Required Collection Frequency Code
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Description
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The Required Collection Frequency (RCF).  This is how often a monitor is requried to collect an atmospheric sample.

Business Rules
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Required for PM2.5, PM10, and Photochemical Assessment Monitoring System (PAMS) organic compounds.

Allowable codes depend on the associated parameter.  RCF Code must be '1', '3', '6', or 'S' if Parameter is '88101'.  RCF Code must be in the range 'A' through 'Q' for PAMS paramters.

Must be a valid RCF code.

Must exist on the Protocols table in combination with: parameter code, method code, sample duration code, unit code, and composite type code. 

Allowable values: https://aqs.epa.gov/aqsweb/documents/codetables/collection_frequencies.html