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TABLE 2 GROUNDWATER ANALYTICAL DATA ' USA STATION##110 STOCKTON,CALIFORNIA Well ID Date ' TPA G TPH D Benzene Toluene Ethyl- Xylene Total. MTBE ., Sampled benzene Lead: (ug/l) ,(U ?_-_ (u ) (ugl[)- (MgA) MW-1-P 09/29/92 ND(100) ND(10) ND(1.0) ND(I.0) ND(1.0) ND(1.0) NA NA 09/15/93 170 - ND(1.0) ND(1.0) 3.2 .; 2.3 15 NA NA ' 03/07/94 300 ND(1.0) 2.8 8.4 5.1 30 NA NA, 08/30/94 ND(50) ND(1.0) ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA NA 12/08/94 ND(50) ND(0.4) ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA NA 03/22/95 ND(50) ND(0.4) ND(0.5) ND(0.5) ND(0.5) ND(0.5) ND(0.001) NA ' =06/23/95==81==ND(0:4)==ND(0:5)==ND(0:5)==ND(0:5)==I=1=ND(0:003) =NA= 10/10/95 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) ND(0.002) NA 01/18/96 ND(50) ND(0.05) ND(3.0) ND(3.0) ND(3.0) ND(3.0) ND(0.002) NA ' 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(0.5) 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 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(0.5) ND(0.5) NA NA 10/31/97 ND(50) NA 1.1 ND(0.5) ND(0.5) ND(0.5) NA NA 01/22/98 ND(50) NA 2.2 1.3 0.51 0.92 NA NA ' 04/16/98 ND(50) NA 1.9 4.1 0.7 2.9 NA ND(5.0) 07/17/98 ND(50) NA 0.96 ND(0.5) ND(0.5) 0.55 NA ND(5.0) 10/20/98 ND(50) NA 1.6 ND(0.5) ND(0.5) M(0.5) NA ND(5.0) . ' 01/21/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 04/30/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) .07/07/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 10/21/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 0I113100 ND(50) NA ND(0.5) ND 0.5 ND(0.5) ND(0.5) NA ND(5.0) MW-2-P . 09/29/92 460.. . : ND(10). .,, . ,.:3.3 ND(1.0) ND(1.0) ND(1.0) .,:.:. NA NA::. . 09/15/93 510 ND(LO) 1I 1.8 ND(i.0)` 4.9 NA NA 03/07/94 03/07/94 360 ND(1.0) 4.8 12 6.8' 40 NA NA 08/30/94 560 ND(1.0) 4.1 1.0 IA ND(0.5) NA NA I2/08/94 430 ND(0.4) 26 . 1.9 7.5 . 1.7 NA NA 03/22/95 250 ND(0.4) 11 0.64 2.8 ND(0.5) ND(0.001) NA 06/23/95 1,700 ND(0.4) 98 6.0 45 3.5 ND(0.003) NA 10/10/95 530 ND(I0) 51 .:. 4.1 24,: 3.0 ND(0.002) NA- 01/18/96 780 ND(0.05) 98 6.8 35 5.1 ND(0.002) NA 041261196 1,000 ND(0.05) 120 7.5 48 13 ND(0.002) NA 07/19/96 190 ND(0.05) 13 1.7 3 1.5 ND(0.003) ND(5.0) 10/30/96 1,300 ND(0.05) 160 16 9.8 10 ND(0.002) ND(5.0) 01/24/97 930 NA 100 6.3 ND(0.5) 20 NA NA _ -----04/2l/97--3,300 SNA= - 460 -22.- -150 _48� --:NA- �--ND(5.0)= 07/30/97 15,000 NA 350 ND(0.5) ND(0.5) ND(0.5) NA NA 10/31/97 1,000 NA 150 9 21 19 NA NA µ 01/22198 2,500 NA 310 19 51 49 NA NA' 04/16/98 3,900 NA 750 28 130 10 NA 85 07/17/98 3,100. -NA 490 16 140 30 NA ND(5.0) 10/20/98 3,700 NA 650 15 55 16 NA ND(5.0) 01/21/99 390 NA 18 2.7 ND(0.5) 12 NA ND(5.0) 04/30/99 ND(50) NA ND(0.5) ND(0.5) ND(0.5) ND(0.5) NA ND(5.0) 07/07/99 970 NA 51 8.2 2.9 5.8 NA 7.6 10/21/99 920 NA 11 10 0.99 3.4 NA - 12 01/13/00 560 NA 4.0 6.2 ND(0.5) ND(0.5) NA ND(5.0)