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- 15 Nov44 <br /> - EXPLANATION <br /> HAMMER LANE Groundwater monitoring well <br /> �7" Destroyed groundwater monitoring well <br /> Q Product dispenser number <br /> - MW4 Former UST <br /> -3704 Location MW-5 Groundwater elevation contour in feet <br /> (NA) _ c;� _-37 31 _ _ referenced to mean sea level(ft ms)) Arrows <br /> `(<0 50) - J J y N J J_ - (NA) -'T'- indicate approximate groundwater flow <br /> <0 50) X, direction <br /> -3140 Groundwater elevation in ft msl <br /> f <br /> Propane Tank (<0 50) Benzene concentration in parts per <br /> - f billion(ppb),date last sampled <br /> MW-3 st MW-2 Wooded (<0 50) MTBE concentration in ppb <br /> .3691 Exttm �, -37.22 , MW-8 field <br /> (NA) USTs , (NA) Geo -37.40 <x Not detected at reporting limit x <br /> (63) (33) (<0.50) <br /> MW-7 (<0 50) Approximate hydraulic gradient= 0 005 <br /> -36.79 j <br /> (<0 50) to 0 0 11 <br /> (<0 50) _9 <br /> _ r Canopy and <br /> -3720 <br /> Dispenser Islands Building (<0.50) <br /> ® ® ® U© (95) 1 <br /> N <br /> S� -N- <br /> PW--1 <br /> y � � <br /> MW-6 <br /> -3713 see I"} <br /> (NA) Waste Oil W E <br /> (2 5)L Tank o 20 40 so <br /> _ -------------- — - - -- — --—-- <br /> Domestic well FIGURE <br /> - - 160 feet <br /> S 2 <br /> 0 <br /> Shell-branded Service Station Groundwater Contour/ <br /> 7700 Moreland Street © Chemical Concentration Map <br /> Stockton, California <br /> C A M B R I A September 13,2004 <br />