missouri risk-based corrective action (mrbca) process for petroleum ...

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workgroup manner, all parties recognize that it is subject to additional revision based onexperience. Therefore, while it is to be used generally as guidance, it is not yet aregulation of the State of Missouri. It is anticipated that this document will continue toevolve based on experience. A separate stakeholder group has been formed to monitorboth the positive and negative experiences associated with efforts to implement thisguidance in the context of actual Missouri sites. For further information on this GuidanceDocument and its application, contact MDNR.MRBCA Guidance Document iiiFebruary 24, 2004Final Draft
ABBREVIATIONSAPI American Petroleum InstituteAST Aboveground Storage TankASTM American Society for Testing and MaterialsAUL Activity Use and LimitationsBTEX Benzene, Toluene, Ethylbenzene, and Xylenes (total)bgs Below Ground Surfacecfs Cubic Feet per SecondCAP Corrective Action PlanCOC Chemicals of ConcernCERCLA Comprehensive Environmental Response, Compensation, and LiabilityActCFR Code of Federal RegulationsCSR Code of State RegulationsDAF Dilution Attenuation FactorDOT Department of TransportationDTL Default Target LevelEDB Ethylene DibromideEDC Ethylene DichlorideEER Environmental Emergency ResponseEM Exposure ModelEPA Environmental Protection AgencyftFeetGSRAD Geological Survey and Resource Assessment DivisionHWP Hazardous Waste ProgramIELCR Individual Excess Lifetime Cancer RiskIRIS Integrated Risk Information SystemLNAPL Light Non-Aqueous Phase LiquidLEL Lower Explosive LimitMCL Maximum Contaminant LevelMDNRMissouri Department of Natural ResourcesMEGA Missouri Environmental Geology AtlasMLWL Mean Low Water LevelMNA Monitored Natural AttenuationMRBCA Missouri’s Risk-Based Corrective ActionMSDS Material Safety Data SheetMTBE Methyl tert-Butyl EtherNAPL Non-Aqueous Phase LiquidNELAP National Environmental Laboratory Accreditation ProgramNFA No Further ActionOAC Outreach and Assistance CenterOVM Organic Vapor MonitorPAH Polynuclear Aromatic HydrocarbonsPID Photoionization DetectorMRBCA Guidance Document ivFebruary 24, 2004Final Draft
Page 1 and 2: Missouri Department of Natural Reso
Page 3: FOREWORDThis guidance document desc
Page 7 and 8: TABLE OF CONTENTSCOVER PAGEACKNOWLE
Page 9 and 10: 5.0 SITE CHARACTERIZATION AND OTHER
Page 11 and 12: 7.0 TIER 1 RISK ASSESSMENT 7-17.1 S
Page 13 and 14: 13.0 REFERENCES 13-1MRBCA Guidance
Page 15 and 16: Figure 4-3(b) Tank Excavation Sampl
Page 17 and 18: IMPORTANT CONTACT INFORMATIONAmeric
Page 19 and 20: MRBCA Guidance Document xviiiFebrua
Page 21 and 22: This document does not in any way r
Page 23 and 24: investigation resulting in confirma
Page 25 and 26: Details of Tier 1 risk assessment a
Page 27 and 28: Tier 1 RBTLs are generic target lev
Page 29 and 30: Site CharacterizationRegulatory Pol
Page 31 and 32: ANoConcentrationsExceed Tier 1Level
Page 33 and 34: Table 2-1Comparison of Risk Assessm
Page 35 and 36: 3.0SITE DISCOVERY AND INITIAL RESPO
Page 37 and 38: 3.4 INVESTIGATION OF CONFIRMED RELE
Page 39 and 40: Table 3-1Default Target LevelsChemi
Page 41 and 42: 4.3 CLOSURE OF TANKS BY EXCAVATION
Page 43 and 44: 4.4.2.2 Soil Sampling Requirements
Page 45 and 46: The samples must be collected from
Page 47 and 48: Sampling Background Conditions: If
Page 49 and 50: A groundwater investigation is requ
Page 51 and 52: 4.5.1 On-site Storage of Excavated
Page 53 and 54: 4.5.3 Disposal of Petroleum Contami
Page 55 and 56:
Exhibit 4-8Toxicity Characteristic
Page 57 and 58:
To properly characterize deferred m
Page 59 and 60:
Figure 4-1(a). Tank Floor Sampling
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Figure 4-2(a). Tank Excavation Samp
Page 63 and 64:
Figure 4-3(a). Tank Excavation Samp
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Figure 4-4(a). Sampling for a Singl
Page 67 and 68:
Figure 4-5(a). In-Place Closure of
Page 69 and 70:
Figure 4-6(a). Wall Sampling After
Page 71 and 72:
5.0SITE CHARACTERIZATION AND OTHER
Page 73 and 74:
• Type of product released, and
Page 75 and 76:
If data collected in the past does
Page 77 and 78:
• Determine the types of material
Page 79 and 80:
The land use map need not be drawn
Page 81 and 82:
In the event that circumstances at
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Multiple samples from across the si
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predominant flow direction, estimat
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esidential receptors. For the subsu
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Step 2: From the point of release i
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All boreholes and probes greater th
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• Adequate QA/QC procedures must
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Type ofProductReleasedKnown?NoAYesG
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NFigure 5-2. An Example ofa Land Us
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Figure 5-3(b)ST #SOIL BORING LOGBOR
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Figure 5-4(b)ST #MONITORING WELL IN
Page 103 and 104:
Table 5-1 (Page 2 of 3)Chemicals of
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Table 5-2Weight Percents for COCs i
Page 107 and 108:
PAH’SCompound Method Water PQL So
Page 109 and 110:
MRBCA LABORATORY REQUIREMENTSI. REQ
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for calibration or quantitation. Th
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7. Retention time windows are defin
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ATTACHMENT AEcological Risk Assessm
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7.b.) Is there a hydrogeological co
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6.0GENERAL CONSIDERATIONS FOR RISK
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• Local Zoning Ordinance(s),• C
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6.1.3 Human Exposure Pathways and R
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6.1.3.4 Pathways for GroundwaterPot
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Due to the limited number of COCs a
Page 129 and 130:
6.3 EVALUATION OF GROUNDWATER USEWi
Page 131 and 132:
ased on consideration of the follow
Page 133 and 134:
6.4.1 Protection of StreamsProtecti
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criteria based on these routes of e
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• Ecotox Thresholds (ETs) as pres
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must be used. The specific equation
Page 141 and 142:
Pathway complete?NoYesTier 1 evalua
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MCL Exists?YesUse MCLNoChemicalVola
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Identify Stream Classification10 CS
Page 147 and 148:
Table 6-2Calculation of Representat
Page 149:
•••••
Page 154 and 155:
Tables detailing the March 2005 soi
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Depth to Subsurface Soil Sources (d
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8.1.2 Groundwater ParametersDepth t
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Infiltration Rate (I) (Tier 1 defau
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Impacted AreayLeachatexzYW gaU gwZC
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• An explanation of data gaps tha
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Condition 4: Absence of ecological
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• Active remedial actions to redu
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10.4 NO FURTHER ACTION PROCEDUREWhe
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C. A Deed Notice is an informationa
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(5) a state regulation prohibiting
Page 176 and 177:
12.2 SITE DISCOVERY12.2.1 Release/S
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12.2.4 System Test Report (narrativ
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• Intent of report: To provide re
Page 182 and 183:
12.3.4 Soil Vapor Measurement Work
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- A discussion of ecological exposu
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12.4.3 Tier 3 Work PlanThe content
Page 188 and 189:
o A description of the risk managem
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• Intent of work plan: The AUL Wo
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(investigative, remedial, or monito
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- A discussion of the composition o
Page 196 and 197:
- Form No. Tier 1-7: Analytical Dat
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Total Petroleum Hydrocarbon Criteri
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APPENDIX AThis appendix has been in
Page 202 and 203:
The procedure used to calculate Tie
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For a Tier 2 risk assessment, a com
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Soil Vapor Concentration: The soil
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INDOOR INHALATION OF VAPORS(CHILD A
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INGESTION AND INHALATION OF GROUNDW
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DERMAL CONTACT WITH CHEMICALS IN SU
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INHALATION OF VAPORS AND PARTICULAT
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Where:RBTL ss = Risk-based target l
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Where:RBTL ai-adj = Age-adjusted ri
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Where:RBTL ao-adj = Age-adjusted ri
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Where:RBTL w-adj = Age-adjusted ris
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Where:RBTL dcw-adj = Age-adjusted r
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Where:RBTL dcss-adj = Age-adjusted
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Where:RBTL ingss-adj = Risk-based t
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Where:RBTL ss-adj = Age-adjusted ri
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SUBSURFACE SOIL VAPOR CONCENTRATION
Page 234 and 235:
GROUNDWATER CONCENTRATIONS PROTECTI
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VOLATILIZATION FACTORS(PARTICULAR E
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VOLATILIZATION FACTORS(SUBSURFACE S
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EFFECTIVE DIFFUSION COEFFICIENTSeff
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LEACHING FACTOR FROM SUBSURFACE SOI
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SOIL VAPOR CONCENTRATION AT WHICH V
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ALLOWABLE SOIL AND GROUNDWATER CONC
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STREAM PROTECTION: ALLOWABLE SOIL A
Page 250 and 251:
Table B-2Physical and Chemical Prop
Page 252 and 253:
Table B-3 (Page 2 of 2)Exposure Fac
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Table B-4 (Page 2 of 2)Fate and Tra
Page 256 and 257:
The procedure used to quantitativel
Page 258 and 259:
• Tier 2, Alternative 2: The soil
Page 260 and 261:
The entity performing the work shal
Page 262 and 263:
Pathway complete?NoYesTier 1 evalua
Page 264 and 265:
APPENDIX DA METHOD FOR DETERMINING
Page 266 and 267:
epresentative value for the hydraul
Page 268 and 269:
15Hydraulic Conductivity, gpd/ft 21
Page 270 and 271:
APPENDIX EESTIMATION OF REPRESENTAT
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To calculate the representative con
Page 274 and 275:
The MRBCA process requires the eval
Page 276 and 277:
concentration of these samples may
Page 278 and 279:
APPENDIX FCONSIDERATION OF TOTAL PE
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• All soil and groundwater sample
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with Tier 1 and Tier 2 target level
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APPENDIX GMRBCA REPORT FORMSForm No
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CLOSURE NOTICE FOR PETROLEUM RELEAS
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UNDERGROUND STORAGE TANK CLOSURE NO
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CHOOSE THE AREA BASED ON YOUR COUNT
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Risk-Based CorrectiveAction For Pet
Page 294 and 295:
UNDERGROUND STORAGE TANK CLOSURE RE
Page 296 and 297:
RESULTS OF SOIL ANALYSISFORM CR-2SI
Page 298 and 299:
TIER 1 AND TIER 2 RISK ASSESSMENT R
Page 300 and 301:
MAINMRBCACOVER PAGETABLE OF CONTENT
Page 302 and 303:
TABLE OF CONTENTSSITE NO.: SUBMITTA
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FACILITY INFORMATION Tier 1-1SITE N
Page 306 and 307:
RELEASE CHARACTERIZATION Tier 1-3SI
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SITE HYDROGEOLOGY Tier 1-5SITE NO.:
Page 310 and 311:
ANALYTICAL DATA SUMMARY FOR SURFICI
Page 312 and 313:
ANALYTICAL DATA SUMMARY FOR SUBSURF
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ANALYTICAL DATA SUMMARY FOR GROUNDW
Page 316 and 317:
ANALYTICAL DATA SUMMARY FOR GROUNDW
Page 318 and 319:
SOIL GEOTECHNICAL PARAMETERS* Tier
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EXPOSURE MODEL - OFF-SITE RESIDENT
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EXPOSURE MODEL - OFF-SITE NON-RESID
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EXPOSURE MODEL - OFF-SITE CONSTRUCT
Page 326 and 327:
COMPARISON OF REPRESENTATIVE CONCEN
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Risk-Based CorrectiveAction For Pet
Page 342 and 343:
TIER 2 FATE AND TRANSPORT PARAMETER
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356 and 357:
TIER 2 APPLICABLE TARGET LEVELS FOR
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