Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 421 - Control Of Organic Compound Emissions From Chemical, Coatings And Rubber Products Manufacturing
Section NR 421.05 - Synthetic resin manufacturing

(a) Effective October 1, 1986, subs. (2) and (3) (a) and (b) apply to reaction tanks, thinning tanks, blending tanks, and other process vessels used in any synthetic resin manufacturing facility which has maximum theoretical emissions of VOCs from the processes greater than or equal to 100 tons per year and which is located in the county of Kenosha, Milwaukee, Ozaukee, Racine, Washington, or Waukesha.

(b) Effective January 1, 1994, subs. (2) and (3) (a) and (b) apply to reaction tanks, thinning tanks, blending tanks, and other process vessels used in any synthetic resin manufacturing facility which has maximum theoretical emissions of VOCs from the processes greater than or equal to one of the following:

(c) Subsections (2m), (3) (c), and (4) apply to facilities with synthetic resin manufacturing operations as described in par. (a) located in the county of Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington, or Waukesha if VOC emissions from all industrial cleaning operations, before consideration of controls, equal or exceed 3 tons per year on a 12 consecutive month rolling basis.

Note: "Maximum theoretical emissions" has the meaning given in s. NR 419.02(11).

(a) Equip each vent from reaction tanks, and all blending tanks and thinning tanks, with an emission control system which meets one of the conditions listed in this paragraph. Any equally effective control method or equivalent system approved by the department under this paragraph shall be submitted to, and will not become effective for federal purposes until approved by, the administrator or designee as a source-specific revision to the department's state implementation plan for ozone. The emission control system shall be one of the following:

(b) If a surface condenser is used, continuously record the condenser outlet gas temperature, and prevent the condenser outlet gas temperature from exceeding 32°C (90°F).

(c) Enclose all centrifuges, rotary vacuum filters, and any other filters having an exposed liquid surface, where the liquid contains VOCs.

(d) Install covers on all in-process tanks that contain a VOC at any time. Covers shall be closed except for necessary operator access during production, sampling, maintenance or inspection.

(e) Monitor each valve, pump, sealed agitator, compressor, flange, and relief valve used with a process stream which contains at least 10.0% VOCs by weight using Method 21 of Appendix A, 40 CFR part 60, incorporated by reference in s. NR 484.04. The monitoring schedule shall be as follows:

(f) Check bimonthly by visual inspection each valve, pump, sealed agitator, compressor, flange, and relief valve for indications of dripping liquid.

(g) Repair all leaks detected as soon as practicable, but not later than 15 calendar days after leak detection unless the repair is technically infeasible without a process unit shutdown. In the case of such infeasibility, repair shall occur before the end of the next process unit shutdown.

(h) Document to the department all repairs of detectable leaks of VOCs for each calendar quarter. This documentation is to include a description of the equipment that leaked, date of detection, date of repair, dates of follow-up inspection, and an explanation of what caused the leak. This documentation is to be submitted to the department within one month after the close of the calendar quarter during which the leaks were detected and repaired.

(a) Except as provided in par. (b), the owner or operator of a facility subject to this subsection shall use any of the following methods when cleaning mixing vats, high dispersion mills, grinding mills, tote tanks, and roller mills:

(b) The owner or operator of a facility engaged in wipe cleaning may not use open containers for the storage of solvent or solvent solution used for cleaning or for the storage or disposal of any material impregnated with solvent or solvent solution used for cleaning.

(a) Paragraph (b) applies only to a synthetic resin manufacturing facility which is in existence on January 1, 1994 and which meets one of the following criteria:

(b) The owner or operator of any source identified under par. (a) shall:

(c) The owner or operator of a synthetic resin manufacturing facility subject to sub. (2m) shall achieve final compliance with sub. (2m) no later than February 1, 2013.

(a) Except as provided in par. (c) and in addition to the applicable recordkeeping requirements in s. NR 439.04, the owner or operator of a synthetic resins manufacturing facility subject to sub. (2m) shall collect and record the following information, as applicable:

(b) The owner or operator of a synthetic resins manufacturing facility shall maintain the information under par. (a) at the facility for a minimum of 5 years and shall make the information available to an authorized department representative at any time during normal working hours. (c) The provisions of par. (a) do not apply to solvent or solvent solution which is used to clean or flush a mill or vat during the manufacture of a synthetic resin and which is subsequently incorporated into the same batch.