QA - SRP¶
SRP = Stanard Reference Photometer
On February 8, 1979 (Federal Register, 44:8221-8233), the U.S. Environmental Protection Agency amended Appendix D of Title 40, Code of Federal Regulations (CFR), Part 50, to prescribe a calibration procedure for the calibration of reference methods for measuring ozone in the atmosphere. The procedure is based on the use of ultraviolet (UV) photometry as the authoritative standard for ozone and allows the use of transfer standards for the calibration of ambient ozone monitors, provided such transfer standards are adequately referenced to a UV ozone standard of higher authority (level) and traceability.
The document discusses how various levels of transfer standards are verified and traceable to an authoritative NIST standard.
The transaction can be used to report:
NIST Level 1 SRP verifications to the EPA RTP Level 1 SRPs
EPA RTP Level 1 SRPs to EPA Regional Level 1 SRPs
EPA Regional Level 1SRPs to monitoring organization Level 2 transfer standards
monitoring organization Level 2 transfer standards to monitoring organization Level 3 transfer standards
monitoring organization Level 3 transfer standards to monitoring organization Level 4 transfer standards
6 by 6 verifications
Re-verification (new point to 6 by 6)
In the case of each transaction the authoritative standard is the standard “closer” in traceability to the NIST standard.
Format¶
Seq. |
Name |
Description |
Formatting Rules |
Required |
Key |
---|---|---|---|---|---|
1 |
Quality Assurance transaction identifier. |
Must = QA |
Always |
||
2 |
Indicator for Insert, Update, or Delete action. |
Must = I, U, or D |
Always |
||
3 |
Indicates the specific QA assessment associated with the transaction. |
Must = SRP |
Always |
Y |
|
4 |
6X6 is for the initial verification of a new standard ozone generator. “Standard” is for a routine SRP assessment. |
Must = 6X6 or Standard |
Always |
Y |
|
5 |
Agency Code of organization performing assessment. |
Must exist in AGENCIES reference table. |
Always |
Y |
|
6 |
Agency Code of organization responsible for the quality of data for Monitoring Organization. |
Must exist in AGENCIES Reference Table. |
Always |
Y |
|
7 |
The AQS parameter code. |
Must = 44201 |
Always |
Y |
|
8 |
Unique ID for Authoritative standard. |
Must exist on SRP STANDARDS reference table. |
Always |
Y |
|
9 |
Primary EPA standard is Level 1, those validated against it are level 2, and those validated against level 2 standards are level 3. |
Number; must be 1, 2, or 3. |
Always |
Y |
|
10 |
Unique ID code (serial number) for transfer standard |
Text (up to 40 characters). |
Always |
Y |
|
11 |
Level 1, 2, 3, 4 transfer standard has to be equal or a higher number then the Authoritative Standard |
Decimal; must be >= authoritative standard. |
Always |
Y |
|
12 |
Date that the assessment was performed. |
YYYYMMDD. |
Always |
Y |
|
13 |
A unique number associated with an assessment performed at a site on a given day. Value should be “1” unless additional assessments are performed. |
Integer. |
Always |
Y |
|
14 |
Units associated with the assessment concentrations (Monitor Concentration and Check Standard Concentration). |
Must exist in UNITS reference table, and unit code must be for Concentration units type. |
Unless Delete |
||
15 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
16 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
17 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
18 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
19 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
20 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
21 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
22 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
23 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
24 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
25 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
26 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
27 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
28 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
29 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
30 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
31 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
32 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |
||
33 |
Measurement from instrument being assessed. |
Decimal. |
Insert |
||
34 |
Measurement from authoritative standard instrument. |
Decimal. |
Insert |