Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

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' . . . - Representative Roadway Assessment Project Experience • State of California Department of Transportation; Richmond, California-Project manager for a wetlands mitigation project for CalTrans on three abandoned landfills adjacent to San Francisco Bay. The project objective was to determine which site would be most suitable for wetlands mitigation based on the volume of contaminated soil to be removed and the potential for soil left in-place to sustain wetland habitat. The project included a soil-gas survey for methane and halogenated volatile organics, soil sampling of each of the landfills, installation of temporary monitoring wells, surface and groundwater sampling, extensive data analyses, and report preparation. The work was conducted under the State of California Department of Toxic Substances Control. • State of California Department of Transportation; Solano County, California-Project manager for a site investigation for CalTrans for the widening of US-29 in Solano County California. The project objective was to determine whether soil and groundwater generated during construction activities would be handled as hazardous waste. The project included the drilling of over 150 borings along the highway, as well as the collection of over 25 surface water samples. • State of California Department of Transportation; Emeryville, California-Project manager for a site investigation for CalTrans at the "Maze" (the busiest freeway intersection in Northern California). The project was conducted as part of the seismic retrofit program. The project objective was to evaluate whether soil and groundwater generated during seismic retrofitting would be handled as a hazardous waste. The project included the drilling of over 120 borings and the analyses of these samples for metals, volatile organics, semi-volatile organics, and PCBs. Representative Petroleum Project Experience • Texaco USA; Healdgburg, California-Project manager for installing six monitoring wells, as well as abandoning two existing monitoring wells and one recovery well at the Healdgburg site. The monitoring wells were drilled to identify the horizontal and vertical extent of petroleum hydrocarbon contamination associated with a leaking underground storage tank in a dual aquifer system. The monitoring wells were continuously cored to insure that the well screens were entirely in the upper and lower aquifers. The analytical data was utilized to create a concentration map of petroleum hydrocarbons on a lithologic cross-section to identify contaminant migration pathways. • Unocal Corporation; San Carlos, California-Project manager for an investigation and remediation program under the jurisdiction of San Mateo County Office of Environmental Health. During an underground pipe refitting at the subject property, soil contamination was noted underneath two of the dispensers. PSI personnel, using on-site vapor meters, differentiated contaminated from clean soil and supervised the exca�ation of the contaminated soil. PSI drilled conformational borings at site to insure that contaminated soil had been exca�ated. PSI completed a cost analyses of disposal options for the soil and concluded that disposal at a recycling facility would be the most cost-effective remediation option. • Secured Capital Corporation; Northern California and Nevada-Project manager for four projects conducted concurrently in Northern California and Nevada associated with the investigation of LUST. The projects were part of a property transaction and were completed within a three-week timeline. The work was conducted at a post office, Pacific Bell yard, and two Pacific Gas and Electric yards. The projects included the drilling of numerous borings and the collection of soil and grab groundwater samples adjacent to USTs. File Name: PossF.doc Revised:8/06