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April 15, 1992 <br /> <br />APPLICANT: <br />SITE NUMBER: <br /> <br />BAND FILTER SYSTEM CONSTRUCTION DETAIL SHEET <br /> <br /> REPLACEMENT SYSTEM <br /> <br />DONALD BORNER <br />13389 <br /> <br />Your site has been found suitable for a SAND FILTER ALTERNATIVE SEWAGE <br />DISPOSAL SYSTEM. The following construction specifications shall apply to the <br />installation of your septic system. <br /> <br />The septic tank shall have a minimum liquid capacity of 100Q <br />gallons. <br /> <br />The projected daily sewage flow for this project is calculated at <br />450 ..qallons per day. Based on soil conditions observed on this <br />site, the disposal field will be sized at 45 lineal feet per <br />~allon~ of projected daily sewage flow. A minimum of 135 lineal <br />feet of disposal field will be required for your proposed develop- <br />ment. The disposal trenches are constructed two (2) ~eet wide and <br />on minimum ten (10) foot centers and with no line e~ceeding 125 <br />feet in length. The trenches and perforated pipe are installed <br />level (~1") a~d contoured to follow the natural ground surfac~. <br /> <br />The disposal field shall be constructed with equal.., distribution <br />with a minimum trench depth of 24 inches and a maximum trench <br />depth of 24 inche~. There must be at least 12 inches of backfill <br />over the top of the gravel, measured from the natural ground <br /> <br />The sand filter system shall be designed and operated as per OAR <br />340-71-290 through 340-71-305. beta&led plans fo~ the system mu~t <br />be submitted prior to permit issuance. A building permit is <br />required if a site built concrete box is used as the sand filter <br />container. A ~a~phlet is available in our office which details the <br />requirements for a sand filter system. <br /> <br />This approval is skte specific to the area tested and the septic system must <br />be located in the immediate area of the test pits unless otherwise authorized <br />by this office. A new site evaluation may be required if the system is <br />proposed for a different area on the property. <br /> <br />SPECIAL CONDITIONS: <br /> construct the sand filter drainfields with in the immediate area of the <br /> soil test pits. <br /> <br />T_~IS IS NOT A EERMIT TO INSTALL THE SEPTIC SYSTEM. DO NOT ,INSTALL THE SYSTEM <br />UNTIL A VALID PERMIT HAS BEEN ISSUED BY THIS OFFICE. <br /> <br /> <br />