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I~ =- BkF mgd. We recommend that the operating and inspection records of the 16" force main he evaluated to verify the condition of the pipes. If it is still in good condition, we recommend keeping the 16" FM in service and installing a new 18" line and installing an inter-tie hetween the existing] 6" line and the new 18" line to reduce the operating head. We will also verify the pumping head and adequacy of the new 18" line if the existing 16" force main has to he replaced. . Wc understand that the existing 200 KW emergency generator may not meet the air quality of today's standard; thereforc a new generator size will be detcrmined and included for thc future pump station. 3.2. Develop a preliminary layout to an acceptable scale and preliminary cost estimate for each alternative that the consultant believes to be feasible for the site. Each alternative layout should assure that the new pump station could be constructed adjacent to the existing station while the existing station is maintained in full operational service. Feasible uninterrupted bypass pumping plans for cutover between the existing and new pump station alternatives shall be considered in the alternative analysis ~ BKF will develop a preliminary layout in a City-provided format and cost estimate for each feasible alternative. We will achievc the following tasks: · We will devclop a conceptual layout and cost cstimate for each alternative. I~ · The layouts will include an enclosurc which will house the MCC, eontrol panel, YFD. SCADE system, air compressor for odor removal, ultrasonic level sensing device, emergency engine gencrator, small office, bath room and maybe an emergency shower cleaning facility, recorder for flow meter, lighting, air vcnt and storage area, and any other necessary or require equipments. ....1 ,l' , I: · The alternatives will have the new pump station being located in thc vicinity of the existing pump station with minimum interruption to the operation of the existing pump station. Every effort will be made to layout the pump station inside the existing boundary and will keep any land acquisition, if necessary, to a minimal. . Cut over of existing wet well 24" and 33" inlet lines to the new pump station will bc carefully coordinated to reduce the construction cost and interruption to the cxisting system. 3.3. Develop a benefit and drawback list for each alternative. The benefit, drawback and cost estimate evaluation should include construction costs, operation and maintenance costs, building maintenance, electrical power costs/considerations and equipment replacement ease and costs, capacity, reliability, feasibility, service life, etc. BKF will develop a benefit and drawback list and provide a cost estimate for each alternative. BKF will work closely with City staff and operation personnel to obtain more existing pump operation maintenance records in order to prepare more accurate operation and maintenance costs, building maintenance, electrical power costs/considerations, and equipmcllI replact'mcnts ease and cost, capacity, rcliahility, feasibility, the forcc main system, and service life etc. 3.4. Prepare comprehensive, draft alternative analysis/pre-design report that includes all of analysis, layout, benefit, drawback, cost and other pre-design considerations mentioned above. 5