Laserfiche WebLink
'' , :. . - � . 4..' ' �. ... . .� . <br /> ���.:�..'tll :.� �...��:�� �81.:::yi��Jr� <br /> ' �'.O. G�xti31 <br /> , , ' � ' � Lar�ct�, 1��1�,1 ��:;�7 <br /> T�i: c�s�2� 4 r�-2r3� <br /> Jane Wilson ��/1r ''- 1 <br /> 325 So. Brown Rd . <br /> Orono, Minn . <br /> Jab Site; Above Address <br /> On 4/27/94 percolation tests and soil borings were done an t�Re abave <br /> lot and it was determine that a mound system would be neede�.� to <br /> replace the present trench drainfield system. <br /> However the City of Orono Inspector ( Mr. Steve Wickman) t��lt <br /> the proposed mound system would be located over one end of k '�:� old <br /> drainfield . Therefore he suggested the the mound system sh.�j: ! d be moved <br /> down the hillside an order to avoid the old drainfield ��r�a . <br /> The soil borings (S .B .# 3 ,5 & 6) indicated mottled soil at r�;e <br /> following levels; <br /> S .B.#-3---18 inches <br /> S .B .#-5--- 20 inches <br /> S .B.#-6---28 inches <br /> * Mottled soil is consider the high seasonal saturated conditions <br /> that exist during tYie wet seasons . The City of Orono rc��,uirt:�:-� <br /> that the minnimum depth to mottled soil be at 48 inches bef�;r� <br /> a trench drainfield can be installed . <br /> Therefore with the above information (mottled soil lev�ls ) tt��e <br /> only type of system that can be installed in this area is a <br /> pressurized mound system and still camply with tl�e curr�nt :odes . <br /> The size of mound needed for a 4 bedroom home( based on G00 yuI/day <br /> daily water useage and a perc . rate of 22 . 1 min/in . the sizir�=:_, <br /> factors )would be the following size; <br /> Overall size--3785 sq . ft . ( 83 ft . long by 45 .6 £t .wi��{:: ) <br /> Upslope length--76 ft . <br /> Dowr.slope length--89 ft . <br /> Width--45 .6 ft . <br /> Rock bed size--550 sq .ft. ( 55 ft . long and 10 ft .wid�) ' <br /> Amount of materials needed; <br /> Sand---240 yds . 336 tons Ave .depth--1 .9 ft . <br /> Rock--21 yds . 30 tons : " " --1 .0 ft . <br /> Sandy --50 yds . �� "--1 .0 ft . <br /> Topsoil--105 yds '� ��---9 inches . <br /> The above amounts could vary by plus or minus 10 /. , <br /> This mound must be pressurized therefore a pump tank and pur:,.� is n��:�dec: <br /> Size of pump-- 40 g.p.m ( must overcome at l+�astll ft . head press . � <br /> Size of pump tank--1000 gallon <br /> Pumping Rate 162 gal/cycle(4 cycles/day) <br /> An alarm system must be installed in the house to indir_ate ��zhmp <br /> failure , this mu-st be both asound and a light alar�n sy�tem. <br /> needed <br /> Size of septic tanks �eee��d; --Two-1000 r.�allan s�-:� i_ed tanlcs . <br /> This site should be roped off to prevent ccnstrucc. ion r.raffi � from <br /> compacting the soil , this should be done by the cr;ntracs;or. <br /> .�.'�� -�.. �_. fV':�,V�2�..•��'�,ti <br /> %,) � � <br /> , � . � ,f, /�' � / -. ; i� „ �..:: :��.: <br /> f �,�.,.. I�n..�, u��,((j�� �l'-�1 /l//��rf, x��y� J' •� ; ,i <br />