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•• 4 n w <br /> ` _,,,� Marion County OREGON SEPTIC SYSTEM REQUIREMENTS AND FIELD NOTES <br /> PUBLIC WORKS <br /> Design Flow GPD <br /> 450 <br /> Initial System Repair System <br /> System Type: System Type: <br /> AU w/ Hydrosplitter ATT w/ Hydrosplitter <br /> Field Size: LF Field Size: LF <br /> 150 150 <br /> Size Factor: LF/150 GPD Size Factor: LF/150 GPD <br /> 50 50 <br /> Install Depth (inches) Install Depth (inches) <br /> Min 18 Max 24 Min 18 . Max 24 <br /> Special Requirements <br /> Rural Area Consideration 340-071-0410 <br /> Notes & Landscape Features <br /> Up high on the hill, this area appears to be draining fairly well off of the hill top, <br /> lower down, however, the soil appears to have much poorer drainage as it approaches <br /> the creek on the property. The test holes dug maintain a sturdy setback to this creek and sit <br /> on the shoulder/side slope position of a hill. The soil depth is relatively thin, however, there does <br /> not seem to be a layer that limits soil depth.The saprolite is fractured, and the roots in the area seem to <br /> be infiltrating the stony material with relative ease. This office approves the use of pre-treatment to <br /> attenuate the effluent and a hydrosplitter to ensure equal effluent application to this area. <br />