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Marion County <br /> OREGON SEPTIC SYSTEM REQUIREMENTS AND FIELD NOTES <br /> 111111 PUBLIC WORKS <br /> Design Flow GPD <br /> 300 <br /> Initial System Repair System <br /> System Type: System Type: <br /> Steep Slope <br /> Field Size: LF FiPId Size: LF <br /> Qo <br /> Size Factor: LF/150 GPD Size Factor: LF/150 GPD <br /> Install Depth (inches) Install Depth (inches) <br /> Min Max Min 30 Max 36 <br /> Special Requirements <br /> 25'setback to escarpment from DF,10'setback to tank(s),steep slope trenches must have at least 18"drain media and 12"backfill.stakeout required <br /> If 150 LF cannot fit within setbacks, ATT w/Steep slope drainfield (90LF) required <br /> Notes & Landscape Features <br /> steep backslope <br /> many large stumps, remove as few stumps as possible to protect soil stability <br /> indicate on site plan which stumps to remove <br /> excessive stump removal may require geotechnical report <br />