US EPA Documents and Methods

US EPA Stationary Test Methods
Promulgated Test Methods 
Proposed Test Methods
Approved Alternative Test Methods
EMC Conditional Test Methods
Preliminary Test Methods
EPA Quality Assurance Handbooks

EPA Emission Measurement Center Technical Support
EPA Emission Measurement Center Directory
EPA Emission Measurement Center Information Documents

CARB Test Methods (California Air Resources Board)

Test Methods for Evaluating Solid Waste (SW-846)

Air Pollutants

Continuous Emission Monitoring

Performance Specifications and Other Monitoring Information

Other Government Agencies
NIOSH Manual of Analytical Methods
OSHA Analytical Methods
ASTM Standards
EERC Energy and Environmental Research Center
SES Source Evaluation Society

Organizations
AWMA Air and Waste Management Association
CAPCA Carolinas Air Pollution Control Association
EPRI Electric Power Research Institute
EUEC Electric Utilities Environmental Conference
NCASI National Council for Air and Stream Improvement, Inc.

Training
Air Pollution Training Institute
Summa Consultants, Inc.
University of Cincinnati
Walter Smith and Associates, Inc.
EnviroTech Solutions