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BOOK ��, FAGE •�� This is based upon a level of service of 250 gallons/ERU/day. Development on the subject property would be served by the North County Reverse Osmosis Plant which currently has a remaining capacity of approximately 2,300,000 gallons/day and can accommodate the additional demand generated by the proposed rezoning. Wastewater Based upon the most intense use allowed under the proposed zoning, development of the property will have a wastewater generation rate of approximately 114 Equivalent Residential Units (ERU), or 28,500 gallons/day. This is based upon the level of service standard of 250 gallons/ERU/day. If development on the subject property connected to county wastewater service, that development would be served by the Central Regional Wastewater Treatment Plant, which currently has a remaining capacity of more than 1,200,000 gallonstday 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 personstunit, a 114 unit residential development would be anticipated to house approximately 263 people (2.3 X 114). 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 518 (263 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 820,000 cubic yards. The active segment of the landfill has a 2 year capacity, and the landfill has expansion capacity beyond 2020. Based on the analysis, staff determined that the county landfill can accommodate the additional solid waste generated by the site under 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 does not apply, since the property does not he within a floodplain. On-site retention and discharge standards, however, do 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 11.4 acres, or 496,584 square feet. The estimated runoff volume, based on that amount of impervious surface and the 25 year/24 hour design storm, will be approximately 516,330 cubic feet. In order to maintain the county's adopted level of service, the applicant will be required to retain approximately 378,645 cubic feet of runoff on-site. With the soil characteristics of the subject property, it is estimated that the pre -development runoff rate is 54.99 cubic feet/second. Based upon the County Engineering Division's analysis, the drainage level of service standards will be met by limiting off-site discharge to its pre -development rate of 54.99 cubic feettsecond, and requiring retention of 378,645 cubic feet of runoff for the most intense use of the property. NOVEMBER 16, 1999 -84- 9 0