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Onsite Permit 555-18-005703-PRMT Page 3 of 5 Date issued 8/91!8 /. Expiration date $19119 Work description NEW INSTALL 3 BDRM SFD s Conditions of approval Approved Area&System Type This property has been approved for an ALTERNATIVE TREATMENT TECHNOLOGY Treatment Standard 1 in the area identified in Site Evaluation Report 555-14-004953-SEP. A Capping Fill with Tile Dewatering is required for the drainfield. Proposed system stakeout has been approved and installation plans are approved as submitted. Refer to approved plans dated August 7, 2018. The installation must conform to these approved plans. Any changes or product substitutions must be approved by this office prior to installation. Any substantial changes may require complete revised plans with a plan review fee. Failure to comply may invalidate construction approval and permit. 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: AX20-RTN 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. 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. 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 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 accessible for inspection. The electrical inspection includes the connections to the pump and alarm in the dosing tank, the wiring in the trench and the connections in the structure. HEADER PIPE between Distribution Box and drainfield trench must measure a minimum of 4 feet, must be installed level, and bedded on undisturbed earth. CAPPING FILL SYSTEMS MAY ONLY BE INSTALLED FROM JUNE 1ST TO OCTOBER 1ST or during such times when the Building Inspection Onsite Wastewater staff finds soil moisture conditions acceptable. See the attached"CAPPING FILL" information sheet for instructions. TILE DEWATERING system must be installed at a depth adequate to lower the saturation zone to below the drainfield trench. Tile dewatering trench must be constructed a minimum 12 inches wide,with a uniform trade of 0.2 to 0.4 feet of fall per 100 feet. Minimum trench depth is 43 inches with 31 inches of clean drain media or underdrain media (gravel) placed over a 4-inch perforated pipe (ASTM Specification F 405, D 2729 or F 810). Silt trap must have a 12-inch minimum diameter and effective trap area at least 12 inches below the invert of the outlet. Additional construction requirements are enclosed. OBSERVE ALL SETBACKS AND SEPARATION DISTANCES as required by the DEQ rules. A copy of the DEQ setback requirements is available in our office and online at 8/9/18:8:37:11AM Page 3 of 5 ONS_OnsitePermitpr