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OAR Policy and Guidance Metarecord

Document Title/Subject:
Use of Collocated PM2.5 Data and Parameter Occurrence Codes
Related Documents:
Signed by: David Misenheimer

Signature Date: 12/21/99

Contact:
Michael Papp

Filename(s):

URL(s):
25colo.pdf

Regulatory Authority:
Title 1
Division/Director:
Emissions, Monitoring, and Analysis Division (OAQPS) / David Mobley
Submitted By:
papp.michael
OGC Contact:
Kevin McLean
OGC Phone#:
202-564-5564
Internet Contact:
Jeff Clark
Document Type:
Policy & Guidance Memos
EPA Document Number:

Federal Register:
Supersedes:
Subject Category:
AIR
Keywords:
Particulate matter
Air Quality Monitoring

PM2.5 Collocated Data
Terms:
Air quality
Abstract:
The new guidance is intended to clarify any potential ambiguities in the QA Handbook Method 2.12 and to conform with a July 24, 1989 memorandum on the handling of PM10 collocated data. Accordingly, the memo reiterates that data from a collocated sampler can be substituted for the primary sampler if the primary sampler was not operating or did not produce a valid measurement for that same day. The memo also suggests that State and local agencies enter the substituted collocated data as parameter occurrence codes 2 (POC-2).

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