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11 <br /> F ! I <br /> 22 November 1999 <br /> AGE NC Project No 95-0135 In t <br /> NO of 4 i <br /> The highest concentrations of hydrocarbons were detected in welLMW-1 located near the western <br /> edge of the property, north of the farmer dispenser at the site Benzene was detected In the water <br /> sample from well MW-IA at 3,200 micrograms per liter (µg11) <br /> TPH-g was detected at a concentration of 7,115 ug/1 in the sample from well MW-IA Sample MW- <br /> ` <br /> 1B, collected from the upper screened casing of the well, contained TPH-g at a concentration of ; <br /> 4,770 ug/l _ <br /> The maximum toluene`concentration detected was 56,ug/l, encountered In MW-I A The maximum e <br /> ethylberizene and total xylenes concentrations of 500,ug/l and 420 ug/l, were encountered in sample ; <br /> MW-IA and MW-2B, respectively, F <br /> The oxygenated fuel additives DIPE, TAME, and MTBE were detected in the water samples <br /> collected from,the site DIPE was detected In wells MW-1A, MW-IB, MW-2A and MW-2B at , <br /> concentrations of 5 Oug/l, 15 µgll, 170 ug/l and 17ug/l respectively TAME was detected'm wells <br /> IMW-1A, MWAB,MW-2A, MW-2B and MW-3A at concentrations of 2,160,ug/l, 35,ug/l 130 µg/1 <br /> 1,250 4g11, and 2 5 µgll respectively MTBE was detected in MW-2B ata concentration of 250,ug/l <br /> , <br /> Analytical results of ground water samples are summarized on Tables 2 and 3-The laboratory report' <br /> (PET PE6017-01 to 06) Quality Control and Quality Assurance(QA/QC) and chain-of-custody are _ ! <br /> In Appendix B <br /> 4.0. SUMMARY/CONCLUSIONS <br /> The following conclusions were drawn from the results of this investigation <br /> On 23 September 1999,the ground water flow direction at the site was generally toward,the <br /> northeast' Ground water elevation has risen an average 0 66 feet between the sampling ' <br />' events <br /> The analytical data from the lower screened casing ;intervals of wells MW-1 and MW-2 <br /> I ! indicted that,the highest concentration of dissolved hydrocarbons remains in the western <br /> portion of the site and in the lower screened interval r <br /> ' 3 4 Monitoring well MW-3,appears to be located near the eastern margin of the' dissolved j <br /> hydrocarbon plume <br /> The,lateral extent of dissolved hydrocarbons is notidefined west)'south and north of well <br /> MW-I or south and north of well MW-2 i <br /> Advanced GeoEmironmental,Inc <br /> r <br /> 4 t I F <br /> r <br /> 1 <br /> S 5 i 1 <br />