Test Methods

This page lists some of the most common source test methods we use. We have extensive experience performing California Air Resources Board (CARB) test methods, Bay Area Air Quality Management District (BAAQMD) test methods, and EPA test methods. As a general rule of thumb, CARB test methods are accepted by all regulatory agencies within the state of California, BAAQMD test methods are accepted only by the BAAQMD, and EPA methods are accepted nationwide. If your source is mobile and you need to submit your test report to multiple agencies, the use of EPA test methods is recommended.


The following are continuous emissions monitoring test methods using gas analyzers. These methods provide real time data for the specified analyte.

AnalyteCARB Test MethodsEPA Test MethodsBAAQMD Test Methods
Nitrogen Oxides (NOx)1007EST-13A
Carbon Monoxide (CO)10010ST-6
Sulfur Dioxide (SO2)1006CST-19A
Oxygen (O2)1003A, 3BST-14
Carbon Dioxide (CO2)1003A, 3BST-5
Organic Compounds,
Hydrocarbons, VOCs
Multiple Compounds
Relative Accuracy Test
Audit of a Continous
Emissions Monitoring
System (CEMS)
 40 CFR, Part 60,
Appdx B, Perf. Spec. 1-7
and Part 75
Field Accuracy Test
Alternative Monitoring
System (AMS)
Validation Testing
SJVAPCD: Source Test
Requirements for Alternative
Monitoring Schemes
Relative Accuracy Test
Audit of a Predictive
Emissions Monitoring
System (PEMS)
 Example Performance

Particulate Sampling

The following are non-continuous emissions monitoring test methods. For many of these methods, a sample is collected in the field and is taken to either Best Environmental's laboratory or to an outside lab, depending on the required analyses.

AnalyteCARB Test MethodsEPA Test MethodsBAAQMD Test Methods
Total Particulates, PM105, 175, 17, 201A, 202ST-15
Particulate Sizing501  
Ammonia (NH3)  ST-1B
Ethanol (C2H6O)  ST-32
Visual Emissions Evaluation (VEE) 9 
Sulfur Dioxide (SO2)66 
Sulfur Oxides (SO2, SO3),
Sulfuric Acid Mist (H2SO4)
Hydrochloric Acid (HCl),
Hydrofluoric Acid (HF),
gaseous chloride and flurode
Hydrogen Sulfide (H2S)1111ST-28
Multiple Metals43629 
Ethylene Oxide (on-site GC)431  
Benzene410A, 410B  
Total Reduced Sulfur (TRS)16A15, 16ST-21
Polycyclic Aromatic
Hydrocarbons (PAH)
Polychlorinated Dibenzo-P-Dioxin (PCDD),
Polychlorinated Dibenzofuran (PCDF),
Polychlorinated Biphenyle (PCB)
Phenolic Compounds429ST-16
Total and Hexavalent Chromium425306ST-35
Halogenated Organics42218 
Vinyl Chloride106106ST-29
Butadiene (on-site GC)422.102  
Volatile Organic Compounds (VOCs)422204B, 204C 
Formaldehyde, Acetaldehyde,
and Acrolein

This is in no way a complete list. If you need testing for a compound not listed here, please contact us.

Updated 22 November 2011.

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