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1 f <br /> Project No S8080-06-OIC <br /> August 31, 1994 <br />' between 18 and 32 5 feet bgs in boring GB-1 and at a concentration of 78 mg/Kg at a depth <br /> of 27 5 feet bgs in boring GB-3 TPHmo was reported at a concentration of 12 mg/Kg at a <br /> ' depth of 53 feet in boring GBA <br /> ' Benzene was not reported above the laboratory equipment detection limits for each soil <br /> ' sample tested Detectable concentrations of toluene, ethylbenzene and total xylenes were <br /> reported for soil samples obtained at depths between 22 5 and 42 5 feet bgs from borings G13- <br /> 1, GB-3 and G13-5 TPH and BTEX constituents were not reported above the laboratory <br /> ' equipment detection limits for soil samples analyzed from borings GB-2 and GB-4 <br /> DISCUSSION OF ANALYTICAL RESULTS <br /> ' The horizontal distribution of residual TPHg in soil identified is generally bounded to the <br /> northwest, west and south by borings GB-4, E13-7, EB-4, E13-6 and EB-9 The vertical <br /> ' distribution of the petroleum hydrocarbon soil impacts generally extends from depths between <br /> 15 and 45 feet bgs in the central and northern portions of the parking lot area TPHg and <br /> ' TPHd concentrations were not detected within 20 feet of the current groundwater surface with <br /> ' the exception of 2,800 mg/Kg TPHg reported at a depth of 42 5 feet in boring GB-5 <br /> 1 <br /> - 30 - <br />