Methods

 

Air Testing Methods

EAS is an Air Testing Laboratory that specializes in the analysis of air and gas samples for organic compounds and inorganic gases.    Our testing services are based on analytical methods that have been developed for air testing, or methods that have been modified for air testing. 

The analytical methods used by Environmental Analytical Service, Inc. (EAS) follow established agency methods for testing air, gas, source, or product samples.  Most of the methods used are modifications to the referenced method (see discussion below). The source of common air testing methods is listed below:

Method Source

Method Designation

Method Type

EPA TO

Toxic Organic (TO)

Ambient Air, Indoor Air

EPA IP

Indoor (IP)

Indoor Air

EPA

EPA (Number)

Source Test Method

ASTM

ASTM

Product, Source

NIOSH

NIOSH

Indoor Air, Ambient Air

Local, State, and Air District Methods

CARB, SCAQMD, BAAQMD, etc.

Source

Most of the Local, State, and Air District Methods are similar to the EPA methods but can have different Compound Lists, QC Requirements, and Sample Collection Requirements.  EAS does these methods and treats them as Project Specific methods with special compound lists and QC requirements.  The EPA IP methods for indoor air testing are very similar to the TO methods, so the TO methods are often requested in place of them.

Modified Methods

In order to provide our clients with the latest technological improvements and the most extensive target compound lists, EAS (like most air labs) uses modified methods.  Most laboratories use modified EPA TO Compendium methods because the published methods were originally prepared as a guidance document.  These published methods often lack specifics on target compounds or have unrealistic QC requirements established for a limited list of compounds or estimated from other methods.  For example, ASTM methods (for compounds such as methane) were originally written for petroleum testing but have been modified for use in ambient air analysis.  All methods that have been modified are designated “modified” on the analytical reports. 

Methods used for source testing follow established and well-documented methods and can be run with no modification for compliance tests if requested in advance.