§ 88.502. Definitions.

 The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:

   Abatement plan—An individual technique or combination of techniques, the implementation of which will result in reduction of baseline pollution load. Abatement techniques may include, but are not limited to: Addition of alkaline material, special plans for managing toxic and acid forming material, regrading, revegetation and daylighting.

   Actual improvement—The reduction of the baseline pollution load resulting from the implementation of the approved abatement plan, except that a reduction of the baseline pollution load achieved by water treatment may not be considered as actual improvement.

   Baseline pollution load—The characterization of the pollutional material being discharged from or on the pollution abatement area, described in terms of mass discharge for each parameter, including seasonal variations and variations in response to precipitation events. The Department will establish in each authorization the specific parameters, including, at a minimum, iron and acid loadings, it deems relevant for the baseline pollution load.

   Best professional judgment—The highest quality technical opinion forming the basis for the terms and conditions of the treatment level required after consideration of reasonably available and pertinent data. The treatment levels shall be established by the Department in accordance with the requirements of sections 301 and 402 of the Federal Clean Water Act of 1977, act of December 27, 1977 (Pub. L. No. 95-217, 91 Stat. 1566—1609).

   Best technology—Measures and practices which will abate or ameliorate to the maximum extent possible pollutional discharges from or on the pollution abatement area. These measures include engineering, geochemical or applicable practices.

   Pollution abatement area—The part of the permit area which is causing or contributing to the baseline pollution load, which shall include adjacent and nearby areas that must be affected to bring about significant improvement of the baseline pollution load, and which may include the immediate location of the discharges.

   The provisions of this §  88.502 adopted June 28, 1985, 15 Pa.B. 2377, effective March 8, 1986, 16 Pa.B. 673.

   This section cited in 25 Pa. Code §  86.252 (relating to definitions).