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The model will be calibrated using information obtained from the field <br />investigations and the metering of the Corby Street storm sewer. LFA <br />does not intend to model the existing combined sewers or future storm <br />sewers. <br />Assumptions: <br />Information pertaining to the flow from the University retention <br />basin to the Corby Street storm sewer will be provided by the <br />University upon request from the City. This shall include an <br />outflow hydrograph and method of operation. <br />• The separated storm sewer system will be sized for the 10-year, <br />Time of Concentration storm event. <br />• City will provide GIS information for existing sewers and <br />redevelopment plans for the study area. <br />• Commercial development will be required to store the 10-year, 6- <br />hour storm event volume. <br />5. EVALUATION OF ALTERNATIVES AND LETTER REPORT <br />LFA will evaluate alternatives for separating the existing combined <br />sewers and providing the capacity to convey the necessary storm events. <br />A preliminary drawing will be provided showing the trunk line sizing of the <br />most feasible alternative along with a preliminary cost estimate. <br />LFA will prepare a letter report summarizing the study findings and the <br />proposed recommended alternative. The report will include an analysis of <br />the current available capacity of the Corby Street storm sewer and <br />recommendations regarding future sewer infrastructure improvements <br />(trunk sewer sizing) for sewer separation in the study area. The Draft <br />Report will be provided to the City for review and comment. Following <br />receipt of the City's comments, the report will be finalized and five (5) <br />copies of the Final Report will be submitted to the City along with a PDF. <br />Appendix 2, Scope of Work <br />EJCDC E-520 Short Form of Agreement Between Owner and Engineer for Professional Services. <br />Copyright 02009 National Society of Professional Engineers for EJCDC. All rights reserved. <br />Page 2 <br />