D.C. Mun. Regs. tit. 20, r. 20-1099

Current through Register Vol. 71, No. 44, November 1, 2024

Rule 20-1099 - DEFINITIONS

1099.1

When used in this chapter, the following terms shall have the meanings ascribed:

Continuous emissions monitoring system or CEMS - the equipment used to sample, analyze and measure air pollutants and provide a permanent record of emissions expressed in pounds per Million British Thermal Units (lb/MMBtu) and tons per day. The following component parts shall be included in a continuous monitoring system:

(a) NO_x pollutant concentration monitor;

(b) Diluent gas (oxygen or carbon dioxide) monitor;

(c) Data acquisition and handling system; and

(d) Flow monitor (where appropriate).

Control period - the period beginning May 1st of each year and ending on September 30th of the same year, inclusive.

Excess emissions - the NO_x emissions, in tons, that a NO_x source reports during a control period that is greater than the maximum allowable NO_x emissions limit in § 1001.1 of this chapter.

Fossil fuel-fired - the combustion of fossil fuel, alone or in combination with any other fuel, where fossil fuel:

(a) Actually combusted comprises more than fifty percent (50%) of the annual heat input on a British Thermal Unit (Btu) basis during any year; or

(b) Is projected to comprise more than fifty percent (50%) of the annual heat input on a Btu basis during any year, provided that the source shall be "fossil fuel-fired" as of the date, during such year, on which the source begins combusting fossil fuel.

Heat input - the product (expressed in MMBtu/time) of the gross calorific value of the fuel (expressed in Btu/lb) and the fuel feed rate into the combustion device (expressed in fuel mass/time) and does not include the heat derived from preheated combustion air, recirculated flue gases, or exhaust from other sources.

NO_x budget source - a source that includes one or more NO_x budget units.

NO_x budget unit - a NO_x unit that is subject to the NO_x budget emissions limitation under § 1001.1.

NO_x unit - fossil fuel-fired stationary boiler, combustion turbine, or combined cycle system that has a maximum design heat input of greater than two hundred fifty Million British Thermal Units (250 MMBtu) per hour.

Ton - any "short" ton (two thousand pounds (2,000 lb)). For the purpose of determining compliance with the NO_x budget under § 1001, total tons for a control period shall be calculated as the sum of all recorded hourly emissions (or the tonnage equivalent of the recorded hourly emissions rates) in accordance with this chapter, with any remaining fraction of a ton equal to or greater than five-tenths (0.5) ton being deemed to equal one (1) ton.

D.C. Mun. Regs. tit. 20, r. 20-1099

As amended by final rulemaking published at 47 DCR 8646(October 10, 2000); as amended by final rulemaking published at 47 DCR 9686 (December 8, 2000); Amended by Final Rulemaking published at 62 DCR 5685 (5/8/2015)