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According to the approved TIA, the existing level of service on impacted roadways would not be lowered by the traffic generated by development of 466,000 square feet of shopping center on the subject property. - Water A retail commercial use of 466,000 square feet on the subject property will have a water consumption rate of 141 Equivalent Residential units (ERU), or 35,250 gallons/day. This is based upon a level of service standard of 250 gallons/ERU/day. Water lines extend to the site from the South County Reverse Osmosis Plant which currently has a remaining capacity of approximately 1,866,000 gallons/day and therefore can accommodate the potable water demand associated with the proposed zoning district. - Wastewater The subject property is serviced by the Central Regional Wastewater Treatment Plant. Based upon the most intense use allowed under the proposed amendment, development of the property will have a wastewater generation rate of approximately 141 Equivalent Residential Units (ERU), or 35,250 gallons/day. This is based upon the level of service standard of 250 gallons/ERU/day. The Central Regional. Wastewater Treatment Plant currently has a remaining capacity of approximately 364,000 gallons/day and can accommodate the additional wastewater generated by the proposed zoning district. - Solid Waste Solid waste service includes pick-up by private operators and disposal at the county landfill. For a 466,000 square foot commercial development on the subject site, solid waste generation will be approximately 2,351 waste generation units (WGU) annually. A WGU is a Waste Generation Unit measurement equivalent to one ton (2,000 pounds) of solid waste. Using the accepted conversion rate of one cubic yard for every 1,200 pounds of compacted solid waste generated, the 466,000 square feet of commercial development would be expected to generate 3,918 cubic yards of wastelyear. A review of the solid waste capacity for the active segment of the county landfill indicates the availability of more than 840,000 cubic yards. The active segment of the landfill has a 1 year capacity, and the landfill has expansion capacity beyond 2010. Based on staff analysis, it was determined that the county landfill can accommodate the additional solid waste generated by the proposed zoning district. - Drainage All developments are reviewed for compliance with county stormwater regulations which require on-site retention, preservation of floodplain storage and minimum finished floor elevations. In addition, development proposals must meet the discharge requirements of the county Stormwater Management Ordinance. Any development on the subject property will be prohibited from discharging any runoff in excess of the pre -development rate. In this case, the minimum floor elevation level of service standard applies, since the property lies within a floodplain. Consistent with Drainage Policy 1.2, "all new buildings shall have the lowest habitable floor elevation no lower than the elevation of the 100 -year flood elevation as shown on the Federal Emergency Management Agency's Flood Insurance Rate Map, or as defined in a more detailed study report." Additionally, section 930.07(2) of the county's LDRs requires that all development shall have the Iowest floor (including basement) elevated to six inches or more above the base flood level. Since the subject property lies within Flood Zone AE -7, which is a special flood hazard area located within the 100 -year floodplain, any development on this property must have a minimum finished floor elevation of no less than 7.5 feet above mean sea level. Besides the minimum elevation requirement, on-site retention and discharge standards also apply to this request. With the most intense use of this site, the maximum area of impervious surface under the proposed zoning classification will be approximately 32.6 acres. The estimated runoff volume, based on that amount of impervious surface and the 25 year/24 hour design stone, will be approximately 2,154,000 cubic feet. In order to maintain the county's adopted level of service, the applicant will be required to retain approximately 387,000 cubic feet of runoff on-site. With the soil characteristics of the subject property, it is estimated that the pre -development runoff rate is 337.61 cubic feet/second. Based upon staffs analysis, the drainage level of service standards will be met by limiting off-site discharge to its pre -development rate of 337.61 cubic feettsecond, requiring retention of 387,000 cubic feet of runoff for the most intense use of the property, and requiring that all finished floor elevations exceed 7.5 feet above mean sea level. As with all development, a more detailed review will be conducted during the development approval process. APRIL 149 1998 -57-