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W <br /> M TreadweII&P19 b <br /> detected above laboratory reporting limits with the exception of low level concentrations from SB-7 at <br /> 53 feet and 76 feet bgs. Measured TPH-g concentrations were 1 . 1 mg/kg at 53 feet and 1 .6 mg/kg at <br /> 76 feet bgs. <br /> TPH-k was generally detected in samples where TPH-g was detected but at significantly less magnitudes <br /> in concentration. The highest concentration of TPH-k was reported in SB-2 at 440 mg/kg at 21 . 5 feet <br /> bgs.t The remaining TPH-k concentrations ranged from below detection limits to 310 mg/kg in SB-2 <br /> at 3 .5 feet bgs. <br /> 7 <br /> BTEX compounds were generally not detected above laboratory reporting limits with a few exceptions. <br /> i" <br /> Benzene and toluene were detected in SB-7 at 76 feet bgs at concentrations of 0 . 11 and 0.071 mg/kg, i <br /> respectively. Ethylbenzene was detected at concentrations ranging between 0.032 mg/kg in SB-7 at <br /> 1 <br /> 76 feet to 48 mg/kg in SB-3 at 59.5 feet bgs Xylenes were detected in three samples at concentrations <br /> ranging between 0.018 mg/kg in SB7 at 76 feet bgs to 90 mg/kg in SB-3 at 59.5 feet bgs. <br /> MTBE was not detected in any soil samples above laboratory reporting limits. i <br /> 5 . 3 . 1. 2 Test Pits ' J)'Ije1 <br /> On 17 November 2004, three test pits (TPA, TPB, and TPC) were excavated and sampled (Figure 2). <br /> TPA was in the location of the former pump island. TPB and TPC were located in the vicinities of the fuel <br /> distribution lines. Samples were ccollected at all three test pits from depths of 2.0, 6. 5 and 10 feet bgs. <br /> TPH-g, BTEX compounds] nd MTBE cited <br /> below the laboratory reporting limits in all samples. The <br /> 2.0-foot bgs sample from TPA had a low level detection of 1. 2 mg/kg for TPH-k. Otherwise, all samples <br /> were below the laboratory reporting limits for TPH-k. Lead concentrations were greatest at the 2 .0-foot <br /> depth and generally decreased with depth (Table 1). At 2 feet bgs, lead concentrations were 260 mg/kg, % <br /> 7.5 mg/kg, and 23 mg/kg at TPA, TPB, and TPC, respectively. At 6.5 feet bgs, lead concentrations were <br /> 25 mg/kg, 3.5 mg/kg, and 4.6 mg/kg at TPA, TPB, and TPC, respectively. At 10 feet bgs, lead <br /> concentrations were 4. 1 mg/kg, 4.3 mg/kg, and 6.7 mg/kg at TPA, TPB, and TPC, respectively. <br /> 5.3. 2 Groundwater Results <br /> Results of the investigation indicate that there are two distinct water bearing zones at the Site. <br /> Therefore, discussions of the groundwater results are separated into shallow and deep zones. <br /> 8 <br /> 25971201 . DGD 6 February 2008 <br />