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Fel i <br /> PRIVILEGED & CONFIDENTIAL <br /> intervals, using a bristle brush, with a trisodium phosphate (TSP) solution; this was <br /> followed by two tapwater rinses. The sampler was dried by air prior to use. <br /> Boring Backfill <br />' Subsequent to the collection of soil and groundwater samples from the soil boring, the <br /> boring was backfilled. Prior to the backfilling of the boring a tremy hose was lowered to <br /> the bottom of the boring. Grout consisting of neat Portland cement was then pumped <br /> though the hose into the bottom of the boring. During pumping the hose was slowly <br /> removed. After the boring had been backfilled,the grout was allowed to settle, topped off, <br /> and a one-foot thick concrete cap was placed on top. <br />' Waste Disposal <br /> o al <br />' The soil cuttings and purge water produced during the site investigation were placed in <br /> DOT-approved drums and stored on-site pending analytical results. The soil cuttings and <br /> purge water will be transported off-site to a disposal/recycling facility by a licensed hauler <br />' in accordance with appropriate regulations. <br /> LABORATORY RESULTS <br />' TPH-g in Soil <br /> Selected soil samples analyzed from Boring B5 were reported to contain detectable <br /> concentrations of TPH-g, ranging from 1.3 to 590 milligrams/kilogram (mg/kg). The <br /> samples collected above 35 feet bgs which were submitted for analysis were reported to not <br /> to contain detectable concentrations of TPH-g. The deepest collected soil sample analyzed <br /> (Sample no. B5-78) was reported to contain 2.8 mg/kg of TPH-g. The laboratory results <br /> are summarized in Table 2, attached. Laboratory reports and chain-of-custody forms are <br /> included as Appendix C. <br /> BTEX and Fuel Oxygenates in Soil <br /> Only Sample no. B5-50 was reported to contain detectable concentrations of benzene, at <br /> 0.006 mg/kg. All other samples analyzed were reported to contain no detectable <br /> concentrations of benzene. <br />' All samples collected between 35 and 78 feet bgs which were submitted for analyses were <br /> reported to contain insignificant or low concentrations of toluene, ethylbenzene and total <br /> xylenes. <br /> The samples collected from Boring B5 and subnutted for chemical analyses were reported <br /> not to contain detectable concentrations of fuel oxygenates. <br /> The laboratory results are summarized in Table 2. Laboratory reports and chain-of-custody <br /> forms are included as Appendix C. <br /> 7 1981175-WFB.Stockton Ph.[I and Quart.Groundwater <br />