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Fill must not be used as structural support. Compliance with these provisions must be certified by a Florida registered Professional Engineer. (c) Sand dunes or mangrove stands are not altered so as to increase potential flood damage. SECTION 8. REQUIRED INFORMATION FOR PERMIT APPLICATIONS A. Type A Permit - A detailed description and drawing (scale 1"=50' or larger) of the proposed stormwater management system shall be submitted to the Community Development Director by a Florida registered engineer or, for any development project constructed on a site of 1.00 acre or less, a Florida registered architect as long as any engineering service involved in the design is purely incidental to the architect's practice, as provided for in Florida Statutes §481.229 (1981), as may be amended from time to time. The following information shall be required: (1) Hydrologic data including design rainfall, project drainage area, tributory offsite drainage area, existing and proposed impervious area and soil characteristics including depth to seasonal high water table. Soil borings at four hundred (4001) feet spacing to a depth of six (61) feet shall be provided. Alternate representative soil profiles may be used if approved in writing by the Public Works Director and if demonstrated to be from a reliable and generally recognized source. A one foot interval contour topographic map of development area including offsite area of sufficient size to indicate the general neighboring elevations. (2) Hydrologic calculations for determining existing and proposed stormwater runoff. (3) Hydraulic data including receiving water stages, stage -storage and stage -discharge data for proposed retention and/or detention facilities, and percolation test data as per the following procedure: (a) The test holes shall be located as close as possible to the proposed location of exfiltration trench or other -19-