Biosolids Digester Facilities Project/Operations, Engineering and Maintenance Buildings

Biosolids Digester Facilities Project/Operations, Engineering and Maintenance Buildings

On March 8, 2018, the San Francisco Planning Commission certified the Final Environmental Impact Report (FEIR) for the Biosolids Digester Facilities Project (Biosolids project or approved project) at the Southeast Water Pollution Control Plant (Southeast Plant), located in the southeast part of San Francisco. Originally built in 1952 with major upgrades in 1982 and 1996, the Southeast Plant is the City's largest wastewater treatment facility, treating approximately 80 percent of San Francisco's sewage and stormwater flows. The approved project includes the construction and operation of a new solids treatment process, odor control, energy recovery, and associated facilities to replace outdated existing facilities with more reliable, efficient, and modern technologies. Biosolids are the recyclable solid materials removed from the wastewater during the wastewater treatment process and digesters are the major facility used in the solids treatment process. The SFPUC proposes to modify the approved project to construct an Operations, Engineering, and Maintenance building; a Mechanical Maintenance building; and a new utility enclosure at the Southeast Plant (the operations, engineering, and maintenance buildings instead of the originally approved Maintenance Shops 1 and 2. These proposed buildings would be located southeast of the originally approved location for the Maintenance Shops 1 and 2 and adjacent to, but outside of, the approved project site. The proposed buildings would support operations and maintenance activities and replace the current function of building SEP 850, and of the existing temporary pre-fabricated trailers (referred to as buildings "SEP 850A" and "SEP 850B"). The SFPUC would not demolish building SEP 870, which was originally proposed for demolition, and instead would demolish building SEP 850, the SEP 850A and SEP 850B trailers, and the adjacent surface parking lot. Activities currently performed in the existing building SEP 850 and trailers would be temporarily relocated during construction. Temporary construction staging would occur along Jerrold Avenue and within the Southeast Plant. The proposed operations, engineering and maintenance buildings would support operations and maintenance activities at the Southeast Plant, including the maintenance of treatment equipment, same as described for Maintenance Shops 1 and 2 under the approved project. The buildings would provide equipment repair areas, parts storage, and staff facilities. As with the approved project, the modified project would not result in changes to the overall treatment capacity of the Southeast Plant.

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