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r <br /> �0'. Budding <br /> —� Existing Underground !' � <br /> �,- -' Storage Tanks MW-6 <br /> ,- -' r-------I (86) W (<050) <br /> _ — I I MW-Q a <br /> MW-3 <br /> I I � Q <br /> MW-2 I I AS-1/ 17 OC EXPLANATION. <br /> I (<0 50) I Dispenser I VW-2 wAS-1/ <br /> `(M-4 I Islands I i r_._-.�i N VW-1/4 Vapor Extraction Well <br /> I e I E iI MW-10+ Groundwater Monitoring Well <br /> E a r i °�' I' Former Underground <br /> �- � . _—————I I i a i � I� Storage Tanks (86) Benzene Concentrations Measured <br /> �I Canopy I I F F II o In Parts Per Billion <br /> Concrete 1 <br /> of i i i �I Line Of Equal Concentration Of <br /> Station �__-1 <br /> 31 Building MW-7 MW-1 t7 �Sp_ Benzene Measured In Parts Per <br /> Wood Fence (<0 50) (<0 50)LF <br /> Billion <br /> I (<050)--�—�—.—,—,...,_.,...._.—.—.—.—.—.Y,_.,� <br /> I <br /> MW-5 Approximate Property Boundary MW-10 Wells Sampled 12/09/99 <br /> I (<0 50) <br /> I � <br /> — Wood Fence— —,— <br /> 0 30 NORTH <br /> a _ HORIZON ENVIRONMENTAL INC. BENZENE FIGURE <br /> ISOCONCENTRATION MAP <br /> Approximate Scale In Feet <br /> Project Number 1414 42 Drawn By o Alston/C B FORMER BEACON STATION D 419 3 <br /> Prepared K Mateik Date o1 00 2350 WATERLOO ROAD <br /> Source Figure Modified From Survey Provided P By / STOCKTON, CALIFORNIA I <br /> By Ron Archer Civil Engineer Inc Reviewed By G Barker Revised Date <br />