DSPUD Wastewater Facilities Upgrade and Expansion

SYBLON REID was awarded a contract with Donner Summit Public Utility District to construct new process facilities and improvements to their existing wastewater treatment facility in Soda Springs, California.

The significant upgrades are necessary to meet the higher level treatment requirements associated with the revised discharge permit issued by the California Regional Water Quality Control Board. The primary changes to the plant include replacing chlorine gas disinfection with UV (ultraviolet) disinfection and tertiary treatment with membrane bioreactors (MBR), thereby eliminating the presence of chlorine by-products and resulting in a substantial positive effect on the environment.

New Process Facilities

The new facilities include: an equalization storage tank and pump station, headworks building with mechanical screens, chemical and electrical building, Vactor truck waste receiving station, sample pump vault, membrane equipment building with membrane tanks, permeate pumps, blowers, sludge pumps, chemical feed system, wastewater heating system, and UV disinfection system.

Improvements to Existing Facilities

The modifications to existing structures include: an equalization storage tank with added mixers and diffusers, equipment building removal, replacement of existing blowers, removal of standby power equipment, digester modification of aeration and decant system, advanced treatment building conversion to office and shop space, propane tank relocation, and expansion of the effluent irrigation land application system.

The scope of work also includes site excavation, grading, and paving, significant poured-in-place concrete structures, installation of structural steel for a new process building, electrical facilities and improvements, instrumentation and control systems, mechanical and yard piping, and all appurtenances and incidental work necessary for providing complete and operable facilities.

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