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"State 'of Oregon ; ' <br />DEPARTMENT OF ENVIRONMENTAL QUALITY <br /> <br />INTEROFFICE MIlO <br /> <br />To= North Ma~ion School Distr~ct NO. 15 <br />From~ 0ary Messet-s R.S. ~: <br /> <br />Date= ~ 28, 1976 <br /> <br /> SubjecS~ Subsurface Disposal System <br /> <br />On May.14. 1976, staff from the~Marion County Health Oeparl~nent and the Department <br />of Environmental Quality jointly ~evtew~d the proposal to develop a new public <br />school complex for the North Ma?on School District No, 15. <br /> <br />The proposed 600 student comple~ would be located on a 15.20 acre parcel on the <br />east side of CR 141, immediately across from the North Marion Elementary School. <br /> <br />Mr, Foster's counts accurately describe the soil conditiOnS a~d the necessity <br />to develop the sewage system on,the southern portion of the property. This will <br />further necessitate the )nstall~tion of a pumping ty~e system, in order to utilize <br />this area. Please refer to the"attached d~wing which .outlines the approved drain- <br />field area. For the development of a 600 student comp)ex.~t this location, it will <br />be necessary to install ten thoasand {lO,O00} lin~l, feet of disposal trenches. <br /> <br />The disposal t~enches a~e to be;constructed so as: ~. : <br /> a. To be a minimum of '~4 inches wide. <br /> b. To be a consistent depth of 30 inches. <br /> c. To have a total graveliaggregate of 18~lnches;'l~ inches of which shall <br /> be located below the d~sposal :pipe. <br /> <br /> <br />