AQS Guidelines for Reporting 5-minute SO2 Data January 3, 2011
Dear AQS User:
Please use these guidelines when reporting the 5-minute SO2 data. (These are specifically for the SO2 reporting changes that were outlined in the November 3, 2010 memo “AQS Technical Note – NAAQS Reporting Issues for NO2 and SO2 NCORE Reporting Issues for NOy and trace-level gases.”)
If you are reporting: Use AQS Use AQS Use POC:
|
maximum 5-minute SO2 average from each hour |
42406 |
1 |
Use of POC 1 is suggested but not required. |
Meets the reporting requirement for SO2 5-minute data. (Other option is to load all the 5-minute data.) |
|---|
|
all of the twelve 5minute averages from each hour |
42401 |
H |
Often 42401 duration “1” data is reported as POC 1, so the use of POC 2 (if available) is suggested but not required. |
Meets the reporting requirement for SO2 5-minute data. (Other option is to load the maximum 5minute average for each hour. See |
|---|
parameter code: duration code: above.)
Since “42401” is also used for hourly SO2 (duration 1) data, a new POC must be established. If you try to load 5-minute data to the existing monitor being used for hourly data, you will get the error: “Sample duration cannot change within a calendar year.”
If using this option, the maximum 5 minute average for each hour does not have to be identified and separately reported. Before loading any 5-minute SO2 raw data into AQS, establish the new monitor with the appropriate parameter and POC.