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19 September 1995 <br /> AGE-NC Project No. 94-0140 <br /> Page 2 of 3 <br /> collected at five-foot intervals. One "grab" ground water sample will be collected from each <br /> penetration. <br /> Five soil and five ground water samples will be analyzed by a State-certified laboratory for total <br /> petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d), volatile aromatics <br /> (benzene, toluene, ethyl benzene and xylenes: BTE&X), chlorinated pesticides and halogenated <br /> volatile organic compounds (HVOCs)in accordance with the appropriate EPA methods. <br /> Upon completion of the investigation, a report will be submitted to the PHS-EHD. The reportwill <br /> describe probing and sampling procedures and will included recommendations for additional <br /> investigation, if necessary. <br /> PROCEDURES <br /> For the collection of soil and ground water samples, the following procedures will be performed: <br /> 1) Notify the San Joaquin County Environmental Public Health Services -Environmental Health <br /> Division(PHS-EHD) 48 hours prior to commencement of any work. <br /> 2) Install three probings, using van-mounted, 1.125-inch diameter probe rods to depths of <br /> approximately 10 feet. The boring (probing) locations are depicted on Figure 2. <br /> 3) Decontaminate sampling equipment in an alconox solution and rinse twice with water prior <br /> to each sampling run. <br /> 4) Obtain discrete soil samples at five-foot intervals using Geoprobe soil sampler assembly <br /> loaded with pre-cleaned 1.125-inch by 6-inch brass sleeves. <br /> 5) Preserve soil in the lead brass sleeve by covering both ends with aluminum foil, capping, and <br /> sealing with tape. <br /> 6) Store the samples under ice and transport the samples in a chilled container to a State certified <br /> laboratory for analysis. <br /> 7) Screen soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector(PID) pre-calibrated to isobutylene. <br /> 9) Collect one ground water sample from each probing. The sample will be collected using a <br /> Geoprobe water sampling assembly. <br />