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a , <br /> I <br /> 03 January 1996 <br /> AGE-NC Project No. 95-0197 <br /> Page 4 of 4 <br /> 2. Boring locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA) check of underground utilities or pipes <br /> 3. Advance six'�I(6) to eight (8) soil probings, using a van-mounted Geoprobe probing unit <br /> equipped with 1.125-inch diameter probe rods. Probings will be advanced to maximum <br /> depths of 35 feet. Probing locations are depicted on Figure 2. r <br /> 4. Decontaminate sampling equipment in an Alconox solution and rinse twice with water prior <br /> to each sampling run. <br /> 5. Obtain discrete soil samples at five-foot intervals beginning at 15 feet bsg, using a Geoprobe <br /> soil sampler,assembly loaded with pre-cleaned 1.125-inch by 6-inch brass sleeves. <br /> 1 <br /> 6. Preserve soil in the second brass sleeve by covering both ends with aluminum foil or'Teflon <br /> sheets, capping,"and sealing with tape. <br /> I <br /> 7. Store the samples under ice and transport the samples in a chilled container to a State- <br /> certified laboratory for analysis. <br /> 8. Screen soil sample duplicates for the presence of volatile organics using a photo-ionization I. <br /> detector(PID) pre-calibrated to isobutylene. <br /> 9. Log borings.in accordance with the Unified Soil Classification System. <br /> 10. If ground water is encountered, collect grab ground water samples from selected probings. <br /> Samples will be collected using a Geoprobe water sampling assembly. Water samples'will'be <br /> collected in 40-m1 VOA vials and 1-liter amber bottles. <br /> 11. Ground water samples will be stored,under,ice and transported in a chilled container to a <br /> State-certified laboratory for.analysis. <br /> 12. Selected soil and ground water samples will be analyzed for TPH-g, TPH-d and BTE&X in <br /> accordance with the appropriate methods. <br /> } <br /> 13. Upon completion, each probing will be backfilled with Portland cement. <br /> 3 <br /> I <br /> 4.2. REPORTING <br /> Upon completion of field work and laboratory analysis, a detailed report will be prepared <br /> summarizing procedures and results of the investigation. If appropriate, the report will be a { <br /> Preliminary Investigation and Evaluation Report (PIER). The report will include recommendations <br /> for further investigation at the site, if necessary. The report will be reviewed and signed by a <br /> California Registered Geologist. ' <br /> f <br /> i <br /> i <br />