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APPENDIX D(Continued) HISTORICAL GROUNDWATER ANALYTICAL DATA USA STATION#110 STOCKTON,CALIFORNIA Well ID Date TPH G TPH D Benzene Toluene Ethyl- Xylene Total- MTBE Sampled , benzene Lead (n9/1) (mom} 0911} (ug/l), (ug/1) (vgA) (mom) (uln) MW-3P 09/29/92 670 ND(10) 2.1 2.1 ND(1.0) 4.1 NA NA 09/15/93 550 ND(1.0) 2.6 2.6 2.3 14 NA NA 03/07/94 440 ND(1.0) 2.6 2.6 ND(1.0) ND(1.0) NA NA 08/30/94 600 ND(1.0) 1.3 1.3 ND(0.5) ND(0.5) NA NA 12/08/94 930 ND(O.4) 0.79 4.6 ND(0.5) 1.2 .0037 NA 03/22/95 570 ND(O.4) 1.3 3.8 ND(0.5) 0.66 .0012 NA 06/23/95 670 ND(O.4) 0.96 4.5 ND(0.5) 1.9 ND(4.003) NA 10/10/95 270 ND(10) 0.7 3.5 ND(0.5) 1.1 NO(0.002) NA 01/18/96 170 ND(0.05) ND(3.0) 3.8 ND(3.0) ND(3.0) ND(0.002) NA 04/26/96 140 ND(0.05) ND(0.5) 3.4 ND(O.5) 1.1 ND(O.002) NA 07/19/96 130 ND(0.05) ND(0.5) 3.6 ND(O.5) ND(0.5) ND(0.003) ND(5.0) 10/30/96 ND(50) ND(0-05) ND(0.5) ND(0.5) ND(0.5) ND(0.5) ND(0.002) ND(5.0) 01/24/97 110 NA ND(0.5) 2.7 ND(0.5) ND(0.5) NA NA 04/21/97 680 NA 0.89 8.1 ND(0.5) 0.82 NA ND(5.0) 07/30/97 ND(50) NA ND(0.5) ND(O.5) ND(0.5) ND(O.5) NA NA 10/31/97 110 NA ND(0.5) ND(0.5) ND(0.5) ND(O.5) NA NA 01/22/98 170 NA ND(0.5) 5.1 ND(O.5) ND(0.5) NA NA 04/16/98 480 NA1.8 17 1.5 - 9.2 NA ND(5.0) 07/17/98 520 NA 1.0 9.7- 0.87 1.8- NA- ND(5.0) 10/20/98 - *" 12/18/98 550 NA ND(0.5) 8.8 0.54 1.6 NA ND(5.0) MW-4P 10/10/95 ND(50) NA ND(O.5) ND(O.5) ND(0.5) ND(0.5) ND(0.002) NA 01/18/96 ND(50) ND(O-05) ND(3.0) ND(3.0) ND(3.0) ND(3.0) ND(0.002) NA a 04/26/96 ND(50) ND(0-05) ND(0.5) ND(0.5) ND(0.5) ND(0.5) ND(0.002) NA 07/19/96 ND(50) ND(0.05) ND(0.5) ND(0.5) ND(O.5) ND(0.5) ND(0.003) ND(5.0) 10/30/96 ND(50) ND(0.05) ND(0.5) ND(O.5) ND(O.5) ND(0.5) ND(0.002) ND(5.0) 01/24/97 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA NA 04/21/97 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 07/30/97 ND(50) NA ND(0.5) ND(0.5) ND(O.5) ND(0.5) NA NA 10/31/97 ND(50) NA ND(0.5) ND(0.5) ND(O.5) ND(0.5) NA NA 01/22/98 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA NA 04/16/98 ND(50) NA 0.98 5.2 0.59 3.0 NA ND(5.0) 07/17/98 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 10/20/98 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(O.5) NA ND(5.0) MW-5P 10/10/95 ND(50) ND(10) ND(0.5) ND(0.5) ND(0.5) ND(O.5) ND(0.002) NA 01/18/96 ND(50) ND(0.05) 3.1 6.8 0.93 6.0 ND(0.002) NA 04/26/96 ND(50) ND(0.05) ND(O.5) ND(O.5) ND(0.5) ND(O.5) ND(0.002) NA 07/19/96 ND(50) ND(OA5) ND(0.5) ND(O.5) ND(0.5) ND(0.5) ND(0.003) ND(5.0) 10/30/96 ND(50) ND(0.05) ND(O.5) ND(O.5) ND(0.5) ND(0.5) ND(0.002) ND(5.0) 01/24/97 ND(50) NA ND(0.5) ND(O.5) ND(0.5) ND(0.5) NA NA 04/21/97 ND(50) NA ND(0.5) ND(0.5) ND(O.5) ND(0.5) NA ND(5.0) 07/30/97 ND(50) NA NAM) ND(0.5) ND(0.5) ND(0.5) NA NA 10/31/97 ND(50) NA ND(O.5) ND(0.5) ND(O.5) ND(0.5) NA NA 01/22/98 NS NS NS NS NS NS NS NS 04/16/98 NS NS NS NS NS NS NS NS 07/17/98 NS NS NS NS NS NS NS NS 10/20/98 NS NS NS NS NS NS NS NS