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- / Septic Site Evaluation 555-21-009085-EVAL Page 3 of 5 _ xr.qr 10 af*•, t•'�"Firy rc. + yy+ L+ t F � y,,,r�4 Spy �� £�.�' 'i''$ ¢^�- mr' :, !�'_ M,°'�' � ��' €�4yb �=�� .� ..�;�-s�r4��a:�--#fl4a.� �� ' Conditions of approval: Approved Area&System Type Soil test pits and other site features were evaluated during a site visit on July 21,2021. The conditions observed during the evaluation indicate that the area around the test pits is not suitable for a STANDARD system due to the following limitations: Temporary groundwater level is too close to the ground surface DEQ Rule requirement: Temporary groundwater level cannot come within 24"of ground surface for a Standard system,within 18°for an Alternative system with a Standard equal distribution drainfield,and within 12"for an Alternative system (on a slope of 12%or less with a Capping Fill drainfield). "Temporary groundwater"refers to a water table that completely dries up during certain times of the year.OAR 340-071-0220(1)(b)(B). Evidence of a temporary water table was observed at 16 inches below the surface in test pit#1,and at 18"at test pit#2. 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. With a Capping Fill drainfield,the effective soil depth may be 18"from the ground surface in soil no finer than silty clay loam. Under the conditions observed at the above address,a CAPPING FILL DRAINFIELD is approved in the area of TEST PIT#2 ONLY.An ALTERNATIVE TREATMENT TECHNOLOGY SYSTEM with a CAPPING FILL DRAINFIELD is approved in the area of TEST PIT#2 ONLY. Please refer to the signed approved site plan dated July 21,2021. Specific Requirements Please refer to the Site Evaluation Worksheet which shows the approved areas and other details of the site visit. A DETAILED SEPTIC SYSTEM STAKEOUTIS REQUIRED prior to the issuance of a septic system installation permit. The area for the system is very limited and a stakeout of both initial and replacement fields must be completed to determine that the system will fit within the area of the approved test pits. A scale drawn,detailed site plan must be submitted with the application for the installation permit. The stakeout must be inspected on the property and approved before the permit can be issued. Instructions for the stakeout are attached and are available in our office. CAPPING FILL systems are installed in soils where a layer that limits the effective soil depth or a water table is present in the soil profile at a depth shallower than allowed for a Standard system. The disposal trenches are installed at a very shallow depth and approved fill is placed over the trenches to provide earth cover over the system. Fill material must be evenly graded over the DRAINFIELD and crowned at the center to shed rainfall. CAPPING FILL SYSTEMS MAY ONLY BE INSTALLED BETWEEN JUNE 1 AND OCTOBER 1 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. AN EFFLUENT LIFT PUMPW1LL 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 in the dosing tank,the wiring in the trench and the connections in the structure must be done under a Marion County Electrical Permit. Additional Conditions of Site Approval 1. This site is approved for the type of disposal system described above. 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. This is normally sufficient to serve a residence with 4(four)bedrooms. Premature failure of the treatment system may occur if either of these CALL BEFORE YOU DIG...IT'S THE LAW ATTENTION:Oregon law requires you to follow rules adopted by the Cregon 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 far the Oregon Utility Notification Center is 1-800.332-2344.) 10/7/21:9:16:37AM Page 3 of 5 ONS_OnsiteEvaluation_pr