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• <br /> i� <br /> motor oil was measured in the December sampling at 57 0 ug/L, it <br /> was below detection limits in July <br /> MW-3 The July sampling revealed only Benzene at 0 3 ug/L, the <br /> December sampling revealed ALL measured substances were below <br /> detection limits <br /> MW-4 Benzene was measured at 0 5 ug/L in July, it was below <br /> detection limits in December Toluene was measured at 0 5 ug/L <br /> in July, and at 1 0 ug/L in December Ethylbenzene was ND in <br /> July, but 17 0 ug/L in December Xylenes were detected at 12 0 <br /> ug/L in July, & 10 0 ug/L in December TPHg, which was ND in <br /> July, was measured at 417 0 ug/L in December TEPH, (diesel <br /> range, ) was measured at 6900 ug/L in July, and 2020 ug/L in <br /> December <br /> MW-5 (Nomellini well ) We did not sample this well in July, but <br /> the December event showed very high levels of benzene, toluene, <br /> ethylbenzene, xylenes, & TPHg TEPH was below detection limits <br /> SUMMARY OF RESULTS OF THE LATEST WORK <br /> . PLATES II through VII show the estimated lines of equal concen- <br /> tration of the six tested substances from the latest sampling <br /> event A brief discussion of those plates follows . <br /> BENZENE - Monitoring wells #1 through #4 , which were placed in <br /> July per WJH workplan, were all below detection limits This <br /> contrasts with the July results, which revealed that MW-3 & MW-4 <br /> contained minor amounts <br /> TOLUENE - MW-1 measured 4 . 0 ug/L in July, and 6 . 0 ug/L in <br /> December MW-2 & MW-3 were ND in both samplings MW-4 measured <br /> 0 5 ug/L in July, and 1 0 ug/L in December <br /> ETHYLBENZENE - MW-1, MW-2 , & MW-3 were ND in both events MW-4 , <br /> which was ND in July, revealed 17 0 ug/L in December <br /> XYLENES - MW-1 & MW-2 measured minor amounts in July, both were <br /> ND in December MW-3 was ND in both events MW-4, which <br /> revealed 12 0 ug/L in July, measured 10 0 ug/L in December <br /> TPHg - MW-1 showed 78 0 ug/L from the July sampling, it was ND in <br /> December MW-2 & MW-3 were ND from both events MW-4, which was <br /> ND in July, measured a concentration of 417 ug/L in December, a <br /> significant increase <br /> rTEPH - MW-1 & MW-3 did not reveal any TEPH during either sampling <br /> 2 <br />