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• U-27B At-a-Glance • " 011 Enhanced Anaerobic Biological Oxidation Pilot Study Chevron Facility 306415,Stockton,California 2,500 -Sulfate 2,000 Fluorescein Insufficient Reagent c 1,500 Distribution O J E 1,000 $ 500 v 0 LL -10 0 10 20 30 40 50 70 90 100 110 120 130 740 150 180 170 El Time me(Days) 41,500 41,000 40,500 40,000 6 39,500 39,000 t7 38,500 Variable TPH-g and a38,000 TPH-d concent 37,500 rations F 37,000 36,500 -10 0 10 20 30 40 50 60 70 80 90 100 710 120 130 140 750 160 170 Elapsed Time(Days) 9,000 8,000 7,000 09 6,000 w 5,000 4 4,000TPHd a 3,000 2,000 -*-TPHd SiGel 0 1,000 = 0 Fa- -10 0 10 20 30 40 50 60 70 80 g0 100 110 120 130 140 150 160 170 Elapsed Time(Days) 7,000 J m 6,000 y 5,000 C 4,000 t 3,000 z 2,000 1,000 m -_to 0 10 20 30 40 50 80 70 �80 90 100 710 120 730 140 150 160 170 Elapsed Time(Days) r Benzene -Toluene -Ethylbenzene -Xylenes - Napthalene 2,500 7 6 a 2,000 5 2 N 9- 1,500 1,500 4 I] 1,000 3 LL E 2 w w 500 .f - 1 0 7 H 0 0 p j p -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 760 170 Elapsed Time(Days) -Dissolved Mg -TDS -Dissolved Fe - Dissolved Mn Notes: mg/L milligrams per liter TDS total dissolved solids ug/L micrograms per liter Fe iron TPH-g total petroleum hydrocarbons as gasoline Mg magnesium TPHd total petroleum hydrocarbons as diesel Mn manganese TPHd SiGel total petroleum hydrocarbons as diesel using the silica gel method BTEX benzene,toluene,ethylbenzene,and xylenes Baseline TPHd SiGel samples analyzed with 3 gram method(open symbol) Post-Injection TPHd SiGel samples analyzed with 10 gram method(closed symbol)