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Tab Palk 31 Groundwater Elevation and Analytical Data ARCO Service Station#2133 2908 Benjamin Holt Dr,Stockton,California Well Depth Product Groundwater Groundwater Total Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MtBE DO Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) mg/I E-7 2122190 -- .. - -- (cont) 318190 1570 -- -1454 -- 137 1 5 0 8 1 4 4/5/90 1588 -1472 -018 - - 4/19/90 1600 -- -1484 -012 - - - 5110190 1630 - -1514 -030 5124190 1628 - -1512 002 - 615/90 -- -- - 6118/90 Dry - -- 7/12190 1703 -1587 -- 8116/90 1712 - 1596 -009 - 9/17/90 1772 -- -1656 -060 - -- - 9/18/90 1772 -- -1656 000 1,100 100 12 4 5 28 10/11/90 1776 -- -1660 -004 - - - 12/6/90 -- - -- -- - - - 2/12/91 1728 -- -1612 - 840 33 8 7 2 21 2125/91 17 22 -- -1606 006 -- - - -- - 4/23/91 1633 -1517 089 - - 7/16/91 1865 -- -1749 -232 - - - - 10/8/91 1900 - -1784 -035 - - - 1/22/92 1775 -- -1659 126 860 28 1 2 2 1 2 3 4/22192 1681 -- -1565 0 94 500 <2 1 <3 2 <1 9 <1 9 7/29/92 1827 - -1711 -146 - - -- -- - 10/29/92 -- -- -- -- -- - 1/27/93 1548 -1432 -- 660 <5 27 1 6 2 9 4/29/93 1373 -1257 175 450 <3 4 <3 1 <2 0 <0 9 815/93 1543 -1427 .170 360 <5 <3 2 9 0 9 11110/93 1567 -- -1451 -024 150 1 6 0 6 1 4 0 6 3/21/94 1509 - -1393 0 58 68 2 9 1 4 0 8 3 4 6127/94 1486 -1370 023 180 <0 3 <0 3 3 9 0 8 9129194 1605 -- -1489 -119 <50 <0 5 <0 5 <0 5 <0 5 12/8/94 1565 - -1449 0 40 <50 <0 5 <05 <0 5 <0 5 318195 1301 -11185 264 <50 <0 5 <0 5 <0 5 <0 5 6/1195 1169 — -1053 132 67 <0 5 <0 5 3 5 1 2 9/11/95 1385 -- 1269 -216 75 <0 5 <0 5 0 5 <0 5 12/5195 1420 -- -1304 035 -- -- -- - - 3f18/96 918 -- -802 5 02 <50 <0 5 <0 5 <0 5 <0 5 - 6/18/96 1000 -884 -082 - -- - - - 9/25/96 1247 -- -1131 -247 56 <0 5 <0 5 <0 5 <0 5 <5