TABLE 7.

Recommended default values for fate assessment

Symbol	Parameter	Recommended default	Comments
P	US and Canadian Population	3.37 × 108 people	U.S. Census (2010) and Statistics Canada (2011)
W	Daily per capita wastewater	388 L/day/person	U.S. EPA (1999) and Kenny et al. (2009)
DF	Dilution factor	1 for conservative assessment, site-specific dilution factors when available
SS	Suspended solids concentration	10 mg/L	see references in Cowan et al. (1995)
SD	Sediment solids concentration	1 kg/L	see references in Cowan et al. (1995)