I. Summary
Other Agencies
Agencies other than the City and the County have authority over changes to Salado Creek in the Patterson Gardens project.
• U.S. Army Corps of Engineers (Section 404 permit).
Regional Water Quality Control Board (Section 401 certification). • California Department of Fish and Game (Section 1603 Streambed Alteration Agreement).
B. SUMMARY OF ENVIRONMENTAL IMPACTS AND
MITIGATION MEASURES
A summary list of environmental impacts identified for the West Patterson projects, and mitigation measures that would avoid or reduce significant impacts, is provided in Summary Table 1. Significance before and after mitigation is indicated. The organization of topics in the table is the same as in Chapter III, Environmental Setting, Impacts, and Mitigation Measures.
Turnstone Consulting, T053 1.9 West Patterson Projects, Final EIR .
For City of Patterson Certified January 9, 2003
I. Summary
Table S.1: Summary of Impacts and Mitigation
Topic Impact(s) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Land Use A.1. Development of the business Less than No mitigation necessary. Less than park and residential uses of the West Significant Significant Patterson projects may create
potential land use compatibility
conflicts with surrounding, ongoing
agricultural operations.
A.2. Development under the West Less than No mitigation necessary Less than Patterson Business Park Master Significant Significant
Development Plan may create the
potential for conflict between the
proposed commercial and light
industrial uses of the Plan and future
adjacent residential uses across
Baldwin Road.
A.3. Development of the business Less than No mitigation necessary Less than park and residential uses of the West Significant Significant Patterson projects may create
potential land use compatibility
conflicts with existing Patterson
Airport operations.
A.4. The expansion of the City's Less than No mitigation necessary Less than wastewater treatment plant may Significant Significant
create potential land use
compatibility conflicts with existing
nearby rural residences.
Turnstone Consulting, T053 1.10 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Agricultural C.1. Implementation of the West Significant C.1: Development agreements established Resources Significant,
pursuant to the West Patterson projects shall Unavoidable provide for the following prior to issuance of
agricultural land. any building permit: an applicant seeking a building permit shall supply documentation
acceptable to the City or County that the
applicant has contributed to the California
Farmland Conservancy Fund for the purposes
C.2. Development of the business Less than No mitigation necessary Less than park and residential uses of the West Significant Significant Patterson projects may create
potential land use compatibility
conflicts, burdening surrounding
Turnstone Consulting, T053 I.11 West Patterson Projects, Final EIR For City of Patterson
Certified January 9, 2003
missimo
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
C.3. Implementation of the West Significant C.3: Same as Mitigation Measure C.1. Significant, Patterson projects would contribute Unavoidable
to the cumulative loss of prime
agricultural land in the West
Patterson project vicinity.
Biological D.1. Development of the West Significant D.1.a+b: Either purchase or dedication of a Less than Resources Patterson Project area would result in permanent easement, at a ratio of 2:1 (two Significant loss of habitat for, and potential take acres replaced for each acre developed), of of, San Joaquin kit foxes. land west of I-5 in Stanislaus County, OR developed acre to either the County, the Center
for Natural Lands Management, the California
Wildlife Foundation, or CDFG to establish a
free movement corridor in Western Stanislaus
shall be minimized. All excavated holes or
trenches, more than two feet deep, shall be
covered after each working day, or equipped
with escape ramps. All construction pipes
stored at the site overnight shall be inspected
for kit foxes. All food-related trash items shall
be removed at least once a week from
construction sites.
Turnstone Consulting, T053 1.12 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
D.2. Development of the West Significant D.2: a) A qualified ornithologist shall conduct Less than Patterson project area and pre-construction surveys for Swairson's hawk Sigaificant wastewater evaporation pond sites) nests at appropriate times. If a nest site is would result in loss of foraging found, consultation with the CDFG shall be habitat for Swainson's hawks.
protected either by placement of a permanent
conservation easement on agricultural lands or
other suitable foraging habitat, or by payment
of an in-lieu fee of $600 per developed acre, to
be held by an agency approved by CDFG for
the ultimate purpose of purchasing permanent
conservation easements over Swainson's Hawk
foraging habitat.
D.3. Development of the.West Significant D.3: Pre-construction surveys for burrowing Less than Patterson project area and owls shall be conducted by a qualified biologist Significant wastewater evaporation pond site(s) per CDFG guidelines, prior to any soil-altering would result in loss of habitat for
burrowing owls and potentially could activitya ion urto and aworize ion by CDFG result in take of individual burrowing shall be required. Mitigation proposed for owls. Swainson's hawk, and/or kit foxes would
benefit burrowing owls, and more than
compensate for any potential impacts to owls.
Turnstone Consulting, T053 I.13 West Patterson Projects, Firal EIR For City of Patterson
Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
D.4. Excavation of Salado Creek on Significant D.4: The channel and banks of Salado Creek Included in Less than the Patterson Gardens site would shall be restored and enhanced. The creek shall Patterson Significant impact 0.36 acres of Jurisdictional Gardens
Waters. project
using a coferdam, and shal be pled around
practices shall be used during construction for
erosion and sedimentation control.
D.5. Development of the West Significant D.5: a) If feasible, demolition and construction Less than Patterson project area would shall be scheduled to avoid the raptor nesting Significant potentially result in disturbance of season, from January to August. b) If not nesting raptors during construction. feasible, pre-construction surveys for nesting raptors shall be conducted by a qualified
ornithologist or biologist to ensure that no
raptor nests will be disturbed during project
implementation. With the approval of the
CDFG, trees containing known or potential
raptor nest sites may be removed to discourage
future nesting attempts on the condition that no
raptor pair is currently utilizing the site. If a
nest is found close enough to a construction
/demolition area to be disturbed, the
ornithologist, in consultation with CDFG, shall
determine the extent of a construction-free
buffer zone to be established around the nest.
Turnstone Consulting, T053 I.14 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
D.6. Certain construction activities Significant Less than could potentially affect western pond Significant
turtles.
Significant D.7: The biological mitigation site at the north Less than edge of the existing wastewater treatment plant Significant shall be avoided during construction so that its
function as a mitigation site is not adversely
affected.
wastewater treatment plant.
D.8. Construction activities could Significant D.8: No construction activities may occur Less thar inadvertently impact riparian within a 100-foot setback from the riparian Significant woodland located adjacent to the woodland adjacent to the northeastern-most sortheaster-most percolation pond percolation pond site. The setback area shall appropriate control measure to minimize runoff
D.9. Development in the West Less than No mitigation necessary Less than Pose of grier an adrause Significant Significant
habitats.
Turnstone Consulting, T053 I.15 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
D.10. Development of the West Less than No mitigation necessary Less than Pass of earnet area all cause Significant Significant
associated with man-made ponds.
D.11. Development of the West Less than No mitigation necessary Less than Patterson project area would result in Significant Significant drainage fatureic habitat in linear
D.12. Development of the West Less than No mitigation necessary Less than Patterson project area would result in Significant Significant impacts to habitat for certain special-
D.13. Development of the West Less than No mitigation necessary other than measures Less than Patterson project area would result in Significant Biologid sure inded inspect IT DI Significant impacts to nesting habitat for the
pp. III.D.53 to III.D.54 for nesting raptors.
Transportation E.1. Traffic generated by full buildout Significant E.1: The City and County shall construct Included in Less than and of the proposed project would affect improvements at 12 intersections, including project Significant Circulation traffic levels of service at local signalization and additional turn lanes, as new intersections in the project vicinity in buildings are constructed and occupied in the the near-term Existing-plus-Project West Patterson project area with sufficient scenario. employment to cause LOS to deteriorate below
City standards. The City and/or County shall
establish a community facilities funding district
or other financing mechanism, and developers
shall contribute a fair share of the costs of traffic
mitigation (see pp. III.E.21-22 for intersections.)
Turnstone Consulting, T0S3 1.16 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
E.2. Traffic generated by buildout of Less than No mitigation necessary Less than the proposed West Patterson projects Significant Significant would affect levels of service on
freeway and roadway segments in
E.3. The West Patterson projects Less than No mitigation necessary Less thar. would contribute to the demand for Significant Significant bicycle and pedestrian facilities in
the area.
E.4. Construction and occupation of Significant E.4: The City of Patterson and Stanislaus Less than hold after ratio service levels at intersey tibal contes imy Ave and at other Significant local intersections in the project locations, including new traffic signals and study area when added to existing additional left, through and right turn lanes as traffic volumes.
the Keystone Pacific Business Park with
sufficient employment to cause LOS to
deteriorate below City and County standards.
The project sponsors shall participate in a
community facilities funding district or other
funding mechanism. (See pp. III.E.27-28.)
Turnstone Consulting, T053 I.17 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
CT C
I. Summary
•Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
E.5. Construction and occupation of Significant E.5: The City and County shall construct Less than Patterson Gardens would affect improvements at 3 intersections, including new Significant traffic service levels at local traffic signals and left turn lanes, as phases are intersections in the project study area occupied in Patterson Gardens with sufficient when added to existing traffic population to cause LOS to deteriorate below volumes. standards. The Keystone Corporation shall
participate in the existing community facilities
funding district to fund these improvements
(see p. III.E.30).
E.6. The West Patterson Projects Significant E.6: The City and County shall construct the Less than would contribute considerably to identified improvements at 19 intersections, Significant future cumulative significant traffic including new traffic signals, road widening, impacts at local intersections. and creation of left, through, and right turn lanes. A funding mechanism shall be
established requiring developers to contribute a
"Sae p. I 3 6-390t of these improvements
E.7. Cumulative traffic, including Significant Although widening the freeway would reduce Significant, traffic generated by the West this impact, only Caltrans has the jurisdiction Unavoidable Patterson projects, would contribute to implement such a measure. to unacceptable levels of service on
Interstate-5 in the vicinity of the
Sperry Avenue interchange.
Turnstone Consulting, T053 1.18 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
E.8. The Keystone Pacific Business Significant E.8: The City and County shall construct Less than Park would contribute considerably improvements at 10 intersections, including Significant to future cumulative significant new traffic signals, and left, through and right traffic impacts at local intersections. turn lanes. A community facilities funding district, or other funding mechanism shall be
established requiring the Keystone Pacific
Business Park developer (or developers) to
contribute to the cost of these improvements
(see pp. III.E.42-43).
E.9. The Patterson Gardens project Significant E.9: The City and County shall construct Less than would contribute considerably to improvements at 6 intersections, including new Significant intracts at local eternitians traffic community acites distict shal be established requiring the Patterson Gardens
developer to contribute to the cost of these
Turnstone Consulting, T053 I.19 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Air Quality F.1. Construction activities would Significant Fugitive dust emissions
seneraremisors of cold cause or less than
contribute to violations of the air slaver fan dearing, elbig cut angi and significant. quality standards.
Ozone
precursor
emissions
operations shal limit or remove the accumulation significant, unavoidable
of mud or dirt from adjacent public streets at the
end of the day. All storage piles shall be
stabilized with water or chemicals. Any site with
150 or more vehicle trips per day shall prevent
carryout and track out. Speeds on unpaved roads
shall be 15 mph. Control measures shall be
installed to prevent silt runoff to public roadways.
following procedures: install wheel washers for
exiting trucks, install windbreaks at windward
sides of construction areas, and suspend
excavation and grading in winds of over 20 mph.
b) Ozone precursors shall be limited, where
possible, by: use of alternative fueled or catalyst
Equi, ed riled equipment, minimal lating tine
for all equipment; electrically driven equipment;
and curtailed construction activities during
periods of high pollutant concentrations.
Turnstone Consulting, T053 1.20 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
F.2. Emissions from motor vehicles Significant Less than dause localy priet ran of a one Sign ficant
F.3. The new uses allowed under the Significant F.3: The Business Park Plan shall include Included in Less than West Patterson Business Park Master adequate buffer zones for TACs and odors by Keystone Significant Development Plan could cause prohibiting centers of intense diesel vehicle Pacific emissions of toxic air contaminants activity or odor sources from locating near Business (TACs) or odors.: existing or planned residences, schools, or Park other sensitive uses.
Less than No mitigation necessary Less than
Significant Significant
Cause increased emissions could
F.5. The expanded wastewater Significant, F.5: The City shall ensure that appropriate Significant, treatment plant and new percolation Unavoidable engineering controls have been incorporated Unavoidable ponds would result in increased odor into the design and construction of the generating potential that could affect proposed wastewater treatment and nearby residents. conveyance facilities to minimize production of objectionable odors. During operation of
the expanded facilities the City shall ensure
thats are fei nint propesig by per sudically
shout godoravel dors be presentaclities.
City shall take appropriate action to correct
Turnstone Consulting, T053 1.21 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
COCO
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
F.6. Emissions from increased motor Significant, F.6: a) The Business Park Plan shall Significant, vehicle activity and new area sources Unavoidable incorporate park-and-ride lots, require new Unavoidable associated with the project could uses/occupants employing 100 or more full- cause or contribute to ongoing time-equivalent employees to submit to the violations of the ozone and PM1o reviewing authority an employee trip reduction standards. - Included,
Patterson
Gardens
- Included,
Keystone
Business
Park and
Patterson
light industrial development projects to Gardens
incorporate measures such as pedestrian
amenities and bicycle parking to reduce vehicle
trips and on-site parking demand. d) The West
cooling and lighting alrighour the procent,
of charcoal or wood barbeques.
Turnstone Consulting, T053 1.22 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included Mitigation
in Project
F.7. Emissions from increased motor Significant, F.7: Implement Mitigation Measures F.6(a). F.6.0 Significant, vehicle activity and new area sources Unavoidable F.6(c), and F.6(d) included Unasoidable associated with the Keystone Pacific
Business Park could cause or
contribute to ongoing violations of the
ozone and PM,, standards.
Turnstone Consulting, T053 1.22a West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
side action an evered tor Significant, F: 8(0), ane-s Mitigation Measures F.6(b), F.6.b and Significant, Unavoidable F.6.0 Unavoidable
associated with the Patterson included
Gardens proposal could cause or
contribute to ongoing violations of
the ozone and PM,, standards.
Significant, 159: laped mit Mpaction Measures Shaviantic Unavoidable
West Patterson projects could delay
the region's progress in attaining the
air quality standards.
F.10. The cumulative air quality Significant, Ff, and Fa Mitigation Measures F. 6(a), F.6.c Significant, effects of development of the Unavoidable included Unavoidable Keystone Pacific Business Park
could delay the region's progress in
attaining the air quality standards.
F.11. The cumulative air quality Significant, F.11: Implement Mitigation Measures F.6(b), F.6.b and Significant, effects of development of the Unavoidable F.6(c), and F.6(d). F.6.c Unavoidable Patterson Gardens project could included
atay in rei gaily standards.
Turnstone Consulting, T053 1.23 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Noise G.1. Project-related construction Significant G.1: Construction activities shall be restricted Less thar:
could cause a substantial, though to the hours between 7:00 a.m, and 7:00 p.m., Significant intermittent and short-term, increase
Money hole provided or ali haily:.
construction equipment and all stationary noise
sources. Stationary noise sources shall not be
located near occupied dwelling units. Staging
areas shall be placed as far from existing
residences as possible.
G.2. Increased traffic, including Significant G.2: Improvements to Ward Avenue shall Less than truck traffic, could cause substantial provide acceptable future noise levels for Significant noise increases for existing sensitive existing residences by locating the centerline of receptors in the project vicinity. the road at least 110 feet from the outdoor activity areas of existing residences.
Improvements to Baldwin Road shall provide
acceptable future noise levels either by locating
the centerline of the road at least 210 feet from
existing and proposed residential outdoor
activity areas, or by improving the residential
Patterson Noise Element policy VII.E.6. The
Businesses that ac BaRdwins Road to reduce
Road.
Turnstone Consulting, T053 1.24 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
G.3. Light industrial activities and Significant Requirebo prot ind an acoustical analysis Included in Less than Keystone Significant
Busines frank plan one certa demonstrating that adequate setbacks or other Pacific noise levels inconsistent with the noise mitigation features are incorporated for Business uses that would not be conducted entirely Park
Compairie gounty's noise
intensive industrial operations not concentrated
industrial uses adjacent to Baldwin Road shall
be designed so that truck-loading operations
G.4. Routine operation of the City's Less than No mitigation necessary Less than wastewater treatment plant Significant Significant
expansion could cause operation of
noise sources exceeding the City's or
existing residences near the platt..
G.5. Noise from ongoing agricultural Less than No mitigation necessary Less than Significant Significant
could periodically exece City s
noise exposure goals for Patterson
Gardens residences.
Turnstone Consulting, T053 1.25 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
G.6. Increased traffic, including Significant G.6: Improvements to Baldwin Road shall Less than truck traffic, from the Keystone provide acceptable future noise levels for Significant Pacific Business Park could cause residences on Baldwin Road between Sperry substantial noise increases for Avenue and the Keystone Pacific site, either by existing sensitive receptors along locating the centerline of the road at least 140 feet from the homes' outdoor activity areas or
by improving the residential properties to
satisfy the goals of City of Patterson Noise
G.7. Light industrial activities and Significant G.7: Implement Mitigation Measures G.3.a Included in Less than and G.3.b if the Keystone Pacific Business Keystone Significant From shoe described in Cheer I, Prage Pacific
Business
inconsistent with the City's or the Park
County's noise compatibility goals.
G.8. Increased traffic from the Less than No mitigation necessary Less than Patterson Gardens proposal could Significant Significant cause noise increases for existing
sensitive receptors in the project
Turnstone Consulting, T053 1.26 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
G.9. Cumulative development, Significant Less than
including the West Patterson projects Significant
could lead to noise conflicts between
incompatible land uses.
handling systems that enable windows facing
traffic to be permanently closed; energy-
efficient windows; solid core exterior doors
with perimeter weather stripping; constructing
exterior walls with a ½-inch minimum
thickness fiberboard underlayer; installing roof
or attic vents facing traffic that are baffled;
Turnstone Consulting, T053 1.27 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Hydrology H.1. Placement of housing in areas Significant H.1: New construction and substantial Included in Less than and Water subject to flooding could result in improvement of any structure in Zone B shall Patterson Significant Quality severe hardship and property damage have the lowest floor elevation, including Gardens for project occupants. basement, elevated above the highest adjacent grade at least two feet. Upon completion of
the structure, the elevation of the lowest floor,
including basement, shall be certified by a
registered professional engineer or surveyor, or
verified by a community building inspector to
be properly elevated. Certifications shall be
provided to the floodplain administrator
Significant and insa prain of deser in omni design Included in Less than Keystone Significant
floodplain would increase the with the intent of the recommended drainage Pacific amount of runoff, potentially plan detailed in the 2001 Master Storm Business exacerbating existing local flooding Drainage Plan, City of Patterson, Western Park and problems. Expansion Area. The detention basins shall be Patterson designed so that flow to the creek could be Gardens
interrupted when insufficient capacity was
Avails. Designere onage plan for the
phase of the development of the West Patterson
projects shall be submitted to the City of
H.3. The increase in impervious Less than No mitigation necessary Less thar surfaces could adversely affect Significant Significant groundwater recharge.
Turnstone Consulting, T053 1.28 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
H.4. Construction activities and post- Significant Less than construction land uses could result in Significant
negat sir of water bodies by
reducing the quality of storm water
runoff.
facility expansion project. The SWPPP would
act as the overall document designed to provide
measures to mitigate water quality impacts. At
a minimum, BMPs shall include practices to
minimize the contact of construction materials,
equipment, and maintenance supplies with
storm water. Regular tailgate meetings shall be
held to educate personnel on pollution
prevention. An independent monitoring
reduce erosion of exposed soils shall be
implemented. The SWPPP shall include
measures designed to mitigate potential water
quality degradation of runoff from all portions
of the completed development. The final
design team for each development shall review
and incorporate the concepts included in the
Start at the Source, Design Guidance Manual
for Stormwater Quality Protection.
Turnstone Consulting, T053 I.29 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measures) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
H.5. Existing water supply wells in Significant H.5: Prior to approval of a grading plan for Less than the project area, if not properly development of a particular parcel or subarea Significant managed or decommissioned, could of the project area, a well survey shall be be damaged during construction, conducted to determine the location and potentially allowing impacts to characteristics of each well. The water supply groundwater quality. wells shall either be properly abandoned in compliance with the California Department of
Water Resources, California Wells Standards,
and Stanislaus County Code, or inspected by a
qualified professional to determine whether
each well is properly sealed to prevent
infiltration of water-borne contaminants into
the well casing or surrounding gravel pack. If
this of hiremen, the apican s complai with
qualified well driller to install the required seal.
H.6. The City's proposed wastewater Less than No mitigation necessary Less than treatment plant expansion could Significant Significant impair grourdwater beneficial uses
H.7. The proposed change in land Less than No mitigation necessary Less than use at the project area could affect Significant Significant regional groundwater quality.
Turnstone Consulting, T053 1.30 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
FT 1.
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation , Included Mitigation
in Project
Water I.1. Treatment of groundwater would Significant, If the City elects to use evaporation and disposal Significant, Supply Unavoidable of solid salts as a method of brine disposal, the Unavoidable of come there bil of tate guanies City shall require new development to pay its byproduct of groundwater treatment. pro-rata share of the cost of an agricultural conservation easement, in the manner discussed
in Mitigation Measure C.1, for the acreage
converted for use as evaporation ponds.
Turnstone Consulting, T053 I.30a West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Less than No mitigation necessary Less than
ConSume sausantiament would Significant
Significant
I.3. Pumping groundwater to serve Significant, I.3: a) The City shall sample groundwater Significant, the West Patterson projects and Unavoidable semiannually to assess water quality, and shall Unavoidable other existing and planned demand conduct additional studies to better understand could create a severe "cone of direction and rate of groundwater flow in the depression" beneath the City's well confined aquifer. This will allow the City to field.
I.4. Supplying water to the West Less than Less than
Significant Significant
conveyance infrastructure into
previously unserved areas.
Turnstone Consulting, T0S3 1.31 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
Certified January 9, 2003 For City of Patterson
West Patterson Projects, Final EIR 1.32 Turnstone Consulting, T053 depression.
source would cause a cone of
Significant Significant prior to switching to a surface-water Less than No mitigation necessary Less than Variant I.3. Pumping groundwater assis them isusely pursued by the City to
surface-water supplies at its disposal to current
shall provide information about alternative those users. available from a number of sources. The City sources, with attendant effects on by the City to switch to other water
obtain replacement surface-water supplies. existing users of a supply obtained Unavoidable could be mitigated if existing users were to unavoidable surface water variant could cause Significant, Variant I.2: Impacts on groundwater supplies Significant, Variant I.2. Implementation of the adversely affect water quality in the
Significant Significant
Less than No mitigation necessary Less than
County's water well ordinance.
Significant City shall comply with all aspects of the Significant Less than Included 1.5: To avoid contaminating the aquifer, the Potentially I.5. Operation of existing wells and Project
Mitigation Included in Mitigation
after Measures Prior to
Significance Mitigation Mitigation Measure(s) Significance Impacts) Topic I. Summary
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Variant I.4. Supplying water to the Less than No mitigation necessary Less than West Patterson projects would Significant Significant
require extension of water supply
conveyance infrastructure into
previously unserved areas.
Variant I.5. Supplying water to the Significant, None determined to be available until a West Patterson projects with surface Unavoidable treatment plant is designed and its location Sharitable water would require construction of a
water treatment plant.
Variant I.6. Installing new wells, Potentially Variant I.6: The City shall comply with the Included Less than Significant County's water well ordinance. Significant
ASR system would introduce new
Wastewater J.1. The City's wastewater collection Significant J.1: The project sponsors for Patterson Less than systems would not have adequate Gardens and the Keystone Pacific Business Significant capacity to serve the West Patterson Park, and project applicants for future projects and adjacent approved development in the Business Park Plan area shall construct all necessary wastewater system
improvemons on the apier districteribure Patterson
Gardens
construct these improvements. The City shall,
through a combination of sewer development
fees and other funding mechanisms, ensure that
new development pays its share of the costs of
Turnstone Consulting, T053 1.33 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
....
1. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
J.2. The West Patterson projects Significant J.2: Project applicants for future development Less than in the Business Park Plan area shall participate Significant would energ apacity er in less in a new CFD or similar financing district wastewater treatment facility. established to finance the necessary second wastewater treatment plan expansion of 0.5
mgd.
J:3. The City's proposed wastewater Less than No mitigation necessary Less than colt excel the wastewalerice Significant Significant
treatment requirements of the
Regional Water Quality Control
Board.
J.4. Wastewater generated by past, Less than No mitigation necessary Less than present, and future cumulative Significant Significant
projects would exceed the capacity
of the City's wastewater treatment
facilities.
J.5. Wastewater treatment facilities Less than No mitigation necessary Less than expansion would result in excess Significant Significant capacity of about 0.3 million gallons
Turnstone Consulting, T053 1.34 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Geology and K.1. Development of the West Less than No mitigation necessary Less than Seismicity Patterson projects could expose new Significant Significant residents and employees to geologic
hazards and seismic risks.
Hazards L.1. New residents in Patterson Less than No mitigation necessary Less than Gardens and students at the school Significant Significant site in the Patterson Gardens site
could be exposed to hazardous levels
L.2. Demolition of existing Potentially L.2: An investigation shall be made of each Less than preter a or on the wastewater Significant structure scheduled for demolition, focusing on Significant asbestos and lead-based paint. Removal must
percolation pond sites could release be conducted according to OSHA and other hazardous chemicals such as regulations.
asbestos or lead.
L.3. Agricultural spraying operations Less than No mitigation necessary Less than in the West Patterson project area, Significant Significant and storage of chemicals at the
Patterson Airport could expose
residents and businesses to
hazardous materials.
Community M.1. The project would generate Less than No mitigation necessary Services about 800 additional school-aged Significant signs hand children which would increase the
demand for school facilities.
Turnstone Consulting, T053 1.35 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
man
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
M.2. The expansion of employment Less than No mitigation necessary Less than Significant
bourhunds with Scher-ageay attract Significant
children resulting in a secondary
impact on area schools.
M.3. Development of the proposed Less than No mitigation necessary Segritant increase the demander construction Significant
of additional fire protection facilities.
Less than No mitigation necessary Less than
West Pattersom proo the proposed Significant Significant increase the demand for police
facilities.
M.5. Development of the proposed Less than No mitigation necessary Significant
M.6. Development of the Patterson Less than No mitigation necessary Less than Gardens proposal would generate the Significant Significant need for additional parkland and
recreational facilities to serve new
N.1. Development of the West Less than No mitigation necessary Less than Housing ad Patterson projects would cause the Significant Significant Employment City to exceed regional population
Turnstone Consulting, T053 1.36 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003
I. Summary
Topic Impacts) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
N.2. Development of the proposed Significant N.2: The City shall, through a combination of Less than West Patterson projects would development fees, a community facilities Significant induce substantial growth in financing district, or other funding undeveloped areas and require mechanisms, ensure that new development extension of major infrastructure.
cays is share of infrastructure and service
N.3. Development of the proposed Less than No mitigation necessary Less than West Patterson projects would Significant Significant
displace existing housing and
Visual No mitigation necessary Less than
Resources Sigrificant
O.2. Development of Patterson Less than No mitigation necessary Less than Gardens and the Business Park Plan Significant Significent area would alter views of the Diablo
Range for pedestrians and motorists
on Sperry Avenue.
Gardes site ment of langratterson Less than No mitigation necessary Less than Significant Significant
• existing expansive agricultural visual
character of the project vicinity.
0.4. Development under the West Less than No mitigation necessary Less than Patterson Business Park Master Significant Significant
Development Plan / Keystone Pacific
Business Park Proposal would
shanel that visual character of the
Turnstone Consulting, T053 1.37 West Patterson Projects, Final EIR For City of Patterson
Certified January 9, 2003
arminari
I. Summary
Topic Impact(s) Significance Mitigation Measure(s) Mitigation Significance Prior to Measures after
Mitigation Included in Mitigation
Project
Cultural P.1. Development of the West Less than No mitigation necessary Less than Resources Significant Significant
P.2. Development of the West Less than No mitigation necessary Less than Significant Significant
Turnstone Consulting, T053 T.38 West Patterson Projects, Final EIR For City of Patterson Certified January 9, 2003