Table 6. Summary of surrogate recoveries, Columbia River Basin, Washington and Oregon, 2008–10.


[Station names are shown in tables 2 and 3. Values reported in percent. Abbreviatons: ND, not determined because of matrix interferences or sample preparation errors; E, estimated; HCH, hexachlorocyclohexane; DDT, dichlorodiphenyltrichloroethane; PCB, polychlorinated biphenyl; NA, not analyzed, for example, currently used pesticides were not analyzed in 2008]


Wastewater-treatment-plant effluent samples
Surrogate analyte	Wenatchee		Richland	Umatilla	The Dalles	Hood River	Portland				Vancouver	St. Helens	Longview	Blank
	(2008)	(2009)					(a.m.)	(noon)	(p.m.)	(2009)
Anthropogenic organic compounds in unfiltered water
Bisphenol A-d3	87	89	38	94	0	18	31	37	ND	NA	0	94	89	88
Caffeine-c13	84	65	21	97	66	79	91	94	62	NA	36	80	75	89
Decafluoro-biphenyl	58	56	26	84	59	66	56	61	48	NA	30	51	61	76
Fluoranthene-d10	65	67	37	90	61	75	62	64	47	NA	28	63	68	89
Pharmaceuticals in filtered water
Carbamaz-epine-d10	17	22	27	20	13	23	11	8	10	NA	12	29	15	106
Ethyl nicotinate-d4	E 138	65	E 100	E 90	E 101	114	73	81	53	NA	83	54	39	E 134
Currently used pesticides in filtered water
Diazinon-d10	NA	138	E 109	E 105	E 104	E 113	NA	NA	NA	132	E 108	117	116	NA
alpha-HCH-d6	NA	ND	ND	ND	ND	ND	NA	NA	NA	81	ND	102	88	NA
Halogenated compounds on solids
DDT-d8	NA	5	24	42	31	15	35	20	54	NA	18	12	34	64
Dibromo-octafluoro-biphenyl	NA	5	61	63	62	54	65	34	66	NA	56	12	25	53
PCB-202-13C12	NA	4	34	53	43	35	31	22	50	NA	32	7	13	67

Stormwater-runoff samples
Surrogate analyte	Wenatchee	Richland	Umatilla	The Dalles	Hood River	Portland1	Vancouver1	Vancouver2	Portland2	Willamette1	Willamette2		Willamette3	Willamette4	St. Helens	Longview	Blank–Hood River	Blank–Willamette1
											–Dec	–May
Currently used pesticides in filtered water
Diazinon-d10	114	E 153	138	134	125	153	108	105	134	116	126	125	109	116	98	120	100	103
alpha-HCH-d6	80	91	79	97	93	84	92	90	105	92	81	102	91	96	99	99	87	96
Polycyclic aromatic hydrocarbons (PAHs) in unfiltered water
2-Fluoro-biphenyl	70	84	63	52	93	63	73	73	46	80	73	64	77	63	33	67	87	89
2-Fluoro-phenol	66	78	71	23	37	62	64	61	28	79	59	57	74	43	20	54	54	49
Nitrobenzene-d5	103	94	97	57	97	94	85	88	53	102	88	83	90	74	38	79	92	95
Phenol-d5	52	57	58	9	32	58	52	48	28	60	49	57	65	31	19	46	45	37
Terphenyl-d14	45	64	37	34	84	35	55	45	30	49	55	34	52	41	34	52	88	87
2,4,6-Tribro-mophenol	91	113	94	38	47	93	90	93	61	108	102	95	103	73	23	76	63	54
Halogenated compounds on solids
DDT-d8	75	43	46	29	54	14	3	4	74	83	9	83	7	81	97	33	NA	82
Dibromo-octafluoro-biphenyl	62	82	25	45	29	20	3	4	30	52	7	66	7	38	104	23	NA	77
PCB-202-13C12	65	47	19	34	51	7	1	2	40	67	6	65	5	70	65	21	NA	53

First posted April 25, 2012