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HomeMy WebLinkAbout08-06-2020 Septic design - newJoseph Olson D.B.A. Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License # 810 11481 Riverview Rd. NE, Hanover, MIN 55341 (763) 498-8779 Fax (763) 498-8290 .August 6, 2020 Kirby Sneen 765 Lakeview Parkway Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type 1 five -bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The home owner want to move the mound to the future site. Care must be taken when the existing mound is removed because it will now be the future site. The periodically saturated soils were located at 20-24 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 9.1 MPI. The existing septic tanks and lift station may be used. 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 septic sstem. 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. Sincerel Joseph J. Olson Is- e] 1 VAL(5-:1 s '00 Of IT, 60 -9c 061 29 O P, nD BLOCK 2 95C 91a ry LOT I 7c r �949 91 co t Ssga . ...... 04'38 L7y Q. 'r ir cu e d W n N q SD v f�6 a, �1 iR rrt 2011 purple code Mound Design wrovw.SepticResouree.com (vers 19.2) Property Owner: Kirby Sneen Site Address: 765 Lakeview Parkway Date: 8/6/2020 PLD: 0611723340010 Comments: New primary instructions: = = enter data = = adjust if desired = computer calculated - DO NOT CHANGE! 1) bedroom Type 2) 750 GPD design flow 3) Yes Garbage disposal or pumped to septic 4) 2250 Gal Septic tank (code minimum) 1.2 GPD/ft z mound sand loading rate Residential System 50% larger tank with multiple comp/tanks 2250 Gal Septic tank (design size / LUG req'd) Tank options: Multiple tanks or compartments req'd contour loading rate of 12 req's a min 63 ft. long rockbed 6) 9.9 ft rockbed width 63.0 ft rockbed length 7) 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) end feed manifold connection 8) Olaterals 61.0 feet long 21.0 perfs / lateral 63 perfs total (1 /2 a perf means the first perf starts at the middle feed manifold) g) 7/32 inch perfs at feet residual head gives 0.56 gpm flow rate per perforation for this perf size lit spacing, li pipe size on line 12, max perfs/lateral = 30 , line #8 must be less > OK 10) 4.0 doses per day ( 4 minimum) 11) 188 gallons per dose (treatment volume) 12) 2.00 inch diameter laterals must be used to meet "4x pipe volume" requirement 131 F 65 feet of 2.0 inch supply line leads to =gallons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 199 gallons TOTAL_ pump out volume (treatment + drainback) 15) 1 15 Ifeet vertical lift from pump to mound laterals, leads to a: 16) 1 36 GPM @ 23 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) 17) 750 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 1 25,48 Igpi leads to a: I Optional Time dosing of: !18) 7.8 inch swing on Demand float, (this delivers Average flow, =70% of Peak design flow) 5.5 min ON 19) 12 inches from bottom of tank to "Pump OFF" float 8.5 hrs OFF 20) 20 linches from bottom of tank to "Pump ON" float 12 inches to "Timer ON" float 221) 23 linches from bottom of tank to "Hi Level" float 33 inches to "Hi Level" float bb4 gallons reserve capacity (after High Level Alarm is activated -demand dosed) .3) D.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 2.7 4) 15 percent site slope (0-20% range) 15 (% downslope site slope, if different than upslope) 5) 20 inches, or 1.7 ft. to Redox or other limiting condition (need at least 12" to be a Type 1) Treatment zone containsFD inches of 0% soil credit, and ®inches of 50% soil credit. Giving a: 6) 16 inch, or 1.3 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONS! 11 7) 26.8 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 8) 0.0 ft. upslope and sideslope 16.9 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: 9) 4:1 upslope ratio 9 ft. upslope berm 0) 1 3:1 Isideslope 14 ft. sideslope berms t) 1 3:1 Idownslope 3D ft. downslope berm 2) Overall Dimensions: 9.9 1 ft. wide by 63.0 ft. long Rock bed 49 ft. wide by 91 ft. long Mound footprint 4" inspection pipe 18" corner on top Upstope berm Downslope berm 30 12" cover on sides (6" loamy cap &6" topsoil) 1.3 Clean sand lift 1�.7 Qepth to Limiting Limiting, Canditicsn Absorption Width Note: For 0 to 1% slopes, Absorption Wdth is measured from the Bedequally in both directions. For slopes >1%, Absorption !-1�idth is measured downhill from the upslope edge of the Bed. 33) Rock Bed: 9,9 ft. by =ft. by inches under pipe, plus 20% gives =yd3 or *1.4= 29 ton 34) Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 20.8 up + 127.6 downslope + 16.1 ends + 48.1 under rock = 255 yd' or *1,4= 357 ton plus 20% 35) Loamy Cap: 45 ft. by $7 ft. 6" deep, plus 20% gives =yd' or *1.4= 122 ton 36) Topsoil: 49 ft, by 91 ft. 6" deep, plus 20% gives 99 yds or *1.4= 139 ton I hereby cer ' y that I have completed this work in accordance with all applicable ordinances, rules and laws. Rusty Olson's Soil i3 Perc 810 8/6/2020 signer Signature Company License# Date Installer Summary 2250 gallon Septic tank (minimum) Tank options: Multiple tanks or compartments req'd au70 Larger eanK WILn muLupLe comptL.anK5 1250 gallon Dose tank (minimum) at 25.49 gpi 36 GPM C 1 23 Ift. of head, Pump required 7.8 inch swing on Demand float which translates to roughly 4.9 inches of float tether length upu naL i ime aosrng or: 5.5 minutes ON 20 inches from bottom of tank to "pump ON" float, or 8.5 hours OFF 23 inches from bottom of tank to "Hi Level Alarm" or 12 inches to "timer ON" float 33 inches to "Hi level" float 65 ft. of 2.0 inch supply line with end feed manifold connection (Tip: "top feed" manifold to control drainback) 16 inch, or 1.3 ft. Sand Lift Mound 9.9 ft. wide by 63.0 ft. long Rock bed 3 laterals 2.00 inch diameter 61.0 ft. long F 3.0 ft. lateral spacing 7/32 inch perfs 3.0 ft. perforation spacing No Effluent filter li alarm 3 clean out Et valve box assemblies 26.8 ft.Total sand ABSORPTION width (minimum) OA 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: 4:1 upslope ratio 4 Ift. upslope berm 3:1 Isideslope 14ft. sideslope berms 3:1 downslope 30 ft. downslope berm 4" inspection pipe 18" cover- on top 1, Upslope berm sl 1� b Downslope berm 30 12" cover on sides (6" loamy cap &6" topsail) 1.3 11 Clean sand lift _ 1.7i3e3pth to Limiting Limiting CQndition� — --_ ,Absorption Width Note: For 0 to 1% slopes, Absorption Width is measurer) from the bedequally in both directions. For slopes >1%, Absorption Width is measured downhill from the upslope edge of the Beed Rock Bed: 21.0 yd or *1.4= 29 ton Mound Sand: 255 yd or *1.4= 357 ton Loamy Cap: 87 yd or X1.4= 122 ton Topsoil: 99 yd or *1.4= 139 ton INSPECTOR CHECKLIST 6 inches under pipe calculation based on 3:1/4:1 slope from top of rockbe 6" deep 6" deep - mound /65 LaKeview NarKway WELL setbacks: 20'- 50' to sewer line req's MDH pressure test form (5 psi for 15 min) 50' to everything 100' to drainfield with shallow well PROPERTY LINES setback: 10' to everything Road setback: platted: 10' prop line. Metes at 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 10' to bed,tank Et sewer line. (else sewer line > 12" below) Sewer line Et tank connection (no hard 90's, long sweep 90 or 2-45's, slope minimum 1" in 8' = 1%) (no depth req's, clean out every 100', Sch 40 pipe) Septic tank and risers (water tight risers, baffles, insulated, proper depth, existing verified by pumping) Mfg-_ 2250 gallons Multiple tanks or compartments req'd 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 risers, insulated, proper depth, drainback) Mfg 1250 gallons Optional Time dosing of: dose pump 36 gpm 23 head VERIFY PUMP CURVE 5.5 min ON 8.5 hr OFF verify that installed "vertical lift from pump to laterals" is no more than design value of 15 feet float setting drop 7.8 inches at 25.5 gpi "DESIGNED" 4.9 inches approx float tether length 199.0 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 9.9 X 63.0 Sand lift depth 16 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 9 upslope 14 sideslope 30 downslope cover depth of 12-18"+ VERIFY 3 laterals (1-2' from edge of rock) 2.00 inch pipe size (5ch40 pipe Et fittings) 3.0 ft lateral spacing e 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 90's) 4" inspection pipe to bottom of rock, anchored VERIFY Abandon existing system - if necessary �Re-use existing tank certification monitoring pian and type well abandonment form - if necessary r 1 Q a as .� O ca m t Y w 0Lw f f An L W C L0 t3 ao V 1L I 4A i7 1 Q a as .� ca Y f f 1L I 1 Q a as .� f f 1� 1 Q a 6) N 'o lw 6A cc a �! :3 _c QT K t/� N as .� f f 6) N 'o lw 6A cc a �! :3 _c QT K t/� N Soil Observation Log www.5eoticResource.com vers 12. Owner Information Property Owner / project: Gonyea homes Date 11/17/2017 Property Address / PID: 765 Lakeview Parkway Soil Survey Information ❑ refer to attached soil survey Parent matl's: ❑J -ni ❑ outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: 0 summit ❑ Shoulder ❑ Side slope ❑ Toe slope soil survey map units: L41C:2 slope 12-15 % direction- Linear -concave Soil Log #1 Boring ❑ Pit Elevation 949.0 Depth to SHWT 22 Inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-12 Topsoil <35 10yr3/1 Loose Moderate Blockv 12-22 Loam <35 1Oyr4/3 Friable Strong Blocky 22-30 Clay Loam <35 10yr5/4 IOy4/$,1-6/IOy Friable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 ftrtn moderate prismatic platy rigid strong massive <35 loose loose single grain 35 -50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive Comments: ######## Soil Log #2 [Q Boring ❑ pit Elevation 949.0 Depth to SHWT 24 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-8 Topsoil <35 10yr3/l Loose Moderate Blocky 8-14 Sandy Loam <35 IOyr4/ Friable Strong Blocky 14-24 Sandy clay Loam <35 10yr5/4 Friable Strong Blocky 24-30 Sand\ I.oaln <35 10yr5/3 IOy4/8,1-6/10y Friable Strong Blocky 765 Lakeview Parkway Soil Log #3 El goring ❑ pit Elevation 946.1 Depth to SHWT 20 inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-10 Topsoil <35 10yr3/1 Loose Moderate i;i()cik% 10-16 Sandy Loam <35 1Oyr4/3 Friable Stron4- 16 --'1 0 Sandy clay Loam <35 10yr5/4 friable Strong Blocky 20-26 Sandy clay Loam <35 10yr5/3 10y4/8,1-6/1Oy Friable Strong Blocky I hereby ceriil.i• ihi rk was completed in accordance with MN 7080 and any local reqs. Rusty Olson's Soil & Pere. 810 Signature Company License # 765 Lakeview Parkway ,Soil Log #4 El Boring ❑ pit Elevation 946,1 Depth to SHWT 22 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 12-22 Clay Loam <35 I Oyr5/4 Friable Strong Blocky -),-30 Clay Loatn <35 10yr6/4 I0y4/8,1-6/1Oy Friable Strong Blocky 435 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive 765 Lakeview Parkway Soil Log #5 El Boring ❑ pit Elevation 949.0 Depth to SHWT 22 Inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-12 Topsoil <35 10yr3/1 Loose Moderate Blocky l2 -?2 Loam <35 1Oyr4/3 Friable Strong Blocky Clay Loam <35 10yr5/4 1Oy4/8,1-6/1Oy Friable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky - >50 firm moderate prismatic platy rigid strong massive <35 loose loose single grain 35-50 friable weakgranular blocky >50 firm moderate prismatic platy rigid istrong massive I 1 hereby cert' ? is work was completed in accordance with MN 7080 and any local reqs. Rusty Olson's Soil & Perc. 810 esigner Signature Company License # Soil Observation Lag www.SepticResourcc.com vers 12. Owner Information Property Owner / project: Gonyea Homes Date 11/17/2017 Property Address / PID: 765 Lakeview Parkwav Soil Survey Information ❑ refer to attached soil survey Parent mads: 0 Till ❑ outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ Summit ❑ Shoulder ❑.r Side slope ❑ Toe slope soil survey map units: L41 C:2 slope 12-15 % direction- Linear -concave Soil Log #6 0 Boring ❑ Pit Elevation 949.0 Depth to SHWT 20 Inches Djspth (in) Texture fragment % matrix color redox color consistence grade shape 0-5 Topsoil <35 1Oyr3/2 Loose Moderate Blocky 8-14 Loam <35 1Oyr4/3 Friable Strom lflock.> 14-20 Clay Loam <35 10yr5/4 Friable Strong Bl ck\ 20-26 Clay Loam l0\1.4 10y4/8,1-6/IOy° I riable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive C onunents: Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 12:35 P.M. On 11/18/17 Location: 765 Lakeview Parkway Hole number: 1 Date hole was prepared: 11/17/17 Depth of hole bottom _12"_ inches, Diameter of hole _6"_ inches. Soil data from test hole: Depth, inches Soil texture 0-12 Topsail 10yr311 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/17117 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 12:45 115 6" 1.7 17.6 1:22 1:52 6" 1.6 18.7 1:53 2:23 6" 1.6 18.7 AVERAGE PERC. RATE 18.3 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson`s Perc. starting at 12:35 P.M. On 11/18117 Location: 765 Lakeview Parkway Hole number: 2 Date hole was prepared: 11117117 Depth of hole bottom ,12 inches, Diameter of hole _6"_ inches. Soil data from test hole: Depth, inches Soil texture 0-8 Topsoil 10yr311 8-12 Loam 10yr413 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/17/17 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 12:46 1:16 6" 5.5 5.4 1:21 1:52 6" 5.5 5.4 1:54 2:23 6" 5.5 5.4 AVERAGE PERC. RATE 5.4 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 12:35 P.M. On 11118117 Location: 765 Lakeview Parkway Hole number: 3 Date hole was prepared: 11/17/17 Depth of hole bottom _12"_ inches, Diameter of hole _6"_ inches. Soil data from test hole: Depth, inches Soil texture 0-10 Topsoil 10yr3f1 10-12 Loam 10yr413 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/17/17 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 12:47 1:17 6" 5.5 5.4 1:20 1:50 6" 5.5 5.4 1:55 2:25 6" 5.5 5.4 AVERAGE PERC. RATE 5.4 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty ©lson's Perc. starting at 12:35 P.M. an 11/18/17 Location: 765 Lakeview Parkway Hale number: 4 Date hole was prepared: 11/17/17 Depth of hole bottom _12"` inches, Diameter of hole _6"_ inches. Soil data from test hole: Depth, inches Soil texture 0-6 Topsoil 10yr311 6-12 Loam 10yr413 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/17/17 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 12:48 1:18 6" 4.2 7.1 1:19 1:49 6" 4.1 7.3 1:56 2:26 6" 4.0 7.5 AVERAGE PERC, RATE 7.3 MPI