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I� <br /> Treadwell8RO110 <br /> ' Immediately after collection, all samples were labeled, and placed in an iced cooler All <br /> groundwater samples and selected soil samples were submitted to STL Chromalab, a California <br /> state certified laboratory for analysis using chain of custody protocols <br /> All soil, groundwater and decontamination water generated during this scope of work were <br /> stored on site in drums pending analytical results All borings were closed by pressure grouting <br /> in accordance with San Joaquin County requirements <br /> 42 Laboratory Analytical Program <br /> Soil and groundwater samples were analyzed for <br /> 0 TPH-g and TPH-d by EPA method 8015M, <br /> • Benzene, toluene, ethylbenzene, total xylenes (BTEX) and MTBE by EPA Method 8021 <br /> for soil, and <br /> • VOCs (including BTEX and MTBE) by EPA Method 8260B for water <br /> ' 4,3 Investigation Results <br /> Tables 1 and 2 summarize the analytical results for soil and groundwater respectively from our <br /> January 2004 investigation, and the AGE'S June 2003 investigation <br /> 4 3 1 Soil Results <br /> No significant petroleum hydrocarbons were detected in the upper 15 feet of soil (CSB-6 had <br /> TPH-d at 6 6 mg/kg at 6 feet bgs) No TPH or VOCs were detected in the upgradient boring <br /> CS13-4 No BTEX or MTBE concentrations and relatively low concentrations of TPH-d and <br /> TPH-g, ranging 1 1 to 18 milligrams per kilogram (mg/kg) were detected in soil from borings <br /> CSB-1, CSB-3, CSB-5 and CSB-6 <br /> 5 <br /> 25971013 DGD 12 April 2004 <br /> i <br />