Supplemental Initial Study and Mitigated Negative Declaration - City of Brentwood - Wastewater Treatment Plant Phase II Expansion Project

The City of Brentwood is advancing the Phase II Expansion of its Wastewater Treatment Plant to increase treatment capacity from 5 million gallons per day to 7.5 million gallons per day under average dry weather flow conditions. Originally planned in 2016 with a biosolids dryer building and storage facilities on a vacant parcel east of the plant, the project has been significantly modified. In 2023, the City revised its approach to incorporate a Biosolids Drying and Pyrolysis System (BDPS) using pyrolysis technology, with the final design relocating the entire system to within the boundaries of the existing WWTP site, eliminating the need for land acquisition or offsite construction. This change was documented through a Supplemental Initial Study and Mitigated Negative Declaration, adopted on November 14, 2023, which concludes the project will not result in significant environmental impacts when mitigation measures are implemented. The system will produce biochar and Class A biosolids, which may be used on public parks, medians, or sold offsite, reducing the frequency of biosolids hauling trips and associated emissions. No formal contract value, pricing, or financial terms are specified in the available documentation, as the materials are environmental compliance records under the California Environmental Quality Act and not a procurement solicitation or contract. The project’s place of performance is clearly defined as the WWTP at 2201 Elkins Way, Brentwood, CA 94513, with oversight managed by the City’s Director of Public Works. Environmental mitigation measures including controls for air quality, noise, water quality, and biological resources are outlined and tied to compliance with state guidelines and local regulatory frameworks, such as BAAQMD standards. There is no indication of contractor selection criteria, evaluation factors, or contractual obligations such as delivery schedules, inspection protocols, packaging standards, or representations from vendors. The document serves exclusively as an environmental review tool, with no formal clauses, certifications, payment details, or contract administration provisions included, and all procurement-related sections referenced under federal acquisition guidelines are absent.