Laserfiche WebLink
• 4.0 FINDINGS <br /> 4.1 Stratigraphy <br /> In each boring (B-1 through B-10) backfill nnateiial was encountered from surface grade to <br /> a depth of approximately 5 feet Fine-grained sands were encountered from depths of 5 to <br /> 10 feet Fine- to medium-grained, loose sands were encouiiteied from depths of 10 to 15 <br /> feet Wet, coarse-grained sands were encountered from depths of 15 to 20 feet Fine- <br /> grained, clayey sands were encountered at depths of 20 feet B-1, B-2 and B-3 terminated <br /> in medium-grained sands with clay at deptlis of approximately 25 feet Groundwater was <br /> encountered in each boring at a approximately 15 feet Boling logs are included in Appendix <br /> A <br /> 4.2 Field Screening of Soil Saurples and Auger Returns <br /> In boring B-1, hydrocarbon odors were detected rn soil samples at 5, 10 and 15 feet <br /> I-Iydiocaiborr odors were detected throughout borings B-2, B-3 and B-8 Li boring B-4, light <br /> lrydrocarborr odors were noted only at a depth of 10 feet In boring B-5, hydrocarbon odors <br /> were detected between depth of 5 and 10 feet Iii boring B-9, hydiocaibon odors were <br /> detected at 10 feet No hydrocarbon odors were detected in boiings B-6, B-7 or B-10 <br /> 4.3 Analytical Results of Soil Samples <br /> A total of twenty-one soil samples were analyzed by WEST All samples were analyzed for <br /> TPH as gasoline, TPH as diesel, TPH as motor oil and BTE&X TPH as gasoline was <br /> detected at concentrations to 1,400 pprn (1W) TPH as diesel was detected at concentrations <br /> to 18,000 ppm (IW) Benzene, toluene, etliylbenzene and xylene were detected at levels up <br /> to 2 5 ppnr (138-15), 4 4 ppni (138-15), 2 4 ppm (138-15) and 8 3 ppm (IW), respectively No <br /> TPH as motor oil was detected in any of the soil samples The analytical results of the soil <br /> samples are summa>>zed in Table 1 <br /> TPH as gasoline and diesel were only detected in the sample from B-1, B-8 and the three <br /> hand auger borings No BTE&X was detected in B-4, B-6, B-7 and B-10. <br /> Ten soil samples (one from each boring) were analyzed for total lead. No lead was detected <br /> in any of the soil samples The laboratory results and chaln-of-custody are included rn <br /> Appendix B <br /> 4.4 Analytical Results of Groundwater Samples <br /> TPH as gasoline was detected in groundwater samples froin B-2, B-4, B-5, B-8 and B-9 at <br /> concentrations of 13,000µg/L (parts per billion, ppb), 2,200 ppb, 330 ppb, 3,400 ppb and 360 <br /> ppb, respectively TPH as diesel was detected only in B-2 at a concentration of 2,500 ppb, <br /> TPH as motor oil was detected only rn B-4 at 110 ppb. <br /> o.aeyc.i w.du s<rv�. I.t 6 <br /> P..k.Sad M.n P{HRRMUT1 L 1993 <br />