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in water, contributing to the low mobility of contaminants in surface water and in groundwater. The California Regional Water Quality Control Board has concurred with this finding. Therefore, the potential for contamination of surface water and groundwater in the adjacent wetlands is low and no significant effects are expected. Also, the Mitigation and Monitoring Plan (RMI, 1995) outlines additional contaminant testing during the construction of channel alignments, as well as soil sampling, chemical testing of samples, and monitoring the biological diversity of the restored marsh for at least a five-year period after construction. A.3 POTENTIAL IMPACT: Potentially significant impacts to water quality from sedimentation could result during construction. FINDING: Measures described in the U.S. Army Corps of Engineers' Section 404 permit and in the GDP EIR (Measure 3.2.2) are incorporated in the project and will reduce this potential impact to less than significant. STATEMENT OF FACTS: Construction activities could result in increased erosion, resulting in sediment accumulation and impacts on water quality. Several measures described in the U.S. Army Corps permit and the GDP EIR (Measure 3.2.2) are required to reduce erosion and sedimentation during construction. These measures limit construction to the dry season, require revegetation prior to the rainy season, require silt fences and other erosion control measures, restrict stockpiling, require the establishment of exclusion areas and include on -site inspections. B. BIOLOGICAL RESOURCES B.1 POTENTIAL IMPACT: Approximately 13.2 acres of low and moderate value wetlands would be filled by PDP implementation for Phases 2A, 2B, and 3. FINDING: A comprehensive wetland enhancement and restoration plan has been approved by the Corps of Engineers and incorporated into the project which substantially lessens the potential significant environmental effect of displaced wetlands. STATEMENT OF FACTS: Approximately 13.2 acres of Corps jurisdictional wetland and potential salt marsh harvest mouse habitat would be lost as a result of development of Phases 2A, 2B and 3. The Corps has accepted as mitigation for the loss of these wetlands, the restoration and enhancement of 132 acres of disturbed upland and seasonal and diked salt marsh wetlands. Of the 132 acres slated for wetland mitigation, 16 acres of upland or disturbed areas would be restored to salt marsh habitat; thus, the PDP conforms with "S" Overlay Criterion Number 1, along with Corps of Engineers regulatory requirements under Section 404 of the Clean Water Act. The 1995 RMI Mitigation and Monitoring Plan outlines the objectives, implementation, performance criteria and monitoring efforts for this restoration. The GDP EIR (Mitigation Measure 3.3.2) and the U.S. Army Corps of Engineers permit require the implementation of the Mitigation and Monitoring Plan as a special condition of 4