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' EXPLANATION <br /> YW-10 I <br /> Groundwater monitoring well <br /> I = <br /> A Destroyed well <br /> 0 Recovery well <br /> Z <50 I <br /> e <0 50 I o la Vapor extraction well <br /> A 1 <2 0LStation I o <br /> _ # Budding Remediation a <br /> + A/9/C TPH{G) {Total Petroleum <br /> I <50/ Enclosure I Q- Hydrocarbons as Gasoline)/ <br /> cc I <0 50/ Benzene/MTBE concentrations <br /> <50/ <2 0+ ♦Yw-e I in ppb <br /> <0 50/ I <50/<0 50/27+ I <br /> 38+ , mw-1 --- NS Not Sampled <br /> VW-1 *Yw-4 <50/ I 33,000 2,900 4 7+ y <br /> Underground I --- -� < _ -_� <0 50/33+ / / + MTSE b EPA Method 8260 <br /> Storage Tanks ;_—__=� K1osk NS 0Yw-a <br /> - ` VW-s+ <50/<0 50/<2 0+ <br /> I VW-3 t t 'GVW-7 <50/3 8/250+ <br /> -}Yw-o MW-3 Mw-� <br /> <50 131f a MW-2 PTW-1 <50/<0 50/150+ <br /> / <br /> VW-6 '� is MW-14 <br /> <0 50/ ! NS Vw-4 ♦Yw-18 ♦YW-7 _ <br /> <2 0+ ._ - -- -- ------- <br /> Gz50/ <50/<0 50/<2 0+ <br /> 231850501 Dispenser 3,100/55/100+ <br /> Islands <br /> 50 710/120/200+ <br /> < 000/ PACIFIC AVENUE I <br /> <0 50/ —_27 <br /> 0<5 + <br /> 13+ / l � <br /> a 60 <br /> �r Yw 13 ♦MW-15 MW-t2 <br /> sow= From Dr Pm dW <50/<0 50/7 2+ Scale in Feet <br /> 9 ;MwIn- <br /> 428Wer - Ryan Inc. CONCENTRATION MAP nGUR: <br /> Tosco (Unocal) Service Station No. 6981 <br /> 6747 Sierra CL. Sude J (925) 551-7555 4707 Pacific Avenue <br /> Dublin, CA 94568 Stockton, California 2 <br /> JOB NMUSER REVIEWED BY DATE REVISED DATE <br /> 180138 _____ _____October_25 and 26. 1999 <br />