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Table 3 } Groundwater Monitoring Results-BTEXITPH as Gasoline Analyses Del Monte Disco Property Stockton,California 4 Concentration u Sample TPH Ethyl well Date Gasoline Benzene Toluene benzene Xylenes Dilution Lead TCLP - 500 - - - 5,000 .MCL - 1 1,000 680 1,750 50 MW-DIS-7D 9/23/91 <250 <0.8 6130192 1011192 <50 <0.5 <0.5 <0.5 <0.5 NA 1/21193 <50 <0.5 <0.5 <0.5 <0.5 NA 3129193 <50 <0.5 <0.5 <0.5 <0.5 NA 7/20193 <50 <0,5 <0.5 <0.5 <0.5 <0.6 ? 9130/93 <50 <0.5 <0.5 <0.5 <0.5 NA 1112/94 <50 <0.5 <0.5 <0.5 <0.5 NA 4/14194 <50 <0.5, <0.5 NA i 7120/94 <50 <0.5 <0.5 <0.5 <0.5 <0.6 10/27/94 <50 <0.5 <0.5 <0.5 <0.5 NA 313195 <50 <0.3 <0.3 <0.3 <0.3 NA 12/22/97 <50 <0.3 <0.3 <0.3 <0.3 2:1 NA 4116198 <50 <0.3 <0.3 <0.3 <0.3 I:1 NA 7123198 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 11/11/98 1 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA MW-DIS-8S 3/3/95 <50 <0.3 <0.3 <0.3 <0.3 NA 6119195 <50 <0.3 <0.3 <0.3 <0.3 NA 10/18/95 <50 <0.3 <0.3 <0.3 <0.3 I:I NA { 2113196 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 6/6/96 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 8/15/96 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 12120/96* <0.5 <0.5 <0.5 1:1 NA } 12/20/96 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA +� 4/17/97 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 8112197 ND ND ND ND ND NA l 12122197. <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 4/16198 <50 <0.3 <0.3 <0.3 <0.3 1.1 NA 7122198 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 11/11/98 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA MW-DIS-8D 313195 <50 <03 <0.3 NA 6119/95 <50 <0.3 NA 10/18/95 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 2113196 <50 <0.3 <0.3 <03 <0.3 1.1 NA ' 6/6/96 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA ii 8/15196 <50 <0.3 <0.3 <0.3 <0.3 1 a NA 12119196'" <15 <0.5 <0.5 <0.5 <0.5 IJ NA 12/19/96 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 12/22/97 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 4/16/98 <50 <0.3 <0.3 <0.3 <0.3 1.1 NA 7/22198 <50 <0.3 <0.3 <0.3 <0.3 1:1 NA 11/11/98 <50 1 <0.3 <0.3 <0.3 1 <0.3 l:l NA I I . R Gdata9-98.xis Page 4 of 6 1122/99