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## SIP - ECOLOGY - 400 - 040

173-400-040 GENERAL STANDARDS FOR MAXIMUM EMISSIONS.

All sources and emissions units are required to meet the emission standards of this chapter. Where an emission standard listed in another chapter is applicable to a specific emissions unit, such standard wi ll take precedent over a general emission standard listed in this chapter. When two or more emissi ons units are connected to a common stack and the operator elects not to provide the means or facilities to sample emissions from the individual em issions units, and the re lative contributions of the individual emissions units to the common dis charge are not rea dily distinguishable, then the emissions of the common stack must meet the most restric tive standard of any of the connected emissions units. Further, all emissions units are required to use reasonably available control technology (RACT) which may be determined for some sources or source categories to be more stringent than the applicable emission limitations of any chapter of Title 173 WAC. Where curren t controls are determined to be less than RACT, ecology or the authority sh all, as provided in section 8, chapter 252, Laws of 1993, define RACT for each s ource or source category and issue a rule or regulatory order requiring the installation of RACT.

(1) Visible emissions. No person shall cause or perm it the emission fo r more than three minutes, in any one hour, of an air contam inant from any emissions unit which at the emission point, or within a reasonable dista nce of the emission point, exceeds twenty percent opacity except:

(a) When the emissions occur due to s oot blowing/grate cleaning and the operator
can demonstrate that the emissions w ill not exceed twenty percent opacity for more than fifteen minutes in any eight consecutive hours. The intent of this provision is to permit the soot blowing and grate cleaning necessary to the operation of boiler facilities. This practice, except for testing and trouble shooting, is to be scheduled for the same approxima te times each day and ecology or the authority be advised of the schedule.

(b) When the owner or operator of a so urce supplies valid data to show that the presence of uncombined water is the only reason for the opacity to exceed twenty percent.

(c) When two or more sources are conne cted to a common st ack, ecology or the authority may allow or requir e the use of an alternate time period if it is more representative of normal operations.

(d) When an alternate opacity limit ha s been established per RCW 70.94.331 (2) 

### Region 10: the Pacific Northwest Last u p dated on Saturda y, March 12th

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...(c).

(2) Fallout. No person shall cause or permit the em ission of particulate matter from any source to be deposited beyond the property u nder direct control of the owner(s) or operator(s) of the source in sufficient qua ntity to interfere unreaso nably with the use and enjoyment of the property upon wh ich the material is deposited.

(3) Fugitive emissions. The owner or ope rator of any emissi ons unit engaging in materials handling, construc tion, demolition or any other operation which is a source of fugitive emission: (a) If located in an attainment area a nd not impacting any nonattainment area, shall take reasonable prec autions to prevent the rel ease of air contaminants from the operation.

(b) If the emissions unit has been identifie d as a significant contributor to the nonattainment status of a designated nona ttainment area, shall be required to use
reasonable and available control methods , which shall include any necessary changes in technology, process, or other control strategie s to control emissions of
the contaminants for which nonatt ainment has been designated.

(4) Odors. Any person who shall cause or allow the genera tion of any odor from any source which may unreasonably interfere wi th any other property owner's use and enjoyment of his property must use recogni zed good practice and procedures to reduce
these odors to a reasonable minimum.

(5) Emissions detrimental to persons or propert y. No person shall cause or permit the emission of any air contamina nt from any source if it is detrimental to the health, safety, or welfare of any person, or causes damage to property or business.

(6) Sulfur dioxide. No person shall cause or permit the emiss ion of a gas contain ing sulfur dioxide from any emissions unit in excess of one thousand ppm of sulfur dioxide on a dry basis, corrected to seven percent oxygen for combus tion sources, and based on the average of any period of sixty c onsecutive minutes, except:

When the owner or operator of an emissions unit supplie s emission data and can demonstrate to ecology or the authority that there is no feasible method of reducing the concentration to less than one thousand ppm (on a dry basis, correct ed to seven percent oxygen for combustion sources) and that the state and federal ambient air quality
standards for sulfur dioxide will not be exceeded. In such cases, ecology or the authority may require specific ambient air monitoring stations be established, operated, and maintained by the owner or operator at mutually appr oved locations. All sampling
results will be made availa ble upon request and a monthly summary will be submitted to ecology or the authority.

(7) Concealment and masking. No person shall cause or permit the installation or use of any means which conceals or masks an emission of an air contaminant which would Page 2 of 3 SIP - ECOLOGY - 400 - 040

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...otherwise violate any provi sions of this chapter.

(8) Fugitive dust sources. (a) The owner or operator of a source of fugitive dust shall take reasonable precautions to prevent fugitive dust from be coming airborne and shall maintain and operate the source to minimize emissions.

(b) The owner(s) or operator(s) of any exis ting source(s) of f ugitive dust that has been identified as a significant contributor to a PM-10 nonattai nment area shall be required to use reasonably availa ble control technology to control emissions. Significance will be determined by the criteria found in WAC 173-400-113(3).

State ado p ted: 9/20/93; EPA e ff

ective: 6/2/95 Page 3 of 3 SIP - ECOLOGY - 400 - 040

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