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(e) Run tests for at least thirty (30) minutes and record at least the date, weather, project name, name of person conducting test, test number, location on site, sketch of hole and casing, groundwater conditions, incremental drop and time, and subsurface soil information. Information shall be tabulated and attested to by a register- ed professional engineer, licensed to practice in the State of Florida. The County Division of Public Works must be notified at least twenty-four (24) hours in advance of the tests being conducted and reserves the right to witness the test procedure. Exfiltration rates for designing the site drainage facilities shall be determined by the developer's engineer from these tests based on percolation rate experi- enced at the elevation of the proposed system using a safety factor of 2 or greater. Alternate percolation or permeabil- ity tests procedures may be used if approved in writing by the Division of Public Works prior to their use. (4) Hydraulic calculations for size channels, culverts, inlets, retention/detention ponds, pond discharge structures, and determining discharge rates and maximum water surface elevations. (5) Erosion and Sedimentation Control Plans, during and after construction. (6) Statement of all assumptions and reference sources used in conduct of the study. (7) A certificate from a professional engineer licensed in the State of Florida that the soils are suitable and proper for the uses and purposes of the proposed devel- opment in a wet season condition, or submission of a plan calling for the removal and replacement of unsatisfactory soils. If the applicant submits a plan for removal and replacement of soils, the applicant shall submit a certifi- cate from a professional engineer after the removal and replacement of soils has been completed, stating the new soils are suitable and proper for the uses and purposes of the proposed development. Such certificate shall be fur- nished to the Public Works Director prior to the issuance of a certificate of completion. (8) Where percolation is proposed, at least one boring per basin shall be submitted. Said borings shall be to a depth of twenty (20') below the invert of the basin or to a depth sufficient to locate the groundwater table or impervious soil layer. (9) A general description of the manner in which the stormwater management system is to be maintained, indicating who or what entity shall be responsible and by what method the responsibility shall be created and docu- mented.