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3 <br /> i EXPLANATION <br /> B-7 <br /> B-8 <br /> B-8 <br /> (<1 0) d B-5_0 ; Soil Boring/Monitoring Well <br /> V7 <br /> Parking Area B-18 <br /> -�- B-13+ <br /> Soil Boring/Vapor Well <br /> B-2 <br /> B-4 B-11 (810) B-9I <br /> (5300) o r Soil Boring <br /> (<2 0) � <br /> a� <br /> 8-13 -�- Pumping--Test Well <br /> (<1 0) fl <br /> ♦� �1 1 y —j–J Underground Storage Tanks <br /> .. <br /> 3 T1 12,000–Gallon Unleaded <br /> 2A LLi Gasoline <br /> o$ i ,,� ( 4 )+ ` i!<2) f T2 12,000–Galion Unleaded <br /> Gasoline <br /> Ld <br /> i r00 4i ? > r Approximate Limits of <br /> i (1=26) 4r i I— Tank Pit <br /> Station L —� _ — — J cn Q <br /> Building I -� �*--..ti- —/ <br /> <1 g (5300) Concentration Of Total Petroleum <br /> � f f 12 B-5 _U Hydrocarbons As Gasoline (TPHg) <br /> i r(�1)iQ1900i (<2) In Parts Per Million (ppm) <br /> T2 i '/T1 /�' g_12 U a0 Line Of Equal Concentration Of <br /> ! i l <br /> 1 <br /> �r (2 0) Q r��'S Total Petroleum Hydrocarbons <br /> (13 f400 •, <1 0 0– f As (TPHg) In Parts Per Million <br /> fir (' �� ''/ i'{15) {ppm} <br /> �it i <br /> 1 _I J�,r�� J, 18e Sod Sample Location <br /> L �t� 4 (TPHg/Benzene) <br /> ! 16 r�1 <br /> 8-10 <br /> 4017 �i 8 2. S--19–LINE 2 <br /> B-9 •(18 6(<1) )(24) 2A S-19–LINE 2A <br /> �(<10) + B-1 <br /> 9 5-18–LINE 9 <br /> (<2 0) B_3 10 S-17-M <1/<0 1) <br /> (<2 0) 12 S-22--G (1900/84) <br /> 13 S-17–L (<1/<01) 1j <br /> 14 S--18–P (1400/24) n <br /> Driveway Sidewalk 15 S-22–H (<1/<O1) <br /> Sidewalk , 16 S--17–K (1 8/<01) <br /> 17S-20–J (<11/<01) <br /> MARCH LANE 18 S--22-1 (2 4/0 2) <br /> Source. Map modified from site plan 20 i 0 20 40 <br /> provided by Unocal and Monitoring Approximate Scale (feet) <br /> wells surveyed by Tom 0. Morrow, Inc <br /> CONCENTRATION OF TPHg IN SOIL (15-25 FEET) PLATE <br /> A- M Unocal Service Station No. 6981 I <br /> 4707 Pacific AvenueNO <br /> 11 <br /> PROJECT NO, 38032 8032J6C Stockton, Callfornle <br /> I <br /> i <br />