2015-01018 - septic - Laserfiche WebLink

Home Browse Search

. Septic System D�ign � Additional Infornnation Ptoperty Om�er: 2740 Deer Run TrBil Orono,MN Desaiption of Waste Water Treatment System This site is an e�osting property witl�an e�asting mound system that vras deemed non-cornpliarrt by S and P testing due to ladc of sand undemesit�the rodcbed.On upslope rodcbed there is oNy 12 inches aF sand and on the dovrr�slope of rocid�ed tltere is oMy 24',the rodcbed must have 36'of sand urMemeatl�both upsbpe and downsbpe af rodcbed.In order to achieve this, the system is being designed to add the amourrt of sand r�eeded. Frst alt loemy cap and topsoil wiU need to be stripped irom tl�e erdire rtwund and piled in the open area dawnslope from the syatem.At whidt point the old rodcbed and laterak are to be stripped.After this poiM it is advised to slrip B inches ofi s�d irom wxSerneath the rockbed to ensure no debris.dirt w rodc has infiltreted tlie caean washed sartd.ALL 4 comes�8 of the rodcbed t►ave been mariced v,rith stakes and elevations have been shot with a transit by using a budce#auger to get to the onginal soi{undeme�tl�the 4 oomers.AAuCh caro sF�outd be taken to ensure these 4 stakes remain in plaoe to ensure prnper placement of the new rocicbed.30 irx�es aF sand will then be added to the upslope of the rodcbed and 1 B ind�es of sand on downsbpe of rockbed�d reat af absorption araa to guarantee 36 ir�ches of sand throughout the errtire roc�ed and ab�orp6on area.Once new rodtbed and laterala have been�Iled.oontrador should use the ebsting loamy cap and topsoil to cover rtwund witl�6'of loamy cap and haul in the drec�ed arnount of new topsoil M oover mound with additana!B'of cover. This new on-site sewage U�eaMterrt system is desigr�ed for a 5 badr�oom home,Type 3 system in accordance with the MPCA Chaprtet 7080 and local ordnanoes. The soils on this siCs are fip foam and fill c�y loam.The periodica�►sattus�ed soils were located after gang to a depth of 75, 17 and 118md�es.But due to fdl soi�s this wdl bad 0 incf�es of usable soil undemeath the mound.3 feet of sand to be ir�staUed in order to provicie a 36 inch separation for the tr�atrnent o#effluent above the fill soils and periodicaNy saturated so�s. The existing 21500 galbn septic tanks and e�osting 1250 gaflon punp tank w�l be reused.The P��PP�Y and switc�es m�be bcated outside tl�e manhole and punping d�amber in a ureather proof endosure.A waming device must alao be installed with audioJvisual alerts.The supply line m�hanre drain badc to the p�nping diamber- From tl�e pump tank sewage w71 be pumped approximate�r 250 feet to tlte mound.There will be 3-Y pipes each 3 feet apart inside the 10'by 62.5'rockbed.The mow�d w�ll have a t�al foo�print of 58'by 109'wittt 7 peroeM slope undemeath it. All tartk manholes should be brouptrt to grade upon oanple�On af tardc insta�ation,inspection pons far the d�tributlon bo�oes altotdd�so be at grade upon canpletion. f�M S�IG��LiV)�W1C�P��aai��'�I.7V�T7LVT�fIV� OGri.Call Y x�' k��