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II. INVENTORY OF EXISTING SYSTEMS <br />A. Inventory Procedures & Content <br />The City of Orono undertook a program to inspect and <br />inventory the City's existing septic systems commencing in 1978, <br />hence fairly accurate information exists regarding the location, <br />design, and layout of septic systems and wells in the Stubbs Bay <br />Area. A detailed, scaled layout of each affected property has <br />been drawn in order to assist in the determination of the <br />technical feasibility of repairing or replacing the systems in <br />the area (see Appendix 2). The drawings are scaled at 1"=301, <br />1"=40'01 1"=50', or 1"=601, and in most cases are based on the <br />City plat maps, air photos, and field measurements in order to <br />provide accurate relative building and system locations. In many <br />cases actual certificates of survey were used as a base mnp. <br />The inventory drawings show the following information: <br />1. Property boundaries <br />2. Location of house, septic system component n, well, <br />driveway, street, accesoory buildings <br />3. 50' minimum well -to -septic tank and drainfield <br />setback required by Minnesota Health Department and 75' <br />well-to-drainfield setback required by Orono Code <br />4. 10' minimum setbacks to property line, house and <br />other hardcover <br />5. Steep slopes (where critical) <br />Orono's Code requires a 75' setback for wells from any <br />septic system, drainfie_ld or unsealed septic tank, and 20' <br />setback for drainfields from property lines and hardcover area. <br />A well setback of less than 50' requires a variance from the <br />Minnesota Health Department and is rarely granted. The MPCA <br />recommended performance standards (MCAR-7080) maintain a minimum <br />10' septic system setback from houses and property lines. The <br />50' well and 10' hardcover setbacks used in the inventory <br />drawings are considered to be the minimum allowable setbacks, and <br />are referenced herein as the "relaxed standards" for inventory <br />purposes. The inventory drawings also indicate the 75' Orono <br />well setback requirement. <br />N <br />