Rule 1470 - Requirements for Stationary Diesel-Fueled Internal Combustion and Other Compression Ignition Engines

Rule 1470 (~194 kb*) was adopted by the South Coast AQMD Governing Board on April 2, 2004, and amended on March 4, 2005.  The rule implements the Airborne Toxics Control Measure (ATCM) for Stationary Compression Ignition Engines that was approved by the CARB in February 2004 (CARB ATCM).

Stationary compression ignition engines are engines:

  • That remain in one location for 12 months or longer and are typically categorized as either prime engines or emergency standby engines, and are used in a wide variety of applications; or

  • That remain at a location for less than 12 consecutive months if the engine is located at a seasonal source and operates during the full annual operating period of the seasonal source; or

  • That are moved from one location to another in an attempt to circumvent the 12 month residence time requirement.

Prime engines are stationary engines that are used for routine purposes in a wide variety of applications such as compressors, irrigation pumps, cranes, rock crushers, and agricultural irrigation.  Applications for emergency standby engines include providing emergency power for systems critical to human life (e.g., hospital and convalescent facility medical support systems).  These engines use diesel fuel and emit particulate matter (PM), oxides of nitrogen (NOx), volatile organic compounds (VOC), and carbon monoxide (CO).  Rule 1470 limits the particulate matter emissions from such engines as well as emissions of HC, NOx, NMHC + NOx, and CO.  For emissions of HC, NOx, NMHC + NOx, and CO, the engines (> 50 bhp) must meet the standards for off-road engines of the same model year and maximum rated power as specified in the Off-Road Compression-Ignition Engine Standards (title 13, CCR, section 2423).  If no standards have been established for an off-road engine of the same model year and maximum rated power, then the engine shall meet the Tier 1 standards in title 13, CCR, section 2423 for an off-road engine of the same maximum rated power, irrespective of the diesel-fueled CI engine’s model year.  In addition to the requirements from the CARB ATCM, Rule 1470 also establishes more stringent requirements for engines located on or within 100 meters from existing schools to reduce exposure to diesel PM for school children, who are more susceptible to diesel PM than healthy adults.  The rule applies to new and existing prime and emergency engines, and new agricultural engines.

The three main compliance avenues are diesel particulate matter filters, clean fuels, and limits on hours for testing and maintenance.  The provisions of Rule 1470 require that all owners/operators of stationary CI engines over 50 horsepower submit a Compliance Status Report and a Compliance Plan to the South Coast AQMD no later than July 1, 2005. 


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