In the early to mid 1990s, Air Districts throughout the state were concerned about the emissions from portable equipment. Most District rules did not exempt portable equipment from permit, however the traditional permitting structure was difficult for industry to comply with (e.g. obtaining permits for specific locations prior to operation, obtaining permits and paying fees in multiple different districts).
As an alternative to traditional stationary source permitting, the California Air Pollution Control Officers Association (CAPCOA) developed a model portable equipment registration rule which any District could adopt to establish a registration program. The Yolo-Solano AQMD was one of the districts which adopted a local rule (Rule 3.3) on June 22, 1994 and adopted revisions on August 13, 1997. However, because the requirements in this rule are dated (don't correlate with the ATCM), the District is considering repealing this rule. For more information, contact
Paul Hensleigh at (530) 757-3665 or check our rule development page for any new developments.
Based on legislation that was authored in the mid-1990s, the California Air Resources Board (ARB) promulgated a statewide Portable Equipment Registration Program (PERP) on March 27, 1997. The regulation has been revised several times, including on June 22, 2006, December 7, 2006, March 22, 2007, and January 28, 2010. These latest amendments were approved by the Officer of Administrative Law and therefore became effective on February 19, 2011.
The PERP program is optional for businesses, but if a business obtains a valid PERP and operates in compliance with the requirements, state law prohibits the District from also requiring local permits. The District is the agency primarily responsible for enforcing the PERP.
If you are planning on purchasing portable equipment or considering bringing portable equipment into our District, we encourage operators to contact Jon Gildersleeve at (530) 757-3659.
Engines which are not certified to the latest EPA Tier (interim Tier IV for most size engines), can no longer get into the PERP program and therefore any operation in the Yolo-Solano District is in violation of our rules and regulations. The latest amendments to the PERP regulation and the ATCM gave some flexibility for Districts to permit or register Tier 1, 2 & 3 engines for a limited period of time. The Yolo-Solano AQMD has worked with neighboring air districts to develop a regional Tier 1/Tier 2 policy, which our board approved on September 8, 2010. The policy can allow for limited term usage of resident Tier 1/Tier 2 engines if a company enters a compliance agreement to settle the violation of not having a required permit. If a company comes to the District voluntarily, the penalty amount will be less than for any engine which we find operating in violation. For more information or to enter a compliance agreement, please contact Jon Gildersleeve at (530) 757-3659.