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C A M B R I A ANALYTICAL RESULTS Tank excavation, dispenser island, product piping, and vent line soil sample analytical results are summarized in Table 1 and presented on Figure 2. The certified analytical reports are presented in Appendix A. A summary of these data is presented below. UST Area: Initially, nine samples were collected at depths ranging from 14 to 17 fbg in the tank excavation. Four of these samples (T6-N-14', T6-S-17', T7-N-17', and T7-S-17') contained elevated petroleum hydrocarbon concentrations. These areas were over-excavated and resampled at 19 to 25 fbg. No TPHd, benzene, or MTBE were detected in any of these samples. TPHg was only detected in sample T7-N-24.5' at a concentration of 15.4 ppm. Discolored soil was observed at the bottom of the southeastern portion of the tank excavation near tank sample T6-S. This area was over-excavated to an approximate depth of 25 fbg and one soil sample (T6/7-S-20') was collected from the edge of the over- excavation between the diesel UST and the easternmost gasoline UST. This sample contained 4.92 ppm TPHg and 52.9 ppm TPHd. Benzene and MTBE were not detected. Former Dispenser Area: Initially, four samples were collected at depths ranging from 3 to 4 fbg beneath the former dispensers. These samples (DNE-3.5', DSE-4', DNW-3', and DSW-3') contained TPHg concentrations ranging from <1.00 to 35.7 ppm, TPHd concentrations ranging from 8.65 to 3,850 ppm, and MTBE concentrations ranging from <0.100 to 1.26 ppm. Benzene was not detected in any of the samples. Areas beneath three of the dispensers were over-excavated to approximate depths ranging from 7 to 8.5 fbg. These deeper samples did not contain detectable concentrations of TPHg, TPHd, or benzene. MTBE was only detected in sample DNW-8.5' at a concentration of 0.0158 ppm. Lateral over-excavation was performed near the southwestern dispenser island. One soil sample (DSW1-3') was collected at the edge of the over-excavation. It contained 23.7 ppm TPHd. TPHg, benzene, and MTBE were not detected. Product Piping: Initially, three samples (PLE1-5', PLE24', and PLWI-3.5') were collected below the former product piping alignment. These samples contained TPHd at concentrations ranging from <1.00 to 23.3 ppm and benzene concentrations ranging from <0.00500 to 0.0164 ppm. TPHg and MTBE were not detected in the samples. One of these areas was over-excavated (PLE2-8.5') and no TPHg, TPHd, benzene, or MTBE were detected at that depth. 241-1399 5