Oral exposure parameters Organics: 1 Chemical-specific. Oral Inorganics: These table values are to be used only bioavailability No default when other reasonable information is Unitless not available. Organics: 1 Bioaccessibility of inorganics from soil or Oral Inorganics: other media can be approximated with bioaccessibility No default experimental tests (Sections 3.4 and 4.0). Inhalation exposure parameters The residential value is midpoint of range for ‘closed’ Australian dwellings. Air changes will be higher with open Residential: 0.6 Building air doors/windows, ceiling fans and air Commercial: no #/hr exchange rate conditioning. A single value is not suggested recommendation for commercial buildings. Ur estimates not available (Section 5.2.4). Indoor particle No Markedly differs from house to house. No #/hr deposition rate recommendation suggested value (Section 5.3.1). Average values. There is a wide range of Floor area of Houses: 190 values for houses and other types of residential Other: 120 m2 dwellings (Section 5.4.1). Upper estimates dwelling All: 180 not available. Average values. Assumed ceiling height is Air volume of Houses: 460 2.4 m. There is a wide range of values for residential Other: 280 m3 houses and other types of dwellings dwellings All: 420 (Section 5.4.1). Upper estimates not available. Uptake (product of Chemical-specific value should be used if retention and Default 100% unitless available absorption) of (Section 5.5). inhaled contaminants Background PM10; 17 (39) µg/m3 National average of all urban monitoring particulate PM2.5; 7 (16) [unitless] sites – 50th percentile, (95th percentile).
Oral exposure parameters Oral bioavailability Organics: 1 Inorganics: No default Unitless Chemical-specific. These table values are to be used only when other reasonable information is not available. Bioaccessibility of inorganics from soil or other media can be approximated with experimental tests (Sections 3.4 and 4.0). Oral bioaccessibility Organics: 1 Inorganics: No default Inhalation exposure parameters Building air exchange rate Residential: 0.6 Commercial: no recommendation #/hr The residential value is midpoint of range for ‘closed’ Australian dwellings. Air changes will be higher with open doors/windows, ceiling fans and air conditioning. A single value is not suggested for commercial buildings. Ur estimates not available (Section 5.2.4). Indoor particle deposition rate No recommendation #/hr Markedly differs from house to house. No suggested value (Section 5.3.1). Floor area of residential dwelling Houses: 190 Other: 120 All: 180 m2 Average values. There is a wide range of values for houses and other types of dwellings (Section 5.4.1). Upper estimates not available. Air volume of residential dwellings Houses: 460 Other: 280 All: 420 m3 Average values. Assumed ceiling height is 2.4 m. There is a wide range of values for houses and other types of dwellings (Section 5.4.1). Upper estimates not available. Uptake (product of retention and absorption) of inhaled contaminants Default 100% unitless Chemical-specific value should be used if available (Section 5.5). Background particulate PM10; 17 (39) PM2.5; 7 (16) µg/m3 [unitless] National average of all urban monitoring sites – 50th percentile, (95th percentile).
w.Environmental-Health-Risk-Assessment.docx