View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORTProjected Demands and Supplies for PHWAParameter 2000 2005 2010 2020PHWA Supplies, AFYUWCD Allocation a 4,342 4,011 3,880 3,880PHWA Allocation b 1,637 1,529 1,313 1,313BWRDF losses c (950) (950) (950) (950)CMWD Tier 1 Allocation d 2,641 2,641 2,641 2,641Total PHWA Supplies 7,670 7,231 6,884 6,884PHWA Demands, AFY e 6,071 6,277 6,483 6,894Supply Excess (Deficit), AFY f 1,599 954 401 (10)Notes:a Includes baseline transfers of 421 AFY.b Includes MWD transfers of 700 AFY.c Brine losses estimated at 19 percent of BWRDF usage (estimated at 4,900 AFY).d CMWD Tier 1 estimates based on the CMWD Purveyor Meeting handouts May 22, 2002.e Presented PHWA demands are interpolated between actual data for year 2000 and UWCD projections for year 2020.f Does not assume use of any accumulated groundwater conservation credits3.2.3 Permeate DemandSeveral users currently provided potable water service by the City independently provideadvanced water treatment to make it acceptable for their specific use (e.g., producehigh-quality water for their manufacturing/processing purposes). Such treatment caninclude RO treatment or ion exchange. Concentrates from this treatment are discharged tothe City sanitary sewer. Some examples of these facilities include Procter & Gamble(manufacturing), Agrilink (food processing), and Pacific Linen Services (laundry service).Fiscal Year 1999/2000 water demands for these industrial dischargers are summarizedbelow.Potential Desalted Water DemandsWater DemandConcentrate ProductionFacility hcf AFY gpd AFYAgrilink Foods 62,988 145 180,000 144Arcturus Manufacturing 12,354 28 25,000 20Kaiser Aluminum 4,674 11 10,000 8Mission Linen Supply 15,484 36 39,000 31Pacific Linen Service 42,333 97 80,000 64Procter and Gamble 1,014,976 2,330 1,200,000 1,340Sithe Energies a 80,214 – 160, 428 184 - 368 70,000 56Willamette Industries 267,229 613 235,000 187Subtotal 1,500,252 -1,580,466 3,444 – 3,628 1,839,000 1,850Note:a According to Sithe Energies personnel (Dave Hermanson, personal communication), Sithe Energies currently has anarrangement with Boskovich Farms for its raw water supply. Exact demand data were not available, but it wasestimated that between and 5 and 10 million gallons of water were used per month. Sithe Energies uses a two-stageRO system to produce its water. RO concentrate is used by Boskovich Farms in the first stage of their two-stageproduce washing process. The concentrate is then discharged to the City sanitary sewer system via Boskovich’s sewerconnection. Boskovich Farms was not identified as a discharger of industrial concentrate (City of Oxnard, 2002).W112003002SCO LW1458.DOC/ 033390002 42