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The PAMS AutoGC systems collect not only hourly ambient air data but also have Quality Control samples which are outlined in the EPA PAMS Technical Assistance Guidance document (**TAD**). | The PAMS AutoGC systems collect not only hourly ambient air data but also have Quality Control samples which are outlined in the EPA PAMS Technical Assistance Guidance document (**TAD**). | ||
- | * Quality Control Sample Types | + | |
+ | - Calibration Verification Standard (CVS) or Continuing Calibration Verification (CCV) Standard | ||
+ | * Required daily | ||
+ | * Used to confirm system response daily; recoveries generally ± 30% specified in the Network configuration | ||
+ | - System Blank (SB) or Method Blank | ||
+ | * Required daily | ||
+ | * Used to determine concentrations of target compounds which may be contributed by the analytical system | ||
+ | - Laboratory Calibration Standard (LCS) or Second Source Calibration Verification (SSCV) Standard | ||
+ | * Required weekly | ||
+ | * Used to confirm original calibration by reference. | ||
+ | - Retention Time Standard (RTS) | ||
+ | * Required weekly | ||
+ | * Used to verify correct target identification by retention time windows in method. | ||
| | ||
+ | === Format for Incoming Data - ASCII Text === | ||
+ | The output format for data generated by the analytical data system must adhere to a specific ASCII text format to enable MAX to be able to correctly interpret and store the data. Orsat has generated output formats for both the Totalchrom and EZChrom data systems. | ||
+ | * Required Input from Analytical System | ||
+ | * Instrument Name - (Format " | ||
+ | * Filename - specific format (see File Naming) | ||
+ | * Acquisition Time - the time the analytical data collection started. | ||
+ | * Process Date and time- the time the data file was generated | ||
+ | * Sample Name, generally Blank, Standard, Ambient Air, IQ-RTS, CS-LCS | ||
+ | * Instrument Name | ||
+ | * Instrument method filename | ||
+ | * Sequence filename | ||
+ | |||
+ | MAX was designed to identify the QC control samples by using a specific file naming paradigm. | ||
+ | |||
+ | Filename structure.png | ||
+ | |||
+ | | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== Network and Site Configuration ==== | ||
In order to allow the evaluation of these QC samples each data set or //Site// has a definition which incorporates configuration parameters for the //Network// which defines information about incoming data such as a list of target VOCs, which targets will be in the QC samples and their concentrations and control limits. | In order to allow the evaluation of these QC samples each data set or //Site// has a definition which incorporates configuration parameters for the //Network// which defines information about incoming data such as a list of target VOCs, which targets will be in the QC samples and their concentrations and control limits. | ||
- | | + | === Information Required for Network Configuration === |
- Units (default is ppbC) | - Units (default is ppbC) | ||
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Each Site also has unique information to identify it in the database. | Each Site also has unique information to identify it in the database. | ||
+ | === Information Required for Site Configuration === | ||
+ | - Site name (defined in the incoming ASCII text file as " | ||
+ | - Type - designation of data system generating the data, PerkinElmer or EZChrom | ||
+ | - Minimum display value - generally 0 | ||
+ | - Network assigned to the site | ||
+ | - AQS number assigned to the site | ||
+ | - POC if necessary | ||
+ | - Short name - user entered text field | ||
+ | - Formal name - user entered text field | ||
+ | - Address, City and Zipcode | ||
+ | - Latitude and Longitude | ||
+ | - UTC offset | ||
+ | - CAMS code (if available) | ||
+ | - Interval, units code and method codes required for AQS file generation | ||
+ | ---- | ||
| | ||
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* | * | ||
+ | ---- | ||
**References** | **References** |