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October �'.�1 1�+�?�� <br /> Re: Soi! Boreings; Pe;ccl�ation Te;ts, System L',cs�g;� <br /> We were retained bY P.nderson Lin;iquist i !o��al builciers ) to provide criteria for the design and <br /> installation of an nn-site se�tiane �ystFam f�,r th� �,�n�,�rt� ioc.ated at 13R0 French Creek Dr. In <br /> ' the City of Orono. <br /> The existing syst�m is functioninr but ar� addition of a bedroom is proposed for this property, <br /> thus the system has to be eniarged. <br /> This design is based or� a four bedroo�7�, ype ;�re, si��g�e f�,mily "�ome��r�it� ���aximum flow of <br /> 600 galions per day. A total of 3 scii bonrn��s and ! perc'ests were done. From these tests it <br /> was determined that a high water t:�ble exi,ts a! a depth of 60 irches below the ground surface. <br /> The soils on this si±e ar� ,Anoka loamy Sand, 6 to 12 % Slope as identified by the Hennepin <br /> County soil map. <br /> The s,�stem that exists on the p�cperty is �r. elevateC trench with 2 1000 gailon septic tanks and <br /> a 1000 galion pumo chamber. The draintie!d as listr�d by thF city is 660 square feet of trench. <br /> At some point in time the trenc;7es v�iere char.ged accordir,g to the records that are on file. It <br /> seem that the trenches wer� shortened on one end and lengthened on the other end. At present <br /> we calculate that there is 242 lineal feet of 3 foot wide trench for a total of 726 square feet of <br /> trench. <br /> After exami�ing this site it is our rQcemmendati�n that ar�other trench may be added to the <br /> existing drainfield because of the existence of enough ground water separation and the <br /> a�ailable room to do so, after some �_rtilitie�:�; have beer relocated. <br /> The drainfieid must bs� incrPasP�i ny an acl���ti�n?� 2�� ��«are f?et_ �IVe are recommending to <br /> add to the uphiil side of the exist�ng drainfield kr, addin� another lateral. Due to limited access <br /> we are recommending to �;se :� farge di�:r-ieter F ip�=> instead of rock A minimum of 90 lineal <br /> feet of 10 ir�ch SB2 pi�e must ��e added to increase� !he drain`�eld to the proper size. This lateral <br /> shall be installed uph;ll from the exis�inq lines. iAn ddditioral drop box must be installed, and the <br /> pump line that exis>ts m�.�st bP IPnnth,on��ry .qn�J f �' th� .,P�,A„ rirnn hnx first, thPr, overflow down hili <br /> to the existing drop box and c!r�in li.�,es <br /> The entire area that !s `e be used to� the dr�,�if�c;d mu�:;t be protected from any traffic to prevent <br /> any comp2ction prior to and durin�; cans_ uc?ior� �=ailura tr_: do sc, shall result in this design <br /> becominc� U��� . b.t tha+tj,m,,� tho �;t� ;n��� n��.�c� tn 4.o toc�t�r; ��air-� pf 3!1 a!te�nate site located <br /> and testin� dor� <br /> Nothing other than gray�vater (�,_,unc±�y sho��vers c!,^,) hur,�an �vaste and toilet tissue shall be <br /> disposed of into the septic systerr, �;arba:3e di�,nos<+Is are not recommended due to the <br /> addition of more solids of a fine nature that may F�:jss t!-�rough the system. Excess amounts of <br /> soap, cleaning aqents and chlorine ma� kili the bacteria needed to treat septic effluent. <br /> Additives of any kind must nat be useci, they may �ause damage to the system. <br /> It is recommended to pump and s���,vice the septic tar.ks every two to three years for maximum <br /> life of the system <br />