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1 i � i` Table 1. Water-Level Elevations for ARCO Facility 2093, Tracy, California Top-of-casing Depth-to- Floating Water-level Change since Well number elevation, water, product thickness elevation, last measurement, and date in feet(a) in feet in feetF in feet(b) in feet ATR-I 4/23187 50.58 12.49 38.09 12/22/87 12.63 3795 r 0.14 3/24/88 12.54 -- 38.04 !0.09 6/23188 12.83 -- 37.75 h 0.29 9/29188 13.01 -- 37.57 -0.18 y 2122189 12.46 -- 38.12 "I0.55 6/21189 12.37 -- 38.21 '0.09 9/18/89 12.88 -- 37.70 !0.51 12/27/89 12.68 -- 37.90 0.20 4118/90 12.84 -- 37.74 -10.16 10/16/90 10/19/90 13.10 -- 37.48 :110.26 1/10/91 12.78 37.80 0.32 4/10191 12.52 -- 38.06 0.26 ` 7/10/91 12.95 37.63 0.43 9/24/91 13.30 37.28 -;0:35 1/23/92 12.77 37.81 0.53 4/20192 12.58 -- 38.00 0.19 7/8/92 12.90 37.68 -0.32 10/7/92 13.09 37.49 -0.19 1/18/93 (c) 4/14/93 12.31 -- 38.27 0.78 8/30193 13.18 -- 37.40 -0.87 i 10/27/93 13.13 -- 37.45 0.05 w 2/18194 12.65 -- " 37.93 0.48 5/20/94 12.71 -- i 37.87 -0.06 10/7194 13.14 37.44 -0.43 12/16/94 12.74 37.84 0.4 2/28195 12.65 -- 37.93 0.09 4126195 12.90 -- 37.68 -0.25 7127/95 13.22 -- 37.36 -0.32 10/26/95 13.40 -- 37.18 -0.18 i 2/12/96 12.30 -- 38.28 1.10 ATR-2 4/23/87 49.22 11.28 37.94 -- 12/22/87 11.40 -- 37.82 -0.12 3/24/88 11.35 -- 37.87 0.05 i 6/23188 11.55 -- 37.67 -0.20 9/29/88 11.71 -- s 37.51 -0.16 2122/89 11.35 -- 37.87 0.36 ` 6121/89 11.45 -- 37.77 -0.10 9/18189 11.65 -- I! 37.57 -0.20 12/27/89 11.50 -- 37.72 0.15 4118/90 11.64 - 37.58 -0.14 10/16/90 11.81- -- 37.41 -0.17 10/19/90 11.81 -- 37.41 0.00 i 1110191 11.58 -- 37.64 0.23 4110/91 11.35 -- 37.87 0.23 7/10/91 11.74 -- 37.48 -0.39