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~r. Akaty Konev Page 2 June I~. 1979 The soil Series In the proposed dralnfleld area molt nearly resembles an Aloha Slit Loam, Past experleuce has shown that these suits respond favorably to artlficlal drainage by field tiling, During the field review of the property. no indication of a restrlctlve layer was encountered which would adversely affect the functioning of a tiling system, There are no public waters of the State nor sources of domestic water supply iooated In the }mmedlate vicinity of the proposed dralnfleld area, To overcome the temporarily perched ground water conditions on the property, the following site and system design modi- fications were offere~ In support of the varlance~ The development on the property Nlll be restricted to a single family residence having a maximum dally sewage flow of ~50 gallons or less, A ground water drainage system will be Installed around the perimeter of the drainfleld to artificially lower the temporarily perched ground waters during Inclement weather. To further ensure that the disposal trenches wl)l not likely come tn contact with the temporarily perched groun~ waters, a 12-Inch capping fill system will be ~onStructed. The original disposal treohes will be installed Only 12 inches deep into the original sol1 and then a 12-inch gap of earth wti! be filled over the complete syste~. Based upon my review of the property and the testimony ¢ontalned In the record, it Is my opinion that a health hazard or degradation of public ~aters would not likely occur by approvlng your variance request. AS such, your request for'variance from Oregon Admlnls~rat Rules, Chapter 3~O, Dlvislon 7, Sections 71-0ZO(~)(¢)~ 71-O20(~)(s)~ 71-030(I)(d)i and 71-030(k)(f)(F) is granted subject tO the fellowln condltions~