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Septic Site Evaluation 555-19-001240-EVAL Page 4 of 6 '�sHX,E,�,}�..psu ��(a� y-�.F.t�''9.: *ham ' 5l � '+�'� 3 1'+�},.'V� .� '__&e f!� sm �.¢ .+{Ta' 5 1�^-�I ,A's '.:3 �{"r'�a _ Y`. Date issued 04/11 20 9 %, .SH1 1 >�i ; ¢i 5s.¢Y: 'd'f k '�J ' 3� ESQ' 2�' ' �� 4 .-: 5b �� ry, Applicationistatus Sit EvaluattontApproYI( s t w�-��`-+ o. ct ir� >,,�i �'' f j; �" �� a�� ^d�- f '` +� ,-a� � � � a -vim a� �K-%: Work description:SE�FOR'OFFICE 15 PROPOSED EMPLOYEES �� m � �� g 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 orgravel filter or other alternative treatment unitprior to dispersal in the soil. P 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 •0❑❑❑0❑ Depth to evidence of groundwater •000❑0❑Wells located on the site or adjacent sites •0❑0❑0❑Slopes, escarpments, ground surface variations, topography 001:10000 Creeks or springs on the site or adjacent properties •000❑❑❑Whether the soils have been disturbed •0❑❑❑0❑Setbacks from property lines, buildings, water lines, and other utilities •0000❑❑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 February 19, 2019. The conditions observed during this site evaluation indicate that the area around the evaluated test pits IS NOT CAPABLE of supporting a Standard septic system due to the following limitation: Temporary groundwater level is too close to the ground surface DEQ Rule requirement: Temporary groundwater level cannot come within 24"of the ground surface for a Standard system. "Temporary groundwater"refers to a water table that completely dries up during certain times of the year. OAR 340-071-0220(1)(b)(B). "Conditions associated with saturation" refer to soil morphological properties caused by saturation that persists long enough to impair system function and create a potential health hazard. Conditions of saturation were noted in test pits at your site at 15, 16, and 27 inches. 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. 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.) 4/11/19:1:35:28PM Page 4 of 6 ONS_OnsiteEvaluation_pr