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Onsite Permit 555-18-003905-PRMT Page 4 of 6 Schedule Inspections online at www.buildingpermits.oregon.gov or by calling 1-888-299-2821 or 541-388-6575 When calling for an inspection,use IVR Number:555018187580 u�ll 6114t1e r r I "w tMoii deaerlpdon ATT INSTALL Fs- oaA 4 • '. r :44 ,.44. Conditions of approval Approved Area&System Type: This property has been approved for an Alternative Treatment Technology (ATT)System with gravelless drainfield in the area identified in Site Evaluation Report 08-03243. System plans reflect the stakeout and are approved as submitted. Please refer to the signed approved plans dated June 13, 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 approval is for a system designed to serve a single family dwelling with a maximum of 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 serve 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 maintenance provider must submit an annual report and fee. Please review OAR 340-071-0345 for full requirements. 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. A barrier to prevent burrowing animals from entering the absorption chambers is required. TANK RISER: The tanks must be installed with watertight risers extending to the ground surface or above. Components must be easily accessible for servicing and maintenance. ELECTRICAL COMPONENTS ARE REQUIRED FOR INSTALLATION OF THIS SEPTIC SYSTEM. Detailed instructions for dosing tank/effluent pump installations are available in our office. The electrical wiring to the pumps 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 accessible for inspection. The electrical inspection includes the connections to the pump and alarm in the ATT unit and the dosing tank,the wiring in the trench and the connections in the structure. A CURTAIN DRAIN(GROUNDWATER INTERCEPTOR)IS REQUIRED as part of this system to divert groundwater from the drainfield. The curtain drain trench must be constructed a minimuml2 inches wide by 42 inches deep with 30 inches of clean drain media placed over a 4 inch perforated pipe(ASTM Specification F 405, D 2729 or F 810). Drain media must be placed a minimum of 2 inches under the pipe. The drain media must be covered with filter fabric. Outlet pipe must be rigid,smooth-wall, solid PVC pipe meeting or exceeding ASTM Standard D-3034. The outlet must be fitted with a flap gate or rodent guard. The curtain drain must be located at least 10 feet up slope from the disposal field and must discharge through a watertight non-perforated pipe beside or below the disposal field. A minimum separation of 10 feet is required from the septic tank if the tank is located up slope of the curtain drain and 5 feet 8 the tank is located down slope of the curtain drain. DO NOT INSTALL SYSTEM DURING WINTER MONTHS(Nov.1—March 1)The geographical area in which the property lies is considered a risk to installation during winter months. Therefore,for this installation a Marion County Onsite Wastewater Specialist must specifically approve soil moisture conditions at this site for installation to occur during the period from November 1st to March 1st. This may include a field visit directly 6/14/18:2:55:38PM Page 4 of 6 ONS_Onsnecermnyr