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Table 1 Groundwater Monitoring Data and Analytical Results Former Chevron Service Station#9-8632 575 Grant Lane Road Tracy,California WELL IDI TOC* GWE DTW TPH-D TPu.G B T E X MTBE TOG DATE (ft) (ms!) (Jt) (ppb) (ppb) (pp b) (Ppb) (PP b) (pp b) (PP b) (PP b) MW-6B 04/30102'18 25 90 19 24 6 66 <50 <50 <0 5 <0 5 <0 5 <0 5 --1<2' -- 07/30/0219 2590 1989 601 28020 220 <0 5 06 <0 5 12 <2 -' 10/31/0219 2590 2012 5 78 <50 <50 <0 5 <0 5 <0 5 <0 5 <2 -- 01/30/0319 2590 2032 558 49020 <50 <0 5 <0 5 <0 5 <0 5 <2 -- MW-7 041301021718 58 72 -"/<27 2753 19 97 7 56 530 1,300 27 3 07/30/0219 2753 1967 786 <50 430 21 <0 5 75 <0 5 <2 -- 10/31/0219 2753 1978 775 130 690 23 1 85 17 <2 01/3010319 2753 1917 836 96 200 12 <0 5 8 8 <2 — SUMP 01/07/97 -- -- 844 — 260 43 41 2 7 30 <2 5 <1,100 06105197 -- -- 911 <0 5 -- 16 <0 5 <0 5 <0 5 <2 5 <1,100 09/02/97 9 58 -- 061 <OS <OS <05 <2 5 <1,000 -- -- -- <05 <05 <05 <05 <2 5 13,000 823 11/19/97 -- -- -- -- 02/12/98 -- -- 1191 -- -- 21 20 13 26 64 12,0002 06/10/98 8 81 <0 5 <0 5 <0 5 <0 5 <2 5 <5,000 -- -- -- -- <2 5 <5,000 08/10/98 936 <05 <05 <05 <05-- -- -- 1/24198 9 31 -- <0 5 <0 5 <0 5 <0 5 <2 5 <1,000 -- -- -- 03/05/99 -- 889 -- <50 0 911 <0 5 <0 5 <0 5 <2 0 <1,000 06/01/99 -- -- 701 -- 653 2 13 377 0 897 361 942 <5,000 08/30/99 -- -- 921 <50 <0 5 <0 5 <0 5 <0 5 <2 5 <5,000 11/24/99 -- -- 905 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 <5,000 02/03/00 NP -- -- 894 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 0' <5,000 06/26/00 NP -- -- 925 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5 <5,000 08/11/00 NP -- -- 950 <50 057 <0 50 <0 50 <0 50 <2 5 -- 08/22/00 NP -- -- 940 -- -- -- -- -- -- -- <5,000 10/31/00 NP -- -- 917 -- <50 0 <0 500 0 958 <0 500 <1 50 <2 50 <5,000 02/22/01 NP -- -- 890 -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <5,000 9-8632&6855 ID A1*/30/03 I