Table 19.

Effect classes (in μg a.s./L) of the most sensitive community‐ and population‐level endpoints in the experimental pond study that studied the impact of a single application of the insecticide Organophosphate A

	Treatment‐level (measured peak exposure of Organophosphate A in μg a.s./L)
	0.1	0.9	6	44
Macroinvertebrate community	Effect class 1	Effect class 3A	Effect class 5B	Effect class 5B
Most sensitive arthropod population (Gammarus pulex)	Effect class 2	Effect class 5B	Effect class 5B	Effect class 5B