“Ringlemann Chart" means the chart published by the U.S. bureau of mines in which are illustrated graduated shades of grey to black for use in estimating the shade or density of smoke.
NR 400.02 Note
One unit on the Ringlemann Chart equals 20% opacity. The Ringlemann Chart is published as Figure 1 in “Fundamentals of Smoke Abatement," December 1950, bureau of mines Information Circular 7588, which is incorporated by reference in s. NR 484.06 (2)
“Road" means the entire width between boundary lines of any way open to the public for vehicular travel.
“Rolling 12 month average" means, with reference to only ledge rock quarries and industrial sand mines, a monthly average calculated each month by adding the total actual production of the preceding 12 calendar months, and dividing the total by 12. If a new quarry has been in existence for less than 12 calendar months, then the average shall be calculated by adding the total actual production since initial operation, and dividing the total by the number of calendar months subsequent to and including the month of initial operation.
“Screening operation" means a device for separating material according to size by passing undersize material through one or more mesh surfaces, screens or similar surfaces in series, and retaining oversize material on the mesh surfaces, screens or similar surfaces. Screening operation includes any grizzly, rotating screen or deck type screen. Screening operation does not include washers that are designed to remove unwanted or unnecessary material from the product.
“Secretary" means the secretary of the department of natural resources, state of Wisconsin.
“Semistationary source" means any facility, operation or equipment that has the capability of emitting any air contaminant while moving, but generally does not emit while moving.
NR 400.02 Note
Note: Examples are diesel cranes, air compressors and electric generators such as those used at construction sites.
“Shutdown" means the cessation of operation of a direct or portable source or of emission control equipment.
“Smoke" means all products of combustion of sufficient density to be observable, including but not limited to carbon, dust, fly ash, and other particles, but not including uncombined water.
“Solvent" means organic materials which are liquid at standard conditions and which are used as dissolvers, viscosity reducers, or cleaning agents.
“Stack" means any device or opening designed or used to emit air contaminants to the ambient air.
“Standard conditions" means a temperature of 20°
C (293 K, 68°
F) and a pressure of 760 millimeters of mercury (101.3 kPa, 29.92 in Hg).
“Standard industrial classification code" or “SIC code" means the series of codes which classify facilities according to the type of economic activity in which they are engaged, as described in the Standard Industrial Classification Manual, 1987, incorporated by reference in s. NR 484.05 (1)
“Standard pressure" means a pressure of 760 millimeters of mercury (29.92 inches of mercury).
“Standard temperature" means a temperature of 20°
“Startup" means the setting in operation of a facility or its emission control equipment for any purpose which produces emissions.
“Storage bin" means a facility for storage, including surge bins, for nonmetallic minerals prior to further processing or loading.
“Technological infeasibility" means incapable of being accomplished or carried out as a matter of practicality; i.e., technically impracticable rather than technically impossible.
“Temperature sensor" means a thermometer or thermocouple used to measure temperature.
“Thermal evaporation unit" means any device which uses temperatures greater than 140°
F to assist in evaporating organic compounds from soil or water.
“Threshold limit value" means the airborne concentration of substances, which represents exposure conditions under which it is believed that nearly all workers may be repeatedly exposed to day after day without adverse health effects.
“Total reduced sulfur" or “TRS" means the sum of any sulfur containing compounds in which the oxidation state of sulfur is less than zero.
NR 400.02 Note
Note: Common examples of such compounds are hydrogen sulfide, carbonyl sulfide, dimethyl sulfide, carbon disulfide, dimethyl disulfide and mercaptans.
“Transfer point" means a point in a conveying operation where a nonmetallic mineral is transferred to or from a belt conveyor except where the nonmetallic mineral is being transferred to a stockpile from a belt conveyor.
“Uncombined water" means water not chemically or physically bound to another materials.
“Volatile organic compound" or “VOC" means any organic compound which participates in atmospheric photochemical reactions. This includes any such organic compound other than the following compounds, which have been determined to have negligible photochemical reactivity:
2- (Difluoromethoxymethyl)- 1,1,1,2,3,3,3- heptafluoropropane ((CF3
3-Ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-(trifluoromethyl) hexane (HFE-7500).
Cyclic, branched or linear completely fluorinated tertiary amines with no unsaturations.
Sulfur containing perfluorocarbons with no unsaturations and with sulfur bonds only to carbon and fluorine.