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� <br /> �� , Koch's �oil Testing <br /> , P.O. Box 81 <br /> Loretto, MN 55357 6/14/�9 <br /> TeL (612) 479-2637 <br /> Lucia P�orrison ++�� �� <br /> ( C��r�; �rb� riel ' s Client � �' `='� �� � <br /> ) �� � <br /> �.� <br /> Crono, Minn. �:°;� .`, �. , ' <br /> � � . - .rt. .�.x <br /> Job :�ite; r��orthti�est �>>ater of �_�outhwe�t �� ater of :>ection 2,'rownship 117, <br /> i?��n�e 23, Hennipen �;�unty, Uron��, I��2inn. <br /> T�ie �ver�qe nercol�,tion r��te in t11e pri:n��r�; site w�s 4C. G min/in. and. <br /> the de�th to mo�ttled soil w�s at 2 l�t . 1C' inchEs to 3 ft . ? incltes. <br /> `.ihile in tlte alterrt� te site tl�e ��ver�ge ;�erc�l<� ti.on r��te �;��s �32. 2 min/in. <br /> �nd the �?e�tl; to m�tt 1ed soil was at 3 ft. 4 1rtCI1P3 to 3 ft. � incli�s. <br /> * Note mottlPd soil is consi�3�r tlie I11�I1 se�s��n�l �i�t_er t�l�l� �nd is � <br /> in��icator of s�t�zrnted soil conc�.itions. 'rilis soil ocrurs as red and <br /> �r�y c�lors in thE soil -�rofile, eveu ttlo tll�t this soil re�cts with <br /> 11y�rocloric acid indic�tin� t}ie presence nf calcium r_rrbon�tc, ; it is <br /> the:opinio�h of tt�.e City Insnect�r ( T�i�e G�ffron ) th��t this qa�ay color <br /> is the tr�ze w�tsr tahle level. <br /> Tl�e City of Urono On-Site Sewage Tre�tmerit Codes rF�uires tltat tll�t <br /> the minnimum depili to mottled soil b� at 4 ft. or deeTer before a st�ndard <br /> drainfield c�n be ir�stalled. 'rllerefore ;�;itll tlle above inform��tion ( ��erc <br /> rates and mottled soil levels i tl.le ��rt.l_y t�Tpe of system tl,at can be <br /> inst�lled is a pr��es�arized mound system in either tlle prim�� r�r or the <br /> altern�te sites. <br /> �Phe size of mound neecied for a 3 bedroo-n home ( h�sec�on 45C': g��llons/day <br /> daily water useage ��nd a perr_ rate _`of �G. 6 minf in• ta�� the sizing factc�rs ) <br /> wo�ild bP 81 ft. lonq by 39 ft. wide (3159 sq. ft. ) overall size, �nd <br /> a rock l_ayer oi 10 ft. wide by 41 ft. long (411; sq. ft. ) is required. <br /> * aee the enclosed mound design dat? for tl,e specirications .f �,r tlle <br /> �rox�a:ed mound system. <br /> �'his mound �ust be z�ressurized, t��erefore a purnn tank ( 1C0�� g�llon ) <br /> and a r�unt� ( 1/3 h.p. - 35 g.p.m. -r�um��iri� rate--14� g�llon/cycle �nd <br /> ��t least 4 cycles/d��y ; would be required. f+n al�rR� system ( both � <br /> sound �nd a liqht alarm ) m�zst be inst� lled in the house to indiczte <br /> � potenti�l ,»imp fail�,re . * See tlle enclosed pum� tan�: design for tlle <br /> det�ils. <br /> l` 11 tr�ff ic must be kept off bottl �rPas tc� avoid corn��ction of tl�e soil <br /> and nzining the site, tl�erE�fore botll sites sho>>ld be roped off by tlle <br /> ewner or tlle builder. <br /> * Note clean coarse wash srnd shoulc� be �zsed in this mo�ind, t!ieref�re <br /> ttlis ��and �hould be cllec'.red out by ttle local inspector to make sure <br /> it meets t11e sPecifications. <br /> .3ite �.�valuator <br /> ( � ` <br /> `,��Q�.k���� �� ("d:+ �%� I <br /> t�obert I' . !:oCh <br /> Robert Koch MPCA CertifiF�d <br />