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4 <br /> 2. Added scope:During design,additional structures,features,components and equipment were <br /> added to the design. <br /> 3. Redesign:A building relocation between the 50%and 90% submittals based on one set of <br /> limiting site conditions was determined incompatible with other site conditions.The building <br /> location has been restored to it 50% design location. In addition,roadway alignments were <br /> corrected to allow enough coverage over an existing shallow force main. <br /> 4. Evaluation of alternatives:The following were evaluated as potential facility options. <br /> a. Sizing of and cost estimating for a possible piping utilidor in the paved area along the <br /> operations building. <br /> b. Cost comparisons for pipeline options for the supply to Portal 5 including analysis of <br /> the effects of low concentrations of sodium hypochlorite on existing pipe cement <br /> systems. <br /> c. CAD design and layout of the Klorigen onsite hypochlorite generation system within <br /> the 90% design building footprint. <br /> These categories are highlighted within each of the tasks described below.The budget for each of these tasks <br /> is included at the end of this Exhibit. <br /> Task 501. Prepare Existing Base Mapping <br /> Following the response to and incorporation of the 90%design comments the City prepared a new survey of <br /> the hypochlorite building site.This task includes incorporating the new survey and topographic information <br /> into the current project base maps.Task 501 was budgeted as part of the 10% fee basis. <br /> Task 502. Geotechnical Investigations. <br /> During early design,it was determined that the existing soils reports were not adequate to evaluate the <br /> geotechnical conditions.Thus a new soil boring was collected and a new soils report created.Task 502 was <br /> budgeted as part of the 10% fee basis. <br /> Task 511. Civil Design <br /> Additional budget is added to this task to cover the additional design already completed through the response <br /> to the 90%comments as described in Progress Report 10 plus budget to complete the design from that <br /> point.The following are the additional tasks,both completed and yet to be completed. <br /> • (2)Sanitary sewer piping. <br /> • (2)Additional hypochlorite and chemical yard piping. <br /> • (2)Advanced water line design within concurrent project. <br /> • (2) Detailing of pipe routing in existing valve vaults and splitter boxes including site investigations <br /> and photography. <br /> • (2,4) Cost estimating,option development and design of a replacement pipeline to Portal 5. Design <br /> progressed to 90%but will not be constructed.Design information will be provided to City. <br /> • (3)Relocation of hypochlorite building and restoration to the original design location based on other <br /> ongoing construction activities at the EWFP. <br /> Page 2 <br /> C:\Documents and Settings\pcornish\Local Settings\Temporary Internet Files\OLKF\Amendment 1- <br /> revi.doc <br /> 10 <br />