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25 July 1996 <br /> AGE-NC Project No. 95-0112 <br /> Page 3 of 3 <br /> 3. Decontaminate sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. <br /> 4. Collect soil samples at 5-foot intervals. Samples will be collected using 1.5-inch Geoprobe <br /> soil sampling assembly and four pre-cleaned brass sleeves. <br /> 5. Preserve soil in the second sleeve by covering both ends with Teflon sheets, capping and <br /> sealing with tape. <br /> 6. Label and log samples on a chain-of-custody form. <br /> 7. Store samples in a chilled container and transport to a State-certified laboratory for analysis. <br /> Selected soil samples will be analyzed for TPH-g, BTE&X and 1t4'TBE in accorLdance with <br /> EPA methods 8015m and 8020. Additional samples may also be submitted to a laboratory <br /> for geotechnical analysis. <br /> 8. Monitor soil sample duplicates for the presence of volatile organics rasing a photo-ionization <br /> detector (PID) pre-calibrated to isobutylene. <br /> 9. Log soil sample duplicates in accordance with the Unified Soil Classification System. <br /> 10. Backfill boring to surface grade using Portland Cement. <br /> 4.2. REPORT PREPARATION <br /> Details of the drilling and sampling procedures and results of laboratory analysis NN ill be included <br /> in a Quarterly Report or, if appropriate, a Closure Summary Report (CSR). The report will be in a <br /> format acceptable to the PHS-EHD and CVRWQCB. The report will be reviewed and signed by a <br /> California Registered Geologist. <br />