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Environmental Impact Statement - Sonoma Land Trust

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California Department of Fish and Game<br />

U.S. Fish and Wildlife Service<br />

Section 3.3. Water Quality<br />

existing leases would be terminated and the land managed as seasonal wetlands<br />

and saturated grasslands. Property transferred to USFWS would be similarly<br />

treated, though agricultural operations would may be allowed to continue subject<br />

to a Special Use Permit. Water quality impacts resulting from restoration-related<br />

construction activity, wetland inundation, changes in dissolved oxygen<br />

concentration, or changes in natural methylation processes would not occur under<br />

the No-Action Alternative; therefore, resulting in no new impacts. Maintenance<br />

of the existing levees would continue at a reduced level. These levees in their<br />

current state pose a flooding risk due to the potential failure and overtopping<br />

during storm events. This risk would continue to exist with the No Action<br />

Alternative. If the levees were to fail and uncontrolled flooding were to occur<br />

then, depending on the amount of water entering the site and the size of any<br />

breach(es), anoxic water conditions could occur in the site, and result in water<br />

with poor water quality being discharged from the site. Levee failure, especially<br />

uncontrolled breaching, could also result in temporarily elevated turbidity. These<br />

water quality effects would be transitory, as the site owner(s) would either have<br />

to repair the levee, or provide for enhanced circulation within the site.<br />

The Corrective Action Plan for the treatment of contaminated soils at the Sports<br />

Club shooting range site would not be implemented since placement of these<br />

soils within the core of a new flood control levee would not occur. This could<br />

result in a potentially significant impact. With implementation of Mitigation<br />

Measure WQ-MM-1, this impactRenegotiation of the CAP with the SFRWQCB<br />

would be considered less than significant.necessary (Northgate 2006). SLT and<br />

the RWQCB would renegotiate a revised CAP with the RWQCB, consistent<br />

with applicable regulatory requirements. The revised remedy would have to<br />

consider and address the potential for site flooding and uncontrolled breaching.<br />

Mitigation Measure WQ-MM-1: Prepare and Implement Revised<br />

Corrective Action Plan for Sports Club Shooting Range Site<br />

SLT or its contractors shall prepare and implement a revised Corrective Action<br />

Plan in order to remediate soils at the Sports Club Shooting Range site consistent<br />

with the requirements of the RWQCB’s Spills, Leaks, Investigations, and<br />

Cleanup Program. Specific actions and remedial measures required by the<br />

revised Corrective Action Plan shall be approved by the RWQCB.<br />

Conclusion: Less than Significant with Mitigation.<br />

Action Alternatives<br />

<strong>Impact</strong> WQ-1: Degradation of Surface Water and<br />

Sediment Quality due to Release of Pollutants during<br />

Construction<br />

Proposed Project<br />

Hazardous materials associated with construction equipment, including dredging,<br />

grading, and levee construction equipment, would be present onsite for the<br />

Sears Point Wetland and Watershed Restoration<br />

Project Final <strong>Environmental</strong> <strong>Impact</strong><br />

Report/<strong>Environmental</strong> <strong>Impact</strong> <strong>Statement</strong><br />

3.3-14<br />

April 2012

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