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19 September 1995 <br /> AGE-NC Project No. 950183 <br /> Page 3 of 4 <br /> sample chain of custody documents will be presented in a report with the findings and <br /> recommendations. <br /> 4.0. PROCEDURES <br /> 4.1. COLLECTION OF SOIL SAMPLES <br /> For the collection of soil 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 five probings, using van-mounted, 1.125-inch diameter probe rods to depths of <br /> approximately 25 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) Continuously sample each probing, beginning at 3 feet, using a Geoprobe soil sampler <br /> 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 TPH-g, volatile aromatics (BTE&X), and total lead <br /> in accordance with the appropriate EPA methods. <br /> 10) Backfill each probing using a concrete-bentonite slurry in the entire depth of the probing. <br />