40 CFR Part 63, Table 1
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
As stated in § 63.2998(c), you must comply with the minimum requirements for monitoring and recordkeeping in the following table:
| You must monitor these parameters: | At this frequency: | And record for the monitored parameter: |
|---|---|---|
| 1. Thermal oxidizer temperature 1 4 | Continuously | 15-minute and 3-hour block averages. |
| 2. Other process or control device parameters specified in your OMM plan 2 4 | As specified in your OMM plan | As specified in your OMM plan. |
| 3. Urea-formaldehyde resin solids application rate 4 | On each operating day, calculate the average lb/h application rate for each product manufactured during that day | The average lb/h value for each product manufactured during the day. |
| 4. Resin free-formaldehyde content 4 | For each lot of resin purchased | The value for each lot used during the operating day. |
| 5. Loss-on-ignition 3 4 | Measured at least once per day, for each product manufactured during that day | The value for each product manufactured during the operating day. |
| 6. UF-to-latex ratio in the binder 3 4 | For each batch of binder prepared the operating day | The value for each batch of binder prepared during the operating day. |
| 7. Weight of the final mat product per square (lb/roofing square) 3 4 | Each product manufactured during the operating day | The value for each product manufactured during the operating day. |
| 8. Average nonwoven wet-formed fiberglass mat production rate (roofing square/h) 3 4 | For each product manufactured during the operating day | The average value for each product manufactured during operating day. |
1 Required if a thermal oxidizer is used to control formaldehyde emissions.
2 Required if process modifications or a control device other than a thermal oxidizer is used to control formaldehyde emissions.
3 These parameters must be monitored and values recorded, but no operating limits apply.
4 You are not required to monitor or record these parameters during periods when using a non-HAP binder. If you do not monitor these parameters during periods when using a non-HAP binder, you must record the dates and times that production of mat using the non-HAP binder began and ended.
[84 FR 6697, Feb. 28, 2019]