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Home My WebLink About12-06-2017 Septic DesignJoseph Olson D.B.A. Rusty Olson's--Soil and Percolation 'Vesting Joseph J. Olson--MPCA License #810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 Revised December 6, 2017 Gonyea Homes 420 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 periodically saturated soils were located at 18-32 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. A diversion uphill and the road side of the system must be made to divert all the runoff comin2 at the System. The soils at a depth of 12" have a percolation rate averaging 5 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 7132 inch perforations on the laterals. A Darwin 1300 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. Keep all heavy a ui ment off of the Droposed treatment areas before during and after construction_. The area around both sites must be fenced off by the contractor before any construction beams. 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. Garbage disposals are not recommended. Iron filters cannot go into this system. Additives must not be used they may cause harmful damage to your septic systern. It is recommended that you pump the septic tanks every two years. Sincerely, Joseph J. Olson 9 T8 \ \ \\ � \ r f —� r Y � ? ✓ KEVIEWPA K ✓ WAY I y �'-wen..„ — , • I 1 , �^ -� j� a r r l r f \ . \ f � r '� � M I III • 1 � ' \ i \ G H_Y„�\ 1 \ / o � �° o ?s �• 1 37 +5/ C � m I � } I }I I� p e +, 12 r r "' � Er. 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N/ 1 2011 purple code Mound Design wrovw.SepticResaurce.com (vers 15.2) Property Owner: Gonyea Homes Date: 12/6/2017 Site Address: 420 Lakeview Parkway PID: 0611723320096 Comments: Divert runoff coming toward system instructions: = = enter data = adjust if desired = computer calculated - DO NOT CHANGE=! i w bedroom Type Residential System 75fl GPD design flow 3) Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks 2250 Gal Septic tank (code minimum) 2250 Gal Septic tank (design size / LUG req'd) Tank options: none 5> 1 •Z GPD/ft2 mound sand Loading rate contour loading rate of 12 req's a min 62.5 ft. long rockbed h, 10.0 ft rockbed width 63.0 ft rockbed length 71 3.0 ft lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) end feed manifold connection slaterals 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) y 7/32 inch perfs at feet residual head gives fl.56 gpm flow rate per perforation for this perf size 8t spacing, 8 pipe size on line 12, max perfs/lateral = 30 line #8 must be less -•> OK n 4.0 doses per day (4 minimum) gallons per dose (treatment volume) 2.00 5x inti Z.00 inch diameter laterals must be used to meet 'Ax pipe volume" requirement 2.00 3x i_,) 25 feet of 2.0 inch supply tine leads to =4 gallons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 192 gallons TOTAL pump out volume (treatment + drainback) ifeet vertical lift from pump to mound laterals, leads to a: ir„ 36 GPM C 16 feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) 17) 750 gal Dose tank (code minimum) 1300 gal Dose tank (design size / LUG req'd) at aiflgpi leads to a psi 7.5 inch swing on Demand float, or timed dosing of5.3 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow}RIhrs OFF test and adjust as necessary) 19) 12 inches from bottom of tank to "Pump OFF" float 10, 20 inches from bottom of tank to "Pump ON" float, orF12 inches to "Timer ON" float if time dosed �i 23 inches from bottom of tank to "Hi Level" float, or 33 inches to "Hi Level" float if time dosed 714 gallons reserve capacity (after High Level Alarm is activated) 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 1 2.7 11 percent site slope (0-20% range) 11 (% downslope site slope, if different than upslope) 22 inches, or 1.8 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 EE]inches of 50% soil credit. Giving a: 14 inch, or 1.2 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONS!I! 7ft.Total ABSORPTION width (with sand beyond rockbed as follows:) s 0.0 ft. upslope and sideslope 17.D ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: upslope ratioT ft. upslope berm 3:1 sideslope ft, sideslope berms 4:1 downslope ft. downslope berm Overall Dimensions berm F birnitirig— Cvndi 10.0 ft. wide by 63.0 ft. long Rock bed 49 ft. wide by 89 1 ft. long Mound footprint 4" inspection pipe t--- 18" cover on top 9 1.2 Clean sand lift 1.8 Depth to Limiting AbsorDtion Width bean 1 30 12" cover on sides (6" loamy cap & 6" topsoil) 27.0---,��--_,_-,. `— Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >1%, Absorption Wldth is measured downhill from the upslope etre of the Bed Rock Bed: 10.0 ft, by 63.0 ft. by inches under pipe, plus 20% gives 21 yds 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) 19.6 up + 114.3 downslope +11.9 ends + 4D.1 under rock = 223 yds or "1.4= 312 ton plus 20% Loamy Cap: 45 ft. by 85 ft. 6" deep, plus 20% gives 6 Topsoil: 49 ft. by 89 ft. 6" deep, plus 20% gives I hereby certify that I have completed this work in accordance Rusty Olson"s Soil €t Perc esigner Signature Company =yd' or *1.4= 119 ton 97 yds or *1.4= 136 ton all applicable ordinances, rules and laws. 810 12/6/2017 License# Date Installer Summary 2250 gallon Septic tank (minimum) Tank options: none au7n Larger LdnK wiui rnuuipre corner ldnK5 1300 gallon Dose tank (minimum) at 25.49 gpi 36 GPM 16 ft. of head, Pump required 7.5 inch swing on Demand float which translates to roughly 4.8 inches of float tether length if time dosing is required --> 5.3 minutes ON time Et hours OFF time 20 inches from bottom of tank to "pump ON" float, or 12 inches to "timer ON" float 23 inches from bottom of tank to "Hi Level Alarm" or =inches to "Hi level alarm" if time dosed 25 ft, of 2.0 inch supply line with end feed ImanifoLd connection (Tip: "top feed" manifold to control drainback) 14 inch, or 1.2 ft. Sand Lift Mound 10.0 ft. wide by 63.0 ft. long Rock bed 3 laterals 2.00 inch diameter 61.0 ft. long 3.0 ft. lateral spacing 7/32 inch perfs 3.0 ft. perforation spacing Na Effluent filter Ft alarm 3 clean out Et valve box assemblies 27.0 ft.Total sand ABSORPTION width (minimum) 0.0 ft. upslope and sideslope (sand beyond rockbed, minimum) 17.0 ft. Downslope (sand beyond rockbed, minimum) Specific slope ratios give BERM widths (topsoil beyond rockbed) of: 4:1 upslope ratio9 ft. upslope berm 3:1 sideslope 13 ft, sideslope berms 4:1 downslope 1 0 ft. downslope berm Ur)slone berm 0 1.8 Limltin9 Condition 4" inspection pipe r— 18" cover on top 30 12" cover on sides (6" loamy cap & 6" topsoil) Clean sand lift Depth to Limiting,------------------ `— — - Absorption Width 27.0 -4_ `�-- ` -- — —_ Note: For 0 to 1% slopes, A,hsorption Width is measured from the Bedequally in both directions. For slopes >1%, ,Ahsorptfon Width is measured downhill from the upslope edge of the Bed Rock Bed: 21.0 yd3 or *1.4= 29 ton Mound Sand: 223 yd3 or *1.4= 312 ton Loamy Cap: 85 yd3 or *1.4= 119 ton Topsoil: 97 yd3 or *1.4= 136 ton inches under pipe calculation based on 3:1/4:1 slope from top of rockbei 6" deep 6" deep INSPECTOR CHECKLIST - mound 4LU LaKevlew F'arKway WELL 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 / BLUFF setback: 20' for bluff. Lakes: GD _, RD , NE Protected wetland . Iluilding setbacks: 10' for everything, 20' for dispersal area. WATER LINE under pressure sc 10' to bed,tank Et sewer line. (else sewer line > 12" below) 0 Sewer line Et baffle connection (no 90's, T between 45's, slope min 1" in 8', max T' 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 2250 gallons none Riser over outlet, riser over inlet or center, and 6"+ inspection pipe over any remaining baffles. No effluent filter Er alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) Mfg 1300 gallons I dose pump 36 gpm 16 head VERIFY PUMP CURVE 5.3 min ON 9 hr OFF float setting drop 7.5 inches at 25.5 gpi "DESIGNED" 4.8 inches approx float tether length 192.0 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 63.0 Sand lift depth 14 inches. (Jar test : 2" sand leaves < 1/8" silt after 30 min) Absorption Sand beyond rock 0.0 upslope Bermed topsoil beyond rockbed 9 upslope 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 7/32 inch perforations 3.0 ft perforation spacing 17.0 downslope 13 sideslope 30 downslope Air inlet at end of laterals, and at top feed manifold if necessary. clean outs (no hard 90's) 4" inspection pipe to bottom of rock, anchored VERIFY Abandon existing system - if necessary monitoring plan and type well abandonment form - if necessary VERIFY �Re-use existing tank certification 0 > E Lu E E V / Q. E N .i$ C. [� I se to v � "— I I � Logs of Soil Borings License #810 Location or Project: Lot 19, Blk 3 Borings made by: Rusty Olson's Soil and Perc testing 11/26/2013 Classification System: AASHO ; USDS• USDS-SCS X ; Unified ; Other Auger used (check two): Hand —X—, or Power , Flight, Bucket or Probe —X— Boring Number _1_ Surface elevation 955.6_ Mottled Soil at_2.6_feet 0""-18" Dark brown loam 1 Oyr3/2 H2O present at –X- 18"-32" Brown loam 10yr414 32"-42" Rusty brown loam 10yr5/4 Boring Number _2— Surface elevation 955.6_ Mottled Soil at 2.1 feet 0""-16" Dark brown loam 10yr3/2 H2O present at _X _ 1T-22" Brown loam 10yr4/4 22"-26" Brown loam 10yr5/4 26""-30" Rusty brown loam 10yr5/4 Boring Number _3_ Surface elevation 950.6_ Mottled Soil at _2.0 feet 0""-24" Dark brown loam 10yr3I1 H2O present at —X- 24"-20" Rusty dark brown loam 10yr3/2 Boring Number 4_ Surface elevation 950.6_ Mottled Soil at _1.8 feet 0"-22" Dark brown loam 10yr3/1 H2O present at _X_ 22°-30" Rusty dark brown loam 10yr312 Boring Number 5_ Surface elevation 949.5_ Mottled Soil at _1.5_ feet 0""-18" Dark brown loam 10yr3I1 H2O present at _X 18"-24" Rusty dark brown loam 10yr3/2 Boring Number 6— Surface elevation 953.3_ Mottled Soil at _2.1` feet 0-26" Dark brown loam 10yr4/2 H2O present at _X 26"-30" Rusty dark brown loam 10yr3/2 Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:45 A.M. On 11/26/13 Location: Lot 19, Block 3 Hole number: 1 Date hole was prepared: 11/25/13 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 of initial water filling 11/25/13 depth of initial water filling 12 incites 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 10:55 11:10 6" 3.0 5.0 11:17 11:32 6" 2.8 5.3 11:33 11:48 6" 2.7 5.5 AVERAGE PERC. RATE 5.3 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:45 A.M. On 11126/13 Location: Lot 19, Blk 3 Hole number: 2 Date hole was prepared: 11125113 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 10yr312 Method of scratching side wail: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11125113 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 10:56 11:11 6" 5.2 2.9 11:16 11:31 6" 5.0 3.0 11:34 11:49 6" 4.8 3.1 AVERAGE FERC. RATE 3.0 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:45 A.M. On 11/26/13 Location: Lot 19, Blk 3 Hole number: 3 Date hole was prepared: 11125/13 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 10yr311 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/25/13 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 10:57 11:12 6" 2.1 7.1 11:15 11:30 6" 2.0 7.5 11:35 11:50 6" 2.0 7.5 AVERAGE FERC. RATE 7.3 MPI Percolation Test Data Sheet Lic.#810 Percolating test readings made by: Rusty Olson's Perc. starting at 10:45 A.M. On 11/26/13 Location: Lot 19, Blk 3 Hole number: 4 Date hole was prepared: 11/25/13 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 10yr311 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Date of initial water filling 11/25/13 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 10:58 11:13 6" 4.5 3.3 11:14 11:29 6" 4.3 3.5 11:36 11:51 6" 4.2 3.6 AVERAGE FERC. RATE 3.5 MPI