View File - Development Services - City of Oxnard

TABLE 4-1Phase 1 and Phase 2 GREAT Program Elements Summary TableGREAT Program Element Phase 1 Phase 2Recycled Water – Tertiary Treatment Facility*Tertiary treatment of Oxnard WWTP waterConstruct 5-mgd-capacity TTFConstruct Secondary Effluent Pipeline – 500 feet of 36-inch pipelineExpand TTF to 32.6-mgd CapacityPurpose: Tertiary treatment of secondary effluent and potential landscape irrigation.Purpose: Tertiary treatment of secondary effluent and potential landscape irrigation.Recycled Water – Advanced Water Treatment Facility* Convert BWRDF to 3.8-mgd-capacity or Construct 3.8-mgd-capacity AWTFExpand AWTF to 15.3-mgd Capacity (with blending – 24-mgd Capacity)Advanced treatment of tertiary treated waterOption 1: Upgrade the existing BWRDF – convert and expand BWRDF to advanced water treatmentOption 2: Co-locate new AWTF with TTFConstruct Advanced Treatment Feed Water Pipeline (if Option 1 is implemented) – 500 feet of 30-inchpipelinePurpose: Agricultural irrigation, groundwater injection, and industrial users.Purpose: Agricultural irrigation and groundwater injection.Recycled Water Delivery SystemDeliver recycled water to agricultural usersEstablish Recycled Water Delivery System to 3.4-mgd CapacityConvert Existing Ocean View Pipeline from Potable to Nonpotable UseConstruct New Ocean View Potable Pipeline - 22,300 feet of 12-inch pipelineConstruct Tie-in to Former Ocean View Pipeline - 2,500 feet of 24-inch pipelineExpand Recycled Water Delivery System to 24-mgd CapacityConstruct Phase 2 Recycled Water Delivery System - 25,000 feet of 30-inch pipe, parallel to OceanView PipelineConstruct Tie-in to PVCWD Irrigation System –Option 1: Sturgis Road Tie-in – 4,000 feet of 24-inch pipelineOption 2: Laguna Road Tie-in – 3,100 feet of 24-inch pipelineOption 3: Hueneme Road Tie-in – 2,700 feet of 24-inch pipelineAquifer Storage and Recovery (ASR)Groundwater injection, storage, and extractionRegional Desalter*Brackish/groundwater desalination for potable useBlending Station No. 5Blend higher quality surface water with groundwater forpotable useConstruct Tie-in to PTP Irrigation System –Option 1: Channel Islands Blvd. Tie-in – 10,400 feet of 16-inch pipelineOption 2: Etting Road Tie-in – 9,200 feet of 16-inch pipelineOption 3: Nauman Road Tie-in – 5,400 feet of 16-inch pipelinePurpose: Distribute recycled water for irrigation to agricultural users served by the PTP in Pleasant Valleyarea.Implement ASR (620-gpm Total Capacity)Construct Pilot ASR Injection Well – one 620-gpm-capacity well in the Lower Aquifer System (LAS)Construct Pilot ASR Conveyance Pipeline – 2,700 feet of 24-inch pipelineBlending Option 1: Use Existing O-H Pipeline – potable water delivery through existing infrastructureBlending Option 2: Construct Turnout from Mugu Lateral – 1,800 feet of 10-inch pipelineConstruct New and Retrofit Existing Inland ASR Wells for Potable Water ASR – 7 to 8 potable ASRwells at the City Water Yard (251 Hayes Avenue)Purpose: Pilot ASR will assess the technical feasibility of using potable and recycled water for ASR,intended to help alleviate groundwater overdraft conditions and associated water qualityproblems, including coastal seawater intrusion in the Oxnard Plain and Pleasant Valley area.Inland Potable ASR will allow seasonal storage of potable water supplies to maximize use ofthe existing potable water distribution system, negating the need for construction of additionalpipelines for additional distribution capacity.Construct 5-mgd Regional DesalterPurpose: Treat pumped groundwater obtained through unused City groundwater pumping allocation andgroundwater storage credits for potable water production.Construct 15-mgd Blending Station No. 5Construct Connection to O-H Pipeline – 100 feet of 18-inch pipelineConstruct Connection to Industrial Lateral – 100 feet of 18-inch pipelineConstruct Blended Water Pipeline Connection – 2,200 feet of 20-inch pipelinePurpose: Provide improved water supply infrastructure reliability, water quality, and hydraulic efficienciesand to assist in meeting peak-hour and fire-flow water supply demands.N/APurpose: Expand recycled water distribution area to agricultural users served by PVCWD in the PleasantValley area.Expand Recycled Water ASR to 11.5-mgd CapacityConstruct Coastal Recycled Water ASR/Seawater Intrusion Barrier –Construct Coastal ASR Conveyance PipelineConstruct Coastal ASR Well LateralsInland Recycled Water ASR – use various new or existing inland ASR wellsPurpose:Control seawater intrusion in the Oxnard Plain and Pleasant Valley area.Assist with overall water balance of the Oxnard Plain and Pleasant Valley area.Expand Regional Desalter to 10 mgdPurpose: Expand capacity of Regional Desalter for treatment of pumped groundwater for production ofadditional potable water supplies.N/AConcentrate Collection SystemConstruct Concentrate Collection System - 57,000 feet of gravity pipeline (6- to 54-inch)Brine collection from regional brine dischargersPurpose: Avoid discharge of high salinity concentrate into City sanitary sewer system and Oxnard WWTP.Permeate Delivery SystemN/AConstruct Permeate Delivery System - 21,100 feet of pressure pipeline (6- to 12-inch)Permeate delivery from Regional Desalter to industrialPurpose: Convey permeate from Regional Desalter. This will negate the need for individual industrialusersfacilities to operate their individual advanced water treatment systems for treatment of City watersupply.Concentrate Disposal Discharge concentrate to ocean outfall Discharge concentrate to ocean outfallNote: * Generates concentrate requiring disposalW112003002SCO /DRD743.DOC/ 033500011