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SAND FILTER SYSTEM Tax Lot: Section ~ Twp: ,,.~, Rug: ,~=~_7 W.,M. I. Your site has been found suitable for an ALTERNATIVE SAND FILTER ........... SYSTEM. The following coestruction specifications shall apply. ~/a. The septic tank shall have a minimum liquid capacity of -- /~.~p gallons . ____./b. The drainfield shall be constructed in (Serial -~"~ distribution with a maximum trench depth of /~aed a minimum,.trench depth of, /~ inches. The~e ~ust be at least (~ inches of ba~:f'ill over the top of the gravel, measured from natural ground surface. With the'soil conditions observed om this sate. ~ lineal feet of disposal trench will be required per 150 gallons maximum pro3ected daily sewage flow. For your proposed development, a minimum of ~) lineal feet of disposal trench is required. Disposal trenches shall be constructed 2 feet wide on 10 foot minimum centers with no line exceed- lng 125 feet in length. The trenches and perforated pipe shall be installed within one inch of level and contoured to the natural ground surface. A groundwater interceptor is required ss part of this system. This interceptor must be constrected 12 inches wide by inches deep with inches of clean gravel placed over a 4 inch perforated pipe. A minimum 10 foot upslope setback must be maintained from the drainfield and be exhausted by a non-perforated line below and away from the entire system. An effluent lift pump may be necessary to construct the drainfield in the approved[area at the correct~'depth. The JFor sanitation purposes, single building site i~. A capping fill is required: with this system. Construction of the capping fill shall be indicated in the attached construction detail sheet,i The sand filter shall be designed and operated as per OAR 340-71-290 through 340-71-305. Detailed plans for the filter must be presented prior to permit issuance. Depend- ing on design, a separate building permit may also be re- quired, ii For the above described sy?tem(s), adequate area must be available for the original' system and a complete replacement system. The replacement system is to be used if the origi- nal system fails for some ,non-repairable reason. conditions of approval are las follows: t,he. minimum lot size for ti%is This lot sA~e will requireI ~n off-site community water supply. '~ i, Subsurface sewage disposal will. not be permitted on slopes in excess of .... perce~t. No part of the system shalli~be installed within the 'easement rlgh ~-o£-wsy,