Table 20.

Tier‐3 risk assessment procedure for Organophosphate A. If the PEC:RAC ratio is < 1, then the environmental risk is considered acceptable

Scenario	Acute risk assessment
	PECsw;max (μg/L)	Tier‐3 ETO‐RACsw (μg/L)	PECsw;max:ETO‐RACsw ratio
A	0.035	0.033–0.05	1.06–0.70
B	0.034	0.033–0.05	1.03–0.68
C	0.031	0.033–0.05	0.94–0.62
D	0.030	0.033–0.05	0.91–0.66
E	0.029	0.033–0.05	0.88–0.58
F	0.029	0.033–0.05	0.88–0.58