View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORTGroundwater is delivered from UWCD through a 27-inch turnout off the O-H pipeline withan estimated delivery capacity of approximately 10,700 gpm or 15.4 mgd. Surface waterfrom CMWD is delivered through a 30-inch branch of the Oxnard Conduit with anestimated delivery capacity of approximately 13,200 gpm or 19.0 mgd.Blending Station No. 2 (Richmond Blending Station)Blending Station No. 2 is located near the intersection of Richmond Avenue and WooleyRoad. It has a rated design capacity of 36 mgd and serves as the primary backup to BlendingStation No. 1. Blending Station No. 2 has two sources of water: (1) groundwater fromUWCD and (2) surface water from CMWD. Groundwater delivered from UWCD is througha 24-inch branch of the O-H pipeline with an estimated delivery capacity of approximately8,500 gpm or 12.2 mgd. Surface water from CMWD is delivered through a 30-inch branch ofthe Oxnard Conduit with an estimated delivery capacity of approximately 13,200 gpm or19.0 mgd. Two wells were located at the blending station, but are in the process of beingdestroyed and would not be available for future use.Blending Station No. 3 (Gonzales Blending Station)The existing Blending Station No. 3, at the corner of Gonzales Road and Rose Avenue,serves as one of the City’s largest water production facilities. Currently, treated water fromboth the UWCD and the CMWD is blended under pressure and delivered to the City’sdistribution system. Since the construction of Blending Station No. 3 in the mid-70s, ashopping center, parking lot, and gasoline station with car wash have been constructed inthe surrounding area.Three wells also exist at the Blending Station No. 3 site. They were drilled at this site so thewater they produce could be easily treated and blended at the blending station. Well 19 wasdrilled in 1985, Well 24 in 1994, and Well 25 in 1995. Wells 19 and 25 were intended toproduce water from the underlying aquifer, and Well 24 was drilled with the intention to bean aquifer storage and recovery well (ASR well). All three wells were intended to increasesource capacity for the City by utilizing local groundwater sources. However, these wellsare not equipped with pumping equipment and never have produced water for deliveryinto the City’s distribution system. Due to the recent discovery of MTBE and otherpetroleum hydrocarbons in the area surrounding the existing Blending Station No. 3, thesewells are no longer suitable for producing potable water. Therefore, in order for theaquifer’s groundwater to be treated and blended at Blending Station No. 3, the City hasbeen forced to relocate the existing wells and blending equipment to a more suitablelocation.Following the assessment of potential sites located along Gonzales Road between RoseAvenue and Rice Avenue, the City selected a site at the southeast corner of Solar Drive andWankel Way for the new Blending Station No. 3 facility. The new Blending Station No. 3facility is being constructed as part of a project separate from the GREAT Program. Theexisting Blending Station No. 3 facility within the shopping center at Rose and Gonzales willalso be demolished and the groundwater wells will be properly destroyed.The new Blending Station No. 3 wells will have a capacity of approximately 12 mgd.Pipeline extensions to CMWD and UWCD pipelines will also be constructed as part of theW112003002SCO LW1458.DOC/ 033390002 34