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Home My WebLink Aboutseptic design-2005 . � , � �� 11�4-r.-E-) ,� t,•. �r . K��r� � Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License #810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 faz (763) 498-8290 November 03,2005 Bohland Development Proposed Lot 1,Biock 1 Mackinnon Hill Orono,Hennepin.County This on-site Sewage Treatment System is partially designed for a Type 1,five-bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. Once the house size,location and septic site are chosen this design can be completed. The seasonally saturated soils were located at 18"-32"(mottled soil). Due to the seasonally saturated soils, a pressurized Mound System will ne�d to be installed to treat sepric effluen� The bottom of the treatment area must be located at least 3'above the sahuated soils. The soils at a depth of 12"have a percolation rate averaging 6 MPI. AII absorption areas are at a minimum of 20 feet from the lot lines and 75 feet from wetlands. A pumping chamber will need to be installed to lift the ei�luent to the trealment area. The power supply and switches must be located outside the manhole and pumping chamber in a weatherproof enclosure. A warning device must be installed with a light and sound device;this is in case of a pump failure. Keep all heavy equipmeut off of the proposed treatment areas before and at�er construction. The treatment area must be fenced off before construction begins. This Design is not valid&the System wiil need to be relocated if failure to protect the sreas proposed for the On-Site Sewage Treatment systems occurs. Nothing o�er than gray water,(laundry,showers,ect.)human water 8c toilet tissue should be disposed of into the sepric tanks. Garbage disposals are not recommended. Additives must no be used,they may cause harmful damage to your septic system. It is recommended that you pump the septic tank every yeaz for 1 tank,every two years for two tanks. Sincerely, Joseph J.Olson ,3g't N n' 38 � NS �� +� ' . � ^� � � w �� _ w � w y . � • - � . +� . u .o - � � Y� 4� ' � �� t � � h � _~----... 1, �,��*- -�.,,�Y `,,. � A�K�'�►' A�� i� ? � �_� : �� x � � � � � �� t �� "�"� � - x , � -� �� , -�os � = � �� ` � ��= - . � � � � � � . � � � . d y � , � � � Job#� Tw�tw�rr��r+T P�eoo�ewM Univers of Minnesota Mound Design Worksheet Site A Greate�than 1�6 Slopes A FLOW E.stimated 750 9pd(see figure A-1) or measu�ed x 1.5(safety factor)= 0 gpd B. SEPTIC TANK LIQUID VOLUMES Sepbc taMc c�adty 225p gallons(see figure G1) Numbe�of tanks/oompartments 0 Effluent F�ter (Yeshro) Yes C-18epfk Tank C�pacily in GWons Nurt�er a� Minimum Capacity with Capacity with Bedrooms Capaaty Garb.Disp. Disp.2nd Lift or less i f�: 125 x' 3 or 4 �� 1500 5 or 6 �'`;�� 2250 1�" � 7,8 or 9 ��,arr � � ��"= 3000 C. SOILS(S�e evaluetion data) 1. Depth to reshic�ng layer- 2.0 feet 2. Deptlt d per�d2�ion tests= 12 inches 3. Texd�re bam 4. So�loec�ng rate(sae F'rgure D-33) 0.60 gpd�1t� Peroolatlon rate 6 MPI 5. 96 t.and Sbpe 3.0 % D. ROCK LAYER D�IIENSIONS 1. Muitiply average desiyn flow(A)by 0.83 to obtain required azea of rodc iay�:Item A x 0.83= 750 gpd x 0.83 ft�lgpd= 630 ft 2. Detem�ne rodc lay�width =0.83 ft%gpd x Line�Loading Rate(LLR)(see LLR c��t 0.83 ft�/gpd x 12.00 = 10.0 ft LLR Chut Perk Rate LLR <120 MPI <=12 >=1Z0 MPI <� 3. Length of rock layer=area divided by width= 630.0 ft� / 10.0 feet= 63.0 ft E. ROCK VOLUME 1. Mul6ply rodc area by rock depth to get cubic feet of rodc 630.0 X 1.0 ft= 630.0 ft3 2. Divide ft3 by 27 ft31yd3 to get cubic yards 630.0 ft3 I 27 = 23.3 yd3 3. Multiply cubic yards by 1.4 to get weight of rock in tons; 23.3 yd3 X 1.4 tonlyd3 = 32.7 tons Page 1 of 5 F. ABSORPTION WIDTH Absorptlon ratio: 2 � 1. Abso�tion width equals absapfion ratio ames rock layer width Site A 2.00 x 10.0 ft = 20.0 ft G. MOUND SLOPE WIDTN�LENGTH(Gt�er tlan 1X) 1. Downslope absorption widTh=absaption width minus rodc layer width 20A feet - 10.0 feet= 10.0 ft 2. Ca�ulate mound size UPSLOPE a.Depth d clean sand at upsbpe edge of rodc tayer=3 feet minus dist�ce to restricting layer(C1) 3.0 ft - 2.0 ft= 1.0 ft b.Mound height�the upslope edge ai rock layer=depth of dean sand for separation(G2a) at upslope edge plus depth af rodc layer(1 foot)to depth ai oover(1 fo�) 1 ft+1ft+1 ft= 3.0 1t c.Upslope berm multiplier based on land slope(see figu�D-34) Sele�berm mut�plier. 3.57 d.Upslope width=berm mul�plie�(G2c)timas upslope mamd height(G2b): 3.57 x 3.0 ft = 10.0 ft DOWNSLOPE e.Drop in elevation=rodc layer width(D2)times p�oer�t landsiope(C5)/100 10.0 R x 3.0 % l100= 0.3 ft t.Downsbpe mound h�ght=dep4h of c�an sand for siope ditfererx�e(G2e) at dowmsbpe rodc edge plus the mound heigM at the upsbpe edge of rock layer(2b) 0.3 ft + 3.0 ft= 3.3 ft g.Downsbpe be�m mul�plie.r based on pe�cent land slope(see Figure D-34 Seleded bertn mul�plier: 4.54 h.Downslope width=downslope multipliex(G2g)6mes�mslope mound heigM(G2� 4.54 x 3.3 = 15.0 ft i.Select greater of G1 and G2h as the downslope width 15.0 ft j.Total mour�d width is U�e sum of upslope(G2d)width plus rodc layer width(D2)plus downsiope width(G2i) 10.0 ft+ 10.0 ft+ 15.0 ft= 35.0 ft k.T�al rrbund length is the sum of upslope width(G2d)pius rodc layer length(D3)plus upslope width(G2d) 10.0 ft + 63.0 ft+ 10.0 ft= 83.0 ft Final Dimensions sbpe>1%) 35.0 ft x 83.0 ft I hereb c�tify that all woric has be�completed in acco�dance with all�pl�e ordinances,rules&laws. � (signature) 810(lioense#) 1113/2005(date) Page 2 of 5 s�:w,4 Job#� Twswrr�s�rT Pieos�ewM Universit of Minnesota Mound Design Worksheet S�e B Greater than 1 X Slopes A. FLOW Estimated 750 gpd(see 6gure A-1J or measured x 1.5(safety fact�)= 0 gpd B. SEPTIC TANK LIQUID VOLUMES Septic tank r�pacity 225p gallons(see figur�e G1) Nurt�er d tanks/oanparUnents 0 Eifluent Flter (Yes/no) Y� C-1 Septic Tank C�adly M Galloos Number of Minimum Capacity with Capaaty with Bed�oort�s Garb.Disp. Disp.and LiR or less .��v:, 1 �;, =:r . 3 or 4 � 1500 �� ,'. � 5 or 6 �� 2250 �4_ . 7,8 or9 .��,�a 3000 �� C. SOILS(Sife eveluatron dafa) 1. Depth to restric�i�k�yer= 2.0 fee,t 2. Depth af pe�dabon tests= 12 inches 3. Texture loam 4. Soil loa�ng r�e(sse F'gum D,?3) 0.60 �� Peroda6on raae 6 MPI 5. %Land Sbpe 4.0 % D. ROCK LAYER D�ENSIONS 1. MulGply average design flow(A)by 0.83 to ot�ain required area a�rock layer:Item A x 0.83= 750 gpd x 0.83 il�/gpd= 630 ft� 2. Determine rodc layer widih =0.83 ft`Igpd x Line�L.oading Rate(LLR)(sae LLR chart 0.83 it�/gpd x 12.00 = 10.0 ft LLR Ch�t -- Perk R�e LLR <120 MPI <=12 >=120 MPI <=6 3. Length of rodc layer=area divided by width= 630.0 ft/ 10.0 feet= 63.0 ft E. ROCK VOLUME 1. Muttiply rodc area by rock depth to get cubic feet of rodc 630.0 X 1.0 ft= 630.0 ft3 2. Divide fC�by 27 ft3lyd3 to get cubic yards 630.0 ft3 I 27 = 23.3 yd3 3. Multiply cubic yards by 1.4 to get weight of rock in tons; 23.3 yd3 X 1.4 toNyd3 = 32.7 tons Page 1 of 5 F. ABSORPTION WIDTH Absorptbn ratio: r 2 1. Absorption widtl►equals absaption ratio times rodc layer width Site B 2.00 x 10.0 ft = 20.0 ft G. MWlND SLOPE WIDTH b LENGTH(Grea�er Uu�n 1%) 1. Downslope absap6on width=absorptiion vridtli minus rodc layer width 20.0 feet - 10.0 feet= 10.0 ft 2. Cak:ulate mound siae UPSLOPE � a.Depth of dean s�d at upslope edge of rodc laye�=3 feet minus distanoe to restriding layer(C1) 3.0 ft - 2.0 ft= 1.0 ft b.Mound height at the upsbpe edge of rodc layer=depth oi dean sand for s�ration(G2a) at upslope edse dus d�tl,of rodc tayer(1 fooR�ro depfr,d cover(1 foot) 1 ft+1ft+1 ft= 3.0 ft c.Upslope berm mulaplier based on land slope(see fK,�ure D-34) Selected berm multiplier: 3.45 d.Upslope width=berm multiplie�(G2c)times upsiope mound heigh�G2b): 3.45 x 3.0 ft = 10.0 ft DOWNSLOPE e.Orop in elev�ion=rodc layer width(D2)times peroent landslope(C�/100 10.0 ft x 4.0 % /100= 0.4 ft f.Donmsbpe rtaund height=depTh d dean sand for sbpe�IFererx:e(G2e) at downslape rock edge plus the mound hei�t at the upsiope edge af nodc layer(2b) 0.4 ft + 3.0 ft= 3.4 ft g.Downsiope berm multiplier based on peroent land slope(see Figu�e U,34 Seleded berm mulGplier: 4.76 h.Downslope width=downslope mulGplier(G2g)times dovmslope mound height(G2� 4.76 x 3.4 = 16.0 ft i.S�lect greater of G1 and G2h as the downslope width 16.0 ft j.Total mound width is the sum of upsbpe(G2d)width plus roc;k laye�width(D2)plus dormslope width(G2i) 10.0 ft+ 10.0 ft+ 16.0 ft= 36.0 ft k.Total mound length is the sum of u�lope width(G2d)plus rodc layer length(D3)plus upslope width(G2d) 10.0 ft + 63.0 ft+ 10.0 ft= 83.0 ft Final Dimensions slope>196) 36.0 ft x 83.0 ft I certify that�I wak has been completed in acoordance with all applicable ordinanoes,rules&laws. (signature) 810(license#) 11/3/2005(date) Page 2 of 5 � University of Minnesota Pressure Distribution System Design -10/25/04 ns eoxed�d�pf�t must ae erMsrod,n�e reaf wrx ae caJan,�ed. Owsrte aew� 1. Seled number of perforated laterals: � T�� 2. Selecc:t perforation spacing= �3�ft (:�a4oRaf4(aFr.. 3. Since perforations should not be placed doser that 1 foot to fhe edge of the rodc layer(see diagram),subVad 2 feet from �-�� q i.f nti•k the rodc laye� 63 -2 ft= 61 ft '�;`�'�`.�;'"'"��•• 4. Determine the number of spaces belvveen perforations. Divide the length(3)by perforation spacing(2)and round down to nearest whole number. Perforation spaang= 81 ft/ 3 ft= 20 5. Seled perforation size 1/4 inch 6. Number of peAorations is equal to one plus the number of pertoration spaces(4). "Check fiq�C 4 to essure dre number of perlaabons per Jatera/guaraM�ees <10%discheige velie6o►r. 20 spaoes+1= 21 perforetionsllateral �Maximwn Nwnbsr 1/4 inch pe�foratlons �i Max�num Number 3N61t�ch perforations IaEsral to rar�se<10X dls varfadon lebarel to uara�ee<1Mfi disCha va�latfo� Perforation Spacing Pipe Dismeter Spacin9 PiPe Dlerneter ft 1 inch 1.25 i�ch 1.5 inch 2.0 inch feet 1 inch 1.25 inch 1.5 inch 2.0 inch 2.5 8 14 18 28 2.5 12 19 25 39 =34 � aet ,�.'�+ h: "1� 26 �3 'k't:�� _ ,�� ;��. ;.37. . 3.3 � 7 12 �16 25 � � �3.3 10 � 17 , 23 , , 38 � . ....A;...' �` ,.� ; �', *.:: �:��r�'", : .16 2S '- � ,: r! 10,::<� {��,4 .�" :, �w �.r:... ... 5A 6 10 .�� d 14 22 5 9 15 20 31 7. A.Total number of perforations=perforations per lateral(5)times number of laterals(1). 21 perfa/Iat x 3 Iaterals= 63 perforations B.Calailate the square foatage per perforation. Recommended value is 6-10 sqNpe�f.Do�not apply to at�ades. 1. Rodc bed area=rodc width(f�x rodc length(ft) 10 R x 63 ft= 630 ft� 2. Square per perforeU'�or�todc Bed Arealnumber o�perfs(6) 630.0 ft/ 63 perfs = 10.0 ft�/perf 8. Determine required flow rate by mulhptying the total number �P��(�)bY�P�Perforations see figure E-6) 63 perfs x 0.74 gpm/perfs= 46.6 gpm � n Head Pe rations diameter feet indres 3/16 7132 1/4 1 0.42 0.56 0.74 �° .:, a�: o:eo ,.a 5 0.94 1.26 1.65 a. use�.o roa t«�nom�. b.Uae 2.0 teet for else . , `�� , 9. Detertnine Minimum Pipe Size _ , , . `••� A. ManNold on End. tt laterela are connected to header pipe ,,. ... . as shovm in Figure E-1,to select minimum required lateral �..E-�:M�.�.a a�d�.�, . diameter,enter figure E-4 or E-5 with perforation spaang and number of perforations per lateral.Select minimum diameter for perforated laterals= 2.0 inches B. Ceober Manifold. If perforated late�al system is attac�ed to �Fei,,,,M N;� i manifold pipe near the oeMer,like Figure E-2,perforated lateral length(3) _„. . ' ; aod number of parforations per lateral(5)will be approx'anately ' I one half of that in step A. Using these valu� seled - minimum diameter fo�peAorated lateral= 1.5 inches . `'Z�- •,. ' I hereby ' that I have completed this work in acxordanoe with all applicable ordinances,rules and laws. (signature) 810 (license#) 11/03/05 (date) Losts of Soil Borins�s License#810 Location or Project: Porposed lot 1, Block 1 Mackinnon Hill Borings made by: Rusty Olson's Soil and Perc testing 10/18/2005 Classification System: AASHO ; USDS-USDS,SCS X ; Unrted ; Other Auger used(check two): Hand_X ,or Power_, Flight, Bucket or Probe_X_ Boring Number_1_Surface elevation_1054.3 Mottled Soil at_2.1_feet 0"-14"Dark brown loam 10yr3/2 H20 present at X_feet 14"-26"Brown loam 10yrM4 26"-30"Rusty brown loam 10yr5/3 Boring Number 2_Surface eleva�on_1054.5._ Mottled Soil at 2.3_feet 0-18"Dark brown loam 10yr�/2 H20 present at X feet 18"-28"Brown loam 10yr4/4 24"-36"Rusty brown loam 10yr5/3 Boring Number_3 Surface Elevation_1056.6 Mottled Soil at 2.0_feet 0-12"Dark brown loam 10yr3/2 H20 present at X 12"-18"Brown loam 10yr4/4 18"-24"Brown clay loam 10yr5/4 24"-30"Rusty brown loam 10yr5/3 Boring Number 4 Surtace elevation_1056.6 Mottled Soil at_2.6_feet 0-14"Datic brown loam 10yr3/2 H20 present at X 14"-24"Brownn loam 1 Qyr4/4 24"-32"Brown loam 10yr5/4 32"-36"Rusty brown loam 10yr6/4 Boring Number 5_Surface elevation_1053.9_ Mottled Soil at 2.0_feet 0-14"Dark brown loam 10yr312 H20 present at X 14"-24"Brown loam 10yr4/4 24"-30" Rusty brown loam 10yr5/3 Boring Number 6_Su�elevation_1056.2_ Mottled Soil at_1.5_feet 0-8"Dark brown loam 10yr3/2 H20 present at_X_ 8"-18"Brown loam 10yr4/4 18"-30"Rusty b�own clay loam 10yr5/3 Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:23 A.M. On 10/29/05 Location: Proposed Lot 1, Block 1 Mackinnon Hill Hole number.1 Date hole was prepared: 10/28/05 Depth of hole bottom_12"_inches, Diameter of hole 6"_inches. Soil data from test hole: Depth, inches Soil texture 0-12" Dark brown loam 10yr3/2 Method of scratching side wall: Knife Depth of gravet in bottom of hole 2 inches: Date and hour of initial water filling 10/28/05 At 1:00 P.M. depth of initial water filling 12 inches above hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic Siphon Maximum water depth above hole bottom during tests 6 inches Time Time Depth Drop in H20 Perc Rate 8:33 9:03 6" 4.5 6.6 9:26 9:56 6" 4.3 7.0 9:57 10:27 6" 4.2 7.1 AVERAGE PERC.RATE 6.9 MPI Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:23 A.M. On 10/29/05 Location: Proposed Lot 1, Block 1 Mackinnon Hili Hole number.2 Date hole was prepared: 10/28/05 Depth of hole bottom_12"_inches, Diameter of hole 6"_inches. Soil data from test hole: Depth, inches Soil texture 0-12" Darlc brown loam 10yr3/2 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date and hour of initial water fllling 10/28/05 At 1:00 P.M. depth of initial water filling 12 inches above hole bottom. Me�od used to maintain at least 12 inches of water depth in hole for at least 4 hours Automa6c Siphon Maximum water deptli above hole bottom during tests 6 inches Time Time Depth Drop in H20 Perc Rate � 8:34 9:04 6" 5.5 5.4 9:25 9:55 6" 5.5 5.4 9:58 10:28 6" 5.5 5.4 AVERAGE PERC. RATE 5.4 MPI Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:23 A.M. On 10/29/05 Location: Proposed Lot 1, Block 1 Mackinnon Hill Hole number.3 Date hole was prepared: 10/28l05 Depth of hole bottom_12"_inches, Diameter of hole 6"_inches. Soil data from test hole: Depth, inches Soil textu�e 0-12" Dark brown loam 10yr3/2 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date and hour of initial water filling 10/28l05 At 1:00 P.M. depth of initial water filling 12 inches above hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic Siphon Maximum water depth above hole bottom during tests 6 inches Time Time Depth Drop in H20 Perc Rate 8:35 9:05 6" 5.0 6.0 9:24 9:54 6" 4.8 6.2 9:59 10:29 6" 4.7 6.4 AVERAGE PER . RATE 6•2 MP� M Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:23 A.M. On 10/29/05 Location: Proposed Lot 1, Block 1 Mackinnon Hill Hole number:4 Date hole was prepared: 10/28/05 Depth of hole bottom_12"_inches, Diameter of hole 6"_inches. Soil data from test hole: Depth, i�� Soil texture 0-12" Darlc brown loam 10yr3/2 Method of scratching side wall: Knrfe Depth of gravel in bottom of hole 2 inches: Date and hour of initial water filling 10/28/05 At 1:00 P.M. depth of initial water filling 12 inches above hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automa�c Siphon Maximum water depth above hole bottom during tests 6 inches Time Time De th Drop in H20 Perc Rate 8:36 9:06 6" 4.7 6.4 9:23 9:53 6" 4.6 6.5 10:00 10:30 6" 4.6 6.5 AVERAGE PERC. RATE 6.5 MPI