MODOC COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 4.11 - ORCHARD AND CITRUS HEATERS
(Amended January 15, 1989)
No new orchard or citrus heater shall be sold for use against frost damage unless it has been approved by the
Air Resources Board. No person shall use any orchard or citrus heater unless it has been approved by the Air Resources
Board, or does not produce more than one gram per minute of unconsumed solid carbonaceous material.