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iE <br /> I I� <br /> i <br /> i <br /> I � <br /> D <br /> 0 Ro P i' <br /> Budding <br /> (Nq/ <br /> AS-3 , W <br /> existing Underground '—(41) Q E PLA, ,TION. <br /> Storage IlTanks h4 J MW-8 AS-1/ <br /> _ _———_ ' _ ( Air Sparge/ <br /> MW-8 I I (0 88� MW-g <D 50} VVW-2 Vapor Extraction Well <br /> (<050,} I I (12)3 Q AS-3/# Air Sparge Well <br /> S-1(16,0 0 <br /> i� VVWW-11 W MW-11 + Groundwater Monitoring Well <br /> I MW-2 Dispenser'' I[ ) (NS) Not Sampled <br /> MW-4 (<O 50) I Islands I; _ _ _ I N <br /> ___ <br /> I Y(<O 50) I ;# I o 11 II I (16,000) Benzene Concentrations Measured <br /> I I I b i o f obi i , In Parts Per Billion <br /> ail i; I ii l E iI / ` Line Of Equal Concentration Of <br /> �1- � ii I I r 0 S00 Benzene Measured In Parts Per <br /> j til Canopy�L------ , 0� Billion <br /> Concrete , �� o Fo/mer Underground * Not Used to Construct Contours <br /> of Ll E /Storage Tanks <br /> I I Wells Sampled 3/8/05 & 3/9/05 <br /> 31 Building MW-71, MW-1�i �---� �___�� L / <br /> t (<O 50) (<O 50 <br /> _ _ i, _ — <br /> (<0 50) —Wood Fence— — <br /> } M Approximate Property Boundary MW-10 <br /> i <br /> I (0 56) <br /> I <br /> I t I NORTH <br /> t <br /> Wood Fence I 0 14 30 <br /> I L — <br /> - - — — — — — <br /> I I Approximate Scale In Feet <br /> HORIZON ENVIRONMENTAL INC. BENZENE FIGURE <br /> 11 ISOCONCENTRATION MAP <br /> Project Number'11419 4I8 Brown By v Alston/e a FORMER BEACON STATION NO 12419 <br /> Source Figure modified From Survey Provided Prepared By, K I Uptok�ISTOCKTON, CALIFORNIA <br /> � Date 04/05 2350 WATERLOO ROAD <br /> By Ron Archer Civil Engineer Inc <br /> Reviewed By R !Smith i Revised Dote <br /> i d <br />