Wis. Admin. Code Department of Natural Resources NR 252.02

Current through October 28, 2024

Section NR 252.02 - General definitions

In addition to the definitions set forth in 40 CFR Part 401, the following definitions apply to this chapter:

(1) "Chrome tan" means the process of converting hide into leather using a form of chromium.

(2) "Existing source" means any source that is not a new source.

(3) "Hair pulp" means the removal of hair by chemical dissolution.

(4) "Hair save" means the physical or mechanical removal of hair which has not been chemically dissolved, and either selling the hair as a by-product or disposing of it as a solid waste.

(5) "Hide" means any animal pelt or skin as received by a tannery as raw material to be processed.

(6) "Interference" means the discharge of sulfides in quantities which can result in human health hazards and risks to human life, and an inhibition or disruption of a POTW as defined in 40 CFR 403.3(i).

(7) "Monthly average" means the arithmetic average of 8 individual data points from effluent sampling and analysis during any calendar month.

(8) "New source," as defined for PSES and PSNS, means any building, structure, facility, or installation from which there is or may be a discharge of pollutants, the construction of which commenced after June 2, 1982.

(9) "New source," as defined for BPT, BAT, BCT, and NSPS, means any point source the construction of which commenced after January 6, 1983.

(10) "Raw material" means the hides received by the tannery except for facilities covered by the retan-wet finish-sides and retan-wet finish-splits subcategories where "raw material" means the hide or split in the condition in which it is first placed into a wet process.

(11) "Retan-wet finish" means the final processing steps performed on a tanned hide including, but not limited to, the following wet processes: retan, bleach, color, and fat liquor.

(12) "Sulfide" means total sulfide as measured by the potassium ferricyanide titration method described in s. NR 252.035 or the modified Monier- Williams method described in s. NR 252.036.

(13) "Vegetable tan" means the process of converting hides into leather using chemicals either derived from vegetable matter or synthesized to produce effects similar to those chemicals.

Wis. Admin. Code Department of Natural Resources NR 252.02

Cr. Register, October, 1986, No. 370, eff. 11-1-86; am. (12), Register, May, 2001, No. 545, eff 6-1-01.