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Table 2 Groundwater Elevation Analytical Data Chevron Service Station#9-4275 2905 Benjamin Holt Drive Stockton,California Well Groundwater Depth Ethyl- Xylenes Well Date Elevation Elevation to Water TPHg Benzene Toluene benzene (total) MtBE ID Sampled (ft,MSL) (ft,MSL) (ft roc) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) MW-2 06/13/00 -637 978 1,77 473 <250 187 31 9 123 (cont) 09/13/00 -834 1175 <50 0 <0 500 <0 500 <0 500 <0 500 820 12/14/00 -792 11 33 67 0° 0 753 <0 500 <0 500 <1 50 145 03/02/01 (S) -637 978 1,400` 25 <50 17 <50 3801410'0 03/02/01 y (K) -637 978 1,800 10 <0 50 16 26 380 05/10/01 -591 932 2,100 13 063 24 34 210 08/21/01 -871 1212 170 <0 50 <0 50 <0 50 0 61 16 12/05/01 -829 11 70 75 <0 5 <0 5 <0 5 0 8 40 03/11/02 -617 958 2,600 8 <05 11 7 240 06/07/02 -698 1039 1,700 5 <0 5 3 4 130 09/24/02 -912 1253 170 <05 <05 <05 <0 5 7 12/17/02 -818 1159 140 <0 5 <0 5 3 5 11 MW-3 03/22/89 240 -1411 1651 NO NO NO NO NO -- 06/12/89 -1479 1719 NO NO NO ND NO -- 09/07/89 -1624 1864 ND ND NO NO NO -- 12/18/89 -1538 1778 ND ND NO ND NO -- 03/20/90 -1515 1755 NO NO NO NO ND -- 07/03/90 -1631 1871 NO NO NO NO NO -- 10/19/90 -1723 1963 NO NO NO NO NO 01/17/91 -1694 1934 70 ND ND ND ND 03/19/91 -- -- NO NO NO ND NO 07118/91 -1708 1948 ND ND ND ND NO 10/31/91 -1746 1986 NO NO ND NO ND 01/16/92 -1665 1905 NO NO ND NO 0 9 03/11/92 -1555 1795 -- -- 03/17/92 -1550 1790 ND 07 1 1 NO 0 8 06/29/92 -1705 1945 NO 0 9 NO NO NO 12/10/92 -1767 2007 NO ND ND NO 0 5 02/04/93 -1561 1801 NO ND NO NO NO 05/18/93 -1374 1614 NO NO 0 8 0 7 37 08/05/93 -1460 1700 120 0 5 22 NO 30 - 11/09/93 -1518 1758 NO NO NO NO NO - 01/18/94 -1480 1720 ND ND ND ND NO 06/27/94 -1410 1650 NO ND NO NO ND - 09/29/94 -1530 1770 NO NO NO NO NO 4 Chevron1942751QMR19 4275 NF