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Table 1 <br /> Groundwater Monitoring Data <br /> Beacon Station No 494 <br /> Stockton,California <br /> i <br /> Monitoring Date TPHg Benzene Toluene Ethyl Xylenes Depth to Reference Depth to Groundwater Comments <br /> Well No benzene GW TOC Elev Screen Elevation <br /> MW-1 05/26/95 <50 <0 50 <0 50 <0 50 <050 6323 1817 6800 -4506 no odor/sheen <br /> 08/15/95 <50 064 082 <050 26 6405 -4588 no odor/sheen <br /> 10/11/95 <50 <050 <050 <0 50 <0 50 6393 -4576 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <050 <0 50 6063 4246 no odor/sheen <br /> 02/21/96 NS NS NS NS NS 5922 -41 05 DTW remeasure <br /> 05/30/96 <50 <050 <0 50 <050 <0 50 9D -3773 Draw down Q 75' <br /> -`MW-2 05/26/95 240 094 <0 50 <050 <0 50 6383 1974 6800 -4409 no odor/sheen <br /> 08/15/95 65 <0 50 <050 <050 <0 50 6465 4491 no odor/sheen <br /> 10/11/95 <50 <050 <0 50 <0 50 <0 50 6273 -4299 DTW on 10124 <br /> 01/16/96 <50 <0 50 <0 50 <050 <050 6120 4146 no odor/sheen <br /> 02/21/96 NS NS NS NS NS 5979 -4005 DTW remeasure <br /> 05/30/96 58* <0 50 <0 50 <050 <050 5681 -3707 Draw down @ 75' <br /> W=3 05/26/95 <50 130 <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 /> F 10/11/95 <50 <0 50 <050 <050 <050 6390 -4475 DTVII on 10/24 <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 /> ' a 05/30/96 <50 093 <0 50 <0 50 <0 50 5587 -3672 Draw down @ 76' <br /> W14 05/26/95 <50 <0 50 <0 50 <0 50 <0 50 6225 1812 72'00 -4413 no odor/sheen <br /> a 08/15/95 <50 <050 <0 50 <050 <0 50 6307 -44 95 no odorlsheen <br /> u s�_ 10/11/95 <50 <0 50 <0 50 <0 50 <0 50 6290 -4316 DTW on 10124 <br /> _u 01/16/96 <50 <0 50 <0 50 <0 50 <0 50 5973 -4161 no odor/sheen <br /> 02/21/96 NS NS NS NS NS 5822 4010 DTW remeasure <br /> 05/30/96 <50 <0 50 078 <0 50 13 5496 -3684 Draw down @ 75' <br /> 04Mr-5 05/26/95 66 <050 <0 50 <0 50 <0 50 6405 2008 7250 -4397 no odorlsheen <br /> a 08/15/95 <50 070 10 <0 50 35 6500 4492 no odor/sheen <br /> ' ,- 10/11/95 <50 <0 50 <0 50 <050 <050 6486 -44 78 DTW on 10124 <br /> 6"5 01/16/96 <50 <0 50 <050 <050 <0 50 6145 4137 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 <050 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 feel <br /> r <br />