For the Santa Nella County Water District / Denise Duffy & Associates

 The Santa Nella County Water District in west Merced County has a need to expand the District's wastewater treatment capacity, due to insufficient winter storage capacity at the existing facility, and to accommodate growth within the community over twenty years. As a subcontractor to Denise Duffy & Associates, Questa completed the Wastewater Treatment and Disposal section of an EIR for the proposed plant. The 0.16-mgd facility is planned to be located on a 54-acre property east of the Santa Nella community.

 The initial phase included construction of an off-site influent pump station, facultative pond, and oxidation pond treatment, wet weather storage, and disposal by pasture irrigation. The EIR discussed plant operations and treatment efficiencies, water quality issues, existing physical conditions, regulatory requirements, impacts, and mitigations. Impact analysis focused on surface and groundwater quality issues associated with effluent disposal.