The Los Angeles Wastewater Integrated Network Systems (LAWINS) project is a significant capital improvement program initiated by the City of Los Angeles. It will integrate the city’s entire wastewater control system, conveyance system, and all four treatment plants.
The DRC team is supporting the 15-year, $88.6 million Honeywell Control System Replacement Program, critical portion of LAWINS. The program is overhauling or replacing the existing control system with Honeywell’s state-of-the-art Distributed Control System (DCS). DRC is supplying instrumentation and control systems engineering and CAD services to Honeywell International, the system supplier. Work is underway on-site at the Terminal Island wastewater treatment plant in San Pedro and the Hyperion plant in El Segundo.
Our team’s tasks include field validation, process and instrumentation drawings, and process engineering. The team also is developing an Input/Output (I/O) list, instrumentation database, and piping and instrumentation drawings. DRC engineers are developing control narratives based on reverse engineering extracted from existing PLC codes. This facilitates DCS’s programming.
Replacing the control system will allow Los Angeles to link its four wastewater treatment plants with pumping stations located across the city. The wastewater treatment system controls 6,700 miles of sewer lines serving more than four million residential and commercial customers in Los Angeles and 29 surrounding cities.
DRC supported the completion of the energy-related components of the Hyperion Solids Handling Capital Improvements Program. Such services included, but were not limited to:
DRC personnel interfaced and coordinated with federal, state, and local governmental representatives and industrial and professional groups as directed by the Program Director. DRC provided on-site air emission sampling, conforming to standard SCAQMD- and EPA-approved methods, of the FBG flue gas and the GTG exhaust gases at the facility. DRC performed SCAQMD and EPA-approved laboratory analyses for specific compounds.
Hyperion Wastewater Treatment Facility Full Secondary and Digester Expansion Project, City of Los Angeles, Department of Public Works
The Hyperion Plant currently treats most of the wastewater generated in the City of Los Angeles and in several cities and unincorporated areas in the Los Angeles metropolitan area. This major renovation and expansion program culminates two decades of effort on the local, state, and federal levels to upgrade the aging Hyperion Plant.
The Hyperion Plant occupies a 144-acre site adjacent to Santa Monica Bay, near Los Angeles International Airport. The original plant was completed in 1949 and expanded in 1956 with an average flow of 400 million gallons per day (mgd). All wastewater receives primary treatment, and 100 mgd receive secondary treatment.
DRC assisted the city with the permitting process and with evaluating alternatives to fulfill the plant’s required treatment capacity. This project is designed to provide a comprehensive renovation of the entire facility, along with expanding the site’s secondary treatment capacity. The net effect will be reductions in the discharge of pollutants to Santa Monica Bay, despite a large increase in the amount of wastewater treated.
D R Consultants & Designers, Inc. (DRC) is involved in the engineering, construction management, and start up & commissioning of various facilities and pipelines at the Hyperion Wastewater Treatment Plant. The Solids Technology Resource Recovery Project (S.T.R.R.) through the City of Los Angeles, Bureau of Sanitation includes public works and industrial use structures for recovering energy from the solids and gas captured in the waste treatment process. DRC’s services have been used at various facilities, including a steam drying facility, two centrifuge facilities, gas flare control buildings, an electrical distribution/switching facility, and numerous liquid and gas pipelines.
This project consists of bio-solids combustion projects, off-site solids management, alternatives fuels program, bio-solids drying projects, air emissions management, and improving design capabilities. DRC’s engineering personnel assisted with designing ancillary pipelines for these facilities. These designs included carbon steel sludge lines, ductile iron and carbon steel water lines, stainless steel steam lines, and PVC chemical lines. Our construction management personnel oversaw the construction, scheduling, and cost estimating of various facilities and pipelines, remediated contaminated soil, and replaced double-walled gasoline storage tanks. DRC personnel have analyzed the contractor’s Site Safety Health and Emergency response plan, assisted with inspecting construction work, and supervised potholing operations to locate chemical, waste, and pressurized gas lines.
DRC also is providing on-site air emissions sampling of the FBG flue gas and the GTG exhaust gases at Hyperion. All samplings conform to standard SCAQMD- and EPA-approved methods. DRC is performing SCAQMD- and EPA-approved laboratory analyses for the specified compounds and calculating, as appropriate, the concentration and emission rates for the specified compounds by source. DRC is producing all written reports, summarizing and detailing the air emission procedures.
The City of Los Angeles provides wastewater collection and treatment for residents, businesses, and industries located within the city and for 27 contract agencies. The Terminal Island System serves the city’s southern portion. This subsystem has one treatment plant, the Terminal Island Treatment Plant, located in the Los Angeles Harbor area.
This aeration tank project was developed to improve unit process control and to enhance the plant operators’ ability to control the treatment process and comply with effluent discharge requirements. It also involved designing and installing sluice gates in the walls separating each tank, replacing the diffusers/piping in the mixed liquid channel and the diffusers/piping in influent channel, replacing foam spray nozzles, insulating air headers, and installing flow meters.
DRC participated in the comprehensive evaluation, preliminary design, plan production, training and start-up of various aeration tanks, which included relocating underground utilities and designing, upgrading, and installing new and existing equipment.
DRC also provided preliminary design, structural engineering, and support services to improve the plant’s secondary treatment capacity. This included installing submersible pumps at the aeration basins, a monorail system to move the pumps between different basins, step feed modifications, 24-inch and 16-inch pipelines, replacing access platforms, pipe supports, equipment supports, and structural modifications to the existing concrete structures.
Terminal Island Wastewater Treatment Facility, Secondary Process Flow Equalization Project, City of Los Angeles, Bureau of Sanitation
DRC provided structural engineering and construction support services for the secondary process flow equalization project to improve the Terminal Island plant’s secondary treatment capacity.
The project included installation of submersible pumps at the aeration basins, a monorail system to move the pumps between different basins, step feed modifications, 24-inch and 16-inch pipelines, replacement of access platforms, pipe supports, equipment supports, and structural modifications to the existing concrete structures.
During the preliminary design of the project various alternatives were investigated for the monorail system design to move the pumps between different basins. Corrosion, due to the adverse environment at the basins was an important factor in the material selection. New stainless steel platforms were designed to replace existing corroded aluminum platforms. All pipe supports were designed using stainless steel. All structural supports for pumps, monorail system, piping, and electrical equipment were designed to resist seismic forces anticipated at the plant per UBC.