Standard Operating Procedure (SOP) for Compliance Monitoring ...

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SOP for Compliance Monitoring Using CEMSs precise. Appropriately, all QA/QC program elements should be incorporated into a facility QA Manual. An outline for a CEMS QA Manual is provided in Annex 2. The QA program, which is typically specified in a plant- or source-specific QA Plan, is the basis for assessing and maintaining the quality of CEMS data. A QA program has the following two distinct and equally important functions: 1. Assessment of data quality (accuracy and precision) 2. QC, which involves activities used to maintain or improve data quality. These two functions form a control loop. When the assessment function indicates that data quality is inadequate, the QC function should be applied until data quality is acceptable. The quality and quantity of valid data dictate the amount or degree of QC to be used in the monitoring program. The QA Plan is a valuable tool for the evaluation and improvement of the monitoring system by the source and regulatory personnel. The QA Plan should provide detailed written descriptions of all current QC activities. In this plan, the procedures used to set up the QA program should be stated as a clearly defined set of activities. These activities, or standard operating procedures (SOPs), should also be incorporated into the QA Plan. SOPs provide monitoring descriptions, company QA policies, monitoring system QC procedures, audit procedures, and recordkeeping and reporting requirements. A well-written QA Plan, along with the equipment manufacturer’s operation manuals, provides the CEMS Owner or Operator with most of the necessary information needed for proper monitor operation, maintenance, and QC. Additional information, such as the plant personnel’s experience with the system, should also be incorporated into the QA Plan. When updates or changes to any activities are necessary, the QA Plan should be revised to reflect those changes. This plan should be reviewed and revised by the CEMS Owner or Operator when changes are made to the CEMS procedures (ranging from operation to reporting). 7. Quality Control Requirements A CEMS will provide valid, reliable data when the system is properly maintained and operated. This system should be maintained at regular intervals to ensure that it is operating within prescribed limits. Accordingly, each source Owner or Operator should develop and implement written QC protocols that describe in detail, complete, step-by-step procedures and operations for each of the following activities: • Calibration of the CEMS • Calibration drift determination and adjustment of the CEMS • Preventive maintenance of the CEMS, including a spare parts inventory • Data recording, calculations, and reporting • Accuracy audit procedures, including sampling and analysis methods • Program of corrective action for a malfunctioning CEMS. QC activities are generally performed on a routine basis by the CEMS Operator or are automatically initiated by the CEMS. In either case, the Operator or some other designated individual should promptly review the results of all QC checks and take appropriate follow-up actions to correct any problems. The QA/QC evaluations of CEMS typically include the following: • Daily checks − Calibration drift assessment—This type of assessment is used for zero/low-level and upscale/high-level calibration checks of the monitoring system. • Periodic checks 4
SOP for Compliance Monitoring Using CEMSs − − Performance audit—This type of audit is used to check all of the individual CEMS components and factors affecting the precision and accuracy of monitoring data. Examples of performance audits include the following: cylinder gas audit (CGA), relative accuracy test audit (RATA), and relative accuracy audit (RAA). The RATA is typically performed by a third party, which brings its own measurement equipment to the site to perform a side-by-side comparison with the installed equipment, according to the testing reference method used to determine compliance with the standard. Systems audit—This type of audit is a systematic qualitative review of facilities, equipment, training, procedures, record-keeping, validation, and reporting aspects of a total QA system to determine the system’s capabilities. Other frequent checks (operational or preventive maintenance) may be required depending on the CEMS manufacturer’s instructions and the Operator’s experience with the system. The Owner or Operator should include all additional checks on the daily/weekly/monthly logs. Logs may be either kept on paper or by computerised records. A useful way to chart the type and frequency of operational and maintenance checks is to create an activity matrix. The CEMS manufacturer’s manual is useful in creating this matrix. An example of this type of matrix is presented in Table 3. Table 3. Example of a CEMS QC Activity Matrix Activity Frequency 1. Check system zero and span check results Daily 2. Check cylinder pressures Weekly 3. Check for alarms and any malfunction Daily 4. Check components of dilution system on the CEMS (if applicable) Bi-weekly 5. Check filters, desiccants, and dryers As recommended by the manufacturer 6. Conduct performance audit Quarterly 7. Check shelter temperature of the CEMS Daily Section II. CEMS Monitoring Reports 1. Format and Content of Reports Emissions Data Hourly, daily, and annual emissions data should be provided for each pollutant. Hourly data for each month should be reported in one data table (i.e., for a month with 30 days, there would be 720 hourly values in one table). Daily data should also be provided in one table (i.e., for a month with 30 days, there would 30 daily values in one table). Annual data should be provided on a spreadsheet, with each monthly total as one line. Therefore, a complete report for 1 year would have 25 tables as outlined below: • 12 hourly tables (one for each month), with approximately 720 rows each • 12 monthly tables, with approximately 30 rows each (one for each day) • 1 annual table, with one line for each of the 12 months. Annex 3 contains an example workbook with spreadsheet templates of the various report tables oriented towards natural gas-fired power plants for the three different time intervals described: 1. Annex 3a—Example of a CEMS Hourly Emissions Report 2. Annex 3b—Example of a CEMS Daily Emissions Report 3. Annex 3c—Example of a CEMS Annual Emissions Report. As noted in the example of a CEMS hourly emissions report, periods of instrument calibration or malfunction should be noted in the “Remarks” column. For periods of instrument malfunction or calibration, values entered into this table should be the average of those in the nearest 4 hours before and the nearest 4 hours after instrument malfunction or calibration, provided the plant power during those hours is equal to the power during instrument malfunction, ±10% of the rated power. Annex 3d 5
Page 1 and 2: Standard Operating Procedure (SOP)
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Page 15 and 16: Application of the CEMS at Thermal
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Page 33 and 34: Annex 3 Emissions Monitoring Report
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Standard Operating Procedure (SOP) for Compliance Monitoring ...

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