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SOIL VAPOR EXTRACTION PILOT STUDY REPORT San Joaquin County <br /> Montgomery Ward Auto Service Center Public Health Services Department <br /> 5400 Pacific Avenue Stockton CA Site Code 2163 <br /> PROBE DISTANCE (FT) DISTANCE (FT) <br /> NUMBER FROM VEW-2 FROM VEW-2B DEPTH (FT) <br />' SP-1A 101 99 20 <br /> SP-1B 103 101 35 <br />' SP-2 79 77 25 <br /> SP-3 126 124 25 <br /> SP-4 93 92 25 <br /> SP-5 20 24 25 <br />' SP-6 43 40 25 <br /> SP-7A 32 30 20 <br /> SP-7B 33 30 35 <br /> SP-8 60 60 35 <br /> Standard operating procedures for well and soil probe construction procedures are Included in <br />' Appendix H <br /> 5 2 Installation Of Fuel And Utility Services <br /> A diesel powered generator was used to supply electrical power to the VES and the air <br /> sparging units The use Of the generator ensured that the pilot test operations did not interfere <br /> with the operations of the Ward Auto Service Center <br /> 6.0 SOIL CHARACTERIZATION <br /> This section presents the analytical results of soil samples that were obtained as part of this <br /> pilot study to help delineate the extent of contamination This section also presents the extent <br /> of contamination Interpreted from all the data collected to date <br /> A total of thirty-two soil samples were collected during the drilling of the extraction wells and <br /> vapor probes The locations of these soil samples are listed below <br /> ■ Soil samples at 50, 55, 60 and 65 feet bgs at VEW-1B, <br /> ■ Soil samples at 15, 20 and 25 feet bgs at SP-3 and SP-6, <br /> ■ Soil samples at 15 and 25 feet bgs at SP-4 and SP-5, <br /> Soil samples at 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 & 65 feet bgs at SP-7B, and <br /> ■ Soil samples at 8, 20, 25, 30, 35, 40, & 45 feet bgs at SP-8 <br /> Boring logs for these locations (VEW-1B, VEW-2B, SP-3, SP-4, SP-5, SP-6 and SP-7B) are <br /> included in Appendix I (other wells and probes were not logged) The soil samples were <br /> tested for total petroleum hydrocarbons as gasoline (TPH-G) by modified EPA Method 8015, <br /> and benzene, toluene, ethylbenzene and xylenes (BTEX) and methyl tertiary butyl ether <br /> (MTBE) by EPA Method 8020 Since no MTBE was detected by Method 8020, duplicate <br /> Project No 1232 - 7 - ENVIRONMENTAL AUDIT, INC <br />