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Comm. Code explanation
| Certificate # | Laboratory | Contact | City, State | Country | Phone | Fax | Comm. Code |
Field of Testing |
| 2060.01 | MeasurePT Inc. | Jeff Gust | Columbia City, IN | U.S.A. | 260 244 7450 | 260 244 7905 | C1 | Proficiency Testing Provider |
| 2337.01 | National Association for Proficiency Testing | Charles Ellis | Wayzata, MN | U.S.A. | 952 303 6126 | 305 425 5728 | C1 | Proficiency Testing Provider |
| 2122.01 | Resource Technology Corporation (RTC) | Christopher Rucinski | Laramie, WY | U.S.A. | 307 742 5452 | 307 745 7936 | C1 | Proficiency Testing Provider |
| 2125.01 | Proficiency Testing Australia | Philip Briggs | Silverwater NSW 2128, | AUSTRALIA | 61 2 9736 8397 | 61 2 9743 6664 | C1 | Proficiency Testing Provider |
| 1734.02 | Newage Testing Instruments, Inc. | Douglas McGhee | Feasterville, PA | U.S.A. | 215 354 1877 | 215 354 1803 | C1 | Proficiency Testing Provider |
| 2298.01 | Canadian Association For Laboratory Accreditation (CALA) | Ken Middlebrook | Ottawa, ON K1Z 8R1, | CANADA | 613 233 5300 | 613 233 5501 | C1 | Proficiency Testing Provider |
| 1782.01 | AOAC International | Arlene Fox | Gaithersburg, MD | U.S.A. | 301 924 7077 x 143 | 301 924 7089 | C1 | Proficiency Testing Provider |
| 1539.01 | Environmental Resource Associates, Inc. | Curtis Wood | Arvada, CO | U.S.A. | 303 431 8454 | 303 421 0159 | C1 | Proficiency Testing Provider |
| 1785.01 | NYS DOH Environmental Laboratory Approval Program | Kenneth Aldous | Albany, NY | U.S.A. | 518-485-5570 | 518-485-5568 | C2 | Proficiency Testing Provider |
| 1966.01 | HN Proficiency Testing, Inc. | Henrik Nielsen | Indianapolis, IN | U.S.A. | 317 713 2988 | 1 866 792 2286 | C1 | Proficiency Testing Provider |
| 2427.01 | Wibby Environmental | Chuck Wibby | Golden, CO | U.S.A. | 303 940 0033 x201 | 303 940 0043 | C1 | Proficiency Testing Provider |
| 2429.01 | Absolute Standards, Inc. | Stephen Arpie | Hamden, CT | U.S.A. | 800 368 1131 | 800 410 2577 | C1 | Proficiency Testing Provider |
| 2430.01 | Analytical Products Group, Inc. | Melissa McNamara | Belpre, OH | U.S.A. | 1-800-272-4442 | 740 423 5588 | C1 | Proficiency Testing Provider |
| 2432.01 | NSI Solutions, Inc. | Mark Hammersla | Raleigh, NC | U.S.A. | 800 234 7837 | 919 957 7562 | C1 | Proficiency Testing Provider |
| 2532.01 | Microcheck, Inc. | Courtney Williamson | Northfield, VT | U.S.A. | 802 485 6600 x27 | 802 485 6100 | C1 | Proficiency Testing Provider |
| 2377.02 | U.S. Department of Energy Radiological and Environmental Sciences Laboratory | Anita Bhatt | Idaho Falls, ID | U.S.A. | (208) 526-2143 | (208) 526-2548 | C3 | Proficiency Testing Provider |
| 2671.01 | RTI International | Bruce Harvey | Research Triangle Park, NC | U.S.A. | 919 541 6573 | 919 541 7386 | C2 | Proficiency Testing Provider |
A2LA recommends that, whenever possible, A2LA-accredited testing and calibration laboratories use accredited PT providers to meet the A2LA requirements for participation in proficiency testing. However, we recognize that accredited PT providers may not be available for all technical disciplines, or that specific accreditation programs may mandate participation in other comparisons. As such, the attached list provides information on other programs of which we are aware. This list does not describe all programs that may be available, but if there is no accredited alternative and if the samples offered by the other programs listed are relevant to the work your laboratory performs, we recommend that you contact them to discuss enrollment options.