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16 January 1997 <br /> AGE-NC Project No 97-0290 <br /> Page 3 of 5 <br /> will be analyzed for total petroleum hydrocarbons quantified as gasoline (TPH-g), volatile aromatics <br /> (benzene, toluene, ethylbenzene and xylenes BTE&X) and methyl tertiary butyl ether (MTBE) <br /> Selected samples may also be analyzed for TPH as motor oil, if necessary All samples will be <br /> analyzed in accordance with the appropriate EPA method(s) The laboratory report,testing methods, <br /> laboratory quality assurance/quality control (QA/QC) reports and sample chain-of-custody <br /> documentation will be presented in a report with the findings and recommendations <br /> 4.0. PROCEDURES <br /> 4 1 DRILLING AND SAMPLING <br /> The following procedures will be performed for the drilling and installation of soil borings and <br /> ground water monitoring wells <br /> 1 Notify the PHS-EHD 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits <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 soil borings using a truck-mounted drill rig and 8 25-inch diameter hollow sterni <br /> augers Boring will be advanced to depths of approximately 65 feet bsg Boring locations <br /> will be approved by the PHS-EHD prior to drilling <br /> 4 Decontaminate all sampling equipment in an alconox solution and rinse twice with water <br /> prior to each sampling run Steam-clean auger flights before advancement of each boring <br /> 5 Sample soil from each boring, beginning at five feet bsg, utilizing a California split-spoon <br /> sampler and pre-cleaned 2-inch by 6-inch brass sleeves or using a split barrel continuous core <br /> sampler <br /> 6 Preserve soil in the brass sleeve by covering both ends with Teflon sheets, capping, and <br /> sealing with tape <br /> 7 Store the samples under ice and transport the samples in a chilled ice chest to a State- <br /> certified laboratory for analysis <br /> 8 Screen soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector (PID) pre-calibrated to isobutylene <br /> 9 Log borings in accordance with the Unified Soil Classification System <br /> 10 Selected soil samples will be analyzed for TPH-g, BTE&X and MTBE in accordance with <br />