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M J MASTELLER & MOLER, INC. M 1 — CIVIL ENGINEERS EXHIBIT A 1655 27" St Ste. 2, Vero Beach, FL 32960 (772) 567-5300 Masteller & Moler, Inc. (MM) has researched both County and St. Johns River Water Management District (SJRWMD) files in an attempt to locate past designs and/or as-builts that might reveal the location of existing underground utilities within the Victor Hart Sr. Park site. Finding no reliable information, it is our recommendation that a ground penetrating radar firm be retained to assist to locate existing underground utilities in the area of the site where excavation is planned. This service will assist in design and will substantially reduce the potential for discovery of surprise conflicts during construction of the project improvements. MM has also determined the proposed addition of coquina and/or millings parking is considered by the SJRWMD to be impervious surfaces requiring stormwater treatment with supporting computations. We propose to provide the additional treatment for this project through expansion of the existing wet detention system at the north end of the site. Scope of Work: Task A — Ground Penetrating Radar (GPR) Services & Coordination: Masteller & Moler, Inc. will subcontract with Bloodhound to perform a ground penetrating radar (GPR) study of the Victor Hart Sr. Park site as described in their Proposal attached hereto as Exhibit B for the area depicted on Exhibit C. Following completion of the GPR field work we will notify the County Surveyor's office so the markings in, the field .may be located and added to the site's topographic survey. (The survey work is not included in our fee.) Task B — Stormwater Treatment System Plans / Report: We shall perform stormwater treatment computations to confirm the proposed expansion of the site's existing wet detention system that will support the additional impervious surfaces planned for this project. The computations shall be presented in a written format. The computations will also provide justification for adding a control elevation orifice in the existing outfall structure to allow for recovery of treatment volume. The treatment volume shall be defined as the originally required treatment volume required by SJRWMD ERP # 42-061-114983-1 plus the amount needed for compensating storage for the planned impervious surfaces for this project. Our services shall also include completing the design of the wet detention lake expansion construction plans to be integrated into the overall plans for this project. Following completion of the Plans & Computations, we shall prepare the appropriate application form for submittal to the St. Johns River Water Management District to allow for modification of the site's existing ERP. We shall address reasonable comments relative to our designs to allow the ERP to be issued. Page 1 of 2