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1 <br /> 1 04 December 2002 <br /> AGE-NC Project No 00-0764 <br /> Page 3 of 4 <br /> 3 2 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> The results of laboratory analysis of ground water samples collected at the site on 30 September <br /> 2002 are as follows <br /> ' • TPH-g was detected in the samples from ground water monitonng wells MW-3,MW-4 and <br /> MW-5 at concentrations of 430 micrograms per liter (µg11), 280 µg11 and 220 µg11, <br /> respectively <br /> • Benzene was detected in the sample from monitoring wells MW-3 and MW-4 at <br /> ' concentrations of 7 µg/1 benzene and 16 µg/1,respectively In addition,toluene and xylenes <br /> were detected in the sample collected from well MW-5 at concentrations of 2 µg11 and <br /> 2 4 µg/1, respectively <br /> ' • DIPE was detected in the samples collected from wells MW-3 through MW-5 at <br /> concentrations of 2 8 µg/1, 3 5 µg/1 and 14 µg/1,respectively 1,2-DCA was detected in the <br /> samples collected from wells MW-3 and MW-4 at concentrations of 15 µg/1 and 4 6 µg/l, <br /> respectively 1,1-DCA was detected in the samples collected from wells MW-2,MW-3 and <br /> MW-4 at concentrations of 13 µg/1, 11 µg/1 and 8 6 µg11, respectively <br /> • In addition,cis,1,2-dichloroethane and n-propylbenzene were detected in samples MW-3 and <br /> MW-4 at maximum concentrations of 14µg/1 and 3 1 µg/1,respectively, isopropylbenzene <br /> was detected in sample MW-3 at 15 µg11, and 1,3,5-tnmethylbenzene and 1,2,4- <br /> 1 tnmethylbenzene were detected in sample MW-5 at concentrations of 2 0 µg/1 and 3 5 µg/1, <br /> respectively <br /> No additional target analytes were detected in the samples analyzed Laboratory results of samples <br /> analyzed for petroleum hydrocarbons are summarized in Table 2 and Table 3 The laboratory reports <br /> ' (CTEL Laboratory ID 0210-003-1 through-6),quality assurance and quality control(QA/QC)reports <br /> and chain-of-custody form is included in Appendix C <br /> ' 4.4. SUMMARY AND CONCLUSIONS <br /> ' Based upon the results of this quarterly monitoring event, AGE concludes <br /> • Ground water flow direction was inferred to be towards the east at a gradient of <br /> ' approximately 0 005 ft/ft <br /> • The highest concentrations of dissolved petroleum hydrocarbons were detected m the sample <br /> ' collected from well MW-3, near the former UST location <br /> ' Advanced CeoEnvironmentai,Inc <br />