R307. Environmental Quality, Air Quality.

R307-201. Emission Standards: General Emission Sta ndards. R307-201-1. Purpose.

R307-201 establishes emission standards for all ar eas of the state except for sources listed in section IX, Part H of the state implementation plan or located in a PM10 nonattainm ent or maintenance

area.

R307-201-2. Applicability. R307-201 applies statewide to any sources of emiss ions except for sources listed in section IX, Part H of the sta te implementation plan or located in a PM10 nonattainment or maintena nce area.

R307-201-3. Visible Emissions Standards. (1) Visible emissions from installations construc ted on or before April 25, 1971, except diesel engines, shall be of a shade or density no darker than 40% opacity, except as ot herwise provided

in these rules. (2) Visible emissions from installations construc ted after April 25, 1971, except diesel engines shall be of a shade or density no darker than 20% opacity, except as otherwise provid ed in these rules. (3) Visible emissions for all incinerators, no ma tter when constructed, shall be of shade or density no darker than 20% opacity. (4) No owner or operator of a gasoline powered en gine or vehicle shall allow, cause or permit visible emissions. (5) Emissions from diesel engines, except locomot ives, manufactured after January 1, 1973, shall be of a s hade or density no darker than 20% opacity, except for starting mot ion no farther than 100 yards or for stationary operation not exce eding three minutes in any hour. (6) Emissions from diesel engines manufactured be fore January 1, 1973, shall be of a shade or density no darker t han 40% opacity, except for starting motion no farther than 100 yard s or for stationary operation not exceeding three minutes in any hour. (7) Visible emissions exceeding the opacity stand ards for short time periods as the result of initial warm-up, soot blowing, cleaning of grates, building of boiler fires, cooling, etc., caused by start-up or shutdown of a facility, installation or operatio n, or unavoidable combustion irregularities which do not exceed three minutes in length (unavoidable combustion irregularities which exceed three minutes in length must be handled in accordance with R307-1 07), shall not be deemed in violation provided that the executive secretary finds that adequate control technology has been applied. The owner or operator shall minimize visible and non-visible emi ssions during start-up or shutdown of a facility, installation, o r operation through the use of adequate control technology and proper p rocedures. (8) Compliance Method. Emissions shall be brough t into compliance with these requirements by reduction of the total weight of contaminants discharged per unit of time rather than by dilution

of emissions with clean air. (9) Opacity Observation. Opacity observations of emissions from stationary sources shall be conducted in accor dance with EPA Method 9. Opacity observers of mobile sources and intermittent sourcesshall use procedures similar to Method 9, but the r equirement for

observations to be made at 15 second intervals over a 6-minute period shall not apply.

R307-201-4. Automobile Emission Control Devices. Any person owning or operating any motor vehicle o r motor vehicle engine registered or principally operated in the St ate of Utah on which is installed or incorporated a system or devi ce for the control of crankcase emissions or exhaust emissions in comp liance with the Federal motor vehicle rules, shall maintain the sys tem or device in operable condition and shall use it at all times th at the motor vehicle or motor vehicle engine is operated. No person sha ll remove or make inoperable the system or device or any part thereof , except for the purpose of installing another system or device, or part thereof, which is equally or more effective in reducing emissions from the vehicle to the atmosphere.

KEY: air pollution, PM10

Date of Enactment or Last Substantive Amendment: S eptember 2, 2005 Notice of Continuation: March 4, 2010 Authorizing, and Implemented or Interpreted Law: 1 9-2-101; 19-2-104