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• Summary Report <br /> Environmental Investigation and Remediation <br /> Cheaper Store #76 <br /> 890 North Main Street <br /> Manteca, California <br /> 1. Background <br /> The project site is located on the southeast corner of the intersection of Jason <br /> and Main Streets to Manteca, California (see Figure 1 - Site Location Map). <br /> The site measures about 0 5 acres in size and has a single structure in the <br /> eastern portion of the site and gas pumps under a canopy near Main Street. <br /> The site is paved except for a landscaped areas near the corner and along the <br /> southern property line Two 10,000 gallon double walled underground <br /> gasoline storage tanks are between the store and the gas islands. The site is <br /> currently used as a convenience store facility and retails gasoline. <br /> On February 25, 1987, two 10,000 gallon steel tanks were removed by <br /> California Petroleum Egwpment from the subject site. Six soil samples were <br /> collected by Kleinfelder during tank removal, four from under the tanks and <br /> • two under the pump island The samples were analyzed for TPH-g, BTX and <br /> total lead. Some samples had detectable amounts of these compounds, as <br /> shown below. <br /> Sample I.D. TPH-gas benzene toluene xylenes lead <br /> 1 12 0 018 0 025 0 077 < 1 <br /> 2 ND<1 0 ND<0 010 ND<0 010 ND<0 010 < 1 <br /> 3 ND<1 0 0 030 ND<0 010 ND<0 010 1 <br /> 4 ND<1 0 ND<0 010 ND<0 010 ND<0 010 3 <br /> 5 112 0 013 0 417 193 1 <br /> 6 36 0 028 0 046 0147 4 <br /> The samples were also tested for ethylene dlbromide, diesel, kerosene, motor <br /> oil, other petroleum hydrocarbons and C9 to C36 compounds The samples <br /> were non-detect for those compounds. <br /> Soil pile samples collected on February 26, 1987 showed no TPH-g, but had 1.3 <br /> and 5.3 ppm of C9 -C36 compounds, and one sample had 10 ppb toluene and <br /> 1,720 ppb xylenes. <br /> On March 5, 1987, Kleinfelder consultants reported that 3 monitor wells <br /> (MW-1 through MW-3) were installed on March 2, 1987, south, north and <br /> northwest, respectively, of the former underground storage tank location <br /> • The wells were developed and sampled March 3, 1987. Groundwater was <br />