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0 <br /> SamplingRepwtforRe,noval ofHydnaulic Oil Tank—P.G.&E.,Stockton,CA June,2004 <br /> ANALYTICAL RESULTS <br /> The laboratory analyses for the soil samples were performed by McCampbell Analytical in Pacheco, <br /> California. The samples were accompanied by properly executed Chain of Custody documentation. All <br /> of the samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline and benzene, <br /> toluene, ethylbenzene, and xylenes (BTEX) and MTBE by EPA Method 8020 and 8015 - Modified, <br /> and TPH as diesel by EPA Method 8015—Modified. <br /> The analytical results for all of the samples were non-detectable for these analytes, except for in the <br /> composite soil sample from the stockpile of excavated soils, in which TPH as diesel was detected at a <br /> concentration of 9.9 parts per milion (ppm). The analytical data is summarized on Table 1. Copies of <br /> the laboratory data sheets and the chain of custody are attached to this report. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Based on the predominantly non-detectable results of the samples, no further work related to the <br /> hydraulic oil tank removal is considered warranted. <br /> DISTRIBUTION <br /> A copy of this report should be sent to the San Joaquin County Environmental Health Department. <br /> LIIy1ITATIONS <br /> Soil deposits and rock formations may vary in thickness, lithology, saturation, strength and other <br /> properties across any site. In addition, environmental changes, either naturally-occurring or artificially- <br /> induced, may cause changes in the extent and concentration of any contaminants. Our studies assume <br /> that the field and laboratory data are reasonably representative of the site as a whole, and assume that <br /> subsurface conditions are reasonably conducive to interpolation and extrapolation. <br /> The results of this study are based on the data obtained from the field and laboratory analyses obtained <br /> from a state certified laboratory. We have analyzed this data using what we believe to be currently <br /> applicable engineering techniques and principles in the Northern California region. We make no <br /> warranty, either expressed or implied, regarding the above, including laboratory analyses, except that <br /> our services have been performed in accordance with generally accepted professional principles and <br /> practices existing for such work. <br /> 3 <br />