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ORDINANCE 2012-036 <br />retention shall be provided on-site for the initial one (1) inch of rainfall plus <br />additional stormwater runoff generated by the development project over and <br />above that generated by the site prior to the proposed development unless there is <br />a legal positive outfall available that has sufficient capacity to accept the <br />additional runoff. All discharges from non-residential sites within one (1) mile of <br />the Indian River Lagoon shall be designed to retain the first one and one-half (1 <br />1/2) inches of rainfall on-site before discharge into a legal positive outfall, or the <br />Indian River Lagoon. <br />(d) Retention or detention facilities shall be constructed in such a manner as to <br />maximize utilization of available percolation capabilities on the site for recharge <br />enhancement and to minimize mosquito breeding by being shallow­,4ff4Pe and <br />easy to maintain_ Such facilities and shall have a skimmer mechanism if required <br />by the SJRWMD. Stormwater management facilities which are to be dedicated to <br />the county shall not penetrate the groundwater table. Private wet <br />retention/detention systems shall meet the following criteria: <br />The a"heatiea applicant shall provides a water quality certification from <br />the SJRWMD or Florida DEP that the direct connection to the <br />groundwater table, as proposed, will not significantly detract from the <br />quality of the groundwater. If the size of the development project is below <br />SJRWMD or DEP thresholds, this certification can May be waived; <br />2. The site is shall not be located on the primary sand ridge or in designated <br />shallow aquifer recharge areas as delineated on Figure 3.D.2 of the natural <br />groundwater aquifer recharge sub -element of the county's comprehensive <br />plan. <br />3. Littoral zones shall be provided in accordance with Chapter 934 of this <br />Code. <br />4 Where ponds <br />are greater than one acre in area at normal pool elevation., may use the <br />stormwater run-off contained in such penA(s) ponds may be used for <br />irrigation purposes. <br />5. As the SJRWMD requirements for treatment are equal to; or more <br />stringent than the county's, the issuance to the applicant of an appropriate <br />SJRWMD permit, exemption, or waiver for the subject development in <br />geestiee shall be sufficient and conclusive to show that all water quality <br />treatment standards contained in this code are satisfied. For issuance of a <br />Type A, B or C permit, the applicant must show adherence to other <br />sections of this code related to flood regulation, water rate and quantity <br />discharge regulation and other appropriate regulations contained herein. <br />Underline: Additions to Ordinance <br />Deleted Text from Existing Ordinance <br />17 <br />C:\Documents and Settings\tlister\Desktop\Revised IRC Flood Protect Ord final 10-26-12.rtf <br />