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<br /> 998--l'
<br /> AGE NC Project No95-0114'.1,
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<br /> CHLORINATED HYDROCARBON:IMPACTED`GROUND WATER j R
<br /> Dunng the March 1998 sampling,chlorinated hydrocarbons were,detected m.the sample:collected' f
<br /> 5 from'monitoring"well MW=3; which contained 83.0'µg11,cig 1 2=dichIoroethene(cis.l 2-DCE) and
<br /> r, : _.
<br /> 160.µg/1 vinyl-chloride Tl e'compounds' 1•,2=dichloiobenzene and vinyl chloride were detectedlin
<br /> the sample"from'well MW-2 concentrations'of 2.2 µg/1 and'1 Aµfill; respectively.' '
<br /> is i a.
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<br /> Trichloroethene:(TCE)and'cis 1,2=DCE'Weie detected in well MW-1 at concentrations of 1:8 µg11
<br /> ,., .
<br /> and 0.98 jcg/1;respectively. Tetrachloroethene(PCE)and`cis=1,2-DCE were detected in well MW=4
<br /> atconcentrations of 4.5 µfill and 0.88 E'g/l, respectively.
<br /> During'the July'1998 sampling,:chlorinated,hydrocarbons were detected in the samplecollected from
<br /> monitoring well.MW=3;'which contained 710µfill cis 1,2-dichloraethene (1,2-DCE) and 20Oµ /l
<br /> g
<br /> vinyl .chloride.•'.1,2-DCE'.was detected in well`."MW-4 at 1.4 'µg/l. The', compoimds•. 1',2-
<br /> dichlorobenzene and Vinyl chloride were detected in the sample from MW-2 at concentrations of 2 .5 .
<br /> Ug/l and6.5 µg11, respectively.
<br /> PCE and.TCE were detected in sMW-1-at,co of 0.59 ug/1 and'1:0.µg/1,respectively.iPCE
<br /> ' .and TCE,were•detected in-the.samples -
<br /> from-MW 4 at concentrations of 5.9:µg11.and 0.74-,u • ,
<br /> respectively.
<br /> Analytical results for.chlorinated hydrocarbon compounds in ground'water.samples are summarized
<br /> in Table 3. The laboratory,repo rt (MAI LaboratoryJID numbers 87570 through 87574 and'91476
<br /> through 91480), QA/QC report and chain-of-'custody farm are included in Appendix C-.
<br /> tl 4.0: SUMMARY AND CONCLUSIONS >>
<br /> Based upon results of'ground`water,'monitoring•and-well sampling, AGE,concludes:.r a
<br /> '. .Over the
<br /> past six months the relative-ground Water elevation increased approximately 6 feet.
<br /> -TPH-ss compounds were detected in wells MW-1, MW-2 and MW-3.' `
<br /> • , Low concentrations of two:BTEX compounds were detected"in the samples collected from. .,
<br /> ,. MW 2 (xylene),and MW=3(ethyl-benzene and xylene).
<br /> The "chlorinated h drocarbori corn o
<br /> . , y pound.PCE was detected-in the'water sample collected .t
<br /> 'from,rnori toring Wells at concentrations which exceed their Maximum Contaminant Levels.,j- '
<br /> Ls) established b 'the State:of"California,. } y =Department of Health Services.
<br /> E '' AdvancedCe oEnvironmental,me., F
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