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Septic Site Evaluation 555-19-002310-EVAL Page 3 of 4 Vat A970Va .'��,�.-�i .» '.... v%.. �.,s- ✓ sir �'r;',"�i5 $r�a .fi � Appli tr® : Y . alt anon Approved �^ti p �;� ` �d r s tr Tt1Rl BARN 4 P7=0PLE � z ase - '..m. e f a s v General Description of Site Evaluations Sewage contains disease-causing organisms and other pollutants that can cause adverse impacts to human health and the environment. An onsite sewage disposal system must treat and dispose of sewage in a way that will not cause a public health hazard, contaminate drinking water supplies,or pollute public waters. Proper treatment in an onsite system begins with primary treatment in the septic tank. The septic tank separates the solid particles in sewage from the liquid. The liquid that comes out of the septic tank is called effluent. The effluent may then be dispersed in the soil for further treatment or discharged into a secondary treatment device such as a sand or gravel filter or other alternative treatment unit prior to dispersal in the soil. For proper treatment,the effluent must slowly infiltrate into the underlying soil. Dissolved wastes and bacteria in the effluent are trapped or adsorbed to soil particles or decomposed by. microorganisms. This process removes disease-causing organisms, organic matter, and most nutrients. Effluent that comes to the ground surface(through poor soils or other problems with the system)can be a possible health hazard because it may still contain some disease-causing organisms. Soil that drains too quickly may not give the effluent enough treatment and may result in groundwater contamination. The purpose of the evaluation is to locate suitable soils in an area that is large enough for both the initial drainfield area and the replacement drainfield area. The criteria used for this site evaluation can be found in Oregon Administrative Rules (OAR)340-071. In the site inspection,the following features are evaluated: • Soil types-how well they drain and other indicators of good soil structure for treatment • Depth to evidence of groundwater • Wells located on the site or adjacent sites • Slopes,escarpments,ground surface variations,topography • Creeks or springs on the site or adjacent properties • Whether the soils have been disturbed • Setbacks from property lines,buildings,water lines, and other utilities • Other site features that could affect the placement of your onsite system Approved Area&System Type Soil test pits and other site features were evaluated during the site visit on April 23,2019. The conditions observed during this site evaluation indicate that the area around the evaluated test holes is capable of supporting a STANDARD SEPTIC SYSTEM for the INITIAL and for the REPAIR. Please refer to the signed revised approved site plan dated May 29,2019. 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. ALL COMMERCIAL SEPTIC SYSTEMS REQUIRE AN EFFLUENT FILTER. Additional Conditions of Site Approval 1. This approval is for a system designed to serve a Commercial Business Office. Peak sewage flow into the systemis limited to a maximum of 150 gallons per day,with an average sewage flow of not more than 75 gallons per day. This is normally sufficient to serve a facility with up to 10 employees. Premature failure of the treatment system may occur if either of these flow quantities is exceeded. If, for some reason,you expect your water use may exceed these flows, it may be advisable to increase the size of the treatment system. 2. Any alteration of natural soil conditions(i.e.cutting or filling)in the acceptable area may void this approval. 3. Both the initial and replacement disposal areas are to be protected from traffic, livestock and farming activities, development or other potential disturbance of natural soil conditions. 4. The area must not be subjected to excessive saturation due to,but not limited to, artificial drainage of ground surfaces, roads,driveways and building down spouts. 5. This approval is given on the basis that the parcel described above will not be further partitioned or subdivided. 6. Placement of a well within 100 feet of the approved areas may invalidate this approval. This site approval is valid until the system approved above is constructed in accordance with a Marion County issued Construction-Installation permit. Technical rule changes shall not invalidate this approval, but may require use of a different kind of system. The site approval runs with the land and will automatically benefit subsequent owners. CALL BEFORE YOU DIG...ITS 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.) 5/30/19:11:02:33AM Page 3 of 4 ONS_OnsiteEvaluationpr