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k Y t' •1 5 _ - 1 - •f `t ` 1 , E I, t rad <br /> 18'August-19947 <br /> �AGE;NC Project N695 01 <br /> 4:. <br /> Page' of 4 <br /> B <br /> .:'included in A ppendix <br /> , <br /> . i <br /> 3 3: CHLORINATED.HYDROCA_ RBON-IMPACTEDGROUND'W.ATER f <br /> During the June'1997'`sainpling;chlorinated hydrocarbon's were•detected in the sannple collected <br /> from monitoring well MW-3 at."concentrations of 2;300 ppb cis`1;2-drehl'oroethene.(1,2-DCE),:180 ti <br /> ppb tetrachlor`aethen&(PCE) and.130 ppb lrichl'oroetheiie (TCE). Vinyl chloride was also detected <br /> irrthe'l'sarne,sample ata concentration of 240PO.. 1 ' <br /> The compounds:l,2=dichlorobenzene,PCE,TCE and:vinyl chlorideti'ere also detected in the,saimple <br /> from MW-2 at concentrations of 2.0 ppb, 1:5 ppb;'0.60 ppb and„1.8'ppb,tespediively.,1,2-DCE,'PCE. <br /> and TCE were detected in 1ViW=i at concentration§ of.0.84 ppb, 4:7 ppb and 4:6'ppb, respectively. <br /> PCE was&fe'cted in'the sain les from MW-4 and at concentrations a , .. <br /> • P . , . . : . s high as 2.3-PPb•• .. ' <br /> Analytical resuIts.for chlorinated hydrocarbons compounds in'ground'�rtater samples'are summarized. <br /> in Table 3 -Analytrcal Results of Chlorinated Hydroebfboh Corr pound The'laboratory report(IvIt1I <br /> Laboratory ID numbers 77096 through 771'00),:chain-of-custody and'QA;'QC report are included in . <br /> Appendix B. - <br /> ' -4.0. SUMMARY AND CONCLUSIONS <br /> Based upon results.of ground-water monitoring and.well sampling, AGE-con.clude's'the following"-','_' <br /> • During-the sampling event;;the depth to groundwater at the site ranged from 27.23 to 26:73. <br /> feet belovii-the tops.of-the well casings; with the ground water flow direction,generally <br /> 'toward'MW-1' from the northern andeastcrn portions of the site; and ioutliwes6vard.froni', ; <br /> MW_1, <br /> • TPH-ss compounds were,detected in wells MW-2.and.IvlW-3.' <br /> L „ <br /> •".BTE&X compounds'ii=ere:detected only i 'A6 sazi-iple co11ected,from MW-3R. <br /> The' chiorinated' hydrocarbon compounds 1,2-DCE, PCE, 1TCE and'vinyl 'chiorde were'. <br /> detected in the-water;sample:collected frori monitoring well MW-3,at concentrations which, <br /> exceed their Maximum Contaminant Levels(1VICLs)established by the State of Californial, } <br /> '• De ,artment' of Health Services: bower concentrations 'of the=chlori�ia <br /> p ted„hydrocarbon <br />•L x,. - f. <br /> - compounds;;Which-do not exceed their,MCLs;were'detected in water samples collected from , <br /> the•surroundirig wells, both ori-site and�'off--site. - <br /> •. . The'easiern and-southein extent of the dissolved.plume has'not-been delineated. <br /> Advanced GenEnN!ronrnenYal,[nc <br /> w <br /> , <br />