Agricultural material composting operations are limited to 12,500 cubic yards of off-site-generated green material (including feedstock, compost, or chipped and ground material) being on-site at any one time if that operation sells or gives away more than 1,000 cubic yards of material per year and has provided Enforcement Agency notification. If an agricultural material composting operation exceeds the 12,500 cubic yard green material regulatory threshold, the operation would no longer qualify as an “agricultural material composting operation” and would be required to reduce the amount of green material on-site or obtain a Compostable Materials Handling Facility Permit with similar requirements of the solid waste facility permit. Some stakeholders indicated that they are unable to meet seasonal demand for their products because of these compostable material storage volume limitations.

Status of 2010-2011 Projects

CalRecycle staff is currently reviewing stakeholder comments in a draft white paper. Input regarding compostable material storage volume limitation issues can be sent to Martin Perez. An informal rulemaking may be initiated in 2010 to clarify the materials to be included in the calculation of the limit of 12,500 cubic yard regulatory threshold for all Agricultural Material Composting Operations and Green Material Composting Operations.

Approach and History: Regulatory Review

Research and White Paper

To better understand compostable material storage volume limitation issues, during fall 2009 staff interviewed stakeholders and reviewed literature. Staff completed a draft white paper on farm and ranch composting compostable material storage volume limitations in November 2009.

Stakeholder Workshops

Stakeholders were invited to provide input on the white paper at a Webinar workshop held in Sacramento on Dec. 9, 2009. The document was posted before the workshop for public review. The white paper was discussed and stakeholders provided comments at workshop in Sacramento on Feb. 8, 2010.