View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORTGroundwater is extracted as follows under these assumptions.Groundwater Recovery for Scenario 2cLocation Well PumpageCity Water Yard#20 (LAS)#21 (LAS)#22 (UAS)#23 (UAS)New 1 (UAS)New 2 (UAS)New 3 (UAS)500 AFY (310 gpm)500 AFY (310 gpm)3,873 AFY (2,401 gpm)3,873 AFY (2,401 gpm)3,873 AFY (2,401 gpm)3,873 AFY (2,401 gpm)3,873 AFY (2,401 gpm)O-H System(All UAS Wells)Additional pumping is apportioned to each of the El Riowells according to historic pumping in each of those wells.Scenario 2c2. Scenario 2c2 consists of the same elements as Scenario 2c, except for thefollowing:• Groundwater Recharge. No change.• Groundwater Recovery. The 25,458 AFY of water is recovered by extraction at wellslocated at Blending Station No. 3 (three UAS wells), in addition to the wells at the CityWater Yard (Nos. 20, 21, 22, and 23; plus three new UAS wells) and from wells at theUWCD El Rio wellfield. It is assumed that 40 percent of this water is recovered at theUWCD El Rio wellfield, 20 percent is recovered at the City Water Yard, and 40 percent isrecovered at Blending Station No. 3. Blending Station No. 3 is located at the intersectionof Rice Avenue and Gonzales Road, inland from the City Water Yard. The purpose ofthis scenario is to assess the reduction in coastal drawdown from shifting pumpage fromthe City Water Yard inland to Blending Station No. 3. The pumpage was apportioned asfollows for this scenario:−−At the City Water Yard, the two LAS wells are increased to a maximum of 500 AFYeach, while the remainder of the increase at the water yard is apportioned equallyamong the two existing UAS wells and the three new UAS wells.The additional pumping is apportioned to each of the UAS El Rio wellfield wellsaccording to historic pumping in each of those wells. These added extractions areapplied to the nine El Rio wells noted under the description for the Base Case.Groundwater is extracted as follows under these assumptions.W112003002SCO LW1458.DOC/ 033390002 79