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# SIP - SWCAA - Section 400-040

SWAPCA 400-040 GENERAL STAN DARDS FOR MAXIMUM EMISSIONS

All sources and emissions units are required to meet the emission standards of this section. Where an emission standard listed in another section is applicable to a specific emissions unit, such standard shall take precedent over a general emission standard listed in this

section. When two or more emissions unit s are connected to a common stack and the operator elects not to provide the means or faci lities to sample emissions from the individual emissions units, and the relative contribution s of the individual emissions units to the common discharge are not readily distinguishabl e, then the emissions of the common stack must meet the most restrictive 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 this regu lation or any chapter of Title 173 WAC. Where

current controls are determined to be less than RACT, the Authority shall, as provided in RCW 70.94.154, define RACT for each source or sour ce category and issue a rule or regulatory order requiring the installation of RACT.

(1) Visible emissions. No person shall cause or permit the emission for 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 distance of the emission point, exceeds twenty percent opacity as determined by certified observer in accordance with EPA Method 9 "Visual Determination of the Opacity of Emissions from Stationary Sour ces" as specified in 40 CFR 60 Appendix A except:

(a) When the emissions occur due to soot bl owing/grate cleaning and the operator can
demonstrate that the emissions will not exce ed twenty percent opacity for more than fifteen minutes in any eight cons ecutive 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 approximate times each day and the Author ity shall be advised of the schedule.

(b) When the owner or operator of a source 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 connected to a common stack, the Authority may allow or require the use of an alternate time period if it is more representative of normal operations. (d) When an alternate opacity limit has been established per RCW 70.94.331 (2)(c).

(2) Fallout. No person shall cause or permit the emission of particulate matter from any source to be deposited beyond the property un der direct control of the owner(s) or operator (s) of the source in sufficient quantity to in terfere unreasonably with the use and enjoyment of the property upon which the material is deposited. 

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

, 2011. URL: htt p : //y osemite.e p a. g ov / r10 / air p a g e.nsf / SIPs / SWCAA / SIPSWCAA400040 

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...(3) Fu g itive emissions. The owner or operator of any emissions unit en g a g in g in materials handling, construction, demolition or any other operation which is a source of emission: If located in an attainment area and not im pacting any nonattainment area, shall take reasonable precautions to prevent the releas e of air contaminants from the operation. (a) If the emissions unit has been identi fied 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 strategies to control emissions of the
contaminants for which nonatta inment has been designated.

(4) Odors. (a) Any person who shall cause or allow the ge neration of any odor from any source, which may unreasonably interfere with any other property owner's use and enjoyment of his property must use re cognized good practice and procedures to reduce these odors to a reasonable minimum. (b) A scentometer No. 1 odor strength or equivalent dilution in residential and commercial areas shall not be exceeded. (c) A scentometer No. 3 odor strength or equiva lent dilution in all other land use areas
shall not be exceeded.

Scentometer Readings Scentometer Concentration Range
No. No. of Thresholds
0 1 to 2
1 2 to 8
2 8 to 32
3 32 to 128
4 128 (d) A violation of this section shall have occurred when two measurements made
within a period of one (1) hour, separated by at least fifteen (15) minutes, off the property surrounding the air contamin ant source exceeds the sce ntometer limitations set
hereunder. (e) When the source is a manufa cturing process, no violation of this section shall have occurred provided that Best Availabl e Control Technology (BACT), Maximum Available Control Technology (MACT), or Lowest Achievable Emission Rate (LAER), as applicable for odor contro l and abatement, is provided and is operating in compliance with other applicable regulations and emission limits. (f) When the source is using "good agri cultural practices", as provided in RCW 70.94.640, no violation of this section shall have occurred.

(5) Emissions detrimental to persons or property. No person shall cause or permit the emission of any air contaminant 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 emission of a gas containing sulfur dioxide from any emissions unit in excess of one thousand pp m of sulfur dioxide on a dry basis, corrected to seven percen t oxygen or twelve percent CO 2 as required by the applicable emission standard for combustion sources, and based on the average of any period of sixty consecutive minutes except: (a) When the owner or operator of an emi ssions unit supplies emission data and can demonstrate to the Authority that there is no feasible method of reducing the concentration to less than one thousand ppm (on a dry basis, corrected to seven percent oxygen for sulfur dioxide will not be exceeded. In such cases, the Authority may require specific ambient air monitoring stations be established, operated, and maintained by the owner or operator at mutually approved locations. All sampling results shall be made available u p on re q uest and a monthl y summar y shall be 

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...submitted to the Authority.

(b) When a source limits such emission by a combination of constant emission controls and dispersion techniques approved by the Authority.

(7) Concealment and masking. No person shall cause or permit the installation or use of any means which conceals or masks an emi ssion of an air contaminant which would otherwise violate any provis ions of this section.

(8) Fugitive dust sources. (a) The owner or operator of a source of fugitive dust shall take reasonable precautions to prevent fugiti ve dust from becoming airb orne and shall maintain and operate the source to minimize emissions.

(b) The owner(s) or operator(s) of any existing source(s) of fugitive dust that has been identified as a significant contributor to a PM10 nonattainment area shall be required to use reasonably available control technology (RACT) to control emissions. Significance will be determined by the crit eria found in SWAPCA 400-113(3).

State effective: 9/21/95 ; EPA effective: 4/28/97 

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