1979-03-07 Septic System Design Report

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SITE ?VAi TTATION R�?-ORT ;-'OR-�T:3IN's'R & KO , ,; FAN, INC. IN LOT 2, BL,)CK 1, N11RS :;;iY March C, 19,119 As requested , and according to the city of Orono regulations, six percolation tests and three soil borings were taken on March 3-4, 1979. Percolation holes were dug to a depth of 42 inches being o inches in diameter. Boles were dug with a Dayton model a?014 C auger. No frost was encountered and styrofoam was placed over the holes overnight to keep the water from freezing. the soil borings were dug with the Dayton auger to a depthof 42 inches, with a 3" bucket type hand auger being used for the remaining depth. The proposed drainfield area is located in the Lester Loan soil series and yielded an average percolation rate of 9.6 min. uer inch. Discoloration of the soils indicates that the water table will be somewhat higher in the spring than the present water table indicates. However, the requirements for a standard drainfield system are still met. For the proposed 3 bedroom house, 570 square feet of soil treatment area is required. If 2 foot wide trenches are used , three 100 foot long trenches are needed. Each should be spaced 6.5 feet minimum center to center making the total width 13 feet. More lines of shorter lengft can also be used. Lines should be constructed to follow the contours. The lot should also be graded to divert rui►off away from the soil treatment area. Two septic tanks are required. yach should be of 10JO gallon capacity. They should be located at least 10 feet from the house. In addition , if the basement is to be served by the sewer, a oump and t)um,>ing tank will be needed to pump the effluent to the higher drainfield area if the house elevation remains as proposed.