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„ ..,,, Marion County <br /> ;.. OREGON SEPTIC SYSTEM REQUIREMENTS AND FIELD NOTES <br /> MtPUBLIC WORKS <br /> Design Flow 450 GPD <br /> Initial System Repair System <br /> System Type:Standard Equal System Type: Standard Equal <br /> Field Size: 450 LF Field Size: 450 LF <br /> Size Factor: Size Factor: <br /> 150 LF / 150 gal. 150 LF / 150 gal. <br /> Install Depth (inches) Install Depth (inches) <br /> Min 18 Max 19 Min 18 Max 19 <br /> Special Requirements <br /> If 18” min, 19" max depth cannot be achieved, capping fill can be used. In tha <br /> case, a capping fill detail should be submitted, depth of cap should be 10". <br /> Notes & Landscape Features <br /> If 10" capping fill is used, submit full details at time of permit. <br /> If 10" capping fill is used, installation depth will be 12" min 19" max from original ground surface. <br />