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10-Jul-03 <br /> L p <br /> EXPLANATION 0 N <br /> Shell groundwater monitoring well 0 0 r <br /> • O <br /> MW-10 MW-9 Tosco groundwater monitoring well V <br /> �. <br /> -8.79 -9.01 Destroyed Tosco groundwater monitoring well d <br /> (<0.50) (<0.50) #+ <br /> Groundwater elevation contour in feet C13(<2.0) (<2.0) referenced to mean sea level (ft msl). Arrows �: <br /> indicate approximate groundwater flow C O <br /> ELMWOOD AVENUE 9.4.4 0 V <br /> - 0 S-� -9.42 Groundwater elevation in ft msl 0 —6 <br /> \% (<20/12,000,03-.Tan-03) -9.49 0 <br /> (<0.50/840,03-Jan-03) (37) Benzene concentration in parts per billion (ppb) v <br /> Z (NA) MTBE concentration in ppb d <br /> x <br /> (<0.50/<5.0, 18-Feb-02) Benzene/MTBE concentrations in <br /> -9.00 I CY ppb,date Iast sampled <br /> I Waste Oil (<0.50)i \ <X Not detected at reporting limit x <br /> APN\ UST (<2-0) 113-042-1 APN NA Not analyzed <br /> Auto I <br /> i Auto Service MW-11 i 113-042-2 Approximate hydraulic gradient=0.002 <br /> • Service �r! - -11.88 <br /> I <0.50) * Not used in contouring <br /> Former I j� g gg ((rro) \ APN16- <br /> UST Pit\a1 (<0.50) I 113-042-3 <br /> I L (7.6) MW-7 I S-3 APN <br /> i # -8.90 _9.32 113-042-4 <br /> MW-4 a (<50) I (<0.50) <br /> (.72 — <br /> Dispenser „�(<200) I (NA) Q <br /> 19 Islands 1 MW-33 I <br /> . ( ) 1 1 -8.86 1 ; n <br /> I Tosco Station (<5o) 1 I <br /> — (<200) I L J Former Waste <br /> Oil UST + -9.42 <br /> Kiosk (37) <br /> L <br /> i -- Former S-2� I 1 Former USTs <br /> t— p (NA) <br /> ❑O r — UST Pit -9.17 1 <br /> ❑o MW-12 �C — Former NA) -1 <br /> a USTs -8.79 \ Dispenser ( ) <br /> (<0.50) —4J Island Former Bank of <br /> U MW-2 (<2.0) — (Typ. of 3)== the West Branch APN APN <br /> 113-042-14 113-042-13 <br /> Dispenser I Former UST , <br /> MW-6 Islands ————� o Former Shell Service Station <br /> -8.66 17i <br /> (<0.50)— — . 4 <br /> (<2,0) -9.12 Sidewalk <br /> (<0.50) — 0 <br /> •`D (NA) <br /> CI} <br /> COUNTRY CLUB BOULEVARDv <br /> o <br /> [-a- <br /> -MW-8 <br /> m <br /> • <br /> -8.69 0 <br /> (DE <br /> ' <br /> (<2.0) Scale(ft) U) �'-a <br /> FIGURE 16. E U <br /> 0 20 40 BO �j o <br /> Iti <br /> 0 <br /> v CO <br /> 4L N U] <br /> T <br />