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Onsite Permit 555-18-004425-PRMT Page 4 of 6 Schedule Inspections online at www.buildingpermits.oregon.gov or by calling: 1-888-299-2821 or 503-588-5147 When calling for an inspection,use IVR Number:555054493034 •Date issued 7113/i8 ; 7 Xptratondatek1,43/19' Work tesc�tptron NEWATTANSTALL FOR4 BDRM RES Conditions of approval Approved Area&System Type This property has been approved for an ALTERNATIVE TREATMENT TECHNOLOGY SYSTEM Treatment Standard 1 in the area of the test pits approved under Site Evaluation 555-17-006810. The proposed system stakeout has been approved and installation plans have been approved as submitted. Please refer to the signed approved site plan dated July 9,2018. Any deviation from the approved plans must be authorized by this office prior to installation or the permit may be voided. The required inspection schedule is attached to this permit. It's the responsibility of applicant/installer to coordinate these requirements with all others in OAR 340-071-0220. This Permit is for a system designed to serve a single family dwelling with a maximum of four(4)bedrooms. Peak sewage flow into the system is limited to a maximum of 450 gallons per day,with an average sewage flow of not more than 225 gallons per day. Premature failure of the treatment system may occur if either of these flow quantities is exceeded. If,for some reason,you expect your domestic household water use may exceed these flows, it is advisable to increase the size of the treatment system. Specific Requirements ATT Pretreatment Unit: Advantex AX20-RT as per approved attached plan. SERVICE CONTRACTS: The owner of an ATT system must maintain a service contract with a maintenance provider certified by the manufacturer to service and maintain the onsite system. A service contract must be entered into before the system is installed and must be maintained until the system is decommissioned. The service contract must provide for a minimum of four inspections and service visits by a maintenance provider scheduled once every six months over a two-year period to inspect,adjust,and service the ATT. The septic tank must be pumped before solids reach 30%of the tank liquid operating level. The maintenance provider must submit an annual report and fee. Please review OAR 340-071-0345 for full requirements. DRY SOIL CONDITIONS ARE REQUIRED FOR INSTALLATION(March 1 —October 31) The geographical area in which the property lies is considered a risk to installation during winter months. Soil moisture conditions generally preclude construction of the drainfield in the winter months. GRAVELLESS ABSORPTION TRENCHES ARE REQUIREDas part of this installation. Hole spacing in the pressure distribution piping will be 24 inches on center or less. A minimum 2-foot squirt height is required at the remotest orifice. Green tracer wire is required above the piping and each line must end with a long sweep elbow and flushing orifice with removable cap at or above finished grade. Each pressure lateral must have at least one inspection port with minimum diameter of 6 inches. Chamber must be supported by at least 4 inches of drain media(drainrock)to provide adequate footing. A barrier to prevent burrowing animals from entering the absorption chambers is required. TANK RISER: The tank must be installed with watertight risers extending to the ground surface or above. The riser lid must be gasketed and securely fastened. ANTI-BUOYANCY is required for septic tank and ATT pod installation at this site. See manufacturer's • specifications for anti-buoyancy. AN EFFLUENT LIFT PUMP WILL BE REQUIRED to install the septic system disposal field in the approved area and at the required depth. Detailed instructions for dosing tank/effluent pump installations are available in our office. The electrical wiring to the pump and alarm must be installed in accordance with the appropriate Electrical Code. The electrical work must be done under a Marion County Electrical Permit and must be inspected and approved by a Marion County Electrical Inspector. The work must be left uncovered and 7/13/18:8:47:31AM Page 4 of 6 ONS_OnsitePermit_pr