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i Page 22 of 34 Table 1 Groundwater Elevation and Analytical Data MARCO Service Station#2133 2908 Benjamin Holt Dr,Stockton,CA Well Depth Product Groundwater Groundwater Xylenes Well Date Elevation to Water Thckness Elevation Elevation TPHg Benzene Toluene Ethylbenzene (total) ME DO Number Sampled (ft,MSL) (ft,TOC) (ft) Itt,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg1L) E-12 1215101 P 911 — -715 078 <50 <0 50 <0 50 <0 50 <0 50 <2 5 062 (cont) PR-1 8/26/88 080 -- -- -- <0 5 <0 5 <0 5 <0 5 -- - 11/28/88 -- -- -- -- 64 29 107 444 2127/89 - - - -- <0 4 <0 5 <0 5 <0 5 5130189 -- -- - -- -- <0 5 <0 5 <0 5 <0 5 -_ - 8122189 -- -- - <0 5 <0 5 <0 5 <0 5 1214/89 -- -- - -- -- <0 3 <0 3 <0 3 04 -_ 1/4/90 1641 — -1561 -- — - -- 2/1/90 1614 -- -15 34 027 2115/90 1612 - -1532 002 -- - -- -- -- _- 4 2122190 1694 -1614 082 -- -- 3/8/90 1590 -- .1510 1 04 -- <0 5 <0 5 <0-5 <0 5 -- - 4/5/90 1606 -- -1526 -016 -- -- 4/19/90 1612 -- -1532 -006 5/10190 1659 -1579 -047 5/24/9011 57 -- -1577 F1 — -- 7� 0 02 I� y _- -- -- - 8/5/90 __ _ ' - -- — — 6/18/90 1695 -- -1615 -- <0 5 <0 5 <0 5 <0 5 -- 7/12/90 1736 -- -1656 -041 8116/90 1762 - -1682 -026 -- -- -- -- -- 9/17/90 1793 -1713 -031 <50 <0 5 <0 5 <0 5 <0 5 — 9/19/90 1793 - -1713 000 <50 <0 5 <0 5 <0 5 <0 5 _- 10/11/90 1798 -- -1718 -005 -- -- _ -- 1216190 1783 -- -17 03 015 -- -- 1753 -1753 -- -16 73 030 <50 <0 5 <0 5 <0 5 <0 5 2125191 1747 ``-16674 006 ._ .. — -_- 4/23191 1653 -1573 094 <50 <0 5 <0 5 <0 5 <0 5 - 7/16/91 1618 -17 38i -165 <50 <0 5 <0 5 <0 5 <0 5 -- 10/8/91 1863 -- (-17 83 -045 <50 <0 5 <0 5 <0 5 <06 - 1/22/92 1749 - (-16 89 1 14 <50 <0 5 <0 5 <0 5 <0 5 -- 4/22/92 1690 416101 059 <50 <0 5 <0 5 <0 5 <0 5 -- 7/29/92 1840 -- 176,0 -150 <50 <0 5 <0 5 <0 5 <0 5 10/29/92 1884 -- 4-18 04f -044 <50 <0 5 <0 5 <05 <0 5 - 1/27/93 1616 I -153 268 <50 <0 5 <0 5 <0 5 <0 5 -- Profects/ARCO/2133/Reports/Tables/gwtables2133 As I