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k <br /> Evaluation of Contamination January 3, 1989 <br /> ` Former Texaco Service Station, Manteca, Califorij a AGS 38053-1 <br /> r� <br /> ANALYTICAL METHODS AND RESULTS <br /> Soil Sample <br /> The soil sample showing the highest OVA reading (from 11 feet in <br /> borine B-1) and the soil samples from directly above the ground- <br /> water surface in each boring were selected for chenical analyses. <br /> The samples were analyzed for total petroleum hydrocarbons (TPH) <br /> as gasoline using modified Environmental Protection Agency (EPA) <br /> Method 8015 and the aromatic hydrocarbon constituents benzene, <br /> toluene, ethylbenzene, and total xylene isomers (BTEX) by EPA <br /> FaI Method 8020. The samples were analyzed at Applied GeoSystems' <br /> laboratory in Fremont, California. In addition, National <br /> Environmental Testing, Irc. , analyzed the soil sample from <br /> f directly above the ground-water surface in soil boring B-3 for <br /> organic lead. Both laboratories are certified by the state of <br /> California to perform the requested analyses. <br /> The results of the soil sample analyses are summarized in Table 1 <br /> and indicate that the levels of TPH are below detection limits in <br /> all samples analyzed, with the exception of the soil samples from <br /> --- ---------- -- ---- - . .e-s. o f <br /> — pptoxitnate-depths-of-ll-and-21--feet--in-.boring-B- --..--.COPi <br /> ---------------. _-- - --.-__-- <br /> the laboratory analytical reports are included in the Appendix to <br /> this report. <br /> 12 <br /> /:ad 49eoSystsIns - <br />