A. No person shall cause or permit the effluent from a single emission point, multiple emission point, or fugitive emissions source to have an average optical density equal to or greater than the opacity limiting standards specified in Table 17.16.040 at the end of this chapter, or as otherwise specified in this title, subject to the following provisions:
1. Opacities (optical densities), as measured in accordance with Method 9, of an effluent shall be measured by a certified visible emissions evaluator with his natural eyes, approximately following the procedures which were used during his certification, or by an approved and precisely calibrated in-stack monitoring instrument.
2. A violation of an opacity standard shall be determined by measuring and recording a set of consecutive, instantaneous opacities, and calculating the arithmetic average of the measurements within the set unless otherwise noted herein. The measurements shall be made at approximately fifteen-second intervals for a period of at least six minutes, and the number of required measurements shall be as specified in Table 17.16.040. Sets need not be consecutive in time, and in no case shall two sets overlap. If the average opacity of the set of instantaneous measurements exceeds the maximum allowed by any rule, this shall constitute a violation.
3. The use of air or other gaseous diluents solely for the purpose of achieving compliance with an opacity standard is prohibited.
B. When the presence of uncombined water is the only reason for failure of a source to otherwise meet the requirements of this article, this article shall not apply.
Instantaneous Opacity Measurements | Maximum Allowable Average Opacity, % | |||
Type of Source | Required No. (For a Set) | Excluded No. (Highest Values) | No. to Use For Averaging | |
Instantaneous Opacity Measurements | Maximum Allowable Average Opacity, % | |||
Type of Source | Required No. (For a Set) | Excluded No. (Highest Values) | No. to Use For Averaging | |
Asbestos-Containing Operation 1 | 25 | 0 | 25 | 0 |
Cold Diesel Engines 2 | 25 | 0 | 25 | 60 |
Loaded Diesel Engines 3 | 26 | 1 | 25 | 60 |
Incinerators | 27 | 2 | 25 | 20 |
Portland Cement Plants 4 | 25 | 0 | 25 | 20 |
Other Sources 5 | 25 | 0 | 25 | 20 |
1 An asbestos mill, manufacturing or fabrication operation which uses asbestos as a raw material, or spraying operation which sprays materials containing more than one percent asbestos by weight.
2 Applicable to the first ten consecutive minutes after starting up a diesel engine.
3 Applicable to a diesel engine being accelerated under load.
4 Applicable to kiln, clinker cooler, and other process equipment.
5 Any source not otherwise specifically covered within this table, unless otherwise specifically covered in this chapter.
(Ord. 2004-97 § 5 (part), 2004; Ord. 1993-128 § 4 (part), 1993)