Null Data Reason Code

Description

A code explaining why no sample, blank, or quality assurance assessment value was reported.

Business Rules

Must be a valid AQS Null Reason Code.

Must not be valued if the Sample Measurement is valued.

Must be valued if the Sample Value or Monitor Assessment is null/empty.

May not be valued on an RD record that also has an exclusion qualifier submitted.

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