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• U-27B'At-a-Glance tld 0i Enhanced Anaerobic Biological Oxidation Pilot Study Chevron Facility 306415,Stockton,California 2,500 Sulfate 2,000 - Fluorescein Good Reagent E; 1,500 Distribution E 1,000 T 500 0 LL o -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Elapsed Time(Days) 140,000 120,000 100,000 80,000 -'�-• 60,000 Initial increase in TPH-g, potentially 40,000 due to enhanced dissolution 20,000 0 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Elapsed Time(Days) 12,000 —TPH-d 10,000 TPH-d SiGel Decreasing TPH-d 8,000 Concentrations = 6,000 e — --- 4,000 = 2,000 a 0 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Elapsed Time(Days) 25,000 800 700 20,000 600 500 w 15,000 400 c 10,000 300 i 200 n 1° 5'000 100 Z 0 0 -10 0 10 20 30 40 50 60 70 Be 90 100 110 120 130 140 150 160 170 Elapsed Time IDays1 Benzene Toluene—Ethylbenzene—Xylenes�Napthalene 2500 7 E 6 2000 5 a i `C N d 1500 4 0 �-� m 1000 --i 3 LL E 2 v 0 500 / 1 N m 0 0 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 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 TPH-d 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)