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i TABLE 1 GROUNDWATER MONITORING AND CHEMICAL RESULTS: FORMER REGAL STATION 603, 6425 PACIFIC AVENEUE, STOCKTON, CALIFORNIA WELL # CASING TOP OF DATE DEPTH TO PROD. VACUUM CORRECTED TOTAL PET. BENZENE TOLUENE ETHYL XYLENES Methyl tert-Butyl DISSOLVED ELEVATION SLOT TOP OF THICK. AT WELL GW ELEV. HYDROCARS BENZENE Ether OXYGEN FEET AMSL FEET AMSL WATER HEAD FT. AMSL GAS-RANGE 6020 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPB PPB PPB PPB PPM MW-4 11.57 -23.43 09/29/93 51.66 0 0.02 -40.13 <50 <0.3 0.5 <0.3 0.9 MW-4 11.57 -23.43 11/05/93 51.3 0 0.00 -39.73 MW-4 11.57 -23.43 12/22/93 50.65 0 0.00 -39.08 <50 <0.5 <0.5 <0.5 <0.5 MW-4 11.57 -23.43 02/10/94 50.68 0 0.02 -39.13 MW-4 11.57 -23.43 03/04/94 50.28 0 0.02 -38.73 MW-4 11.57 -23.43 03/29/94 48.65 0 0.02 -37.10 1 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 (14/26/94 49.16 0 0.01 -37.60 MW-4 11.57 -23.43 05/19/94 49.44 0 0.01 -37.88 MW-4 11.57 -23.43 06/22/94 47.57 0 0.01 -36.01 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 08/17/94 49.76 0 0.01 -38.20 MW-4 11.57 -23.43 09/14/94 48.56 0 0.00 -36.99 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 10/26/94 48.72 0 0.00 -37.15 MW-4 11.57 -23.43 12/16/94 48.38 0 0.00 -36.81 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 01/25/95 47.85 0 0.00 -36.26 MW-4 11.57 -23.43 0 /15/95 46.87 0 0.00 -35.30 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 04/12/95 46.63 0 0.00 -35.06 CZ MW-4 11.57 -23.43 05/17/95 45.7 0 0.00 -34.13 MW-4 11.57 -23.43 06/21/95 45.34 0 0.00 -33.77 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 00/01/95 45.82 0 0.00 -34.25 MW-4 11.57 -23.43 09/26/95 45.8 0 0.002 -34.23 MW-4 11.57 -23.43 10/17/95 45.42 0 0.00 -33.85 } MW-4 11.57 -23.43 11/14/95 45.6 0 0.00 -34.03 MW-4 11.57 -23.43 12/12/95 44.47 0 0.01 -32.91 <50 <0.5 <0.5 <0.5 <2 MW-4 11.57 -23.43 01/22/96 43.8 0 0.05 -32.28 MW-4 11.57 -23.43 03/06/96 42.54 0 0.00 -30.97 <50 <0.5 <0.5 I <0.5 <2 MW-4 11.57 -23.43 04/09/96 41.22 0 0.05 -29.70 MW-4 11.57 -23.43 05/20/96 40.25 0 0.05 -28.73 MW-4 11.57 -23.43 06/2U/96 40.12 0 0.00 -28.55 <50 <0.5 <0.5 <0.5 <2 <50 1.4 MW-4 11.57 -23.43 07/30/96 40.9 0 0.00 -29.33 MW-4 11.57 -23.43 09/19/96 41.45 0 0.00 -29.88 <50 <0.5 <0.5 <0.5 <2 <5 MW-4 11.57 -23.43 12/10/96 39.82 0 0.00 -28.25 MW-4 11.57 -23.43 03/18/97 37.36 0 0.01 -25.80 <50 <0.5 <0.5 <0.5 <2 7 ND <5 MW-4 11.57 -23.43 06/11/97 37.24 0 0.00 .-25.67 MW-4 11.57 -23.43 09/23/97 rim nm rim MW-4 11.57 -23.43 12/16/97 37.13 0 0.00 -25.56 '+ #£c0,;.l`i^ �'a , � ND MW-4 11.57 -23.43 03/11/96 34.32 0 0.00 -22.75 <5 0.1 MW-4 11.57 -23.43 05/28/9a 32.47 D 0.00 -20.90 <50 <0.5 <0.5 <0.5 <2 <5 qAs.t. $ 1 � lenes =r � tJ1f1'aslm. .+ 'n�. S` � �e�� 1 . maim