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r <br /> EXPLANATION <br /> ♦ Groundwater monitoring well <br /> —.' ' _" ' " ' Domestic Well <br /> Destroyed Domestic Well <br /> ♦ Groundwater Monitoring Well <br /> with 15—inch Dia. casing <br /> 1 00 <br /> Former <br /> I <br /> Underground. 0. <br /> 99.99 Groundwater elevation in feet <br /> Storage Tank o referenced to Mean Sea Level <br /> Location (MSL) <br /> g9/ Groundwater elevation contour, <br /> UW-4 �' "-X �� ! tf g9. dashed where inferred. <br /> -27. <br /> I t % t ZG / <br /> ♦ �� 1 + <br /> -27.13 ' bispenser MW-s <br /> t Islands <br /> Existing ; —27.26# <br /> Building + <br /> t _-1''"- <br /> New Underground+ <br /> + t i Storage Tank +k <br /> MW-1♦ I i--f" 5 4t Location <br /> —27.07 <br /> Waste Oil <br /> I Tank , Approximate groundwater <br /> flow direction at a <br /> Tire t4. .� gradient of 0.002 RJR <br /> 0 Rack <br /> —N— <br /> T Approximate Property Boundary I <br /> 0 40 <br /> WILLORA ROAD <br /> Source: Fgure Modified From Drawing Provided Scale in Feet <br /> By MPDS Services. Inc. <br /> GotHer - Ryan Inc, POTENTIOMETRIC MAP FIGURE <br /> Tosco (Unocal) Service Station No. 5421 <br /> 6747 Sierra Q., Suite J (514) 551-7555 7303 Pacific Avenue <br /> Dublin, CA 94568 Stockton, California <br /> JOB NUMBER REVIEWED BY DATE REVISED DATE <br /> 180139 December 10 1997 <br />