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23 Apr-02 <br /> O o <br /> EXPLANATION a.. <br /> Shell groundwater monitoring well (D 0 <br /> MW-20B 3 <br /> Adjacent site groundwater monitoring well NA W -# <br /> L CO <br /> F7-*- <br /> Destroyed groundwater monitoring well �� + (��5) MW-11A 50) 0 C <br /> Groundwater elevation contour in feet referenced J MW-20A — 1 1 -15.02 V <br /> to mean sea level(ft msl) Arrows indicate { j -13.79 1 — h (<0 50) 1 C <br /> / approximate groundwater flow direction ( (<0 50) r�1 (<O 5) C O <br /> -1253 Groundwater elevation in ft ms] 0 J {<0 5) J� Former Station <br /> L _11B D V <br /> ! Service S >L <br /> (<0.50) Benzene concentration in parts per billion(ppb) — — � � 1INA J 0 <br /> (<0 50) <br /> (<0 50) MTBE concentration in ppb f I (<O 5) Rl <br /> <x Not detected at detection limit x MW-19C W l <br /> 1;1.9 <br /> Beacon NAA I <br /> O � V <br /> NA Not applicable-well screened in a deeper Savemart ,.� (<O 50) <br /> water-bearing zone W-lA MW-7g 14I 4)) <br /> Note All analyses by EPA Method 8260 Chevron wells gauged W-11J 0 50) _) f MW-3 * MW-4 5.39 At <br /> on January16,2002 and sampled on January 16 and 17,2002 -15 91 14 9 2 -10.5) <br /> P �'Y (<0.5) Q �(<0 50) 1'4 98" (<0.57 N <br /> Because the Shell and Chevron sites were gauged on different J 1 l (13) � (CL•5)a- {33) MW-2 <br /> days,a contour map was not prepared Arco Station MW-7 J (25,000)� -4 -15.42 <br /> -14.74r MW- MW-5B 41.50) A< <br /> * Extraction wells are not used in contouring 1 II (�6� -15.68 J NA�� , 3 (<O 50) a j <br /> �I-3 "A-zA W-2B J B 0 (<o s) <br /> W-z -NI -3M�1.2 — Ex-3 <br /> f MW-5A -15.62 MW-1^ MW-13 <br /> -15.34 (<0.50)=-16.33 -1570 Q <br /> (180) (<0.50) (<0.50) <br /> �<O 5) MW-14(EX-2)* (2) (<O 5) m <br /> -15.09 <br /> WEST KETTLEMAN LANE (<O 50) <br /> (<O 5) Q <br /> MW-8s U <br /> NA MW-9A <br /> W MW-6 (<0'50) -16.46 <br /> CrW-8 -15.24 (<0 5) (<O 50) MW-12A C <br /> NV-7 — (41.50 MW-8A (3) -1536 0 <br /> — -{I 6)_ — -8B-- -15 41_ <br /> r <br /> i (<0.50 <br /> <0 5 <br /> (MW-5 NIN -2 NA (<0.50) 12 <br /> -15.23 ( 00) (<O 5) <br /> ( 5) .50)(<0.50) MW-9B J (<0 5)�AB�- <br /> (<0 50) NA Qv/�1 <br /> r (<0•5) <br /> J 1 r J I (<O 5) J ^ <br /> NIW-4 J J C <br /> Jj s� CD <br /> -l2 J vo9 Golden Ox J J J 3 <br /> J +MW-8 � Restaurant J J J D. <br /> O <br /> J -15.37 J d <br /> ' t4M(<0.50) J MW-17B c w <br /> (<0 50) f f NA MW-10B J G <br /> Scale(n) NA <br /> W- J �, Sj M NA ac (<0.50) L <br /> D 30 60 120 �1 J U <br /> 0 5} J -0 E <br /> JTYI-4 (<0.50) -10A C <br /> J (<o s) - J Y o <br /> f Municipal Water Well Shell-branded J (41.50) I FIGURE Q v; <br /> (Independent) (<O 5) 3 'V <br /> Service Station J J dL <br /> U) �' U <br /> o $ <br /> CIJ 0 <br /> 1 <br />