USGS Scientific Invesigations Report 2012–5068  - Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008

Table A6. Reporting limits and methods used for trace elements analyzed in stormwater runoff, Columbia River Basin, Washington and Oregon, 2009–10. 

[Bold type indicates a detection in stormwater runoff in this study. CAS No.: Chemical Abstract Service Registry Number® is a Registered Trademark of the American Chemical Society. CAS recommends the verification of the CASRNs through CAS Client Services^SM. Abbreviation: µg/L, micrograms per liter] 

Analyte	Parameter  code	Method  No.	CAS  No.	Reporting limit (µg/L)
Analyte	Parameter  code	Method  No.	CAS  No.	October 2008–  September 2009	October 2009–  September 2010
Unfiltered water
Arsenic	01002	PLM11	7440-38-2	0.20	0.18
Cadmium	01027	PLM47	7440-43-9	0.06	0.04
Chromium	01034	PLM11	7440-47-3	0.40	0.42
Copper	01042	PLM11	7440-50-8	4.0	1.4
Lead	01051	PLM48	7439-92-1	0.10	0.06
Mercury	02708	CV018	7439-97-6	0.01	0.01
Nickel	01067	PLM11	7440-02-0	0.20	0.36
Selenium	01147	PLM11	7782-49-2	0.12	0.10
Silver	01077	PLM48	7440-22-4	0.06	0.016
Zinc	01092	PLA15	7440-66-6	4.0	4.0
Filtered water
Arsenic	01000	PLM10	7440-38-2	0.06	0.044
Cadmium	01025	PLM43	7440-43-9	0.02	0.02
Chromium	01030	PLM10	7440-47-3	0.12	0.12
Copper	01040	PLM10	7440-50-8	1.0	1.0
Lead	01049	PLM43	7439-92-1	0.06	0.03
Mercury	02707	CV014	7439-97-6	0.01	0.01
Nickel	01065	PLM10	7440-02-0	0.12	0.12
Selenium	01145	PLM10	7782-49-2	0.06	0.04
Silver	01075	PLM43	7440-22-4	0.01	0.01
Zinc	01090	PLA11	7440-66-6	2.0	4.6

Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10

Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10 