Section NR 440.25 - Asphalt concrete plants(1) APPLICABILITY AND DESIGNATION OF AFFECTED FACILITY. (a) The affected facility to which the provisions of this section apply is each hot mix asphalt facility. For the purpose of this section, a hot mix asphalt facility is comprised only of any combination of the following: dryers; systems for screening, handling, storing and weighing hot aggregate; systems for loading, transferring and storing mineral filler; systems for mixing hot mix asphalt; and the loading, transfer and storage systems associated with emission control systems.(b) Any facility under par. (a) that commences construction or modification after June 11, 1973, is subject to the requirements of this section. (2) DEFINITIONS. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02. (a) "Hot mix asphalt facility" means any facility, as described in sub. (1), used to manufacture hot mix asphalt by heating and drying aggregate and mixing with asphalt cement. (3) STANDARD FOR PARTICULATE MATTER.(a) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may discharge or cause the discharge into the atmosphere from any affected facility any gases which: 1. Contain particulate matter in excess of 90 mg/dscm (0.039 gr/dscf).2. Exhibit 20% opacity, or greater.(4) TEST METHODS AND PROCEDURES. (a) In conducting the performance tests required in s. NR 440.08, the owner or operator shall use as reference methods and procedures the test methods in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, or other methods and procedures as specified in this subsection, except as provided in s. NR 440.08(2).(b) The owner or operator shall determine compliance with the particulate matter standards in sub. (3) as follows: 1. Method 5 shall be used to determine the particulate matter concentration. The sampling time and sample volume for each run shall be at least 60 minutes and 0.90 dscm (31.8 dscf).2. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.Wis. Admin. Code Department of Natural Resources NR 440.25
Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (1) (a), (2) (intro.) and (a), (3) (a) 1., Register, September, 1990, No. 417, eff. 10-1-90; r. and recr. (4), Register, July, 1993, No. 451, eff. 8-1-93.