USGS Scientific Investigations Report 2012–5091  - Reconnaissance of Land-Use Sources of Pesticides in Drinking Water, McKenzie River Basin, Oregon 

Table 11. Summary of results from pre-storm and storm samples. 

[Number of samples: Number in parentheses represents detections based on common detection level of 0.1 µg/L. Abbreviations: E, concentration estimated between the minimum detection level and the laboratory reporting limit; µg/L, microgram per liter] 

Season	Sample type	Number of samples	Compound	Concentration  (µg/L)
64th stormwater pipe
Fall 2002	Pre-storm	4 (0)	CIAT	E 0.005
			Caffeine	0.036
			Carbaryl	E 0.017
			Prometon	E 0.010
	Storm	5 (1)	Caffeine	0.77
			Carbaryl	E 0.091
			Diazinon	0.044
			Prometon	E 0.010
			Trifluralin	E 0.002
69th stormwater channel
Spring 2004	Pre-storm	11 (7)	2,4-D	0.68
			Atrazine	0.023
			Caffeine	0.46
			Carbaryl	E 1.26
			Diazinon	0.089
			Dicamba	0.58
			Diuron	E 3.82
			Malathion	0.04
			Metolachlor	E 0.01
			Siduron	0.16
			Sulfometuron-methyl	E 1.61
	Storm	11 (7)	2,4-D	0.32
			Atrazine	0.15
			Caffeine	0.38
			Carbaryl	E 1.3
			Desulfinylfipronil	E 0.004
			Diazinon	0.36
			Diuron	E 6.07
			Fipronil	E 0.014
			Metolachlor	E 0.009
			Prometon	E 0.05
			Sulfometuron-methyl	E 1.33
Fall 2004	Pre-storm	8 (0)	Atrazine	0.011
			CIAT	E 0.004
			Caffeine	0.068
			Carbaryl	E 0.006
			Diuron	0.08
			OIET	E 0.042
			Prometon	0.02
			Sulfometuron-methyl	E 0.008
	Storm	3 (3)	2,4-D	0.12
			Caffeine	E 0.31
			Diuron	E 0.16