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AACE EXHIBIT A - ULEAPSTM SCOPE OF WORK ANDERSEN ANDRE CONSULTING ENGINEERS, INC. AACE Proposal No. P19-1256 Geotechnical Engineering February 19, 2019 Construction Materials Testing Environmental Consulting Indian River County BOCC Public Works - Stormwater Division 1801 27th Street Vero Beach, FL 32960 Attention: Mr. Keith McCully, P.E. PROPOSAL FOR GEOTECHNICAL ENGINEERING EVALUATION PROPOSED UNIVERSAL LOW ENERGY AQUATIC PLANT SYSTEM (ULEAPSTM) NORTH RELIEF CANAL - 66TH AVENUE AND 53`3 STREET INDIAN RIVER COUNTY, FLORIDA As requested, Andersen Andre Consulting Engineers, Inc. (AACE) is pleased to present this proposal for preparing a subsurface exploration and geotechnical engineering evaluation for the above referenced project. The purpose of the exploration is to obtain general subsurface soil information so that geotechnical engineering recommendations can be provided for site preparation procedures, basin/berm construction, excavations, water control/conveyance structure installations, anticipated seepage losses, slope stability, and other geotechnical aspects of the project. PROTECT UNDERSTANDING The subject approximately 18 -acre former citrus grove property is located on the northeast corner of 66th Avenue and 53rd Street in Indian River County, Florida. It is bordered to the west by the Indian River Farms Water Control District (IRFWCD) Lateral A Canal and to the north by the IRFWCD North Relief Canal (NRC). Based on our conversations and our review of the forwarded project -related information, we understand that Indian River County (IRC) is proposing to construct an aquatic plant system (named ULEAPSTM) on this property, intended to reduce pollutants in the adjacent NRC. Based on our conversations and our review of the provided rendering of the proposed ULEAPSTM (30 percent design), we understand that the system will include the following features: • A pump station near the northwest corner of the site which will convey water from the NRC into the ULEAPS through piping and structures along the west side of the site. • Two approximately 3.5 -acre Lettuce Scrubber Basins with perimeter berms. These basins will have concrete bottom slabs (EL 20.5 ft) and 15 -ft wide HDPE -lined perimeter berms top EL 23.5 ft) and a design water EL of 22.5 ft. • Four concrete Algal Reaeration Units with associated Concrete Sludge Storage and Compositing areas, weirs, sluices and structure/pipe connections. • Water will flow from these features into two Final Settling Basins (bottom EL 10 ft) which, in turn, connects to a Wetland Polishing Marsh (bottom EL ranges from 12 ft to 14 ft), after which the water is released back into the NRC through a structure and piping. Misc. perimeter concrete structures, box culverts, piping, etc. will also be constructed as part of connecting the various ULEAPS features. We understand that no deep structures, such as sheet pile weirs, pile supported structures, etc. are currently planned for the project. 834 SW Swan Avenue, Port St. Lucie, Florida 34983 Ph: 772-807-9191 Fx: 772-807-9192 www.aaceinc.com