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Table 1 <br /> Groundwater Monitoring Data <br /> Beacon Station No 494 JUL 2 5 1996 <br /> Stockton,California <br /> ENVIRONMENTAL HEALTH <br /> PERMIUSERVICES <br /> Monitorsng Date TPHg Benzene Toluene Ethyl Xylenes Depth to Reference Depth to Groundwater Comments <br /> Well No benzene GW TOC Elegy Screen Elevation <br /> 05/26/95 <50 <0 50 <0 50 <0 50 <0 50 6323 1817 6800 -4506 no odor/sheen <br /> 08/15/95 <50 064 082 <0 50 26 6405 4588 no odorlsheen <br /> 10/11/95 <50 <0 50 <0 50 <0 50 <0 50 6393 -4576 DTW on 10124 <br /> 01/16/96 <50 <0 50 <050 <0 50 <0 50 6063 -4246 no odorlsheen <br /> 02/21/96 NS NS NS NS NS 5922 -41 05 DTW remeasure <br /> 05/30/96 <50 <0 50 <0 50 <0 50 <0 50 5590 -3773 Draw down @ 75' <br /> 05/26/95 240 094 <0 50 <0 50 <0 50 6383 1974 6800 -4409 no odorlsheen <br /> 08/15/95 65 <0 50 <0 50 <0 50 <0 50 6465 -4491 no odor/sheen <br /> 10/11/95 <50 <0 50 <050 <0 50 <0 50 6273 -4299 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <0 50 <0 50 6120 -4146 no odorlsheen <br /> 02/21/96 NS NS NS NS NS 5979 -4005 DTW remeasure <br /> 05/30/96 58* <0 50 <050 <0 50 <0 50 5681 -3707 Draw down @ 75' <br /> 05/26/95 <50 1 30 <0 50 <0 50 <0 50 NR 1915 6800 NR pumping well <br /> 08/15/95 66 110 <0 50 <0 50 <0 50 7920 -6005 DTW taken w/pump on <br /> 10111195 <50 <0 50 <0 50 <0 50 <0 50 6390 -4475 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <0 50 <0 50 6256 -4341 pumping well <br /> 02/21/96 NS NS NS NS NS 5910 -3995 DTW remeasure <br /> r 05/30/96 <50 12 <0 50 <0 50 <0 50 5587 -3672 Draw down @ 76' <br /> 05/26/95 <50 <0 50 <0 50 <0 50 <0 50 6225 1812 7200 -44 13 no odor/sheen <br /> I 08/15/95 <50 <0 50 <0 50 <0 50 <0 50 6307 -4495 no odorlsheen <br /> 10/11/95 <50 <0 50 <0 b0 <0 50 <050 6290 -4316 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <0 50 <0 50 5973 -4161 no odorlsheen <br /> 02/21/96 NS NS NS NS NS 5822 -4010 DTW remeasure <br /> 05/30/96 <50 <0 50 1 2 <0 50 <0 50 5496 -3684 Draw down @ 75' <br /> 05/26/95 66 <0 50 <0 50 <0 50 <0 50 6405 2008 7250 -4397 no odorlsheen <br /> 08/15/95 <50 070 1 0 <0 50 3 5 6500 -4492 no odorlsheen <br /> 10/11/95 <50 <0 50 <0 50 <0 50 <0 50 6486 -4478 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <0 50 <0 50 6145 -41 37 no odor/sheen <br /> 02/21/96 NS NS NS NS NS 6009 -4001 DTW remeasure <br /> 05/30/96 <50 <0 50 072 <0 50 <0 50 5664 -3656 Draw down @ 74' <br /> Notes TPHg=Total Petroleum Hydrocarbons as gasoline <br /> Analytical results reported in parts per billion(ppb) <br /> GW=Groundwater TOC=Top of Casing NS=not sampled <br /> Elev =Elevation referenced to arbitrary datum above sea level <br /> Depths and elevations recorded in feet <br />