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11-Apr-03 <br /> LCL <br /> O <br /> EXPLANATION O M <br /> Shell groundwater monitoring well O O co <br /> MW-10 MW-9 Tosco groundwater monitoring well 0 <br /> -9.73 -9.94 �7 Destroyed Tosco groundwater monitoring well <br /> (<0.50) (<0.50) Groundwater elevation contour in feet <br /> (<2•0) (30) referenced to mean sea level(ft msl). Arrows V <br /> - S-5 indicate approximate groundwater flow C 00 <br /> -10.03 direction. O V <br /> ELMWOOD AVENUE W leo (<20) S-� -- <br /> � \� (12,000) -10.05 "9.78 Groundwater elevation in ft msl � �p <br /> (<0.50) (7.4) Benzene concentration in parts per billion (ppb) <br /> Z (840) (400) MTBE concentration in ppb O <br /> �-+ <br /> x (<0.501<5.0, 18-Feb-02) Benzene/MTBE concentrations in V <br /> -13 ppb,date last sampled <br /> -9.89 ! <x Not detected at reporting limit x <br /> Waste Oil (<50) W <br /> APN <br /> UST \ (13,000) * 113-042-1 AP- NA Not available <br /> � Auto MW-11 <br /> i Auto Service -13.63: 113-042-2 Approximate hydraulic gradient=0.002 <br /> <0.50); <br /> i Service F-1 MW-$ ` { 130) I *Not used in contouring <br /> Former❑1 1 <br /> -9.60 <br /> UST Pit�ll 11 (<0.50) � � : APIV <br /> 113-042-3 APN <br /> � S-3 <br /> -9.94 <br /> (<100) 113-042-4 <br /> C:0 a <400J (<0.50) <br /> -9.58 Dispenser - (<5-0) Q <br /> i (<0.50) Islands <br /> (130) I MW-3 I C'� <br /> O I -9.68 I © m <br /> Tosco Station I (<,-00) I � r� Former Waste <br /> (<400) I i L J oil UST Q <br /> iKiosk L----J Former USTs j JI S-1 V <br /> FTFormer\ S-2�� I I ` -9.94 <br /> ❑p UST Pit -9.78 99 (34) <br /> J (7.4) I I (c5.0) <br /> O MW-12 400 l - J <br /> ❑ 3 USTs MW-2 -8.66' er ( ) <br /> U (d.5) r——J ` I Dispenser Former Bank of <br /> ch APN APN <br /> 1 (220) p the West Branch <br /> a a i island 113-042-14 113-042-13 <br /> I <br /> Dispenser (Typ.of 3) �r Former UST <br /> MW-6 Islands !I ---I , Former Shell Service Station <br /> -9.47 MW-1 <br /> 1 <br /> L --- — — (<0.50) -9.59 <br /> ------- -------- ------------ -- - <br /> (<Z'0) - (<2S) - -9.79 Sidewalk O <br /> (�oJ `° (<0.50) <br /> (<5.0) ++ <br /> N <br /> COUNTRY CLUB BOULEVARD Q. v <br /> �i m <br /> V/ 0 <br /> m <br /> MW-8 .5 <br /> -9.43 � U o <br /> (<0.50) Scale(ft) �'U <br /> (<2.0) FIGURE <br /> 4) p C <br /> a zo ao so � � v Y <br /> >` C.) <br /> - <br /> M O a <br /> L1. r cn <br />