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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH 6 T E X MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/1) (ug11) (ug11) (ugll) (ugll) (ugll) (ugll) (ug1l) (ugll) (ppm) MONITORING (Feet) (Feet) (Feet) MW-6 04/25/94 356 1673 -1317 53 - -- ND<O 5 ND<0 5 06 24 65 {c) 20 PACE MW-6 07/28/94 356 1720 -1364 69 --- --- ND<O 5 ND<O 5 ND<O 5 ND<0 5 -- -- 22 PACE MW-6 12/09/94 356 1770 -1414 ND<50 — -- ND<0 5 ND<O 5 ND<O 5 ND<1 — --- 35 PACE MW-6 03/03/95 356 1634 -1278 ND<50 (e) - -- 083 ND<O 50 ND<O 50 ND<1 0 — --- 43 ATI MW-6 04/12/95 356 1505 -1149 57 -- -- ND<O 50 052 ND<0 50 ND<1 0 --- — 46 ATI MW-6 07/20/95 356 1537 -1181 ND<50 --- — ND<O 50 ND<O 50 ND<0 54 ND<1 0 --- --- 73 ATI MW-6 11/02/95 356 1624 -1268 ND<50 -- -- ND<0 5 ND<O 5 ND<O 5 ND<1 0 65 — 43 ATI MW-6 01/16/96 356 1565 -1209 ND<50 -- -- ND<O 50 ND<O 50 ND<0 50 ND<1 0 89 -- --- ATI MW-6 04/22/96 356 1353 -997 ND<50 — --- ND<O 5 ND<1 ND<1 ND<1 58 --- -- SPL MW-6 07112/96 356 1385 -1029 ND<50 --- -- ND<O 5 ND<1 ND<1 ND<1 62 -- 33 SPL MW-6 11/14/96 356 1475 -1119 80 -- --- ND<O 5 ND<1 0 ND<1 0 2 1 64 — 39 SPL MW-6 03/11197 356 1174 -818 120 - -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 130 -- 39 SPL MW-6 05/22/97 356 1234 -878 100 -- -- ND<O 5 ND<1 0 ND<1 0 ND<1 0 57 37 SPL MW-6 08/06/97 356 1320 -964 — -- --- --- -- - -- -- -- 62 --- MW-6 09/22/97 356 1331 -975 ND<50 -- --- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 -- 63 SPL MW-6 01/07/98 356 1344 -988 ND<50 — --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 17 --- 59 SPL MW-6 07/01/98 356 959 -603 60 -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 130 --- 54 SPL MW-6 09/18/98 356 1131 -775 50 — --- ND<O 5 ND<1 0 ND<1 0 ND<1 0 74 — 57 SPL MW-6 01/19/99 356 1181 -825 ND<50 - ND<1 0 ND<1 0 ND<1 0 ND<1 0 45 --- -- SPL MW-6 10/14/99 356 1332 -976 ND<50 --- -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 29 - -- SPL MW-6 01/20/00 356 1277 -921 ND<50 — — ND<0 5 ND<O 5 ND<O 5 ND<O 5 33 — PACE MW-6 05/04/00 356 948 -592 140 -- — ND<O 5 ND<O 5 ND<O 5 ND<O 5 710 -- -- PACE Blaine Tech Services Inc, Report 000504-S-1, BP Oil 11193 at 3202 W Hammer Lane,Stockton California Page 7