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HomeMy WebLinkAbout10/07/2018 Septic DesignCity of Orono Septic flan Review Reviewer:(4 All work shall be done in full compliance with all applicable septic and zoning code. Joseph Olson D.B.A. Rusty Olson's--Soil and Percolation Testing 1-2250 Septic 1- 1000 Pump Joseph J. Olson--MPCA License #810 10 X 38 POdc Bed 11481 Riverview Rd. NE, Hanover, MN 55341 22 GPM Pump (763) 498-8779 Fax (763) 498-8290 23 * THD Revised October 7, 2018 ® Norton Homes 4330 Lakeview Court Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type I, Three-bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The periodically saturated soils were located at 12-18 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. The soils at a depth of 12" have a percolation rate averaging 17 MPI. A 2250 -gallon septic tank is designed for this site. All 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. Use 7/32 -inch perforations on the laterals. A Darwin 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. Keen all heavy equipment off of the proposed treatment areas before, during and after construction The area around both sites must be fenced off by the contractor, before any construction begins With proper installation and maintenance, this system should have no problem in treating septic effluent effectively. Nothing other than gray water, (laundry, showers, etc.) Human water and toilet tissue should be disposed of into the septic tanks. Iron filters cannot go into the sentie system. 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 septic tanks every two years. Sincerely, a Joseph J. Olson G M1e t? 45661 6"LB6 _ fC`l 4 j /"/ 8p OIL Y / V'x, r \ 'i1� / ` 04I / .� /,,n N to ,0 G, .C5 e 4' r f / , f — "^ 917.5_ Ae �1� "rzWb `'S� .'♦ � % 6 O `9'T�yy i)'fi 286./ �/�, a.�1� t' / / ' N�Ba �a ` a 330 y�_ �7�5t p'8 0°4 f a 175 0 ♦ O '•.' 21 o r ARD UTIO Y�EASE�ENTj-Y�E6.6G5 p // Lr, Cal 9tr.6l5 S C J r ♦93 // D 4�V / r ZO-O, t i Sf / 2011 purple code Mound Design www.SepticResource.com (vers 15,2) Property Owner: Site Address: Comments: Norton Homes 4330 Lakeview Court Primary site Date: 10/4/2018 PID: 0611723430017 instructions: = =enter data = adjust if desired = = computer calculated - DO NOT CHANGE! )) =bedroom Type Residential System 21 450 GPD design flow 3) Na Garbage disposal or pumped to septic 4) -1000 Gal Septic tank (code minimum) F20001Gat Septic tank (design size / LUG regd) Tank options: none s) GPD/ft2 mound sand loading rate contour loading rate of712-1req's a min 37.5 ft. long rockbed 1.2 e) 10.0 ft rockbed width 38.0 ft rockbed length z) 3.0 ft lateral spacing 3,0 ft perforation spacing (maximum of 3 for both) Fended manifold connection fe 8) ! 3 ]laterals 13.0 36.0 feet long perfs / lateral 39 perfs total (1 /2 a perf means the first perf starts at the middle feed manifold) 9)7/32 inch perfs at =feet residual head gives 0.56 gpm flow rate per perforation for this perf size it spacing, Er pipe size on line 12, max perfs/lateral = 30 line #8 must be less --> Ok 10) 4.0 doses per day { 4 minimum) ) f 1 113 gallons per dose (treatment volume) 2.00 5x )2) 2.00 inch diameter Laterals must be used to meet "4x pipe volume" requirement 2.00 3x )3) =feet of 2.0 Inch supply line leads to12 gallons ofdrainback volume (Tip: "top feed" manifold to control the drainback) )4) 125 gallons TOTAL pump out volume (treatment + drainback) )s) 16 feet vertical lift from pump to mound laterals, leads to a: 6,) 22 GPM C 23 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) 17) 500 gal Dose tank (code minimum) 1000 gal Dose tank (design size / LUG req'd) at aEgpi leads to a 18) =inch swing on Demand float, or timed dosing of5.7 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow)Bhrs OFF test and adjust as necessary) ie) F 12 Inches from bottom of tank to "Pump OFF" float 10) 17 inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed sit 20 linches from bottom of tank to "Hi Level' float, or 30 inches to "Hi Level" float if time dosed 22) 500 gallons reserve capacity (after High Level Alarm is activated) 23) 0.45 gpd/ft2 Absorption area Soil Loading Rate, which gives a mound ratio of2.7 (minimum) (this must match the soil boring log) desired mound ratio 2.7 24) =percent site slope (0-20% range) =(% downslope site slope, if different than upslope) 25) F12 inches, or 1.0 ft. to Redox or other limiting condition (need at least 12" to be a Type f) Treatment zone contains inches of 0% soil credit, and ®inches of 50% soil credit. Giving a: 26) 24 inch, or 2.0 ft. Sand Lift Mound CRITICAL FOR FUTURE C€RTIFICATIONS!II 27) 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 281 0.0 ft. upslope and sideslope 17.0 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: �l 4:1 upslope ratio 11 ft. upslope berm ©) 4:1 sidestope 20 ft. sideslope berms s 3:1 downslope 1 23 Ift. downslope berm ap Overall Dimensions: 10.0 ft. wide by F38.6 ft. long Rock bed 44 ft. wide by r 78 1 ft. long Mound footprint 4" inspection pipe 18" cover on top Uostope berm 2 0 Ctean sand lift Depth to Limiting Limiting Conditiair ------ --- -- — Absorption Width 27.0 berm 23 12" cover on sides (6" loamy cap & 6" topsoil) Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes ;,1 %, Absorption Width is measured downhill from the upslope edge of the Bed. Rock Bed: 10.0 ft. by 38.0 ft. by ®inches under pipe, plus 20% gives =yd' or *1.4= 18 ton Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 32.4 up + 100.4 downslope + 24.9 ends + aEunder rock = =yd' or *1.4= F325 ton plus 20% sl Loamy Cap: 40 ft. by =ft, 6" deep, plus 20% gives 6r Topsoil: =ft, by 78 ft. 6" deep, plus 20% gives I hereby cer,.fy that I have completed this work in accordance with all 66 yd' or *1.4= =ton 77 yd' or *1.4 108 ton plicable ordinances, rules and la; r Rusty Olson"s Soil Et Perc 810 Signature Company License# Installer Summary Tnmt7nix 2000 gallon Septic tank (minimum) Tank options: none 1000 gallon Dose tank (minimum) at 25.00 g p i 2GPM C 23 ft. of head, Pump required 2 5.0 linch swing on Demand float which translates to roughly 3.5 inches of float tether length if time dosing is required - ? 5.7 minutes ON time Et hours OFF time 17 inches from bottom of tank to "pump ON" float, or 12 inches to "timer ON" float 20 1 inches from bottom of tank to "Hi Level Alarm" or 1 30 1 inches to "Hi level alarm' if time dosed 70 ft. of 2.0 inch supply line with end feed manifold connection (Tip: "top feed" manifold to control drainback) M inc,or2.0 ft. Sand Lift Mound ft. wide by 38.0 ft. long Rock bedlaterals 2.00 inch diameter 36.0 ft. long3.0 ft. lateral spacing inch perfs 3.0 ft. perforation spacing No Effluent filter Et alarm 3 clean out li valve box assemblies 27.0 Ift.TotaL sand ABSORPTION width (minimum) OA ft. upslope and sideslope (sand beyond rockbed, minimum) 17,0 ft. Downslope (sand beyond rockbed. rninimuml Specific slope ratios give BERM widths (topsoil beyond rockbed) of: 4:1 upslope ratio91ft. ft. upslope berm 4:1 sideslope ft. sideslope berms 3:1 downslope downslope berm 4" inspection pipe 18" cover on top Upslope berm = sl 1� t, Downslope berm 23 12" cover on sides (6" loamy cap & 6" topsoil) 2.0 I I Clean sand lift __ _ 1.0 Depth to Limiting Limiting Condition -- Absorption Width Note: For D to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >1%, Absorption Width is measured downhill from the upslope edge of the Bed. Rock Bed: 13.0 yd or "1.4= 18 ton 6 inches under pipe Mound Sand: 232 yd or `1.4= 325 ton calculation based on 3:1/4:1 slope from top of rockbet Loamy Cap: 66 yd3 or "1.4= 92 ton 6" deep Topsoil: 77 yd or *1.4= 108 ton 6" deep INSPECTOR CHECKLIST - mound 4.i3U LaKevrew Court WELL setbacks: 20' to pressure tested sewer line (5 psi for 15 min) 50' to everything 100' to dispersal area with shallow well PROPER'T'Y LINES setback: 10' to everything Road setback: platted: 10' prop line. Metes & bounds: out of road easement, or outer ditch. LAKE / BLUFF setback: 20' for bluff. Lakes: GD _, RD _, NE _. Protected wetland �. Building setbacks: 10' for everything, 20' for dispersal area. WATER LINE under pressure se 10' to bed,tank 8 sewer line. (else sewer line > 12" below) DSewer line It baffle connection (no 90's, 3' between 45's, slope min 1" in 8', max 2" in 8') (no depth reqs, clean out every 109, Sch 40 pipe) Septic tank and risers (water tight, insulated, proper depth, existing verified by pumping) mfg„_,_, 2000 gallons none Riser over outlet, riser over inlet or center, and 6"+ inspection pipe over any remaining baffles. No effluent filter fx alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) mfg 1000 gallons dose pump 22 gpm 23 head VERIFY PUMP CURVE 5.7 min ON 9 hr OFF float setting drop 5.0 inches at 25.o gpi "DESIGNED" 3.5 inches approx float tether length 125.0 gal 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) 2.0 inch supply pipe: Sch40, sloped 1/8"+, supported by 4" sch40 sleeve or compacted, and buried 6"+. splice box / control panel / electrical connections flow measurement: CT, ETM, time dosed, home water meter mound absorption area rough up mound rock dimensions 10.0 X 38.0 Sand lift depth 24 inches. (Jar test : 2" sand leaves < 1/8" silt after 30 min) Absorption Sand beyond rock 0.0 upstope 17.0 downslope Bermed topsoil beyond rockbed 11 upstope 20 sideslope 23 downslope cover depth of 12.18"+ VERIFY 3 laterals (1-2' from edge of rock) 2.00 inch pipe size (Sch40 pipe rt fittings) 3.0 ft lateral spacing B 7132 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 c 0 `-r d) U a a a a Z9 s 7S b O U) 0 0 3 V r O f0 Q OA U) c 0 `-r d) U Soil Observation Log www.Septickesource.com vers 12.4 Owner Information Property Owner / project: Norton Homes Date 10/3/2018 Property Address / PID: 4330 Lakeview Court Soil Survey Information ❑ refer to attached soil survey Parent matl's: E Tlli ❑ Outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ summit ❑ Shoulder 0 Side slope ❑ Tae slope soil survey map units: L41 C2 slope 12-15 % direction- Linear Soil Log #1 EJ Boring ❑ Pit Elevation 974.8 Depth to SHWT 18 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 10yr3/I Friable Moderate Block> 'O 7 O r6 t A (%1 i-+ 7 a r Q a c� > a afli a Ln 1JJ o m °a �1� -0 12 Ol In @ N G1 ch- 1� M Y' b fl N Soil Observation Log www.Septickesource.com vers 12.4 Owner Information Property Owner / project: Norton Homes Date 10/3/2018 Property Address / PID: 4330 Lakeview Court Soil Survey Information ❑ refer to attached soil survey Parent matl's: E Tlli ❑ Outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ summit ❑ Shoulder 0 Side slope ❑ Tae slope soil survey map units: L41 C2 slope 12-15 % direction- Linear Soil Log #1 EJ Boring ❑ Pit Elevation 974.8 Depth to SHWT 18 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 10yr3/I Friable Moderate Block> 4330 Lakeview Court Soil Log #2 g Boring ❑ Pit Elevation 974.8 Depth to SHWT 22 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 1Oyr3/1 Friable 6-10 Clay Loam <35 IOyr4/3 -35 Friable Strong Block) 10-18 Clay Loam <35 1Oyr5/4 <35 Friable Strong Blocky 18-24 Clay Loam <35 IOyr5/4 IOy4/8,1-6/I0y Firm Strong Blocky Strong Blocky <35 loose loose single grain 35 - 50 0 Boring ❑ pit Elevation 971.6 Depth to SHWT 12 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-16 fi•iable weak gramolar blocky Friable Mloderate Blocky finn moderate prismatic platy >50 rigid strong massive Comments: 4330 Lakeview Court Soil Log #2 g Boring ❑ Pit Elevation 974.8 Depth to SHWT 22 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 1Oyr3/1 Friable Moderate Blocky 6-10 Clay Loam -35 I Oyr4/3 Friable Strong Blocky 10-18 Clay Loam <35 l Oyr5/4 Friable Strong Blocky 18-24 Clay Loam <35 1Oyr5/4 IOy4/8,1-6/IOy Firm Strong Blocky 4330 Lakeview Court Soil Log #5 0 Boring ❑ pit Elevation 971.6 Depth to SHWT 12 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-16 Topsoil <35 1Oyi-3/1 Friable Mloderate Blocky I6-24 ClayLoanl <35 2.5y4/2 l0y4/8,1-6/10y Friable Strong Blocky" <35 0'"-6" Dark brown loam 10yr4/2 H2O present at _X loose loose single grain 12"-18" Rusty brown loam to clay loam 10yr5/4 35 -50 friable weak granular blocky firm moderate prismatic platy >50 rigid strong massive < loose loose single grain 35-50 friable weak granular blocky ficin moderate prismatic platy >50 rigid strong massive <35 loose loose single grain 35-50 friable weak granular blocky firm moderate prismatic platy >50 rigid strong massive I hereby certifi+this work was conrpleted in accordance with A4N 7080 and any local r•eg's. Rusty Olson's Soil & Perc. esigner Signature Company Logs of Soil Borings License #810 Location or Project: Lot 3, Blk 3 Borings made by: Rusty Olson`s Soil and Perc testing 6/1/2014 Classification System: AASHO ; USDS• USDS-SCS_X_; Unified ; Other Auger used (check two): Hand —X_, or Power, Flight, Bucket or Probe _X_ Boring Num r 1 Surface elevatio _984.8 Mottled Soil at_1.2_feet 0'"-6" Dark brown m 10yr4/2 H2O present at _X_ Y-14" Brown loam 10yr 14"-22" Rusty bro Dam 10yr 810 License # Boring Number _ Surface a nation —984.9 Mottled Soil at -1.5— feel 0"-6" Dark brown loa 10yr H2O present at _X _ 6"-14" Brown loam 10yr 14"-18" Brown loam 1 r5 18"-24" Rusty bro loam to cl loam 10yr5/4 Boring Number _3_ Surface elevation _982.7 Mottled Soil at —1.2— feet 0"-6" Dark brown loam 10yr4/2 H2O present at —X— X_6"-14" W-1 4"Brown loam 10yr5/4 14"-20" Rusty brown loam to clay loam 10yr5/4 Boring Number 4_ Surface elevation _982.3 Mottled Soil at _1.0_ feet 0'"-6" Dark brown loam 10yr4/2 H2O present at _X 6"-12" Brown loam 10yr5/4 12"-18" Rusty brown loam to clay loam 10yr5/4 Boring Number-- 5 Surfac elevation _984.8 Mottled Soil at – 1.3 feet 0"-6" Dark brown loa 10 4/2 H2O present at _X_ 6"-16" Brown loam 10yr 4 16'° 22" Rusty brown am clay loam 10yr5/4 Boring Number 6 Surface elevation _979.7 Mottled Soil at — 1.3 feet 0-8" Dark brown loam 10yr3/2 H2O present at —X— W-16" Brown loam 10yr4/4 16"-22" Rusty brown loam to clay loam 10yr5/3 Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:18 A.M. On 10/04118 Location: 4330 Lakeview Court Hole number: 1 Date hole was prepared 10/03/18 Depth of hole bottom _12"_ inches, Diameter of hole _6"_ inches. Soil data from test hole: Depth, inches 0-6 6-10 10-12 Soil texture Topsoil 10yr3/2 Clay Loam 10yr4/3 Clay loam 10yr514 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 10/03/18 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 H2O Perc Rate 10:38 10:53 6" 0.9 16.6 10:56 11:11 6" 0.9 16.6 11:12 11:27 6" 0.9 16.6 AVERAGE FERC. RATE 16.6 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:18 A, M, On 10/04/18 Location: 4330 Lakeview Court Hole number: 2 Date hole was prepared 10/03/18 Depth of hole bottom _12"_ inches, Diameter of hole _6"_ inches. Soil data from test hole Depth, inches Soil texture 0-6 Topsoil 10yr312 6-10 Clay Loam 10yr413 10-12 Clay loam 10yr5/4 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 10/03/18 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 H2O Perc Rate 10:39 10:54 6" 1.0 15.0 10.55 11:10 6" 1.0 15.0 11:13 11:28 6" 1.0 15.0 AVERAGE PERC. RATE 15.0 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc_ starting at 12:20 P.M. On 7/03114 Location: Lot 3, Blk 3 Hole number: 3 Date hole was prepared 7102114 Depth of hole bottom _12"i inches, Diameter of hole ,__B"_ inches. Soil data from test hole: Depth, inches Soil texture Dark brown loam 10yr412 Brown loam 10yr5/4 Method of scratching side walk- Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 7/02/14 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 H2O Perc Hate 12:36 12:51 6" 1.0 15.0 12:54 1:09 6" 1.0 15.0 1:14 1:29 6" 1.0 15.0 AVERAGE PERC. RATE 15.0 WIPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Pero. starting at 12:20 P.M. On 7103114 Location: Lot 3, Blk 3 Hale number: 4 Date hole was prepared 7102114 Depth of hole bottom �12" inches, Diameter of hole �6"_ inches. Soil data from test hole: Depth, inches 0-6" 6"-12" Soil texture Dark brown loam 10yr4/2 Brown loam 10yr5/4 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 7102/14 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 H2O Pero Rate 12:37 12:52 6" 0.8 18.7 12:53 1:08 6" 0.8 18.7 1:15 1:30 6" 0.8 '18.7 AVERAGE PERC. RATE 18.7 MPI 1� \ 'I,O {1 w bIP \ ..'�,•o .y ,, lY i rob \ ' 'I \5�• 1.4F� \ • qAM: � :.; f,'u" V �1 A 6�E.� 5 n� Fez. WRVEYI£9aD _ ""'^� f,Y' "'. CERTIiiCATROF SURVEY 1 SATHREAERGQUIST.INC. ORONd, NORTONNNONT vxtrn7 � 'ti �% •���� � MINNE50Tp IIOhtFS � 1�r 1 i Fez. WRVEYI£9aD _ ""'^� f,Y' "'. CERTIiiCATROF SURVEY 1 SATHREAERGQUIST.INC. ORONd, NORTONNNONT vxtrn7 � 'ti �% •���� � MINNE50Tp IIOhtFS �