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__.__>___ .,__ '____-'">:,.~_._h_.,.~.~_'._......_._.__, .'_ __ _,_~_____"_._ _~..._..'_'.~__..~ ____~.._. ...._ ___ SOUTHWEST FLORIDA WATER MANAGEMENT DISTRICT ENVIRONMENTAL RESOURCE STANDARD GENERAL CONSTRUCTION PERMIT NO. 44021279.000 I EXPIRATION DATE: December 21, 2005 I PERMIT ISSUE DATE: December 21,2000 This permit issued under the provisions of Chapter 373, Florida Statutes (F.S.), and Florida Administrative Code (FAC.), Rule 400-40, authorizes the Permittee to perform the work outlined herein and shown by the application, approved drawing(s), plans, and other documents, attached hereto and kept on file at the Southwest Florida Water Management District (District). All construction, operation and maintenance of the surface water managementsystern authorized by this permitshall occur in compliance with Florida Statutes and Administrative Code and the conditions of this permit. .. PROJECT NAME: GRANTED TO: Sun State Aluminum Sun State Aluminum, Inc. 37528 SR 54 West Zephyrhills, FL 33541 ABSTRACT: This permit authorizes construction of a new surface water management system serving a 2.27 acre commercial development known as Sun StateAluminum. The project is located off US 301, one- half mile south of SR 54 in Zephyrhifls.. in Pasco County: The project is located within a closed drainage basin. The stormwater management system is designed for a 100-year, 24-hour rainfall event of 12.0 inches, for volume retention. The project engineer used the SCS Type II Florida-modified rainfall distribution and a unit hydrograph shape factor of 256 to generate runoff hydrographs. Flow attenuation routings were initiated at the 36-hour drawdown elevation of the treatment volume for each pond. The required 1 OO-year retention volumes were also initialized at the same elevation. The proposed surface water management system will be comprised of one dry retention pond. Project 'runoff will be discharged to the adjacent low area as presently occurs. The drainage-calculations indicate the pond is sizedtoretain the 100-yearpost.;.minus, pre-developmentrunoffvolume. The pond will be equipped with a discharge structure sized to attenuate post-development peak discharges from the 25- year, 24-hour storm. Compliance with water quality requirements is assured, as the on-line- detention pond is sized to retain and infiltrate one-half inch of runoff from its contributingwatershed, in no longer than 72 hours. The discharge structure will be equipped with a skimmer to ensure that oils~ greases and' floating pollutants are not discharged into receiving waters. There are no wetlands withinttJe. project area. The Engineer of Record, William F. Carter, Florida P.E. No. 41852, has submitted design calculations and construction drawings which indicate no adverse off-site water quality or water quantity impacts are- anticipated to result from this development. The surface water management system. will be owned,. maintained and operated by the Permittee" Therequired legal documents are part of the file of record for this project. . , OP. & MAlNT. ENTITY~ PROPERTY LOCATION: SECITWP/RGE: Sun State Aluminum, Inc.. Pasco County 2, 3/26S/21 E TOTAL ACRES OWNED OR UNDER CONTROL: 2.27