(a) You must meet each work practice requirement in Table 3 to this subpart that applies to you.

(b) As provided in § 63.6(g), we, the EPA, may choose to grant you permission to use an alternative to the work practice requirements in this section.

(c) If you have a dry rotary dryer, you may choose to designate your dry rotary dryer as a green rotary dryer and meet the more stringent compliance options and operating requirements in § 63.2240 for green rotary dryers instead of the work practices for dry rotary dryers. If you have a hardwood veneer dryer or veneer redryer, you may choose to designate your hardwood veneer dryer or veneer redryer as a softwood veneer dryer and meet the more stringent compliance options and operating requirements in § 63.2240 for softwood veneer dryer heated zones instead of the work practices for hardwood veneer dryers or veneer redryers.

(d) The following combustion unit tune-up and bypass stack monitoring requirements must be conducted for all direct-fired dryers (including direct wood-fired PCWP dryers, direct natural gas-fired PCWP dryers, and direct-fired lumber kilns) by the dates specified in § 63.2233(e) and table 3 to this subpart. You must conduct an annual tune-up of each combustion unit used to directly-fire the PCWP dryer or lumber kiln following the procedures in § 63.2271(c) as specified in paragraphs (d)(1) through (3) of this section. You must monitor usage of combustion unit bypass stacks (defined in § 63.2292) following the procedures specified in § 63.2269(k) by the compliance date specified in § 63.2233(e).

(1) The initial tune-up must be completed by the compliance date specified in § 63.2233(e). After the initial tune-up, each annual tune-up is required to be completed no more than 13 months after the previous tune-up.

(2) If a combustion unit that direct-fires a PCWP dryer or lumber kiln is not operating on the required date for a tune-up, the tune-up must be conducted within 30 calendar days of startup of the combustion unit for the purpose of direct-firing a PCWP dryer or lumber kiln.

(3) For combustion units with tune-up requirements in this subpart, you may use documentation (required in § 63.7550(c)(1)) of the tune-up conducted according to §§ 63.7515(d) and 63.7540(a)(10), in place of the annual combustion unit tune-up requirements in this paragraph (d) and § 63.2271(c), provided the documentation required in § 63.7550(c)(1) is provided according to the schedule in paragraphs (d)(1) and (2) of this section.

(e) For each lumber kiln, you must minimize lumber over-drying to reduce HAP emissions by meeting the requirements in paragraphs (e)(1) through (4) of this section by the dates specified in § 63.2233(e) and table 3 to this subpart.

(1) Lumber kiln operation and maintenance (O&M). Develop and maintain onsite an O&M plan for the lumber kilns at the facility. The O&M plan must include the kiln maintenance, charge optimization, inspection, and corrective action elements specified in § 63.2253(a).

(2) Lumber kiln burner tune-up. For direct-fired lumber kilns, conduct annual burner tune-ups according to paragraph (d) of this section and § 63.2271(c).

(3) Lumber kiln work practice. Minimize lumber over-drying by operating according to one of the work practice options in paragraph (e)(3)(i), (ii), or (iii) of this section.

(i) Temperature limit option. Operate the lumber kiln with a maximum dry bulb temperature limit of no more than 210 °F for batch indirect fired (IF) kilns, 235 °F for batch direct-fired (DF) kilns, 245 °F for continuous IF kilns, or 245 °F for continuous DF kilns. You must continuously monitor and record the dry bulb temperature during the kiln drying cycle according to § 63.2269(m) and maintain the batch cycle average dry bulb temperature (for batch kilns) or daily block average dry bulb temperature (for continuous kilns) below the maximum limit specified in this paragraph (e)(3)(i) according to § 63.2270(h)(1).

(ii) Hybrid option. Operate the lumber kiln according to paragraphs (e)(3)(ii)(A) and (B) of this section.

(A) Operate the lumber kiln with a maximum dry bulb temperature limit of no more than 240 °F for batch indirect fired (IF) kilns, 250 °F for batch direct-fired (DF) kilns, 260 °F for continuous IF kilns, or 260 °F for continuous DF kilns. You must continuously monitor and record the dry bulb temperature during the kiln drying cycle according to § 63.2269(m) and maintain the batch cycle average dry bulb temperature (for batch kilns) or daily block average dry bulb temperature (for continuous kilns) below the maximum limit specified in this paragraph (e)(3)(ii)(A) according to § 63.2270(h)(1).

(B) Operate the kiln to dry to a semiannual average lumber moisture content (weight percent, dry basis) at or above the minimum limit of moisture content considered to be over-dried lumber as specified in paragraph (e)(4) of this section and table 11 of this subpart. Lumber moisture must be monitored and recorded according to § 63.2269(n). The semiannual average must be determined according to § 63.2270(i).

(iii) Site-specific plan option. Develop and operate according to a site-specific plan to minimize lumber over-drying through temperature and lumber moisture monitoring as required in paragraphs (e)(3)(iii)(A) and (B) of this section. The site-specific plan must be submitted to the delegated authority for approval and the site-specific limits from the plan must be incorporated into the facility's operating permit as specified in § 63.2253(b).

(A) The site-specific plan must identify one temperature parameter (such as wet or dry bulb temperature, wet bulb depression, or temperature drop across the load) to be continuously monitored during the kiln drying cycle; include a description of how the temperature parameter is measured and used to minimize over-drying of lumber; and include a site-specific limit for the temperature parameter that minimizes over-drying. You must continuously monitor and record the temperature parameter according to § 63.2269(m) and calculate the 3-hour block average for comparison to the site-specific temperature limit according to § 63.2270(h)(2).

(B) The site-specific plan must include a method for monitoring lumber moisture content (weight percent, dry basis); specify the location of such monitoring within the lumber manufacturing process (for example, at the kiln unloading track, in lumber storage, or at the planer); specify the minimum kiln-dried lumber moisture content limit based on the lumber moisture specifications produced at the facility based on paragraph (e)(4) of this section and table 11 of subpart DDDD; and adhere to the minimum data and lumber moisture content averaging requirements in §§ 63.2269(o) and 63.2270(j).

(4) Over-dried lumber. As used in this subpart, the “maximum lumber moisture specification” means the upper limit of lumber moisture content (weight percent on a dry basis) that meets the relevant lumber grade standard for a lumber product. For each maximum lumber moisture specification, table 11 to this subpart provides the corresponding minimum kiln-dried lumber moisture content limits below which lumber is considered to be over-dried for purposes of this subpart.

(f) By the dates specified in § 63.2233(e) and table 3 to this subpart, you must operate each log vat using a site-specific target log temperature that does not exceed 212 °F measured in the water used to soak the logs or in the wood as it is cut from the log.

(g) By the dates specified in § 63.2233(e) and table 3 to this subpart, you must meet the work practice standards in paragraphs (g)(1) and (2) of this section for resinated material handling process units, including resin tanks, softwood and hardwood plywood presses, engineered wood product presses and curing chambers, blenders, formers, finishing saws, finishing sanders, panel trim chippers, and reconstituted wood products board coolers (at existing affected sources), hardboard humidifiers, and onsite wastewater treatment operations specifically associated with PCWP manufacturing.

(1) You must meet one of the resin-related requirements in paragraphs (g)(1)(i) through (iii) of this section.

(i) Use only a non-HAP resin as defined in § 63.2292; or

(ii) Use only a resin with maximum true vapor pressure (defined in § 63.2292) of less than or equal to 13.1 kPa (1.9 psia) if the resin is stored in resin tanks with capacity of less than 40,000 gallons, or use only a resin with maximum true vapor pressure (defined in § 63.2292) of less than 5.2 kPa (0.75 psia) if the resin is stored in one or more resin tanks with capacity of 40,000 gallons or more; or

(iii) Use a combination of resins meeting either paragraph (g)(1)(i) or (ii) of this section.

(2) Process wood material that was purchased pre-dried to a moisture content of no more than 30 percent (weight percent, dry basis), or has been dried in a dryer located at the PCWP facility. This paragraph (g)(2) does not apply for wet formers and onsite wastewater treatment operations specifically associated with PCWP manufacturing.