Laserfiche WebLink
29 April 2004 <br /> i AGE-NC Project No 98-0511 <br /> Page 4 of 7 <br /> 2 2 2 Collection and Analysis of Ground Water Samples <br /> Water samples were collected from each purged well using a new, dedicated disposable plastic <br /> bailer Each water sample was transferred into laboratory-supplied 40-m1 VOA vials containing 0 5 <br /> ml 18% hydrochloric acid as a sample preservative <br /> After collection,the samples were properly labeled,placed in a chilled container,transported under <br /> chain-of-custody to CTEL, a California Department of Health Services (DHS)-certified laboratory, <br /> and were analyzed for <br /> • TPH-g in accordance with EPA Method 8015M, <br /> • BTEX in accordance with EPA Method 826013, and <br /> • DIPE, ETBE, MTBE, TAME, TBA, EDB and 1,2-DCA in accordance with EPA Method <br /> 8260B <br /> I3.0. FINDINGS <br /> E • Soil characteristics, ground water elevation and flow direction were determined from field data <br /> Hydrocarbon-impact to soil and ground water was inferred from laboratory analysis of ground water <br /> samples <br /> 31 STRATIGRAPHY <br /> In general, moderate yellowish brown and light olive gray clayey to sandy silt was encountered at <br /> 5 feet, 15 feet and 30 feet bsg Light olive gray and moderate yellowish brown silty to fat clay was <br /> encountered at depths of approximately 18 feet, 20 feet, 23 feet,25 feet and 35 feet bsg Light olive <br /> brown and moderate yellowish brown fine to medium poorly graded sand was recovered from <br /> approximately 10 feet, 19 feet,24 feet and 29 feet bsg The boring log recorded during advancement <br /> of probe boring P-lis included in Appendix B Geologic cross section A-A' was generated from <br /> boring log data and depicts general lithology beneath the site in cross sectional view (Figure 3) <br /> 32 ANALYTICAL RESULTS OF SOIL SAMPLES <br />' Three soil samples P 1-20,P 1-30 and P 1-35 were analyzed for the constituents resented in Section <br /> p � ) Y p <br /> 2 1 4 TPH-g and ethylbenzene were detected in sample P1-20 at concentrations of 410 milligrams <br /> per kilogram(mg/kg)and 2 7 mg/kg,respectively Total xylenes were detected in soil samples P 1-20 <br /> and P1-35 at concentrations of 16 6 mg/kg and 0 018 mg/kg, respectively No other analytes of <br /> IAdvanced Geolnvironcnental,Inc <br />