfall Yes E. coli 35000 2ppm 10+ ppm Y07H285 Blue Hill Bridge Neponset River Yes Moderate Outfall Yes E. coli 19000 0ppm 10ppm Y07H287 542 River Street Neponset River CNL No Could not locate OF; Drain serves only 1 cb N07H346 35 Holmfield Ave Neponset River No No No No flow N07H347 99 Edgewater Drive Neponset River No No No No flow N07H348 69 Edgewater Drive Neponset River No No No Insufficient flow to sample N08B122 A VFW Pkwy Charles River Yes Trickle Outfall Yes E. coli 20 0 0 N08B122 B VFW Pkwy Charles River Yes Trickle Outfall Yes E. coli 2500 0 1.5 N08B126 VFW @ Bridge st Charles River No, standing water about 50% submerged Manhole 08B040 - no sample taken No 0 No No flow Y08C025/26 11Waverly Road None shown Yes Moderate Outfall Yes E. coli 100 0ppm 0.3ppm N08E 031 Turtle Pond Pkwy Turtle Pond Yes Trickle Outfall Yes E. coli 2100 0ppm 0.5ppm N08E 033 Turtle Pond Pkwy Turtle Pond No No No No flow N08E 035 Washington @ La Grange Turtle Pond No No No flow N08I153 15 Duxbury Road Neponset River No No No flow N08I154 347 River Street Neponset River Yes Trickle Outfall Yes E. coli 230 0ppm 0.6ppm N08I155 383 River Street Neponset River No No No No flow N08I156 395 River Street Neponset River No No No No flow Y08I158 405 River Street Neponset River No No No No flow N08I207 56 Meadowbank Ave Neponset River No No No No flow N08I209 38 Meadowbank Road Neponset River No No No No flow N08J041 118-116 River Street Neponset River No No No No flow N08J050/049 23 Desmond Road Neponset River Yes Moderate Outfall Yes E. coli

Boston Water and Sewer CommissionOutfall Field Screening Program Yellow = No second visit Investigation complete Investigation completeTABLE 2-32010 OUTFALL SCREENINGSUMMARY OF WATER QUALITY SAMPLING RESULTSInspected by Stacey Depasquale Engineering Blue= Manhole to drains owned by others; no first visit Investigation in progress Investigation in progressInvestigation PendingInvestigation PendingSecond VisitObservational Information: Visual Observations at Outfall: Visual Observations at Manhole: Field Analysis Information: Record field screening results:Weresamplescollected? If no, provide reason AnalyteOutfall Number Street Location Receiving Water Is there flow? Approx velocity Sampling location Manhole # Is there flow?Approx flowvelocityBacterial Results(cfu/100 mL)Surfactants(ppm)Ammonia(ppm)09K016 65-67 Bearse Ave Neponset River Delta CNL No No No flow N09K100 65-67 Bearse Ave Neponset River Delta No No No No flow N09K101 65-67 Bearse Ave Neponset River Delta Yes Trickle Outfall Yes Enterococcus 24000 0ppm 1ppm N09L095 Granite Ave Bridge Neponset River Delta Yes Trickle Outfall Yes Enterococcus 3400 1ppm 0ppm N10B015 49 Charles Park Road Cow Island Pond/Charles River No 100% submerged No No Standing water 100% submerged Y10L094 40 Hallet Road Neponset River Delta Yes Trickle Outfall Yes Enterococcus 560 0ppm 0ppm Y10L096 64 Hilltop Street Neponset River Delta Manhole 10L164 Yes Moderate Yes Enterococcus 2400 1ppm 0.2ppm N11B123 1100 VFW Pkwy Brook Farm Brook/Charles River CNL/submerged Manhole 11C261 Yes Trickle Yes E. coli >80000 3+ppm 10+ppm Y11G318 289 Walk Hill Canterbury Brook No No No No flow N11G319 289 Walk Hill Canterbury Brook No No No No flow N11I577 Harvard @ Hansborough Canterbury Brook Yes Trickle Outfall Yes E. coli >80000 2ppm 10+ ppm Y11M093 Neponset Ave Bridge Neponset River Yes Trickle Outfall Yes Enterococcus 150 1ppm 0ppm N12B010 Baker St @ Brook Farm Brook Brook Farm Brook No Submerged 100% No No Submerged 100% N12B014 Baker St @ Brook Farm Brook Brook Farm Brook No Submerged 100% Manhole - not sampled No, standing water No Standing water N12B031 Baker St @ Brook Farm Brook Brook Farm Brook No/NA No No No flow N12B033 Baker St @ Brook Farm Brook Brook Farm Brook NA Manhole/NA No No No flow N12B124 Lagrange St @ St. Joseph's Cemetary Brook Farm Brook Yes Trickle Outfall Yes E. coli 69000 2.5ppm 10ppm Y12F305 59 Arborough Road Unnamed wetland No No No No flow N12F418 Walter Street Not shown No No No No flow N12H085 Morton Street @ American Legion Hwy Ramp Canterbury Brook Unable to observe outfall Manhole 12H025 No, standing water No Standing water N12H087 Morton Street @ American Legion Hwy Ramp Canterbury Brook Unable to observe outfall Manhole 12H028/029 No, standing water No Standing water N12H092 American Legion Hwy off-ramp Canterbury Brook No Submerged 100% Manhole 12H046 - no sample taken No No No flow N12L092 Lawley + Tenean St Neponset River Yes Trickle Outfall Yes Enterococcus 130 1.5ppm 0ppm N12L296 Conley St Neponset River/Dorchester Bay Yes Trickle Outfall Yes Enterococcus 80 1ppm 0ppm N12M091 Walnut @ Ericcson Neponset River Yes Trickle Outfall Yes Enterococcus 140 1ppm 0ppm N13B011 1409 Lagrange Unnamed Stream No No No No flow N13D077/78 West Roxbury Pkwy @ VFW pkwy Bussey Brook Manhole 13D054 Yes Trickle Yes E. coli 73000 0ppm 0ppm Y13E 174 8-10 VFW Pkwy Bussey Brook No, standing water 10 No No Standing water Y13E 175 Centre @ VFW Pkwy Bussey Brook Yes Moderate Outfall Yes E. coli 15000 0ppm 0ppm Y13E 176 Hebrew Rehab Center None shown No Manhole 12E 146 No No Insufficicient flow to sample N13F011 Centre Street Bussey Brook Unknown Manhole 14F146 & unmapped DMH in AYes Trickle Yes E. coli 20 0 0 Y13F012 Walter Street @ Bussey Brook Bussey Brook No No No No flow N13F095 Bussey St @ Arboretum entrance Bussey Brook No No No No flow N13L090 Victory Road @ 93 off ramp Dorchester Bay Yes Trickle Outfall Yes Enterococcus 5200 2.5ppm 5ppm Y14C009 14 West Gate Road Unnamed wetlands No None, submerged 60% No No No flow N15F288 Arnold Arboretum Goldsmith Brook Yes Trickle Outfall Yes E. coli 1500 0 0 N15L088 Dorchester Yacht Club Dorchester Bay Yes Moderate, submerged 40%, but flow Outfall Yes Enterococcus 80 1.25ppm 0 Y15L089 Savin Hill Yacht Club Dorchester Bay Manhole 15L006 Yes Moderate Yes Enterococcus 610 1.0ppm 1.5ppm Y16L097 301 Savin Hill Pattons Cove Yes Trickle Outfall Yes Enterococcus 50 1ppm 0ppm N16L122 Morrissey Blvd. Dorchester Bay No Outfall in construction N17F012 Francis Parkman Drive @ Perkins Jamaica Pond No No No No flow N17M033 Umass Boston Old Harbor No No No Standing water all the way up to MH 17M027 N18G233 Olmstead Park Leverett Pond Yes Moderate Outfall Yes E. coli >80000 0.5ppm 10ppm Y18L087 Bayside Expo Dorchester Bay No, standing water Manhole 18L001 Yes Trickle Yes Enterococcus 510 1.25ppm 0 N19G043 Riverway @ Huntington Ave Muddy River No Manhole 19G015 No, both inlets dry No No flow Y19G194 Riverway @ Huntington Ave Muddy River Yes but inaccessible Moderate Manhole 19G031 Yes Moderate Yes E. coli

Boston Water and Sewer CommissionOutfall Field Screening Program Yellow = No second visit Investigation complete Investigation completeTABLE 2-32010 OUTFALL SCREENINGSUMMARY OF WATER QUALITY SAMPLING RESULTSInspected by Stacey Depasquale Engineering Blue= Manhole to drains owned by others; no first visit Investigation in progress Investigation in progressInvestigation PendingInvestigation PendingSecond VisitObservational Information: Visual Observations at Outfall: Visual Observations at Manhole: Field Analysis Information: Record field screening results:Weresamplescollected? If no, provide reason AnalyteOutfall Number Street Location Receiving Water Is there flow? Approx velocity Sampling location Manhole # Is there flow?Approx flowvelocityBacterial Results(cfu/100 mL)Surfactants(ppm)Ammonia(ppm)24C174 Nonantum Road Charles River Yes Trickle Outfall Yes E. coli 70 0 0 N24D032 1750 Leo M Birmingham Pkwy Charles River No, standing water Manhole 24D090 Yes Moderate Yes E. coli 3300 0ppm 0.5ppm Y24D150 1550 Soldiers Field Road Charles River No No No No flow N24G034 Soldiers Field road Charles River Manhole - no sample taken No, standing water No Standing water N24G035 Soldiers Field Road Charles River Manhole - no sample ta 23F286 Yes Moderate Yes E. coli 5000 3ppm24L057 State Street Ext. Boston Inner Harbor N24L233 390 Atlantic Ave Boston Inner harbor Unknown, not visible if flow but outfall can be seen Submerged 15% Manhole 24L234 Yes Trickle Yes Enterococcus 70 1.5ppm 0 N25D040 Soldiers Field Road @ West Charles River Unknown Manhole 25D023 Yes Trickle Yes E. coli 330 0 0 Y25E 037 Soldiers Field Road Charles River No, standing water Submerged 100% Manhole 2.50E+132 Yes Moderate Yes E. coli 14000 0ppm 5ppm Y25G006 Soldiers Field @ Western Ave Charles River No Submerged 25% Manhole - no sample ta 25F152 No No No flow N25G041 Soldiers Field @ Western Ave Charles River No No, checked 25F103 No No flow N25L058 Atlantic Ave @ Waterfront Park Boston Inner harbor Yes Trickle Outfall Yes Enterococcus 70 1.5ppm 0 N25L144 Commercial St @ Clark Street Boston Inner harbor No, standing water Submerged 50% NA NoNo Flow/Standing water (Only 1 MH (starter)upstream; would have to sample OF at extreamlow tide)N26F038 Anderson Bridge Charles River Unable to access Manhole 25F074 Yes 0 Yes E. coli 300 0.75ppm 0.8ppm N26G001 Soldiers Field Road Charles River No Manhole 25F170 No No No flow N26J052 Museum of Science Charles River Unable to locate Manhole 26J037 Yes Trickle Yes E. coli 10 0 10ppm N26J055 Leverett Circle Charles River CNL NoCould not locate OF or US MH; area underconstructionN26K035 Beverly St near TD Garden Charles River Yes Trickle Outfall Yes Enterococcus 160 1ppm 0 N26K052 551 Commercial Street Charles River CNL Manhole 26K269 Yes Trickle No Insufficient flow to sample N26K099 Constitution Road @ Warren Street Charles River Unknown Submerged 100% Manhole, but standing water No Standing water N26K245 End of Water Street Charles River No No No No flow N26L055 Battery Warf Boston Inner harbor N26L084 Lewis @ MBTA staff house Boston Inner harbor Yes Trickle Outfall Yes Enterococcus 55 1.25ppm 0 N27J001 Boston Sand and Gravel Millers River CNL No NoCould not locate outfall/possibly moved duringCAT projectN27J044 Boston Sand and Gravel Millers River Unknown No No No flow, standing water N27J096 Boston Sand and Gravel Millers River No No No No flow N27L020 Courageous Sailing Center Boston Inner harbor No No Standing water N28I015 Roland St Somerville Drain NA Manhole-not sampled 28M015 No No flow N28K010 31 Old Landing Way Little Mystic Channel Unknown Submerged 100% Manhole 28K057 Yes Trickle Yes Enterococcus 50 0ppm 0ppm N28K061 73 Old Ironside Way Little Mystic Channel No Submerged 100% Manhole 28K063 Yes Moderate Yes Enterococcus 33000 0ppm 3ppm N28K386 Terminal St Boat Ramp Little Mystic Channel No/unknown Submerged 100% No, observed dry None No No flow N28L073 114 Sixteenth Street Little Mystic Channel No Could not locate N28L074/075/076 16th Street @ 5th Street Little Mystic Channel Manhole 28L031 Yes Moderate Yes Enterococcus 120 1.25ppm 0 N28L077 16th Street @ 5th Street Little Mystic Channel CNL No CNL N28N156 Short St @ Coleridge St Boston Harbor No No No No flow Y28N207 95 Cowper Street Boston Harbor Yes Moderate Outfall Yes Enterococcus 570 1ppm 0ppm Y28O025 177 Coleridge St Boston Harbor Yes Trickle Outfall Yes Enterococcus 70 0.75ppm 0ppm N28P001 Bayswater St @ Nancia St Boston Harbor Yes Outfall Yes Enterococcus 5400 0.5ppm 10+ppm Y29J029 JJ Ryan Playground Mystic River No No No No flow N29J129 JJ Ryan Playground Mystic River No No No No flow N29J212 545 medford Street Mystic River Yes Moderate, submerged 45% but had f Outfall Enterococcus 5600 0ppm 0.3ppm N29M049 Condor St @ Glen Chelsea River Yes Moderate Outfall Yes Enterococcus 2500 1ppm 0ppm N29N015 Chelsea St @ Chelsea St Bridge Chelsea river Yes Moderate Outfall Yes Enterococcus 30 1ppm 0ppm N29N135 150 McClellan Hwy Chelsea River Yes Trickle Outfall Yes Enterococcus 90 1ppm 0ppm N29O001 917 Bennington St Boston Harbor Could not access Manhole 29O161 Yes Moderate Yes Enterococcus 4000 1.5ppm 0.6ppm Y29P015 150 Barnes Ave Belle Isle Inlet CNL 29P014 No, standing water Submerged 100% No No flow N29P044 Shawsheen Rd @ Bayswater St Boston Harbor Yes Trickle Outfall Yes Enterococcus 1100 1ppm 10ppm Y30J006 MWRA @ Ashford St Mystic River Yes Trickle Outfall Yes Enterococcus 40 1.5ppm 0ppm N30J019 Alford Street/Malden Blvd Mystic River No No No flow N30J030 MBTA station at Arlington Ave Mystic River No No No No flow N30P062 Leverett Ave @ Lawn Ave Wetlands CNL No No No flow N30P107 Waldemar Ave @ Faywood Brook/Wetlands No No No No flow N31O004 McClellan Hwy @ (cant read?) Chelsea River Submerged Submerged 100% Manhole 31O012 Yes Moderate Yes E. coli 3200 0ppm 0ppm N31P084 Bennington St @VFW Belle Isle Inlet Yes Trickle Outfall Yes Enterococcus 670 2ppm 0ppm NUnable to telldue toopaque black YKnowncontaminationsources attime ofsampling2 - 11

the Commission’s Field Engineering Division. Field Engineering is currently comprisedof the Director of Engineering Services, Deputy Director of Engineering Services, aManager of Field Engineering, a Systems Engineer, and five (5) Field Service Engineers,plus seven (7) day-shift crews, which includes one (1) Saturday crew. In 2011, a FieldEngineer and two Field Engineering crews spent about 30 percent of their timeinvestigating illegal sanitary connections.Illegal connection related work performed by Field Engineering staff in 2011 focused onperforming targeted investigations and providing field support to the Commission’sconsultant for the Citywide Illegal Connection Investigation Phase 2 program (CWI2),which is described below. The methodology for investigations performed by FieldEngineering vary, but usually consist of manhole inspections, dye testing of buildings,video inspections of pipes, and occasionally sandbagging of manholes. FieldEngineering staff also respond to hazardous materials spills and illegal dumpingcomplaints, including initial response, investigation, coordination with other agencies,enforcement and cleanup where applicable.2.3 ILLEGAL CONNECTION INVESTIGATION CONTRACTSSince 1999, the Commission has executed three contracts to have consultants performillegal connection investigations of the Commission’s drainage system. The Stony BrookIllegal Connection Investigation (SBI) Program was carried out between 1999 and 2005,at a cost of $1,478,709, plus $57,388 for police details. The Citywide Illegal ConnectionInvestigation (CWI or Phase 1) Program began in 2004 and concluded in February, 2009.Total cost for the program was $1,536,000, plus an additional $71,898 for police details.Under the SBI and CWI, a total of 4,255 manholes were inspected and 6,791 buildingswere dye tested.These costs for the SBI and CWI programs do not include the cost to correct the illegalconnections found, nor do they include other costs borne by the Commission foractivities, such as performing additional dye tests, cleaning pipes and manholes, programmanagement, construction oversight and other support services.In October 2008, the Commission executed a contract for continuation of its CitywideIllegal Connection Investigation Program. The contract duration for the Citywide IllegalConnection Investigation Program Phase 2 (CWI2) is four years. Since CWI2 started, atotal of 2,350 manhole inspections have been performed and 3,800 buildings have beendye tested.In April 2011, an amendment was made to the CWI2 contract, increasing the ceiling priceby $300,000. Current total estimated cost for Phase 2 is $1,660,000. As of the end of2011, $1,307,824 had been expended for the contract services under CWI2, and $110,382had been spent on police details.2 - 12

The cost borne by the Commission to correct 45 illegal connections 1 in 2011 wasapproximately $375,631, not including the cost for police details, permits, inspectionfees, or for permanent paving over the excavations. This cost also does not include costsborne by the owners who were required to correct illegal connections on their ownproperties.2.4 DRAINAGE AREA INVESTIGATIONSThe Commission is currently advancing illegal connection investigations in all of themajor watersheds within Boston. Figure 1-1 provided at the end of Section 1 shows thelocations of the Commission’s outfalls and their tributary areas. The map also illustratesthe current status of illegal connection investigations in each drainage area. Table 2-4 isa tabular representation of all of the Commission’s outfalls/ drainage areas, includingtheir size category (major vs. non major), and current investigation status. Currently thereare 86 drainage areas under investigation. Investigations have been completed in 81drainage areas.In 2011, investigations in drainage areas tributary to outfalls discharging in closeproximity to beaches continued to take first priority. Investigations in areas startedduring SBI and CWI were given the next level of priority. The next priority forinvestigations was given to the areas opened for investigation under CWI2. Areasreceiving lower priority were generally those that are very small in size and have fewbuildings, and/or those that discharge to tidally influenced receiving waters.A detailed description of the Commission’s methodology for prioritizing the order ofinvestigations under CWI and CWI2 can be found in Section 2.5 of the Commission’s2009 Stormwater Management Report. In 2012, the Commission will reevaluate itspriorities for drainage area investigations based on the more recent outfalls screeningdata.2.5 INVESTIGATION METHODOLOGYThe Commission’s method for illegal connection investigations under the SBI, CWI andCWI2 is a “top-down” approach, meaning that the investigations start at the upperreaches of drainage areas and proceed downstream as illegal connections and otherproblems are identified and resolved. Visual inspections of storm drain manholes areperformed after 24 to 48 hours of dry weather. If flow is observed in a manhole, the flowis tested in the field for ammonia and surfactants using a field test kit. If no flow isobserved, manholes at key junctions of the sub-drainage area are sandbagged for 24 to 48hours to capture possible intermittent flow from upstream storm drains. Any flow that iscaptured after 24 to 48 hours of sandbagging is inspected and field tested for evidence ofcontamination. If evidence of contamination exists, upstream buildings are dye tested todetermine the locations of the illegal connection. Once the illegal connection is located,1 Cost for correction of two illegal connections were not included in this total since they were corrected inthe course of other construction projects and costs were not available.2 - 13

Table 2-4Drainage Area Investigation Status2011OUTFALLNUMBER CATEGORY LOCATION NEIGHBORHOOD RECEIVING WATERSTATUS OFINVESTIGATION12L296 MAJOR CONLEY STREET DORCHESTER NEPONSET RIVER/DORCHESTER BAY IN PROGRESS13L090 MAJOR VICTORY RD. 200 FT SOUTH DORCHESTER DORCHESTER BAY IN PROGRESS15L088 MAJOR FREEPORT WAY EXTENDED DORCHESTER DORCHESTER BAY IN PROGRESS15L089 MAJOR FOX POINT RD EXTENDED DORCHESTER DORCHESTER BAY IN PROGRESS28N156 NON-MAJOR COLERIDGE ST EXT EAST BOSTON BOSTON HARBOR IN PROGRESS28N207 MAJOR MOORE ST EAST BOSTON BOSTON HARBOR IN PROGRESS28O025 NON-MAJOR COLERIDGE/WADSWORTH ST. EXT EAST BOSTON BOSTON HARBOR IN PROGRESS28P001 NON-MAJOR EASEMENT/NANCIA STREET EAST BOSTON BOSTON HARBOR IN PROGRESS NEAR BEACH29O001 MAJOR BENNINGTON ST (CONSTITUTION BEACH) EAST BOSTON BOSTON HARBOR IN PROGRESS STARTED UNDER SBI29P044 NON-MAJOR SHAWSHEEN ST EAST BOSTON BOSTON HARBOR IN PROGRESS STARTED UNDER CWI11I577 MAJOR HARVARD ST (NORTH DORCHESTER) NEPONSET/MATTAPAN CANTERBURY BROOK IN PROGRESS STARTED UNDER CWI224D032 MAJOR N OF BEACON ST, ABOUT 800' E OF PARSONS ST ALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS COMPLETED02F120 MAJOR EASEMENT/WOLCOTT CT/HYDE PARK AVE EXT HYDE PARK NEPONSET RIVER IN PROGRESS04F204 MAJOR TRUMAN HWY/CHITTICK ST HYDE PARK NEPONSET RIVER IN PROGRESS05F117 MAJOR EASEMENT/TRUMAN HWY/WILLIAMS AVE HYDE PARK NEPONSET RIVER IN PROGRESS06D187 MAJOR EASEMENT/GROVE ST WEST ROXBURY BROOK GROVE ST CEMETERY IN PROGRESS06G108 MAJOR EASEMENT/WEST OF WOOD AVE EXT HYDE PARK NEPONSET RIVER IN PROGRESS07C006 MAJOR EASEMENT/VFW PARKWAY/BELLE AVE WEST ROXBURY CHARLES RIVER IN PROGRESS07H105 MAJOR EASEMENT/EDGEWATER/S RIVER ST NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS07H285 MAJOR BLUE HILL AVE NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS10L094 MAJOR EASEMENT/GALLIVAN BLVD (DAVENPORT) DORCHESTER NEPONSET RIVER VIA DAVENPORT BROOK IN PROGRESS12B124 MAJOR EASEMENT/LAGRANGE STREET WEST ROXBURY BROOK FARM BROOK IN PROGRESS18G233 NON-MAJOR X-COUNTRY BTN WILLOW POND RD AND JAMAICAWAY JAMAICA PLAIN MUDDY RIVER-LEVERETT POND IN PROGRESS19G043 MAJOR HUNTINGTON AVE ROXBURY/MISSION HILL MUDDY RIVER IN PROGRESS19G194 MAJOR SOUTH HUNTINGTON AVE ROXBURY/MISSION HILL MUDDY RIVER IN PROGRESS20DMH055 MANHOLE VILLAGE BROOK/STRATHMORE (TO BROOKLINE DRAINS) ALLSTON/BRIGHTON VILLAGE BROOK/STRATHMORE IN PROGRESS20G161 MAJOR EASEMENT/BROOKLINE AVE ROXBURY/MISSION HILL MUDDY RIVER IN PROGRESS21DMH319 MANHOLE VILLAGE BROOK/KILSYTH (TO BROOKLINE DRAINS) ALLSTON/BRIGHTON VILLAGE BROOK/KILSYTH IN PROGRESS21EMH064 MANHOLE TANNERY BROOK (TO BROOKLINE DRAINS) ALLSTON/BRIGHTON TANNERY BROOK IN PROGRESS24G035 MAJOR SOLDIERS FIELD ROAD/BABCOCK ST ALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS25E 037 MAJOR EASEMENT/TELFORD ST ALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS02F093 NON-MAJOR EASEMENT/SIERRA RD HYDE PARK NEPONSET RIVER IN PROGRESS03E 185 MAJOR NORTON ST HYDE PARK WETLANDS/NEPONSET RIVER IN PROGRESS03E 186 NON-MAJOR RIVER STREET HYDE PARK MILL POND/MOTHER BROOK IN PROGRESS03F056 MANHOLE WAKEFIELD AVENUE (DCR OF 03F159) HYDE PARK NEPONSET RIVER IN PROGRESS04E 069 MAJOR KNIGHT ST DAM HYDE PARK MOTHER BROOK IN PROGRESS04F090 MANHOLE FARADAY STREET (DCR OF 03F162) HYDE PARK NEPONSET RIVER IN PROGRESS05E 184 NON-MAJOR TURTLE POND PARKWAY HYDE PARK UNAMED WETLANDS IN PROGRESS05F244 NON-MAJOR HYDE PARK AVE BRIDGE HYDE PARK MOTHER BROOK/NEPONSET RIVER IN PROGRESS05F245 NON-MAJOR HYDE PARK AVE HYDE PARK MOTHER BROOK/NEPONSET RIVER IN PROGRESS05F253 MAJOR EASEMENT/BUSINESS ST, NEAR BUSINESS TER HYDE PARK MOTHER BROOK/NEPONSET RIVER IN PROGRESS05G112 MAJOR EASEMENT/RR ROW/WATER ST EXT HYDE PARK NEPONSET RIVER IN PROGRESS05G116A NON-MAJOR WARREN AVENUE HYDE PARK NEPONSET RIVER IN PROGRESS06G110 MAJOR EASEMENT/WEST STREET EXT HYDE PARK NEPONSET RIVER IN PROGRESS06G165 NON-MAJOR TRUMAN HWT/METROPOLITAN AVE HYDE PARK NEPONSET RIVER IN PROGRESS06G166 MAJOR 30' FROM GUARDRAIL NORTH SIDE OF TRUMAN HWY NEAR MILTON HYDE PARK NEPONSET RIVER IN PROGRESS06H107 NON-MAJOR EASEMENT/BELNEL RD HYDE PARK NEPONSET RIVER IN PROGRESS07H348 NON-MAJOR EDGEWATER DRIVE/TOPALIAN STREET NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS08B122 MAJOR EASEMENT/NORTH OF SPRING ST. WEST ROXBURY CHARLES RIVER IN PROGRESS08B126 NON-MAJOR SPRING STREET EXTENDED WEST ROXBURY CHARLES RIVER IN PROGRESS08E 031 NON-MAJOR TURTLE POND PARKWAY WEST ROXBURY TURTLE POND IN PROGRESS08I154 NON-MAJOR EASEMENT/RIVER ST/GLADESIDE AVE NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS08I156 NON-MAJOR EASEMENT/RIVER ST/MAMELON CIR NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS08J103 NON-MAJOR EASEMENT/CENTRAL AVE BRIDGE DORCHESTER NEPONSET RIVER IN PROGRESS08J49/50 MAJOR DESMOND RD DORCHESTER NEPONSET RIVER IN PROGRESS09K016 NON-MAJOR EASEMENT/BEARSE AVE EXT DORCHESTER NEPONSET RIVER IN PROGRESS09K101 NON-MAJOR EASEMENT/HUNTOON ST EXT DORCHESTER NEPONSET RIVER IN PROGRESS09L095 MAJOR GRANITE AVENUE DORCHESTER NEPONSET RIVER IN PROGRESS10B015 MAJOR EASEMENT/CHARLES RIVER ROAD WEST ROXBURY COW ISLAND POND/CHARLES RIVER IN PROGRESS10L096 MAJOR HILLTOP & LEXONDALE STS DORCHESTER NEPONSET RIVER IN PROGRESS11B123 MAJOR EASEMENT/EAST OF BAKER ST EXT. WEST ROXBURY BROOK FARM BROOK/CHARLES RIVERIN PROGRESS11M093 MAJOR NEPONSET AVE AT NW END OF NEPONSET AVE BRIDGE DORCHESTER NEPONSET RIVER IN PROGRESS12M091 MAJOR ERICSSON/WALNUT ST NEPONSET/MATTAPAN NEPONSET RIVER IN PROGRESS13D077/078 MAJOR WEST ROXBURY PKY/VFW PKY WEST ROXBURY BUSSEY BROOK IN PROGRESS13E 174 NON-MAJOR EASEMENT/VFW PARKWAY ROSLINDALE BUSSEY BROOK IN PROGRESS13E 175 MAJOR EASEMENT/VFW PKY ROSLINDALE BUSSEY BROOK IN PROGRESS13F011 NON-MAJOR ALLANDALE STREET ROSLINDALE BUSSEY BROOK IN PROGRESS23BMH089 MANHOLE HUNNEWELL AVE ALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS25D040 MAJOR ABOUT 390' N OF INTERSECTION OF SOLDIERS FIELD RD & WESTERALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS26G001 MAJOR SOLDIERS FIELD ROAD/EAST OF HARVARD UNIVERSITY ALLSTON/BRIGHTON CHARLES RIVER IN PROGRESS26K099 MAJOR CHELSEA ST EXT (JOINER ST) CHARLESTOWN CHARLES RIVER IN PROGRESS27J001 MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN MILLERS RIVER IN PROGRESS27L020 MAJOR PIER 4 EASEMENT - NAVY YARD CHARLESTOWN BOSTON INNER HARBOR IN PROGRESS2 - 14

Table 2-4Drainage Area Investigation Status2011OUTFALLNUMBER CATEGORY LOCATION NEIGHBORHOOD RECEIVING WATERSTATUS OFINVESTIGATION28K010 MAJOR OLD LANDING WAY EXT CHARLESTOWN LITTLE MYSTIC CHANNEL IN PROGRESS NEAR BEACH28K061 MAJOR EASEMENT/MEDFORD ST CHARLESTOWN LITTLE MYSTIC CHANNEL IN PROGRESS STARTED UNDER SBI28L073 NON-MAJOR EASEMENT/4TH ST - NAVY YARD CHARLESTOWN LITTLE MYSTIC CHANNEL IN PROGRESS STARTED UNDER CWI28L074/075/076 MAJOR 16TH ST/4TH AVE - NAVY YARD CHARLESTOWN LITTLE MYSTIC CHANNEL IN PROGRESS STARTED UNDER CWI228L077 NON-MAJOR EASEMENT/4TH ST - NAVY YARD CHARLESTOWN LITTLE MYSTIC CHANNEL IN PROGRESS COMPLETED29J129 MAJOR ALFORD STREET CHARLESTOWN MYSTIC RIVER IN PROGRESS29J212 MAJOR EASEMENT/MEDFORD ST(NEXT TO CSO 017) CHARLESTOWN MYSTIC RIVER IN PROGRESS29M049 MAJOR CONDOR STREET EAST BOSTON CHELSEA RIVER IN PROGRESS29P015 NON-MAJOR EASEMENT/BARNES AVE EAST BOSTON BELLE ISLE INLET IN PROGRESS30J030 MAJOR EASEMENT/ARLINGTON AVE CHARLESTOWN MYSTIC RIVER IN PROGRESS30P062 NON-MAJOR PALERMO AVE EXT EAST BOSTON WETLANDS IN PROGRESS31O004 NON-MAJOR EASEMENT/WALDEMAR AVE EAST BOSTON CHELSEA RIVER IN PROGRESS05C110 MAJOR EASEMENT/PLEASANTDALE ST EXT WEST ROXBURY CHARLES RIVER UNINVESTIGATED06D057 NON-MAJOR CEDAR CREST CIRCLE WEST ROXBURY CHARLES RIVER UNINVESTIGATED06D097 MAJOR EASEMENT/EDGEMERE ROAD WEST ROXBURY NONE SHOWN PENDING08C025/26 MAJOR WEDGEMERE ROAD WEST ROXBURY NONE SHOWN UNINVESTIGATED13E 176 NON-MAJOR EASEMENT/WELD ST ROSLINDALE NONE SHOWN UNINVESTIGATED15F288 MAJOR ARNOLD ARBORETUM/MURRAY CIRCLE JAMAICA PLAIN GOLDSMITH BROOK PENDING16L097 NON-MAJOR EASEMENT/OFF SAVIN HILL AVE DORCHESTER PATTEN'S COVE UNINVESTIGATED16L122 MAJOR MORRISSEY BLVD DORCHESTER DORCHESTER BAY UNINVESTIGATED17F012 NON-MAJOR FRANCIS PARKMAN DRIVE JAMAICA PLAIN JAMAICA POND UNINVESTIGATED17M033 MAJOR HARBOR POINT PARK (RELOCATED MT VERNON ST DRAIN DORCHESTER OLD HARBOR UNINVESTIGATED20DMH019 MANHOLE PRENDERGAST AVE ALLSTON/BRIGHTON MUDDY RIVER UNINVESTIGATED20G163 NON-MAJOR EASEMENT/RIVERWAY ROXBURY/MISSION HILL MUDDY RIVER UNINVESTIGATED20L081 NON-MAJOR EAST FIRST STREET SOUTH BOSTON RESERVED CHANNEL UNINVESTIGATED20L083 NON-MAJOR EAST FIRST STREET SOUTH BOSTON RESERVED CHANNEL UNINVESTIGATED21H039 NON-MAJOR FENWAY BOSTON PROPER MUDDY RIVER PENDING21H047 NON-MAJOR PALACE ROAD EXT BOSTON PROPER MUDDY RIVER PENDING21K069 MAJOR 125' NORTH OF W.FOURTH STREET (RELOCATED BY CA/T) BOSTON PROPER FORT POINT CHANNEL UNINVESTIGATED21M010 MAJOR D STREET EXTENDED SOUTH BOSTON RESERVED CHANNEL UNINVESTIGATED21M050 MAJOR SUMMER STREET SOUTH BOSTON RESERVED CHANNEL PENDING22L580 MAJOR NECCO STREET EXTENDED SOUTH BOSTON FORT POINT CHANNEL UNINVESTIGATED23H040 NON-MAJOR RALEIGH STREET EXT BOSTON PROPER CHARLES RIVER UNINVESTIGATED23H042 MAJOR DEERFIELD ST BOSTON PROPER CHARLES RIVER UNINVESTIGATED23L015 NON-MAJOR NORTHERN AVE SOUTH BOSTON BOSTON INNER HARBOR UNINVESTIGATED23L016 NON-MAJOR NORTHERN AVE SOUTH BOSTON BOSTON INNER HARBOR UNINVESTIGATED23L074 NON-MAJOR SUMMER ST BRIDGE SOUTH BOSTON FORT POINT CHANNEL UNINVESTIGATED23L075 MAJOR CONGRESS ST BRIDGE SOUTH BOSTON FORT POINT CHANNEL UNINVESTIGATED23L164 MAJOR CONGRESS ST BRIDGE BOSTON PROPER FORT POINT CHANNEL UNINVESTIGATED23L196 MAJOR NEW NORTHERN AVE BRIDGE SOUTH BOSTON FORT POINT CHANNEL UNINVESTIGATED23L202 MAJOR NORTHERN AVE SOUTH BOSTON BOSTON INNER HARBOR UNINVESTIGATED24L057 NON-MAJOR STATE STREET EXT BOSTON PROPER BOSTON INNER HARBOR UNINVESTIGATED24L233 MAJOR ROWE'S WHARF/ATLANTIC AVE BOSTON PROPER BOSTON HARBOR UNINVESTIGATED25L058 MAJOR CHRISTOPHER COLUMBUS PARK-WATERFRONT BOSTON PROPER BOSTON INNER HARBOR UNINVESTIGATED25L144 NON-MAJOR CLARK STREET BOSTON PROPER BOSTON INNER HARBOR UNINVESTIGATED26J052 NON-MAJOR MONSIGNOR O'BRIEN HWY BOSTON PROPER CHARLES RIVER UNINVESTIGATED26J055 NON-MAJOR LEVERETT CIRCLE BOSTON PROPER CHARLES RIVER UNINVESTIGATED26K035 MAJOR BEVERLY STREET NEAR WARREN BRIDGE BOSTON PROPER CHARLES RIVER UNINVESTIGATED26K052 NON-MAJOR COMMERCIAL STREET AT CHARTER ST. BOSTON PROPER CHARLES RIVER UNINVESTIGATED26K245 NON-MAJOR EASEMENT CHARLESTOWN CHARLES RIVER UNINVESTIGATED26L055 MAJOR NEAR BATTERY WHARF BOSTON PROPER BOSTON INNER HARBOR UNINVESTIGATED26L070 MAJOR HANOVER ST EXT BOSTON PROPER BOSTON INNER HARBOR UNINVESTIGATED26L084 MAJOR LEWIS STREET EAST BOSTON BOSTON INNER HARBOR UNINVESTIGATED27J044 MAJOR PRISON POINT BRIDGE CHARLESTOWN MILLERS RIVER UNINVESTIGATED27J096 MAJOR EASEMENT/INTERSTATE 93 CHARLESTOWN MILLERS RIVER UNINVESTIGATED28I015 MANHOLE ROLAND STREET CHARLESTOWN INTO SOMERVILLE UNINVESTIGATED29N015 MAJOR CHELSEA STREET EAST BOSTON CHELSEA RIVER UNINVESTIGATED30J006 MAJOR EASEMENT/ALFORD ST CHARLESTOWN MYSTIC RIVER UNINVESTIGATED30J019 MAJOR ALFORD ST CHARLESTOWN MYSTIC RIVER UNINVESTIGATED01E 024 MAJOR EASEMENT/LAKESIDE HYDE PARK SPRAGUE POND/NEPONSET RIVER IN PROGRESS01F031 MAJOR EASEMENT/MILLSTONE RD HYDE PARK NEPONSET RIVER COMPLETED02E 086 NON-MAJOR WEST MILTON STREET HYDE PARK UNAMED WETLANDS COMPLETED02F085 NON-MAJOR LAWTON STREET HYDE PARK NEPONSET RIVER RESERVATION COMPLETED03E 207 NON-MAJOR RIVER STREET HYDE PARK MILL POND/MOTHER BROOK COMPLETED04E064* NON-MAJOR ALVARDO AVE/RIVER ST BRIDGE HYDE PARK MILL POND/MOTHER BROOK COMPLETED04F016 NON-MAJOR EASEMENT RIVER ST HYDE PARK MOTHER BROOK/NEPONSET RIVER COMPLETED04F118 NON-MAJOR MASON STREET EXT. HYDE PARK NEPONSET RIVER COMPLETED04F119 MAJOR EASEMENT/HYDE PARK AVE/RESERVATION RD HYDE PARK NEPONSET RIVER COMPLETED04F189 MAJOR RESERVATION RD HYDE PARK MOTHER BROOK/NEPONSET RIVER COMPLETED04F203 NON-MAJOR GLENWOOD AVE HYDE PARK NEPONSET RIVER COMPLETED05E180* NON-MAJOR GEORGETOWN DRIVE HYDE PARK NONE SHOWN/CHARLES RIVER COMPLETED05E181* NON-MAJOR GEORGETOWN DRIVE HYDE PARK NONE SHOWN/CHARLES RIVER COMPLETED05E182* NON-MAJOR DEDHAM STREET HYDE PARK UNNAMED STREAM/CHARLES RIVER COMPLETED2 - 15

Table 2-4Drainage Area Investigation Status2011OUTFALLNUMBER CATEGORY LOCATION NEIGHBORHOOD RECEIVING WATERSTATUS OFINVESTIGATION05E183* NON-MAJOR GEORGETOWN PLACE/DEDHAM ST HYDE PARK UNNAMED STREAM COMPLETED05F254 NON-MAJOR DANA AVENUE HYDE PARK NEPONSET RIVER COMPLETED05G115 MAJOR FAIRMOUNT AVE BRIDGE (NORTH BANK) HYDE PARK NEPONSET RIVER COMPLETED05G116 NON-MAJOR FAIRMOUNT AVE BRIDGE (SOUTH BANK) HYDE PARK NEPONSET RIVER COMPLETED06D083* NON-MAJOR MARGETTA DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED06D084* NON-MAJOR EASEMENT/MARGARETTA DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED06D085* NON-MAJOR GEORGETOWN DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED06D086* NON-MAJOR GEORGETOWN DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED NEAR BEACH06D091* NON-MAJOR GEORGETOWN DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED STARTED UNDER SBI06D184* NON-MAJOR GEORGETOWN DRIVE WEST ROXBURY WETLANDS/CHARLES RIVER COMPLETED STARTED UNDER CWI06F233* NON-MAJOR MOUNT ASH ROAD HYDE PARK WETLAND - STONY BROOK RESERVATION COMPLETED STARTED UNDER CWI206G109 MAJOR RIVER TER EXT, NEAR ROSA ST HYDE PARK NEPONSET RIVER COMPLETED06G111 NON-MAJOR EASEMENT/VOSE ST EXT., TRUMAN HWY HYDE PARK NEPONSET RIVER COMPLETED COMPLETED06H106 NON-MAJOR OSCEOLA STREET HYDE PARK NEPONSET RIVER COMPLETED07H287 NON-MAJOR RIVER STREET/EDGEWATER DRIVE NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED07H346 NON-MAJOR EDGEWATER DRIVE/HOLMFIELD AVE HYDE PARK NEPONSET RIVER COMPLETED07H347 NON-MAJOR EDGEWATER DRIVE/BURMAH ROAD NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08E033* NON-MAJOR TURTLE POND PARKWAY WEST ROXBURY TURTLE POND COMPLETED08E035* NON-MAJOR WASHINGTON STREET WEST ROXBURY TURTLE POND COMPLETED08I153 NON-MAJOR DUXBURY ROAD NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08I155 NON-MAJOR EASEMENT/RIVER ST/MAMELON CIR NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08I158 NON-MAJOR EASEMENT/RIVER ST/FREMONT ST NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08I207 NON-MAJOR MEADOWBANK AVE EXT NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08I209 NON-MAJOR MEADOWBANK AVE EXT NEPONSET/MATTAPAN NEPONSET RIVER COMPLETED08J041 NON-MAJOR RIVER STREET DORCHESTER NEPONSET RIVER COMPLETED08J102 NON-MAJOR ADAMS STREET DORCHESTER NEPONSET RIVER COMPLETED08K049 NON-MAJOR BEARSE AVENUE DORCHESTER NEPONSET RIVER COMPLETED09B049 MAJOR EASEMENT/RIVERMOOR ST WEST ROXBURY COW ISLAND POND/CHARLES RIVER COMPLETED09E229* NON-MAJOR GRANDVIEW STREET WEST ROXBURY NONE SHOWN COMPLETED09E243* NON-MAJOR BLUE LEDGE TR/EASEMENT WEST ROXBURY UNNAMED STREAM COMPLETED09K100 MAJOR EASEMENT/MELLISH RD DORCHESTER NEPONSET RIVER COMPLETED11G318* NON-MAJOR CULVERT UNDER WALK HILL STREET ROSLINDALE CANTERBURY BROOK COMPLETED11G319* NON-MAJOR CULVERT UNDER WALK HILL STREET ROSLINDALE CANTERBURY BROOK COMPLETED12B010 NON-MAJOR BAKER STREET WEST ROXBURY BROOK FARM BROOK COMPLETED12B014 NON-MAJOR BAKER STREET WEST ROXBURY BROOK FARM BROOK COMPLETED12B031 NON-MAJOR EASEMENT/BAKER STREET WEST ROXBURY BROOK FARM BROOK COMPLETED12B033 NON-MAJOR EASEMENT/BAKER STREET WEST ROXBURY BROOK FARM BROOK COMPLETED12F305* NON-MAJOR EASEMENT/ARBOROUGH ROAD ROSLINDALE UNAMED WETLANDS COMPLETED12F418* NON-MAJOR EASEMENT/WALTER STREET (renumbered from 12F322) ROSLINDALE NONE SHOWN COMPLETED12H085* NON-MAJOR MORTON STREET ROSLINDALE CANTERBURY BROOK COMPLETED12H087* NON-MAJOR MORTON STREET ROSLINDALE CANTERBURY BROOK COMPLETED12H092* MAJOR AMERICAN LEGION HIGHWAY MATTAPAN CANTERBURY BROOK COMPLETED12L092 MAJOR PINE NECK CREEK/TENEAN ST WEST OF LAWLEY DORCHESTER NEPONSET RIVER COMPLETED13B011 NON-MAJOR LAGRANGE STREET WEST ROXBURY UNNAMED STREAM COMPLETED13F093 NON-MAJOR WALTER STREET ROSLINDALE BUSSEY BROOK COMPLETED13F095 NON-MAJOR EASEMENT/BUSSEY STREET ROSLINDALE BUSSEY BROOK COMPLETED14C009 MAJOR EASEMENT/WESTGATE RD WEST ROXBURY UNNAMED WETLANDS COMPLETED19G199 NON-MAJOR JAMAICA WAY ROXBURY/MISSION HILL MUDDY RIVER COMPLETED21C212 NON-MAJOR EASEMENT/LAKE SHORE ROAD ALLSTON/BRIGHTON CHANDLER POND COMPLETED21EMH086 MANHOLE VILLAGE BROOK/CUMMINGS (TO BROOKLINE DRAINS) ALLSTON/BRIGHTON VILLAGE BROOK/KILSYTH COMPLETED21H048 NON-MAJOR EASEMENT/FENWAY/EVANS WAY BOSTON PROPER MUDDY RIVER COMPLETED21H201 NON-MAJOR PALACE ROAD EXT BOSTON PROPER MUDDY RIVER COMPLETED22C384 MAJOR EASEMENT/LAKE SHORE RD ALLSTON/BRIGHTON CHANDLER POND COMPLETED23G132 MAJOR EASEMENT/MASS TURNPIKE/WEST OF BU BRIDGE ALLSTON/BRIGHTON CHARLES RIVER COMPLETED23L195 MAJOR NORTHERN AVE SOUTH BOSTON BOSTON INNER HARBOR COMPLETED24C174 NON-MAJOR EASEMENT/NEWTON STREET ALLSTON/BRIGHTON CHARLES RIVER COMPLETED24CMH014 MANHOLE NEWTON ST ALLSTON/BRIGHTON CHARLES RIVER COMPLETED24D150 MAJOR SOLDIERS FIELD PLACE ALLSTON/BRIGHTON CHARLES RIVER COMPLETED24G034 MAJOR SOLDIERS FIELD ROAD, S OF CAMBRIDGE ST ALLSTON/BRIGHTON CHARLES RIVER COMPLETED25G006 NON-MAJOR FROM WESTERN AVE BRIDGE ALLSTON/BRIGHTON CHARLES RIVER COMPLETED25G041 NON-MAJOR SOLDIERS FIELD RD/NORTH OF WESTERN AVE BRIDGE ALLSTON/BRIGHTON CHARLES RIVER COMPLETED26F038 MAJOR HARVARD ST EXT ALLSTON/BRIGHTON CHARLES RIVER COMPLETED28K386 MAJOR EASEMENT/TERMINAL ST CHARLESTOWN LITTLE MYSTIC CHANNEL COMPLETED29J029 NON-MAJOR ALFORD STREET/RYAN PLGD. EXT CHARLESTOWN MYSTIC RIVER COMPLETED29N135 MAJOR ADDISON ST EAST BOSTON CHELSEA RIVER COMPLETED30P107 NON-MAJOR WALDEMAR AVENUE EAST BOSTON WETLANDS COMPLETED31P084 NON-MAJOR EASEMENT/BENNINGTON ST EAST BOSTON BELLE ISLE INLET, REVERE COMPLETED2 - 16

it is added to a Commission construction contract for correction. After the illegalconnection is corrected, a post correction check of the drain is performed using similarinvestigative procedures. This ensures that no sources of contamination are missed.Because upstream contamination sources influence downstream results, inspections ofstorm drains immediately downstream of illegal connections are suspended until thesources of contamination are eliminated. To continue making progress, field crews shifttheir investigations to other areas.In a few isolated cases, despite having dye tested all buildings adjacent to a contaminatedstretch of drain, no illegal connections are identified. The Commission refers to thesecases as “anomalies”. Anomalies involve additional investigative measures, such as jetcleaning the drain and re-inspecting the contaminated manhole; dye testing differentfixtures in buildings already dye tested; inspecting and sandbagging manholes locatedfurther upstream and downstream of the contaminated stretch; dye testing buildingslocated further upstream and downstream of the contaminated stretch; and inspecting thecontaminated drain and adjacent sewer with a video camera, to determine if there are anystructural defects possibly allowing cross contamination.Causes of anomalies vary, but may include: connection of a single fixture, such as awashing machine, to an internal building drain (the rest of the plumbing in the building isproperly connected to the sewer system); a contamination source located further upstreamor downstream of the stretch where the contamination was originally observed; defects inthe main drain and sewer allowing sanitary sewage to enter the storm drain.Occasionally, upon re-inspecting or sandbagging a manhole, contamination is no longerevident. In these cases crews are allowed to move investigations downstream, althoughrecords of the anomaly are maintained in the event that the contamination reappears.If crews are unsuccessful in locating the source of contamination, if the property owner isrequired to pay for and correct a problem, if a special engineering design or capitalimprovement is needed to repair or redirect pipes, then downstream progress can beimpeded. Wet weather and the winter snow and ice season also delay progress, sincemanhole inspections and sandbagging must be performed during dry weather. Delaysoccur when debris, sediments, blockages or standing water are encountered in drains,since these hinder visual inspections and can prevent the use of sandbags.In order to advance progress downstream of contaminated storm drains, field crews mayemploy “work around methods”. For example, sandbags might be temporarily installedin manholes immediately downstream of a contaminated stretch of storm drain to blockthe contaminated flow. Then dry weather manhole inspections can proceed downstream.Crews may perform spot inspections of manholes several manholes downstream of acontaminated section, to determine if there is any visual or olfactory evidence ofcontaminated flow. In some areas, all buildings immediately downstream of knowncontamination source are dye tested. Although these work around methods are not as2 - 17

thorough as the sandbag method in finding illegal connections, their use enables theCommission to advance work progress downstream in some areas.2.6 CORRECTION OF ILLEGAL CONNECTIONSa. Corrections under BWSC ContractsThe Commission’s annual Capital Improvement Program includes funding for theelimination of illegal connections by a private contractor. Once an illegal connection isconfirmed, information about the illegal connection, including maps and record plans ofthe sewer and drains in the street, are forwarded to the Commission’s ConstructionDivision for correction under the Commission’s illegal connection repair contract.b. Corrections Required by OwnersIn some cases, the owner of the property is responsible for correcting the illegalconnection. For example, in some buildings only part of the plumbing (e.g. a washingmachine in the basement or one bathroom or toilet) is connected to an internal buildingdrain, while the rest of the plumbing fixtures in the building are properly connected to thebuilding sewer. Another example is where the plumbing in the building is at a lowerelevation than the sewer in the street. In those cases an ejector pump may be needed inorder to allow discharge to the sewer. The Commission will reimburse owners up to$7,500 to install an ejector pump.c. Corrections Requiring Engineering DesignsIllegal connection corrections that prove particularly challenging are those that require anengineering design to correct. If the correction involves reconfiguration of the sewerand/or the drain in the street, the Commission may take responsibility for the design andcorrection. But in other cases, where significant changes to internal plumbing orprivately owned infrastructure are necessary, the owner must cover the cost of the designand construction of the correction. These types of corrections can be very complex andmay require a long time to perform inspections, prepare designs and obtain permits fromother agencies.2.7 2011 ILLEGAL CONNECTION REMEDIATION SUMMARYIn 2011, sixty-nine (69) new illegal connections were identified, and seventy-two (72)illegal connections were corrected. Thirty-three (33) illegal connections remaineduncorrected at the end of 2011.The Commission estimates the wastewater removed by elimination of an illegalconnection based upon water use records for the property where the illegal connectionwas corrected. Average daily water consumption is calculated based on the previous 24month period, and 90 percent of the water use is assumed to discharge to the sewer2 - 18

system. If only a portion of the building contributed to the illegal connection, the figureis adjusted accordingly.Due to the Commission’s efforts in 2011, an estimated 18,427 gallons per day (gpd) ofwastewater was removed from the storm drainage system and receiving waters. Of thisamount, approximately 11,744 gpd was from residential and multi-family properties,while 6,683 gpd was from businesses or institutions. Between 1986 and the end of 2011,1,165 illegal connections were corrected and an estimated total of 594,276 gallons ofwastewater per day was removed from the storm drainage system and receiving waters asa result of the Commission’s illegal connection remediation programs.In 2011, the Commission spent $375,631 under illegal connection correction constructioncontracts to correct 45 illegal connections 2 , for an average cost of $8,347. This cost doesnot include the cost of permits, inspection fees, pavement restoration or police details,and it does not include the cost to property owners who were responsible for makingcorrections on their own property.2011 Illegal Connection Remediation Program SummaryIllegal Connections Listed January 1, 2011........................................................36Illegal Connections Identified in 2011................................................................69Illegal Connections Corrected in 2011 ...............................................................72Illegal Connections Outstanding December 31, 2011 ........................................33Tables 2-5 through 2-8 provide more detailed information on the Commission’s IllegalConnection Remediation Program.Table 2-5: Table 2-5 lists the location of illegal connections that existed at the end of2010 and into 2011, including the dates of confirming dye tests, and the receiving waters.Table 2-6: Table 2-6 lists the illegal connections identified during 2011. Sixty-nine (69)illegal connections were identified in 2011, forty-three (43) of which were corrected in2011.Table 2-7: Table 2-7 lists all of the illegal connections corrected in 2011. There wereseventy-two (72) illegal connections corrected in 2011. Of those corrected, forty-seven(47) were corrected by a Commission contractor and twenty-four (24) were corrected bythe owner. One (1) previously identified illegal connection was determined to be theresult of defects in the sewer and drain pipes in the street. The defective sewer and drainpipes were replaced in 2011.2 Cost for correction of two illegal connections were not included in this total since they were corrected inthe course of other construction projects and costs were not available.2 - 19

Table 2-8: Table 2-8 shows the illegal connections that remained to be corrected as ofthe end of 2011. At the end of 2011, there were thirty-three (33) outstanding illegalconnections. Of those, eight (8) have been included in a Commission contract forcorrection. Nineteen (19) illegal connections must be corrected by their owners and legalaction is being pursued. The Commission will performing additional investigative workand work with the owners of six (6) properties in regards to illegal connections on theirproperties.2 - 20

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-5: Illegal Connections Outstanding as of January 1, 2011Address Neighborhood Bldg type Date Identified Outlet Num Receiving Water Status at End of 20104 Arbella Road Dorchester R-1 17-Oct-06 DO 10L 094 Neponset River Corrected by Owner375 Baker Street West Roxbury R-1 30-Jun-09 DO 11B 123 Charles River Corrected by Owner656 Bennington Street East Boston R-3 08-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) Corrected by Owner752 Bennington Street East Boston Comm 30-Sep-10 DO 29O 001 Boston Harbor (Constitution Beach) Corrected under BWSC contract50 Binney Street Fenway Exempt 28-May-08 DO 21H 047 Muddy River to Charles River Corrected by BWSC and Owner22 Birchcroft Road Hyde Park R-1 28-Dec-07 DO 06G 108 Neponset River Internal issue; Referred to Legal to Notify Owner1082 Canterbury Street Roslindale R-2 18-Oct-06 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued15 Conry Crescent Jamaica Plain R-1 22-Jun-99 DO 15F288 Charles River (Stony Brook Conduit) Corrected under BWSC contract334 Corey Street West Roxbury R-1 18-Jan-10 DO 12B 124 Charles River (Brook Farm Brook) Corrected by Owner39 Englewood Avenue Brighton Condo 12-Feb-08 DMH 20D 055 Muddy River (via Brookline/Village Brook) Illegal sink was corrected by Owner9 Farquhar Street Roslindale R-2 12-Jan-05 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract83 Farrar Avenue Hyde Park R-1 07-Oct-09 DO 06G 108 Neponset River Corrected by Owner108 Faywood Avenue East Boston R-2 18-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) Corrected by Owner49 Firth Road Roslindale R-2 13-Nov-01 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued58-60 Gallivan Boulevard Dorchester R-2 02-Dec-10 DO 10L 094 Neponset River Corrected under BWSC contract66-68 Gallivan Boulevard Dorchester R-2 27-Jun-10 DO 10L 094 Neponset River (Davenport Brook) Corrected under BWSC contract108 Gardner Street West Roxbury R-1 15-Jun-10 DO 10B 015 Charles River Corrected by Owner125 Garfield Street Hyde Park Exempt 07-Jul-08 DO 04F 204 Neponset River BHA has been notified and committed to correction in 1st quarter 201211 Glenhill Road Mattapan R-1 14-Jan-10 DO 07H 285 Neponset River Corrected by Owner197 Hamilton Street Dorchester R-4 21-Oct-09 DO 13L 090 Dorchester Bay Corrected by Owner15 Hollywood Road West Roxbury R-1 02-Dec-10 DO 13D 077/078 Charles River (Bussey Brook) Corrected under BWSC contract284 Huntington Avenue Hyde Park R-1 31-Oct-00 OF 23I 023* Charles River (Stony Brook Conduit) Determined to be a problem in the main sewer pipe27 Irma Street Dorchester R-3 19-Nov-07 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brk) Internal issue; Mortgage forclosed; bank has been notified97 Kilsyth Road Brighton R-3 13-Feb-08 DMH 21D 219 Muddy River (via Brookline/Village Brook) Corrected under BWSC contract99 Kilsyth Road Brighton R-3 21-Feb-08 DMH 21D 219 Muddy River (via Brookline/Village Brook) Corrected under BWSC contract51-53 Mapleton Street Brighton R-2 27-Dec-07 DO 24D 032 Charles River Corrected by Owner71 Maryknoll Street Mattapan R-1 04-Jan-10 DO 10L 094 Neponset River (Davenport Brook) Corrected by Owner1 President Road West Roxbury R-1 09-Sep-10 DO 13E 174 Charles River (Bussey Brook) Corrected by Owner1459-1461 River Street Hyde Park Comm 01-Jun-10 DO 04F 189 Neponset River Corrected under BWSC contract28 Ruskindale Road Mattapan R-1 11-Jun-10 DO 06G 108 Neponset River Additional investigation needed126 Sanborn Avenue West Roxbury R-1 04-Nov-09 DO 11B 123 Charles River Corrected by Owner953 Saratoga Street East Boston R-3 28-Jan-10 DO 29O 001 Boston Harbor (Constitution Beach) Corrected by Owner41 Saybrook Street Brighton R-1 23-Feb-10 DO 24D 032 Charles River Corrected by Owner25 Warren Street Brighton School 27-Jun-08 DO 25E 037 Charles River School Dept. has prepared plan; plans to correct 1st quarter 2012214 Weld Street West Roxbury R-1 11-Nov-10 DO 13E 174 Charles River (Bussey Brook) Corrected under BWSC contract365 Western Avenue Brighton Comm 08-Oct-09 DO 25E 037 Charles River Corrected under BWSC contract* MWRA Outfall 2 - 21

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-6: Illegal Connections Identified in 2011Address District Bldg type Date Identified Outlet Num Receiving Water Status at end of 201192 Annafran Street Mattapan R-1 22-Feb-11 DO 7H 105 Neponset River Corrected under BWSC contract35 Arborfield Road Roslindale R-1 07-Feb-11 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued54 Arborfield Road Roslindale R-1 07-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit) Additional investigation needed6 Belnel Road Mattapan R-1 21-Nov-11 DO 06H 107 Neponset River Included in BWSC correction contract58 Birchcroft Road Mattapan R-1 21-Sep-11 DO 06G 108 Neponset River Corrected under BWSC contract1106 Blue Hill Avenue Dorchester Comm 28-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Corrected under BWSC contract1589-1593 Blue Hill Avenue Mattapan Comm 18-Oct-11 DO 07H 285 Neponset River Internal issue; Enforcement Notice Issued972-974 Blue Hill Avenue Dorchester Indus 13-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Additional investigation needed59 Brayton Road Brighton R-1 22-Jun-11 DO 24D 032 Charles River Corrected under BWSC contract32 Brighton Avenue Brighton Comm 30-Jun-11 DO 24G 035 Charles River Corrected by Owner10 Brookley Road Jamaica Plain Comm 04-May-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract70-72 Burton Street Brighton R-2 29-Jan-11 MH 24C 014 Charles River Corrected under BWSC contract124 Capen Street Dorchester R-3 04-Oct-11 DO 07H 285 Neponset River Corrected under BWSC contract55 Charme Avenue Roslindale R-1 29-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract8 Chipman Street Dorchester R-3 22-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner50 Colonial Avenue Dorchester R-3 19-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner44 Colorado Street Mattapan R-1 18-Oct-11 DO 07H 105 Neponset River Corrected under BWSC contract1079 Commonwealth Avenue Brighton Apt 28-Jun-11 DO 24G 035 Charles River Corrected by Owner17 Conry Crescent Jamaica Plain R-1 16-Sep-11 DO 15F 288 Charles River (Stony Brook Conduit, Goldsmith Brook) Corrected under BWSC contract305-307 Corey Street West Roxbury R-2 07-Dec-11 DO 12B 124 Charles River (Brook Farm Brook) Internal issue; Enforcement Notice Issued35 Cranmore Road Hyde Park R-1 01-Nov-11 DO 03F 159 Neponset River Corrected under BWSC contract122 Dustin Street Brighton Apt 20-Oct-11 DO 25E 037 Charles River Corrected under BWSC contract67 Eastland Road Jamaica Plain R-1 19-May-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract33 Edwardson Street Hyde Park R-1 07-Dec-11 DO 06G 108 Neponset River Internal issue; Enforcement Notice Issued34 Edwardson Street Hyde Park R-1 26-Sep-11 DO 06G 108 Neponset River Corrected by Owner85 Elm Hill Avenue Roxbury R-1 07-Dec-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract39 Englewood Avenue Brighton Condo 13-Oct-11 DMH 20D 055 Muddy River (via Brookline/Village-Strathmore) New illegal connection found-Owner has been notified112 Faywood Avenue East Boston R-1 22-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) Corrected under BWSC contract271 Fuller Street Dorchester R-3 28-Oct-11 DO 07H 285 Neponset River Corrected by Owner102 Gardner Street West Roxbury R-1 09-May-11 DO 10B 015 Charles River Corrected under BWSC contract66 Gardner Street West Roxbury R-1 16-May-11 DO 08B 122 Charles River Corrected under BWSC contract59 Glencliff Road Roslindale R-1 08-Jun-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract27 Halsey Road Hyde Park R-1 27-Dec-11 DO 03F 159 Neponset River Included in BWSC correction contract58-60 Hemenway Street Fenway Comm 13-May-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected by Owner2 Highfield Terrace Roslindale R-1 17-Aug-11 OF 23I 023* Charles River (Stony Brook Conduit) Additional investigation needed69 Homer Street East Boston R-3 29-Nov-11 DO 28N 207 Boston Harbor Internal issue; Enforcement Notice Issued167 Homestead Street Roxbury Apt 07-Dec-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract273 Huntington Avenue Hyde Park R-2 23-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued277 Huntington Avenue Hyde Park R-2 22-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) Included in BWSC correction contract293 Huntington Avenue Hyde Park R-2 21-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract18 Keane Road West Roxbury R-1 15-Feb-11 DO 12B 124 Charles River (Brook Farm Brook) Corrected under BWSC contract47 Margo Road Brighton R-1 23-May-11 DO 24D 032 Charles River Corrected under BWSC contract224-232 Market Street Brighton Comm 31-May-11 DO 24D 032 Charles River Additional investigation needed21 Mascot Street Dorchester R-2 21-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract39 Mercier Avenue Dorchester R-1 29-Apr-11 DO 10L 094 Neponset River (Davenport Brook) Corrected under BWSC contract95 Montclair Avenue West Roxbury R-2 02-Jun-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract61 Morrell Street West Roxbury R-1 05-Oct-11 DO 07C 006 Charles River Internal issue; Referred to Legal to Notify Owner70 Norwell Street Dorchester Apt 22-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract31 Pinewood Street Mattapan R-1 21-Sep-11 DO 06G 108 Neponset River Corrected under BWSC contract*MWRA Outfall 2 - 22

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-6: Illegal Connections Identified in 2011Address District Bldg type Date Identified Outlet Num Receiving Water Status at end of 201177 Presentation Road Brighton R-1 25-Feb-11 MH 24C 014 Charles River Corrected under BWSC contract2 Regan Road Dorchester R-1 29-Apr-11 DO 10L 094 Neponset River (Davenport Brook) Corrected under BWSC contract26 Regina Road Dorchester R-3 05-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Enforcement Notice Issued27 Rendall Road West Roxbury R-1 19-Apr-11 DO 13D 077/078 Charles River (Bussey Brook) Additional investigation needed71 Robin Street West Roxbury R-1 02-Aug-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract5 Ryder Hill Road Brighton R-1 30-Nov-11 DO 24D 032 Charles River Included in BWSC correction contract7 School Street Charlestown R-1 04-Jul-11 DO 27J 001 Charles River (Millers River) Corrected under BWSC contract954 South Street Roslindale R-2 22-Apr-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract77 Standard Street Mattapan R-1 05-May-11 DO 08J 050/049 Neponset River Corrected under BWSC contract87 Standard Street Mattapan R-2 13-Jan-11 DO 08J 050/049 Neponset River Corrected under BWSC contract32 Supple Road Dorchester R-2 14-Jul-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Corrected under BWSC contract35 Tennis Road Mattapan R-2 13-May-11 DO 07H 285 Neponset River Corrected under BWSC contract53 Van Brunt Street Hyde Park R-1 01-Nov-11 DO 03F 159 Neponset River Corrected by Owner267 Wachusett Street Jamaica Plain R-1 20-May-11 OF 23I 023* Charles River (Stony Brook Conduit) Corrected under BWSC contract587-605 Washington Street Dorchester Comm 13-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner583 Weld Street West Roxbury R-2 03-Dec-11 DO 12B 124 Charles River (Brook Farm Brook) Internal issue; Enforcement Notice Issued54 West Tremlett Street Dorchester R-3 05-Jul-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Corrected under BWSC contract53A Wildwood Street Dorchester R-1 29-Apr-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Corrected under BWSC contract40 Woolson Street Mattapan R-3 04-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Corrected by Owner189 Wordsworth Street East Boston R-2 23-May-11 DO 28O 025 Boston Harbor Corrected under BWSC contract*MWRA Outfall 2 - 23

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-7: Illegal Connections Corrected in 2011Address District Bldg type Date Identified Outlet Num Receiving Water Date correctedSewage Rem# 1 Status92 Annafran Street Mattapan R-1 22-Feb-11 DO 7H 105 Neponset River 20-Jun-11 164.32 Corrected under BWSC contract4 Arbella Road Dorchester R-1 17-Oct-06 DO 10L 094 Neponset River 01-Jan-12 14.77 Corrected by owner375 Baker Street West Roxbury R-1 30-Jun-09 DO 11B 123 Charles River (Wetland near West Roxbury High) 17-Aug-11 45.11 Corrected by owner752 Bennington Street East Boston Comm 30-Sep-10 DO 29O 001 Boston Harbor (Constitution Beach) 26-Jul-11 473.22 Corrected by owner656 Bennington Street East Boston R-3 08-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) 22-Sep-11 44.42 Corrected by owner50 Binney Street Fenway/Kenmore Exempt 28-May-08 DO 21H 047 Muddy River (Fens) to Charles River 25-Feb-11 538.13 Corrected under BWSC contract58 Birchcroft Road Mattapan R-1 21-Sep-11 DO 06G 108 Neponset River 21-Nov-11 56.52 Corrected under BWSC contract1106 Blue Hill Avenue Dorchester Comm 28-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) 18-Aug-11 307.63 Corrected under BWSC contract59 Brayton Road Brighton R-1 22-Jun-11 DO 24D 032 Charles River 07-Oct-11 182.63 Corrected under BWSC contract32 Brighton Avenue Brighton Comm 30-Jun-11 DO 24G 035 Charles River 29-Sep-11 732.50 Corrected by owner10 Brookley Road Jamaica Plain Comm 04-May-11 OF 23I 023* Charles River (Stony Brook Conduit) 03-Sep-11 56.84 Corrected under BWSC contract70-72 Burton Street Brighton R-2 29-Jan-11 MH 24C 014 Charles River 25-Apr-11 106.52 Corrected under BWSC contract124 Capen Street Dorchester R-3 04-Oct-11 DO 07H 285 Neponset River 08-Dec-11 430.73 Corrected under BWSC contract55 Charme Avenue Roslindale R-1 29-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit) 27-Jun-11 88.73 Corrected under BWSC contract44 Colorado Street Mattapan R-1 18-Oct-11 DO 07H 105 Neponset River 30-Nov-11 107.41 Corrected under BWSC contract1079 Commonwealth Avenue Brighton Apt 28-Jun-11 DO 24G 035 Charles River 29-Sep-11 249.17 Corrected by owner15 Conry Crescent Jamaica Plain R-1 22-Jun-99 DO 15F 288 Charles River (Stony Brook Conduit, Goldsmith Brook) 16-Sep-11 84.32 Corrected under BWSC contract17 Conry Crescent Jamaica Plain R-1 16-Sep-11 DO 15F 288 Charles River (Stony Brook Conduit, Goldsmith Brook) 16-Sep-11 84.87 Corrected under BWSC contract334 Corey Street West Roxbury R-1 18-Jan-10 DO 12B 124 Charles River (Brook Farm Brook) 28-Sep-11 13.50 Corrected by owner35 Cranmore Road Hyde Park R-1 01-Nov-11 DO 03F 159 Neponset River 19-Dec-11 46.13 Corrected under BWSC contract122 Dustin Street Brighton Apt 20-Oct-11 DO 25E 037 Charles River 09-Dec-11 3308.03 Corrected under BWSC contract67 Eastland Road Jamaica Plain R-1 19-May-11 OF 23I 023* Charles River (Stony Brook Conduit) 12-Sep-11 92.55 Corrected under BWSC contract34 Edwardson Street Hyde Park R-1 26-Sep-11 DO 06G 108 Neponset River 09-Dec-11 7.78 Corrected by owner39 Englewood Avenue Allston/Brighton Condo 12-Feb-08 DMH 20D 055 Muddy River (via Brookline/Village-Strathmore) 13-Oct-11 37.87 Corrected by owner9 Farquhar Street Roslindale R-2 12-Jan-05 OF 23I 023* Charles River (Stony Brook Conduit) 01-Nov-11 263.70 Corrected under BWSC contract83 Farrar Avenue Hyde Park R-1 07-Oct-09 DO 06G 108 Neponset River 07-Sep-11 11.44 Corrected by owner108 Faywood Avenue East Boston R-2 18-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) 16-Aug-11 24.38 Corrected by owner112 Faywood Avenue East Boston R-1 22-Nov-10 DO 29O 001 Boston Harbor (Constitution Beach) 25-Jul-11 156.42 Corrected under BWSC contract271 Fuller Street Dorchester R-3 28-Oct-11 DO 07H 285 Neponset River 30-Nov-11 32.56 Corrected by owner58-60 Gallivan Boulevard Dorchster R-2 02-Dec-10 DO 10L 094 Neponset River (Davenport Brook) 11-Apr-11 238.13 Corrected under BWSC contract66-68 Gallivan Boulevard Dorchester R-2 27-Jun-10 DO 10L 094 Neponset River (Davenport Brook) 08-Apr-11 152.25 Corrected under BWSC contract108 Gardner Street West Roxbury R-1 15-Jun-10 DO 10B 015 Charles River 23-Aug-11 10.00 Corrected by owner102 Gardner Street West Roxbury R-1 09-May-11 DO 10B 015 Charles River 15-Jul-11 188.16 Corrected under BWSC contract66 Gardner Street West Roxbury R-1 16-May-11 DO 08B 122 Charles River 11-Jul-11 143.03 Corrected under BWSC contract59 Glencliff Road Roslindale R-1 08-Jun-11 OF 23I 023* Charles River (Stony Brook Conduit) 26-Aug-11 146.00 Corrected under BWSC contract11 Glenhill Road Mattapan R-1 14-Jan-10 DO 07H 285 Neponset River 06-Sep-11 28.63 Corrected by owner197 Hamilton Street Dorchester R-4 21-Oct-09 DO 13L 090 Neponset River/Dorchester Bay 01-Nov-11 16.00 Corrected by owner58-60 Hemenway Street Fenway Comm 13-May-11 OF 23I 023* Charles River (Stony Brook Conduit) 07-Oct-11 2372.40 Corrected by owner15 Hollywood Road West Roxbury R-1 02-Dec-10 DO 13D 077/078 Charles River (Bussey Brook) 31-Mar-11 106.69 Corrected under BWSC contract284 Huntington Avenue Hyde Park R-1 31-Oct-00 OF 23I 023* Charles River (Stony Brook Conduit) 21-Nov-11 0.00 Determined to be a problem in the main sewer pipe293 Huntington Avenue Hyde Park R-2 21-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) 21-Nov-11 266.98 Corrected under BWSC contract18 Keane Road West Roxbury R-1 15-Feb-11 DO 12B 124 Charles River (Brook Farm Brook) 21-Jun-11 21.90 Corrected under BWSC contract99 Kilsyth Road Allston/Brighton R-3 21-Feb-08 DMH 21D 319 Muddy River (via Brookline/Village-Kilsyth) 24-Mar-11 445.96 Corrected under BWSC contract97 Kilsyth Road Allston/Brighton R-3 13-Feb-08 DMH 21D 319 Muddy River (via Brookline/Village-Kilsyth) 24-Mar-11 405.07 Corrected under BWSC contract51-53 Mapleton Street Brighton R-2 27-Dec-07 DO 24D 032 Charles River 13-Apr-11 189.80 Corrected by owner47 Margo Road Brighton R-1 23-May-11 DO 24D 032 Charles River 29-Sep-11 176.40 Corrected under BWSC contract71 Maryknoll Street Mattapan R-1 04-Jan-10 DO 10L 094 Neponset River (Davenport Brook) 04-Oct-11 21.00 Corrected by owner39 Mercier Avenue Dorchester R-1 29-Apr-11 DO 10L 094 Neponset River (Davenport Brook) 23-Aug-11 270.51 Corrected under BWSC contract95 Montclair Avenue West Roxbury R-2 02-Jun-11 OF 23I 023* Charles River (Stony Brook Conduit) 21-Sep-11 172.94 Corrected under BWSC contract31 Pinewood Street Mattapan R-1 21-Sep-11 DO 06G 108 Neponset River 17-Nov-11 173.98 Corrected under BWSC contract77 Presentation Road Brighton R-1 25-Feb-11 MH 24C 014 Charles River 28-Nov-11 102.34 Corrected under BWSC contract1 President Road West Roxbury R-1 09-Sep-10 DO 13E 174 Charles River (Bussey Brook) 08-Sep-11 81.64 Corrected by owner2 Regan Road Dorchester R-1 29-Apr-11 DO 10L 094 Neponset River (Davenport Brook) 25-Aug-11 296.35 Corrected under BWSC contract1459-1461 River Street Hyde Park Comm 01-Jun-10 DO 04F 189 Neponset River 20-Oct-11 188.81 Corrected under BWSC contract71 Robin Street West Roxbury R-1 02-Aug-11 OF 23I 023* Charles River (Stony Brook Conduit) 29-Oct-11 58.18 Corrected under BWSC contract126 Sanborn Avenue West Roxbury R-1 04-Nov-09 DO 11B 123 Charles River (Wetland near West Roxbury High) 11-Aug-11 22.62 Corrected by owner953 Saratoga Street East Boston R-3 28-Jan-10 DO 29O 001 Boston Harbor (Constitution Beach) 03-Oct-11 47.45 Corrected by owner41 Saybrook Street Brighton R-1 23-Feb-10 DO 24D 032 Charles River 10-Nov-11 54.00 Corrected by owner* MWRA Outfall 2 - 24

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-7: Illegal Connections Corrected in 2011Address District Bldg type Date Identified Outlet Num Receiving Water Date correctedSewage Rem# 1 Status7 School Street Charlestown R-1 04-Jul-11 DO 27J 001 Charles River (Millers River) 04-Jul-11 51.55 Corrected under BWSC contract954 South Street Roslindale R-2 22-Apr-11 OF 23I 023* Charles River (Stony Brook Conduit) 04-Aug-11 90.44 Corrected under BWSC contract87 Standard Street Mattapan R-2 13-Jan-11 DO 08J 050/049 Neponset River 14-Mar-11 189.63 Corrected under BWSC contract77 Standard Street Mattapan R-1 05-May-11 DO 08J 050/049 Neponset River 01-Aug-11 57.18 Corrected under BWSC contract32 Supple Road Dorchester R-2 14-Jul-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) 26-Oct-11 343.98 Corrected under BWSC contract35 Tennis Road Mattapan R-2 13-May-11 DO 07H 285 Neponset River 01-Sep-11 174.45 Corrected under BWSC contract53 Van Brunt Street Hyde Park R-1 01-Nov-11 DO 03F 159 Neponset River 29-Nov-11 6.41 Corrected by owner267 Wachusett Street Jamaica Plain R-1 20-May-11 OF 23I 023* Charles River (Stony Brook Conduit) 28-Oct-11 6.23 Corrected under BWSC contract214 Weld Street West Roxbury R-1 11-Nov-10 DO 13E 174 Charles River (Bussey Brook) 03-Mar-11 230.59 Corrected under BWSC contract54 West Tremlett Street Dorchester R-3 05-Jul-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) 04-Nov-11 312.71 Corrected under BWSC contract365 Western Avenue Brighton Comm 18-Oct-11 DO 25E 037 Charles River 16-Nov-11 2552.00 Corrected under BWSC contract53A Wildwood Street Dorchester R-1 29-Apr-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) 31-Aug-11 183.75 Corrected under BWSC contract40 Woolson Street Mattapan R-3 04-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) 16-Aug-11 62.77 Corrected by owner189 Wordsworth Street East Boston R-2 23-May-11 DO 28O 025 Boston Harbor 19-Jul-11 6.23 Corrected under BWSC contract* MWRA Outfall 2 - 25

January 2012BOSTON WATER AND SEWER COMMISSIONILLEGAL CONNECTION REMEDIATION PROGRAM 2011Table 2-8: Illegal Connections Outstanding on December 31, 2011Address District Bldg type Date Identified Outlet Num Receiving Water Status54 Arborfield Road Roslindale R-1 07-Jan-11 OF 23I 023* Charles River (Stony Brook Conduit) Additional investigation needed35 Arborfield Road Roslindale R-1 07-Feb-11 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued6 Belnel Road Mattapan R-1 21-Nov-11 DO 06H 107 Neponset River Included in BWSC correction contract22 Birchcroft Road Mattapan R-1 28-Dec-07 DO 06G 108 Neponset River Internal issue; Referred to Legal to Notify Owner972-974 Blue Hill Avenue Dorchester Indus 13-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Additional investigation needed1589-1593 Blue Hill Avenue Mattapan Comm 18-Oct-11 DO 07H 285 Neponset River Internal issue; Enforcement Notice Issued1082 Canterbury Street Roslindale R-2 18-Oct-06 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued8 Chipman Street Dorchester R-3 22-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner50 Colonial Avenue Dorchester R-3 19-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner305-307 Corey Street West Roxbury R-2 07-Dec-11 DO 12B 124 Charles River (Brook Farm Brook) Internal issue; Enforcement Notice Issued33 Edwardson Street Hyde Park R-1 07-Dec-11 DO 06G 108 Neponset River Internal issue; Enforcement Notice Issued85 Elm Hill Avenue Roxbury R-1 07-Dec-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract39 Englewood Avenue Allston/Brighton Condo 13-Oct-11 DMH 20D 055 Muddy River (via Brookline/Village-Strathmore) Internal issue; Owner has been notified49 Firth Road Roslindale R-2 13-Nov-01 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued125 Garfield Street Hyde Park Exempt 07-Jul-08 DO 04F 204 Neponset River Internal issue; Owner has been notified27 Halsey Road Hyde Park R-1 27-Dec-11 03F 159 Neponset River Included in BWSC correction contract2 Highfield Terrace Roslindale R-1 17-Aug-11 OF 23I 023* Charles River (Stony Brook Conduit) Additional investigation needed167 Homestead Street Roxbury Apt 07-Dec-11 OF 23I 023* Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract273 Huntington Avenue Hyde Park R-2 23-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) Internal issue; Enforcement Notice Issued277 Huntington Avenue Hyde Park R-2 22-Nov-11 OF 23I 023* Charles River (Stony Brook Conduit) Included in BWSC correction contract69 Homer Street East Boston R-3 29-Nov-11 DO 28N 207 Boston Harbor Internal issue; Enforcement Notice Issued27 Irma Street Dorchester R-3 19-Nov-07 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Mortgage forclosed; bank has been notified224-232 Market Street Brighton Comm 31-May-11 DO 24D 032 Charles River Additional investigation needed21 Mascot Street Dorchester R-2 21-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract61 Morrell Street West Roxbury R-1 05-Oct-11 DO 07C 006 Charles River Internal issue; Referred to Legal to Notify Owner70 Norwell Street Dorchester Apt 22-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Included in BWSC correction contract26 Regina Road Dorchester R-3 05-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Enforcement Notice Issued27 Rendall Road West Roxbury R-1 19-Apr-11 DO 13D 077/078 Charles River (Bussey Brook) Additional investigation needed28 Ruskindale Road Mattapan R-1 11-Jun-10 DO 06G 108 Neponset River Additional investigation needed5 Ryder Hill Road Brighton R-1 30-Nov-11 DO 24D 032 Charles River Included in BWSC correction contract25 Warren Street Brighton School 27-Jun-08 DO 25E 037 Charles River Internal issue; Owner has been notified587-605 Washington Street Dorchester Comm 13-Dec-11 DO 11I 577 Charles River (Stony Brook Conduit, Canterbury Brook) Internal issue; Referred to Legal to Notify Owner583 Weld Street West Roxbury R-2 03-Dec-11 DO 12B 124 Charles River (Brook Farm Brook) Internal issue; Enforcement Notice Issued* MWRA Outfall 2 - 26

3.0 STORMWATER MANAGEMENT ACTIVITIESThe Stormwater Management Program consists of a variety of programs, activities, andbest management practices aimed at preventing the discharge of pollutants to stormdrains and receiving waters. These measures include maintenance, structural,managerial, regulatory, and educational programs. Key elements of the Commission’sStormwater Management Program and Stormwater Management Plan implementation aredescribed in this section.3.1 OPERATION AND MAINTENANCE OF STRUCTURAL CONTROLSCombined sewer overflows, sanitary sewer overflows, sewage infiltration into stormdrains and system backups can be prevented by maintaining the capacity and structuralintegrity of the sewerage and drainage systems. The Commission accomplishes this bycleaning, repairing or replacing sanitary and combined sewers and storm drains,separating combined sewers, and by preventing and removing infiltration and inflow tothe sewer system. To determine where structural deficiencies exist and where repairs areneeded the Commission performs television inspections of sewers and drains.Since the Commission’s inception in 1977, major sewer system improvements haveresulted in increased system capacity and the virtual elimination of dry weather overflowsfrom combined sewers into Boston Harbor and the Neponset, Charles, and Mystic Rivers.Over the last several years, the Commission has completed major sewer separationprojects under the court ordered MWRA CSO Plan. Separation work has been completedin Dorchester, in the Stony Brook area of Jamaica Plain, in the Constitution Beach area ofEast Boston, and most recently, in the Fort Point Channel area in South Boston.A Commission recently completed the Morrissey Boulevard Drainage Conduit (MBDC)project. The MBDC project was undertaken by the Commission on behalf of theMassachusetts Water Resources Authority in conjunction with the Authority’s NorthDorchester Bay CSO Storage Tunnel (NDBST) Project. The MBDC collects stormwaterflows from Morrissey Boulevard and its side roads, and conveys it to Dorchester Bay.Most of the stormwater discharged to the MBDC is treated by particle separators thatwere constructed on storm drains serving businesses along Morrissey Boulevard. Thenew particle separators are owned and maintained by the owners of the properties wherethey are located.The MWRA completed the NDBST Project in 2011. Now stormwater flows from therecently separated area tributary to 18L087 generated from smaller storms are conveyed3 - 1

to the NDBST and to Deer Island to be treated, while stormwater flows generated fromvery large storms are directed to the MBDC. Outfall 18L087 near Mother’s rest inDorchester was no longer needed so it has been eliminated.a. Storm Drain and Sewer Maintenance by BWSC StaffThe Commission’s Operations Division is responsible for smaller sewer and drain relatedrepair, maintenance and cleaning jobs, as well as some television inspections of sewersand drains. In 2011, the Commission jetted, vactored or rodded 422,852 linear feet ofpipe.In 2011, the Commission owned five (5) “vactor” high-pressure cleaning trucks to cleanaccumulated materials from sewers and drains, six (6) jet trucks, one (1) multi-roddertruck, and two (2) hydraulic bucket machines to clear blockages. To determine wherestructural deficiencies exist and where repairs are needed, the Commission crewsperformed television inspections of 25,687 linear feet of sewer and drain pipe in 2011.In conjunction with the storm drain and catch basin cleaning programs, the Commissionroutinely clears debris from twelve (12) brook inlets and outlets throughout the City.Since the primary purpose of this practice is to prevent upstream flooding, the cleaning istypically performed immediately prior to major storm events and usually they arechecked after storm events to determine if follow up cleaning is needed. The locationsand frequency of cleaning is provided in Table 3 – 1.b. Catch Basin MaintenanceThe Commission has approximately 31,752 catch basins in its sewer and drainagesystems. Other catch basins in the city are owned by other public agencies such as thestate Department of Conservation and Recreation, Mass Department of Transportation, orare located on private property.The Commission currently owns six (6) clamshell trucks. Commission forces have beenaugmented by contract forces and equipment since 2001. Contract forces currently cleanany catch basin containing twenty (20) inches or more of sediment. Contractors typicallycomplete two passes through the city each year cleaning basins as directed by theCommission.In 2011, Commission and contract forces performed 14,640 catch basin cleanings. Catchbasin cleanings are currently transported to the Material Handling Facility on AlfordStreet, where they are temporarily stored until transferred for proper off-sitedisposal/reuse at and approved facility. An estimated 4,680 tons of material taken fromsewers, drains and catch basins was transferred by the Commission’s contractor in 2011.It is not known how much of the material transported was just from the catch basins,although it is believed to be a majority of the amount.3 - 2

Table 3 - 1 Brook Inlet and Outlet CleaningWaterway Neighborhood Frequency of Cleaning Equipment UsedArboretum Outfall Jamaica Plain Checked before/after storms; cleaned as needed Flushing/Rodding CrewBussey Brook/Stony Brook Conduit/Treeland Jamaica Plain Checked before/after storms; cleaned as needed Catch Basin TruckBussey Brook-Next to Church Of the Annunciation West Roxbury Checked before/after storms; cleaned as needed Catch Basin Truck, CraneCanterbury Brook Conduit @ American Legion Hwy Roslindale Checked before/after storms; cleaned as needed Rodding/Flushing crew/ Catch Basin TruckCanterbury Brook Outlet at Harvard Street Mattapan Checked before/after storms; cleaned as needed Flushing/Rodding CrewCentre Street/Lane West Roxbury Checked before/after storms; cleaned as needed Flushing/Rodding CrewChandler Pond Brighton Checked before/after storms; cleaned as needed Flushing/Rodding CrewGrove Street-Wetlands (particle separator) West Roxbury Checked before/after storms; cleaned as needed Catch Basin Truck, VactorMother Brook West Roxbury Checked before/after storms; cleaned as needed Flushing/Rodding CrewMuddy River-Riverway and the Fenway/Grates Boston Checked before/after storms; cleaned as needed Catch Basin Truck, CraneNorton Street-intermittent stream Hyde Park Checked before/after storms; cleaned as needed Flushing/Rodding CrewAmerican Legion Hwy near Wilmot St Hyde Park Checked before/after storms; cleaned as needed Flushing/Rodding Crew3 - 3

c. Commission Particle SeparatorsThe Commission evaluates whether installation of particle separators is feasible andappropriate when designing storm drain capital improvement projects. The total numberof particle separators owned by the Commission currently remains at 15. Informationregarding the various particle separators, including their locations, receiving waters, andinspection and cleaning dates in 2011 is summarized in Table 3-2.d. Large Storm Drain and Sewer Programs under BWSC’s CIPLarge cleaning and maintenance jobs are performed by outside contractors under theCommission’s Capital Improvement Program. The Commission’s three-year CapitalImprovement Program (CIP) is updated annually. The 2011-2013 CIP included $44.1million for sewer and drain related projects, of which $14.1 million was earmarked for2011. Highlights of the Commission’s 2011-2013 Capital Improvement Program areprovided below.Sewer Renewal and ReplacementRenewal and replacement (R/R) projects involve the rehabilitation or replacement ofsewers and storm drains because of structural deterioration, excessive emergency repairs,and other operation and maintenance problems. The Commission identifies sewer anddrain lines that require renewal or replacement through television inspections, sewersystem evaluation surveys, and routine maintenance activities.The objectives of the renewal and replacement program are to insure the operability ofsewers and storm drains, protect the structural integrity of the sewer system, reduce longtermcapital and maintenance costs and minimize disruptions of service caused bysewerage back-ups or other related problems.The 2011-2013 CIP provided funding for numerous sewer renewal and replacementprojects citywide, including repair or replacement of defective sewer pipes, andinstallation of new drains in Back Bay/Beacon Hill, East Boston, Roslindale, Roxburyand West Roxbury, new sewer facilities for the Boston Housing Authority’s Old ColonyHousing development, and rehabilitation of the 48x52 inch combined sewer under thePublic Garden.Increased Capacity ProjectsThe Commission continues to make capital investments to increase capacity in someareas and maximize capacity in other areas. The goals of these projects are to ensuresufficient hydraulic flow in all areas of the city, reduce long-term maintenance costs,minimize the frequency and volume of CSO discharges, and maintain the structuralintegrity of the wastewater collection system.3 - 4

Table 3 - 2 BWSC Particle Separator Cleaning 2011Location Neighborhood Type Map # Outfall # Receiving Water2011 MaterialRemoved (cubicyards) VariousdatesArnold Aroboretum Jamaica Plain Vortex 13F 13F011 Bussy Brook 1.500Centre Lane WROX Vortex 8C 8C025,8C026 Wetlands 0.050Centre Street WROX Vortex 6C 6C110 Wetlands 0.250Coleridge Street East Boston Box 28O 28O025 Boston Harbor 0.005Coniston Road Roslindale Box 12E 13I023 Stony Brook Conduit 0.000Denny Street Dorchester Vortex 15L 15L089 (CSO) Malibu Beach 0.150Ericsson Street Dorchester Box 12M 12M091 Neponset River 0.200Fenwood Road Roxbury Box 20G 20G161 Muddy River 0.250Lawley Street Dorchester Box 12L 12L092 Pine Neck Creek 0.010Neponset Avenue Dorchester Box 11M 11M093 Neponset River 0.500Norton Street Hyde Park Box 3E 3E185 Open Channel 0.001Perkins Street Jamaica Plain Vortex 17F 17F012 Jamaica Pond 0.000Waldemar Avenue East Boston Box 30P 30P107 Belle Isle Inlet 0.001Waldemar Avenue East Boston Box 31O 31O004 Belle Isle Inlet 0.005Walter Street Roslindale Vortex 12F 12E418 Wetlands 0.001TOTALS 2.9233 - 5

Increased capacity projects funded in 2011 included sediment removal from 6 largeintercepting sewers, reconstruction of storm drain outfall 28K061, cleaning of outfall 010in East Boston, and improvements to drains in the Longwood Medical Area.Sewer SeparationThe primary purpose of sewer separation is to reduce the frequency and volume of wetweather CSO discharges. The Commission’s separation program involves the conversionof combined sewer systems to separate sanitary sewer and storm drain systems.Typically, separation is achieved by converting the combined sewer to a sanitary sewerand installing a new storm drain.The 2011-2013 CIP provided funding for the design and construction of numerous sewerseparation projects, including major CSO sewer separation projects in East Boston, alongMassachusetts Avenue in Lower Roxbury/North Dorchester, Dudley Square and atBullfinch Triangle. Funding was also provided to relocate the regulator on theDorchester Brook Sewer, and preliminary design for sewer separation in Roxbury.Included in this category of CIP funding is the Citywide Illegal Connection Investigationprogram, correction of illegal connections by a Commission contractor, and theCommission’s ejector pump program for reimbursing homeowners for the correction ofillegal connections on their properties.I/I Reduction ProgramThe 2011-2013 CIP included funding to decrease the amounts of infiltration and inflowentering the sewer system. Removal of I/I retains and restores the capacity of the sewersystem and helps prevent sewer overflows. The 2011-2013 CIP included funding todisconnect downspouts connected to combined and sanitary sewers in Jamaica Plain,Dorchester, Neponset, Ward Street, Allston/Brighton, West Roxbury, Roslindale, SouthBoston and Hyde Park. Included in this category of funding was installation of new andupgraded rain gauges for the Commission in 2011. Also, the Commission’s website wasupgraded to represent closer to “real time” precipitation quantities.Sewer/Drain Special ProjectsThe Sewer System Special Projects category of capital funding provides for a variety ofsystem planning and other studies, and for professional services relating to therehabilitation and operation of the sewer and drainage systems. Major projects fundedunder the special projects category included development of a development of a systemwidemetering program, and development of a Wastewater/Drainage Facilities Plan.3 - 6

3.2 CONTROL OF NON-STORMWATER DISCHARGES TO THEDRAINAGE SYSTEMa. Drainage Discharge PermitsArticle C, Section 5 of the Commission’s Sewer Use Regulations describes the dischargeprohibitions and restrictions applicable to the Commission’s storm drainage system.Under the Sewer Use Regulations any discharge of wastewater or other waters notcomposed entirely of stormwater into a building storm drain or a Commission stormdrain is prohibited, except as authorized by the regulations. Authorized dischargesinclude discharges for which the owner has obtained both a Drainage Discharge Permitfrom the Commission and an NPDES Permit or NPDES Permit Exclusion from EPA, aswell as such discharges as river or stream flow, rising groundwater, uncontaminatedgroundwater, waters from hydrant flushing, and other potable water sources associatedwith the maintenance of the water distribution system or fire fighting, irrigation water,and street and pavement wash waters.Discharges requiring a Drainage Discharge Permit include permanent subsurfacedrainage, non-contact cooling water, non-contact industrial process water, or watersassociated with hydrological testing, groundwater treatment/remediation, and removaland installation of an underground storage tank. Drainage Discharge Permits are issuedby the Commission’s Field Engineering Division. The Commission may deny orcondition a Drainage Discharge Permit to prevent the discharge of contaminants to thestorm drainage system. Failure to obtain a Drainage Discharge Permit from theCommission carries a fine of up to $1,000 per day of violation under Sewer UseRegulations. In 2011, the Commission issued 11 Drainage Discharge Permits fordischarges to storm drains.The requirements for Drainage Discharge Permits are described in the Commission’sRequirements for Site Plans, and developers and potential dischargers are informed of therequirements when they request a General Service Application for a building sewer orbuilding storm drain connection. In addition, owners and developers are informed of theDrainage Discharge Permit requirements through comment letters submitted by theCommission to Massachusetts Environmental Policy Act (MEPA) Unit and the BostonRedevelopment Authority in response to Environmental Impact Reports.b. Abrasive Blasting or Chemical Cleaning PermitsFor any project involving repair or cleaning of existing masonry, the project proponent isrequired to obtain from the Boston Air Pollution Control Commission a permit forAbrasive Blasting or Chemical Cleaning.In accordance with the permits, applicants are required to provide a detailed descriptionas to how chemical mist and run-off will be contained and either treated before discharge3 - 7

to the sewer or drainage system or collected and disposed of lawfully off site. AirPollution Control Commission representatives perform periodic spot checks of projectsites to ensure that the proponent is complying with the permit.The Air Pollution Control Commission reports to the Commission any violations theyobserve which result in the discharge of contaminants to drainage system from thecleaning operation.c. Illegal Dumping and Emergency Spill ResponseThe Commission’s Sewer Use Regulations prohibit the dumping of any material into acatch basin, including any solid waste, construction debris, paint or painting product,antifreeze, hazardous waste, oil, gasoline, grease and all other automotive and petroleumproducts, solvents and degreasers, drain cleaners, commercial and household cleaners,soap, detergent, ammonia, food and food waste, grass or yard waste, leaves, animal feces,dirt, sand, gravel or other pollutant. Illegal dumping to catch basins carries a fine of up to$5,000 per day of violation under the Commission’s Sewer Use Regulations.Reports of illegal dumping to catch basins are directed to the Field Engineering Divisionwhich dispatches staff immediately to investigate. Upon investigation, if the violator canbe identified, the violator is required to pay for cleaning of the affected catch basins,sewers, or storm drains. If the Commission does not observe the dumping in progress,but has good reason to believe a particular party is responsible, the Commission mayverbally warn them of the environmental and legal ramifications of the action. When theviolator cannot be identified, the Commission pays for a licensed contractor to clean outthe affected catch basins, sewers and drains.Commission crews are available 24-hours a day to assist the Department of EnvironmentalProtection, the Boston Fire Department and the U.S. Coast Guard in determiningwhere a hazardous spill has entered or could potentially enter the Commission’swastewater or storm drainage systems. If the spill has entered either system, Commissionpersonnel determine how far the contamination has traveled and whether there is the riskof an overflow to a waterway. The Commission also attempts to trace the spill upstreamto locate and identify its source. When the source of the spill cannot be determined, theCommission pays for a licensed contractor to clean up the spill.In 2011, Field Engineering responded to 102 reports of a potential spill, leak, or report ofillicit dumping. Table 3 – 3 lists the incidences to which the Commission responded in2011. Field Engineering issued violation/enforcement notices in fifteen (15) instances.Fines were issued in two (2) instances.3 - 8

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response2011 HAZMAT SPILL & SEWER USE VIOLATIONSDate Street Complainant BSWC Personnel Type Cause of Incident / Responsible Party1 1/3/11 251 Boston Street, Dorchester BFD/BPD Sayers Heating Oil Release3/4" full 275 gallon heating oil tank release in basement. No impact to BWSC facilities. Water serviceto building temporarily terminated per request of BFD.2 1/31/1125 Dorchester Avenue, SouthBostonBFD Sayers/Taylor Hydraulic Fluid Release25 gallons from a truck/trash compactor into private cb. Spill was contained to within the private cb.US Postal Annex property.1 2/15/11 1 Ellery Street, South Boston BFD Greeley Oil/Waste oil2 2/18/11 Tenean Street, Dorchester Public Sayers/Greeley Diesel Fuel3 2/25/11Lambert Avenue @ MillmontStreet, RoxburyPublic Sayers/Greeley Residual Oil4 2/26/11 364 Warren Street, Roxbury BPD Vidalis/Slade GasolineTrucks with illegal storage of waste oil impacted roadway, snow, and cb's. Reliable diesel to removevehicles, snow and have cleanup company clean up area.Large puddle of apparent diesel fuel water mix infront of MBTA yard. Unknown quanity/unknownsource of spill appears to have been in ice/snow banks then appeared when melting occurred. MBTAcleaned up spill. SDO-092 boomed.Responded to report of active illegal dumping. Upon arrival no evidence of illegal dumping observed.Slight minor sheen from street runoff rain/snow melt going to cb's which go to combined sewer.Release of approx 20-gallons of gasoline at Boston Police Dept Station from overfilled vehicle. Noimpact to drain system, spill contained to pavement & one private cb. Contractor cleaned up.1 3/1/11 46 Colonial Avenue BFD Sayers/Greeley Other Asbestos in building, hot water tank broken. No impact to BWSC system2 3/3/11 Rear 180 Ruggles St, Roxbury BFD Sayers Heating Oil3 3/13/11 7 Sachem Street, Mission Hill BFD Sayers Heating Oil4 3/15/11 616 Blue Hill Avenue, Roxbury BFD Sayers/Greeley Heating Oil5 3/16/11 3575 Washington St, Jamaica Plain BFD Sayers Gasoline6 3/22/11 20 Yawkey Way, Fenway BFD Sayers Hydraulic Fluid7 3/31/11 Fanueil Hall, Downtown BFD Sayers Hydraulic Fluid8 3/31/11 450 Brooline Avenue, Fenway Public Greeley/Sayers Green DyeBHA Whitter Street Projects. Overfill during delivery of above ground storage tanks located outside.No impact to BWSC infrastructureHeating oil release from vandilism. Unknown amount of water/heating oil released, spill contained andimpacted one CB. Cleaned by Clean Harbors/MA DEPHeating oil release from unpermitted removal of (2) 275-gallon heating oil tanks. No apparent impactto BWSC systemObserved gasoline release from onsite vehichle during BEST strike. Property owner hired contractorto conduct cleanup of one impacted cb.Release of 5-10 gallons of hydraulic fluid from crane. No impact to BWSC sewer or drain lines.Cleanup company hired by at fault party.Release of less than 5 gallons of hydraulic fluid from delivery truck. No impact to BWSC sewer ordrain lines. Cleanup company hired by at fault partyGreen colored substance found in Muddy River at SDO-161. Tracked upstream, found was from#450 Brookline Ave. Conducted roof leader dye testing without any notification to city agencies1 4/15/11 136 Saint Botolph St, Back Bay Mayor's Office Wong Material2 4/22/11 139 Metropolitian Ave, Roslindale Mayor's Office Kiessling/Sayers PaintMinimal contruction materials around/in cb. Peter Wong warned owner of 136 St Botolph St who wasdoing renovation work do not dump materials in CB.Investigated report of illegal dumping to catch basins near #139 Metropolitian Ave, no evidence ofpaint found in nearb cb's.3 4/25/11160 Faneuil Hall Marketplace,DowntownBWSC Taylor/Wong Groundwater/SedimentContractor at #160 Faneuil Hall discharging to catch basin groundwater and sediments without adewatering permit. Violation letter sent.4 4/27/11 15 Rusfield Street BFD Taylor Paint5-gallons of yellow paint spilled into a catch basin. Responsible party (U-HAUL) hired clean upcompany to clean out the catch basin.3 - 9

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response5 4/27/11 202 West First Street BWSC Wong Grease, oil, degreaserAMRAMP, Inc. observed washing down equipment covered in grease and degreaser into nearbycatch basin. Violation warning letter sent1 5/2/11 46 Belgrade Avenue, Roslindale BFD Taylor Oil, grease, saltBEST Strike. Oil water seperator was not in compliance. Violation letter with fine sent. Oil and saltrunning off parking lot to nearby catch basins.2 5/4/11 I St @ East First St, South Boston BWSC Greeley Oil Oil based substance found during inspection of regulator sump MH228. Unknown source.3 5/9/11West Springfield St @ TremontSt, South EndPublic Sayers Oil4 5/12/11 157-191 Geneva Avenue, Roxbury BWSC Sayers Dirt/Sediments5 5/13/11 391 Market Street, Brighton BWSC Sayers Dirt/Sediments6 5/17/11Consitution Wharf Marina,CharlestownBFD Sayers Diesel FuelInvestigated report of illegal dumping of oil to catch basin. After investigating no evidence of illegaldumping was observed.While driving by noticed large amount of dirt from MBTA contruction site impacting 2 catch basins.Engineering firm in charge of project to be contacted by Eng.Customer Service RE: Erosion ControlPlanWhile conducting gsa dye test observed sediments from construction site impacting 3 catch basins.Engineering firm in charge of project to be contacted by Eng.Customer Service RE: Erosion ControlPlan & no water let on to site until cleaned up40-50 gallon release into harbor from small boat barge that sank in Consitution Wharf Marina. Noimpact to BWSC infrastructure.7 5/18/11Charlesgate @ Storrow Drive,FenwayBFD Sayers/Salvatore/Kiesslin Gasoline Taxi cab drove into Muddy River. No impact to BWSC infrastructure or to Muddy River.8 5/18/11 1158-1176 Tremont Street, Roxbury BWSC Sayers Dirt/Sediments BHA contractor dewatering without dewatering permit. Violation warning letter sent9 5/18/11 301 Bunker Hill Street, Charlestown BFD Sayers Gasoline10 5/23/11 13 Bowdoin Street, Dorchester BPD Sayers Motor Oil11 5/25/11Rear 1229 Commonwealth Ave,BrightonBPD Sayers/Taylor Hydraulic FluidGasoline vapors in sewer MH77 on Belmont St. Vapors in 297 & 301 Bunker Hill St. Could not findsource of gas, unknown quanity.BEST Strike. Oil water seperator was not in compliance. Digging french drain onsite with no permits.Follow up to investigate issue warning letter or fine once cleaned outReport of illegal dumping. 8-gallons of hydraulic fluid from trash compactor, employee of liquor storeleasing property attempt to wash away with hose. Property owner cleaned up spill. Warning lettersent.12 5/27/11 99 Waldeck Steet, Dorchester Public Sayers Sewage 99 Walldeck Street illegally pumping sewage from basment via sump pump to street.1 6/2/11 230 Start Street, Back Bay Mayor's Office Wong/Salvatore Material Investigated discharge to sidewalk. Property is discharging groundwater2 6/3/11 36 A Street, South Boston Public Wong/Salvatore Other3 6/10/11 33 Locust Street, Dorchester Public Sayers Hydraulic FluidWorker pressure washing dumpster and trash barrels into nearby catch basin, stopped once notified.Violation warning letter sent.Report of illegal dumping, investigated found out #33 Locust St had unreported release of hydraulicfluid. Cyn Enivornmental contracted cleaned out 2 impacted cb's. Violation warining letter sent.4 6/13/11MLK Boulevard @ Walnut Ave,RoxburyPublic Taylor/Salvatore Grease Investigated report of illegal dumping of grease. No evidence of illegal dumping found.5 6/13/11 10 Gilmore Terrace, West Roxbury BFD Sayers/Kiessling Gasoline6 6/16/11 Marie Street, Dorchester Mayor's Office Sayers/Taylor OtherGasoline vapor odors @ 11 Gilmore Terrace. Investigated area found car leaking fuel at 126 AnawanAve. Vehicle owner hired cleanup company to clean out one impacted cb, drop inlet, & street.Investigated report of illegal dumping. No evidence of illegal dumping found. Liquid was water fromvactor truck working on Eng. Design contract.7 6/17/11 3204 Washington St, Jamaica Plain Mayor's Office Sayers Other Investigate report of water surfacing, appears to be groundwater upon several site visits.3 - 10

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response8 6/17/11 250 Northern Ave. South Boston BFD Sayers/Taylor Hydraulic Fluid Minor release of hydraulic fluid to cb drop inlet. Massport drain line not BWSC's.9 6/20/11 225 Centre Street, Jamaica Plain Public Wong Material Contractor doing work sediments running into catch basin. Contractor took corrective actions10 6/20/11 401 Park Drive, Fenway Public Wong Material Contractor doing work sediments running into private catch basin. Contractor took corrective actions11 6/22/11 1181 Bennington Street, E.Boston BEST Sayers Motor Oil Checked oil water seperator, owner had records on file indicating recently cleaned. In compliance.12 6/24/11 226 Tremont Street, Downtown Public Sayers Sewage llegal dumping, contractor pumping sewage from SSO out to Stuart Street. Violation warning letter sen1 7/1/11 1390 Dorchester Ave, Dorchester BFD Sayers Waste Oil2 7/2/11 Congress St @ B St, South Boston BFD Vidalis Gasoline3 7/6/11 3 Revere Street, Jamaica Plain BWSC Wong/Salvatore Material4 7/6/11 350 Bremen Street, East Boston BFD Sayers Material80-gallons of waste oil spilled during non-permitted removal of tanks. Work onsite apparently alsotried to wash it away. One cb & 425-ft of drain impacted and cleaned. Violation letter with fine sent.8-gallons of gasoline relased into CB due to auto accident/punctured tank. Contractor hired cleanedstreet and the one impacted CB.Construction debris from active construction site on Revere Street & sidewalk. P.Wong notified owne& contractor. They installed sedimentation controlsConstruction debris from active demolition site on Bremen Street & sidewalk. Violation letter sent, siteplan approval suspened5 7/11/11Albany St @ Massachusetts Ave,RoxburyPublic Wong MaterialDagle Electrical Construction Corp conducting sawcutting in street. Construction debris including dirt,cement, and concrete running off into cb. Violation letter sent6 7/11/11 1619 Tremont Street, Jamaica Plain BWSC Taylor/Sayers Material7 7/11/11 3 Burnside Avenue, West Roxbury Mayor's Office Wong Material8 7/14/111742-1748 Dorchester Avenue,DorchesterBFD Sayers Waste Oil9 7/14/11 626 Centre Street, Jamaica Plain BPD Sayers Material10 7/19/11 1 Colberg Avenue, Roslindale BFD Sayers/Vidalis Gas/OilSSO event, owner of 1619 Tremont illegally discharged sewerage to Tremont St via sump pump.Owner hired Cyn Environmental to clean up approximately 100 to 500 gallons of sewerage.Kirby Masonry working at 3 Burnside Ave left trail of dirt/cement/construction debris on street towardscatch basin. Notified contractor who subsequently cleaned area, re-inspected by P.Wong aftercleanup.Boston Fire/Police hazmat & ISD onsite for inspection. Found oil water separator and garage floorbay drains not funtional & no records. Violation warning letter sent to be cleaned.Investigated report from BPD of site removing gas underground storage tank. Site exterior wasobserved to be clean during active excavation, follow up once work is done.Oil substance illegally dumped into CB48 infront on Colberg Ave. Estimated less than 10 gallons. Noresponsible party found. Cyn Environemental hired by BWSC to clean out CB48.11 7/20/11 803 Summer Street, South Boston Public Wong/Salvatore Material Contractor powerwashing paint chips. Contractor cleaned up area upon notification12 7/21/11 117 Walter Street, Roslindale BWSC Wong/Salvatore MaterialContractor discharging cement and dirt while installing retaining wall. Contractor to install cb coveringand clean area.13 7/21/11Shawmut Ave @ East BerkeleySt, South EndBWSC Wong/Salvatore MaterialContractor saw cutting instreet generating dirt & cement. Contractor purchased & installed cb filtersacks and to clean area upon departure.14 7/21/11 100 Cambridge Street, Brighton BFD Sayers Diesel FuelCSX rail yard. Release from trailer of at least 25-gallons of diesel fuel to private catch basin. Noimpact to BWSC facilities15 7/22/11 254-262 Bremen Street, E.Boston BPD Sayers Material No impact to system. Underground storage tank removal. Contractor to install erosion controls.3 - 11

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response16 7/22/11 730 Morrissey Blvd, Dorchester BPD Greeley MaterialNo impact to system. Dry chemical release from fire supression system at gas station.Nonhazardous material17 7/29/11575 Commonwealth Avenue,FenwayBFD Taylor Motor Oil No impact to system. Motor oil spill from car contained to parking garage drain. Spill cleanup by BU.1 8/5/11 150 Northern Ave, South Boston BPD Wong Grease rease leaking from dumpster impacting catch basins. Owner hired Clean Harbors to clean impacted cb2 8/10/11 351 Bowdoin Street, Dorchester Public Sayers Transmission Fluid Illegal dumping of less than 1 quart of transmission fluid to catch basin. Violation warning letter sent.3 8/13/11 226 Sumner Street, East Boston Public Slade Grease Illegal dumping of grease into catch basin. Owner hired Clean Harbors.4 8/17/11 118-126 Blue Hill Avenue, Roxbury BEST Sayers OilBEST strike. Oil water separator needs cleaning, no records onsite. Violation warning letter sent.Onwer hired contractor to clean separator.5 8/19/11 42-44 Boynton St, Jamaica Plain BWSC Wong Paint Illegal dumping of paint into a catch basin. Contractor immediately cleaned up the area.6 8/19/11 #35 North Margin St., North End Public Sayers PlasterIllegal dumping of plaster/paint to catch basin. Contractor cleaned cb and street. Violation warningletter sent to property management company.7 8/19/11 #10 Leamington Rd, Brighton MA DEP Sayers Antifreeze Investigated report of illegal dumping from MADEP. No evidence of illegal dumping found.8 8/24/11 #252 Quincy Street, Roxbury BWSC Wong/Salvatore MaterialContractor had no erosion controls in place sediments running off of site. Upon notification contractorinstalled required erosion controls.9 8/30/11#150 Southampton Street,DorchesterBWSC Sayers MaterialContractor illegal dumped organic materials from roof cleaning to catch basin on street. Contractorgiven verbal warning and cleaned area.1 9/1/11 #2071 Centre Street, West Roxbury BFD Sayers Gasoline2 9/1/11 #97 East Springfield St, South End Public Wong/Salvatore Material3 9/6/11 #82 Ballou Ave, Mattapan BPD/BFD Sayers GasolineTruck with ruptured saddle tank spilled 60 gallons of fuel on roadway. No impacts to BWSC system.Cleanup company hire for spill cleanup by truck company.Contractor with sediments running off construction site. Contractor to install erosion controls uponverbal warning.Overturned crane. Fuel released contained to the site. No impact to BWSC system. Owners to hirecleanup company4 9/6/11#660 Commonwealth Avenue,FenwayPublic Slade AntifreezeAntifreeze leak from unknown vehicle to street. No impact to BWSC facilities. Boston Env. Dept andBoston5 9/6/11 #7 Duncan Street, Dorchester Mayor's Office Sayers OilProperty owners of 1401 Dorchester Ave to have area and private cb cleaned. Autozone to havehazardous waste removed. Complaint of vapors from #7 Duncan St.6 9/12/11Western Ave @ North Harvard St,Allston/BrightonBPD/BFD Taylor Hydraulic fluid Hydraulic fluid release from unknown vehicle. No impact to BWSC facilities.7 9/16/11 Trinity Place, Downtown BWSC Vidalis Cleaning solution8 9/22/11 33 Woolson Street, Mattapan BFD Sayers Transmission FluidDuring GSA dye test workers from Fairmont Copley hotel observed illegally dumping a cholorinatedcleaning solution into a catch basin. Violation Warning sentIllegal discharge to street, approximately 1 quart of transmission fluid impacted CB. Area cleaned byproperty management company.9 9/24/11Utica Street @ Beach Street,DowntownBFD Sayers Cooking oil /greaseRelease of two 55-gallon drums of cooking oil/grease. Clean up company cleaned street andimpacted storm drain and catch basin.3 - 12

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response10 9/29/11 Mount Vernon Street, Dorchester BPD/BFD Greeley Mineral Oil Ruptued Nstar transmission line released mineral cooling oil. Nstar hired contractor clean up.11 9/30/11Stillman Place @ Cooper Street,North EndCity Councilor'sOfficeWong Grease Investigated report of illegal dumping of grease to catch basin. No grease observed.12 9/30/11 368 Warren Street, Roxbury BEST Sayers Other1 10/3/11 84 Pickney Street, Beacon Hill Public Sayers Other2 10/3/11 661 Tremont Street, South End BFD R. Limardo - ops Oil vapors3 10/5/11 2000 Washington Street, Roxbury BWSC Wong/Salvatore Other4 10/12/11 150 Southampton St, Dorchester BPD/BFD Sayers Material5 10/13/11 120 Southampton St, Dorchester BWSC/BPD Sayers Odor6 10/15/11 Interstate 93 South, Charlestown BFD Vidalis GasolineBEST team strike, investigated report of illegal dumping to catch basins. No evidece of illegaldumping observed, no other BWSC violations observed.Contractor discharging orgain materials from private drain cleaning to catch basins at Pickney St andWest Cedar St. Contractor stopped upon notification and will clean up area and take materials offsite.No impact to BWSC system. Ops shut off water service per BFD/ISD request. R.Limardo notifiedC.Sayers via Nextel.Investigated hose pumping water. Dry well being pumped out (dewatered) to street and cb. Buildingowner agreed not to pump to street but to grass area instead.Contractor with sediments running off construction site. Contractor to install erosion controls uponverbal warning and cleaned area.Odor from dumpster area. Property owner to have dumpster removed and cleaned and area arounddumpster cleaned.30-gallon relase of gasoline to highway catch basin. Check downstream drain manholes and outfalls,no impact to BWSC system.7 10/19/118 10/19/11Worcester Sq @ Harrison Ave,South End75 West School Street,CharlestownPublic Wong Material Investigated public complaint of illegal dumping. No evidence of dumping found.Public Wong Material Investigated public complaint of illegal dumping. No evidence of dumping found.9 10/21/11 52 South Crescent Court, Brighton Public Sayers Oil Investigated report of illegal dumping. No evidence of dumping found.10 10/25/11 71 Westminster Avenue, Roxbury BPD Sayers Material Inspected catch basins near building demolition site. No impacts observed to system1 11/3/11 375 E Street, South Boston Public Sayers Other2 11/3/11 100 Cambridge Street, Brighton BFD Sayers Diesel Fuel3 11/4/11 450 Brookline Avenue, Fenway MA DEP Sayers AntifreezeInvestigated report of illegal dumping. Sump pump found black hose discharging apparentgroundwater. No impact to BWSC system.No impact to BWSC system, release of 30 gallons of diesel fuel inside CSX railyard, spill contained,did not reach private catch basins. CSX hired cleanup company.Approximately 12-gallons of antifreeze release to roof drains from roof top HVAC unit at 450Brookline Ave. Investigated building, drain line, and outfall, no apparent impact to BWSC system.4 11/16/11605 Dorchester Avenue,South BostonPublic Sayers PaintInvestigated report of illegal dumping, found paint from recent street work on and within CB.Responsible party cleaned cb.Violation warning letter sent.5 11/18/11 271 Talbot Avenue, Dorchester BWSC Sayers Hydraulic Fluid 5 gallon release from street sweeper. No apparent impact to BWSC facilties1 12/7/11 606 East Fourth St, South Boston BWSC Wong/Sayers Material2 12/14/11 157 Seaport Blvd, South Boston BWSC Wong/Sayers MaterialContractor working at 606 East Fourth St discharging sediment & water from dewatering to street.Contractor told to immediately to cease discharging and get a dewatering permit.Contractor (Valley Crest Landscaping) working at 157 Seaport Blvd (Seaport Hotel) installing newsidewalk/sawcutting. Vebal warning not to allow construction debris to run to catch basins (Massport).3 - 13

Table 3 - 32011 Incidences of Illegal Dumping and Spill Response3 12/16/11 89 Central Street, Downtown BWSC Sayers Material4 12/22/11 2000 Washington St, South End Public Wong Other5 12/27/11 77 Iroquois St, Jamaica Plain Mayor's Office Sayers MaterialContractor working at 89 Central St discharging sediment & water from dewatering to catch basin.Property owner rep and contractor told to immediately to cease discharging or be fined. Area to becleaned by contractor.Investigated hose pumping water. Dry well being pumped out (dewatered) to street and cb. Warningletter to be sent, also did this on 10/4/11.Unknown truck appeared to have decanted into catch basin. No oil or sheen in cb. No cleanuprequired, dirty water and cb ties back into the sewer line on street.6 12/27/11Kingbird Rd @ American LegionHwy, MattapanPublic Sayers MaterialComplaint of contractor illegal dumping cement to CB. No cement dumping observed. Erosion controviolations observed at construction site during site visit fowarded to Engineering Customer Service3 - 14

d. Used Motor Oil and Paint Collection CentersThe Boston Public Works Department (PWD) operates Surplus Paint Products and UsedMotor Oil Drop-Off and Recycling Centers in the neighborhoods of East Boston,Brighton, Roxbury, and Hyde Park. In 2011 each of the centers was open one Saturday amonth, 9 a.m. to 1 p.m., from May through August. Approximately 2,440 gallons ofpaint, thinner, stain and varnish, and motor oil, were collected and recycled in 2011.e. Household Hazardous Waste CollectionThe Boston Public Works Department hosted four household hazardous waste collectionevents in 2011, as follows: May 7, and October 29, at the University of MassachusettsCampus, and June 25, and November 19, at the West Roxbury Public Works Yard. Theevents were promoted through the City’s web site, local newspapers, and on signs postedin neighborhood business centers. The Commission’s March/April and September/October issues of its Currents newsletter promoted the collection events. In addition, theApril water and sewer bill included an insert promoting the City’s Household HazardousWaste collection days in May and June. Copies of the newsletters and the insert areprovided at the end of this section. The contractor for the hazardous waste collectioncharged for the service on a “per car” load basis. It was estimated each car carried 20gallons of waste. In total, the hazardous waste collection days serviced 3,168 cars, for atotal estimate of 63,360 gallons of waste collected.f. Site Cleanliness OrdinanceTo address litter and rodent control problems, the City of Boston instituted a SiteCleanliness Ordinance in 2000. Under this ordinance, all businesses and large residentialestablishments using bulk dumpsters, including food and beverage establishments,automotive establishments, and bulk refuse container storage lots, must obtain a SiteCleanliness License from the Boston Inspectional Services Department (ISD). Theapplication for a license must include a site plan showing the location of the dumpster, aplan and schedule for maintenance, a copy of the solid waste disposal contract, and acopy of a rodent/pest control contract. An additional license is required from the PWD ifthe dumpster is located on a public way.Inspectional Services officials perform annual inspections of establishments with anylicense issued by the Department, including a Site Cleanliness license. The SiteCleanliness license will not be renewed unless and until the establishment’s dumpstercomplies with the city ordinance.3 - 15

Failure to comply with the Site Cleanliness Ordinance and obtain a Site Cleanlinesslicense may result in fines of up to $1,000 a day. Repeated violations may result inclosure of the business. ISD officials report that enforcement is very strict and that noncomplyingbusinesses typically achieve compliance within days of being issued aviolation notice.g. Yard Waste/CompostingThe Boston Public Works Department provides curbside collection of leaves and grassclippings in the residential sections of the city in the Spring and the Fall each year. Toremind residents of the collection dates in 2011, the PWD distributed public serviceannouncements to local radio and television stations. Door hangers were distributed inresidential neighborhoods and signs were posted in neighborhood commercial centers.The Commission’s September/October issue of its Currents newsletter promoted the fall2011 collection effort. In addition, the April water and sewer bill included an insertpromoting the City’s spring leaf and yard waste collection days. A copy of the newsletterand insert are provided at the end of this section.h. Pet WasteStormwater Monitoring Programs conducted by the Commission have indicated that petwaste is a significant source of bacterial contamination to stormwater. The City’s dogfouling regulation, Section 16-1.10A of the Boston City Ordinances, also called the“pooper scooper law,” requires dog owners to remove and properly dispose of the wasteleft by their dog. Penalties under the ordinance are $50.00 for failure to produce a meansof removal and $50.00 for failure to pick up the waste. The Animal Control Unit in theBoston Property Management Department is responsible for enforcing the dog foulingordinance. It is also responsible for following up on reports of vicious dogs, ensuringdogs are properly licensed and leashed, and other animal control issues.Animal Control officials report that enforcing the pooper scooper law is difficult sincethe owner and dog must be observed “in the act”. Fines have been issued to dog ownersin the past for violation of the pooper scooper law, although the exact number was notreadily available. Two Animal Control officers are assigned to patrol city parks on adaily, rotating basis to ensure that park visitors with animals are complying with Boston’sAnimal Control related ordinances.In addition, the Commission May/June issue of Currents included a feature designed toeducate and to encourage people to prevent contamination of stormwater by cleaning upafter their pets. A copy of the Currents newsletter is provided at the end of this section.3 - 16

3.3 DEVELOPMENT AND CONSTRUCTION SITESa. Site Plan Review and Compliance with Sewer Use RegulationsUnder the Stormwater Permit, the Commission must continue to implement its site planreview process and ensure compliance with its regulations. A General ServiceApplication and site plan is required by the Commission for every new water, sewer ordrainage connection to the Commission’s system. The site plan must be approved by theCommission’s Chief Engineer before construction of the pipe(s) may begin. The siteplan will not be approved unless it conforms to the Commission’s Sewer Use Regulationsand its Requirements for Site Plans.The site plan review process provides an opportunity to review the components of theproject and condition the approval on compliance with the Commission’s Sewer UseRegulations, Requirements for Site Plans, and other requirements. In 2011, 340 siteplans were approved by the Commission’s Chief Engineer.Drain Layers License: Persons installing new building sewers and storm drains, orrepairing or maintaining existing pipes must possess a Drain Layers License issued by theCommission. To obtain a Drain Layers License, persons must pass a written test givenby the Commission’s Engineering Customer Services Division. Test questions aretypically drawn from the requirements provided in the Commission’s Sewer UseRegulations, including those pertaining to illegal sanitary connections to storm drains,non-stormwater discharges, requirements for new construction and catch basin dumping.Drain Layers Licenses are renewed annually. The Drain Layers Licensing requirementprovides the opportunity to educate drain layers in Boston as to the Commission’s rulesand regulations, including those pertaining to stormwater. Twenty-one (21) new DrainLayers Licenses were issued in 2011, and 469 were renewed.Inspections of New Connections: Connection of a building sewer to a storm drain isprohibited under the Commission’s Sewer Use Regulations and carries a fine of up to$5,000 per day of violation. To ensure proper connection, the Commission requires thatall new, repaired or modified service connections be inspected by a Commissioninspector before the services are covered over by the contractor. Failure to have theconnection inspected before covering it over carries a fine of up to $750 per day underthe Commission’s Sewer Use Regulations.As an added measure, new sewer connections must be dye tested by the Commissiononce construction is completed. Failure to have a new sewer connection dye testedcarries a fine of up to $500 per day. The Commission may require that a repaired ormodified service connection be dye tested. In 2011, the Commission’s Engineering FieldServices Division performed 452 GSA related dye tests.3 - 17

Other requirements contained in the Sewer Use Regulations and Requirements for SitePlans that pertain to development and construction include the following:On-site Retention of Stormwater: Under the Commission’s Site Plan Requirements andSewer Use Regulations, developers of new projects are required to evaluate the feasibilityof retaining stormwater on-site. On-site retainage of stormwater is required wheneversite conditions permit as determined by the Commission. On-site retention of stormwaterserves to limit peak discharge rates, recharge groundwater, and remove 80 percent oftotal suspended solids in the flow to the extent feasible. This requirement is consistentwith the Department of Environmental Protection’s Stormwater Management Policywhich establishes standards for stormwater management for development.In 2011, the Commission approved 208 projects that included installation of dry wells orother type of infiltration device. Table 3 – 4 provides the addresses of the devicesapproved in 2011.Controls for New Parking Lots: In order to prevent oil, grease and sediments fromdischarging to open waterways, the Commission requires that developers install particleseparators on all newly constructed storm drains that serve outdoor paved areas of 7,500square feet in size or greater. The Commission may require particle separators onexisting storm drains from existing outdoor parking areas, where appropriate. Thisrequirement has been in place since 1992.Parking lot particle separators are typically located on private property; therefore, theirmaintenance is the responsibility of the property owner. Design criteria for particleseparators are set forth in the Commission’s Guidelines for Developers for theInstallation, Operation and Maintenance of Grit and Oil Separators, a copy of which isincluded in the Commission’s Requirements for Site Plans.In 2011, the Commission approved installation of particle separators at 35 locations.Table 3 – 5 provides the addresses of the devices approved in 2011.Drainage Discharge Permits: The Commission requires a Drainage Discharge Permitfor all non-stormwater discharges to its drainage system, including construction sitedewatering, permanent subsurface drainage, non-contact cooling water, non-contactindustrial process water, and waters associated with hydrological testing, groundwatertreatment/remediation, and removal and installation of an underground storage tank. TheCommission may deny or condition a dewatering permit to prevent contaminateddrainage from entering the sewer or drainage system. Failure to obtain a DrainageDischarge Permit carries a fine of up to $1,000 a day under the Commission’s Sewer UseRegulations. In 2011, the Commission issued 11 Drainage Discharge Permits fordischarges to storm drains.3 - 18

Table 3 - 4Private Infiltration Devices Installed in 2011PROJECT # ADDRESS # STREET NAME DISTRICTSIGNATUREDATE INFILTRATION SYSTEM10342 64 BELLE AV WROX 1/3/2011 DRYWELL10343 60 BELLE AV WROX 1/3/2011 DRYWELL08170 161 COMMONWEALTH AV BBBH 1/5/2011 LEACHING BASIN10141 278 BLUE HILL AV ROXB 1/5/2011 CULTEC CHAMBER10306 163 COMMONWEALTH AV BBBH 1/5/2011 LEACHING BASIN10349 106 QUEENSBERRY ST FEKE 1/5/2011 LEACHING BASIN10083 55 GREW AV ROSL 1/13/2011 PERFORATED PIPE10205 129 LAKE ST ALBR 1/13/2011 PERFORATED PIPE10293 346-352 WEST THIRD ST SBOS 1/14/2011 CULTEC CHAMBER10329 32 MILFORD ST SEND 1/24/2011 CULTEC CHAMBER10348 172 WEST SEVENTH ST SBOS 1/28/2011 CULTEC CHAMBER11004 25 HILLIS RD HYDE 1/28/2011 DRYWELL11006 12 OTIS PL BBBH 1/28/2011 PERFORATED PIPE11012 376 WEST BROADWAY SBOS 2/1/2011 DRYWELL10345 15 GREENBRIER ST SDOR 2/4/2011 DRYWELL10346 242-246 QUINCY ST NDOR 2/4/2011 DRYWELL11002 361 WEST FOURTH ST SBOS 2/7/2011 DRYWELL10266 62 HARVARD AV ALBR 2/8/2011 PERFORATED PIPE11018 8 LEXINGTON AV HYDE 2/9/2011 DRYWELL08350 390-396 WEST SECOND ST SBOS 2/17/2011 CULTEC CHAMBER11014 225 WACHUSETT ST ROSL 2/23/2011 DRYWELL11008 12 BELLE AV WROX 2/24/2011 DRYWELL11013 750 EAST FOURTH ST SBOS 2/24/2011 CULTEC CHAMBER10330 125 A AMORY ST JAPL 2/25/2011 LEACHING BASIN10149 30 SAINT JAMES AV BBBH 2/28/2011 PERFORATED PIPE10347 42 MONUMENT SQ CHAR 2/28/2011 DRYWELL11017 7, 11, 15 FRAWLEY ST JAPL 2/28/2011 DRYWELL11028 39-45 STANHOPE ST BBBH 3/4/2011 PERFORATED PIPE11022 540 PARKER ST FEKE 3/11/2011 PERFORATED PIPE11039 9 PARAGON RD WROX 3/16/2011 DRYWELL11047 207-207A CHESTNUT AV JAPL 3/29/2011 CULTEC CHAMBER11035 125 WESTERN AV ALBR 3/31/2011 PERFORATED PIPE11038 DAVID G MUGAR WY BBBH 3/31/2011 DRYWELL10166 391 MARKET ST ALBR 4/5/2011 DRYWELL11076 39 COFFEY ST SDOR 4/5/2011 DRYWELL11077 41 COFFEY ST SDOR 4/5/2011 DRYWELL10176 3 CAZENOVE ST SEND 4/8/2011 PERFORATED PIPE11029 58, 60 SOLARIS RD HYDE 4/8/2011 CULTEC CHAMBER11036 26-26A SWAN AV EBOS 4/8/2011 DRYWELL10241 137 TREMONT ST CENT 4/11/2011 CULTEC CHAMBER11053 176 COMMONWEALTH AV BBBH 4/11/2011 LEACHING BASIN11079 17 PARK LN ROXB 4/15/2011 DRYWELL11011 64-70 BURBANK ST FEKE 4/19/2011 CULTEC CHAMBER11045 11-13 HOWELL ST NDOR 4/19/2011 CULTEC CHAMBER10344 225 CENTRE ST JAPL 4/20/2011 PERFORATED PIPE11041 36-40 ROSEWAY ST JAPL 4/22/2011 CULTEC CHAMBER11087 95 WARREN AV SEND 4/25/2011 CULTEC CHAMBER11088 93 WARREN AV SEND 4/25/2011 CULTEC CHAMBER10084 214 SILVER ST SBOS 4/26/2011 CULTEC CHAMBER11019 110 PETERBOROUGH ST FEKE 4/29/2011 DRYWELL11048 103 WARD ST JAPL 4/29/2011 PERFORATED PIPE11092 49-51 TAUNTON AV HYDE 4/29/2011 DRYWELL11108 9 ORCHARD ST HYDE 4/29/2011 DRYWELL10323 3840 WASHINGTON ST ROSL 4/30/2011 CULTEC CHAMBER10215 25-47 SANDPIPER LN MATP 5/3/2011 LEACHING BASIN10297 18 CHERITON RD WROX 5/3/2011 LEACHING BASIN10324 3815 WASHINGTON ST JAPL 5/3/2011 CULTEC CHAMBER11078 360 MARLBOROUGH ST BBBH 5/3/2011 DRYWELL10131 157 BERKELEY ST BBBH 5/9/2011 DRYWELL11001 46-48 MOUNT VERNON ST NDOR 5/9/2011 DRYWELL11027 110 EDGEMERE RD WROX 5/9/2011 CULTEC CHAMBER10317 182 WESTERN AV ALBR 5/12/2011 PERFORATED PIPE11082 118 WEST NEWTON ST BBBH 5/12/2011 DRYWELL11113 627 EAST SECOND ST SBOS 5/12/2011 DRYWELL08244 36 & 40 FISHER AV JAPL 5/19/2011 DRYWELL11110 56-58 CORNELL ST ROSL 5/19/2011 DRYWELL11114 11 SPARHAWK ST ALBR 5/19/2011 DRYWELL11131 1015 DORCHESTER AV SDOR 5/19/2011 DRYWELL10220 23 WELLINGTON ST FEKE 5/24/2011 LEACHING BASIN11095 234-236 CLARENDON ST BBBH 5/24/2011 DRYWELL11101 60-64 NEWTON ST ALBR 5/24/2011 DRYWELLPage 19

Table 3 - 4Private Infiltration Devices Installed in 2011PROJECT # ADDRESS # STREET NAME DISTRICTSIGNATUREDATE INFILTRATION SYSTEM10328 370-400 WESTERN AV ALBR 5/26/2011 CULTEC CHAMBER11065 45 FIRST AV CHAR 5/26/2011 LEACHING BASIN11083 18R SAINT MARTIN ST CHAR 5/27/2011 CULTEC CHAMBER11084 133-141 TREMONT ST ALBR 5/27/2011 PERFORATED PIPE11081 122 BAY STATE RD FEKE 6/1/2011 CULTEC CHAMBER10134 1 WALDEN ST JAPL 6/3/2011 DRYWELL10221 401 MASSACHUSETTS AV FEKE 6/3/2011 LEACHING BASIN11042 27 CENTRE ST ROXB 6/6/2011 DRYWELL11100 16 LAWN ST JAPL 6/6/2011 LEACHING BASIN11044 75-77 EXETER ST BBBH 6/8/2011 DRYWELL11129 76W BEACH ST CENT 6/13/2011 DRYWELL11098 15-17 ELLIS ST ROXB 6/16/2011 DRYWELL11145 128 & 134 WHITFIELD ST SDOR 6/16/2011 DRYWELL11015 348-350 BREMEN ST EBOS 6/21/2011 PERFORATED PIPE11040 57 HOLTON ST ALBR 6/21/2011 LEACHING BASIN11086 65 BRAINERD RD ALBR 6/21/2011 LEACHING BASIN11116 129 LAKE ST ALBR 6/21/2011 CULTEC CHAMBER11161 317 ATHENS ST SBOS 6/21/2011 CULTEC CHAMBER11139 720 EAST SECOND ST SBOS 6/22/2011 CULTEC CHAMBER11097 74-76 CHURCH ST NDOR 6/24/2011 DRYWELL11144 1221 DORCHESTER AV NDOR 7/6/2011 UNKNOWN11046 291 SAINT BOTOLPH ST FEKE 7/12/2011 DRYWELL11141 4 LOVIS ST SBOS 7/12/2011 UNKNOWN11158 70-72 ROWE ST ROSL 7/12/2011 DRYWELL11185 40 CONSTANCE RD WROX 7/14/2011 CULTEC CHAMBER11066 972 AMERICAN LEGION HWY HYDE 7/15/2011 DETENTION POND11147 681-683 WASHINGTON ST CENT 7/15/2011 PERFORATED PIPE11154 70 BEACON ST BBBH 7/15/2011 DRYWELL11136 115 B ST SBOS 7/20/2011 UNKNOWN10338 SAYBROOK ST ALBR 7/22/2011 DRYWELL11186 80 CROSSTOWN AV WROX 7/22/2011 DRYWELL11187 82 CROSSTOWN AV WROX 7/22/2011 DRYWELL11188 84 CROSSTOWN AV WROX 7/22/2011 DRYWELL11189 86 CROSSTOWN AV WROX 7/22/2011 DRYWELL11190 88 CROSSTOWN AV WROX 7/22/2011 DRYWELL11191 90 CROSSTOWN AV WROX 7/22/2011 DRYWELL11192 92 CROSSTOWN AV WROX 7/22/2011 DRYWELL08096 120 KINGSTON ST CENT 7/25/2011 DRYWELL11179 35 CEDAR GROVE ST SDOR 7/25/2011 DRYWELL10351 10 RINGGOLD ST SEND 8/3/2011 CULTEC CHAMBER11159 9 DALTON ST BBBH 8/3/2011 LEACHING BASIN11211 20 CONCORD ST CHAR 8/3/2011 DRYWELL10350 721 EAST SIXTH ST SBOS 8/8/2011 CULTEC CHAMBER09266 194 CLARE AV HYDE 8/11/2011 DRYWELL10314 210 TALBOT AV SDOR 8/11/2011 DRYWELL11064 1515 VFW PKWY WROX 8/11/2011 CULTEC CHAMBER11218 337-345 BELGRADE AV ROSL 8/16/2011 DRYWELL11074 54, 56, 58 BARTLETT ST CHAR 8/18/2011 LEACHING BASIN11203 6 WOODCLIFF ST ROXB 8/18/2011 DRYWELL11169 11,13, 15 HANCOCK ST CHAR 8/19/2011 DRYWELL10007 214 NORTH BEACON ST ALBR 8/23/2011 PERFORATED PIPE11080 21-35 WARREN ST CHAR 8/24/2011 CULTEC CHAMBER11137 15 BURNEY ST JAPL 8/25/2011 DRYWELL11138 637 WASHINGTON ST SDOR 8/25/2011 LEACHING BASIN11007 60 BEACON ST BBBH 8/31/2011 CULTEC CHAMBER11119 2 ALVAH KITTREDGE PARK ROXB 8/31/2011 DRYWELL11050 41 MEDFORD ST CHAR 9/8/2011 DRYWELL11229 413 CENTRE ST JAPL 9/12/2011 CULTEC CHAMBER11151 15-19 TAYLOR ST SDOR 9/16/2011 LEACHING BASIN11205 21 DWIGHT ST SEND 9/16/2011 CULTEC CHAMBER11102 106-106R MINDEN ST JAPL 9/20/2011 DRYWELL11104 1989 COLUMBUS AV ROXB 9/20/2011 DRYWELL11105 130 DAY ST JAPL 9/20/2011 DRYWELL11106 1899-1901 COLUMBUS AV ROXB 9/20/2011 DRYWELL11037 22 MYSTIC ST CHAR 9/28/2011 DRYWELL11219 58 BURBANK ST FEKE 9/28/2011 LEACHING BASIN11226 44/46 SULLIVAN ST CHAR 10/3/2011 CULTEC CHAMBER10334 342 WESTERN AV ALBR 10/7/2011 CULTEC CHAMBER11085 1900-1904 RIVER ST HYDE 10/11/2011 DRYWELL11148 20 WAINWRIGHT ST SDOR 10/18/2011 DRYWELL11199 3 BUCKLEY AV JAPL 10/18/2011 DRYWELLPage 20

Table 3 - 4Private Infiltration Devices Installed in 2011PROJECT # ADDRESS # STREET NAME DISTRICTSIGNATUREDATE INFILTRATION SYSTEM11201 69 WALDEN ST JAPL 10/18/2011 DRYWELL11227 588 TREMONT ST SEND 10/18/2011 CULTEC CHAMBER11273 7 ROACH ST NDOR 10/18/2011 DRYWELL11225 5 DONCASTER ST ROSL 10/19/2011 PERFORATED PIPE11049 3A - 3J DORCHESTER ST SBOS 10/20/2011 CULTEC CHAMBER11210 262-264 ATHENS ST SBOS 10/20/2011 CULTEC CHAMBER11213 4 JUDGE ST JAPL 10/20/2011 CULTEC CHAMBER11263 11 WABENO ST ROXB 10/20/2011 DRYWELL11278 10 SALCOMBE ST NDOR 10/20/2011 DRYWELL11034 407-411 COMMONWEALTH AV BBBH 10/21/2011 LEACHING BASIN11237 83 / 87 WEST MILTON ST HYDE 10/21/2011 DRYWELL11257 320 NEWBURY ST BBBH 10/21/2011 PERFORATED PIPE11259 3912 WASHINGTON ST ROSL 10/21/2011 DRYWELL11168 48-50 RUTHERFORD AV CHAR 10/23/2011 CULTEC CHAMBER11235 21-23 GREYLOCK RD ALBR 10/25/2011 CULTEC CHAMBER07095 140 SCHOOL ST ALBR 10/27/2011 DRYWELL10222 868 EAST FOURTH ST SBOS 10/27/2011 DRYWELL11291 858 EAST SECOND ST SBOS 10/27/2011 DRYWELL11209 23 UPTON ST SEND 10/28/2011 PERFORATED PIPE11270 108 BEAVER ST HYDE 10/28/2011 DRYWELL11056 85 BROOKLINE AV FEKE 10/31/2011 PERFORATED PIPE11142 659 WASHINGTON ST CENT 10/31/2011 PERFORATED PIPE10265 5165 WASHINGTON ST WROX 11/2/2011 CULTEC CHAMBER11253 2 LINWOOD ST ROXB 11/2/2011 DRYWELL10076 12 PRIESING ST JAPL 11/3/2011 DRYWELL11222 1833 CENTRE ST JAPL 11/4/2011 DRYWELL11202 106-108 CHESTNUT AV JAPL 11/7/2011 DRYWELL11134 44-46 RUTHERFORD AV CHAR 11/8/2011 CULTEC CHAMBER11198 111 WALDEMAR AV EBOS 11/8/2011 EXISTS TYPE UNKNOWN07165 606 EAST FOURTH ST SBOS 11/9/2011 LEACHING BASIN11067 69 THOMAS PARK SBOS 11/10/2011 DRYWELL10260 272-274 LAMARTINE ST JAPL 11/16/2011 DRYWELL11268 165 NEWBURY ST BBBH 11/16/2011 CULTEC CHAMBER11272 865 EAST FIRST ST SBOS 11/16/2011 CULTEC CHAMBER11264 33-35 BEAVER PL BBBH 11/29/2011 LEACHING BASIN11265 225 WEST THIRD ST SBOS 11/29/2011 DRYWELL11233 1426 HYDE PARK AV HYDE 11/30/2011 DRYWELL11266 6 BELLAIRE RD WROX 11/30/2011 CULTEC CHAMBER11281 31 KNOLL ST ROSL 12/1/2011 CULTEC CHAMBER11295 70-72 COMO RD HYDE 12/6/2011 DRYWELL11308 1434 HYDE PARK AV HYDE 12/6/2011 DRYWELL11020 5 DWIGHT ST SEND 12/7/2011 CULTEC CHAMBER11059 121-125 BROOKLINE AV FEKE 12/7/2011 CULTEC CHAMBER11299 132 MARLBOROUGH ST BBBH 12/7/2011 CULTEC CHAMBER07250 580 WASHINGTON ST CENT 12/8/2011 UNKNOWN11249 18-20 ZAMORA ST JAPL 12/8/2011 DRYWELL11300 52-54 RUTHERFORD AV CHAR 12/8/2011 CULTEC CHAMBER11224 14-16 ZAMORA ST JAPL 12/9/2011 DRYWELL08204 4-6 NEWBURY ST BBBH 12/12/2011 EXISTS TYPE UNKNOWN11306 145 PUTNAM ST EBOS 12/12/2011 DRYWELL11311 5-7 SAINT MARK ST JAPL 12/12/2011 CULTEC CHAMBER11312 10 BYRON ST BBBH 12/12/2011 CULTEC CHAMBER11310 17 GREENWICH PARK BBBH 12/13/2011 CULTEC CHAMBER11325 6 ARROW ST CHAR 12/13/2011 CULTEC CHAMBER11286 728-740 TREMONT ST SEND 12/15/2011 DRYWELL08045 354-364 LONGWOOD AV FEKE 12/16/2011 LEACHING BASIN11277 309 MARLBOROUGH ST BBBH 12/16/2011 LEACHING BASIN11196 11 WYMAN ST JAPL 12/19/2011 LEACHING BASIN11284 1033 MASSACHUSETTS AV ROXB 12/19/2011 CULTEC CHAMBER07296 341 GALLIVAN BLVD SDOR 12/23/2011 DRYWELL11302 750 ALBANY ST SEND 12/23/2011 PERFORATED PIPE11335 185 WEST BROOKLINE ST SEND 12/23/2011 DRYWELL11327 360 WEST SECOND ST SBOS 12/29/2011 DRYWELL07233 368 CONGRESS ST SBOS 12/30/2011 DRYWELL11093 160 MASSACHUSETTS AV FEKE 12/30/2011 PERFORATED PIPE11285 STANHOPE ST BBBH 12/30/2011 DRYWELLPage 21

Table 3 - 5Private Particle Separators Approved in 2011PROJECT # ADDRESS #STREET NAME SIGNATURE DATE10141 278 BLUE HILL AV 1/5/201110083 55 GREW AV 1/13/201110205 129 LAKE ST 1/13/201111022 540 PARKER ST 3/11/201111035 125 WESTERN AV 3/31/201111045 11-13 HOWELL ST 4/19/201110344 225 CENTRE ST 4/20/201111026 11 FAN PIER BLVD 4/20/201111048 103 WARD ST 4/29/201110323 3840 WASHINGTON ST 4/30/201110297 18 CHERITON RD 5/3/201111078 360 MARLBOROUGH ST 5/3/201110324 3815 WASHINGTON ST 5/3/201111027 110 EDGEMERE RD 5/9/201111082 118 WEST NEWTON ST 5/12/201110317 182 WESTERN AV 5/12/201111031 11 TREMONT ST 5/19/201111081 122 BAY STATE RD 6/1/201111086 65 BRAINERD RD 6/21/201111097 74-76 CHURCH ST 6/24/201111010 58 MOORE ST 6/24/201111046 291 SAINT BOTOLPH ST 7/12/201111066 972 AMERICAN LEGION HWY 7/15/201111218 337-345 BELGRADE AV 8/16/201111074 54, 56, 58 BARTLETT ST 8/18/201111080 21-35 WARREN ST 8/24/201111138 637 WASHINGTON ST 8/25/201111069 100 WILLIAM T MORRISSEY BLVD 8/25/201111050 41 MEDFORD ST 9/8/201110179 415 NEPONSET AV 9/22/201111223 168 WESTERN AV 10/5/201111148 20 WAINWRIGHT ST 10/18/201111049 3A - 3J DORCHESTER ST 10/20/201111142 659 WASHINGTON ST 10/31/201107233 368 CONGRESS ST 12/30/2011Page 22

Infiltration/Inflow Control: Newly constructed and substantially renovated buildingsmust be constructed so as to minimize inflow and infiltration to the Commission’swastewater system. Stormwater, including roof runoff, must be kept separate fromsanitary sewage at all times, and the connection of a building storm drain to a sanitarysewer is prohibited.For development projects requiring review under Massachusetts Environmental PolicyAct (MEPA) and that add a significant amount of new wastewater flow to the sewersystem, DEP currently requires a reduction of 4 units of infiltration or inflow for eachnew unit of wastewater added. The Commission supports the DEP in this requirement.Developers of large projects can propose their own I/I reduction measures and submitthem for review and approval by the Commission; they can select I/I reduction projectsfrom a database being developed by the Commission; or they can pay a fee to theCommission in lieu of implementing an I/I reduction project.Erosion and Sedimentation Control: Under the Sewer Use Regulations, anyone seekingto construct, repair or modify a sewer or storm drain service connection to theCommission’s system, or to discharge under a Drainage Discharge Permit, may berequired to prepare and implement an Erosion and Sedimentation Control Plan to preventthe introduction of sediments into the Commission’s sewers and storm drains. Erosionand sediment control is also reviewed by the City of Boston’s Conservation Commissionwhen the project falls within its jurisdiction.Fuel Dispensing Areas: Under the Commission’s Requirements for Site Plans,stormwater runoff from fuel dispensing areas not covered by a canopy or other type ofroof or enclosure must discharge through a particle separator or an approved oil trapbefore discharging to the Commission’s storm drainage system or receiving waters.Catch Basin Castings: Commission contractors are required to install metal castings witha “Don’t Dump” message on sidewalks near new or reconstructed catch basins. BostonCity contractors also install the castings when new sidewalks are installed. The castingsare provided to city hired contractors by the Commission at no cost. The Commissionrequires that private developers install permanent “Don’t Dump” catch basin castingsnext to any new catch basin installed as part of their projects. The developers, as well asother parties interested in obtaining the castings may purchase them from theCommission’s vendor. In 2011, the Commission issued 664 catch basin castings tocontractors and other parties. Of those issued, 415 were for Boston Harbor, 126 for theCharles River and 123 were for the Neponset River.b. NPDES Stormwater Permits for ConstructionDevelopers of projects involving disturbances of land of one acre or more are required toobtain an NPDES General Permit for Construction from the Environmental ProtectionAgency and the Massachusetts Department of Environmental Protection. It is theresponsibility of the owner of the development or of the construction contractor to obtain3 - 23

the necessary NPDES General Permit for Construction. The Commission informsdevelopers and construction contractors of this requirement through comment letterssubmitted to the MEPA Unit and the BRA (described below) for Environmental ImpactReports. There is also information pertaining to the EPA’s requirement for an NPDESGeneral Permit for Construction on the Commission’s website at www.bwsc.org.The Boston Inspectional Services Department is responsible for the inspection ofconstructions sites within Boston. Also, the City of Boston Public Works Departmenthas a Construction Inspection Unit (CIS) which inspects the construction sites of utilityand private contractors located within the public way. The Commission’s EngineeringField Services staff will respond to reports of un- permitted discharges from constructionsites. Enforcement action is taken as warranted by the nature of the discharge.c. Development/Redevelopment and Coordination with Municipal AgenciesThe Commission’s NPDES Stormwater Permit requires the Commission to “assist,coordinate, and cooperate” with city departments and agencies to ensure thatdevelopment projects within Boston are conditioned on due consideration of stormwaterquality impacts, that they conform to applicable state and local stormwater requirements,and that negative impacts to stormwater quality during the time construction is underwayare prevented.The Commission reviews environmental impact reports and notices of project changesfor projects in Boston submitted to the Massachusetts Environmental Policy Act (MEPA)Unit and the Boston Redevelopment Authority (BRA). Comments were submitted to theMEPA Unit, BRA and/or other parties for thirty-five (35) projects in 2011. In mostcases, copies of the letters were also sent to the Boston Environment Department.Letters for eight (8) projects contained comments regarding the Commissionrequirements for particle separators. Letters for twenty-eight (28) projects containedcomments about the Commission’s requirement for retaining stormwater on site. Lettersfor thirty-three (33) projects contained comments regarding the requirement forStormwater Management Plans. Thirty (30) letters contained comments regarding therequirement for 4 to 1 I/I reduction. If appropriate, the letters informed the proponentthat a Drainage Discharge Permit may be required for any temporary or permanent nonstormwaterdischarge to the drainage system.3.4 ROADWAYSAs contained in its enabling act, the Commission’s authority is limited to the operationand maintenance of the water distribution system and the wastewater collection andstormwater drainage systems which serve the City of Boston. The Commission’sjurisdiction does not extend to the operation and maintenance of roadways.Through informal communications with officials from agencies having the responsibilityfor the management of city roadways, the Boston Public Works Department (PWD), the3 - 24

state Department of Conservation and Recreation (DCR), and the MassachusettsDepartment of Transportation, (Mass DOT), the Commission learned that agencyofficials are well aware of the environmental issues relating to roadway management,specifically the use of roadway deicing chemicals and the benefits of frequent streetsweeping.a. City of Boston Snow Removal and Road Deicing PracticesSnow plowing and road deicing of most of the public roads in Boston are theresponsibility of the PWD. PWD officials have emphasized that public safety is theirprimary concern in determining how much sand and salt is applied to roadways and thatweather conditions dictate application levels; if the roads are icy and snow covered, sandand salt must be applied to produce a clear and dry roadway surface. The public safetyissue is balanced by the fact that the more deicing chemicals are used, the greater the costto the City. Therefore, to keep costs at a minimum, the PWD uses only the amount ofchemical needed to achieve the job.The PWD performs some of the snow removal operations on city streets and also hassnow removal contracts. Snow is plowed to the side of the streets, but is not typicallyremoved. A sodium chloride salt/sand mixture is used as a deicing agent, and applicationrates vary based on temperature and precipitation. Contractors use the City’s supply ofsalt and sand during deicing operations.b. City of Boston Street CleaningSweeping of city owned streets is conducted by the PWD or by its contractors.According to the PWD, the City has two programs for street sweeping: Posted StreetCleaning and Non-posted Street Cleaning. All non-posted streets are cleaned once aweek or more if necessary. The Posted Sweeping Program is separated between a NightProgram and a Daily Program. Sweepers also clean up before and after special events,such as parades, road races and neighborhood festivals.The Night Sweeping Program includes an area from Massachusetts Avenue to theWaterfront that is swept on a nightly basis year round. The Night Sweeping Programalso covers the City’s major arterial routes throughout the City, which are swept once aweek at night year round.The Daily Street Sweeping Program typically operates from April 1 st through November30 th . PWD recently expanded the Daily Street Sweeping Program in the North End andSouth End, from March 1 st through December 31 st . Weather and budget conditionspermitting, the program may begin earlier in the season and extend later into the fall.Each side of a posted city street on the Daily Street Cleaning Program is cleaned onceevery other week. Additional street sweepers may be contracted and city sweepers runmore frequently during the fall leaf season.3 - 25

Parking bans (signs) posted on streets serve to educate the public and to have vehiclesremoved on certain days so sweeping can be thorough. The parking bans are enforced bythe Boston Transportation Department. If cars are not removed on designated days,owners can be fined. The fine for not removing cars on the designated days is currently$40, plus and additional $90 for tow, storage and fees.Contractors are responsible for providing their own sweeping equipment and for disposalof the collected material. Since 2009, PWD requires its contractors to use vacuum typesweepers that have dust control systems and do not require water to operate. Becausethese types of sweepers don’t require water, they can be operated year round, even infreezing conditions. The vacuum sweepers are believed to be more efficient at collectingsmaller grit particles and dust. The new sweepers have saved the city thousands ofgallons in water usage, and are in compliance with DEP regulations.The PWD also has several small broom sweepers used to sweep small alleys andsidewalks. These sweepers are typically assigned to the more densely developed parts ofthe City, such as Chinatown, Downtown Crossing, and the North End.The composition of the material swept up varies seasonally with sand and sediments fromwinter deicing activities being most evident in the spring, leaf litter during the fallmonths, and light litter predominating during the summer.c. DCR Street Sweeping, Snow Removal and Road Deicing PracticesRoads maintained by the DCR, such as the VFW Parkway, Storrow Drive, the Riverway,and the Fenway are served primarily by separate storm drains, which are owned andmaintained by the DCR. DCR drainage systems in Boston are subject to the EPA’sStormwater Phase 2 program. DCR’s stormwater management program includes “goodhousekeeping” measures, such as street sweeping of parkways, cleaning street drains andassociated drainage systems and using control measures to protect sensitive receivingwaters. Snow removal and deicing of DCR owned roads are managed jointly by the DCRand Mass DOT.3.5 FLOOD CONTROL PROJECTSReceiving water and stormwater quality impacts are considered whenever theCommission undertakes capital improvements to the drainage system, including thoserelating to flood control. For each project, consideration is given to re-designing orretrofitting the drainage system to provide additional pollutant removal capability.a. Muddy River Flood Control ProgramThis project involves a multidisciplinary approach to improving the Muddy Riverwatershed and the adjacent parklands, referred to as the Emerald Necklace located inBoston, Brookline and Newton. The project, which is managed by the Boston Parks andRecreation Department and the Town of Brookline, involves measures to increase the3 - 26

hydraulic capacity of the river and implementation of stormwater Best ManagementPractices in the watershed to improve stormwater and receiving water quality.Between 2000 and 2002, the Commission provided $1.5 million in funding to support theproject. Dredging of the Charlesgate portion of the Muddy River was completed in 2002.Also in 2002, the Commission reviewed the Draft Environmental Impact Report andsubmitted comments to MEPA in April. The Commission reviewed the FinalEnvironmental Impact Report in April 2003 and no comments were submitted.The Commission continues to advise on best management practices and stormwatermanagement for this program by participating in meetings held with the Boston Parksand Recreation Department, Town of Brookline representatives, consultants responsiblefor implementing the program and the Muddy River Citizens Advisory Committee.3.6 PESTICIDE, HERBICIDE AND FERTILIZER APPLICATIONUnder the Stormwater Permit, the Commission was required to cooperate with municipalagencies to evaluate existing measures to reduce the discharge of pollutants related to theapplication of pesticides, herbicides and fertilizers (PHFs) applied by municipal or publicagencies. The Commission was also required to evaluate the necessity to implementcontrols to reduce the discharge of pollutants related to the application and distribution ofPHFs by commercial and wholesale distributors and applicators. The Commissionperformed evaluations of existing programs and data in 2001, and reported the results inthe 2001 Stormwater Management Report. From the results of the evaluation, it wasconcluded that additional monitoring and controls for PHF use by municipal agencies andtheir contractors and for commercial and wholesale distributors was not warranted.Discussion of this analysis can be found in Section 3.6 of the 2009 StormwaterManagement Report.3.7 PUBLIC EDUCATIONa. Billing InsertsSeveral times a year, in the monthly water and sewer bill, the Commission providescustomers with an informational newsletter called Currents. The newsletter is aimed atproviding customers with useful information concerning the Commission’s programs andactivities. Issues of Currents announce upcoming events such as the Commission’scommunity outreach meetings and city sponsored events such as household hazardouswaste, oil and paint collections. In addition, articles feature tips on pollution prevention,and proper disposal of used motor oil, antifreeze, household hazardous materials, yarddebris, pet waste and other wastes.In 2011, the March/April issue of Currents promoted the City’s Household HazardousWaste collection events in May and June. The May/June issue encouraged residents toreport illegal dumping and pick up pet waste to prevent stormwater pollution. TheJuly/August issue of Currents suggested measures for preventing runoff water from car3 - 27

washing from discharging to catch basins. The September/October issue promoted theCity’s fall Leaf and Yard Waste pickup services and the Household Hazardous Wastecollection events in October and November. The November/December issue encouragedcitizens to keep catch basins clear of debris to prevent flooding. In addition, the Aprilwater and sewer bill included an insert promoting the City’s Household Hazardous Wastecollection days in May and June, and on the flip side of the insert, promotion of theCity’s spring leaf and yard waste collection days. Copies of the Currents newsletters andthe April insert are provided at the end of this section.b. Commission Web SiteThe Commission’s web site, located at www.bwsc.org, provides a variety of informationconcerning the Commission’s programs, activities, and requirements. It provides theCommission’s Sewer Use Regulations and Site Plan Requirements, it includes pollutionprevention advice for residents, businesses and construction, and it provides informationconcerning the Commission’s catch basin stenciling program.c. Catch Basin Stenciling and CastingsPublic awareness regarding the connection between catch basins and water quality ispromoted through the Commission’s Catch Basin Stenciling Program. Through the CatchBasin Stenciling, volunteers are mobilized to stencil “Don’t Dump” messages next tocatch basins. Upon request, the Commission coordinates stenciling projects and providesinstruction, stencils, paint, rollers, brooms, informational leaflets, and safety equipment.The Catch Basin Stenciling Program is promoted through the Commission’s web site andbilling inserts and through press releases, community events and outreach meetings,presentations to public schools, and through local watershed associations.Organizations participating in the Commission’s 2011 catch basin stenciling programwere the Boston Harbor Association and the Advent School of Beacon Hill.Commission contractors are required to install metal castings with a “Don’t Dump”message on sidewalks near new or reconstructed catch basins. Boston City contractorsalso install the castings when new sidewalks are installed. The castings are provided tocity hired contractors by the Commission at no cost. The Commission requires thatprivate developers install permanent “Don’t Dump” catch basin castings next to any newcatch basin installed as part of their projects. The developers, as well as other partiesinterested in obtaining the castings may purchase them from the Commission’s vendor.The Commission issued 664 catch basin castings to contractors and other parties in 2011.Of those issued, 415 were for Boston Harbor, 126 for the Charles River and 123 were forthe Neponset River.3 - 28

d. “Scoop the Poop” EducationThe Commission’s May/June 2011 issue of Currents was designed to encourage petowners to clean up after their pets. A copy of the leaflet is provided at the end of thissection.e. DoorhangersThe Commission’s Sewer Use Regulations prohibit the dumping of any material into acatch basin, including any solid waste, construction debris, paint or painting product,antifreeze, hazardous waste, or oil. In many cases, by the time the Commission’sinvestigation crew reaches the location of the reported dumping incident, the violator isalready gone or cannot be confirmed. To address this issue, the Commission hasproduced a door hanger which is distributed in neighborhoods where incidents of illegaldumping have occurred. The door hanger conveys the “Don’t Dump” message andinforms people of the prohibition on illegal dumping. It also serves to alert people tokeep a look out for violators and provides a phone number for reporting illegal dumpers.An example of the doorhanger is provided at the end of this section.f. Stormwater Management Brochure for Small Commercial BusinessesIn 2001, the Commission prepared a brochure on stormwater management for smallcommercial businesses. The brochure is currently available on the Commission’swebsite. The brochure is intended to increase awareness of the relationship betweenimproper disposal of pollutants and contamination of receiving waters. It describesspecific measures that can be taken by business owners and their employees to preventthe discharge of pollutants to the drainage system. The brochure is available and can bedownloaded from the Commission’s website. A copy of the brochure is provided at theend of this section.3.8 SUPPORT FOR WATERSHED AND ENVIRONMENTALAGENCIES AND ORGANIZATIONSEach year the Commission provides funding to Watershed Associations andEnvironmental Organizations to support their water quality monitoring programs andpublic education efforts. The Charles River Watershed Association, Neponset RiverWatershed Association, and the Boston Harbor Association each received $10,000 fromthe Commission in 2011.Support for the EPA, and DEP’s watershed programs is provided on an ongoing basis bythe Commission. As needed, the Commission shares monitoring and rain gauge data,investigates reports of illegal connections or other non-stormwater discharges towaterways, participates in planning meetings, and provides technical advice.3 - 29

Vincent G. Mannering, Executive Director March-April 2011Household GreaseKeep the FOG’s from Creating ClogsFats, oils and grease (FOG) that enter the plumbing system can build upover time to eventually block the entire sewer pipe. Grease blocking thepipes is a serious maintenance problem for both private property ownersand the public sewer system. Sewer line backups are expensive to repairand unpleasant to clean up.It is important that homeowners and tenants are informed as to whatthey can do to minimize the potential problem. Home garbage disposalsdo not keep grease out of the plumbing system. These units only shredsolid material into smaller pieces and do not prevent grease fromsolidifying in the drain.Commercial additives, including detergents that claim to dissolve greasemay pass grease down the line and cause problems in other areas.MOST GREASE IS THEBYPRODUCT OF COOKINGAND IS USUALLY FOUNDIN SUCH THINGS AS:food scrapsmeat fatslardcooking oilbutter and margarinebaking goodssaucesdairy products1 2 3 4 5How Can You Help?The easiest way to solve grease problems and help prevent blockages is tokeep fats,oils and grease out of the sewer system.Here is how:1. Put baskets or strainers in sink drains to catch food scraps and other solids, and emptythe drain basket or strainer into the trash for disposal.2. Scrape food scraps from trays, plates, pots, pans, utensils, and grills and cooking surfacesinto the trash for disposal.3. Pour grease and oil into a can and put it in the trash.4. Never pour grease down sink drains or into toilets.5. Do not put grease down garbage disposals.­ Boston Water and Sewer Commission • 980 Harrison Avenue, Boston, MA 02119 • 617.989.7000

Neighborhood Site LocationsThe Boston Water and Sewer Commission will have arepresentative from the Community Services Departmentat neighborhood locations (see schedule below) to offerassistance. Please make note of the dates and time foreach site.BWSC staff will be available to:• Accept payments (check or money order only—no cash).• Process elderly or disabled persons discount forms.• Arrange payment plans for delinquent accounts.• Resolve billing or service complaints.• Review water consumption data for your property.• Explain BWSC customer programs.HAZARDOUSWASTE DROP-OFFBrightonAllston/Brighton APAC143 Harvard AvenueThursdays 10am–1pm3/24, 4/14CharlestownGolden Age Center382 Main StreetTuesdays 11am–1pm3/29, 4/25 (Monday)ChinatownCCBA90 Tyler StreetThursdays 12 noon–1pm3/10, 4/1 (Friday)DorchesterUphams CornerMunicipal Building500 Columbia RoadFridays 10am–12 noon3/11, 4/15East BostonEast Boston APAC21 Meridian StreetWednesdays 10am–1pm3/2, 3/9, 4/6, 4/13Fields CornerKit Clark Senior Center1500 Dorchester AvenueMondays 10am–1pm3/21, 4/11Hyde ParkHyde ParkMunicipal Building1179 River StreetTuesdays 10am–1pm3/8, 3/22, 4/12, 4/26BWSC HEADQUARTERS980 Harrison Ave.Jamaica PlainJamaica PlainPublic Library12 Sedgwick StreetMondays 10am–1pm3/14, 4/4MattapanMattapan Public Library1350 Blue Hill AvenueFridays 10am–12 noon4/4, 4/8North EndNorth End Public Library25 Parmenter StreetThursdays 10am–12 noon3/3, 4/7RoslindaleGreater RoslindaleMedical andDental Center4199 Washington StreetTuesdays 10am–1pm3/15, 4/19South BostonSB Action Center424 W. BroadwayWednesdays 10am–1pm3/23, 4/27West RoxburyRoche Community Center1716 Centre StreetFriday 10am–1pm3/25, 4/29South End & Roxbury* Residents of the South End andRoxbury are invited to use theBWSC Head quarters as theirNeighborhood Site Location.Monday–Friday 8am–5pmWednesdays 8am–7pmTHE CITY OF BOSTON’S HOUSEHOLDHAZARDOUS WASTE DROP OFF DAYS:May 7, 2011 (9 – 2 P.M.) atUNIVERSITY OF MASSACHUSETTSHARBOR CAMPUS, MORRISSEY BLVD.June 25, 2011 (9 – 2 P.M.) atWEST ROXBURY PUBLIC WORKS YARD315 GARDNER STREET, WEST ROXBURY AT MILLENNIUM PARKFOR BOSTON RESIDENTS ONLYNO COMMERCIAL WASTE ACCEPTEDPROOF OF RESIDENCY REQUIREDFOR MORE INFORMATION CALL THE BOSTON RECYCLINGHOT LINE AT (617) 635-4500Acceptable Household Hazardous Waste ProductsHOUSEHOLDAcidsAerosol cansArtist suppliesCaulkChemistry set chemicalsCreosoteDriveway sealerDry-cell batteriesFiberglass resinsFlammable liquidsFloor care products/wax stripperFurnace cementFurniture, floors,& metal polishesHobby supplies(rubber cement,airplane glue, etc.)Mercury bearing waste(such as fluorescent lamps,Thermostats, thermometers,and mercury switches)Metal cleanersAmmonia cleanersMuratic acidPaints (Latex, oil-based),varnish, stain, shellacpaint strippersPhotography chemicalsPool chemicalsPropane tanksRadiator cleanersRug & upholserty cleanersRust preventativesSealant/Roof cementSolvent adhesives,solvent based cleanersSulfuric acidTurpentine, paint thinnersWood preservativesLAWN/GARDENCesspool cleanersFertilizersFire startersFlammable liquidsFlea/tick powderFungicidesHerbicidesInsecticidesNo-pest stripsPesticidesPoisonsWeed killersBATHROOMAerosol deodorantCosmeticsHair colorMedicineNail polish removerToilet cleanersKITCHEN LAUNDRYBrightenersChlorine bleachDetergentsCleaners(metal & ammonia)Lighter fluidMoth balls/crystalOven cleanersRodent killersSoftenersSpray starchWhitenersAUTOMOBILEAntifreezeBrake fluidCar batteriesCarburetor cleanerDegreasersEngine solventsMotor oil, oil filtersRadiator flushTire cleaners*TIRES collected onlyon HHW DAY!!!!!!!Transmission fluidWaste fluids(gasoline, kerosene)Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • 617.989.7000

Vincent G. Mannering, Executive Director May-June 2011DON’T DUMPHelp Protect Our Water Resources.Stormwater Drains toBoston Harbor andLocal RiversMost catch basins in Boston connectto storm drains that discharge therunoff to the nearest brook, riveror Boston Harbor. Substancescarelessly spilled or dumped onto ourstreets or directly into a catch basincan pollute Boston Harbor and theCharles, Neponset and Mystic Rivers.Report Illegal DumpingThe dumping of any substance into a catch basin is illegal in Boston.Substances like household chemicals, fertilizers, insecticides, automotivefluids, oils, paints, pet waste and commercial waste are prohibited.Anything dumped into a catch basin can travel through storm drainsto local streams, rivers and into Boston Harbor. These pollutants harmwater quality and can kill aquatic life.To report illegal dumping, contact Boston Water and Sewer Commissionimmediately at (617) 989-7000.­ Boston Water and Sewer Commission • 980 Harrison Avenue, Boston, MA 02119 • (617) 989-7000

• Apply fertilizers and garden chemicals sparingly and according to directions.10 Thingsto PreventPollution ofStormwaterRunoff• Control soil erosion on your property by planting ground cover and stabilizing erosion prone areas.• Compost your yard waste to reduce volume and recycle nutrients back into your yard.• Use the least toxic pesticides, follow labels and learn alternative ways to prevent pest problems.• Direct downspouts away from paved surfaces so water can saturate the earth; consider a rain garden to capture runoff.• Clean up spilled brake fluid, oil, grease and antifreeze. Do not hose them into the street where they caneventually reach local waterways. Recycle your motor oil.• Never dump anything down catch basins or in local waterways.• Pick up after your pet. Storm water can carry the waste into the catch basins.Stormwater Runoff is generated when rain and snowmelt donot soak into the ground but flow over land or impervious surfaces,accumulating pollutants that could adversely affect water quality.RUNOFFFROMROOFScoop the PoopLAWN RUNOFFGUTTERRUNOFFDog owners can help prevent contamination oflocal waterways, parkland, and beaches bypicking up after their dogs. Dog waste should beplaced in a proper trash receptacle. Never throw rubbishinto the stormwater grates in the street. These catchbasins are for stormwater.STREETRUNOFFSTORMWATER RUNOFFENDS UP IN LOCALSTREAMS, RIVERSAND THEBOSTON HARBOR.STREETRUNOFFDuring rainy weather, dog waste that is not scooped up iscarried in stormwater runoff to catch basins. Catch basinsconnect to Boston’s storm drain system that dischargesto Boston Harbor as well as the Charles, Muddy, Mysticand Neponset Rivers. Dog waste pollutes beaches andparklands in addition to being unpleasant and unhealthyfor swimmers, sunbathers, and aquatic life.The Boston Water and Sewer Commission is dedicated toimproving the harbor and ensuring cleaner, more enjoyablerivers and beaches. Please help by picking up after yourpet and disposing of the waste properly.Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000

Vincent G. Mannering, Executive Director July-August 2011Protect Your Community:The illegal operation of fire hydrants isdangerous and can result in loss of pressure,breaks and other malfunctions during anemergency, when response time is critical.Additionally, all water usage in Boston, exceptfor fire fighting, water maintenance work,and street sweeping, must be metered andthe charges paid. For other uses, like waterneeded during construction, the Boston Waterand Sewer Commission (BWSC) issues specialpermits and meters to contractors.There are over 13,000 hydrants throughout theCity of Boston. These hydrants are designed toprovide water for fire protection and are a criticalcomponent of the Boston Fire Department’s abilityto protect city homes and businesses. Illegal useof hydrants can impede the emergency responseof firefighters!Unauthorized use of hydrants is considered watertheft! Lost water is costly, and the burden isshared by every paying customer. With summertemperatures rising and people looking for waysto cool off, BWSC encourages residents to seekalternative water activities and keep our city safe.Report Open Fire HydrantsReport Open Fire HydrantsHelp stop water theft and control thecost of water by reporting open hydrants.If you see a hydrant being used withouta water meter, please call 617-989-7000to report the location.­ Boston Water and Sewer Commission • 980 Harrison Avenue, Boston, MA 02119 • (617) 989-7000

Neighborhood Site LocationsThe Boston Water and Sewer Commission will have arepresentative from the Community Services Department atneighborhood locations (see schedule below) to offerassistance. Please make note of the dates and time foreach site.BWSC staff will be available to:• Accept payments (check or money order only—no cash).• Process elderly or disabled persons discount forms.• Arrange payment plans for delinquent accounts.• Resolve billing or service complaints.• Review water consumption data for your property.• Explain BWSC customer programs.BrightonAllston/Brighton APAC141 Harvard AvenueThursdays 10am–1pm7/21, 8/18CharlestownGolden Age Center382 Main StreetTuesdays 11am–1pm7/26, 8/30ChinatownCCBA90 Tyler StreetThursdays 12 noon–1pm7/14, 8/11DorchesterUphams CornerMunicipal Building500 Columbia RoadFridays 10am–12 noon7/15, 8/12East BostonEast Boston APAC21 Meridian StreetWednesdays 10am–1pm7/6, 7/13, 8/3, 8/10Fields CornerKit Clark Senior Center1500 Dorchester AvenueMondays 10am–1pm7/18, 8/22Hyde ParkHyde ParkMunicipal Building1179 River StreetTuesdays 10am–1pm7/5, 7/19, 8/9, 8/23Jamaica PlainJamaica PlainPublic Library12 Sedquick StreetMondays 10am–12 noon7/11, 8/15MattapanMattapan Public Library1350 Blue Hill AvenueFridays 10am–12 noon7/8, 8/5North EndNorth End Public Library25 Parmenter StreetThursdays 10am–12 noon7/7, 8/4RoslindaleGreater RoslindaleMedical andDental Center4199 Washington StreetTuesdays 10am–1pm7/12, 8/16South BostonSB Action Center424 W. BroadwayWednesdays 10am–1pm7/27, 8/24West RoxburyRoche Community Center1716 Centre StreetFridays 10am–1pm7/29, 8/26South End & Roxbury* Residents of the South End andRoxbury are invited to use theBWSC Head quarters as theirNeighborhood Site Location.Did You Know?The simple activity of washing your carcan actually be harmful to the environment.Contamination can arise from polluted rinse waterrunning over pavement into storm drains, whicheventually drain to local rivers and Boston Harbor.The chief pollutants in wash water include phosphates,oil, grease and hydrofluoric acids. These chemicalscan be harmful to living organisms and causeexcessive growth of nuisance plants in water bodies.If you choose to wash your car at home or on thestreet, here are some measures that you can take tominimize the water quality impact:• If possible, use biodegradable, phosphatefreewater-based detergents.• Always empty wash buckets into sinksor toilets• Minimize water usage. Use a spray guntype hose with flow restriction to minimizewater volume and runoff.• Wash in an area that absorbs water, suchas gravel or grass. This can filter thewater before it enters groundwater.• Use a commercial car wash. Most carwashes reuse wash water several timesbefore sending it to treatment plant.Washing one car may not seem to be environmentallyadverse, but collectively, car washing is a sourceof pollution to our local waterways. When choosinghow to keep your vehicle clean this season, considerthe harm residential car washing can have on ourwater resources.BWSC HEADQUARTERS980 Harrison Ave.Monday–Friday 8am–5pmWednesdays 8am–7pmBoston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000

Vincent G. Mannering, Executive Director September – October 2011Boston’s Leaf and YardWaste CollectionOctober 17 to December 2, 2011For more information, call the Mayor’s Hotline at 617-635-4500.Guidelines:Leaves, grass and twigs canbe placed in paper leaf bagsor open barrels labeled“Yard Waste” (no plastic bags).“Yard Waste” stickers forbarrels are available by calling617-635-4500 or online atwww.cityofboston.gov.(2 per household)Tie branches with string 3 ft.maximum in length. Do not putbranches in barrels.Put barrels, bags and brancheson the curb by 7:00 am on yourRecycling Day from October 17through December 2, 2011.Help to reduce urbanstormwater pollutionStormwater pollutants originate from manydifferent sources ranging from fuel and oilon our roads, to litter dropped on our streets tosediment washed from construction sites. Thereare four main types of stormwater pollution:• Animal Feces for example dogand pet waste• Litter for example cigarette butts, cans,food wrappers, plastic bags or paper• Natural Pollution for example leaves,garden clippings and soil erosion• Chemical Pollution for examplefertilizers, oil and detergents.You can help prevent urban pollutionPiles of leaves can actually become a source ofwater pollution. Leaves can make water growmurky by releasing nutrients that can contributeto the accelerated growth of algae. The autumnrain carries this water into the drainage system,which goes directly to our waterways. Excessivealgae can kill fish and other aquatic life.Moreover, standing leaves that sit along curbsblock catch basins which can lead to flooding ofroadways.Every year the Boston Public Works Departmenthelps city homeowners recycle leaves and yardwaste by providing free curbside collection.This waste is composted into a natural fertilizerfor plants.Note: There is no yard waste pick up betweenOctober 2 – 15. Residents should hold theiryard waste for the collection days.Boston Water and Sewer Commission • 980 Harrison Avenue, Boston, MA 02119 • (617) 989-7000

Neighborhood Site LocationsThe Boston Water and Sewer Commission will have arepresentative from the Community Services Departmentat neighborhood locations (see schedule below) to offerassistance. Please make note of the dates and time foreach site.BWSC staff will be available to:◆ Accept payments (check or money order only—no cash).◆ Process elderly or disabled persons discount forms.◆ Arrange payment plans for delinquent accounts.◆ Resolve billing or service complaints.◆ Review water consumption data for your property.◆ Explain BWSC customer programs.BrightonAllston/Brighton APAC143 Harvard AvenueThursdays 10am–1pm9/22, 10/20CharlestownGolden Age Center382 Main StreetTuesdays 11am–1pm9/27, 10/25ChinatownCCBA90 Tyler StreetThursdays 12 noon–1pm9/8, 10/13DorchesterUphams CornerMunicipal Building500 Columbia RoadFridays 10am–12 noon9/16, 10/14East BostonEast Boston APAC21 Meridian StreetWednesdays 10am–1pm9/7, 9/14, 10/5, 10/12Fields CornerKit Clark Senior Center1500 Dorchester AvenueMondays 10am–1pm9/19, 10/17Hyde ParkHyde ParkMunicipal Building1179 River StreetTuesdays 10am–1pm9/6, 9/20, 10/4, 10/18Jamaica PlainJamaica PlainPublic Library12 Sedgwick StreetMondays 10am–12 noon9/26, 10/24MattapanMattapan Public Library1350 Blue Hill AvenueFridays 10am–12 noon9/2, 10/7North EndNorth End Public Library25 Parmenter StreetThursdays 10am–12 noon9/1, 10/6RoslindaleGreater RoslindaleMedical andDental Center4199 Washington StreetTuesdays 10am–1pm9/13, 10/11South BostonSB Action Center424 W. BroadwayWednesdays 10am–1pm9/28, 10/26West RoxburyRoche Community Center1716 Centre StreetFriday 10am–1pm9/23, 10/21South End & Roxbury* Residents of the South End andRoxbury are invited to use theBWSC Head quarters as theirNeighborhood Site Location.Do Your Part to Protectthe EnvironmentSome chemicals, household products and even yard waste canharm the environment if not properly disposed. Boston residentscan drop off household hazardous waste to be recycled. Everyonecan help to protect the environment from harmful waste.The City of Boston’s HouseholdHazardous Waste Drop Off Days:October 29, 2011 (9 am– 2 pm)at University of Massachusetts, BostonNovember 19, 2011 (9 am– 2 pm)at West Roxbury Public Works Yard315 Gardner Street, West Roxbury at Millennium Park• For Boston residents only• No commercial waste accepted• Proof of residency required.For more information please call the Mayor’s Hotlineat (617) 635-4500.Unacceptable Household Hazardous WasteThe following is a list of materials which will notbe accepted as hazardous waste:Explosives, medical waste (biochemical and pharmaceutical),prescription medication, PCB’s, radioactive materialand materials with no hazardous constituents.Free Paper ShreddingBoston Residents OnlyUp to 10 boxesSaturday, October 29, 20119 am to 3 pmBayside Expo Parking Lot200 Mt. Vernon St.Dorchester, MA 02125Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000

Vincent G. Mannering, Executive Director November – December 2011SAVE WATER, $AVE MONEYA leaky toilet can be costly!Your toilet is by far the biggest source of water use inyour home. A malfunctioning toilet can waste hundreds ofgallons of water. A toilet leak of any magnitude can costyou money. In order to assist customers in monitoringwater usage, BWSC provides an easily accessible meansto track consumption.All it takes is to log on to our website, www.bwsc.org.Here you can see exactly how much water your propertyis consuming and identify the presence of leaks. If thegraphic display of your account looks like this, you mayhave a toilet or other significant leak. Usually these leaksare easily repaired and will quickly pay for themselves inwater savings.If you have a leaking toilet FIX IT!Use the BWSC website to monitor your water usagewww.bwsc.org.Keep Catch Basins Clear, Keep Roads SafeAs the autumn leaves begin to fall, the Boston Water and SewerCommission would like to remind customers to keep storm drainsfree of leaves and other debris. Catch basins and the connectedstorm drains are crucial to removing stormwater and preventingstreet flooding. You can help the water flow with the following tips:■ When you are clearing your sidewalk or driveway, dispose ofwaste in trash receptacles instead of sweeping them into thegutters and catch basins.■ If leaves or other debris are blocking a catch basin near yourhome, please rake them away!Boston Water and Sewer Commission • 980 Harrison Avenue, Boston, MA 02119 • (617) 989-7000

BrightonAllston/Brighton APAC143 Harvard AvenueThursdays 10am–1pm11/17, 12/15CharlestownGolden Age Center382 Main StreetTuesdays 11am–1pm11/22, 12/27ChinatownCCBA90 Tyler StreetThursdays 12 noon–1pm11/10, 12/8DorchesterUphams CornerMunicipal Building500 Columbia RoadFridays 10am–12 noon11/18, 12/9Neighborhood Site LocationsThe Boston Water and Sewer Commission will have a representative from the Community Services Departmentat neighborhood locations (see schedule below) to offer assistance.Please make note of the dates and time for each site.BWSC staff will be available to:• Accept payments (check or money order only – no cash).• Process elderly or disabled persons discount forms.• Arrange payment plans for delinquent accounts.East BostonEast Boston APAC21 Meridian StreetWednesdays 10am–1pm11/2, 11/9, 12/7, 12/14Fields CornerKit Clark Senior Center1500 Dorchester AvenueMondays 10am–1pm11/21, 12/12Hyde ParkHyde ParkMunicipal Building1179 River StreetTuesdays 10am–1pm11/1, 11/15, 12/6, 12/20Jamaica PlainJamaica PlainPublic Library12 Sedgwick StreetMondays 10am–12pm11/14, 12/19• Review water consumption data for your property.• Resolve billing or service complaints.• Explain BWSC customer programs.MattapanMattapan Public Library1350 Blue Hill AvenueFridays 10am–12 noon11/4, 12/2North EndNorth End Public Library25 Parmenter StreetThursdays 10am–12 noon11/3, 12/1RoslindaleGreater RoslindaleMedical andDental Center4199 Washington StreetTuesdays 10am–1pm11/8, 12/13South BostonSB Action Center424 W. BroadwayWednesdays 10am–1pm11/16, 12/21West RoxburyRoche Community Center1716 Centre Street10am–1pmMonday, 11/28Friday, 12/16South End & Roxbury* Residents of the South End andRoxbury are invited to use theBWSC Head quarters as theirNeighborhood Site Location.BWSC HEADQUARTERS980 Harrison Ave.Monday–Friday 8am-5pmWednesdays 8am - 7pmBoston’s Leaf and Yard Waste CollectionLeaves can become slippery and heavy when wet. Removing leaveskeeps the walkway safe and helps stormwater properly drain into thecatch basins. Every year the Boston Public Works Department helpscity homeowners recycle leaves and yard waste by providing freecurbside collection. When recycled and composted, this yard wasteis used as a natural fertilizer for Boston’s community gardens.2011 Collection on Recycling Days for 6 WeeksGuidelines■ Leaves, grass and twigs can be placed in paper leaf bagsor open barrels labeled “yard waste” (no plastic bags).■ “Yard Waste” stickers for barrels are available by calling 617-635-4500.■ Tie branches with string, 3 ft. maximum length.Do not put branches in barrels.■ Put barrels, bags and branches on the curb by 7:00 am on yourRecycling Day from October 17 through December 2, 2011.For more information, contact the Mayor’s 24-Hour Hotlineat 617-635-4500.Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000

DON’T DUMP!A catch basin dumping violation has been reportedin your neighborhood!The substance checked below has been found in a catch basinor storm drain near your home or business:Motor oilAntifreezeGreasePaintConstruction debrisFresh concrete, mortar or cementYard wasteChemicalsPaper or garbagePet wasteOtherSubstances dumped into catch basins may discharge directly tostreams, rivers and Boston Harbor, causing pollution of localwaterways. The dumping of any material into catch basins isprohibited under the Boston Water and Sewer Commission’sSewer Use Regulations. Catch basin dumping violations carrysevere penalties, up to $5,000 per incidence.DON’T DUMP!A catch basin dumping violation has been reportedin your neighborhood!The substance checked below has been found in a catch basinor storm drain near your home or business:Motor oilAntifreezeGreasePaintConstruction debrisFresh concrete, mortar or cementYard wasteChemicalsPaper or garbagePet wasteOtherSubstances dumped into catch basins may discharge directly tostreams, rivers and Boston Harbor, causing pollution of localwaterways. The dumping of material into catch basins isprohibited under the Boston Water and Sewer Commission’sSewer Use Regulations. Catch basin dumping violations carrysevere penalties, up to $5,000 per incidence.TO REPORT A CATCH BASIN DUMPINGINCIDENT, CALL:BOSTON WATER AND SEWER COMMISSION(617) 989-7000TO REPORT A CATCH BASIN DUMPINGINCIDENT, CALL:BOSTON WATER AND SEWER COMMISSION(617) 989-7000

Compliance TipsPlanning and Preparation• Disturb the smallest area possible.• Avoid steep or unstable slopes and areas with soils susceptible to erosion.• Time construction activities to limit the impact from seasonal climate changes or severe weather events.• Don’t mix other waste streams (wash waters, dewatering) with storm water.• Prepare a storm water pollution prevention plan prior to submitting a Notice of Intent (NOI).• Incorporate all applicable local and/or state sediment and erosion controls (storm water management) into yourpollution prevention plan.• Install a sediment basin at sites with common drainage areas that serve ten or more disturbed acres. The basinshould provide at least 3,600 cubic feet of storage for every acre drained.Notice of Intent• Owner, developer, or general contractor should submit the initial NOI to EPA with a copy sent to BWSC at least 7days prior to clearing, grading or grubbing activities. All other parties involved in the activities should submit aNOI as a co-permitted as necessary.• Submit a copy of the pollution prevention plan to BWSC.During Construction• Stabilize disturbed areas that will not be re-disturbed for 21 days or more within 14 days of the last disturbance.• Install sediment basins, traps, or silt fences along the down slope and side slope perimeter for drainage areas lessthan 10 acres.• Conduct site inspections every 7 days within 24 hours of a storm of 0.5 inches or greater. All disturbed areas,material and equipment storage areas, site entrances and exists, and erosion and sediment controls must beinspected. Deficiencies should be corrected within 7 days of the inspection.• Keep your pollution prevention plan on site during construction and until final stabilization.Terminating Coverage• Retain the plan and all reports for 3 years after final stabilization. Final stabilization means all soil disturbingactivities are complete and that a uniform perennial vegetative cover (i.e. density of 70 percent of the cover forunpaved areas not covered by permanent structures) has been established or that equivalent permanent stabilizationmeasures have been employed (e.g.,) riprap, gabions, or geotextiles).• Submit Notice of Termination to EPA with a copy sent to BWSC upon final stabilization.For More InformationFor copies of EPA’s General Permit for ConstructionActivities or any questions you may have, contact EPARegion 1, Thelma Murphy at Tel.:(617) 918-1615 ore-mail at Murphy.thelma@epa.gov.For questions concerning the Boston Water and SewerCommission’s requirements for construction relateddischarges and for new and reactivated service connections,contact the Commission’s Engineering CustomerServices Division at (617) 989-7000 or view theCommission’s website at www.bwsc.org.Available Documents and Guidance:• Storm Water Management for Construction Activities:Developing Pollution Prevention Plans and Best ManagementPractices (EPA-833-R-92-005, October 1992) can be found at:http://www.epa.gov/npdes/pubs/owm0307.pdf• NPDES General Permit for Storm Water Discharges fromConstruction Activities - Fact Sheet can be found at:http://www.epa.gov/npdes/pubs/cgp2003_fs.pdf• EPA New England Fact Sheet: Storm Water Permit Basics:The Federal (EPA) Storm Water Permit for Large and SmallConstruction Projects and EPA New England Guidance: StormWater at Construction Sites - A Guide to Federal Requirementscan be found at http://www.epa.gov/npdes/stormwater under“Construction Activities”.• Federal Register, August 4, 2003 (68 FR 45817) -FinalReissuance of the NPDES Storm Water Construction GeneralPermit for the Commonwealth of Massachusetts and IndianCountry in Massachusetts.• Boston Water and Sewer Commission’s Regulations Governingthe Use of Sanitary and Combined Sewers and StormDrains, the Requirements for Site Plans and informationconcerning Drainage Discharge Permits can be obtained bycontacting the Engineering Customer Services Division of theCommission at (617) 989-7000, or at http://www.bwsc.org.For additional copies of this brochure, contactBoston Water andSewer Commission980 Harrison AvenueBoston, MA 02119(617) 989-7000www.bwsc.orgStorm WaterPermits atConstructionSitesAugust 2004This brochure by the Boston Water and Sewer Commissionis based on the fact sheet “Storm Water Permits atConstruction Sites” dated July 1995 prepared by NewEngland Interstate Water Pollution Control Commission(NEIWPCC) with funding provided through a grant fromEPA-New England (CP001748).

What is Storm Water?Do I Need a Storm Water Permit?What To Do If You Need a PermitStorm Water Pollution Prevention PlansStorm water runoff is precipitation (rain or snow melt)that cannot be absorbed by the soil and, instead, washesoff the surface of the land. As stormwater flows over aconstruction site, it picks up pollutants may be transportedinto nearby surface waters by the runoff and canimpair sport and commercial fishing, restrict swimming,and affect the navigability of many of our nation’s waters.Preventing soil erosion and sedimentation is an importantresponsibility at all construction sites.In addition to the environmental impact, uncontrollederosion can have a significant financial impact on aconstruction project. It cost money and time to repairgullies, replace vegetation, clean sediment-clogged stormdrains, replace poorly installed best managementpractices (BMPs) and mitigate damage to other people’sproperty or to natural resources.History of Storm Water RegulationsTo address storm water runoff, Congress directed the U.S.Environmental Protection Agency (EPA) to develop afederal program to regulate certain high priority stormwater discharges. One such high priority source ofpollutant loading is construction activity. EPA requirespermits for storm water discharges from “large constructionactivities” as defined at 40 CFR 122.26(b)(14)(x)including clearing, grading, and excavating activities thatresult in the disturbance of equal to or greater than five(5) acres of total land area but is part of a larger commonplan of development or sale that will ultimately disturbequal to or greater than five acres. Also, effective July 1,2003 EPA now requires permits for storm waterdischarges from “small construction activities” as definedat 40 CFR 122.26(b)(15) including clearing, grading, andexcavating activities that result in the disturbance ofequal to or greater than one (1) acre and less than five (5)acres or will disturb less than one (1) acre of total landarea but is part of a larger common plan of developmentor sale that will ultimately disturb equal to or greater thanone (1) acre or less than five (5) acres.How do you determine if you need a storm waterdischarge permit for your construction activity? First,examine the planned activity. If you answer “yes” to allof the following questions, you will need a storm waterpermit for your construction activity.• Is the total site one (1) acre or more?• Is the total planned disturbance one (1) acre or more?• Is the storm water conveyed through a pipe, ditch, orswale?• Is the storm water discharged to waters of the UnitedStates (river, pond, brook, stream [perennial or intermitent],or wetland) or to a Municipal Separate StormSewer (storm drain)?In short, if a construction activity (clearing, grading, orexcavation) disturbs one (1) acre or more and has a pointsource discharge of storm water to waters of the UnitedStates, it needs a storm water discharge permit.Other PermitsDon’t confuse the EPA storm water discharge permit withother federal, state, or local programs or permits. Youwill still need a permit from EPA, or a delegated state, fora storm water discharge even if you have a valid CleanWater Act (CARS) SSE permit from the U.S. Army Corpsof Engineers. You may also need approval from state orlocal agencies (conservation commissions, soil anderosion control agencies (conservation commissions, soiland erosion control agencies or districts) to discharge to,or perform construction activities near, a watercourse,wetland, floodplain, or a Municipal Storm Sewer (stormdrain).In Boston, authorization from the Boston Water andSewer Commission is required for construction of a newor reactivated service connection to the water, sewer ordrainage system. The BWSC also requires a DrainageDischarge Permit for the discharge of construction sitedewatering to the Commission’s sewer or storm drainsystem.If you need a permit, the simplest thing to do is seekcoverage under the existing general permit for stormwater discharges from construction activities. ForMassachusetts, it can be found in the July 1, 2003 FederalRegister (68 FR 39087) and August 4, 2003 FederalRegister (68 FR 45817). A general permit means “Whatyou see is what you get.” To get coverage under thegeneral permit, all you have to do is:• Determine if you are eligible.• Make sure you understand and are willing to complywith the conditions of the general permit.• Develop a storm water pollution prevention plan priorto submitting the Notice of Intent to EPA.(Retain the pollution prevention plan on site and submita copy to BWSC. You don’t have to submit it to EPA.)• Submit a Notice of Intent to EPA with a copy sent toBWSC at least 2 days prior to the intended constructionactivity (clearing, grading, or grubbing).Compliance with the general permit means that you havea pollution prevention plan which addresses all the permitrequirements, that you maintain the plan on site, log allinspections and results, and update the plan as necessary.When you have achieved final stabilization at the site,submit a Notice of Termination for the constructionactivity. The final product should be reviewed todetermine if a post-consumption permit is required.Who Should Apply for a Permit?The owner, developed, or general contractor can apply forthe permit. All parties with day-to-day responsibility forsite operations should submit a Notice of Intent asco-permittees following the initial permit application.●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●Site Evaluation and Design Development□ Collect Site Information.□ Develop site plan design.□ Provide a narrative description of the constructionacitivity.□ Prepare a pollution prevention plan site map.Assessment□ Measure the site area.□ Determine the drainage area,□ Calculate the runoff coefficient.Control Selection/Plan Design□ Measure the site area.□ Determine the drainage area.Terminating Coverage□ Review and incorporate state and/or local requirements.□ Select erosion and sediment controls.□ Select storm water management controls.□ Indicate location of controls on the site map.□ Prepare an inspection and maintenance plan,□ Coordinate controls with construction activities.□ Prepare sequence of major activities.Certification and Notification□ Have an authorized representative (president, vicepresident, general partner) certify the plan.□ Submit Notice of Intent to EPA with a copy sent toBWSC - EPA Form 3510-9 included in Appendix E ofthe “NPDES General Permit for Storm WaterDischarges from Construction Activities” and can befound at: http://www.epa.gov/npdes/stormwater/cgp□ Keep the plan on site and submit a copy to BWSC.Construction/Implementation□ Implement controls.□ Inspect and maintain controls.□ Update/change the plan as necessary.□ Report releases of reportable quantities.Final Stabilization/Termination□ Complete final stabilization (see Tips for Compliance).□ Submit Notice of Termination-EPA From 3510-13 includedin Appendix F of the “NPDES General Permit for StormWater Discharges from Construction Activities” and can befound at: http://www.epa.gov/npdes/stormwater/cgp□ Retain records 3 years after final stabilization.

4.0 REPRESENTATIVE AND RECEIVING WATERMONITORING, AND BMP DEMONSTRATIONPROGRAMS4.1 PREVIOUSLY COMPLETED MONITORING PROGRAMSUnder the permit, the Commission was required to monitor stormwater quality in areasrepresentative of different land uses and receiving water quality during wet weather. TheCommission was also required to implement a demonstration program designed toevaluate the effectiveness of a non-structural stormwater Best Management Practice.The Commission completed all of the required monitoring and the demonstrationprogram within the first five years of the permit. In 2004, because there were fundsremaining in the monitoring program contract, the Commission extended the contractduration, and an additional round of receiving water monitoring was performed in 2005.In 2006, the Commission extended the monitoring program contract again, and added$10,039 to the contract, to allow for one more year of receiving water monitoring. Intotal, the Commission completed six years of receiving water monitoring.In 2007, anticipating that the Commission’s permit would soon be re-issued byEPA/DEP, the Commission sent a letter to EPA/DEP stating that it had fulfilled all of themonitoring requirements of the existing permit and there were no immediate plans tocontinue representative and receiving water monitoring. Since there was no responsefrom EPA or DEP regarding the letter, it was concluded that this was acceptable to EPAand DEP.Descriptions of the monitoring programs and the BMP Demonstration program werereported in previous Stormwater Management Reports.4.2 2010 STORMWATER MONITORING PROGRAMIn 2010, the Commission monitored stormwater discharges from representative drainageareas and receiving waters. The same three (3) representative areas and the same five (5)sample sites within three (3) receiving water bodies were sampled as in the previousmonitoring program, during three (3) storm events. The purpose of the monitoring was todetermine if there was any change in the concentration of pollutants over time, and to tryto determine pollutant sources. The stormwater monitoring program was completedtowards the end of 2010 and the final report was completed in May 2011. The ExecutiveSummary is provided below. The full report is available upon request.4 - 1

STORMWATER QUALITY EVALUATION PROGRAM 2010EXECUTIVE SUMMARYThe Boston Water and Sewer Commission (Commission) conducted a StormwaterQuality Evaluation Program in the summer and fall of 2010 during three rainfall eventsand once during dry weather to:a. assess the current concentrations of pollutants in stormwater discharged from threerepresentative drainage areas within the Boston Water and Sewer Commission’s(Commission) drainage system; andb. evaluate the impact of wet weather discharges on the water quality of three receivingwater bodies. The same representative drainage areas and receiving watersmonitored for this program were monitored by the Commission between 2000 and2006 as part of its NPDES Monitoring Program.Consistent with the Commission’s 2000 – 2006 monitoring program, the 2010 monitoringincluded the following:• Grab and composite sampling of storm drain flow during three wet weather eventsin the three representative drainage areas;• Grab sampling during or immediately after three wet weather events and onceduring dry weather at five stations within the three receiving waters.In addition, this program included grab sample collection from four surface runofflocations within the representative drainage areas during the same three wet weatherevents in an effort to isolate potential sources of specific stormwater pollutants.The following is a summary of the water quality analysis comparison between theCommission’s 2000 – 2006 and 2010 Programs:• In general, most of the concentrations of priority parameters were similar to theprevious program (Commission’s 2000 – 2006 Program). It must be noted thatthe water quality data from the Commission’s previous program was collectedduring spring or fall rain events. The 2010 data was collected during summer rainevents.• The concentrations of orthophosphate and total phosphorus from therepresentative drainage areas appeared to be generally higher than theCommission’s previous program. This could be mainly due to the scouring effectdue to significantly higher rainfall intensities during the summer rain events thatwere preceded by extremely warm and longer antecedent dry weather conditions.• The Concentrations of bacteria was higher especially from the open space area. Itmust be noted that the bacteria concentrations can vary significantly depending onthe temperature and the pet waste in the park.4 - 2

• The total zinc concentrations were lower from the three drainage areas comparedto the previous program.• Bacteria concentrations trended higher in Canterbury Brook. Based on the pairedsampling (upstream and downstream locations of Commission’s stormdrainoutfalls) it appeared that sources other than the Commission’s storm drainscontribute to the contamination in the brook.• Total phosphorus concentrations trended higher in Canterbury Brook andChandler Pond. The higher phosphorus concentrations in Chandler Pond could beattributed to the use of fertilizers on a golf course which is located upstream to astorm drain outfall that discharges to Chandler Pond.The following were the major findings and conclusions of the Program:• Bacterial levels in stormwater exceeded applicable water quality standards,particularly those based on fecal coliform concentration, even in areas known tohave no illegal sanitary connections. Levels measured in the Commission’sNPDES monitoring programs are very comparable to those reported in theNational Stormwater Quality Database (NSQD). Ambient temperature is clearlya factor impacting bacterial concentrations but due to the characteristically highdegree of variability in bacterial data (COV > 4) it is difficult to assess othertrends. It is clear that these bacterial parameters are not reliable indicators ofsewage contamination.• Levels of copper and zinc in runoff from the Boston area exceeded applicablewater quality criteria, particularly in dissolved form. The fact that the metalsoccur primarily in dissolved form suggests that conventional BMPs aimed atsolids control will be ineffective at addressing metals toxicity. Data from thisarea indicate higher metals concentrations and higher proportions of dissolvedmetal in runoff than are reported in the national database; however that trend maynot persist as the NSQD database continues to be populated.• Drainage areas with more pavement and associated automobile traffic (e.g. thecommercial, high-density residential and mixed use areas) generally had higherlevels of solids, heavy metals, oil & grease, and/or TPH. It is not clear why themixed use area had significantly higher levels of O&G and TPH than most areas,yet had lower levels of heavy metals, which would also be associated withautomobile traffic.• Bacterial concentrations also exceeded water quality criteria in the receivingwaters during wet weather, particularly in the two brook locations. While dryweather exceedances were also relatively frequent, the concentrations weregenerally lower.• Through the use of paired sampling to isolate storm drain discharges and dryweather sampling to assess “background” conditions, it was clearly demonstratedthat sources other than the Commission’s storm drains are the primary cause of4 - 3

metals and bacterial pollution in the brooks. Chandler Pond does not have manyother sources of pollution and is generally cleaner than the brooks.• There was no indication that stormwater has a significant impact on any of theother pollutants monitored in the receiving waters.Overall, the runoff data generated by this program were similar to the NSQD databaseand previous monitoring efforts and do not provide any new insight into sources ofstormwater pollution and possible control measures. While some land use trendswere noted, e.g. associating certain pollutants with automobile traffic, they providerelatively little value to the Commission’s stormwater management planning sincethese are not factors that are within its control. It is anticipated that there is little to begained by additional stormwater and receiving water monitoring in the Commission’sservice area, and that the expense of continuing the program is not justified. Thegoals of the Stormwater Management Plan will be better served by focusing theCommission’s resources on continued elimination of sewage contamination sourcesto the storm drainage system and assessing structural and management controls thatthe Commission has the capacity/authority to implement.4 - 4

5.0 PROGRAM MODIFICATIONSNumerous modifications were made to the Commission’s stormwater programs over theyears since the Permit was first issued. These modifications were described in previousannual Stormwater Management Reports and are summarized below. This section alsodescribes any additional changes now being proposed.5.1 STORMWATER MANAGEMENT PROGRAMIt is the position of the Commission that its current Stormwater Management Plan andpractices are effective in reducing pollutants to the maximum extent practicable. Nomodifications were proposed in 2011. The Commission awarded a three (3) yearWastewater and Stormwater Facilities Plan Study in 2011. The study will include areview of the Commission’s current Stormwater Management Plan, as well as applicableBest Management Practices. The Commission also awarded a contract to update andaugment its sewer and stormwater model which will provide for projecting andcalculating annual estimated pollutant loads.5.2 OUTFALL SCREENINGa. Dry Weather Outfall Screening of Storm Drain OutfallsDuring the 1999-2004 permit term, the Commission completed screening of its majoroutfalls in accordance with the permit requirements. The results of the 1999-2004 fieldscreening were presented in previous annual reports.The Commission completed dry weather screening of all of its outfalls (major and nonmajor)towards the end of 2010, and the data was compiled in 2011. The screeningprogram and the results are described in Section 2.1. Dry weather screening of theCommission’s outfalls will be performed again in 2012.b. Wet Weather Outfall Screening of Storm Drain OutfallsThe Commission performed wet weather screening of 24 outfalls in 2000, 15 of whichwere 36-inches in diameter or larger. No odor was detected in any of the outfallsscreened. Clarity of the flow was cloudy or opaque in 17 cases. These observations were5 - 1

fairly typical for stormwater discharges. Evidence of an illegal connection was observedduring wet weather screening at one outfall. However, the evidence observed (whitechalky marks on the outfall walls) would have been equally visible during a dry weatherinspection.Since little useful information was being gained by the wet weather screening of theoutfalls the Commission reported in its 2001 Stormwater Management Report that itwould discontinue wet weather screening of the major outfalls. In a memorandum faxedby EPA to the Commission on April 29, 2003, EPA stated that the proposed eliminationof the wet weather outfall screening was approved. DEP also sent a letter to theCommission dated May 13, 2003, stating that elimination of the wet weather outfallscreening was “reasonable and appropriate”.Wet weather screening of the Commission’s storm drain outfalls is planned for 2012.5.3 ILLEGAL CONNECTION INVESTIGATIONS AND REMEDIATIONThe Commission’s Illegal Connection Investigation Programs are currently expected tocontinue as described in Section 2. In 2012, the Commission will reevaluate its prioritiesfor drainage area investigations, based on the more recent outfalls screening data.The Commission will continue to pursue correction of outstanding illegal connections,giving priority to the illegal connections that have been outstanding for the longest time.5.4 STORMWATER MONITORINGThe Commission completed the representative and receiving water monitoring requiredunder the permit, as described in Section 4. In 2007, anticipating that the Commission’spermit would soon be re-issued by EPA/DEP, the Commission sent a letter to EPA/DEPstating that it had fulfilled all of the monitoring requirements of the existing permit, andthere were no immediate plans to continue representative and receiving water monitoring.Since there was no response from EPA or DEP regarding the letter, it was concluded thatthis was acceptable to EPA and DEP.In 2010, the Commission monitored stormwater discharges from the same three drainageareas and receiving waters monitored between 1999 and 2004. The stormwatermonitoring program was completed towards the end of 2010 and the final report wascompleted in May 2011. The Executive Summary of the report is provided in Section 4of this report and the full report is provided on the CD with this report.As stated above, the Commission awarded a contract to update and augment its sewer andstormwater model. The scope of work includes representative stormwater sampling inthe Fall 2011 and Spring 2012. The data collected will be used to verify and calibrate themodel.5 - 2

5.5 BMP DEMONSTRATION PROGRAMSThe Pet Waste Management and Catch Basin Effectiveness Evaluation BMP programswere concluded in 2002. No additional demonstration programs are planned at this time;however, review and analysis of existing and alternative BMPs will be included in theabove-mentioned three (3) year Wastewater and Stormwater Facilities Plan Study.5.6 STRUCTURAL CONTROLSA discussion of structural controls and updates as to Commission activities can be foundin Section 9 of this report.5 - 3

6.0 FINANCING STORMWATER MANAGEMENTThe Commission’s Enabling Act empowers the Commission to independently set ratesand charges for the services that it provides. The Commission is required to establishfees, rates, rents, assessments, and other charges at a level and amount at least sufficientto pay the principal, premium, and interest on bonds issued by the Commission; tomaintain its reserve funds as stipulated by its General Bond Resolution; to provide fundsfor paying the cost of all necessary repairs, replacements, and renewals of the water andsewer systems; and to pay any and all other amounts which the Commission, by law orby contract, is obligated to pay.In determining costs for the Commission’s Stormwater Management Program andNPDES Stormwater Permit compliance, it is difficult to separate costs that arespecifically attributed to the stormwater system, as opposed to those incurred for themanagement of the Commission’s operations as a whole. In many cases staff, equipmentand vehicles are shared among divisions and departments, and activities that accomplishone particular goal may also serve to satisfy the requirements of the Stormwater Permit.The Commission has sufficient funds and equipment to carry out the stormwatermanagement programs and activities required under the NPDES Stormwater Permit. Amajor portion of the Commission’s Stormwater Management Program and NPDESStormwater Permit compliance activities are achieved using existing in-house staff andresources. Staffing and equipment are budgeted under the Commission’s CurrentExpense Budget (CEB), which is updated annually. Larger sewer and drain projects arefunded under the Commission’s Capital Improvement Program Plan (CIP). TheCommission’s three-year CIP is updated annually.6.1 CURRENT EXPENSE BUDGETThe 2011 Current Expense Budget provided for $296 million in revenues and expenses.This amount represented a 1.3 percent increase as compared to the 2010 budget. Of thetotal budgeted for 2011, $58.2 million was for direct expenses. The remaining $237.8million was budgeted for the assessment by the Massachusetts Water ResourcesAuthority ($180.6 million), Debt Service ($43.8 million), Capital Improvements ($12.7million), Contractual Funding Obligations ($0.5 million), and the Safe Drinking WaterAct Assessment ($0.2 million).In general, stormwater programs and activities are managed in-house by theCommission’s Operations and Engineering Divisions. Approximately $23.9 million or6 - 1

41 percent of the Commission’s 2011 direct expense budget was for the OperationsDivision. Of the Operations Division’s direct expense budget, about $13.8 million wasfor sewer and storm drain related operations.Approximately $7.7 million or 13 percent of the Commission’s 2011 direct expensebudget was for the Engineering Division. About $4.5 million of the EngineeringDivision’s direct expense budget was for sewer and drain related work. Put another way,about $18.3 million was budgeted for Operations and Engineering Division’s directexpenses relating to sewer and drain work. Thus sewer and drain related work representsabout 31 percent of the Commission’s total direct expense budget.The Current Expense Budget for 2012 had not been finalized as of the writing of thisreport. However, it is anticipated that the 2012 CEB will provide a similar level offunding for direct expenses relating to sewer and drain work.Stormwater related programs and activities funded under the Current Expense Budgetinclude:• Illegal connection investigations and corrections• Illegal connection prevention• Illegal dumping and spill response• Infiltration and inflow identification and reduction• Issuing Drainage Discharge Permits• Sewer and storm drain maintenance and general repair• Catch basin and particle separator cleaning and maintenance• Designing and installing new particle separators• Site plan review• New service inspections and dye tests• Issuing drain layers licenses• Planning, designing and constructing capital improvements• System evaluations and Master Planning• Reviewing Environmental Notification Forms and Environmental Impact Reports• Public education• Rain data collection6.2 CAPITAL EXPENDITURESThe 2011-2013 CIP included $66.6 million for sewer and drain related projects, of which$20.5 million was earmarked for 2011. The Commission’s 2012-2014 CIP plan identifies$103.6 million for sewer and drain related projects, of which $40.3 million is earmarkedfor 2012. The complete 2012-2014 CIP plan is available on the Commission’s website atwww.bwsc.org.6 - 2

These costs do not include the cost of CSO separation projects that are funded by theMWRA under the MWRA’s CSO Control Plan. However, they do include theCommission’s costs for water and sewer work relating to the MWRA’s CSO ControlPlan that is not eligible for MWRA funding.Programmatic activities covered under the 2012-2014 CIP include the following:• Installation of new and larger drains in the Longwood Medical Area to alleviateflooding during heavy rains.• Construction of a new stormwater outlet to the Muddy River to improve drainageconditions in the Longwood Medical Area.• Construction of a larger storm drain to alleviate constriction in the DorchesterBrook Sewer which currently causes backups during heavy rains.• Relocation of the regulator on the Dorchester Brook Sewer to remove storm flowfrom 185 acres of land that currently flows to the New Boston Main Interceptor.• Removal of sediment from the West Side Interceptor, East Boston Low LevelSewer, Roslindale Interceptor, Stony Brook Valley Sewer, West Roxbury andJamaica Plain Low Level Sewers and the Stony Brook Interceptor to maintainhydraulic capacities in the systems.• Rehabilitation of Outfall 010 in East Boston and related professional services.• Reconstruction of storm drain outfall 28K061 in Charlestown.• Cleaning and rehabilitation of overflow conduit 065 to the Fort Point Channel.• Sewer separation and affiliated rehabilitation work in the St. Mary’s Street areaincluded in the CSO 036 area.• Sewer separation of flows along a portion of A Street and West Second Street inSouth Boston to help reduce overflows to Fort Point Channel.• Sewer separation of flows along Massachusetts Avenue in Lower Roxbury/NorthDorchester.• Sewer separation in the areas tributary to the Reserved Channel in South Boston.• Sewer separation in the Dudley Square area• A water quality evaluation of the Fort Point Channel• Augmentation of the Commission’s stormwater model.• Preparation of a Wastewater/Drainage Facilities Plan.• Implementation of a system-wide sewer metering program.• Installation and upgrade of the Commission’s rain gauges.• Identification and elimination of illegal connections to storm drains.• Disconnection of downspout in Jamaica Plain, Dorchester, Allston-Brighton,West Roxbury, Roslindale, South Boston and Hyde Park.• Projects relating to sewer separation projects that are necessary, but are noteligible for funding by the MWRA. These include renewal and replacement ofexisting sewers and drains in the areas being separated, rehabilitation or relay ofwater mains in the areas, and associated paving costs.6 - 3

7.0 ENFORCEMENTThe Commission’s approach to enforcement is generally proactive in that it focusesprimarily on public and contractor education, and requiring proper site planning bydevelopers. Enforcement is supported by the Commission Sewer Use Regulations andthe Site Plan Requirements. Enforcement, including fines, generally involves issuance ofaction to prevent spills or contamination of the Commission’s MS4 system. TheCommission may also take enforcement action, where necessary, to remedy and correctillegal connections discussed in Section 2.The Commission’s method of enforcement varies, depending on the type and magnitudeof the violation. In most cases, the Commission prefers to work with violators orresponsible parties to ensure that the problem is quickly and effectively remedied.However, if an owner fails to take action and remedy the problem, or if the action isserious in nature, the Commission through its Planning Department, Field EngineeringDepartment and/or Office of General Counsel will issue a violation letter imposing a fine.A schedule of fines is set forth in the Commission’s Sewer Use Regulations.In 2011, Field Engineering responded to 102 reports of a potential spill, leak, or report ofillicit dumping. Table 3 – 3 in section 3.2. lists the incidences to which the Commissionresponded in 2011. Enforcement notices were issued by staff in fifteen (15) of thoseinstances. Fines were assessed in two (2) instances.7 - 1

8.0 WATER QUALITY IMPROVEMENTSThe Commission’s Stormwater Management Program is a compilation of programs,activities, and best management practices aimed at preventing the discharge of pollutantsto storm drains and receiving waters. Water quality improvements attributable to theCommission’s Management Program are difficult to quantify, since most of the measuresthe program contains are non-structural, and are aimed at controlling the introduction ofpollutants to the storm drain system at their sources, as opposed to end-of-pipe treatment.Therefore, the Commission assesses water quality improvements based on measures thatare quantifiable, such as how much wastewater is removed from the drainage systemwhen an illegal connection is eliminated, and how much sediment is removed fromstormwater runoff by structural devices.8.1 ILLEGAL CONNECTION ELIMINATIONThe Commission believes that eliminating illegal sanitary connections to storm drains isthe most cost-effective and environmentally beneficial means of improving water quality.In 2011, the Commission corrected seventy-two (72) illegal connections, therebyeliminating the discharge of an estimated 18,427 gallons per day (gpd) of wastewater tothe drainage system and receiving waters. Between 1986, when the Commission firstbegan correcting illegal connections, and the end of 2011, the Commission removed1,165 illegal connections, thereby eliminating the discharge of an estimated total of594,276 gallons of wastewater per day to the storm drainage system and receiving waters.8.2 SEWER, DRAIN, CATCH BASIN AND PARTICLE SEPARATORCLEANINGIn 2011, the Commission and its contractors removed an estimated 4,680 tons of materialfrom the Commission’s catch basins, particle separators, and drains that might haveotherwise ended up in local rivers and waterways.8.3 BMPS ON PRIVATE PROPERTYUnder the Commission’s Sewer Use Regulations and Requirements for Site Plans, thereare several provisions requiring the installation of structural best management practicesby private parties, as described below.8- 1

a. Privately Owned Retention/Infiltration DevicesOn-site retainage and infiltration of stormwater is required for new and redevelopmentprojects, whenever site conditions permit, as determined by the Commission. Projectdevelopers are required to include a feasibility assessment for on-site retention ofstormwater with the site plan submitted to the Commission for the project. On-siteretention of stormwater serves to limit peak discharge rates, recharge groundwater, andremove 80 percent of total suspended solids in the flow to the extent feasible. Thisrequirement is consistent with the Department of Environmental Protection’s StormwaterManagement Policy which establishes standards for stormwater management fordevelopment.On-site retention devices are usually owned by the owner of the property where they arelocated, and the owner is responsible for cleaning and maintenance. Owners of on-sitedevices are not required to provide data regarding solids removal rates to theCommission. However, the devices are expected to remove solids consistent with theirdesigns.In 2011, the Commission approved 208 site plans which included installation of a drywell or other type of infiltration device. The addresses of the devices approved in 2011were listed previously in Table 3 – 4. Since 1993, when the Commission first startedtracking infiltration devices installed pursuant to site plans, 1,684 private developmentprojects have included infiltration devices.b. Privately Owned Particle SeparatorsIn order to prevent oil, grease and sediments from discharging to open waterways, theCommission requires that developers install particle separators on all newly constructedstorm drains that serve outdoor paved areas of 7,500 square feet in size or greater. TheCommission ensures that particle separators on parking lots are included in the projectdesign during site plan review. The Commission may require particle separators onexisting storm drains from existing outdoor parking areas, where appropriate. Thisrequirement has been in place since 1992.Parking lot particle separators are usually owned by the owner of the property where theyare located, and the owner is responsible for their cleaning and maintenance. Owners ofon-site particle separators are not required to provide data regarding solids removal ratesto the Commission. However, the devices are expected to remove solids consistent withtheir designs.In 2011, the Commission approved 35 site plans which included installation of particleseparators. The addresses of the devices approved in 2011 were previously listed onTable 3 – 5. Since 2001, when the Commission first started tracking particle separatorsinstalled pursuant to site plans, 291 private development projects have includedinstallation of particle separators.8- 2

9.0 ASSESSMENT OF STRUCTURAL CONTROLS9.1 CATCH BASINSThe Commission relies on catch basins as the primary means for preventing the transportof sediments, debris, and other contaminants to storm drains and receiving waters. TheCommission’s Stormwater Monitoring Program included a demonstration project toevaluate the effectiveness of catch basins in capturing solids. The demonstration projectstarted in 2001 and concluded in 2002. The results of the demonstration project(described in previous annual reports) indicated that a clean and well-maintained catchbasin will remove between 10 to 33 percent of the total solids from stormwater flowthrough the basin. The data also suggested that a catch basin’s ability to remove solidsdiminishes as the sump of the catch basin approaches half full. These findings areconsistent with the conclusions of other similar studies reported in the literature.The Commission continued to measure the depth of sediment in the catch basin sumps ona quarterly basis through the beginning of 2004. The results showed that sediment depthsin the two catch basins monitored continued to increase between April 2002 and May2003, but began to level off and even decline, as the basins approached 50 percent full.This finding appears to confirm that the catch basin had achieved their maximumeffectiveness.Under the Commission’s Catch Basin Inspection and Cleaning Program the sedimentdepths in one hundred catch basins were monitored between January 2002 and April2003, to determine the factors that effect how quickly catch basins become full.Variables considered in selecting the catch basins to be monitored included slope, landuse and the size of the tributary area, the type of road (highly traveled road vs. backroad), and tree cover. The selected catch basins were inspected four times each on aquarterly basis and the depth of sediment measured.No statistically significant correlation between land use and accumulation rates wasobserved. Similarly, no correlation was observed based on slope, drainage area, orneighborhood characteristics. Some correlation with tree cover was observed, with thecatch basins located in areas of denser tree coverage demonstrating as much as 50 percenthigher accumulation rates as compared to basins with little or no tree cover. The dataalso exhibited a seasonal correlation, with the winter months demonstrating the highestaccumulation rates.9 - 1

Based on the findings of the Commission’s catch basin effectiveness analyses, theCommission’s catch basins should continue to effectively remove sediments fromstormwater runoff, provided that sediment levels are not allowed to exceed one-half ofthe capacity of each catch basin’s sump.Under the Commission’s current citywide catch basin cleaning contract contract forcescurrently clean any catch basin containing twenty (20) inches or more of sediment.Contractors typically complete two passes through the city each year cleaning basins asdirected by the Commission. This catch basin cleaning schedule should ensure that theCommission’s catch basins continue to effectively remove sediments from stormwaterrunoff.9.2 PARTICLE SEPARATORSThe Commission currently owns 15 particle separators. All fifteen (15) particleseparators were cleaned in 2011. Information regarding the various particle separators,including their locations, receiving waters, and amount of material removed at eachcleaning since 2001 is summarized in Table 9 – 1.The cleaning data provided over the last several years demonstrated that there aresignificant differences in the amount of material removed from each separator from yearto year, although the reasons were unclear. There are many variables which could affectthe amount of material retained in a separator, including, frequency and intensity of rainand snow storms, land use, topography and size of the area tributary to the particleseparator, season during which the separator was cleaned and design factors.The Commission typically uses a vactor truck with a vacuum hose to clean its particleseparators, and this equipment is not conducive to accurate quantification of materialremoved. The amount of material removed is estimated by the operator and notmeasured. Each operator may estimate the amount of material removed differently thanothers. For these reasons it is difficult to establish which factor(s) determine how well aparticle separator removes solids, or why one particle separator appears to capture moresediment than another.Also unclear, was whether the amount of material removed at each cleaning representedthe cumulative sediment load captured by the device over the year, or that it was only theamount of material that happens to be in the separator at the time of cleaning. Toexamine this issue more closely, in 2010, the Commission inspected and cleaned two ofits particle separators (Fenwood Road and Walter Street) approximately once a monthbetween March and October 2010, to determine if there was any difference in the amountof material removed. The results of the Particle Separator Assesment 2010 are includedin Table 9-1.9 - 2

Table 9 - 12011 Particle Separator AssessmentLocationNeighborhoodTypeMap #Outfall #Receiving Water2001-Amt ofMaterial Removed(cubic yards)2002-Amt ofMaterial Removed(cubic yards)2003-Amt ofMaterial Removed(cubic yards)2004-MaterialRemoved (cubicyards)Arnold Aroboretum Jamaica Plain Vortex 13F 13F011 Bussy Brook N/A N/A New in 2003 Not cleaned Not cleaned 1.00 2.50 0.25 1.00 3.00 1.500 7.750Centre Lane WROX Vortex 8C 8C025,8C026 Wetlands Cleaning not needed 0.13 0.00 Not cleaned 0.25 0.25 0.75 0.25 0.10 0.25 0.050 1.975Centre Street WROX Vortex 6C 6C110 Wetlands 0.25 0.13 0.00 Not cleaned 0.50 0.50 0.50 0.00 0.50 0.00 0.250 2.375Coleridge Street East Boston Box 28O 28O025 Boston Harbor Constructed in 2001 Not cleaned 0.50 Not cleaned 0.25 0.25 0.50 2.00 0.25 2.50 0.005 6.250Coniston Road Roslindale Box 12E 13I023 Stony Brook Conduit Cleaning not neededCleaningnotneeded 0.00 Not cleaned 0.25 0.50 0.00 0.00 0.00 0.00 0.000 0.750Denny Street Dorchester Vortex 15L 15L089 (CSO) Malibu Beach Cleaning not needed 0.13 0.00 Not cleaned 0.25 0.75 1.00 0.00 1.00 0.12 0.150 3.248Ericsson Street Dorchester Box 12M 12M091 Neponset River Cleaning not needed 0.13 0.50 Not recorded 0.25 0.25 0.25 0.00 0.25 0.15 0.200 1.778Fenwood Road Roxbury Box 20G 20G161 Muddy River Cleaning not needed 0.25 0.33 Not recorded 2.00 4.00 0.50 0.25 2.25 0.25 0.02 1.50 0.15 0.15 0.12 0.250 12.020Lawley Street Dorchester Box 12L 12L092 Pine Neck Creek Cleaning not needed 0.25 0.25 Not cleaned 0.25 0.25 0.15 0.03 0.25 0.50 0.010 1.925Neponset Avenue Dorchester Box 11M 11M093 Neponset River 2.00 0.50 0.25 Not cleaned 2.00 2.75 1.50 0.50 1.50 2.00 0.500 13.000Norton Street Hyde Park Box 3E 3E185 Open Channel Cleaning not needed 0.25 0.25 Not cleaned 0.25 0.50 0.50 0.03 0.13 0.25 0.001 2.155Perkins Street Jamaica Plain Vortex 17F 17F012 Jamaica Pond Cleaning not needed 0.25 4.00 Not recorded 0.25 0.25 1.50 0.00 1.50 2.00 0.000 9.750Waldemar Avenue East Boston Box 30P 30P107 Belle Isle Inlet Cleaning not needed 0.25 0.50 Not cleaned 1.000 or notrecorded 0.25 0.25 0.10 0.12 0.001 2.470Waldemar Avenue East Boston Box 31O 31O004 Belle Isle Inlet Cleaning not needed 0.25 0.50 Not cleaned 1.000 or notrecorded 0.50 0.25 0.75 1.00 0.005 4.250Walter Street Roslindale Vortex 12F 12E418 Wetlands Cleaning not needed 0.25 0.00 Not cleaned 0.25 Not cleaned 0.50 0.01 0.25 0.15 0.25 0.01 0.10 0.01 0.10 0.001 1.876TOTALS 2.25 2.75 7.08 --- 8.75 11.25 10.90 3.81 9.83 11.89 0.40 0.25 0.03 1.50 0.25 0.16 0.10 0.12 2.923 71.3202005-MaterialRemoved (cubicyards)2006-MaterialRemoved (cubicyards)2007-MaterialRemoved (cubicyards)2008-MaterialRemoved (cubicyards)2009-MaterialRemoved (cubicyards)2010 MaterialRemoved (cubicyards) Misc. dates3/10/20104/13/20105/25/20106/13/20107/20/20109/16/201010/21/201010/29/20102011 Various DatesTOTAL MATERIALREMOVED (cubicyards)9 - 3