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underground gasoline storage tank site has been remediated and is no longer under regulatory oversight. PST Oakland Storage is a RCRA-registered waste generator. No releases or hazardous waste regulation violations were reported for the hazardous waste generator. Based on regulatory database information, neither of these sites would have the potential to affect the proposed project. Tank farms to the north and west of the project site, although not listed in the regulatory record search, have also reported releases of hazardous materials. The PST Tank Farm is about 300 feet north of the project site across Oyster Bay Slough; other tank farms are located further north. The former PST Tank Farm is part of Regional Water Quality Control Board, San Francisco Region (RWQCB),Cleanup Order R2-2002-0013. The HumblelPST facility reported a spill in March of 1981 where an unknown quantity of fuel was released, soaked through a containment berm and into a ditch and adjacent wetlands (R WQCB, 2002). The PST Tank Farm has undergone interim remediation (2004/2005) under RWQCB oversight (soil removal and groundwater monitoring). It does not appear likely that releases from the PST Tank Farm will affect development of the project since the extent of contaminated soil and groundwater has been defmed, and interim remediation has been undertaken. Impact VB-I: Potential impacts from soil contaminants in fill Mitigation Measure VII-I: A Phase II soil investigation should be conducted to evaluate the chemical quality of fill materials that will be encountered at the two bridge abutments. Up to two samples from each bridge abutment in areas of proposed excavation should be collected and analyzed for total petroleum hydrocarbons as gasoline, jet fuel, diesel, and motor oil (EP A Method 80I5M), semi-volatile organic compounds (EP A Method 8270C), volatile organic compounds (EP A Method 8260B), and Title 22 metals (EPA Method 60IOA series). Depending on the initial laboratory results, additional analyses of soluble metals may be required using the Waste Extraction Test (WET) and Toxicity Characteristic Leaching Procedure (I'CLP) to properly classify soils proposed to be excavatedfor the project. Depending on the findings of the Phase II investigation, additional soil management and construction worker health andsafety procedures may be required. These measures may include a site-specific health and safety plan to ensure that construction activities do not affect the health and safety of construction workers or nearby workers and recreational area users. The health and plan should include a summary of environmental investigations at the site, health and safety provisions for monitoring exposure to construction workers, procedures to be undertaken in the event that previously unreported contamination or subsurface hazards are discovered, dust control measures (including perimeter monitoring) for construction activities at the site, and emergency procedures and responsible personnel. Y4204IS.00693.doc - 4/5/07 -25-