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TABLE 3 <br /> DISCHARGE PIT ANALYTICAL RESULTS <br /> --------------------------- ------- <br /> SAMPLE (PPM- (All BTXE values in PPB) <br /> ID LOCATION TPH BENZENE TOLUENE XYLENE ETHYLBENZNE <br /> P-1 -2 Boring 1 @ 2 ' ND ND ND ND ND <br /> P-1-6 Boring 1 @ 6 ' ND ND ND ND ND <br /> P-1 -10 Boring 1 @ 10 ' ND ND ND ND ND <br /> P-2-2 Boring 2 @ 2 ' ND ND ND ND ND <br /> P-2-7 Boring 2 @ 7 ' ND ND ND ND ND <br /> P-2-10 Boring 2 @ 10 ' 4360 ND 38 442 120 <br /> NOTE <br /> Unknown peaks were reported in the TPH analysis of sample P-2-10 <br /> 4.4 Flightline Catch Basin <br /> One sediment sample was collected from the flightline catch basin. <br /> There was no apparent contamination in the sediment based on <br /> discoloration or odor. The sample was analyzed utilizing EPA <br /> methods m8015 (petroleum hydrocarbons) , 602 (purgeable aromatics ) <br /> and 8270 (semi-volatiles) . All results were non-detectable with <br /> the exception of total petroleum hydrocarbons (TPH) . 90 PPM of TPH <br /> in the motor oil range was detected in sample CB. <br /> 4. 4. 1 Conclusions - Flightline Catch Basin <br /> Evidently, contamination has passed through the aircraft washpad <br /> drainage system all the way to the flightline catch basin. The <br /> presence of only relatively heavy petroleum hydrocarbons in the <br /> catch basin sediment indicates the lighter compounds have either <br /> volatilized or been carried downstream. It can be reasonably <br /> deduced that residual washpad contamination has been discharged to <br /> Little John Creek in the past. <br /> 18 <br />