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<br /> Groundwater Monitoring Data and Analytical Results
<br /> Former Unocal Service Station#2859
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<br /> 1665 Pacific Avenue N
<br /> Stockton,California
<br /> WELL ID/ DATE UM GWE ITH(G) B T E X MTBE
<br /> TOC*__ (ft-) (msl) (Ppb) (Ppb) (PPb) (Ppb) (ppb) (PPB)
<br /> MW-2 08/18/92 DRY -- -- -- -- -- -- --
<br /> (cont) 11/13/92 DRY -- -- -- -- -- --1019 03/26/93 4835 -3816 480,000 14,000 75,000 6,500 37,000 --
<br /> 06/04/93 4655 -3636 170,000 15,000 65,000 5,000 24,000 --
<br /> 11/12/93 4678 -3659 130,000 14,000 27,000 7,000 28,000 --
<br /> 02/18/94 4482 -3463 200,000 25,000 67,000 5,000 28,000 --
<br /> 05/23/94 4361 -3342 130,000 27,000 68,000 5,400 29,000 --
<br /> 08/12/94 4538 -3519 180,000 15,000 62,000 5,300 29,000 --
<br /> 11/08/94 4557 -3538 120,000 12,000 61,000 6,000 28,000 --
<br /> 02/07/95 4328 -3309 120,000 13,000 60,000 5,500 29,000 --
<br /> 05/04/95 3978 -2959 170,000 20,000 54,000 4,400 23,000 -
<br /> 08/10/95 -- -- -- -- --1008 08/26/95 3989 -2981 140,000 4,400 63,000 5,400 28,000 --
<br /> 11/09/95 3955 -2947 140,000 6,400 45,000 5,600 29,000 -
<br /> 02/08/96 3703 -2695 280,000 3,500 100,000 9,200 52,000 --
<br /> 05/08/96 3359 -2351 180,000 1,900 46,000 4,200 25,000 ND
<br /> 08/07/96 3429 -2421 290,000 3,200 52,000 8,900 38,000 ND
<br /> 11/14/96 3441 -2433 180,000 4,200 50,000 9,900 39,000 ND
<br /> 02/14/97 3070 -2062 110,000 1,500 29,000 4,100 20,000 ND
<br /> 05/07/97 2897 -1999 77,000 1,200 28,000 3,900 18,000 ND
<br /> 03/06/98 2697 -1689 80,000 780 15,000 3,000 14,000 'ND/ND'
<br /> 06/18/98 2407 -1399 90,000 1,600 19,000 4,400 21,000 3ND/214
<br /> 08/31/98 2485 -1477 83,000 1,000 12,000 4,000 18,000 3ND/ND 4
<br /> 12/04/98 2474 -1466 74,000 1,500 15,000 4,300 19,000 3ND/ND 4
<br /> 02/01/99 2423 -1415 -- -- -- -- --
<br /> 02/04/99 2406 -1398 50,000 2,200 23,000 4,100 22,000 --IND 4
<br /> 944 03/12/99 2325 -1381 82,000 2,400 16,000 4,200 21,000 ND'
<br /> 05/24/99 2248 -1304 33,000 4,900 2,500 1,800 6,400 950
<br /> 08/19/99 2381 -1437 83,00010 1,800 16,000 3,600 17,000 ND
<br /> 11/22/99 2485 -1541 21,00010 1,000 4,600 2,800 9,400 ND
<br /> I
<br /> 2859 xlsl#280054 3 As of 08/07/00
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