04-22-1985 Council Packet - Laserfiche WebLink

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II. INVENTORY OF EXISTING SYSTFMS A. Inventory Procedures and Content The City of Orono undertook a program to inspect and inventory the City's existing septic systems commencing in 1978, hence fairly accurate information exists regarding the location, design, and layout of septic systems and wells in the Crystal Bay area. A detailed, scaled layout of each affected property has been drawn in order to determine the technical feasibility of repairing or replacing the systems in the area. (See Exhibit B) The drawings are scaled at 1" _ 20, 1" = 30'1 1" = 40', or 1" = 60', and in most cases are based on the City plat maps, air photos, and field measurements in order to provide accurate relative building and system locations. In some cases actual existing certificates of survey were used. The inventory drawings show the following information: 1. Property boundaries 2. Location of house, septic system components, wells, driveway, street, accessory buildings 3. 50' minimum setback (well to septic tank and drainfield) required by Minnesota Health Department 4. 10' minimum setbacks to property line, house and other hard- cover 5. Steep slopes (where critical) The relaxed well and hardcover setbacks used above are considered to be the minimum allowable setbacks. Orono's code requires a 75' setback for wells from any septic system drainfield or unsealed septic tank, and 20' setback for drainfields from property lines and hard- cover area. A well setback of less than 50' requires a variance from the Minnesota Health Department and is rarely granted. The MPCA recommended performance standards (WPC-40) maintain a minimum 10' septic system setback from houses and property lines. The inventory listing (Appendix 2) defines each property by ad- dress, and acreage, and contains information on the well/septic separ- ation distances, notes current or past septic system problems, indi- cates a relative level of code compliance of each existing system, and assesses the potential of each site for repair/replacement of the existing system. In addition, a subjective rating on a scale of 1 to 5 (1 is best) is given in comparison to the study area P d to the rest of unsewered Orono. B. Inventory Results Perhaps the most enlightening information to be gained from the inventory is the potential capability of each property to !:!.Export a replacement septic system within the confines of the minimum "ity and estate sanitary code requirements. See Exhibits A 6 B. r