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ame0 <br />c7w <br />August 6, 2008 <br />Project 14527.000 <br />Ms. Margaret Lagorio <br />San Joaquin County <br />Environmental Health Department <br />600 East Main Street <br />Stockton, California 95202-3029 <br />Re: Phase ll Soil and Groundwater Sampling Work Plan <br />2130 West Washington Street, Stockton, CA <br />Dear Ms. Lagorio: <br />On behalf of Westway Feed Products, Inc. (Westway), AMEC Geomatrix, Inc. (AMEC) has <br />prepared this Phase II Soil and Groundwater Sampling Work Plan (Work Plan) for the Westway <br />Feed Products Facility at 2130 West Washington Street, Stockton, California (Site) (Figure 1). <br />In 2007 a Phase I Environmental Site Assessment (ESA) was performed by URS (URS, 2007). <br />The northern parcel, designated Parcel 2 in the ESA, has been occupied by Westway since <br />2003. During the 2007 ESA, several above ground storage tanks (ASTs) were observed to <br />show signs of leakage and soil staining near the railroad spur was also observed (URS, 2007). <br />This work plan has been prepared to assess the shallow groundwater impact by the leakage of <br />farm tanks and the soil impact near the railroad spur at the Site. This work plan includes the <br />background, purpose and scope of work for the proposed investigation. <br />BACKGROUND <br />The following section describes the background information at Westway Feed Products <br />Included are the geology and hydrology of the Site, land use, and previous investigations. <br />Geology and Hydrology <br />Stockton California lies within the San Joaquin valley geomorphic province. The area has low <br />topographic relief and has an average elevation of 5 feet above mean sea level (nisi). <br />Characteristic lithology of the area is dominated by marine deposits and fluvial deposits of sand, <br />silt, clay and gravel. Fluvial deposits are derived from the Sierra Nevada in the east and the <br />Coastal ranges in the west. Basin fill is approximately 3000 feet thick in the Site vicinity. <br />AMEC Geomatrix, Inc. <br />10670 White Rock Road <br />Rancho Cordova, CA <br />USA, 95670 <br />Tel 916-636-3200 <br />Fax 916-636-3208 <br />www.amecgeomatrixinc.com <br />AMEC Geomatrix