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EXPLANATION <br /> S-1 * Groundwater Monitoring Well <br /> Groundwater elevation in feet above <br /> -638 Mean Sea Level <br /> Groundwater elevation contours in feet <br /> referenced to Mean Sea Level Arrows <br /> indicate approximate groundwater flow <br /> direction ELMV1pOD AVENUE S-6 <br /> (0 693} Benzene concentrations in ppb <br /> -661 � <br /> <0 <br /> (<2 50) MTBE con ( 500) (� <br /> centrations in ppb I by EPA Method 8020) <2 50) T <br /> S-5 / <br /> -6 76 <br /> < 50a) <br /> Note Groundwater samples collected 31-Aug-99 (<2 50) / <br /> W <br /> Approximate hydraulic gradient= 0 DOS /� <br /> / APN <br /> W / b 113-042-4 <br /> / <br /> d yyy <br /> L7 APN APN APN <br /> 1�j Z 113-042-1 113-042-2 113-042-3 <br /> a S-3 <br /> -638 <br /> (0 693) <br /> *(<2 50) b� <br /> Scale / <br /> _ S-2 <br /> 0 20 40 80 Feet BP/76 -649 J�Former Waste it Tank <br /> 1 inch=40 Feet Service Station y <br /> (100) � �, --T- 5 90 <br /> APN 1(c50 0) --� I (35 5} <br /> I23-232-46 � � <2 50) <br /> Former USTs <br /> _I <br /> Former Banlof <br /> the West Branch <br /> APN APN <br /> Former UST -- / 113-042-14 113-042-13 <br /> I I <br /> I <br /> S-4 <br /> -647 <br /> (<0 500 Sd�walk <br /> (<2 50) <br /> COUNTRY CLUB BOULEVARD <br /> FIGURE GROUNDWATER CONTOURICHEMICAL CONCENTRATION MAP <br /> 2 Fortner Shell Service Station <br /> 1267 Country Club Boulevard �AMBRIA <br /> Stockton, California 241-0943 <br /> Drawn by LS Date 18-Oct-99 Approved By a\ Date /6-21? rim/ <br />