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TABLE i-SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G B T E X ID SAMPLING/ ELEVATION (a) WATER ELEVATION MTBE DO LAB MONITORING (Feet) (Feet) (b) (ug/1) f�9A) (U9A) (Feet} (ug/0 (ugA) (ug/1) (ppm) MW-7 815/91 6.21 30.82 -24.61 70 19 ND ND ND MW-7 8115/91 6.21 --- --- - PRE PRE MW-7 1219191 6,21 31.36 -25.15 ND 19 ND 1.2 ND MW-7 319/92 6.21 30.15 -23.94 ND ND PRE Nb ND ND PRE MW-7 6119/92 6.21 30.19 -23.98 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- MW-7 9118/92 6.21 31.98 -25.77 90 ND<0.5 ND<0.5 ND<0.5 ND<0.5 -_ - ANA MW-7 12/9/92 6.21 32.33 -26.12 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - ANA QC-1 (d) 1219192 --- _-- - ANA -- ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ANA MW-7 3111193 6.21 29.85 -23.64 110 3.1 0.8 2.2 1.4 - - MW-7 6115/93(d) 6115193 0.8 2.8 2.4 6.21 27.74 21.53 71 1.4 -- - PACE ___ QC-1 120 1,9 ND<0,5 5.9 4.6 --- MW-7 9/15/93 6.21 28.16 -21.95 170 1.2 ND<0.5 5.8 2.5 - - PACE PACE QC-1 (d) 9115193 --- --- -- 160 1 ND<0.5 5.5 2.6 -~- PACE MW-7 12/22/93 6.21 28.03 -21.82 110 1.9 1.3 3.8 10 -- PACE MW-7 411194 6.21 27.15 -20.94 340 2,5 1 -- - PACE QC-1 (d) 4/1194 -- 30 43 ___ 3.8 PACE - 330 2.6 0.9 28 42 PACE MW-7 7127/94 6.21 27.21 -21.00 72 ND<0.5 ND<0.5 ND<0,5 ND<0.5 - __ MW-7 11/30/94 6.21 27.58 -21.37 140 ND<0.5 0.8 4.4 8.3 -- 2.9 PACE QC-1 (d) 11/30/94 -- _ 3.8 PACE 140 0.6 1 5 9.3 MW-7 2/15/95 6.21 26.58 -20.37 PACE 90 ND<0.50 ND<0.50 2.1 1.7 -- MW-7 4121195 6.21 24.61 -18.40 53 3.4 ATI 0.65 NfJ<0.50 1.4 1.44.9 ATI MW-7 7119195 6.21 23.74 -17.53 81 0.59 ND<0.50 0.55 ND<1.0 -- QC-1 (d) 7119/95 __- --- 5.4 ATI _ MW-7 (e) 10/20/95 6.21 24.15 17.-- 82 ND<0.50 ND<0.50 0.54 ND<1.0 --� -- ATI 11D ND<4.50 ND<0.54 ND<0.50 ND<i.0 160 MW-7 10 6.21 -- 5.4 ATI MW-7 (e) 412319623196 -- 89 ND<0.50 ND<0.50 ND<0.50 ND<1.0 110 5.2 ATI 6.21 20.78 -14.57 ND<500 ND<0.5 ND<0.5 ND<0.5 ND<0.5 15D MW-7 4/23196 6.21 _-- - SPL ND<500 ND<0.5 ND<0.5 ND<0.5 ND<0.5 160 SPL MW-7 7/12/96 6.21 21.18 -14.97 ND<50 ND<0.5 ND<1 ND<1 ND<1 ND<10 5.9 QC-1 (d) 7/12/96 --_ --_ SPL -- ND<50 ND<0.5 ND<1 ND<1 ND<1 ND<10 SPL MW-7 10/18/96 6.21 20.70 -14.49 220 ND<0.5 ND<1.0 ND<1.0 ND<1.0 200 5.3 SPL QC-1 (d) 10/18/96 - -- 240 ND<0.5 ND<i.0 ND<1.0 ND<1.0 200 MW-7 2126/98 6.21 13.00 -6.79 SPL 120 ND<0.5 ND<1.0 ND<1.0 ND<1.0 95 4.5 SPL MW-7 717198 6.21 12.20 -5.99 1800 ND<0.5 ND<1.0 ND<1.0 ND<1.0 2400 3.5 SPL MW-7 1/19199 6.21 14.33 -8.12 3200 ND<1.0 ND<1.0 ND<i.0 ND<i.0 3800 MW-7 (h) 7114199 6.21 13.13 -6.92 _ - SPL MW-7 7/26199 6.21 13.30 -7.09 21000 ND<1.0 ND<1.0 7.2 2,4 18000 ___ -- SPL Blaine Tech Services, Inc., Report 990714-M-2,BP Oil 11192 at 1403 Country Club Blvd.,Stockton,California Page 6