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6 . Stormwater Conveyance System Revisions — ENGINEER will prepare and/or revise the plan/profile sheets and Stormwater Management Plan sheets to incorporate changes in the drainage conveyance system resulting from as-built and/or proposed conditions of the joint-use stormwater management systems located at The Unity Church, Carolina Trace, Grace Baptist Church and the Mathis site (44`h Avenue) . Details for required modifications to existing control structures at The Unity Church and Carolina Trace will be provided. In addition, plans will be revised to accommodate the installation of "Vortex" stormwater treatment systems on the discharge to IRFWCD Sublateral B- 1 Canal at the south side of 16`h Street and on the FDOT discharge to the IRFWCD Main Canal at the south side of the Main Canal (provided "Vortex" systems are necessary to meet the required water quality treatment credits for the project and "Vortex" systems are approved by SJRWMD for this purpose) . 7 . Stormwater Management System Evaluation — ENGINEER will update the stormwater management calculations to assess the requirements for mitigation of stormwater quality treatment. The use of "Vortex" systems (as stipulated in "F" above) will be evaluated. The FDOT S .R. 60 drainage system will be evaluated for retrofit with a "Vortex" system. The stormwater management calculations report will be revised accordingly. A pre- application meeting will be conducted with SJRWMD to determine their conditions of approval for use of a "Vortex" system and their requirements for obtaining a permit. ENGINEER will provide recommendations to the COUNTY regarding the use of "Vortex" systems based upon the revised calculations and SJRWMD ' s requirements . Engineering evaluation and/or, incorporation into the design, of other stormwater quality and/or quantity options not specifically described herein shall be considered an additional service . 8 . Cross-Sections — ENGINEER will revise cross-sections, which are provided every 100 feet of the project length to reflect proposed revised design conditions . Cut and fill calculations will be revised based on the new typical sections . 9 . Signing and Marking — ENGINEER will revise signing and marking plans to reflect proposed changes in the roadway layout and lane alignment. 10 . Signalization — The COUNTY shall provide "redlined" marked-up set of plans to the ENGINEER to update the mast arm signalization design at the 43 `d Avenue/S . R. 60 intersection. The COUNTY shall be responsible for obtaining easements or right-of-way 6