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' Idletivild Market - O.E.S. <br /> June 21, 1993 <br /> -8- <br /> Page -8- <br /> depth of approximately 11 feet below the ground surface. No <br /> petroleum staining or odors were noted on the remaining sidewalls <br /> or floor of Pit 1 or Pit 2 . No TPH-G, BTEX, EDB or total lead <br />' were detected in the remaining soil samples collected from Pit 1 <br /> or Pit 2 . <br /> 1, <br /> Based upon the field observations and laboratory results, <br />' Condor recommends that at least 3 to 5 feet of soil be removed <br />' from the north sidewall of Pit 1. Due to the proximity of the <br /> pump island and concrete driveway, removal of the existing <br /> surface structures will probably need to be done prior to the <br /> over-excavation. Visual inspection for evidence of soil staining <br /> and field screening using an organic vapor analyzer - OVA should <br />' be conducted during the excavation to assist in evaluating the <br /> extent of the contaminated soil . Following the excavation, <br />' verification soil samples should be collected as required by the <br /> San Joaquin County Environmental Health Department. The samples <br />' should be analyzed for TPH--G and BTEX. Disposal options for the <br /> excavated soil (e.g. , air stripping, bioremediation, land <br /> disposal, etc. ) should be investigated. <br /> No additional work is warranted at Pit 2 . The former <br /> location of the 50 gallon tank (T4/Pit 2 ) should be backfilled <br /> ICONDOR <br />