| Regulatory Agency | Phone |
| 1-800-424-4EPA | |
| * EPA Hotline | |
| 1-800-668-6767 | |
| (208) 373-0502 | |
| * Boise Regional Office | (208) 373-0550 |
| * Coeur d'Alene Regional Office | (208) 769-1422 |
| * Idaho Falls Regional Office | (208) 528-2650 |
| * Lewiston Regional Office | (208) 799-4370 |
| * Pocatello Regional Office | (208) 236-6168 |
| * Twin Falls Regional Office | (208) 736-2190 |
|
|
(503) 229-5696 |
| * LRAPA (Lane Regional Air Pollution Authority) | (541) 736-1056 |
| (360) 407-6000 | |
|
|
(509) 329-3400 |
| (425) 649-7000 | |
| - Southwest Region | (360) 407-6300 |
| - Central Region | (509) 575-2490 |
| - Kennewick Office | (509) 785-7581 |
|
* |
(509) 943-3396 |
|
* |
(360) 428-1617 |
|
* |
1-800-552-3565 |
|
* |
(509) 477-4727 |
|
* |
(360) 574-3058 |
| * YRCAA (Yakima Regional Clean Air Authority) | (509) 574-1410 |
| Technical Resources | Phone |
| AP42 Emission Factors (See Emission Factors) | |
| Professional Resources | Phone |
| (412) 232-3444 | |
|
|
N/A |
| (410) 266-3311 | |
| Environmental Services Directory for Washington State | (206) 282-2591 |
| (703) 684-2800 | |
| WSPE (Washington State Chapter of NSPE) | 1-888-829-2852 |
| (888) 272-2435 | |
| Spokane Business List (We're listed) | |
| (509) 624-1393 | |
| . | |
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