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T <br /> 4 <br /> EXPLANATION <br /> Mw-11 B---19/MW-13 � <br /> (<50) <br /> Mw? z Soil Boring/Monitoring Well <br /> {<50} <br /> B-13/VW--4 <br /> + Soil Boring/Vapor Well <br /> PTW-1 Pumping- Fest Well <br /> 1W , - - - 1 <br /> ',• z f I Underground Storage Tanks <br /> T1 12,000-Gallon Unleaded <br /> < Gasoline <br /> '�•� T2 12,000--Gallon Unleaded <br /> Gasoline <br /> / MW-7 �. <br /> 55 �� a <br /> Parking Arca MW-6 0.0 E ; 1 r— --� <br /> 1 (65) � 1 Approximate Limits of <br /> B-4/MW-4 .4 0-4pA <br /> h �- — -1 Tank Pit <br /> ( 7 <br /> (Dry) f <br /> ( / 8_161k <br /> 1M1 6 / f <br /> /B-2 yMW-2 6-13, B-19/MW-13 1 <br /> (<50) l <br /> 1 d* —--- g� <br /> r i "`f-2 j Y (550) TPHg Concentration In Ground-Water <br /> statiar� i L _ ^J ' 1n Parts #der Billion (ppb) <br /> Building --,—� 1 1 ' i tt <br /> B-8 pr,,� / Line Of Equal Concentration <br /> -1 IT2i fT' ii12" 5000 ""-�-� Of TPHg 11n Ground--Water <br /> %--^� •j--�--.�-rI '� �,w-: I In Parts er Billion (ppb) <br /> 1 <br /> `e-1v/ L! J-1 i 1 0 �►c�o <br /> <50) �{Dry) (Dry}Mw-I B-3/MW-3 <br /> e-15/ ,,i�� ® Not Used iln Map Construction <br /> � �. � <br /> Mw-10 <br /> { Sldawolk Drlwway Sidewalk <br /> MARCH LANE ` <br /> 4 <br /> Source Map modified from site plan B-14/ (<50) 50 A 25 50 100 <br /> provided by Unocal and Monitoring ' <br /> wells surveyed by Tom 0 Morrow, Inc Approxirn�te Scale (feet) <br /> TPHg CONCENTRATION IN GROUND WATER PLATE <br /> . Unocal Third Quarter 1992 <br /> l Service Station No. 6981 <br /> 4707 Pacific Avenue 14 <br /> PROJECT N0. 380328032J4A Stockton, California <br />