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! Page 32 of 35 Table 1 Groundwater Elevation and Analytical Data MARCO Service Station#2133 2908 Benjamin Holt Dr,Stockton,CA I Well Depth Product , Groundwater Groundwater Xylenes Well Date Elevation to Water Thickness Elevatikon Elevation TRH Benzene Toluene Eth !benzene 9 y (total) MtBE DO Number Sampled (ft,MSL) (ft,TOC) (ft) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mgIQ 11 if MW-2 11/10/93 2 88 1689 -- -1401 - 950 67 72 6 6 120 3121194 16 44 -- -13 56 0 45 450 100 6 2 16 83 .. — 6127194 1629 -- -13 41 015 390 55 13 9 6 72 - 9129194 _ _ - 12/8/94 1543 -- -1255 -- 580 29 27 62 130 -- 3/8/95 254 1297 -. -1009II 246 3,800 180 42 6/1/95 89 370 -. - - 9/11/95 1374 — -1120 4,100 290 51 140 170 1215195 1 15 1410 -12 95 -175 -- 3118196 8 60 -745 550 4,800 250 18 56 280 -- -- 6/18/95 961 -846 -101 __ __ 9/25/96 1220 -1105 -259 120 2 7 <0 5 3 18 <5 1214196 1178 63 042 -- 3119/97 P 7 33 i, 1 -618 4 45 510 17 0 89 31 4 4 0 3 615197 P 8 83 -- I' -768 -1 50 -- -- -- - 0 4 8119197 NP 1033 -- .9 18 -150 2,400 17 <5 <5 260 50 0 3 11/25/97 P 1054 -- -939 -021 .. ._ < _ 3/19/98 P 427 -- -312 627 310 36 <0 5 2 4 <0 5 <5 5 5 6124198 6 41 -526 -214 -- __ _- 9/10198 P 804 -- -6 89 -163 157 0 783 <0 5 <0 5 0 604 <5 12/17/98 812 -697 -008 - 3/10/99 P 595 .. -480 217 <50 <0 5 <0 5 <05 <05 <5 6 4 6/22/99 7 98 -683 -203 -- 4 1 2115199 13199 NP 9 62 - -8 47 -164 <50 <0 5 <0 5 <0 5 <0 5 <5 1 5 9 54 - -839 008 -- -- -- 0 6 3123100 P 486 -- -371 468 <50 <0 5 <0 5 <0 5 <0 5 <2 5 5 0 6/21/00 7 12 -- -5 97 -226 19 9/13100 NP 8 87 -- -772 -175 <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 65 12/15/00 833 -- -718 054 -- -- 1 76 312/01 P 630 -5 15 2 03 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 42 5/10/01 636 -521 -006 -- .. 8/22101 P 12/5/01 P 910 I-7 95 -274 <50 <0 50 <0 50 <0 50 <0 50 <2 5 827 -712 083 3112102 P 6 53 -' .538 174 <50 <0 50 <0 50 <0 50 <0 50 <2 5 1 43 6/6/02 744 — �-6 29 -091 — -- — — — — 067 i Projects&/2133/Reports/Tables/gwtables2133)ls I