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EPA Approval of the Envision for Method 3A
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07.14.09
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Thanks for your patience with my review of your analyzer. From the information supplied, it appears your "Envision" gas analyzer conforms to the requirements of Method 3A for application under 40 CFR 60.753 (c)(2). Method 3A contains performance requirements that allow a range of analyzers to be used without special permission if these requirements are met. Your "Envision" gas analyzer meets these requirements and may be used in the noted application without special permission.
Foston Curtis
Environmental Scientist
US EPA Office of Air Quality Planning & Standards
E143-02
Research Triangle Park, NC 27709
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