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Risk-Based Corrective Action (RBCA)

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Risk-Based Corrective Action (RBCA) Risk-Based Corrective Action (RBCA) By: Mike Trombetta Department of Environmental Quality AGENDA • Petroleum Release Risks • Non-DEQ-7 Chemicals • Recen t RBCA U pd a tes Water Table Surface Spill Water Table Surface Spill Water Table Surface Spill Water Table Surface Spill Water Table Leaching to Groundwater Water Table Leaching to Groundwater Water Table Leaching to Groundwater Water Table Leaching to Groundwater Water Table Leaching to Groundwater Water Table Groundwater Flow Leaching to Groundwater Water Table Groundwater Flow Leaching to Groundwater Water Table Groundwater Flow Leaching to Groundwater DiDrin king Water Well Water Table Groundwater Flow Leaching to Groundwater DiDrin king Water Well Water Table Groundwater Flow Leaching to Groundwater DiDrin king Water Well Water Table Groundwater Flow Point of Compliance DEQ-7 Water Table Groundwater Flow Montana’s Water Quality Standards Soil Leaching ViblVariables: Precipitation Soil porosity Dispersivity Fraction organic carbon Decay coefficient Source area size (L-W-T) 54 total parameters Water Table Groundwater Flow Other Risks from Petroleum Releases Direct Contact Commercial Setting Employee Direct Contact Residential, Customer, Recreator, or Trespasser Direct Contact Water Table Construction Worker Direct Contact Water Table Construction Worker Direct Contact Water Table Construction Worker Direct Contact Water Table Construction Worker Indoor Air Vapors IdIndoor AiVAir Vapors Chemistry of Petroleum Products Gasoline Example Gasoline –Over 140 Chemicals 2-methylpropane Isobutane Lighter 1-Butene 2-Methyl-2-butene n-Butane Isopentane Pentene 2-Pentene dimethylcyolopropane 2,3-Dimethylbutane Cyclopentene unknown 3-Methylpentane 2-Methyl-1-pentene n-Hexane unknown 4-Methyl-2-pentene 2,4-Dimethylpentane unknown 4-Methylpentene Methylcyclopentane Methyl-tertiary-bytylEther (MTBE) 2,2-Dimethylpentane Benzene 2-Methylhexane 3-Methylhexane 2,2,4-Trimethylpentane Trimethylpentane Dirnethylhexane unknown 2,3,3-Trimethylpentane 1,1,3-Trimethylcyclopentane 1-trans-2-cis-3-Trimethylcyclopentane unknown Nonanol 1,4-Methylhexene Heptane 2,5-Dimethylhexane 2,4-Dimethylhexane 2,3,4Trimethylpentane 232,3-Dimethylhexane 2,3-Dimethylhexane Ethylbenzene Methylcyolohexane unknown 1-trans-2-cis-4-trimethylcyolopentane unknown Toluene 2-Methyl-3-ethylpentane unknown 1,2-Dimethylcyclohexane unknown 2,3,3-trimethyihexane 1,3-dimethylcyclohexane unknown Dimethylundecane unknown 2,2,3,1,4-tetramethylpentane p-Xylene unknown m-Xylene 1,2-Dibromoethane (EDB) 3,3-Dimethylheptane Trimethvlpentane o-Xylene unknown 3,4,4-Trimethyl-2-hexene unknown n-Nonane Cumene 1-Methyl-3-ethylbenzene 3-Methylnonane n-Propylbenzene o-Ethyltoluene 1-Methyl-4-ethylbenzene 1,2,4-Trimethylbenzene unknown 1,3,5-Trimethylbenzene 3-Methylnonane Cumene unknown Trimethylbenzene o-Methylstyrene 4-Methyldecane unknown 1,4-Diethylbenzene 1-Methyl-2-n-propylbenzene unknown Cymene 3-n-Propyl-toluene unknown 4-Methyldecane 1,4-Dimethyl-2-ethylbenzene unknown 5-Ethyl-methylxylene 1,4-Dimethy-2-ethylbenzene unknown 2,6-Dirnethyistyrene Diethylbenzene unknown 1,3,5-TriMe-benzene 1,2,4-TriMe-benzene 1,2,3-TriMe-benzene Napthalene unknown 1,6-Dimethyllindan 2-Methylnaphthalene 1-Methylnaphthalene n-Dodecane unknown 1,1-Dimethylindan unknown Dimethylnaphthalene unknown Heavier 2-Methylnapthelene Gasoline –Over 140 Chemicals 2-methylpropane Isobutane Lighter 1-Butene 2-Methyl-2-butene n-Butane Isopentane Pentene 2-Pentene dimethylcyolopropane 2,3-Dimethylbutane Cyclopentene unknown 3-Methylpentane 2-Methyl-1-pentene n-Hexane unknown 4-Methyl-2-pentene 2,4-Dimethylpentane unknown 4-Methylpentene Methylcyclopentane Methyl-tertiary-bytylEther (MTBE) 2,2-Dimethylpentane Benzene 2-Methylhexane 3-Methylhexane 2,2,4-Trimethylpentane Trimethylpentane Dirnethylhexane unknown 2,3,3-Trimethylpentane 1,1,3-Trimethylcyclopentane 1-trans-2-cis-3-Trimethylcyclopentane unknown 2-Methyl-1-pentene Nonanol 1,4-Methylhexene Heptane 2,5-Dimethylhexane 2,4-Dimethylhexane 2,3,4Trimethylpentane 232,3-Dimethylhexane n-Hexane 2,3-Dimethylhexane Ethylbenzene Methylcyolohexane unknown 1-trans-2-cis-4-trimethylcyolopentane unknown 4-Methyl-2-pentene Toluene 2-Methyl-3-ethylpentane unknown 1,2-Dimethylcyclohexane unknown 2,3,3-trimethyihexane 1,3-dimethylcyclohexane 2,4-Dimethylpentane unknown Dimethylundecane unknown 2,2,3,1,4-tetramethylpentane p-Xylene unknown m-Xylene 4-Methylpentene 1,2-Dibromoethane (EDB) 3,3-Dimethylheptane Trimethvlpentane o-Xylene unknown 3,4,4-Trimethyl-2-hexene Methylcyclopentane unknown n-Nonane Cumene 1-Methyl-3-ethylbenzene 3-Methylnonane n-Propylbenzene o-Ethyltoluene Methyl-tertiarybutyl-ether (MTBE) 1-Methyl-4-ethylbenzene 1,2,4-Trimethylbenzene unknown 1,3,5-Trimethylbenzene 3-Methylnonane Cumene unknown 2,2-Dimethylpentane Trimethylbenzene o-Methylstyrene 4-Methyldecane unknown 1,4-Diethylbenzene 1-Methyl-2-n-propylbenzene Benzene unknown Cymene 3-n-Propyl-toluene unknown 4-Methyldecane 1,4-Dimethyl-2-ethylbenzene unknown 2-Methylhexane 5-Ethyl-methylxylene 1,4-Dimethy-2-ethylbenzene unknown 2,6-Dirnethyistyrene Diethylbenzene unknown 1,3,5-TriMe-benzene 1,2,4-TriMe-benzene 1,2,3-TriMe-benzene Napthalene unknown 1,6-Dimethyllindan 2-Methylnaphthalene 1-Methylnaphthalene n-Dodecane unknown 1,1-Dimethylindan unknown Dimethylnaphthalene unknown Heavier 2-Methylnapthelene Gasoline –Over 140 Chemicals C-5 2-methylpropane Isobutane Lighter 1-Butene 2-Methyl-2-butene n-Butane Isopentane Pentene C 2-Pentene C dimethylcyolopropane 2,3-Dimethylbutane Cyclopentene unknown 3-Methylpentane CC 2-Methyl-1-pentene n-Hexane unknown 4-Methyl-2-pentene 2,4-Dimethylpentane C unknown 4-Methylpentene Methylcyclopentane Methyl-tertiary-bytylEther (MTBE) 2,2-Dimethylpentane Benzene 2-Methylhexane 3-Methylhexane 2,2,4-Trimethylpentane Trimethylpentane Dirnethylhexane unknown 2,3,3-Trimethylpentane 1,1,3-Trimethylcyclopentane 1-trans-2-cis-3-Trimethylcyclopentane unknown Nonanol 1,4-Methylhexene Heptane 2,5-Dimethylhexane 2,4-Dimethylhexane 2,3,4Trimethylpentane 232,3-Dimethylhexane 2,3-Dimethylhexane Ethylbenzene Methylcyolohexane unknown 1-trans-2-cis-4-trimethylcyolopentane unknown Toluene 2-Methyl-3-ethylpentane unknown 1,2-Dimethylcyclohexane unknown 2,3,3-trimethyihexane 1,3-dimethylcyclohexane unknown Dimethylundecane unknown 2,2,3,1,4-tetramethylpentane p-Xylene unknown m-Xylene 1,2-Dibromoethane (EDB) 3,3-Dimethylheptane Trimethvlpentane o-Xylene unknown 3,4,4-Trimethyl-2-hexene unknown n-Nonane Cumene 1-Methyl-3-ethylbenzene 3-Methylnonane n-Propylbenzene o-Ethyltoluene 1-Methyl-4-ethylbenzene 1,2,4-Trimethylbenzene unknown 1,3,5-Trimethylbenzene 3-Methylnonane Cumene C unknown C Trimethylbenzene o-Methylstyrene 4-Methyldecane unknown 1,4-Diethylbenzene CC 1-Methyl-2-n-propylbenzene C unknown Cymene 3-n-Propyl-toluene unknown CC 4-Methyldecane 1,4-Dimethyl-2-ethylbenzene C unknown 5-Ethyl-methylxylene 1,4-Dimethy-2-ethylbenzene unknown 2,6-Dirnethyistyrene C Diethylbenzene C unknown 1,3,5-TriMe-benzene 1,2,4-TriMe-benzene 1,2,3-TriMe-benzene Napthalene unknown C C 1,6-Dimethyllindan 2-Methylnaphthalene 1-Methylnaphthalene n-Dodecane unknown 1,1-Dimethylindan unknown Dimethylnaphthalene unknown Heavier 2-Methylnapthelene C-12 Gasoline –Over 140 Chemicals C-5 2-methylpropane Isobutane Lighter 1-Butene 2-Methyl-2-butene n-Butane Isopentane Pentene C 2-Pentene C dimethylcyolopropane 2,3-Dimethylbutane Cyclopentene unknown 3-Methylpentane 2-Methyl-1-pentene CC n-Hexane Technical unknown 4-Methyl-2-pentene 2,4-Dimethylpentane C unknown 4-Methylpentene Methylcyclopentane Methyl-tertiary-bytylEther (MTBE) 2,2-Dimethylpentane Benzene 2-Methylhexane 3-Methylhexane 2,2,4-Trimethylpentane Cha llenge ! Trimethylpentane Dirnethylhexane unknown 2,3,3-Trimethylpentane 1,1,3-Trimethylcyclopentane 1-trans-2-cis-3-Trimethylcyclopentane unknown Nonanol 1,4-Methylhexene Heptane 2,5-Dimethylhexane 2,4-Dimethylhexane 2,3,4Trimethylpentane 232,3-Dimethylhexane 2,3-Dimethylhexane Ethylbenzene Methylcyolohexane unknown 1-trans-2-cis-4-trimethylcyolopentane unknown Toluene 2-Methyl-3-ethylpentane unknown 1,2-Dimethylcyclohexane unknown 2,3,3-trimethyihexane 1,3-dimethylcyclohexane unknown Dimethylundecane unknown DEQ – 7 Standards 2,2,3,1,4-tetramethylpentane p-Xylene unknown m-Xylene 1,2-Dibromoethane (EDB) 3,3-Dimethylheptane Trimethvlpentane o-Xylene unknown (On ly 8 Ch em ica ls ) 3,4,4-Trimethyl-2-hexene unknown n-Nonane Cumene 1-Methyl-3-ethylbenzene 3-Methylnonane n-Propylbenzene o-Ethyltoluene 1-Methyl-4-ethylbenzene 1,2,4-Trimethylbenzene unknown 1,3,5-Trimethylbenzene 3-Methylnonane Cumene C unknown C Trimethylbenzene o-Methylstyrene 4-Methyldecane unknown 1,4-Diethylbenzene CC 1-Methyl-2-n-propylbenzene C unknown Cymene 3-n-Propyl-toluene unknown CC 4-Methyldecane 1,4-Dimethyl-2-ethylbenzene C unknown 5-Ethyl-methylxylene 1,4-Dimethy-2-ethylbenzene unknown 2,6-Dirnethyistyrene C Diethylbenzene C unknown 1,3,5-TriMe-benzene 1,2,4-TriMe-benzene 1,2,3-TriMe-benzene Napthalene unknown C C 1,6-Dimethyllindan 2-Methylnaphthalene 1-Methylnaphthalene n-Dodecane unknown 1,1-Dimethylindan unknown Dimethylnaphthalene unknown Heavier 2-Methylnapthelene C-12 Gasoline –Over 140 Chemicals C-5 2-methylpropane Isobutane 1-Butene 2-Methyl-2-butene n-Butane Isopentane Lighter Pentene 2-Pentene dimethylcyolopropane 2,3-Dimethylbutane Cyclopentene unknown 3-Methylpentane 2-Methyl-1-pentene n-Hexane unknown 4-Methyl-2-pentene 2,4-Dimethylpentane unknown 4-Methylpentene Methylcyclopentane Methyl-tertiary-bytylEther (MTBE) 2,2-Dimethylpentane Benzene 2-Methylhexane 3-Methylhexane
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