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10-oct-03 _ <br /> L o <br /> Cc 0 <br /> EXPLANATION 02 <br /> C C T <br /> Shell groundwater monitoring well O O in <br /> MW-10 MW-9 Tosco groundwater monitoring well V P <br /> L <br /> -10.37 -10.55 Destroyed Tosco groundwater monitoring well <br /> (<0.50) (<0.50) Groundwater elevation contour in feet <br /> (<2 0) 'I (<2.0) �� referenced to mean sea level (ft ms]). Arrows <br /> a indicate approximate groundwater flow = O <br /> S_5 � direction. 0 <br /> U <br /> ELMWOOD AVENUE -10.67 S- -10.49 Groundwater elevation in ft msl <br /> (<20,03-Jan-03) -10.79 {<0.50) Benzene concentration in parts per billion (ppb) V <br /> {<0.50,03-San-03} <br /> (NA) MTBE concentration in ppb <br /> Z (<0.50,03-Jan-03) Benzene concentration in ppb, date <br /> -13 last sampled <br /> -10.49 i V <br /> <0.50 <br /> � Waste Oil � (<0.50) � --el APN ac Not detected at reporting limit x <br /> UST (<2•0) rZ.r 113-042-1- APN NA Not analyzed <br /> Auto MW-11*! �,' 113-042-2 Approximate hydraulic gradient=0.001 to 0.002 <br /> iAuto Service -14.65 <br /> Servicef l # (<2.5) w *Not used in contouring <br /> oMW-5* <br /> l 1 (67) APNFormerl 1 -10.18 113-042-3 <br /> UST Pit"1 I (<0.50) APN <br /> L I (23) S-3 113-0 42 4 <br /> -10.52 <br /> MW-4 a a -10,38 I ( NA) Q <br /> NA <br /> -10.30 Dispenser *(<100)� (+ � <br /> i (<0.0) Islands MW-3 (<400) m <br /> ( ) I -10.36 f <br /> • Tosco Station ——— 1 (<i 0) r-J Former Waste S-1 <br /> ——— <400 Oil UST + -10.66 Q <br /> r ) <br /> 'l —— <br /> �� Kiosk L————J I (63) U <br /> S-2 I 1 Former USTs {NA) <br /> t——— Former -10.47 <br /> — UST Pit <br /> y U5Ts {<10} 1 <br /> MW-12 Former (NA) <br /> 3 -10.25 Dispenser <br /> (<0.50) F—J J Island Former Bank of APN APN <br /> C> MW-2 (<2.0) a — (Typ.of 3) — the West Branch 113-042-14 113-042-13 <br /> Dispenser Former UST <br /> mw-6 IslandsI ———-I Former Shell Service Station <br /> -10.15 MW-1 <br /> (<0.50)— — -10.31 i - <br /> LL. — — — — — — — — —..— — —(<2.5)— S-4 C <br /> (<2.0) <br /> (<IO) -10.49 Sidewalk O <br /> (<0.50) t' <br /> \ (NA) +to+ <br /> t11 <br /> COUNTRY CLUB BOULEVAD v <br /> IRCC; <br /> L N <br /> � O <br /> (n m <br /> MW-8 E <br /> • -10.17 o <br /> (<0.50) <br /> Scale(ft) Cn Z` <br /> (<2.0) FIGURE Q o <br /> 0 20 40 80 00 <br /> U. N <br /> rn <br /> C <br /> I <br />