---
kind: "section"
citation: "40 C.F.R. § 49.128"
title: "40"
number: "49.128"
heading: "Rule for limiting particulate matter emissions from wood products industry sources."
url: "https://uscodex.org/cfr/40/49.128"
---

# §49.128. Rule for limiting particulate matter emissions from wood products industry sources.

- (a) **What is the purpose of this section?** This section limits the amount of particulate matter that may be emitted from certain wood products industry sources operating within the Indian reservation to control ground-level concentrations of particulate matter.
- (b) **Who is affected by this section?** This section applies to any person who owns or operates any of the following wood products industry sources:
  - (1) Veneer manufacturing operations;
  - (2) Plywood manufacturing operations;
  - (3) Particleboard manufacturing operations; and
  - (4) **Hardboard manufacturing operations.**
- (c) **What are the PM10 emission limits for wood products industry sources?** These PM10 limits are in addition to, and not in lieu of, the particulate matter limits for combustion sources and process sources.
  - (1) **Veneer dryers at veneer manufacturing operations and plywood manufacturing operations.**
    - (i) PM10 emissions from direct natural gas fired or direct propane fired veneer dryers must not exceed 0.3 pounds per 1000 square feet of veneer dried ( 3/8 inch basis), one-hour average.
    - (ii) PM10 emissions from steam heated veneer dryers must not exceed 0.3 pounds per 1000 square feet of veneer dried ( 3/8 inch basis), one-hour average.
    - (iii) PM10 emissions from wood fired veneer dryers must not exceed a total of 0.3 pounds per 1000 square feet of veneer dried ( 3/8 inch basis) and 0.2 pounds per 1000 pounds of steam generated in boilers, prorated for the amount of combustion gases routed to the veneer dryer, one-hour average.
  - (2) **Wood particle dryers at particleboard manufacturing operation.** PM10 emissions from wood particle dryers must not exceed a total of 0.4 pounds per 1000 square feet of board produced by the plant ( 3/4 inch basis), one-hour average.
  - (3) **Press/cooling vents at hardboard manufacturing operations.** PM10 emissions from hardboard press/cooling vents must not exceed 0.3 pounds per 1000 square feet of hardboard produced ( 1/8 inch basis), one-hour average.
  - (4) **Tempering ovens at hardboard manufacturing operations.** A person must not operate any hardboard tempering oven unless all gases and vapors are collected and treated in a fume incinerator capable of raising the temperature of the gases and vapors to at least 1500 degrees Fahrenheit for 0.3 seconds or longer.
- (d) **What is the reference method for determining compliance?** The reference method for determining compliance with the PM10 limits is EPA Method 202 in conjunction with Method 201A. A complete description of these methods is found in appendix M of [40 CFR part 51](/cfr/40/part51.md).
- (e) **Definitions of terms used in this section.** The following terms that are used in this section are defined in [§ 49.123](/cfr/40/49.123.md) General provisions: Act, combustion source, emissions, hardboard, particleboard, particulate matter, plywood, PM10, PM2.5, press/cooling vent, process source, tempering oven, veneer, veneer dryer, wood, and wood-fired veneer dryer.

## Notes

### Source

Source: 70 FR 18095, Apr. 8, 2005, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401, et seq.

### Source

Source: 63 FR 7271, Feb. 12, 1998, unless otherwise noted.