Table 3. Exposure Model Parameters, Values, and References.

		Participant A		Participant B
Variable	Description	E. coli	Enterococci	E. coli	Enterococci	Reference
CM	Hand Concentration, Measured (CFU / 2 hands)	> 700	> 700	> 700	340	This study
CI	Hand Concentration, Initial for Model (CFU / 2 hands)	1346	1591	1346	773	This study
CF	Fomite Concentrations	See Table 1
fH	Sampling Efficiency, Hands	0.52	0.44	0.52	0.44	Pickering et al. (2012)
fF	Sampling Efficiency, Fomites	0.2	0.2	0.2	0.2	Moore et al. (2007)
SH	Surface Area of Hands	440	440	440	440	USEPA (2011)
SF	Surface Area of Contact, Hand-to-Fomite	44	44	44	44	Assumed
SW	Surface Area of Contact, Hand-to-Water	440	440	440	440	Assumed
K	Inactivation Rate on Hands	-0.003	-0.00017	-0.003	-0.00017	Pinfold (1990)
TE	Transfer Efficiency	See Table 2