O2Compost served as a compost sub-consultant to Parametrix, Inc. for the design, construction and start up of a compost facility located at the Walla Walla State Penetentiary (2003-2004). The project included facility sizing and conceptual layout, assistance with detailed design, bidding, and construction management. Following construction, O2Compost conducted on-site personnel training and follow-up process monitoring and troubleshooting services. The permit application for this project was the second to be prepared under the State's new solid waste handling regulations. The system was built to compost post-consumer food and green waste.