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Table 1 Groundwater Elevation and Analytical Data Former ARCO Service Station No 4493 205 N Center Street, Stockton, CA Measured Calc TOC Depth to Ethyl- P! ProductThl GW GRO Benzene Toluene Xylenes MTBE DD Well No Date NP Elevation Water ckness Elev (ligIL) (Ng1L) (Ng1L) benzene (11glL) WIL) (mg/W pH Comments {ft MSL] {ft BGS) {feet] (ft MSL] {P9�1 MW-91VI 6112!2002 P 1298 1924 -624 770 37 8 110 9 44* - 9/1612002 P 1692 392 50 3 <1 0 2 <1 0 56* 1 21512 00 2 P 1825 525 <50 <0 5 <0 5 <0 5 <0 5 24* 2 0311412003 P 1854 -656 <50 <0 50 <0 50 <0 50 <0 50 0 63* 4 74 06/0912003 P 1746 -448 <50 <1 0 <1 9 <1 0 <1 0 1 1* 2 73 09125/2003 P 1855 -557 <50 <1 0 <1 0 <1 0 <1 0 21* 1 72 1212312003 P 1863 565 <50 <1 0 <1 0 <1 0 <1 0 2 0* 370 B3 0310812004 P 1754 -456 <50 <1 0 <1 0 <1 0 <1 0 2 8* 4 7 0 06/09/2004 P 1778 480 c50 <1 0 <1 0 <1 0 <1 0 <1 0* 210 72 Water levels taken on 618104 09/29/2004 P 1941 -643 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 3 7 5 12/2112004 P 1998 -700 260 3 <2 0 <2 0 <20 49 1 80 72 03!0712005 P 1836 - -538 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 34 75 06/1612005 P 1763 -465 <50 <0 56 <0 50 <0 50 <0 50 0 55* 200 72 09/0912005 P 1779 -4131 <50 <050 <0 50 <0 50 <0 50 <0 50* 210 72 1211312005 P 1930 -632 <50 1 2 06 3 0 88* 3 73 03109 O6 P 1686 -388 100 3 6 J <0 50 UJ <0 50 UJ <0 SO UJ 50*J 1 74 f 1512002 P 1064 1596 -532 <50 <05 <0 5 1 <0 5 1* 2 - 14/2003 P 1589 525 <50 <0 50 <0 50 <0 50 <0 50 0 64* 1 74 09120 P 1535 -471 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 1 77 12!2002 P 1076 1493 -417 430 12 1 <0 50 1 5 8* - - 1612002 P 14 81 -0 05 <50 <1 0 <1 0 <1 0 <1 0 2 6* - - 1312005 P 1720 644 75 <0 50 1 <0 50 2 <0 50* 4 74 09/2006 P 1492 -416 89 <0 50 UJ <0 50 UJ <0 50 UJ <0 50 UJ <0 50*UJ 3 73 1212002 NP 1064 1421 -357 87 2 <0 5 <0 5 <0 5 3 1* - NP 1465 -401 <50 <05 <0 5 <0 5 <0 5 1 6* - 09/2512003 P 1566 -502 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 1 74 1212312003 P 1633 -569 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 3 87 03/0812004 P 1544 480 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 3 69 06109/2004 P 1568 -504 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 1 75 Water Levels taken on 6!8104 0912912004 P 1677 -613 <50 <1 0 <1 0 <1 0 <1 0 <1 0* 1 7 3 12121/2004 P 1815 - -751 <100 <1 0 <1 0 <1 0 <1 D <1 0 2 74 03/07/2005 P 1615 -561 <50 <10 06116/2005 P 1537 -473 50 <0 50 <0 50 <0 50 <0 50 <0 50* 1 7 8 09/0912005 P 1554 -490 96[2] <0 50 <0 50 <0 50 <0 50 <0 50* 2 76 1211312005 P 1695 -631 <50 <0 50 2 <0 50 2 <0 50* 2 76 03109/2006 P 1477 -413 1 <50 <0 50 UJ <0 50 UJ <0 50 UJ <0 50 UJ <0 50*UJ - 7 5 4493-Table 1 Page 9 of U SECOR