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- Solid Waste <br />Solid waste service includes pick-up by private operators and <br />disposal at the county landfill. The county's adopted level of <br />service standard for landfill capacity is 2.37 cubic yards/person/ <br />year. With the county's average of approximately 2.3 persons/unit, <br />a 49 unit residential development would be anticipated to house <br />approximately 113 people (2.3 X 49). For the subject request to <br />meet the county's adopted level of service standard of 2.37 cubic <br />yards/person/year, the landfill must have enough capacity to <br />accommodate approximately 268 (113 X 2.37) cubic yards/year. <br />A review of the solid waste capacity for the active segment of the <br />county landfill indicates the availability of more than 850,000 <br />cubic yards. The active segment of the landfill has a 2 year <br />capacity, and the landfill has expansion capacity beyond 2010. <br />Based on the analysis, staff determined that the county landfill <br />can accommodate the additional solid waste generated by the site <br />under the proposed zoning district. <br />- Drainage <br />All developments are reviewed for compliance with county stormwater <br />regulations which require on-site retention, preservation of <br />floodplain storage and minimum finished floor elevations. In <br />addition, development proposals must _ meet the discharge <br />requirements of the county Stormwater Management Ordinance. Any <br />development on the subject property will be prohibited from <br />discharging any runoff in excess of the pre -development rate. <br />In this case, the minimum floor elevation level of service standard <br />applies, since the property lies within a floodplain. Consistent <br />with Drainage Policy 1.2, "all new buildings shall have the lowest <br />habitable floor elevation no lower than the elevation of the 100 - <br />year flood elevation as•shown on the Federal Emergency Management <br />Agency's Flood Insurance Rate Map, or as defined in a more detailed <br />study report." Additionally, section 930.07(2) of the county's <br />LDRs requires that all residential development shall have the <br />lowest floor (including basement) elevated to six inches or more <br />above the base flood level. Since the subject property lies within <br />Flood Zone AE -8, which is a special flood hazard area located <br />within the 100 -year floodplain, any development on this property <br />must have a minimum finished floor elevation of no less than 8.5 <br />feet above mean sea level. <br />Besides the minimum elevation requirement, on-site retention and <br />discharge standards also apply to this request. With the most <br />intense use of this site, the maximum area of impervious surface <br />under the proposed zoning classification will be approximately <br />144,619 square feet, or 3.32 acres. The maximum runoff volume, <br />based on that amount of impervious surface and the 25 year/24 hour <br />design storm, will be approximately 219,230 cubic feet. In order <br />to maintain the county's adopted level of service, the applicant <br />will be required to retain approximately 39,352 cubic feet of <br />runoff on-site. With the soil characteristics of the subject <br />property, it -is estimated that the pre -development runoff rate is <br />68 cubic feet/second. <br />Based upon staff's analysis, the drainage level of service <br />standards will be met by limiting off-site discharge to its pre - <br />development rate of 68 cubic feet/second, requiring retention of <br />39,352 cubic feet of runoff for the most intense use of the <br />property, and requiring that all finished floor elevations exceed <br />8.5 feet above mean sea level. <br />27 <br />JULY 239 1996 BOR 98 rn 60 <br />