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26 June 1998 <br /> AGE-NC-98-0452 <br /> Page 3 of 5 <br /> • volatile aromatics (benzene, toluene, ethylbenzene, and xylenes: BTE&X) accordance with <br /> EPA Method 80201602 ' <br /> Laboratory reports, testing methods, laboratory quality assurance/quality control (QA/QC) reports, <br /> and sample chain-of-custody documentation will be presented in a report with the findings and <br /> recommendations. <br /> 4.0. PROCEDURES <br /> 4.1. DRILLING AND SAMPLING <br /> The following procedures will be performed for the installation of ground water monitoring wells: <br /> 1. Notify the PHS-EHD at least 48 hours prior to commencement of any work. <br /> 2. Mark boring locations at least 48 hours in advance for an Underground Service Alert (USA) <br /> check of underground utilities or pipes. <br /> 3. Advance three soil borings utilizing a truck-mounted drill rig and 8-inch diameter hollow <br /> stem augers to total depths of 20 feet bsg. Proposed boring locations are depicted on Figure <br /> 2. Borings may be advanced to greater depth, if necessary to define the vertical extent of <br /> impacted soil and ground water. <br /> 4. Decontaminate all sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. Steam-clean auger flights before advancement of each boring. <br /> 5. Collect soil samples at 5-foot intervals in each boring, beginning at a depth of 5 feet bsg. <br /> Samples will be collected using a California split-spoon sampler loaded with three 2-inch by <br /> 6-inch brass sleeves. The sampler will be driven by dropping a 140-pound weight from a <br /> height of 30 inches. The number of blow required to advance the sampler in 6-inch <br /> increments will be recorded on the boring log. <br /> 6. Preserve soil in the lead sleeve by covering both ends with Teflon sheets, capping, and <br /> sealing with tape. <br /> 7. Label and log samples on a chain-of-custody form. <br /> 8. Store samples in a chilled container and transport to a state-certified laboratory for analysis. <br /> Selected soil samples will be analyzed for total petroleum hydroclarbons quantified as diesel <br /> (TPH-d) and for volatile aromatics (benzene, toluene, ethylbenzene and xylenes; BTE&X) <br /> in accordance with the EPA Methods 8015m and 8020. <br /> Advanced GcoEnviranmenlal,Inc. <br />