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Home My WebLink Aboutseptic design-2005 . � �o � � `� � �rF `-�'`' � _ �� .�� , Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License #810 11481 Riverview Rd. NE, Haaover, MN 55341 (763) 498-8779 faz (763) 498-8290 November 03,2005 Bohland Development Proposed Lot 1,Block 2 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 sepric site are chosen this design can be completed. The seasonally saturated soils were located at 18"-34"(mottled soil). Due to the seasonally saturated soils, a pressurized Mound System will need to be installed to treat sepric ef�luent. The bottom of the treatment area must be located at least 3'above the saturated 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 ef�luent to the treahnent 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 equipment off of the proposed treatment areas before and after 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 areas proposed for the On-Site Sewage Treatment systems occurs. Nothing other than gray water,(laundry,showers,ect.)human water&toilet tissue should be disposed of into the septic 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 year for 1 tank,every two years for two tanks. Sincerely, Joseph J.Olson • _"�� .,, . � 3 o l i .. �; A � • A -� . x s «� � � w � � �� K � K O G � � G � W . f+ w d ' w � � �� w � � - ` � � • �� • .K� � o � � � $. . . o� as g o g �� .� . _ W A '' =A s r �1= , � �� a � • �, ; �'" ' �� Y � � - � �� a . - O # 3 . � �t .� K � ' R' {w � � � f s t ' �� ' _ w � .r _ � � � �� • -o _[ YS• k '�' � . O � Yr � y � � � c�A- � Q � t _q i �': � ' � r s � --�— - - � s � � ~ � \ � � \ � _ „ • o�� Job#�� asMr.ro� Tw,tw�swrT Pwos�ew►r� Univers' of Minnesota Mound Design Worksheet Site A �Gn�berthan 1%Siopes a F�ow F�timated 750 9Pd(see figure A-1) a�� x 1.5(safety factor)= 0 9Pd B. SEPTIC TANK LIQUID VOLUMES �� 50 gallons(see frgure G1) Number of tanks/compartrr�ents � Effluent Filter (yes/no) Y� C-1 Septic Tank Capacily in GWona Number of Minimum C�aaty witli Capaaty wilh Bedroon�s Capaary Garb.Disp. Disp.�d Lift 2 or less ' �, . 1125 F�:>•E �� . 3 or 4 , � "'f: : 1500 � � �. � � ,�,. � 5or6 . ' ,',�� ,� 7,8or9 „' � � � > >'' -+ '��s� C, SOILS(Site @V81Uation date) 1. D�th to restricting layer= 2.1 feet 2. Depth�pencolaGon tests= 12 inches 3. Texture � 4. Soil I�rate(see F'gure D-33) 0.60 9P�� p��e 6 MPI 5. %Land Slope 10.0 % D. ROCK LAYER DIMENSiONS 1. Mu�iply average design flow(A)by 0.83 to obtain requi�ed area ofi rodc�ayer:Item A x 0.83= 750 gpd x 0.83 fl�/gpd= � � 2, Detertnine rack layer width =0.63 ft"Igpd x Linear Loading Rate(LLR)(see LLR chart 0.83 ft�/gpd x 12.00 = 10.0 ft LLR Chart Pe�ic Rate I-LR <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. Multiply rodc area by rodc depth to get cubic feet of rodc 630.0 X 1.0 ft= 630.0 ft' 2. Divide ft3 by 27 ft3/yd3 to get cubic yards 630.0 ft3 / 27 = 23.3 yd3 3. Multiply cubic yards by 1.4 to get weight of rodc in tons; 23.3 yd3 X 1.4 tontyd' = 32.7 tons Page 1 of 5 . F. ABSORPTION WIDTH Absorption ratlo: �- 2 � 1. Abso�ption width equals absaption rafro Umes rodc layer width 2.pp x 10.0 ft = 20.0 ft G. MOUND SLOPE WIDTH 8�LENGTH(Greater fhan 1%) 1. Downsiope absorption width=absorption width minus rodc layer width 20.0 fcet - 10.0 feet= 10.0 ft 2. Calculate mound size UPSLOPE a.Depth of dean sand at upslope edge of rodc laye�=3 feet minus distance to restricting layer(C1) 3.0 ft - 2.1 ft= 1.0 ft b.Mound height at the upsl�e edge of rodc layer=depth of dean sand for separation(G2a) at upslope edge pius depth of rodc layer(1 foot)to depth of cover(1 foot) � ft+1ft+1 ft= 3.0 ft c.Upslope berm multiplier based on land slope(see 6gure D-34) Selected be�m muldplier: 2.86 d.Upslope width=berm multiplier(G2c)Gmes upslope mound height(G2b): 2.86 x 3.0 ft = 9.0 ft DOWNSLOPE e.Drop in elevation=rock layer width(D2)6mes perCent landslope(C5)/100 10.0 ft x 10.0 % /100= 1.0 ft f.Dawnslope mound height=depth ot dean s�d for siope di�erence(G2e) at do�wnslope rock edge plus the mound height at the upsiope edge of rock layer(2b) 1.0 ft + 3.0 ft= 4.0 ft g.Downslope bemi multiplier based on percent land slope(see F'gur�D-34 Selected berm mul�plie�: 4.29 3-1 slope h.Downslope width=downslope multiplier(G2g)GmeS downslope mound he�ght(G2� 42g x 4.0 = 17.2 ft i.Select greater of G1 and G2h as the�wnslope width 18.0 ft j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus do�mslope width(G2i) 9.0 ft+ 10.0 ft+ 18.0 ft= 37.0 ft k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)plus upslope width(G2d) 9.0 ft + 63.0 ft+ 9.0 ft= 81.0 ft Final Dimensions slope>1%) 37.0 ft x 61.0 ft I hereby certify that all work has been c�mpleted in a�ordance with all applicable ordin�ces,rule.s&laws. _ --- (signature) 810(license#) 1113I2005(date) Page 2 of 5 ' a� Job#� T.�...t.�.� Preoo�e...r Universit of Minnesota Mound Design Worksheet Site B Greater than 1%Slopes A FLOW Estimated 750 9Pd(see figure A-1) or rr�asu►ed x 1.5(safety factor)= U 9Pd B. SEPTIC TANK LIQUID VOLUMES ��k� �p gallons(see figure G1) Nurt�er of t�kslcompartments � Effluent Flter (yesJno) yes C-1 Septic Tank Capac�j►�Q�allons Number o� Minimum Capacity with Capacity with Bedrooms Capaaty Garb.Disp. Disp.and lift 2 a less � 11 5 :�� ;` 3or4 �,, �� Yiaz �k3 � s �� > ,, 5or6 ` ° `` # T �4 � 7,80f9 �:. ��.; i �� f s� .. �. .S�IL$�$it@ BV9�Uet1011 defe� 1. Dep4h to restric�ing laya= 1.5 feet 2. Deplh d percolation tests= 12 inches 3. Texture � 4. Sal bading rate(see Fgure Q33) 0.60 9P�� p�p�� 6 MPI 5. %Land Sbpe 11.0 J6 D. ROCK LAYER DIMENSIONS 1, t�uitiply average design flow(A)by 0.83 to obtain required�ea of rodc layer.Item A x 0.83= 750 gpd x 0.83 ft2/gpd= 630 ft2 2. Detertnine rodc layer width =0.83 ft`lgpd x Linear Loading Rate(LLR)(see LlR chaR 0.83 ft�/�d x 12.00 = 10.0 ft LLR Chart Pertc Rate LlR <120 MPI <=12 >=120 MPI <� 3. Length of rock layer=area divided by width= 630.0 ft� / 10.0 feet= 63.0 ft E. ROCK VOLUME 1. Multiply rock area by rodc depth to get cubic fcet of rock 630.0 X 1.0 ft= 630.0 ft 2. Divide ft3 by 27 ft31yd3 to�t cubic yards 630.0 ft3 ! 27 = 23.3 yd3 3. Muftiply cubic yards by 1.4 to get weight of rodc in tons; 23.3 yd3 X 1.4 tontyd3 = 32.7 tons Page 1 of 5 F. ABSORPT�1 WIDTH Absorpti�on ratlo: 2 1. Absorption width equals a6sorption raGo times rock layer width Site B 2.00 x 10.0 ft = 20.0 ft G. MOUND SLOPE WIDTH b I.ENGTH(Greater than 176) 1, Downslope absorption width=absorption width minus rodc layer width yp,p f� - 10.0 feet= 10.0 ft 2. Calculate mound size UPSLOPE a.Depth a�dean s�d at upslope edge of rodc layer=3 feet minus distance to restricting layer(C1) 3.0 ft - 1.5 ft= 1.5 ft b.Mound heigM at the upslope edge of rodc layer=dePth of clean sand for separation(G2a) �upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) 1.5 ft+1ft+1 ft= 3.5 ft c.Upslope berm muitipli�based on I�d slope(see figure D-34) Seleded berm multiplier: 2.78 d.Upslope width=berm mut�plier(G2c)times upslope mound height(G2b): 2,75 x 3.5 ft = 10.0 ft DOWNSLOPE e.Drop in elevation=rock layer w�dth(D2)times percent landslope(C5)1100 10.0 R x 11.0 % /100= 1.1 ft f.Downslape mound he�ht=depth aF dean sand for sbpe difference(G2e) at downsk�pe rock edge plus the maind haght at the upslope edge of rodc tayer(2b) �,� � + 3.5 ft= 4.6 ft g.DoYmslope bertn multiplier based on percent land slope(see F'rgwe D,�4 Seleded b�m multiplier: 4.48 h.Downslope width=downslope mul�pl'�er(G2g)times downslope mound height(G2� 4.48 x 4.6 = 20.7 ft i.Select greater of G1 and G2h as the downslope width 21.0 ft j.Total mound width is the sum of upslope(G2d)width plus rodc layer width(02j plus downslope width(G2i) 10.0 ft+ 10.0 ft+ 21.0 ft= 41.0 ft k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)plus upslope width(G2d) 10.0 ft + 63.0 ft+ 10.0 ft= 83.0 ft Final Dirnensions slope>1%) 41.0 ft x 83.0 ft I hereby_{�tify that all worlc has been oompleted in accordance with all applicable ordinances,rules&laws. .�'�-------_--.- (signatu�e) 810(license#) 111312005(date) r' Page 2 of 5 University of Minnesota Pressure Distribution System Design - 10/25/04 A9 boxed rodanQbs must be ente�ed,dhe resf w�l be cal�lated. O� s�wwe 1. Seled number of perforated laterals: 0 T"'�"""' rwoMewr 2. Select perforation spaang= �ft <:a-. tila�fahr�. 3. Sinoe perforafions should not be plaoad doser that 1 foot to _ "'"""" the edge of the rodc layer(see diagram).subtrad 2 feet from C�'--'�"1'�"" � �1C�OC�(�B�P@��@ fl ��•or....�k 63 -2ft= 61 ft ,�.�f.:�.,,,.,.�.;--��+- !\rl��.ry{I.R•_S• 4. Determine the number of spaces between perforations. Divide the length(3)by peAoration spaang(2)and round down to nearest whole number. Perforation spacing= 61 ft/ 3 ft= 20 5. Selecc;t perforation size 1/4 inch 6. Number oT perforations is equai to w�e plus N�e number of peAoration spaces(4). •Chedc fpure C 4 lo assure Ihe number of perinrations per late�al guaren[�ees <10%disChe�e varialron. 20 spaoes+1 = 21 perforations/lateral � wn Numbsr of 1M nch -5 um Number of 3l16 inch pe Iaberal tp uararKee<10%diacha variatlon labral to ranbee<10M.dfsc variation P PerforaUon Spaang Pipe D�nellsr Spacing Pipe Diameter ft 1 inch 1.25 inch 1.5 inc� 2.0 inch feN 1 inch 1.25 inch 1.5 inch 2.0 inch y2,.��5, 8 �14g_� 18 28 2.5 12 1p9t 25 39 ."�l7W�Y.5 . � f33�`?,:` , s� , .��.� _?} i�.'�` �,'�'�.. ,'�¢ f Y.:;�," �'�. 3.3 7 12 16 25 3.3 10 17 23 µ n 36 �' ." < 7 ;#�.}�� `��<'�F.." ,.29 ;';s+t , tOj�'; i8 r�.� ' 93 . ,, 5A � 6 10 14 22 5 � 9 15 20 31 7. A.T�al number of pe�forations=perforations per lateral(5)times number of laterals(1). 21 perfs/lat x 3 laterals= 63 perforatlons B.Calaila�e tF�e square footage per perforation. Recommended value is 6-10 ac�fllpeA.Does not apply to at-grades. 1. Rodc bed area=rodc width(ft)x rodc length(ft) 10 ft x 63 ft= 630 f'� 2. Square foot per perforation=Rodc Bed Area/number of perfs(6) 630.0 ft� / 63 perts = 10.0 ft�/perf 8. Detertniae required flow rate by mulGpiying tF�e tMal number �Perfo��$(�)bY�P�Perforations see figure E�) 63 perfs x 0.74 gpm/perfs= 46.6 gpm E-6 Perforation D M Head erforations diameter feet inches 3/16 7/32 1/4 1 0.42 0.56 0.74 2° 0.�' Q� 1.04 5 0.94 1.26 1.65 a. use t.o rooc ror aingbdamy nomes. b.Use 2.0 feet for eke , ;:�j"' 9. Detertnine Minimum Pipe Sine - ' . . `••�,^ A. Manifoid on E�. If laterals are connected to hea�der Pipe ' , _.. .. . J , . ... .. ... as shown in Figure E-1�tO Se�RII�INTIUITI I�U�16�J Iate�al �W�E-1:MaYUk!looal�d al End o1 Nslwn diameter;enter figure E1t or E-5 with perforation spacing and number of peAorations per lateral.Select minimum diameter for perforated laterals= 2.0 inches _.____ __ B. Ce�Manifold. If perforated lateral system is attached to „�Fo��".,�:.�° - • . I manifold p�e near the ceMer,like Figure E-2,peAorated lateral length(3) _..; . and number of perforations per lateral(5)wiN be approximately _ one half of that in step A. Using these values,select , minimum diameter for perforated lateral= 1.5 inches • ^Z._ � I hereby certify that I have completed this work in accoMance with all applicable ordinances,rules and laws. � (sgnature) 810 (lioense#) 11/03/05 (date) Los�s of Soil Borins�s License#810 Location or Project: Porposed lot 1, Block 2 Mackinnon Hill Borings made by: Rusty Olson's Soil and Perc testing 70/20/2005 Classification System: AASHO ; USDS-USDS-SCS X ; Unified ; Other Auger used(check two): Hand_X_,or Power . Fiight, Bucket or Probe_X_ Boring Number_1_Surface elevation_991.7_ Mottled Soil at_2.1_feet 0"-14"Darlc brown loam 10yr3/2 H20 present at X feet 14"-18"Brown loam 10yr4/4 18"-26"Brown loam 10yr5/3 26"-30"Rusty brown loam 10yr5/4 Boring Number 2_Surface elevation_991.7._ Mottied Soil at 2.8 feet 0-14"Dark brown loam 10yr3/2 H20 present at X feet 14"-28"Brown loam 10yr4/3 28"-34"Brown loam 10yr5/3 34"-48"Rusty brown loam 10yr5/4 Boring Number_3_SurFace Elevation_987.7 Mottfed Soil at_1.5_feet 0-12"Dark brown loam 10yr3/2 H20 present at X 12"-18"Brown Ieam 10yr4/3 18"-24"Rusty brown loam 10yr5/3 24"-30"Rusty brown loam 10yr5/2 Boring Number 4_ Surface elevation_987.7_ Mottled Soil at 2.0 feet 0-12"Dark brown loam 10yr3/2 H20 present at X_ 12"-24"Brown loam 10yr4/3 24"-30"Rusty brown loam 10yr5/3 Boring Number 5_Surface elevation_986.4_ Mottled Soil at_1.5_feet 0-12"Da�ic brown loam 10yr3/2 H20 present at_X_ 12"-18"Brown loam 10yr4/3 18"-30"Rusty brown loam 10yr5/3 Boring Number 6_Surface elevation_990.2_ Mottled Soil at_2.0_feet 0-12"Dark brown loam 10yr3/2 H20 present at_X 12"-18"Brown loam 10yr4/3 18"-24"Brown loam 10yr5/3 24"-30"Rusty brown loam 10yr5/4 Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:30 A.M. On 11/01/05 Location: Proposed Lot 1, Block 2 Mackinnon Hill Hole number: 1 Date hole was prepared: 10/31/05 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 Metliod of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date and hour of initial water filling 1(�31/05 At 11:00 A.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 10:58 11:28 6" 5.5 5.4 11:35 12:05 6" 5.5 5.4 12:06 12:36 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 8:30 A.M. On 11/01/05 Location: Proposed Lot 1, Block 2 Mackinnon Hill Hole number.2 Date hole was prepared: 10/31/05 Depth of hole bottom_12"_inches, Diameter of hole 6"_in�hes. Soil data from test hole: Depth, inches Soil texture 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 1qfi1/05 At 11:00 A.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 De th Drop in H20 Perc Rate 10:59 11:29 6" 4.7 6.4 11:34 12:04 6" 4.6 6.5 12:07 12:37 6" 4.6 6.5 AVERAGE PERC. RATE 6.5 MPI Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:30 A.M. On 11/01/05 Location: Proposed Lot 1, Block 2 Mackinnon Hill Hole number.3 Date hole was prepared: 10/31/05 Depth of hole bottom_12"_inches, Diameter of hole 6"_inches. Soil data from test hole: Depth, inches Soil texture 0-12" Dar1c 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 1031/05 At 11:00 A.M. depth of initial water filling 12 inches above hole bottom. Method used to maintain at Ieast 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 11:00 11:30 6" 5.0 6.0 11:33 12:03 6" 4.8 6.2 12:08 12:38 6" 4.6 6.5 AVERAGE PERC. RATE 6.2 MPI Percolation Test Data Sheet Lic.#810 Percolation test readings made by: Rusty Olson's Perc. starting at 8:30 A.M. On 11/01/05 Location: Proposed Lot 1, Block 2 Mackinnon Hill Hole number:4 Date hole was pre�ared: 10/31/05 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 gravel in bottom of hole 2 inches: Date and hour of ini6al water filling 10/31/05 At 11:00 A.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 wafier depth above hole bottom during tests 6 inches Time ime Depth Drop in H20 ' Perc Rate 11:01 11:31 6" 5.5 5.4 11:32 12:02 6" 5.5 5.4 12:09 12:39 6" 5.5 5.4 AVERAGE PERC. RATE 5.4 MPI