Questions? Call 800-624-6242

| Items in cart [0]

HARDBACK
price:\$49.95

## Risk Assessment of Radon in Drinking Water (1999) Commission on Life Sciences (CLS)

### Citation Manager

. "F EPA Approach to Analyzing Uncertainty and Variability." Risk Assessment of Radon in Drinking Water. Washington, DC: The National Academies Press, 1999.

 Page 267

The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy.

Table F.4

Probability Density Functions Developed by EPA (1995) in Calculation of Risk, Unit Risk and Variation of Individual Risk Posed by Radon Progeny Inhaled after Transfer from Water (following notation of EPA 1995)

 RF (risk factor, lifetime risk of cancer death per person-WLM) This factor has uncertainty only RF=LN(µ,σ µ= ln(2.83 × 10-4) σ = ln(1.53) UR (unit risk factor, lifetime risk of cancer death per pCi/L) Uncertainty = => Variability 5th percentile mean 95th percentile 5th percentile 1.3 × 10-10 2.1 × 10-9 7.2 × 10-8 median 3.4 × l0-10 5.1 × l0-9 1.8 × l0-8 95th percentile 8.9 × 10-10 1.2 × 10-8 4.2 × 10-8 C (concentration of radon in the water, pCi/L [water]) Lognormal distribution LN(µ,σ) C = LN(µl,σl,) µ = TS(m,s,n) (σ)2=IChi(s,n) Student t distribution, TS(m,s,n) Inverse chi-squared distribution, IChi(s,n) n= 10 m = ln(200) s = ln(1.85) IR (individual risk, lifetime risk of cancers per person-year) Uncertainty==> Variability 5th percentile mean 95th percentile 5th percentile 1.8 × 10-8 5.2 × 10-7 1.9 × 10-6 median 5.4 × 10-8 1.3 × 10-6 5.0 × 10-6 95th percentile 1.5 × 10-7 3.2 × 10-6 1.3 × 10-5
 Page 267
 Front Matter (R1-R14) Public Summary (1-7) Executive Summary (8-22) 1 Introduction (23-31) 2 Baseline Information on Indoor Radon and Radon in Water in the United States (32-49) 3 Transfer of Radon from Water to Indoor Air (50-58) 4 Dosimetry of Ingested Radon and its Associated Risk (59-81) 5 Dosimetry of Inhaled Radon and its Associated Risks (82-104) 6 Molecular and Cellular Mechanisms of Radon Induced Carcinogenesis (105-123) 7 Defining Key Variabilities and Uncertainties (124-140) 8 Mitigation (141-179) 9 Multimedia Approach to Risk Reduction (180-197) 10 Research Recommendations (198-199) References (200-222) Glossary (223-230) A Behavior of Radon and Its Decay Products in the Body (231-240) B A Model for Diffusion of Radon Through the Stomach Wall (241-248) C Water-Mitigation Techniques (249-253) D Risks Associated with Disinfection By-products Formed by Water Chlorination Related to Trihalomethanes (THMs) (254-256) E Gamma Radiation Dose from Granular-Activated Carbon (GAC) Water Treatment Units (257-259) F EPA Approach to Analyzing Uncertainty and Variability (260-268) Index (269-279)