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otherwise approved by the Miami -Dade Fire Department and based on the land use <br />served, minimum fire flow shall be maintained as follows, pursuant to Miami -Dade <br />County Code of Ordinances Section 2-103.21. - Required fire flow; consumption: <br />LAND USE MINIMUM FLOW/MINUTE <br />Single family residential/estate 500 <br />Single family & Duplex with minimum 7500 sq. ft. lots 750 <br />Multi -family residential 1,500 <br />Semi-professional offices 1,500 <br />Hospital & Schools 2,000 <br />Business 3,000 <br />D. Drainage. <br />(1) Drainage. The minimum acceptable level of service shall be protection from <br />flooding that would result from a one (1) day duration rain event from a ten (10) <br />year storm, with exceptions in previously developed canal basins as provided <br />below, where additional development to this base standard would pose a risk to <br />existing development. <br />(2) Lowest finished floor. All structures shall be constructed at, or above, the <br />minimum floor elevation specified in the federal Flood Insurance Rate Maps as <br />specified in Article III of Chapter 161, Flood Damage Prevention. <br />(3) The Water Quality Level of Service (WQLOS) component of the standard shall be <br />met when the annual average for each of the following twelve (12) priority NPDES <br />pollutants does not exceed the following target criteria for each of those <br />pollutants within a canal basin, or sub -basin, as determined in accordance with <br />procedures established by Miami -Dade County DERM. <br />POLLUTANT TARGET CRITERION (mg/I) <br />Biological oxygen demand (BOD) 9 <br />Chemical oxygen demand (COD) 65 <br />Total suspended solids (TSS) 40 <br />Total dissolved solids <br />Total ammonia -nitrogen <br />(IDS) 1,000 <br />& Organic ammonia 1.5 <br />Total nitrate <br />0.68 <br />Total phosphate (TP04) 0.33 <br />Dissolved phosphate <br />(DP04) Not available <br />Cadmium (Cd) <br />0.0023 <br />Copper (Cu) <br />0.0258 <br />Lead (Pb) <br />0.0102 <br />Zinc (Zn) 0.231 <br />(4) Applicants seeking development orders in canal basins or sub -basins that do not <br />meet the LOS standard in paragraphs (1) or (3), above, shall conform to best <br />management practices (BMPs) as provided bV Miami -Dade County Code. Owners <br />of commercial properties, where BMPs are required, shall demonstrate that their <br />on-site storm water system is inspected two times per year and maintained and <br />cleaned as required. Private residential developments in areas where BMPs are <br />required shall demonstrate that their on-site storm water systems are inspected <br />twice per year and maintained and cleaned as required. <br />152 <br />