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' 05:May,1999 'AGE NC'Project No.:95=0114 ., a t r Lf` 1 Page 3 of 5 •' The'g � .. . ,...:,:.': ,• . ;; . ., round wa#er gradient'inferred from the.January 1999 sampling event appears to be steepest from,MW'2•flowi4g-north:toward'_welI'MW-3 andfr&In "wells MW-1' and•:MW-3'toward the west :{ toward well-MW-5.'Ground-water elevation'.data are,summarized in Table_1:The'relative ground water'eleva#ion for the.Janu 1 ary 999.sampling is depicted inTigure 3 ..j 1.2, E :P HYDROCARBON IMPACTED GROUND ,WATER During the'January 1999 sampling,�TPH-ss was.detected in monitoring.wells MW-I,:MW�-2 and MW-3 at concentrations of 55,mierograms per liter (µg/l), 720-µg/l and 3,100 �ug/l, respectively. respect '. TPH-ss was"not d etected in- samples'collected from wells MW-4 MW-5 during this sam" pling r event. BTEX compounds were detected in the wafer sample.collected from monitoring well MW 3, ' which'contained '1 A g/1 benzene, 'I.0'1zg/1 toluene;2.7 ,ug/l ethylbenzene and 20 ,ug/l xylenes. Xylenes were"also detected in the water'sample from well MW-2 at a concentration of 2:8',ug/L .Analytical results of ground water samples'are,summarized in Tables 2. The'laborato 're ort for P. . (MAI Laboratory ID numbers 01893 through 01897),quality.assurance and quality control(QA/QC) report and chain-of-custody form for'the January 1999 ground water monitoring event are included in Appendix B. ' CHLORINATED HYDROCARBON-IMPACTED GROUNDWATER .During the January 1999 sampling,chlorinated hydrocarbons were detected in the sample collected from-monitoringwell MW-3 which _ h contained 470 Ecg/l cis 1,2 dichloroethene (cis='I,2-DCE) and 1301,yg/1 vinyl chloride. The'compounds 1,2-dichlorobenzene and vinyl chloride were detected'in the sample from well MW-2 at concentration`s of 2.4g/l'and 0.6 �cg/l', respectively. 4 Tetrachloroethene(PCE),trichloroethene(TCE)'and cis-I;2-DCE were;detected-,in the sample from well MW-I'at\concentrations of 0.83, g/1,�1.4 yg/l and'1.5 ,ug/l;'respectively. Chloroform and FCE were detected,in'the_well'MW-4 sample'at i.81,ig/l and 2.2µg11, 'respectively; chloroform was°the only'analyte detected in the sample,from well MW-5', 'and was present'at a;'concentration of 0.52 . ' Analytical`results.for chlorinated hydrocarbon compounds'in ground water samples are summarized. in Table.3. The laboratory report for January(MAI Laboratory;ID numbers'01893 through 01897.)" ' QAIQC report and chain-of custody form are included in Appendix B. - { Advanced GeoEnvironmentai,Inc.