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QUEENS MIRROR LAKE AND TRIPLET CHAIN -OF -LAKES <br />HYDROLOGIC/ NUTRIENT BUDGET EVALUATION <br />EXHIBIT A: SCOPE OF SERVICES <br />Prepared By <br />Environmental Research & Design, Inc. <br />August 5, 2010 <br />As requested by the City of Casselberry (City), Environmental Research & Design, Inc. (ERD) has <br />prepared the following Scope of Services to develop nutrient/hydrologic budgets and water quality <br />recommendations for Queens Mirror Lake and the Triplet Chain -of -Lakes. Hydrologic and nutrient <br />budgets will be developed for Queens Mirror Lake, North Lake Triplet, Middle Lake Triplet, and <br />South Lake Triplet to identify significant pollution sources and to provide a ranking of areas with <br />respect to annual mass loadings and areal loadings. The hydrologic budget will include estimated <br />inputs from precipitation, groundwater seepage, and stormwater runoff. The nutrient budget will <br />include inputs from bulk precipitation, groundwater seepage, internal recycling, and stormwater <br />runoff. A 6 -month field monitoring program, concentrated primarily on Queens Mirror Lake and <br />South Lake Triplet, is proposed to collect data on groundwater seepage, sediment characteristics, <br />significant inflows, and water movement between the interconnected lakes. This program will <br />include both dry and wet season conditions and will be used to develop the hydrologic and nutrient <br />budgets. Water quality management recommendations will be developed to maintain and improve <br />water quality in the lakes. Specific work efforts to be performed to achieve these objectives are <br />outlined below. <br />Environmental Research & Design, Inc. (ERD) shall, at a minimum, perform the following specific <br />tasks for the Queens Mirror Lake and Triplet Chain -of -Lakes project: <br />I. Project kick-off meeting: Representatives of ERD will attend a project start-up meeting <br />with representatives of the City to review the overall project objectives, the scope of <br />services, and the project schedule. Copies of all previous water quality investigations and <br />data, engineering studies, bathymetry, stormsewer maps, and other information related to <br />the lakes and surrounding watershed areas, will be provided to ERD by the City. <br />2. Review available information: All data provided to ERD at the project start-up meeting <br />will be reviewed and summarized for potential use in developing hydrologic and nutrient <br />budgets for the lakes. All available water quality data for the four lakes will be entered into <br />a statistical database, and trend analyses will be performed to identify significant water <br />quality trends for typical trophic state indicators (total nitrogen, total phosphorus, <br />chlorophyll -a and Secchi disk depth). <br />3. Perform field reconnaissance: ERD will perform a detailed field reconnaissance of the <br />drainage basin and contributing stormsewer system for the four lakes. This reconnaissance <br />will be used to visually observe characteristics of the watershed areas and to verify locations <br />for the inflow monitoring efforts discussed under Task 4. Watershed areas treated by <br />existing stormwater management systems will be identified, and this information will be <br />used in estimation of hydrologic and nutrient inputs from stormwater runoff. <br />PROPS \QUEENS MIRRORnRIPLET CHAIN -OF -LAKES HYDROLOGIC -NUTRIENT BUDGET EVALUATION FEE -AUGUST 2010 PAGE I <br />