The proposed project would receive and process organic materials, primarily greenwaste, foodwaste, and biosolids, but would also receive untreated scrap wood, natural fiber products, non-recyclable paper waste, and inert material, such as sediment, gypsum, wood ash, and clean construction debris. Non-hazardous liquid wastes may also be accepted as a substitute for the water that is added for efficient composting. The project would process organic material utilizing a covered windrow system that would be a combination of aerated static pile (ASP) with either positive or negative aeration, and covered windrow composting technology. Initially, the Project would realize a daily throughput of up to 500 tons per day (TPD), increasing up to a maximum of 1,000 TPD, producing compost-based soil amendments for agricultural, horticultural, erosion control and land reclamation uses. Alameda County is the approving agency for the Conditional Use Permit, which constitutes the project action or proposed project under CEQA.
The project could process up to 1,000 TPD of organic material utilizing a windrow system incorporating either negative air or positive air ASP technology. For the unimproved property, construction of the Project would necessitate grading, excavation and soil removal, deposition and compaction of fill material, reuse of excavated soil as fill, transporting and installing materials and equipment, disposal of soil and construction waste, and construction of retention ponds and project access roads. The active composting area would occupy approx. 15 acres, within which curing and screening zones would occupy approx. 8 acres and other operating areas (including access roads) would occupy approx. 7 acres. Active composting windrow piles would vary in height, up to a maximum of 12 feet. A drainage system incorporated into the windrow area would deliver storm runoff from the compost site to a stormwater detention pond. Construction would be completed in two phases: construction of the initial facility with a capacity of 500 TPD (Phase I) followed with expansion of the facility up to 1,000 TPD (Phase II). Figure 2 shows the overview of the proposed site plan.