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HomeMy WebLinkAbout9-13-18 Septic Designi `r Joseph Olson D.B.A. Rusty Olson's--Soil and Percolation Testing Joseph J. Olson—MPGA License 9 810 11481 River -view Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 September 13, 2018 William & Laurel Maclachlan 3565 6f Ave. N Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type ifive-bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The periodically saturated soils were located at 16-28 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 existing septic system does not conform to the state code chapter 7080 All neighboring wells are greater than 100' from proposed treatment areas. Extra precaution should be taken to confirm that the system is nlaced in the exact area shown to maintain the 50 foot existing well setback,. The soils at a depth of 12" have a percolation rate averaging 3 MPI. The existing septic tanks must be abandoned. New septic tanks need to be installed that meets 2250 -gallon septic tank capacity. 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. A 1250 -gallon pumping chamber will need to be installed to Iift 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 trust be installed. Including but not Iunited to a water meter, event counter, running time clocks or electronically controlled dosing. 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 an into the septic 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, Joseph J. Olson 7msJA--7kf _qF 64!y jt wLee-L fa5 iY EASEMENT No. 4190220 J wawh m BLACKTOPTAVXJ ORIVEWAY E*rPEXISTIN;"- r OUSE *M65 io W&4 - I Tito rbs Lf.5 s YsTgAk k GAP IN iRtrDl % X3 Q X3 eftw* • A; 5,0 &A4 MOMD SMEM DESySN Ek 'Wm. Avenge PemDbdion rare TM M �YlgaVday T"ILW11-1 .��Sq.ft Oft=tnient area VID ft. wUffi =� ft length of bed area �., bw FMpay time EL Side sk" rung -/ to I xjLhelght YLft.,, ftft04 I 11 &a do *AEL-- Im. rm. J -e— *Mft& - — RGUIPSM UUMM =9 — Clean rod needed plus 20%MWSL Coarse washdd san Yds. AveraW sand de pM I is 91= am , Sandy;wma-myds.. c &" mft� Number of tanks ;,gb Ap&. ta UA P=lp damher capcty.L�sz) ggs. Dl� P'Pe -2t-" 43- -LtAL 1 -'Ma I Rxt-2L;_L dia. PWmatb.,, 34 Rwtsetall,->2- PL&, fences perday Pump cume 4 /n L —;,r fitet head Wmm Tw DAM vwv4%X c" ammu 17.3 MUM41MOF v4.0 Llv*6 rim: L&Ph. 763-49&V79 RxVVM��=d Pem DPA�t� -By 2011 purple code Mound Design www.SeplicResource,com (vers 95.2) Property Owner: William & Laurel Maclachlan Site Address: 3565 Sixth Ave. N. Date: 9/1312018 PID: 2911823430003 Comments: instructions: = - enter data ®= adjust if desired - computer calculated - DO NOT CHANGEI bedroom Type 750 GPD design flow =Garbage disposal or pumped to septic 2250 Gal Septic tank (code minimum) 1.2 GPD/ft2 mound sand loading rate Residential System 50% larger tank with multiple comp/tanks 2250 Gal Septic tank (design size / LUG req'd) Tank options: none contour loading rate of 12 req's a min 62.5 ft. long rockbed 9Q.4 ft rockbed width 63.0 ft rockbed length 3.0 ft lateral spacing 3.Q ft perforation spacing (maximum of 3 for both) end feed manifold connection laterals 61.0 feet long 21.0 perfs / lateral b3 perfs total (1 /2 a perf means the first perf starts at the middle feed manifold) 7/32 inch perfs at =feet residual head gives 0.5b gpm flow rate per perforation for this pert size rt spacing, Et pipe size on line 12, max perfs/lateral 30 , tine #8 must be less — OK la) 4.0 doses per day ( 4 minimum) 1 1) 188 gallons per dose (treatment volume) 2.00 5x 12) 2.00 inch diameter laterals must be used to meet '4x pipe volume" requirement 2.00 3x 13) 194 feet of 2.0 inch supply line leads to =gatlons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 207 gallons TOTAL pump out volume (treatment + drainback) rs} 1 15. Ifeet. vertical lift from pump to mound laterals, leads to a: 16) 1 36 GPM @ =feet of head, Pump requirement (note: >50gpm may require an extra 3-6 of head) 17) 750 gat Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 25.49 gpi leads to a 18) 8.1 inch swing on Demand float, or timed dosing of 5.8 min ON (confirm pump rate with drawdown (this delivers Average flow, -70% of Peak design flow)F--9 hrs OFF test and adjust as necessary) 19) 12 I inches from bottom of tank to 'Pump OFF" float 20) 20 linches from bottom of tank to 'Pump ON" float, or1inches to -rimer ON" float if time dosed 21) 23 inches from bottom of tank to 'Hi Level" float, or F33qinches to 'Hi Level" float if time dosed 22) b64 gallons reserve capacity (after High Level Alarm is activated) 0.45 gpolfe Absorption area Soil Loading Rate, which gives a mound ratio of(minimum) (this must match the soil boring log) desired mound ratio 2.7 percent site slope (0-20% range) �(% downslope site slope, if different than upslope) t8 inches, or F 1.S ft. to Redox or other limiting condition (need at least 12" to be a Type 1) Treatment zone contains=0 inches of 0% soil credit, and =inches of 50% soil credit. Giving a: 18 inch, or F 1.5 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATI©N51I1 27.o ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 0.0 ft. upslope and sideslope 17.0 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: 4:1 upslope ratioITft. ft. upslope berm 3:1 sideslope ft. sideslope berms 4:1 downslope downslope berm Overall Dimensions: 10.0 ft. wide by REq ft. lung Rock bed 44 ft. wide byft. long Mound: footprint 4' inspection pipe 16' cover on top lipslope berm = .1 T 1� 1. Downslone berm 23 �� 12" cover on sides (6' loamy cap & b' topsail) 1.5 Clean sand lift __ 1.5 Depth to Limiting Limiting Condition -----------___ Width— z7.o — '—T �______—__ Absorption Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >I%, Absorption Wldtfi is measured downhill from the upstope edge of the bed. Rock Bed: 10.0 ft. by 63.o ft. by inches under pipe, plus 20% gives 21 yd' or'1.4- 29 ton Mound Sand: (note: volume is based on 3:114:1 slope from top of rockbed, Exchange sand for loamy cap if desired) Z9.3 up + 85.4 downslope + 11.4 ends + 43.2 under rock - 203 yd' or *1.4- 1 284 ton Pius 20% Loamy Cap; Oft. by 8S ft. 6' deep, plus 20% gives Topsoil: ®ft. by 89 ft. 6- deep, plus 20% gives 76 yd' or'1.4g 106 ton 8a yd -'or -1.4- 123 ton accordance with all applicable ordinances, rules Rusty Olson's Soil It Perc 810 9113/2018 Signature Company License# bate Installer Summary 2250 gallon Septic tank (minimum) Tank options: none atm urger ianK wim MUMpte comer ranKs 1250 gallon Dose tank (minimum) at EDP' 36 JGPM @ 25 ft. of head, Pump required 8.1 inch swing on Demand float which translates to roughly 5.1 inches of float tether length if time dosing is required -->5.8 minutes ON time li ®hours OFF time 20 inches from bottom of tank to "pump ON' float, or 12 1 Inches to 'timer Ohl' float 23 linches from bottom of tank to "Hi Level Alarm' or 133 Inches to 'Hi level alarm' if time dosed =ft. of 2.Q inch supply Linc 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 63.0 ft. long Rock bed 3 laterals 2.00 Inch diameter =ft. Long =ft. lateral spacing 7/32 inch perfs 3.0 ft, perforation spacing No lEfftuent filter & atarm 3 clean out ii valve box assemblies 27.0 ft.Total sand ABSORPTION width (minimum) 0.0 ft. upslope and sidestope (sand beyond rockbed, minimum) 17.0 ft. Downslope (sand beyond rockbed, minimum) Specific slope ratios give BERM widths (topsoil beyond rockbed) of: 4:1 upstope ratio91ft. ft. upslope berm 3:1 sidestope ft. sidestope berms 4:1 downslope downstope berm 4" inspection pipe 18" cover on top berm 11 .IT 1� V Downstoae bean 23 12" cover on sides (6'" loamy cap & 6" topsoa) 1.5 Glean sand lift _ _ 1`5 Depth to Limiting Limiting Condition--------------.—_—�— I Absorption Width 27.0 —~_ Mote: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >1%, Abwrptton Wdth is measured downhill from the upslope edge of the Bed. Rock Bed: 21.0 yd3 or `1.4= 29 ton Mound Sand: 203 yd3 or *1.4= 284 ton Loamy Cap: 76 yd3 or "1.4- 106 ton Topsoil: 88 yd' or *1.4- 123 ton Inches under pipe calculation based on 3:1/4:1 slope from top of rockbe( 6' deep 6' deep INSPECTOR CHECKLIST - mound Si 0 Sixth Ave. N. WELL setbacks: 20' to pressure tested sewer line (5 psi for 15 min) 50' to everything 100' to dispersal area with shallow well PROPERTY LrNES setback: 10' to everything Road setback: platted: 10' prop line. Metes Et bounds: out of road easement, or outer ditch. LAKE / BLUFF setback: 20' for bluff. Lakes: GD —, RD —, NE Protected wetiand �. Building setbacks: 10' for everything, 20' for dispersal area. WATER LINE under pressure se 10' to bed,tank Ft sewer line. (else sewer line > 12" below) Sewer line Ft baffle connection (no 90's, 3' between 45s, slope min 1" in 8', max 2" in 8') (no depth reqs, clean out every 100', Sch 40 pipe) Septic tank and risers (watertight, insulated, proper depth, existing verified by pumping) Mfg. 2250 gallons none Riser over outlet, riser over inlet or center, and 6"+ inspection pipe over any remaining baffles. No effluent filter it alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) mfg 1250 gallons dose pump 36 gpm 25 head VERIFY PUMP CURVE 5.8 min ON 9 hr OFF float setting drop 8.1 inches at2-5.5 gpi "DESIGNED- 5.1 inches approx float tether length 207.0 gal dose divided by gpi "INSTALLED" - inches float drop (field corrected LABEL pump requirements and drawdown on riser or panel Gam 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: Cf, ETM, time dosed, home water meter mound absorption area rough up mound rock dimensions 10.0 X 63.0 Sand lift depth 18 inches. (Jar test : 2" sand leaves < 118" silt after 30 min) Absorption Sand beyond rock 0.0 upslope 17.0 downslope Bermed topsoil beyond rockbed 11 upslope 13 sideslope 23 downslope cover depth of 12-18"+ VERIFY 3 laterals (1-2' from edge of rock) 2.00 inch pipe size (Sch40 pipe Ft fittings) 3.0 ft lateral spacing 8 7/32 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 99s) 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 wolloq Nuel wolloq Nuel WORN NUel lalul IaN! lalu► opeag apeig apeig Nue.L duind (ajgexjdde!!) Nuel3lldas Nuel ovda5 I I I (Raq imi adolsdn ►e) iMHS (Raqj3oj adojsdn ►e) apeag looa wolloq �} lerolel 1 deo Aweol r punow ; f. IMHS ---- - _ 1 l adid apetg asnoq Sullin adld aamaS 1 I'alay paquasap pue UM045 aq pino4s 41 pailsap si apeag leu!; luajaglp e ji •Bullslxa ale suollenala apeag) �aemgauaq -- SUOIJeA913 walsAS Soil Observation Log SO Log #1 Q Bwrtg ❑Pit Elevatica 973 Depth la SHWT 28 1ahes Depth 60 Texrare 6aynrnt % m¢aix calor red—lor camistenea &r -de w STtfcRaocn¢.rc.P S M4 Topsail 135 Ovaer ilnfermadon Friable Propeny0wn¢r/pMjcat: William&LatmelMaclachlan ota3y nate 917/20[8 Pro" Add— lPm: 3565 Sixth Ave. N. IOyr413 Enable Friable Strong Blocky 28-36 Clay Lpant X35 Snil Survey Information ❑ de ma afirdsoasnvey Parent_LPS: l] no ❑ am asp ❑ tac m ❑ moral ❑ ftark ❑ aedccdc len&_pcposilion: ❑Sunndt ❑M—Wer ❑vde a -Pe [I To Stop. soil survey map a nits: L22112 slope 7 % dir cdcot-Linear SO Log #1 Q Bwrtg ❑Pit Elevatica 973 Depth la SHWT 28 1ahes Depth 60 Texrare 6aynrnt % m¢aix calor red—lor camistenea &r -de a -IB Topsail 135 1oyr311 Friable Friable Moderate ota3y I8 -2B Clay Loam 45 IOyr413 Enable Friable Strong Blocky 28-36 Clay Lpant X35 10yr5r4 10y413,1fill0y Fitm Strong M-ky Q5 -35 lapse loose hoose :v<pa sra;a 35.50 35 -SQ friable fvm friable cask -.1. black, >50 )SQ rigid firm ooderate Pdrmwc PlaY Gt5 loose rigid 57ung i 35-50 C35 friable Firm loose loose A.Lkeraie >50 35-50 rigid friable weak 8-0.+ Ed-Ay>30 Ave. N. Sos1Lo A13 firm moderate yrta—lie Platy Depth (M)Tom— fragment% matrix color redox color consisEetsse grade Shape 0-9 Tepsoil <5 10yr3h rigid stroma rvanlrc Comments: ❑� -no ❑Pit Elevation 97.3 Depth to SHWT 16 Inche.+ D Go) Tbxtrtr¢ ftng".t% morn=calor ocdw:colar eeosirteoce rJade Ors T.In-1 45 loyr412 Friable Moderate Inkcky 6-16 Clay Lara -t3.5 10yr5f4 Enable Strong alarky 16-24 Clay Loam <5 10yr514 IOy4f8,1.6R0y Finn Strong Irw:ty Q5 lapse Ioe¢e sialic rram 35.50 friable fvm weak roodetate pe ft blocky Prumaric PWY >50 rigid Strong Gt5 loose loose amra rrera 35-50 friable Firm weak moderate p-4. bwday pi -fie Platy. >50 rigid strong musivc 3565 Sixth Ave. N. Sos1Lo A13 216adfy ❑Rt Elevation 99.1 Depot to SHWT 18 1=b - nebaDepth(in) Depth (M)Tom— fragment% matrix color redox color consisEetsse grade Shape 0-9 Tepsoil <5 10yr3h Friable Moderate Blocky 8-12 Loam <5 IOYW3 Friable Strang a"41 12.18 Clay Loam 135 10yr514 Friable Strong Bluely 18.24 CIayI — 45 I0yr514 10y418,1 -6110y Firr Strong Bimcky 45 tease loose ata¢Icgm,n 35 -so friable wait P. -I r blocky >50 firm rigid moderate strung Pd PIMY — 1 hereby cert this work was completed bt amordmce with MN70d0 ondar y loarl tag's. Rusty Olsores Sail & P= 810 igner Signature Compeoy License 9 signer Signature Soil Lo #4 Elevation 99.1 Depth to SHWT 24 inches matrix color redox color consistence grade shape 10yr3r2 Friable Moderate Blocky 10yr4/3 Friable Strong Blocky 10yr514 IOy4/8,1-6110y Firm Strong Blocky loose loose singlegrain friable weak granular blocky fum moderate Prismatic Platy rigid strong massive loose loose single grain friable weak granular blocky firm moderate Prismatic platy rigid strong massive Soil Log #5 Elevation Depth to SHWT Inches natrix color redox color consistence grade shape loose loose single grain friable weak granular blocky firm moderate prisma is platy rigid strong massive loose loose single grain friable weak granular blocky fum moderate Prismatic PIatY rigid strong massive loose loose single gna friable weak granular blocky firm moderate prismatic glary rigid strong massive loose loose single grain friable weak granular blocky firm moderate Prismatic pIaty rigid strong massive loose loose single grain friable weak granular blocky firth moderate prismatic platy rigid Ong massive nce with MN 7080 and any local reqs. RustY Mods Soil & Perc 810 Company license Percolation Test Data Sheet !_ic.#810 Percolating test readings made by: Rusty Olson's Pere. starting at 10:12 A.M. On 9108118 Location:. 3565 6th Ave. N. Hole number. 1 Date hole was prepared: 9107/18 Depth of hole bottom ._„_.12'1 inches, Diameter of hole 6_ inches. Soil data from test hole: Depth, inches Soil texture 0-12 Topsoil 10yr311 Method of scratching side wall: Knife Depth of gravel In bottom of hole 2 inches: Date of initial water filling 9107118 depth of initial water filling 12 inches above the 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 10:22 10:37 6" 5.1 2.9 10:40 10:55 6" 5.0 3.0 10:56 11:11 6" 5.0 3.0 AVERAGE PERC. RATE= 3.0 MAI Percolation Test Data Sheet uc.#810 Percolating test readings made by: Rusty Olson's Pere. starting at 10:12 A.M. On 0108118 Location: 3565 6th Ave. N. Mole number: 2. Date hole was prepared: 9107118 Depth of hole bottom _12"_ inches, Diameter of hole 6"_ inches. Soil data from test hole: Depth, inches Soil texture 0-6 Topsoil 10yr412 6-12 Clay Loam 10yr514 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 9107118 depth of initial water filling 12 Inches above the 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 10:23 10:38 6" 5.0 3.0 10:39 10:54 6" 5.0 3.0 10:57 11:12 6" 5.0 3.0 AVERAGE PERC. RATE 3.0 NIP]