OAR 340-234-0530: Board Products Industries (Veneer, Plywood, Particleboard, Hardboard): Hardboard Manufacturing Operations

(1) Truck Dump and Storage Areas: (a) Every person operating or intending to operate a hardboard manufacturing plant must enclose all truck dump and storage areas holding or intended to hold raw materials to prevent windblown particle emissions from these areas from being deposited upon property not under the ownership of said person; (b) The temporary storage of raw materials outside the regularly used areas of the plant site is prohibited unless the person who desires to temporarily store such raw materials first notifies DEQ and receives written approval: (A) When authorized by DEQ, temporary storage areas must be operated to prevent windblown particulate emissions from being deposited upon property not under the ownership of the person storing the raw materials; (B) Any temporary storage areas authorized by DEQ may not be operated in excess of six (6) months from the date they are first authorized. (c) Alternative Means of Control. Any person who desires to control windblown particulate emissions from truck dump and storage areas other than by enclosure must first apply to DEQ for written authorization to utilize alternative controls. The application must describe in detail the plan proposed to control windblown particulate emissions and indicate on a plot plan the nearest location of property not under ownership of the applicant. (2) Other Emission Sources: (a) For hardboard plants that did not exist during the baseline period, the combined particulate emissions from all emissions sources at the plant must not exceed a plant specific hourly average emission rate, pounds per hour, determined by multiplying the plant production capacity by one pound per 1,000 square feet of production. The plant production capacity is the maximum production in terms of 1000 square feet on a 1/8 inch finished basis for a typical operating shift divided by the number of hours in the operating shift. (b) For hardboard plants that existed during the baseline period, the combined particulate emissions from the plant must not exceed the lesser of: (A) A plant specific hourly average emission rate, pounds per hour, determined by multiplying the plant production capacity by two pounds per 1,000 square feet of production. The plant production capacity is the maximum production in terms of 1,000 square feet on a 1/8 inch finished basis for a typical operating shift divided by the number of hours in the operating shift, or (B) The sum of the baseline emissions rate, pounds per hour, of the press/cooling vent and the lesser of: (i) The baseline emissions rate, pounds per hour, from all sources at the plant, excluding the press/cooling vents; or (ii) A plant specific hourly average emission rate, pounds per hour, determined by multiplying the plant production capacity by one pound per 1,000 square feet of production. The plant production capacity is the maximum production in terms of 1,000 square feet on a 1/8 inch finished basis for a typical operating shift divided by the number of hours in the operating shift. (c) Excepted from subsections (a) and (b) are truck dump and storage areas, fuel burning equipment, and refuse burning equipment. (d) 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) Emissions from Hardboard Tempering Ovens: (a) No person may operate any hardboard tempering oven unless all gases and vapors emitted from said oven are treated in a fume incinerator capable of raising the temperature of said gases and vapors to at least 1500° F. for 0.3 seconds or longer except as allowed by paragraph (b); (b) Specific operating temperatures lower than 1500° F. may be approved by DEQ using the procedures in 40 CFR 63.2262 of the NESHAP for Plywood and Composite Wood Products. NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.