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RAF <br /> -, <br /> IW10 <br /> Chevr)n U.S.A, <br /> Page J <br /> Task III accomplished during this study involved laboratory chemical analysis of <br /> the soil and gr-undwater samples obtained during Task 11. The following analytica! <br /> methodologies were selected for this investigation. Please refer to Appendix B of <br /> this report, which describes the Methodologies used in the field investigation. <br /> Soil Analysis: <br /> r, Total Petroleum Hydrocarbons as Gasoline; <br /> DOHS LUFT Method <br /> o Purgeable Aromatics; <br /> EPA Method 8020 <br /> GroundwateL6nA1y [ <br /> o Total Petroleum Hydrocarbons as Gasoline; <br /> r EPA Method 8015 <br /> ` <br /> o Volatile Organics;y EPA Method 624 <br /> „i 6.0 GEOLOGIC AND HYDROLOGIC SETTINGS <br /> The geologic setting of the site was developed by conducting a review of <br /> publications from the United States Geologic Survey and the California Division of <br /> Mines and Geology. Following is a general discussion of the geologic hydrologic <br /> setting of the site area. <br /> 6.1 Geologic Setting <br /> The subject property is located in the San Joaquin Valley near the center of the <br /> w Greater Central Valley. The Central Valley of California,a large asymmetric <br /> northwest trending structural trough, is bordered on the east by the Sierra Nevada. <br /> The Sierra Nevadas are a southwest dipping fault block composed of granitic, <br /> 16000-206-044 _ <br /> R\. 1 \lc�iEcr: <br />