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HomeMy WebLinkAbout10-18-2018 Septic DesignJoseph Olson D.B.A. Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License # 810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 October 18, 2018 Ann Behning 160 Big Island Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type IClassification 11 two-bedroom Cabin in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The periodically saturated soils were located at 18-20 inches (mottled soil). Due to the periodically saturated soils, a pressurized mound system with 6 inches of rock will need to be installed to treat the septic effluent. The bottom of the treatment area must be located at least 3' above the saturated soils. This system is designed with 6 inches of rock All neighboring wells are greater than 100' from proposed treatment areas The soils at a depth of 12" have a percolation rate averaging 14 MPI, The existing shed in the mound site has skids and is on blocks. It must be moved off the septic site. The existing septic tanks must be abandoned and one new 1000 -gallon septic tank need to be installed All new tanks need to be insulated if there is less than two feet of cover over the top of the tanks. Clean outs must be installed on the end of the laterals for maintenance. Enclosed is a gallon per inch chart for a Norwesco 1000 -gallon legacy septic tank. This will be needed to set the floats in the lift station. A 1000 -gallon pumping chamber will need to be installed to lift the effluent to the treatment 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 light and sound devices; this is in case of a pump failure. A flow measurement device must be installed. Including but not limited to a water meter, event counter, running time clocks or electronically controlled dosing. Nothing other than gray water, (laundry, showers, etc) Human water and toilet tissue should be dim osed of into the septic tanks. Garbage disposals are not recommended. Additives must not be used; they may cause harmful damage to your septic system It is recommended that you pump the tank every year for I se tie tank every two years for two septic tanks. Sincerely, Joseph J. Olson N•v NIJ fJ `"`J jai' oT Co�►.�c,2 'L+',off Scale : Z I,:= -13 4th Percolation Fest Soil Boring Beach Maris Check all underground utilities Property of : ANAJ Remm iN t� 140 ROr- I�LAVV Datc jp 19" I /C- PFI (763) 498-8779 Rusty Olson's soil and percolation testing Designed Ery MOUND SVSWM DIESIGN AJ Avefage FeTCOi2ftjOn rate L2LgArday -L2C—)Sq-ft-.offxeaf,-ment area 1qe- Vie ft_ vAdth = - ft. length of bw area Side slope run 3 to I x height ft. x ft Lawn area -14 swe !r Ago $am nz agob U on SO @ftia bwa% ANUM Gear trock needed plus 20% a7cu-Yds- Coarse washed sand (I cu. Yds- Average sand depth jW *GPW am Sandy team Topsoil 6- MY& PkLS SM -(a cu- Yds- Numberef tanks 11tank /varaAa&. 20d tank pfflber capacty IMO Oineal fimt of dea- Supply pipe, ren eal feet needed i'D �Aj(-5.-10 Dis;b7buffoRP6Pe J, -dia- J-1 fineagffLe�, �I dia-Per,'Foratialls 3L, -apast Float set at L- gals_, -.t— tinvs Per day Pump cuFve _j wgn- feet head sare. PMOPEMOF ftft'. L-LP-h),t- Ph. 763498-8779 RU84F.014"ft 4md 1000 Gallon Septic Tank Height from Tank Total Bottom Gallons 1 9 2 20 3 32 4 55 5 79 6 102 7 125 8 149 9 172 10 195 11 218 12 242 13 265 14 288 15 312 16 335 17 358 18 382 19 405 20 428 21 451 22 475 23 498 24 521 25 545 26 568 27 591 28 615 29 638 30 661 31 684 32 708 33 731 34 754 35 778 36 801 37 823 38 845 39 867 40 888 41 909 42 930 43 950 44 970 45 989 46 1008 N 1000 I -Cr tic Y TX&Ak 2011 purple code Mound Design www.SegtiCResource.com !vers 15.21 Property Owner: Ann Behning Date: 10/10/2018 Site Address: 160 Big Island PID: 2311723230020 Comments: Classification II Cabin instructions: = = enter data = adjust if desired = computer calculated - DO NOT CHANGE! t) bedroom Type L� Residential System 2) 225 GPD design flow 3) No Garbage disposal or pumped to septic 4) Gal Septic tank (code minimum) 1000 Gal Septic tank (design size / LUG req'd) Tank options: none s) 1.2 GPD/ft2 mound sand loading rate contour loading rate of =req's a min 18.8 ft. long rockbed 6) 10.0 ft rockbed width 14.0 ft rockbed length 7) 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) Lend feed manifold connection 8) I !laterals 17.0 feet long 6.0 perfs / lateral 18 perfs total (1 /2 a perf means the first perf starts at the middle feed manifold) g) 1 /4"° inch perfs at feet residual head gives 0.74 gpm flow rate per perforation for this perf size Et spacing, It pipe size on line 12, max perfs/lateral = 25 , line #8 must be less > OK 10) 4.0 doses per day (4 minimum) 11) 56 gallons per dose (treatment volume) 2.00 5x i2) Z.00 inch diameter laterals must be used to meet "4x pipe volume' requirement 2.00 3x 33) 6D feet of 2.0 inch supply line leads to =gallons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) b6 gallons TOTAL pump out volume (treatment + drainback) ts) 17 Ifeet vertical lift from pump to mound laterals, leads to a: 16) 14 GPM @ 23 feet of head, Pump requirement (note: >50gpm may require an extra 3.6' of head) E7) 225 gal Dose tank (code minimum) i000 gal Dose tank (design size / LUG req'd) at gpi Leads to a 18) ###### inch swing on Demand float, or timed dosing of4.7 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow) hrs OFF test and adjust as necessary) �9) 12 inches from bottom of tank to "Pump OFF" float 20) ###### inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed 20 ###### inches from bottom of tank to "Hi Level" float, or ##### inches to "Hi Level" float if time dosed 22) ###### gallons reserve capacity (after High Level Alarm is activated) Q.45 gpd/ft2 Absorption area Soil Loading Rate, which gives a mound ratio of 2.7 (minimum) (this must match the soil boring log) desired mound ratio 1 2.7 percent site slope (0-20% range) (% downslope site slope, if different than upslope) 18 inches, or 1.5 ft. to Redox or other limiting condition (need at least 12" to be a Type 1) Treatment zone contains =inches of 0% soil credit, and F07inches of 50% soil credit. Giving a: 18 inch, or 1.5 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONSIII 26.9 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 0.0 ft. upslope and sideslope 16.9 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: 3:1 upslope ratio 10 ft. upslope berm 3:1 sideslope 11 ft. sideslope berms 3:1 downslope 20 ft. downslope berm Overall Dimensions: berm 1 10 1.5 _ 1.5 Limiting Condition 10.0 1 ft. wide by 19.0 ft. long Rock bed 40 ft. wide by 1 41 ft. long Mound footprint 4" inspection pipe r— 18" cover on top Clean sand lift Depth to Limiting Absorption Width berm 20 12" cover- on sides (6 loamy cap & 6" topsoil) 26.9 Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in bath directions. For slopes >1%, Absorption Width is measured downhill from the upslope edge of the Bed. Rock Bed: 10.0 ft. by 19.0 ft, by inches under pipe, plus 20% gives yd' or *1.4= 10 ton Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 11.1 up + 16.8 downslope +$.7 ends + 11.6 under rock = 58 y& or *1.4= 81 ton plus 20% Loamy Cap: 36 ft. by 37 ft. 6" deep, plus 20% gives 70-1 yd' or *1.4= 42 ton Topsoil: 40 ft. by 41 ft. 6" deep, plus 20% gives 37 yd' or *1.4= 52 ton I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. er Signature Rusty Olson"s Soil Et Perc 810 Company 1n/1n/an1R uGenseff nate Installer Summary 1000 gallon Septic tank (minimum) Tank options: none 1000 gallon Dose tank (minimum) at =gpi 14 GPM @ 23 ft. of head, Pump required ###### inch swing on Demand float which translates to roughly ##### inches of float tether length if time dosing is required -[4.7 4.7 minutes ON time i3 =hours OFF time ###### inches from bottom of tank to "pump ON" float, or 12 inches to "timer ON" float ###### inches from bottom of tank to "Hi Level Alarm" or ##### inches to "Hi level alarm" if time dosed 6D ft. of 2.0 inch supply line with end feed manifold connection (Tip: "top feed" manifold to control drainback) 18 inch, or 1.5 ft. Sand Lift Mound 10.0 ft. wide by 19.0 ft. long Rock bed 3 laterals 2.00 inch diameter 17.0 ft. long3.0 ft. lateral spacing 1/4" inch perfs 3.0 ft, perforation spacing No Effluent filter a alarm 3 clean out Et valve box assemblies 26.9 ft.Total sand ABSORPTION width (minimum) 0.0 ft. upslope and sideslope (sand beyond rockbed, minimum) 16.9 ft. Downslope (sand beyond rockbed, minimum) Specific slope ratios give BERM widths (topsoil beyond rockbed) of: 3:1 upslope ratio 10 ft. upslope berm 3:1 sideslope 11 ft. sideslope berms 3:1 downslope 20 ft. downslope berm 4" inspection pipe 18" cower on tap Upslope berm 10 .I & Downslope berm 20 12" cover on sides (6" loamy cap & 6" topsoil) 1.5 11 Clean sand lift 1.5 Depth to Limiting` Lrrnrting C©ndition----------- T Absorption Width Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >1%, Absorption W&Mis measured downhill from the upslope edge of the Bed Rock Bed: 7.0 Yd or "1.4= 10 ton Mound Sand: 58 yd or *1.4= 81 ton Loamy Cap: 30 yd or *1.4= 42 ton Topsoil: 37 yd or *1.4= 52 ton 6 inches under pipe calculation based on 3:1/4:1 slope from top of rockbe, 6" deep 6" deep INSPECTOR CHECKLIST - mound 16U big island ElWELL setbacks: 20' to pressure tested sewer line (5 psi for 15 min) 50' to everything 100' to dispersal area with shallow well PROPERTY LINES setback: 10' to everything Road setback: platted: 10' prop line. Metes Et bounds: out of road easement, or outer ditch. LAKE I BLUFF setback: 20' for bluff. Lakes: GD _, RD — NE Protected wetland _ Building setbacks: 10' for everything, 20' for dispersal area. WATERLINE under pressure se 10' to bed,tank Ft sewer line. (else sewer linen 12" below) Sewer line Et baffle connection (no 90's, T between 45's, slope min 1" in 8', max 2" in 8') (no depth reqs, clean out every 100', Sch 40 pipe) Septic tank and risers (water tight, insulated, proper depth, existing verified by pumping) Mfg 1000 gallons none Riser over outlet, riser over inlet or center, and 6"+ inspection pipe over any remaining baffles. No effluent filter Et alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) mfg 1000 gallons dose pump 14 gpm 23 head VERIFY PUMP CURVE 4.7 min ON 9 hr OFF El float setting drop ##### inches at gpi "DESIGNED" ##### inches approx float tether length 66.0 gat dose divided by gpi "INSTALLED" = inches float drop (field corrected LABEL pump requirements and drawdown on riser or panel Cam lock reachable from grade - 30" max. J -hook weep hole. Supply line access (no hard 90's) 20 inch supply pipe: Sch40, sloped 1/8"+, supported by 4" sch40 sleeve or compacted, and buried 6"+. splice box I control panel f electrical connections flow measurement: CT, ETM, time dosed, home water meter mound absorption area rough up mound rock dimensions 10.0 X 19.0 Sand lift depth 18 inches. (Jar test : 2" sand leaves < 1/8" silt after 30 min) Absorption Sand beyond rock 0.0 upslope 16.9 downslope Bermed topsoil beyond rockbed 10 upslope 11 sidestope 20 downslope cover depth of 12-18"+ VERIFY 3 laterals (1-2' from edge of rock) 2.00 inch pipe size (Sch40 pipe Et fittings) 3.0 ft lateral spacing e 114" inch perforations 3.0 ft perforation spacing Air inlet at end of laterals, and at top feed manifold if necessary. VERIFY clean outs (no hard 90's) 4" inspection pipe to bottom of rock, anchored VERIFY Abandon existing system - if necessary �Re-use existing tank certification monitoring plan and type well abandonment form - if necessary System Elevations benchmark (Grade elevations are existing. If a different final grade is desired it should be shown and described here.) Sewer pipe exiting house Grade Pipe septic Tank Grade inlet Tank bottom / i_► .'SIX T: f.ut.'.V'1a ----SHWT /Mound I loamy cap lateral bottom rock grade (at upslope rock bed) SHWT (at upsiope rock bed) V V I Septic Tank (if applicable) Gracie inlet Tank bottom Pump Tank Grade inlet Tank bottom Soil Observation Log www.SepticResource.com vers 12,4 Owner Information Property Owner / project: Ann Behning Date 10/10/2018 Property Address / PID: 9195 County Road 13 SE. Soil Survey Information ❑ refer to attached soil survey Parent matl's: 0 Till ❑ Outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ summit ❑ Shoulder 0 Side slope ❑ Toe slope soil survey map units: L22C2 slope 2-3 % direction- linear Soil Log #1 El Boring ❑ Pit Elevation 951.2 Depth to SHWT 18 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 1Oyr3/2 Loose Moderate Blocky 6-12 Loam `35 1Oyi-4!3 Friable Strong Block% 12-18 Clay Loam <35 I Oyr5/4 Friable Strong Blocky 18-24 Clay Loam <35 IOyr5/4 IOy4/8,1-6/1Oy Finn Strong Block <35 loose loose single grain 35-50 friable weak granular blocky >SO firm moderate prismatic platy rigid strong massive Continents: 9195 County Road 13 SE. ❑ Boring Depth (in) Texture 0-6 Topsoil 6-12 Clay Loam 12-20 Clay Loam ❑ pit fragment % <35 <35 <35 Soil Log #2 Elevation 951.2 matrix color redox color 10yr3/2 10yr4/3 10yr5/4 Depth to SHWT 20 consistence grade Loose Moderate Friable Strong Friable Strong inches shape Blocky Blocky Blocky 20-24 Clay Loam <35 10yr5/4 10y4/8,1-6/10y Firm Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive Soil Log #3 © Boring ❑ Pit Elevation 950.5 Depth to SHWT 18 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 10yr3/2 Loose Moderate Blocky 6-12 Loam <35 10yr4/3 Friable Strong Blocky 12-18 Clay Loam <35 10yr5/4 Friable Strong Blocky 18-24 Clay Loam <35 10yr5/4 10y4/8,1-6/l0y Firm Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid Strong massive 1 hereby certify this work was completed in accordance with MN 7080 and any local reqs. r . Rusty Olson's Soil & Pere. 810 Designer Signature Company License # License #810 Location or Project: Big Island John Uran Borings made by. Rusty Olson's Soil and Perc. Testing Date: 05/04197 Classification System: AASHO ; USDS-SCS_X_; Unified ; Other Auger used (check two): Hand X`, or Power , Flight , or Bucket—X_ Depth in Boring number—1 Boring number 2 Depth in Feet Surface elevation 949,9 Feet Surface elevation 951.4 0- 0-08" Dark Brown Loam 0- 0-12" Dark Brown Loam 10YR 3/2 10YR 3/2 1- ----------------------------------- 1- ----------------- --------------------- _.. 8-18" Brown Clay Loam 12-24" Brown Olay Loam 2- 10YR 4/4 2- 10YR 4/4 3- -- --- 18-40" Rusty Brown Loam - 3�- ----------------------------------------- 24-32 "Rusty Brown Clay Loam IOYR 4/4 R-5yr 5/8 G-IOyr 6/1 10YR5/4 R-5yr 5/8 G-10yr 6/1 4- -------------------------------------- 4- - -----------..-----------_ ----------- 40-48" Rusty Brown Loam 32-48" Rusty Brown Loam 5- 10YR 514 R-5yr 5/8 G-10yr 6/1 - .5- 10YR 514 R -Syr 5/8 G-10yr 6/1 6- --------------------------------------- 7- 7- 8- 8 - End of boring at _4_ feet. Standing water table. present at feet of depth, 24— hours after boring, Not present' in hole X Mottled Soil: Observed at _1.5_ feet of depth. Not present fn--hole— Comments: n hole Comments: End of boring at —4 _ feet. Standing water table: present at feet of depth, _24— hours after boring. Not present in hole _X_. Mottled Soil: Observed at _2.0_ feet of depth. Not present in hole Comments: LOC' OE On. RnR�vr License #810 Location or Project: Big Island John Uran Borings made by: Rusty Olson's Soil and Perc. Testing Date: 05/04/97 Classification System: AASHO ; USDS-SCS X ; Unified Other Auger used (check two): Hand X�, or Power^� Ffight , or Bucket X Depth in Boring number—3 I Boring number Feet Surface elevation 949,9 Depth in Feet , Surface elevation 0- 0-10" Dark Brown Loam p.. 10YR 3/2 1- -------------------------------------- 1- 10-24" Brown Sandy Loam. 2- 10YR 4/4 2- 3- - 24-30" Rusty Brown ClayLoam 3- 1 OYR 4/4 R-5yr 5/8 G-IOyr 6/1 4- ----------------------- -------------- 4- 30-42" Rusty Brown Loam 5- 10YR 5/4 R -Syr 5/8 G-10yr 6/1 5- 6- 42-48" .Rusty Brown Loamy Sand 6- 1 OYR 6/4 R -Syr 5/8 G-1Oyr 6/1 7- ------------------------------------ 7- 8- 8 - End of boring at 4_ feet. Standing water table: present at feet of depth, _24— hours after boring. Not present in hole —X—, Mottled Soil: Observed at _2.0_ feet of depth. Not present in hole Comments: End of boring at feet. Standing water table: present at _ feet of depth, _24_ hours after boring. Not present in hole —X—. Mottled Soil: Observed at feet of depth. Not present in hole Comments: PERCOLATION TEST DATA SHEET Lic.##810 Percolation test readings may by: Rusty Olggn's Perc_ on 5105197 starting at 11-.46 %m. Test hole location: Hole number 1, Date hole was prepared Depth of hole bottom 12 inches, Diameter of hole A inches. Soil data from test hole. Depth, inches Soil Texture Jim 110 1 1=1 • .U -YM ,U -1 l It Method of scratching sideway: Knife Depth of gravel in bottom of hole 2, inches Date and hour of initial water filling 2R3Op m ,5/4127 , 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 test f inches. Percolation rate "^ __ ____12 minutes per inch. Time interval, Measurement, Drop in water Percolation rate, Time minutes inches level inches minutes per inch Remarks 11:46 PREh1LL 6" 11:56 12:26 6" 2,5 12 12:31 . 1:01 6" 143 12 1:02 1:32 6" 2.43 12 Percolation rate "^ __ ____12 minutes per inch. Lic,#81 Q PERCOLATION TEST DATA SHEET Percolation test readings may by: Rusty Olson's ]!ere, on 5105197 starting at 11:46 a.m. Test hole location: 160 Morris Lsjand Park Hole number I, Date hole was prepared Depth of hole bottom U inches, Diameter of hole lZ inches. Soil data from test hole: Depth, inches Soil Texture �'- Dark Brown Aam 10 XE 312 Method of scratching sidewall: K Depth of gravel in bottom of hole Z inches . Date and hour of initial water filling 2:34p,m, 514/97 , depth of initial water filling JZ inches above hole bottom. Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Autg atic siphon Maximum water depth above hole bottom during test ¢ inches. interval, Measurement, Drop in water Percolation. rate, Timenutes tTime inches level inches minutes per inch Remarks 11:46EFILL 6" 11:57 12:27 6" 1.5 20 12;30 1:00 6" 1.5 20 1:03 1:33 6" 1.5 20 Percolation rate "-20- - minutes per inch.. PERCOLATION TEST DATA SHEET Lic.#810 Percolation test readings may by: gusty alson's Perc. on M5/92 starting at 11s4fia-m, Test hole location: 160 Morris Island Park Hole number J-, Date hole was prepared Depth of hole bottom U inches, Diameter of hole f, inches. Soil data from test hole: Depth, inches Soil Texture a�' Dark Brown i am 10 Vit 3/2 11�12"Brown SandjLLoam 10 YR 414 Method of scratching sidewall: lift Depth of gravel in bottom of hole 2, inches Date and hour of initial water filling 2r301p.m. , X14/97 , 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 fours Automatic cjl}hon Maximum water depth above hole bottom during test ( inches, Percolation rate "-I I minutes per inch. Time interval, Measurement, Drop in water Percolation rate, Time minutes inches level, incites minutes per inch Remarks 11:46 PREFILL r 11;58 12:28 6" 2.68 11 Ei2:29 12:59 6" 2.68 : 11 1.04 1:34 6" 2.68 11 Percolation rate "-I I minutes per inch.