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S x!'�`�yt��<��1i''���X�; � �b�°'^�;�ti ��"�"&�'�'t � d�'��&h��YM`.r'`�"+" ��`I`��.r`� } x.. ��' p ' �•, �:.� ,L M�. ' <br /> � �fF { � Q �� ..7 `�` } '� �� i� "'K-�1 TT{F r� . <br /> i d �� I *Ft y � <br /> i �j � ,...:, 3 .",'.- ,. , .q'." rc^i �; a�!• �a(•� . . $,!: <br /> �=� `�.'-.'���� . •,$ +f� � .�� b� '� y-. ��" <br /> i ' <br /> b�' � • <br /> r <br /> ���j. ::� . � . <br /> i` <br /> ' � �+o: Rod Backerud <br /> � <br /> !'=^c�s �Iichael P. Gaffron, Asst P�anning � 'Loning Administrator <br /> `;� <br /> � Uste: November 23, 1987 - <br /> t: �Gi"c <br /> � � Sltbjects Proposed Gradin at�350 Nor�h Arm Lane <br /> '' Based on the Hennepin County Soil Survey Maps, the soils at the site <br /> of your proposad grading project are c�enerally only suitable for mound-type <br /> drainfields when undisturbed. There is an extremely hiqh likelyhood of �:; <br /> � compaction aad smearing 4f cTay soils on the site with a pro�ect of this ��-`.�� <br /> maqnitude, as well as 3isruption or destruction of the natural root and :��, <br /> xorm channels and the natural internal fracture system in the topsoil. Tha <br /> xesvltant hydraulic capabilities fn relation to suitability for aeptic <br /> � � systems will likely be much poorer, and less predictable. For thesA <br /> reasons, septic systems are generally not allowed on disturbed soils. This <br /> is common knowZedge throughout the on-site sewage treatment industry and <br /> � was not an issue in your current dre�gzng/spoil disposal application until <br /> � ;- a potential buyez of the property rec�uested subdivision information. <br /> .t <br /> ,; ;;� <br /> `;� <br /> �� <br /> : ':; <br /> �. <br /> �.� - <br /> � � � � <br /> �i� <br /> �9 <br /> °*l. <br /> •.� 'I <br /> +k' p' -. . . . <br /> I <br /> :%� <br /> � <br /> ���I � � � . Jr^ . <br /> �� �fF e <br /> :T ; <br /> .�� . . � '' � X ��f � �� <br /> � � , . <br /> k A . <br /> � 6 <br /> � � ' p ry�� � � ����f i� �I� • <br /> k <br /> ��� . . . � . . � t. ; , ' . . �'. <br /> U�i' <br /> , . ' ' � y . �' ' . - . . . . �' z+'�'i <br /> � '� . ' � ^ • ., . . . . . <br /> ,y� {ldV' <br /> .i y� . .� . . ��; <br /> �� 4 . <br /> � � � <br /> ; G. <br /> �'� . � � � .. � . pa�e�.� <br /> � � �:., s, ,� : . .� . . .� ,.�'.. � :�r�.�!",r`;�`"�,�... <br /> �� ,r: <br /> a�i <br /> � <br /> 1 <br /> �5 <br /> 1 <br /> Y„• <br />