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<br /> S � rh� John K. Justus
<br /> �de j Hammel, Green & Abrahamson, Inc.
<br /> ad�,Y o1 Architects & Engineers
<br /> ad i�jo� 1201 Harmon Place
<br /> �$�9va�e Minneapolis, Minnesota 55403
<br /> 3. � rF Re : Septic SystPm Proposal, Spring Hill Center
<br /> � N
<br /> � es �9r� `bro Dear Mr. Justus:
<br /> �Q � of t
<br /> Mote� A o�9. I have reviewed the prel�mina�m andsfindgitaincorelet�enandYunsu orted
<br /> fiy , se proposal submitted bv your f�. mP PP
<br /> �'er °Ajni as rE by soils or water use information. The followinq items are discrepant:
<br /> 0
<br /> rh.ts 1 of � °�� 1. Site proposed for neM 5,250 sq. ft. drainfield has slopes ranqinq
<br /> �h.t8 '�s d 1�4 o from 17$ to 408 with an average overall slope of 288. Orono cotle
<br /> ��bfi,����9ure le�s considers so3.ls with slopes in excess of 188 to be unsuitable for
<br /> • �d do be�� drainfield aystems in most cases. In ad�ition, the code requires that:
<br /> 4 e
<br /> �' ' �'hA s �' "On slopes, in excess of 12 percent the soil profile shall be carefully
<br /> wl�ci� e�p evaluated in the location of the proposed soil treatment area and
<br /> s�en ,�1 � ja�Ztie downsloFe to identify thP presence of layers that may cause sidehill .
<br /> co d eo 6 ,� rger S seepaqe. In no case shall a trench be loc�ted within 15 feet oE su�h
<br /> flo�tru�r rr ,��re r � a layer surfacing on the downslope. "
<br /> �o o e1
<br /> �kr�ow�8hp�9h �f ,�3 f 2. No soila documentation was aubm;ttac� for the drainfield sitinia
<br /> •o s �h�t +�s �he r ' question. Cfty files indicate two percolation tests w�ere made 1971 i
<br /> Ser t��d her S� a�k1 at the easternmost end of the proposed new drainffeld site. but logs or �
<br /> ve the rd. �he �°�` th results ef these do not appear in our files. Three soil borinqa ,
<br /> S new The xis�� were made in the area south of the proposed system in 1980 and in�icate
<br /> o� ��p ��aj j c�hstr�e ; were maa indthia8area.�y Onemsoillboringeand one �itctoaaic]e thsof �
<br /> M��rtes°�r m re ��e �h �� 8.0 ' �rere made� fn 1980 on the north (uphill) edqePof the propoaed �
<br /> Th °ta S�rtis jlo� at w� s�stem, and indicate sandy clay loam soils to a depth of 5 feet or �
<br /> 1�t�1 e�t�� 5�13' S`��rks�r near�theserborings,�ravel, rocks, and sand. No perc tests were macie �
<br /> wa forma ow b Syste M� �
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