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• Wastewater Based upon the most intense use allowed under the proposed Comprehensive Plan amendment, development of the property will have a wastewater generation nate of approximately 246 Equivalent Residential Units (ERU), or 61,500 gallons/day. This is based upon a level of service of 250 gallons/ERU/day. County wastewater service is available to the site from the West Regional Wastewater Treatment Plant, which currently has a remaining capacity of over 1,000,000 gallons/day and can accommodate the additional wastewater generated by the subject request. Solid Waste Solid waste service includes pick-up by private operators and disposal at the county landfill. The county's adopted level of service standard for landfill capacity is 1.97 cubic yards/person/year. With the county's average of approximately 2.3 persons/unit, a residential development of 246 units would be anticipated to house approximately 566 people (2.3 X 246). For the subject request to meet the county's adopted level of service standard of 1.97 cubic yards/person/year, the landfill must have enough capacity to accommodate approximately 1,115 (566 X 1.97) cubic yards/year. A review of the solid waste capacity for the active segment of the county landfill indicates the availability of more than 800,000 cubic yards. The active segment of the landfill has a four year capacity, and the landfill has expansion capacity beyond 2010. Based on the analysis, staff determined that the county landfill can accommodate the additional solid waste generated by the site under the proposed land use designation. 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. Since the site is located within the M-1 Drainage Basin and the Indian River Farms Water Control District (IRFWCD), development on the property will be prohibited from discharging any runoff in excess of two inches in a twenty-four hour period, which is the approved IRFWCD discharge rate. In this case, the minimum floor elevation level -of -service standard applies, since a portion of the property lies within a floodplain. Consistent with Stormwater Management Sub -Element Policy 1.2, the finished floor elevation of any new buildings constructed within a floodplain must be elevated a minimum of six inches above the base flood level. Since the subject property lies within Flood Zone AE -23, which is a special flood hazard area located within the 100 -year floodplain, any development on the property must have a minimum finished floor elevation of no less than 23.5 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 land use designation will be approximately 21.6 acres. The maximum runoff volume, based on that amount of impervious surface and the 25 year/24 hour design storm, and given the IRFWCD two inch discharge requirement, will be approximately 866,943 cubic feet. In order to maintain the county's adopted level -of -service, the applicant will be required to retain approximately 643,117 cubic feet of runoff on-site. With the soil characteristics of the subject property, the estimated pre -development runoff rate is 74.97 cubic feet/second. Based upon staff's analysis, the drainage level -of -service standards will be met by limiting off-site discharge to the IRFWCD's maximum discharge rate of two inches in twenty-four hours, requiring retention of the 643,117 cubic feet of runoff for the most intense use of the property, and requiring that all finished floor elevations exceed 23.5 feet above mean sea level. JULY 119 2000 -125- IRA 114 PG 14 •