Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 63, Subpt. IIIII, Tbl. 5 Table 5 to Subpart IIIII of Part 63—Required Elements of Floor-Level Mercury Vapor Measurement and Cell Room Monitoring Plans

Floor-Level Mercury Vapor Measurement Plan

1. Locations in the cell room where you will measure the level of mercury vapor

The locations must be representative of the entire cell room floor area. At a minimum you must measure the level of mercury vapor above mercury-containing cell room equipment, as well as areas around the cells, decomposes, or other mercury-containing equipment.

2. Equipment or sampling and analytical methods that you will use to measure the level of mercury vapor

If an instrument or other equipment is used, the plan must include manufacturer specifications and calibration procedures. The plan must also include a description of how you will ensure that the instrument will be calibrated and maintained according to manufacturer specifications.

3. Measurement frequency

Measurements must take place at least once each half day.

4. Number of measurements

At least three readings must be taken at each sample location and the average of these readings must be recorded.

5. A floor-level mercury concentration action level

The action level may not be higher than 0.05 mg/m³.

Cell Room Monitoring Plan

1. Details of your mercury monitoring system.

2. How representative sampling will be conducted

Include some pre-plan measurements to demonstrate the profile of mercury concentration in the cell room and how the selected sampling locations ensure conducted representativeness.

3. Quality assurance/quality control procedures for your mercury monitoring system

Include a description of how you will keep records or other means to demonstrate that the system is operating properly.

4. Your action level

Include the background data used to establish your level.