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Septic Site Evaluation 555-20-009306-EVAL Page 4 of 6 Date issued:01/13/2021 Application status:Site Evaluation Approved Work description: SE REPL 3 BDRM MANF HM W/NSFD 8 BDRM*SAME FOOTPRINIT Conditions of approval: Permanent groundwater level is too close to the ground surface: DEQ Rule requirement: Permanent groundwater level cannot come within 48"from the bottom of an absorption facility for a Standard or capping fill system or within 24"from the bottom of an absorption facility for an Alternative Treatment Technology system. "Permanent groundwater"refers to a water table that exists year-round. OAR 340-071-0100(101) Description: Treatment of sewage occurs in the soils around the drainfield area. If groundwater comes in contact with the sewage before it has been adequately treated in the soils,there are two concerns: 1)very little treatment occurs in saturated soils—the presence of air is required for good treatment; and 2)sewage may be"forced"to the surface where it poses a potential public health hazard. Evidence of a permanent water table was found at 36-48 inches in each of the respective pits. Depth to Soil with Rapid or Very Rapid Permeability DEQ Rule requirement: Soil with rapid or very rapid permeability must be 36"below the ground surface. "Soil with rapid or very rapid permeability"refers to sandy loam or coarser soil with 35%or more coarse fragments over 2mm; loamy sand or sand; or stones, cobbles, gravel and rock fragments with too little soil material to fill the void spaces. OAR 340-071-0220(1) (c) Description: Treatment of sewage occurs in the soil around the drainfield area. If the sewage enters the groundwater before it has been adequately treated in the soil, it poses a potential public health hazard. A layer of rapid permeability was observed around 14 inches at this site. Under the conditions observed in the vicinity of the test pits, an ALTERNATIVE TREATMENT SYSTEM—TREATMENT STANDARD#2 is required by DEQ rules for the INITIAL AND FUTURE REPAIR systems,with a PRESSURIZED DISTRIBUTION,CAPPING FILL DRAINFIELD.Alternately, a gravelless absorption drainfield may be installed in lieu of a capping fill drainfield. Please refer to the signed approved site plan dated January 8,2021. Alternative Treatment systems include Sand Filters, Recirculating Gravel Filters and Alternative Treatment Technologies (ATTS). Alternative systems are installed where soil,drainage,water table levels or space limitations do not allow for a Standard system installation. The unit pre-treats the septic tank effluent before it is discharged into the ground. The owner of a Sand Filter,RGF or ATT system must maintain a service contract with a licensed and certified professional 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. 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 CALL BEFORE YOU DIGITS THE LAW ATTENTION:Oregon law requires you to follow rules adopted by the Oregon Utility Notification Center. Those rules are set forth by Oregon Administration Rules. You may obtain copies of the rules by calling the center.(Note:The telephone number for the Oregon Utility Notification Center is 1-800-332-2344.) 1/13/21:2:55:35PM Page 4 of 6 ONS_OnsiteEvaluation_pr