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2 . Bench scale and pilot plant scale testing to determine membrane performance will not be <br /> performed during this authorization. CDM will utilize full scale operating plant data in <br /> conjunction with reasonably conservative design criteria in the final design of the Phase <br /> II improvements . <br /> 3 . The existing facilities must remain in service during construction of the herein described <br /> Phase II improvements. Construction will be phased to incorporate two new skids in the <br /> existing process bay first, then bring the remaining new skid on-line upon completion of <br /> the new process bay . <br /> The primary intent of this effort is to provide Contract Documents suitable for obtaining <br /> construction bids (one contract) for the North County Water Treatment Plant - Phase II <br /> Expansion improvements (within the fence) . Well and raw water piping offsite or outside the <br /> fence to be designed and bid by others . In general the new or modified facilities include the <br /> following items : <br /> Raw Water Supply System <br /> ■ Add three new 2 . 14 mgd upper Floridian aquifer production wells (including meters, <br /> telemetry, well pumps, etc . ) . (TO BE DONE BY OTHERS) <br /> ■ Add new raw water system supply piping from the new wells to the existing system or <br /> process building. Piping outside fence or offsite to be done by others . <br /> ■ Replace existing raw water main piping entering process building. <br /> Pretreatment System <br /> ■ Add three new 1 ,300 gpm booster pumps with VFD / MCC . <br /> ■ Add three new 2 mgd (each) vertical cartridge filter housings (2 in existing, 2 in new <br /> process bay) . <br /> ■ Add new external self-cleaning automatic sand strainer sized for the entire process flow <br /> (plant build out) . <br /> Membrane Process and Administration Building <br /> ■ Expand existing Membrane Process and Administration Building to provide space for <br /> up to eight total skids and associated electrical/ control/ administrative area. Interior <br /> and exterior architecture will match that of the existing facilities . <br /> ■ Add two new 1 . 5 mgd (each) capacity membrane skids in existing Membrane Building <br /> with local instruments and controls . <br /> ■ Replace the membranes in the existing two skids . <br /> ■ Add one new 1 .5 mgd capacity (each) membrane skid in new membrane processing <br /> building with local instruments and controls . <br /> ■ Add a new static mixer sized for plant build-out. <br /> ■ Add new process piping sized for plant build-out. <br /> ■ Expand the central computer control system sized for plant build-out. <br /> ■ Add new raw, product, and concentrate water instrument panels for plant build-out. <br /> ■ Add new transformer/ switchgear sized for plant build-out. <br /> ■ Add new or upgrade existing emergency power generator . <br /> ■ Add concentrate treatment system for plant build-out. <br /> ■ Expand existing membrane cleaning system. <br /> B-2 mh1534. doc <br />