Scope_of_Services.pdf

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SEMINOLE COUNTY CONTINUING

PROFESSIONAL LAKE MANAGEMENT SERVICES

SCOPE OF SERVICES

Introduction

This Scope of Services outlines potential work efforts to be performed by consultants for the

Seminole County Watershed Management Division (WMD) related to lake management and water quality services. Details of potential projects and services are outlined below.

Potential Work Efforts

1. Development of Hydrologic and Nutrient Budgets: As directed by WMD, consultants will perform all engineering, field, and laboratory services necessary to develop nutrient and hydrologic budgets for selected lakes. Evaluation of hydrologic inputs and losses may be performed for direct precipitation, stormwater runoff, shallow groundwater seepage, deep groundwater recharge, flow between interconnected lakes, evaporation, and any other potential inputs or losses which may affect the evaluated lake. These hydrologic inputs and losses may be evaluated directly using field measurements and studies or may be estimated based upon accepted modeling or other types of evaluation techniques. Evaluation of nutrient/pollutant budgets may include inputs and losses from bulk precipitation, groundwater seepage, deep groundwater, runoff inputs, internal recycling, flow between interconnected lakes, and any other significant nutrient/pollutant inputs or losses. The inputs and losses may be evaluated based upon field measurements or using professionally accepted evaluation techniques.

2. BMP Evaluations: Consultants may perform field or desktop evaluations of the performance efficiency of selected BMPs. These evaluations may include a review of the engineering details of the BMP to be evaluated; set-up and maintenance of stormwater collection and hydrologic monitoring equipment; installation and monitoring of shallow groundwater wells; collection and analysis of water, sediment, or soil samples; data evaluation; literature reviews; evaluation of new products, and other types of information necessary to assist in establishing the performance efficiency of the selected BMP.

3. Nutrient Analysis: Consultants may perform evaluations of nutrient loadings from identified sources, including collection of precipitation, groundwater, surface water, stormwater, baseflow, sediment, or soil samples, and associated laboratory analyses to achieve the study objectives.

4. Estimation of Loadings: Consultants may perform both field and desktop studies to estimate nutrient and pollutant loadings generated by identified land use types or areas. Field evaluations may be performed which would include set-up and monitoring of collection equipment, collection of hydrologic data, and laboratory analyses for selected parameters.

Desktop studies may also be performed to estimate loadings using professionally acceptable modeling and evaluation techniques.

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5. Land Use Analysis: Consultants may perform evaluations related to the analysis of various land use types and associated nutrient and pollutant loadings. These evaluations and analyses may be based upon field monitoring or desktop studies.

6. Expert Testimony: At the request of WMD, consultants will provide expert testimony related to any of the potential activities outlined in this Scope of Work.

7. Sampling: At the request of WMD, consultants will perform sampling services related to collection and analysis of surface water samples, stormwater samples, baseflow samples, groundwater seepage, sediment samples, soils, shallow groundwater, benthic macroinvertebrates, zooplankton, algae, aquatic macrophytes, bacteria, bulk precipitation, and other sampling activities as directed by WMD. These sampling activities may include installation and monitoring of field equipment and subsequent laboratory analyses for selected parameters.

8. Limnology/Limnological Investigations: As directed by WMD, consultants will perform limnological investigations to address specific issues related to aquatic ecosystems or for purposes of routine data collection. These investigations may include collection and analysis of water samples, sediments, soils, shallow groundwater, groundwater seepage, benthic macroinvertebrates, algae, bacteria, zooplankton, or other parameters as directed by WMD.

Work efforts performed will include field collection activities, set-up and maintenance of appropriate monitoring equipment, collection of in-situ data using submersible water quality monitors, Secchi disk measurements, measurement of photosynthetic active radiation (PAR), flow monitoring, development of water quality or predictive models, and any other measurements necessary to accomplish the goals of the study.

9. Wetland Restoration: Consultants will perform evaluations related to wetland restoration with respect to water quality improvements. These services may include evaluation and establishment of hydroperiods for wetlands, collection and analysis of field samples, evaluation of wetland hydrology, and nutrient dynamics within wetlands.

10. Designs of BMPs: Consultants may provide services related to the conceptual and final design for BMPs to achieve specified water quality goals. The BMPs will be selected based upon site conditions, nutrients/pollutants of concern, and anticipated performance efficiency.

Design phase services may also include bidding assistance and construction observation and management.

11. Mapping Services: As directed by WMD, consultants may perform mapping services related to establishment of vegetative communities within lakes, bathymetric maps, sediment or muck depth bathymetry, mapping and delineation of watersheds and sub-basins, identification and mapping of land use within watersheds, mapping of soil types, wetland areas, and other mapping services as directed by WMD.

12. Develop Water Quality Models: Consultants may develop lake water quality or predictive models to evaluate lake response to nutrient/pollutant inputs or evaluate water quality response to proposed BMPs.

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13. GIS Services: As directed by WMD, consultants may provide GIS services related to lake and watershed management projects. These services may include mapping and delineation of watersheds, delineation of municipal jurisdictions and associated cost-share contribution, characterization of soils, land use, vegetation types, topography, and other GIS services as directed by WMD.

14. Development of Management Plans/Master Plans: Consultants may develop lake and watershed management plans to achieve specific water quality goals. These management plans or master plans may address the existing nutrient/pollutant sources impacting water quality and provide recommendations for activities for both structural and non-structural activities to improve water quality characteristics.

15. Nutrient Abatement Services: Consultants may provide nutrient abatement services as requested by WMD which may include evaluation of sediment recycling, evaluation of groundwater seepage, determination of chemical requirements for sediment inactivation, application of liquid alum or other coagulants to achieve nutrient inactivation or abatement, and other services as directed by WMD.

16. Data Analysis: Consultants may perform data analysis on data sets generated by consultant or provided by WMD. These services will include establishment of an appropriate database, statistical evaluations of the data, trend analyses, analysis of variance, simple descriptive statistics, nonparametric statistics, generation of both tabular and graphical data formats, and generation of conclusions regarding the data.

17. Report Preparation: Consultants may provide both draft and final reports related to any activities performed during the Scope of Services.

18. Public Presentations: As directed by WMD, consultants may provide public presentations of the results of work efforts assigned by WMD. These public presentations may be to homeowners groups, stakeholders, governmental agencies, the Seminole County Board of

County Commissioners, or other forum designated by WMD.

19. Conduct Investigations for NPDES and TMDL Requirements: As directed by WMD, consultants may conduct field investigations, identify stormsewer and watershed delineations, perform data review, conduct pollutant loading calculations, develop water quality models, and other services necessary to support NPDES and TMDL requirements.

20. Lake Restoration Activities: As directed by WMD, consultants may conduct restoration activities including but not limited to dredging, aquatic plant harvesting etc. within a designated waterbody. These restoration activities may be conducted using a SCLM approved sub-contractor, with the consultant providing oversight.

21. Project Management Services: Consultant shall coordinate and schedule all activities on the behalf of WMD to provide various project management activities related to in-lake restorations. Project management includes but is not limited to obtaining necessary support documents and permits (dredge, herbicide, grass carp, ERPs, etc.) on the behalf of the

WMD, scheduling public meeting(s) to disseminate the WMD’s recommendations to the lakefront residents, coordination/scheduling with WMD vendors on all contracted lake restoration activities (mechanical, herbicidal, etc.), schedule and perform site

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inspection/supervision of contracted work. Close coordination shall include but not limit to the following: Seminole County MSBU Program, Seminole County Subdivision

Rehabilitation Program, lake resident associations, and Florida Department of

Environmental Protection Bureau of Aquatic Plant Management. Consultant may provide any additional services requested by the WMD that are related to the WMD and/or other

Seminole County divisions.