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A. Density <br />The maximum dwelling unit density within an open space planned unit development shall <br />be 18 units per 40 acres of buildable land (0.45 dwelling units/acre) on the undeveloped <br />parcel; however, the total number of dwelling units shall not exceed the density limitations <br />contained in the Comprehensive Plan for Opens Space Preservation Development. <br />B. Lot Design <br />Lot locations and configurations within open space planned unit developments shall be <br />derived utilizing the following methodology. An applicant must be able to demonstrate how <br />these steps resulted in the plan being proposed. <br />1. Soils Analysis Conducted <br />A certified septic designer or soils scientist shall complete a review of the soils on the <br />site, and categorize all areas as highly suitable for septic systems, moderately suitable <br />for septic systems, or poorly suited for septic systems. <br />2. Septic Design Identification <br />Based on the soils analysis, an applicant must identify whether the proposed <br />development will be serviced by individual septic tanks and drain fields, or via a system <br />of individual septic tanks which utilize one or more communal drain fields. <br />a. If individual septic tanks and drain fields can be supported by the available soils <br />and is the chosen methodology to serve the development, all proposed lots must be <br />able to provide primary and secondary drain field sites on each lot (outside of <br />drainage and utility easements), and must meet the minimum lot size standards <br />outlined herein. <br />b. If individual septic tanks which utilize a communal drain field (or fields) is the <br />chosen methodology to serve the development, then the location(s) for communal <br />drain fields shall be identified within the area(s) deemed the most suitable on the <br />site for supporting septic utilities according to the soils analysis. All such areas <br />shall be clearly denoted on provided plan sets. <br />3. Identification of Required Buffers <br />No build zones from each property boundary shall be derived as follows: <br />a. A two -hundred (200) foot buffer from all adjacent property lines that abut an <br />existing residential development or a parcel of land not eligible for future <br />development as an open space planned unit development due to insufficient parcel <br />area. <br />b. A one -hundred (100) foot buffer from all adjacent property lines that abut land that <br />is eligible for future development as an open space planned unit development. <br />c. If the development site is adjacent to an existing or approved OP development, the <br />required buffer shall be equivalent to the buffer that was required of the adjacent <br />development [see § 154.035(B)]. <br />4 <br />