Proficiency Testing Sample Providers

The Washington State Department of Ecology has approved the following providers of Proficiency Testing (PT) samples as meeting the requirements of the Laboratory Accreditation Program. Please contact the Lab Accreditation Unit (LAU) to determine if the LAU will accept PT sample results from providers not listed.

Absolute Standards, Inc.
PO Box 5585
Hamden, CT 06518
Telephone (800) 368-1131
FAX (800) 410-2577
www.absolutestandards.com

Advanced Analytical Solutions, LLC
6325 Emerson Avenue
PO Box 4060
Parkersburg, WV 26104-4060
Telephone (304) 485-6325
FAX (304) 485-6971
www.advancedqa.com

ERA
16341 Table Mountain Parkway
Golden, CO 80403
Telephone (800) 372-0122
FAX (303) 421-0159
www.eraqc.com

NSI Solutions, Inc.
7212 ACC Boulevard
Raleigh, NC 27617
Telephone (800) 234-7837
FAX (919) 957-7562
www.nsi-es.com

Sigma-Aldrich RTC
PO Box 1346
2931 Soldier Springs Road
Laramie, WY 82070
Telephone (800) 576-5690
FAX (307) 745-7936
http://www.sigmaaldrich.com/pt

Phenova (formerly Wibby)
A Phenomenex Company
6390 Joyce Drive, Suite 100
Golden, Colorado 80403
Telephone 866-942-2978
FAX 866-942-0269
www.phenova.com