View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORToutfall under Waste Discharge Requirements (WDRs) issued by the RWQCB. The plant hasa dry-weather average design capacity of 31.7 mgd. The projected outfall flows andpotential firm spare capacities, based on the permitted 31.7 mgd average design capacity,are summarized below. The 2001 flows are from the 2001 annual report of the Citysubmitted to the RWQCB. The 2020 wastewater flow rates are taken from the WastewaterCollection System Master Plan (Brown and Caldwell, 2000). The 2010 flow rate is theaverage between the 2001 and 2020 flows. These projections, which do not includecontingencies, indicate that the outfall will near capacity toward the end of the 2020planning horizon.Projected Outfall Flows and Potential CapacityParameter 2001 2010 2020Existing outfall capacity, mgd 31.7 31.7 31.7Wastewater flows, mgd 21.9 25.4 28.9Firm spare capacity, mgd 9.8 6.3 2.8The recycled water provided to growers for irrigation in the growing season and therecycled water recharged to groundwater by direct injection during the nongrowing seasonwould create additional capacity in the outfall. This could be used to increase the life of theoutfall and also to potentially accommodate other wastewater discharges.The water supply and other project elements of the GREAT Program are described inSection 4.0, GREAT Program Project Description.W112003002SCO LW1458.DOC/ 033390002 46