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24 July 1997 <br /> AGE-NC Project No. 97-0349 <br /> Page 4 of 4 <br /> 2. Initially,advance one(1)soil probe boring at the site to a depth of approximately 50 feet bsg. <br /> If petroleum hydrocarbon-impacted soil is encountered during probing activities, probe <br /> borings may be advanced to greater depths in an attempt to determine the extent impacted <br /> soil. <br /> 3. Probe borings will using a van-mounted Geoprobe probing unit equipped with 1.125-inch <br /> diameter rods. Proposed probe boring location is depicted on Figure 2. <br /> 4. Decontaminate sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. <br /> 5. Obtain soil samples at five foot intervals using a Geoprobe soil sampling assembly pre- <br /> loaded with four 1.125-inch by 6-inch brass sleeves. <br /> 6. Preserve soil samples in the second brass sleeve by covering both ends with Teflon sheets, <br /> capping,and sealing with tape. Each sample will be labeled with the following: site location, <br /> sample identification, depth, time and date. <br /> 7. Document 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 /> 9. Monitor soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector(FID)pre-calibrated to isobutylene. <br /> 10. Log soil sample duplicates in accordance with the Unified Soil Classification System. <br /> 11. Backfill each probe boring to surface grade using Portland type II cement. <br /> 12. Selected soil samples will be analyzed by a State-certified laboratory for TPH-g, BTE&X <br /> and MTBE in accordance with EPA methods 8015m, 8020 and 8260B, respectively. <br /> 4.2. REPORT PREPARATION <br /> Upon completion .of probing, sampling and laboratory analysis, a report will be prepared <br /> surnrnarizing 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 CVRWQCB and will be reviewed and signed by a California Registered Geologist. <br /> Advanced GeoEnvironntentar,Inc. <br />