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6 June 1995 <br /> AGE-NC-95-0146 <br /> Page 2 of 3 <br /> 4.0. PROCEDURES <br /> 4.1. COLLECTION OF SOIL SAMPLES <br /> To complete the scope of work, 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 two probings, using van-mounted, 1.125-inch diameter probe rods to depths of <br /> approximately 10 feet. The boring 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, starting at 10 feet, using Geoprobe soil <br /> sampler assembly 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 /> 8) Log borings in accordance with the Unified Soil Classification System. <br /> 9) Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as diesel <br /> (TPH-d)and volatile aromatics(BTE&X) in accordance with the EPA methods 5030/8015 <br /> and 8020, respectively. <br /> 10) Backfill each probing using a concrete-bentonite slurry in the entire depth of the probing. <br /> 4.2. REPORTING <br /> A brief report detailing the results of the work will be prepared. The report will be reviewed and <br /> signed by a California Registered Geologist. The report will be submitted to Lifetile for review. <br />