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H acetic acid <br /> 111TCA <br /> anD/dhC 11 DCA anD/dhC <br /> dhC <br /> - -- CO2 <br /> dhC/E\ `,� RD <br /> 11DCE <br /> FIM <br /> 4�_L� <br /> ethane <br /> � H <br /> i <br /> AM <br /> RD T ethanol <br /> P <br /> .' anD <br /> dhC <br /> anD ethane <br /> � Transformation Processes: <br /> aM=aerobic mineralization <br /> 1122PCA dcE — dcE=dichloroelimination <br /> c12DC anD dhC=dehydrochIori nation <br /> I E=elimination <br /> t1 CE H=hydrolysis <br /> dhC,' anD=anaerobic dechlorination <br /> dhC/mD , mD= methanogenic <br /> dcE dechlorination <br /> dcE I RD=reductive dechlorination <br /> qE dhC <br /> 112TCA go <br /> / 12DCA —••—••—••—•• anD biotic reaction <br /> dhC —•• ► biotic or abiotic reaction <br /> ---► abiotic reaction <br /> Chlorinated volatile organic compounds(CVOCs): <br /> 111 TCA=1,1,1-trichloroethane 11DCE= 1,1-dichloroethene 12DCA Compound detected in <br /> 112TCA=1,1,2-trichloroethane c12DCE=cis-l,2-dichloroethene groundwater samples <br /> N 1122PCA= 1,1,2,2-tetrachloroethane t12DCE =trans-1,2-dichloroethene collected at the site <br /> of 11 DCA= 1,1-dichloroethane PCE=tetrachlorcethene <br /> 12DCA=1,2-dichloroethane TCE=trichloroethene Compound detected in <br /> t VC=vinyl chloride(chloroethene) CO2=carbon dioxide 12DCE soil vapor samples <br /> a, collected at the site <br /> U <br /> O <br /> ^I <br /> m Diagram compilied: <br /> IL •ATSDR,Analyses of Groundwater Flow,Contaminant Fate and Transport,and Distribution of Drinking Water at Tarawa <br /> �i Terrace and Vicinity U.S.Marine Corps Base Camp Lejeune,North Carolina.Historical Reconstruction and Present-Day Conditions, <br /> o Chapter D,September 2007 <br /> o •EPA,Draft EPA Region 4 Suggested Practices for Evaluation of a Site for Natural Attenuation(Biological Degradation)of Chlorinated <br /> �i Solvents,November 1999. <br /> •EPA,Ground Water Issue,Microbial Processes Affecting TRANSFORMATION PATHWAYS OF CHLORINATED <br /> o Monitored Natural Attenuation of Contaminants in the VOLATILE ORGANIC COMPOUNDS(CVOCs) <br /> $ Subsurface,September 1999. <br /> •EPA,Technical Protocol for Evaluating Natural Attenuation of <br /> UniFirst Facility <br /> Chlorinated Solvents in Ground Water,September 1999. Stockton, California <br /> V <br /> o •EPA,Ground Water Issue,Reductive Dehalogenalion of By:KLU Date: 10/27/2010 Project No.:0132900000 <br /> Organic Contaminants in Soils and Ground Water,January 1991. <br /> AMEC Geomatrix Num 7 <br />