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- M M b. in outlying areas where low density residential zoning districts abut groves, grove use is likely to continue for a longer period of time than in areas zoned for higher densities. Therefore, subdivisions in lower density areas will probably need protection from spraying for longer periods of time. Based upon these assumptions., and to better address the equity issue, staff now proposes that the Planning and Zoning Commis- sion's more intensive requirements be applied to projects in zoning districts allowing development at 1 unit/acre or less [A-1, RFD, RS -11, and staff's initially proposed requirements apply to projects in zoning districts allowing development a more than 1 unit/acre [RS -2, RS -3, RS -6, RT -6, RM -3, RM -4, RM -6, RM -8, RM -10, RM -14 ... ]. The result: no substantive change in existing re- quirements in areas zoned for "normal" residential density. In =- areas where greater setbacks are easy to accommodate and where buffering is more likely to be needed for a longer period of time, stricter requirements are applied. Please refer to attachment #4, "Table: Issues and Proposed Requirements". Section 2 This amends section 25.1(a)(3) of the zoning code, specifying that for agricultural research facilities a buffer is required between the facility and/or cultivated areas and adjacent non-agricultural uses. Like the section 3(a)l.(e)(3)f amendment, this amendment specifies to what structures and areas the 50' setback option applies, and also specifies an option to provide a 25' buffer with Type "A" screening. RECOMMENDATION: Staff recommends that the Board of County Commissioners adopt the attached ordinance amendments. Commissioner Eggert wished to know why.staff rejected the P6Z Commission's proposal to have 1 tree planted every 20 linear feet when that has the potential of becoming a continuous screen. Planner Boling agreed it does, but felt a 40' separation does as well; it is just a matter of time. Commissioner Eggert did not go along with that argument, and Planner Boling continued that staff's reasoning is that the 20' tree separation on that planting is twice as much as the normal Type "A" buffering screen that we have had and that does work. It will provide a more continuous screen, but again, he felt the question is how long does it take even that 20' planting screen to develop. Commissioner Bird inquired what type trees they are talking about, and Planner Boling stated probably oaks. 74 BOOK 73 mu 572 liftAUG 2 3 1988