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After the soil borings had been completed each borehole was tremied to ground surface with <br /> Portland cement containing 5%bentonite under the verbal authorization of Margaret Lagorio of the <br /> PHS-EHD. <br /> 2.1.2 Sample Locations and Sample Depths <br /> Soil boring 1 (SBA) was advanced in a shallow depression in the asphalt-covered parking lot <br /> approximately six feet from the rear entrance of Quality Cleaners.This location was selected due to <br /> the potential for possible disposal of waste PCE or PCE-impacted mop water. SB-2 was advanced <br /> approximately eight inches north of a steel containment dyke surrounding the dry cleaning machine <br /> and PCE storage containers (Please refer to Photographs 1 and 2). To reduce the potential for <br /> downward migration of possible residual PCE from the floor surface to subsurface soils and <br /> potentially groundwater, hand-operated machinery was not located within areas of floor staining. <br /> Discrete soil samples were collected from SB-1 and SB-2 at depths of approximately five and ten <br /> feet bgs. The ten-foot sample appeared to represent the capillary fringe (the soil/groundwater <br /> interface). The"grab"groundwater samples were collected from approximately 12 feet bgs in both <br /> SB-1 and SB-2. <br /> 2.1.3 Laboratory Analysis <br /> Soil and groundwater samples collected for laboratory analysis from SB-1 and SB-2 were submitted <br /> under chain-of-custody protocol to McCampbell Analytical, Incorporated, a State of <br /> California-certified laboratory located in Pacheco, California. The soil and groundwater samples <br /> collected were analyzed for halogenated volatile organic compounds(HVOCs)using United States. <br /> Environmental Protection Agency(U.S. EPA) Methods 8010/601. <br /> Ceres Associates 4 Project CA518-2 <br /> WFB-CMO.Quality Cleaners.Tracy,CA June 8,1999 <br />