California Department of Resources Recycling and Recovery (CalRecycle) 

Compostable Materials

Odor Impact Minimization Plan

The Odor Impact Minimization Plan (OIMP) regulatory requirements in 14 CCR 17863.4 have been developed to allow an operator to aggressively devise an operational plan to prevent odors from occurring and to plan in advance the mitigation measures that should be taken if odors do occur. The OIMP also contains the site’s complaint investigation procedures which should include a 24 hour phone hotline for receipt of odor complaints, notification to the EA and emergency procedures for the cease and desist of any operations that are causing odor impacts. If the operator is not following the procedures in the OIMP, the EA may issue a Notice and Order to require the operator to either comply with the odor impact minimization plan or to revise it. If the odor impact minimization plan is being followed, but the odor impacts are still occurring, the EA may issue a Notice and Order requiring the operator to take additional reasonable and feasible measures to minimize odors. An OIMP is required for all compostable materials handling operations and facilities, with the exception of agricultural operations without odor complaints.

Sample OIMP: A guidance document for the preparation of an OIMP.

Several examples of OIMPs with suggested integrated best management practices are presented below.

Last updated: October 30, 2008
Compostable Materials, http://www.calrecycle.ca.gov/SWFacilities/Compostables/
Martin Perez: Martin.Perez@calrecycle.ca.gov (916) 323-0834