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'v A S S O C I A T E S I N C 8, 2000 to take depth to water measurements but the cotton seed stockpile was still obstructing well MWI Water level measurements were collected from wells MW2 through MW6 Approximately one-eighth inches of free product was measured in well MW2 with an oil water interface probe Water levels ranged from 7 70 to 12 06 feet below the tops of the well casing elevations, representing an average decrease in the water table elevation of approximately 1 83 feet since June 2000 The water level data were used to develop the groundwater elevation contour map (Figure 3) Assuming that horizontal isotropic conditions prevail, groundwater in the uppermost aquifer beneath the site flowed towards the southwest The average hydraulic gradient on September 8, 2000 was calculated to be 0 001 ft/ft or approximately 5 ft/mile A summary of groundwater monitoring data is presented in Table 1 ANALYTICAL RESULTS TPHd was detected above Iaboratory detection limits in the samples collected from wells MW3 and MW4 at concentrations of 120 parts per billion (ppb) and 1,800 ppb, respectively TPHg and xylenes were detected in the sample collected from well MW4 at concentrations of 250 ppb and 1 0 ppb, respectively The samples collected from wells MW5 and MW6 contained no detectable concentrations of TPHg, TPHd, BTEX, or MTBE A summary of analytical results is presented in Table 2 Laboratory data sheets and chain-of-custody documentation are contained in Attachment 2 CONCLUSIONS Concentrations from wells MW3 through MW6 remain generally consistent with the results from the previous sampling event with the exception of TPHd in well MW4, which has decreased from 13,000 to 1,800 ppb Free product was discovered in well MW2 during the sampling event The direction and magnitude of groundwater flow is consistent with the previous sampling event, and groundwater elevations have decreased since June 2000 w 1625Mquartlyl3gr-2000 doc- 3