BEI was retained by a Easy Bay Municipal Utility District (EBMUD) to trouble shoot an existing pump station to supply water for the fire system at the Alameda Naval Air Station in the City of Alameda. The project scope included determining how the pump station operates, preparing an Operation and Maintenance manual for the station, performing necessary repairs to make the pump station operable, perform regular pump tests, perform daily inspections of pump station, and providing on-call maintenance of the pump station. BEI personnel inspected the electrical and control systems to determine how the system was designed to operate. Necessary repairs were identified and completed to bring the pump station into compliance with current Health regulations. The system was started up and tested. Finally an O&M manual was prepared to provide detailed instructions on operations and maintenance procedures and a standard operating procedure developed for regular tests of the system.
City of Pleasanton, California
BEI was retained by a private developer to design a 1.4 million gallon steel tank and improvements to an existing pump station to supply water for the upper pressure zone of the Ruby Hill development in the City of Pleasanton. The project included preparation of plans and specifications for the tank, site improvements, addition of three 50 HP pumps to an existing pump station and related electrical and control systems. Control of the pumps is provided by a radio telemetry system that is linked to a central control system at the City of Pleasanton Utility Center. A detailed hydraulic analysis that included the water supply system to the pump station as well as the piping between the pump station and storage tank was carried out to confirm pump selection and assure the City that the system would perform efficiently under all expected operating conditions.
Private Estate, San Benito County, California
In order to provide high quality water for potable and irrigation use in an area with highly mineralized groundwater, BEI planned and designed a reverse osmosis water treatment system. Brine disposal is by percolation to an aquifer that is not connected to the one supplying the water to the system. The project included preparation of plans and specifications for the reverse osmosis treatment system, piping, valves and controls. Following construction, BEI was retained to operate and maintain the system.
City of San Juan Bautista, San Benito County, California
Under contract to the City, BEI provides complete operation and maintenance services for the City’s wells and reservoir and assists in the maintenance of the distribution system. The water supply is from two wells. BEI is responsible for the disinfection of the water supply, certifying the backflow prevention valves, monitoring and reporting of the water quality to the Department of Public Health and preparation of the Annual Small Water Systems Report and Consumer Confidence Report.
Stonegate Subdivision, San Benito County, California
Under contract to San Benito County, BEI provides complete operation and maintenance services for the Stonegate water treatment and distribution system. The system provides complete treatment to surface water from the San Felipe Water Project. The water supply is from a turnout on the raw water distribution system operated by the San Benito County Water District. The subdivision has a dual water distribution system, with both raw water and treated water delivered to each lot for landscape irrigation and drinking water respectively. BEI operates the surface water treatment system, which is virtually the same system as at La Honda and Memorial Park, to maintain compliance with bacteriological standards and both lead and copper and TTHM requirements. BEI also administers the cross connection control program between the raw water and treated water distribution systems and is responsible for reporting of the water quality to the Department of Public Health and preparation of the Annual Small Water Systems Report and Consumer Confidence Report. Several years ago BEI also used to do the water meter readings and billing for the 70 water customers.
Ventana Inn, Big Sur, California
Bracewell Engineering, Inc. designed improvements to 5 existing lift stations to convert them from septic effluent pump stations to solids handling pump stations and designed a new solids handling dual stage pump station with a discharge head of 280 ft. These pump stations then discharged to a new advanced treatment plant also designed by BEI consisting of screening, flow equalization, and a pre-engineered membrane bioreactor (MBR) capable of treating wastewater to less than 5 parts per million of suspended solids. In addition, the MBR system incorporated anoxic treatment for removal of ammonia nitrogen to less than one part per million. The system provides the highest quality treated wastewater available, exceeding all regulatory requirements. This new treatment plant also includes treated effluent storage, an effluent pump station to discharge to a drip irrigation system, and an emergency generator for back-up power.
Prunetree Shopping Center, Monterey County, California
BEI is responsible for the contract operation and maintenance of the Prunetree Shopping Center wastewater treatment system and collection system including one lift station. This shopping center in Prunedale, CA has a single basin SBR (Sequencing Batch Reactor), no septic tanks are needed. Wastewater is pumped from the shopping center to the SBR and the treated effluent is then pumped to one of the two leachfields. The solid sludge byproduct from the SBR treatment process is bagged onsite and transported to a landfill as needed. The treatment plant also has to be operated for nitrogen removal. The effluent quality from the sequencing batch reactor is critical to continued performance of the leachfield disposal system. BEI operates this 20,000 gpd system under contract to the shopping center ownership and is responsible for all monitoring reports to the Regional Water Quality Control Board and preparation and updating of O&M manuals and ESRP. The plant has met all discharge requirements on a consistent basis.
Rancho Larios Estate, San Benito County, California
BEI is responsible for the contract operation and maintenance of the Rancho Larios wastewater treatment system and collection system including four lift stations. This subdivision, near San Juan Bautista, CA has a sequencing batch reactor followed by reclamation and disposal to both a public playfield and an irrigation disposal field. The treatment plant also has to be operated for nitrogen removal. The solid sludge byproduct from the SBR treatment process is bagged onsite and transported to a landfill as needed. The effluent quality from the sequencing batch reactor is critical to continued performance of the reclamation and irrigation systems. BEI operates this 40,000 gpd system under contract to Homeowners Association and is responsible for all monitoring reports to the Regional Water Quality Control Board and preparation and updating of O&M manuals, SSMP, and ESRP. The plant has met all discharge requirements on a consistent basis.
Developer in SA Joaquin County, California
BEI provided sanitary engineering services to a developer in San Joaquin County to design a wastewater treatment plant for the Oakwood Lakes housing development. The design flows were an average dry weather flow of 160,000 gallons per day (gpd) and a peak flow of 200,000 gpd. The treatment plant components consisted of a drum screen, sequencing patch reactor (SBR), hypochlorite disinfection, and land disposal. The design incorporated conversion an existing pond system into a pond SBR, a sludge storage pond, and a flow equalization pond. The treated effluent was pumped to an infiltration system consisting of disposal ponds and subsurface drip irrigation.
San Benito County, California
BEI provided sanitary engineering services to San Benito County to upgrade a treatment plant to meet Title 22 for reclamation of domestic wastewater for irrigation of a soccer field. The design flows were an average dry weather flow of 42,000 gallons per day (gpd) and a peak flow of 60,000 gpd. The treatment plant modifications consisted of a wasting system to reduce the effluent turbidity from the sequencing batch reactors to Title 22 levels, modifications to the filters to meet Title 22 requirements for turbidity and automatic operation, and installation of metering and controls to meet Title 22 requirements for alarms and automatic shut down. The treated effluent is used to irrigate a soccer field in the Rancho Larios subdivision.