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NIITTELHAUSER <br /> corporation <br /> _ F_f� <br /> I Unocal Corporation September 1992 <br /> Tracy, California Rev.0 <br /> Quarterly Monitoring &Sampling Report 2168T001.wk1 <br /> TABLE 2 <br /> L SUMMARY OF GROUNDWATER ANALYTICAL RESULTS <br /> r. <br /> WELL SAMPLING TPH—G BENZENE TOLUENE ETHYL— :. XYLENES <br /> NUMBER DATE BENZENE :, <br /> (ppb) (ppb) (Ppb) (ppb) (ppb) <br /> 07!15!91 <br /> MW1 >. <br /> 08/15/91 ND ND ND ND ND <br /> :0311`.7193 <br /> .. <br /> N�.... <br /> 08/15/91 ND ND ND ND ND <br /> 1:21.1.1191 <br /> 03/13/92 ND ND NO ND ND <br /> 09/21/92 ND ND ND ND ND <br /> M W-3... 071.:1519.1. 230 3514: <br /> ... ....... <br /> 08/15/91 550 110 ND 94 14 <br /> ..',;70 <br /> 03/13/92 ND ND ND ND ND <br /> 0 6t0192 900 39. N�...:: ND ¢ : <br /> 09/21/92 240 1 86 1 ND I 12 2.8 <br /> 11/24/92 --- WELL ABANDONDED --- <br /> II�W ND t3 7 <br /> 08/15/91 ND ND ND ND ND <br /> a9� 21s1. NCS .. �Q ND... ?: . .. <br /> 12/11/91 ND ND NO ND ND 1 <br /> 06/10/92 ND ND ND ND ND <br /> 03117!93 ND ND ND ND ND <br /> Detection Limits: 50 0.5 <br /> 0.5 <br /> 0.5 0.5 <br /> NOTES: <br /> Results are in parts per billion(ppb). <br /> TPH-G=Total petroleum hydrocarbon as gasoline. <br /> r <br /> NO= Not detected at analytical detection limits. <br /> a x <br />