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. • <br /> �- .� . . � ' � I . � . � . � ������ :f: . <br /> _ � � Kqch� s Soil Testing -,. <br /> • �� ' � �Robert Koch I��PCA certificate# 193/1429 ,�%� �(��� <br /> � PO Box 81 pll. ?�-�-`�7;S-2637 <br /> . '�'' Loretto,NI�. 55�57 F�.T.7b3--4`��-3161 /�� v "_ <br /> Doug Dayton � ' � - 11 /27/a6 � <br /> �00 Co. �d:'- �f 6 � . <br /> Orono, Minn. . - , <br /> � � , <br /> Job Site; Above address ' ' <br /> The present drainfield was determine k� the Cit.y of �rono to be a <br /> noncomplance system and did not meet t�'ie current codes, therefare <br /> it has to be replaced according to the City of Orono. <br /> Two sites were �ested to determine what t,ype � o•f drainfield could <br /> be i nsta; ;ed and still comply with the current City of Orono Co des. <br /> In the. Site # 1 (Primary Site ) the ave.rage percolation rate was <br /> 34 . 1 min/in, and the depth to mottled soil �level �was at 14-16 inches. <br /> While in the alternate site ( s���- Site 2 area ) the average p <br /> percolation rate was 32 . 0 min/in. and the c�epth to mottled soil <br /> was at 14-15 inches. <br /> * Mottled soil is consider the �restrictive Iayer e�t�} exist and <br /> is consider the saturated � Ia��rthat occurs during. the wet seaso.ns. <br /> The City of Orono Codes state that the minnimum depth to mottled � <br /> soil must be at 48 inches� or deeper 'before a trench drainfield can ' <br /> be installed. Therefore wd�th the above mottled soil levels ( 14-16 ��nches <br /> an above ground pressurized mound. sys.tem must be installed and stil.l <br /> comply with the current codes. <br /> The size of mound system needed for a 4 bedroom home would be thhe <br /> f_ollowing size; <br /> Sizing Factors ; Uaily Water Use; ; 600 gal/day <br /> Perc. Rate Range 46-60 minJin, { Clay Loam Soil ) <br /> Land Slope; ; 4 �. <br /> �verall Size; ; 3915 sq. ft. <br /> Upslope length--83 ft. <br /> Downslope length---91 ft. <br /> Width--45 ft. { Upslope--14 ft. , Rock Bed--10 ft. & ___._ _ - <br /> Downslope-21 f�. * Absorption Width--27 ft. ) <br /> Rock Bed Size--550 sq. ft. ( Width--10 f� Length--55 ft. } <br /> Amount of materials needed ; <br /> Sand--245 yds. , 345 tons Ave Depth--2. 2 ft. <br /> Rock--21 yds. , 30 tons " " --1 . 0 ft. <br /> Sandy Loam--50 yds . " "--1 . 0 tt. <br /> Topsoil---130 yds. , " " 9-"12 i.nches <br /> The above amounts could vary by 10 � plus or minus. <br /> This mound must be pressurized therefore a pump tank and a pump <br /> must be installed. <br /> Size of pump tank; ; 1 -1000 gallon sealed tar�k <br /> Siz� of pump; ; 30 g.p.m. ( must avercomq at. least 25 ft. of head press. } <br /> * Note; Use 7/32 inch perforated hole size inarder to use a 30 g. p.m. <br /> pump <br />