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.0 <br /> r J5= <br /> i <br /> water from infiltrating into the well. The well head is protected with a <br /> locking well plug beneath an at-grade, traffic-rated well box. Well <br /> construction details are shown on the boring logs in Appendix D. <br /> 5 Soil Sample naly-sh <br /> r The soil samples collected from 5-feet bgs in borings- EW-1, AS-1, VE-1 a n d <br /> VE-2 were analyzed by Kiff for TPH-G, BTEX, and the fuel oxygenates MTBE, <br /> D1PE, ETBE, TAME and TBA by EPA Method 8260. These samples were <br /> selected since they were collected from the capillary zone. These analyses <br /> were performed to provide pre-remediation baselines for these locations. <br /> The analytical results are tabulated in Table Two. The certified analytical <br /> report and chain of custody are presented in Appendix F. <br /> The soil sample collected from boring EW-1 contained 850 ppm TPH-G, <br /> 2.8 ppm benzene, 22 ppm toluene, 15 ppm ethylbenzene, 80 ppm total <br /> IE xylenes, and 2.6 ppm MTBE. The soil sample collected from boring AS-1 <br /> contained 3,400 ppm TPH-G. 11 ppm benzene, 88 ppm toluene, 68 p p m <br /> ethylbenzene, 350 ppm total xylenes, and 1.9 ppm MTBE. The soil sample <br /> collected from boring VE-1 contained 480 ppm TPH-G, 0.32• ppm benzene, <br /> 0.11 ppm toluene, 7.8 ppm ethylbenzene, 8.0 ppm total xylenes, 1.1 p p m <br /> MTBE, and 0.49 ppm TBA. The soil sample collected from boring VE-2 <br /> contained 140 ppm TPH-G, 0.034 ppm benzene, 0.067 ppm ethylbenzene, <br /> I 0.56 ppm MTBE, and 0.49 ppm TBA. <br /> 7 . 0 GROUNDWATER ELEVATIONS <br /> The top of casing elevation, ground surface elevation and horizontal <br /> location of each well was surveyed by Farley Surveying of Stockton, <br /> California on December 10, 2001.. A copy of the survey is included as <br /> Appendix H. Depth to groundwater measurements are presented in Table <br /> Four. A groundwater velevation (potentiometric surface) contour map <br /> prior to the constant rate e .pump test on November 1, 2001 isp resented as <br /> Figure 2 in the pump test report in Appendix 1. On November 1 , 2001 , <br /> groundwater appeared to flow to the northwest beneath the site at a <br /> gradient of 0.0105. <br /> 8 . 0 FEASIBILITY TESTS <br /> Feasibility tests included a step drawdown pumping test, constant rate <br /> —� pumping test, air sparging test and a vapor extraction test. <br /> 574 West Grant. Line Road CAP - January 2002 <br /> -12- <br />