Table 2 Input factors and abbreviations for exposure assessment (Semerjian & Dennis, 2007).
From: Risk assessment of trihalomethanes in drinking water with seasonal variation considerations
Input parameter | Unit | Value | References |
|---|---|---|---|
THM Conc. in water (C) | mg/l | See tables | This study |
Exposure rate (ER) | L/day | 2.0 | US EPA (1997) |
Exposure frequency (EF) | days/ year | 365 | Lee et al. (2004) |
Exposure duration (ED) | year | 70 | US EPA (1997) |
Average exposure time (AT) | days/year | 70 × 365 | Lee et al. (2004) |
Body weight (BW) | kg | 70 | Lee et al. (2004) |
Surface area (SA) | M2 | 1.8 | US EPA (1997) |
Exposure time (ET) | min/day | 35 min | RAIS (2009) |
Aspirated air (AA) | m3 per day | 20 = 0.83333 m3/hr | Semerjian and Dennis (2007) |
Volatilization factor for chloroform (VF) | L/ m3 | 0.5 | Semerjian and Dennis (2007) |
Permeability coefficient (PC) | cm/h | 0.00683 (CF) 0.00402(BDCM) 0.00289(DBCM) 0.00235(BF) | RAIS (2009) |
