RTR risk assessment process: chronic inhalation RTR Inventory - PDF document

RTR risk assessment process: chronic inhalation RTR Inventory Refineries: 156 facilities, 54 HAP PC: 104 facilities, 125 HAP Meteorological Census HEM3 Data Data RfCs or Annual Mean Unit Similar Values Concentrations Risk Estimates Refineries: 45 HAP At Block Refineries: 21 HAP PC: 82 HAP Centroids PC: 61 HAP Lifetime HQ for Cancer Risk Each HAP For Each HAP @ Each Block @ Each Block Target Organs for Critical Effects Total Lifetime Cancer Risk TOSHI for For Each Each Block Block Max HQ Max Cancer Risk per HAP Max TOSHI Max Total Cancer Risk Target Organ(s) Total Incidence HAP Drivers HAP Drivers Distribution of HQ Distribution of Risk

RTR risk assessment process: acute inhalation RTR Inventory Request Short- Remodel Refineries: 156 facilities, 54 HAP Term Emissions PC: 104 facilities, 125 HAP Data from Facility Meteorological Census HEM3 Data Data Max Hourly Conc. On Polar Grid Around Emission Examine Maps Point And Satellite Images of Facility; Remove Onsite Locations X 10 Remove On-site AEGLs, RELs, etc. Screening Estimate Exposure Points Refineries: 34 HAPs for 1-h Exposure Refine Assessment PC: 39 HAPs Screening HQ for Each HAP & D/R Value For No Yes Yes HQ >1? AEGL or ERPG? No Substantial Potential for Acute Some Potential for Acute Inhalation Risk – Inhalation Acute Inhalation Risk – Risk Unlikely Refineries: 2 HAPs @ 8 Facilities PC: 3 HAPs @ 8 Facilities

RTR risk assessment process: multipathway health RTR Inventory No Refineries: 1 PB-HAP PB-HAPs? PC: 11 PB-HAP Yes No > De minimis ? Yes Site-Specific Site- TRIM.FaTE And Default Specific Fate-Transport Modeled Parameters Domain Long-Term Average Air Concentrations Representative Long-Term Average Concentrations In Water, Soil, Sediment, Farm Produce, Meat, and Fish Subsistence Average Lifetime Farming, Fishing Daily Average Scenarios Dose Daily Dose RfDs or Oral Similar Oral Potency D/R Values Slopes Screens Out – Noncancer Risk Carcinogenic Risk Substantial Multipathway Characterization – Characterization – Health Risk Unlikely Refineries: 0 HAPs Refineries: 0 HAPs Refineries: 1 HAP PC: 2 HAPs PC: 1 HAP PC: 9 HAPs

RTR risk assessment process: ecological Direct Air Concs. At No Contact Block Centroids Concern @ PC: 1 HAP < RfC? Select Species, Yes Habitats, and Characterize Air Benchmarks Direct Contact No Air Conc.> Ecological Risk Benchmark? PC: HCl targeted because of high corrosivity and emissions Yes Results of Multipathway HQs>1? No Health Assessment TOSHIs>1? PC: Hg & dioxin carried Risk>1e-6? into ecological assessment Yes Default Develop Select Fate-Transport Modeled Species and Parameters Domain Habitats Modeled Concentrations TRIM.FaTE In Wildlife Food and Tissue Food and Tissue Benchmarks Concs.> Yes No Benchmarks ? Characterize Substantial Multipathway Ecological Ecological Risk Risk Unlikely PC: 2 HAPs