LIST OF ACRONYMS µg µm ADAF AT ATSDR BMCL BMD BW CA CERCLA CSF DAF ED EC EF EPA ER ET ETh Fr Ftotal Hb/g-animal Hb/g-human HEAST HEC HI HQ ICRP IR IRIS IUR kg LEC10 LOAEL ME MF mg MOA MRL MW NCEA NOAEL ORD OSRTI Microgram Micrometer Age Dependent Adjustment Factor Averaging Time Agency for Toxic Substances and Disease Registry Benchmark Concentration, Lower confidence limit Benchmark Dose Body Weight Contaminant Concentration in Air Comprehensive Environmental Response, Compensation, and Liability Act Cancer Slope Factor Dosimetric Adjustment Factor Exposure Duration Exposure Concentration Exposure Frequency Environmental Protection Agency Extra-respiratory Exposure Time Extrathoracic Fractional Deposition in region r Total particle deposition in respiratory tract Animal Blood:Gas Partition Coefficient Human Blood:Gas Partition Coefficient Health Effects Assessment Summary Table Human Equivalent Concentration Hazard Index Hazard Quotient International Commission for Radiological Protection Inhalation Rate Integrated Risk Information System Inhalation Unit Risk Kilogram Lower limit on Effective Concentration, using a 10 percent response level Lowest Observable Adverse Effect Level Microenvironment Modifying Factor Milligram Mode of Action Minimal Risk Level Molecular Weight National Center for Environmental Assessment No Observable Adverse Effect Level Office of Research and Development Office of Superfund Remediation and Technology Innovation
vi
LIST OF ACRONYMS (CONT.) OSWER PBPK POD ppm PPRTV PRG PU Q-alv QSAR RAGS RBC RfC RfD RGDR RDDR RME SA SSL STSC TB TOT UF Ve Office of Solid Waste and Emergency Response Physiologically Based Pharmacokinetic Point of Departure Parts Per Million Provisional Peer Reviewed Toxicity Value Preliminary Remediation Goal Pulmonary Alveolar ventilation rate Quantitative Structure-Activity Relationship Risk Assessment Guidance for Superfund Risk-Based Concentration Reference Concentration Reference Dose Regional Gas Dose Ratio Regional Deposited Dose Ratio Reasonable Maximum Exposure Surface Area Soil Screening Level Superfund Health Risk Technical Support Center Tracheobronchial Total Respiratory System Uncertainty Factor Minute Volume
vii