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TABLE 3 (continued) <br /> ANALYITCAL RESULTS OF WATER SAMPLES <br /> Geweke Land Development & Marketing <br /> (Ag/L) <br /> TPH as Ethyl- <br /> Sample ID Date Gasoline Benzene Toluene benzene Xylene <br /> MW-12 12-9-91 ND ND ND ND ND <br /> (continued) 3-26-92 ND ND ND ND ND <br /> 6-29-92 ND ND ND ND ND <br /> 10-1-92 ND ND ND ND ND <br /> I 12-31-92 ND ND ND ND ND <br /> 4-1-93 ND ND ND ND ND <br /> 9-27-93 ND ND 0.87 ND 0.66 <br /> I 12-27-93 ND ND ND ND ND <br /> 3-28-94 280 2.6 6.6 1.5 6.3 <br /> MW-13 5-20-91 ND ND ND ND 0.60 <br /> I 9-25-91 ND ND ND ND ND <br /> 12-9-91 ND ND ND ND ND <br /> 3-26-92 ND ND ND ND ND <br /> I 6-29-92 ND ND ND ND ND <br /> 10-1-92 ND ND ND ND ND <br /> 12-31-92 ND ND ND ND ND <br /> 4-1-93 ND ND ND ND ND <br /> 9-27-93 ND ND ND ND ND <br /> 12-27-93 ND ND ND ND ND <br /> 3-28-94 ND ND ND ND ND <br /> MW-14 9-27-93 1,400 160 220 ND ND <br /> 12-27-93 870 35 92 1.8 68 <br /> 3-28-94 280 1.3 11 4.3 66 <br /> I - EW-1 5-20-91 7,200 330 ND ND 1.2 <br /> 4-9-93 2,700 90 4.5 86 150 <br /> I 9-27-93 2,200 1300 ND 76 190 <br /> 12-27-93 810 37 0.79 4.7 19 <br /> 3-28-94 1 5,400 1 5.6 1 3.6 100 1 520 <br /> parts per billion(ppb) <br /> ND = None Detected <br /> 5.2 Petroleum Hydrocarbon Contamination <br /> i <br /> In wells that are sampled on a quarterly basis (MW-6, MW-7, MW-10 through MW-14 and <br /> EW-1),five samples indicated an increase in petroleum hydrocarbons contamination (MW-6, <br /> MW-7, MW-11, MW-12 and EW-1) and two samples indicated a decrease in contamination <br /> (MW-10 and MW-14 since the December 1993 sampling. MW-13 remained "ND" for <br /> petroleum hydrocarbons. Table 3 presents the history of groundwater contamination at the <br /> Geweke Site. <br /> Oeoh0.1 mat 5—i-,1.. 14 <br /> L.33XWGLDM QRt <br /> • <br />