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` t 7k i.- •r ti t � Ir i ,s o''s r 'F e /} <br /> ps <br /> T, <br /> a <br /> AGE-NC Project No 95:-,01,11'4 <br /> r 4 f <br /> Page 3 of°4r <br /> 3.3." -CHLORINATED HYDROCARBON-IMPACTED'GROUNDWATER ' <br /> During'the•DecemberA997-�sampli�ig;=chfarinated hydrocarbons_ were detected in'Ahe sample., <br /> collected',from mo nitoring-well`MW-3R;.wliich contained'2',000�-ppb cis,l;2-dichloroetherie (1,2 <br /> DQE) and 460 ppb •vinyl chloride. 1,1-)CEwas deietted_in four-_of the .five samples analyzed. <br /> Monitorinfwells MW-I,MW-2;MW-3R and•MW=4 contained I,2=DCE a t'concentrations'of 0:62 , <br /> :­ <br /> ppb0.71;pPb> 2;000 ppb and 1.2"ppb, f&§pectively. F <br /> 'The coinpounds 1,2-dichlorobenzene;'tetracholorethyTene'(T.CE) acid vinyl chloride were'detected <br /> `in the sample froin.MW-2,'at concentrations of 1.7-ppb,.0.95 ppb.and a.8 ppb, respectively:_ <br /> PCE,'TCE and•1,2=DCE were detected�in MW-'4 at concentrations of-2,.8 ppb; 3.3 ppb and 0.62 ppb, .r ' <br /> r`espectively.-PCE-was.detected-in the samples from MW 4 at,a concentration of4.7 ppb: <br /> ..-Analyfical'results for chlorinated hydrocarbon compounds in-ground water samples are summarized <br /> in.Table 3. The•laboratory:report (MAI Laboratory ID numbers'84719 through 847263);°chain-of <br /> cu to and QA/QC re ort•are included in.Appendix endix B. : <br /> s - dy . Q Q P - PP. <br /> 4.0. SUMMARY'ANI) CONCLUSIONS' <br /> d upon result gro <br /> Baseund waterm <br /> , nitoring.'and-well sampling, AGE concludes:- , <br /> , <br /> • During the'sampling event, the depth to:ground water at the site ranged from 27.9.1 to 28.4 <br /> feet below'tops of the«yell casings.-with the ground,water flow direction generalty..toward <br /> the east: k ; <br /> • "TPH-ss compounds 'IN-ere detected in-wells MW-2 and MW-3R. <br /> Various BTEBcX compounds were detected in the''sample's collected from MW-2, MW-3R'; <br /> 'i. MW-4.and MW-5. <br /> •'. The_chlorinated hydrocarbon. compounds,'l,2=DCE, PCE,-TCE and vinyl-chloride were f <br /> + . _ detected in-the water sample collectedfrom monitoring well MW=3R;•at'.concentrations <br /> which exceed their'Max irriuin Contaminant-,Levels (MCLs) established by,the State'of <br /> ' . California ` ,'Department of Health,=Services: Lower- concentrations of the 'chlorinated <br /> ' C hydrocarbon compounds,which do not,exceed-their MCLs, were detected in water.samples <br /> collected-from' the 'surroundin . wells 'both on-site and off-site: <br /> s <br /> g ;, <br /> The eastern;down-gradient vgent of the dissolved'plume-has not been delineated. <br /> cuEnrironnicntal;Inc. <br /> Ad,' ced G <br />