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. , , ' ` � � � <br /> � � � �� <br /> Koch ' s Soil Testing �;���� <br /> Box 81 �� <br /> • ,- ( � oretto, Minn., 55357 <br /> � ✓ <br /> � � /� � � . <br /> � ��� � <br /> � � � a <br /> � �. � �� � <br /> Erv Wachman 7/24/07 <br /> 2135 Salem Ct. <br /> Orono, Mi nn. ORONO COYY � <br /> Tel 61 2-636-2089 � �, �4'�. � ( � <br /> n <br /> �Qb Site; Above Address . <br /> �7,1��, ��-�� . � ,. <br /> � �� <br /> The present drainfield was determine by the City of Orno to be a <br /> failing system, therefore anther site was tested to determine what <br /> type of drainfield could be installed and still comply with the <br /> current City of Orono Codes . <br /> In the area that was tested the average percolation rate was 14 . 5 min/in. <br /> and the depth to mottled soil was at 24-25 inches under the proposed <br /> rock bed area and at 16 inches under the proposed downslope area. <br /> * Mottled soil is consider the restrictive layer that exist and is <br /> an indication of high seasonal water table that exist during the <br /> wet seasons . <br /> The City of Orono Codes require that mottled soil must be at 48 inches <br /> or deeper before a trench drainfield can be installed. Therefore <br /> witrh the above mottled soiJ,•'levels the only type of drainfield that <br /> can be installed is an abo'�e ground pressurized mound system and <br /> still comply with the current codes. <br /> . • <br /> The size.�of mound system needed for a 4 bedr000m home would be <br /> the following size; <br /> Sizing Factors; Daily Water Usage; 600 gal/day <br /> `'��rc Rate range 31 -45 min/in ( Loam Soil Sizing Factors ) <br /> Land Slope; ; 10 � ORONOCOPY <br /> • Overall Size; ; 3375 sq. ft. <br /> Upslope Length---68 ft. <br /> Downslope Length--- 82 ft. <br /> � Width--46 ft. ( Upslope--9 ft. , Rock--10 ft . & Downslope--27 ft. <br /> * Absorption Width--24 ft. ) <br /> Rock Bed Size--500 sq. ft. ( Length-�m"ft: .Width--10 ft . ) <br /> Amount of materi�Is needed; <br /> Sand--180 yds . , 252 �= -ta�s Ave. Depth--1 . 5 ft <br /> Rock--19 yds . , <br /> 27 tons " " --1 . 0 ft. <br /> Sandy Loam--45 yds . <br /> " "--1 . Oft . <br /> Topsoil---140 yds . " " 9-12 inches <br /> The above amounts could v��V��1,R$ON�lus or minus . <br /> U <br /> SEPTIC . R N& � IE <br /> �. . p.�4N0 COPY �NSP TO <br /> ' DAT �^ � PERMIT Nt� <br /> ' APAN��3a!'��Mt�ly'�''' <br /> ,��aa��cM�r��s rac�r�p <br /> Robert A. Koch �r�������t��a�t7 - A Cert . � 193/ 1929 <br /> These oon+p�es�wli b��iiiit�. i��erit�tla�i`��do�N ' <br /> . ia ftl!�anpli�rca'+11�1i�il nppticabt��+tk Mnd a�oning cudo, . <br /> Reqult+pa�antsiactudin�it�ms aot specitte�lty i�ot«!i�Nrawriqq <br /> �7�`��T Wii WTii Ax'J1t�� <br />