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30 September 1999 <br /> AGE-NC Project No. 99-0646 <br /> Page 3 of 3 <br /> 2. <br /> 3. Decontaminate sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. <br /> 4. Obtain soil samples at 5-foot depth intervals during probing installation,beginning at a depth <br /> of 5 feet bsg. Samples will be collected using a Geoprobe soil sampling assembly pre-loaded <br /> with four 1.125-inch by 6-inch brass sleeves. <br /> 5. Preserve soil samples in the second brass sleeve by covering both ends with Teflon sheets, <br /> capping, and sealing with tape. <br /> 6. Label samples with date,location,boring number and depth,time of sampling,and sampler's <br /> initials. <br /> 7. Log samples on a chain-of-custody form and store samples in a chilled container pending <br /> transport to a state-certified laboratory. <br /> 8. Monitor soil sample duplicates for the presence of volatile organic compounds using an <br /> organic vapor meter equipped with a photo-ionization detector (PID) pre-calibrated to <br /> isobutylene. <br /> 9. Log soil sample duplicates in accordance with the Unified Soil Classification System. <br /> 10. If groung water is encountered, collect grab water samples from selected probings using a <br /> Geoprobe water sampling assembly by advancing the ground water sampling assembly <br /> through the ground water interface and retracting the casing to expose 4 feet of screened <br /> PVC casing. Water will be retrieved using a positive displacement sample tubing and ball <br /> bearing assembly. The ground water samples will be collected into 40-m1 VOA vials. <br /> 11. Label sample vials with location, probe number, date and time of sampling, and sampler's <br /> initials. <br /> 12. Store the labeled samples in a chilled container and transport to a state-certified laboratory. <br /> 13. Analyze selected samples for TPH-g and BTEX in accordance with EPA methods <br /> 8015m/5030 and 8020/602, respectively. <br /> 14. Backfill each probing to surface grade using portland cement. <br /> 4.2. REPORT PREPARATION <br /> Upon completion of probing, sampling and laboratory analyses, a brief report will be prepared <br /> summarizing results of the work performed. The report will include recommendations for additional <br /> investigation or remediation, if necessary. The report will be in a format acceptable to the PHS-EHD <br /> and will be reviewed and signed by a California Registered Geologist. <br /> Advanced GeoEnvironmental,Inc. <br />