2012-01059 - septic - Laserfiche WebLink

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1V/1V/GU1G RGU VO: 1G rHA OlLy4LS1L4 UUUGLAa JUKC�IV YK1NT l£/JUU3 Rex Blauer repoR cont; pg-2 The size of At-Grade system need for a 3-bedroom home would be the following size; Sizing factors; Daily Water Use;--450 gal/day Perc. Rate-- 16.5 min/in( Loam Soil range 16-30 min/in. ) Land slope—b % Overall Size; 21.5 ft.by 91 ft long Rock bed 10 ft. wide by 75 ft. long However due to the available land area we would have to use 2 rock beds that are 10 ft,wide by 37.5 ft. long each The total area needed for the At-Grade System would be32 ft. wide (North end) and 41.5 wide ( south end ) and 54 ft, long * The reason for the difference in widths from the north end to the south end is to maintain that the rock beds are level from end to end and fit the natural land contour. Amount of material needed; Rack-20 yds yds. 28 tons. ( Average depth-9 inches) Sandy Loam---45 yds. (" "– 6 inches) Topsoil–b0 yds. (" "–6 inches) The above amounts could vary by f 0%plus or minus. This AT-Grade system must be pressurized;therefore a pump and a pump is needed; Size of pump tank; 1-1000 gallon sealed tank ��a K Pumping Rate; --- 122 gal/cycle (4 cycles/day) Size of pump; 30 g.p.m. (must overcorne at least 9,0 ft. of head pressure) - This is base on'/<inch perforated holes that are spaced 3 ft. apart. Use 2-2 inch perforated pipe for ine manifold and this pipe should be installed on the top edge of the rock bed or I ft. from the upper edge of the rock and then a 10 ft.downslope of rock be installed from the pipe focation. The two rock beds are at different elevation ,therefore a Gate Valve must be installed between the upper rock bed and the lower rock and the pressure must be adjusted so the same squirt height is maintain in both manifold pipe Clean-outs must be located on the end of each 2-inch �ateral pipes An a3arm system must be installed in the house to indicate pump failure This must be both a sound and a light alarm system. There are 2-1000 gallon septic tanks that already installed and they were determine to be sealed tank and the baffles are in good shape See the enciosed tank integrity report for the detaits. These tank should be pumped out every 3 years ( City of Orono Codes) If this system is not instalied this fall,then it should be roped off to prevent construction traf�ic from compacting the soils, which will ruin the site, this will not have to be done if the system is installed immediately.. � '~`'�9 � Site Evaluator ��—- - �-�-�" - "�Rotrtrt•`R. Koch M.P.C.A. # 193l1429 �....d.._..�._.,....,.,,...•� _ . _ �,.�,,, �t�;�wi�� : � � �� ,,` � . .s�:��4 Y'r,� (J��5+.,1,Y� ��'�CJ�� .. `' . . :� . > ,rx,. . .�t��#1L ,Bud7c,, ., •.;�. ..3�: �. a t `� ' ' ; - y ,. � ;f„� S�:� «�!t V 4,x.�...r'i_,.r.,,,M ..•.uil7f Zt�it S.ic&--. .�,r:a s- �� . _ .. ...�_ �,...n .kc�.. ....... .,•.��Nii4Y:t-nN'• . , � . t . . . . . .. . .. _ �. .-- ., ,-t ,1M ..�l,.i�t,�. .