OAR 340-234-0510: Board Products Industries (Veneer, Plywood, Particleboard, Hardboard): Veneer and Plywood Manufacturing Operations

(1) Veneer Dryers: (a) Consistent with OAR 340-234-0500(1) through (3), it is the object of this section to control air contaminant emissions, including, but not limited to, condensable hydrocarbons such that visible emissions from each veneer dryer are limited to a level which does not cause a characteristic "blue haze" to be observable; (b) No person may operate any veneer dryer such that visible air contaminants emitted from any dryer stack or emission point exceed: (A) A daily average operating opacity of 10 percent on more than two days within any 12-month period, with the days separated from each other by at least 30 days, as measured by EPA Method 9; and (B) A maximum opacity of 20 percent at any time as measured by EPA Method 9. (c) Particulate emissions from wood fired veneer dryers may not exceed: (A) 0.75 pounds per 1,000 square feet of veneer dried (3/8 inch basis) for units using fuel which has a moisture content equal to or less than 20 percent by weight on a wet basis as measured by ASTM D4442-84; (B) 1.50 pounds per 1,000 square feet of veneer dried (3/8 inch basis) for units using fuel which has a moisture content greater than 20 percent by weight on a wet basis as measured by ASTM D4442-84; or (C) 0.40 pounds per 1,000 pounds of steam generated in boilers which exhaust gases to the veneer dryer. (d) Exhaust gases from fuel burning equipment vented to the veneer dryer are exempt from OAR 340-228-0210; (e) Each veneer dryer must be maintained and operated at all times such that air contaminant generating processes and all contaminant control devices must be at full efficiency and effectiveness so that the emission of air contaminants are kept at the lowest practicable levels; (f) No person may willfully cause or permit the installation or use of any means, such as dilution, which, without resulting in a reduction in the total amount of air contaminants emitted, conceals an emission which would otherwise violate this rule; (g) Where effective measures are not taken to minimize fugitive emissions, DEQ may require that the equipment or structures in which processing, handling, and storage are done, be tightly closed, modified, or operated in such a way that air contaminants are minimized, controlled, or removed before discharge to the open air; (h) DEQ may require more restrictive emission limits than provided in subsections (1)(b) and(c) for an individual plant upon a finding by the EQC that the individual plant is located or is proposed to be located in a special problem area. The more restrictive emission limits for special problem areas may be established on the basis of allowable emissions expressed in opacity, pounds per hour, or total maximum daily emissions to the atmosphere, or a combination thereof. (2) Other Emission Sources: (a) The combined particulate emissions from veneer and plywood mill sources, including, but not limited to, sanding machines, saws, presses, barkers, hogs, chippers, and other material size reduction equipment, process or space ventilation systems, and truck loading and unloading facilities must not exceed a plant specific average hourly emission rate, pounds/hour, determined by multiplying the plant production capacity by one pound per 1,000 square feet. The plant production capacity is the maximum production in terms of 1,000 square feet on a 3/8 inch basis of finished product for a typical operating shift divided by the number of hours in the operating shift. (b) Excepted from subsection (2)(a) are veneer dryers, fuel burning equipment, and refuse burning equipment. (c) Compliance with the average hourly emission rate is determined by summing the emissions from the affected sources as determined by emission factor calculations or actual emissions data for a 24 hour period divided by 24. (3) Monitoring and Reporting: DEQ may require any veneer dryer facility to establish an effective program for monitoring the visible air contaminant emissions from each veneer dryer emission point. The program must be reviewed and approved by DEQ and must consist of the following: (a) A specified minimum frequency for performing visual opacity determinations on each veneer dryer emission point; (b) All data obtained must be recorded on copies of a "Veneer Dryer Visual Emissions Monitoring Form" provided by DEQ or on an alternative form which is approved by DEQ; and (c) A specified period during which all records must be maintained at the mill site for inspection by authorized representatives of DEQ. [NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.] [NOTE: Publications referenced are available from the agency.] [NOTE: View a PDF of referenced EPA Methods by clicking on “Tables” link below.] [ED. NOTE: To view attachments referenced in rule text, click here to view rule.]