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TPH as gasoline was detected ;n five of the fourteen soil samples submitted for analysis Concentrations of TPH ranged from 2 ppm (P-5, 16-foot depth) to 356 ppm (P-3, 46-foot depth) No benzene was detected in any of the soil samples analyzed Toluene and ethylbenzene ' were detected at low concentrations in only two samples Xylenes were detected in only five of the fourteen samples Analytical results of soil samples are summarized in Table 4 Also included in Table 4 are the analytical results of soil samples from the remediation wells ' (installed in 1993) and P-1 and P-2 (from the pilot study) The laboratory report and chain- of-custody are included in Appendix F ' Selected soil samples were also analyzed for nitrate, nitrite, phosphate and pH No nitrites or nitrates were detected in any of the sample analyzed Phosphates were detected in four samples at concentrations ranging from 14 ppm to 2 2 ppm Five samples were analyzed ' for pH, pH was reported between 8 2 and 8 5 in each sample The analytical results of the soil samples are summarized in Table 5 The laboratory report and chain-of-custody are included in Appendix G ' 4.5 Groundwater Gradient and Direction ' The depth to first groundwater in the area of the site ranges from 58 feet at the north end of the site to nearly 61 feet southwest of the site The data indicates an increase in elevation of appioximateIy 2 feet since September 1994, re-,erszng the trend observed between June and September 1994 The increase in elevation is uniform throughout the site area and is consistent with seasonal fluctuations in groundwater elevations Figure 4 is a ' gi oundwater gradient map, based upon the data collected on December 19, 1994 Groundwater flow in the vicinity of the site is soutli-southA est as in previous monitoring events, the gradient steepens towards the south end of the site ' 46 Petroleum Hydrocarbon Impacted Groundwater Samples were collected and analyzed from MW-14 and EW-1 three times during the last ' quarter of 1994 (October 17, December 7 and December 19, 1994) A fourth set of samples were collected in November, however, the samples were broken in transit to the laboratory ' Water samples were also collected from MW-12 on October 17 and December 19 all other wells were sampled only on December 19, 1994 I Petroleum hydrocarbons were detected in groundwater fzoim eight of the ten wells sampled TPH ranged from non-detect (MW-11/12-19-94) to 5,400 ppb (MW-14/12-7-94) Detectable BTE&X concentrations ranged from 0 57 ppb (benzene, MW-I1) to 320 ppb (xylenes, MW- 14) As in pievious samples, no TPH or BTE&X were detected in samples fiom MW-12 and MW-13 However, very low concentrations of toluene and xylenes (0 86 ppb and 10 ppb) were detected in a sample from MW-12 collected on October 17, 1994 The analytical results are summarized in Table 6 The laboiatory results and chain-of-custody are included Geak8�l AudiSen Kea [nc Q..-,IY R-F-02 4411 31 oElxQM6 7