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SIP - YRCAA - Section 5.06 

SECTION 5.06 - GENERAL STANDARDS FOR MAXIMUM PERMISSIBLE 

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 will take precedent over a general emission 

standard listed in this chapter. When two or more emissions units are connected to a 

common stack and the operator elects not to provide the means or facilities to sample 

emissions from the individual emissions units, and the relative contributions of the 

individual emissions units to the common discharge are not readily distinguishable, 

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 any chapter of Title 173 WAC. Where current controls are determined to 

be less than RACT, ecology or the authority shall, on a case-by-case basis, define 

RACT for each source or source category and issue a regulatory order to the source or 

sources for installation of RACT.

A. Visible Emissions.

No person shall cause or permit visible plume from any source that exceeds twenty 

percent (20%) opacity for three minutes in any one hour period except:

1. When the emissions occur due to soot blowing/grate cleaning and the 

operator can demonstrate that the emissions will not exceed twenty percent 

(20%) opacity for more than fifteen minutes (15) in any eight (8) 

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 approximate times each day and the Authority be advised of the 

schedule.

2. When the owner or operator of the source supplies valid data to show that 

the opacity exceeds twenty percent (20%) as the result of the presence of 

condensed water droplets. The concentration of particulate matter as shown 

by a source test approved by the Authority must be less than one-tenth (0.1) 

grains per dry standard cubic foot. For combustion emissions the exhaust 

gas volume shall be corrected to seven percent (7%) oxygen.

3. As provided for in WAC 173-433-110 "Opacity Standards For Solid Fuel 

Region 10: the Pacific Northwest

Last updated on Saturday, March 12th, 2011.

URL: http://yosemite.epa.gov/r10/airpage.nsf/SIPs/YRCAA/SIPYRCAA506

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Burning Devices".

B. Preventing particulate matter from becoming airborne.

No person shall cause or permit the emission of particulate matter from any source 

which is transported or becomes deposited beyond the property under direct control of 

the owner or operator of the source in sufficient quantity to interfere unreasonably with 

the use and enjoyment of the property upon which the material was transported or 

deposited.

C. Material handling.

No person shall cause or permit material handling without taking reasonable 

precautions to prevent the release of contaminants to the ambient air.

D. Odor.

Any person who shall cause or allow the generation of any odor from any source 

which may unreasonably interfere with an adjoining property owner's use and 

enjoyment of his property must use recognized good practice and procedure to reduce 

these odors to a reasonable minimum.

E. Air contaminants or water vapor detrimental to persons or property.

No person shall cause or permit the emission of any air contaminant or water vapor 

from any source, including any air contaminant whose emission is not otherwise 

prohibited by this Regulation, if the air contaminant or water vapor causes detriment to 

the health, safety, or welfare of any person, or causes damage to property or business.

F. Sulfur dioxide.

1. No person shall cause or permit the emission of a gas containing sulfur 

dioxide in excess of 1,000 parts per million (ppm).

2. All concentrations of sulfur dioxide referred to above are by volume, dry 

standard conditions, and for combustion emissions the exhaust gas volume 

shall be corrected to seven percent (7%) oxygen and based on the average 

of any period of sixty consecutive minutes.

G. Concealment and masking. 

No person shall cause or permit the installation or use of any device, or the use of any 

means which, without resulting in a reduction in the total amount of air contaminant 

emitted, conceals an emission of an air contaminant which would otherwise violate any 

provisions of this chapter.

H. Fugitive dust sources.

1. The owner or operator of a source of fugitive dust shall take reasonable 

precautions to prevent fugitive dust from becoming airborne and shall 

maintain and operate the source to minimize emissions.

2. The owner(s) or operator(s) of any existing source(s) of fugitive dust that 

has been identified as a significant contributor to a Category I PM-10 area 

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shall be required to use reasonably available control technology to control 

emissions. Significance will be determined by the definition found in 40 

CFR Part 51, Appendix S, as amended July 1, 1990.

I. No person shall hereafter sell or install within the jurisdiction of the Yakima County 

Clean Air Authority any continuous, stationary air contaminant source in which the air 

contaminant emitted therefrom cannot be restricted to the standards as set forth in 

Sections 5.06(A) and 5.08. 

J. The density or opacity of an air contaminant shall be measured at the point of its 

emission, except when the point of emission cannot be readily observed it may be 

measured at an observable point on a plume nearest the point of emission.

State effective: 12/15/95; EPA effective: 3/4/98

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