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Table <br /> Groundwater Monitoring Data and Analytical Results <br /> Former Unocal Service Station#0187 <br /> 437 East Miner Avenue <br /> Stockton,California <br /> WELL IDI DATE Dissolved 02 TPH(G) B T E X MTBE <br /> ("W/L) (ppb) (Ppb) (PPB) (ppb) (ppb) (Ppb) <br /> NP-2-116 <br /> (cont) 2/27/01' NS 142 28 1 0 955 107 0 892 <2 50/<2 0' <br /> '✓63106/01 359 <50 0 220 0 806 0 630 0 679 3 12 <br /> I—nII3/01 439 582 221 0 816 0 781 0 800 <2 50 <br /> ✓03127101 492 778 243 1 13 121 176 609 <br /> ✓04110101 356 761 258 <0 500 129 1 76 3 74 <br /> ✓114/24/01 359 81 1 275 1 11 126 146 426 <br /> ►45/08/01 378 691 201 1 13 106 143 482 <br /> 05114/011 <br /> NS 175 470 244 282 288 <5 001<2 002 <br /> ✓65122101 2 18 145 388 241 249 293 <2 50 <br /> ✓06105101 NS 79 33 12 1 10 1 1 <2 5 <br /> w06/19/01 364 <50 23 13 10 13 <2 5 <br /> ✓07103101 409 100 38 18 1 1 2 3 <5 0 <br /> v07/17/01 433 <500 35 <5 0 <5 0 <5 0 <25 <br /> 7/31/01 77 27 094 1 1 12 <2 5 <br /> Notes <br /> Wells are 3/4"nested piezometers <br /> Wells were not purged prior to sampling <br /> DO readings were taken after collection of groundwater samples <br /> Samples collected by GR groundwater sampling&monitoring group as part of regular quarterly monitoring program Wells purged prior to sampling <br /> 2MTBE by EPA Method 8260 <br /> 24004209-1 6 <br />