Fountaingrove Environmental Impact Report - City of Santa Rosa ...

4.0 MITIGATION MONITORING AND REPORTING PROGRAM
TABLE 4-1
Mitigation Monitoring and Reporting Program
Documentation
Additional Permit
Enforcement
Implementation
Schedule
Impacts Mitigation Measures Responsible
Party
Storm Water Mitigation Plan.
99-08-DWQ).
construction
activities.
Community
Development
Written Certification of BMP installation.
Santa Rosa Santa Rosa
Area Standard Urban
Stormwater Mitigation
Plan (SUSMP).
Construction
Contractor
As described above, compliance with the NPDES General
Construction Permit, Santa Rosa’s municipal stormwater
NPDES permit, the grading ordinance, the Santa Rosa
Area SUSMP, and the Storm Water Mitigation Plan will
minimize any water quality impacts. Informational signage
will be added along Project pathways located near the
creek that describe the sensitivity of the buffer area and
establish appropriate restrictions.
During grading and construction activities, there would be the potential for surface water
runoff to carry sediment and other pollutants into the stormwater system and Piner Creek,
thereby potentially degrading water quality. As noted above, Piner Creek is a tributary to
Santa Rosa Creek, which is listed as a 303(d) impaired waterway for sediments. Construction
activities are required to comply with the National Pollutant Discharge Elimination System
(NPDES) General Construction Permit, which requires preparation of a Stormwater Pollution
Prevention Plan (SWPPP) outlining BMPs to be used during construction. The SWPPP would
include BMPs for erosion control, sediment control, tracking control, wind erosion, and
nonstormwater discharges.
In addition, the Project would result in disturbance of more than 1 acre of soil; therefore, the
Project will require coverage under the Statewide General Construction Permit. The General
Construction Permit requires permittees to implement specific sampling and analytical
procedures to determine whether implemented BMPs are preventing sediment-impaired
waters from further impairment by direct discharge of sediments in stormwater. As such, the
Project would be required to implement a sampling and analysis program to monitor
stormwater discharges during construction. With incorporation of the General Construction
Permit requirements, the Project would not result in a significant short-term water quality
impact.
After construction is complete and the Project is in operation, stormwater could transport
contaminants—such as accumulated particulate matter, residuals from automobile use, and
organic matter from access roadways, landscaped areas, and other exposed surfaces—into
the storm drain system.
Because the Project would increase impervious surfaces by more than 1 acre and result in
development adjacent to a natural waterway, it would be required to follow the requirements
outlined in the SUSMP. As required by the SUSMP, the Project would include preparation of
a Storm Water Mitigation Plan to mitigate post-construction water quality impacts. The new
storm drain system would incorporate a hydrodynamic stormwater separator as an
end-of-line BMP. Runoff would flow through the separator before being discharged to the City
storm drain system. The separator would be capable of removing floatables, oils, and
sediments from stormwater runoff. With incorporation of this and other post-construction
BMPs, the Project would not result in a significant long-term water quality impact.
3.10 Noise
N/A Noise Analysis.
Mitigation Measure 3.10-2: Implement noise reducing
measures for mechanical equipment.
Impact 3.10-2: Operation of building equipment could result in noise impacts on adjacent
properties.
Revised project plans and
specifications, if applicable.
After
development of
draft plans and
specifications.
City of Santa
Rosa
Department of
Community
Development
Prior to
issuance of
building permits.
Qualified
Acoustical
Consultant
Construction
Contractor
Once specific pieces of equipment and their locations are
chosen, a detailed noise analysis shall be conducted by a
qualified acoustical consultant to assess the need for
noise reduction measures. If the study shows that, after
implementation of the Project, noise levels as measured
at the property line would exceed either the ambient noise
levels by 5 decibels A scale (dBA) or applicable noise
criteria, some or all of the following noise insulation
features will be incorporated into the Project design, as
necessary and appropriate:
The Project would place the Community Care Center building south of Gullane Drive opposite
the existing residences on the north side of the roadway; the Main Building would be directly
south of the Care Center. These uses are expected to generate noise caused by parking lot
use, maintenance activities, and the operation of building mechanical equipment. Based on
the site plan, the service yard will be located opposite the Care Center from the existing
residences. This is likely the location for service-related items such as trash enclosures and
may be where the major mechanical equipment for the building is located. However, no
mechanical equipment plans or equipment specifications have been developed for the
Project, so mechanical equipment may be located on the Care Center rooftop. The location of
equipment on the rooftop, while unlikely to increase noise levels above the existing Ldn in the
neighborhood north of the Project site, could be noticeable to the adjacent neighborhood,
depending on the placement and type of equipment used. Thus, without mitigation, the
operation and use of the Project may result in a significant noise impact on the adjacent
neighbors.
• Specify all rooftop mechanical equipment with the
manufacturer’s ‘low noise’ option, if available.
• Locate rooftop mechanical equipment in the center
or southern portion of the roof to maximize the
distance from the equipment to the residences to the
north of the Project site.
• Incorporate a parapet wall around the periphery of
the building rooftop, with a height equal to or greater
than the height of the piece of rooftop equipment. To
ensure this parapet wall acts as a noise barrier, it
should be built without cracks or gaps in the face or
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