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HomeMy WebLinkAbout07-25-2018 Septic Design`11 E n d e- P cc r v j ce. INDIVIDUAL SEWAGE SYSTEM DESIGN SUMMARY Property Owner: Rick Prendergast Phone: 612-916-8763 Address: 730 Gander Rd. Township: City: Wayzata Zip: 55391 County: Hennepin County DESIGN USAGE Single Family Home 5 Other Number of Potential Bedrooms SITE CHARACTERISTICS Soil type Clay Loam Hydraulic Loading .45 Garbage Disposal _ yes Depth to restrictive layer 20 inches Sewage Lift Pump yes PUMP INFORMATION CAPACITIES Pump GPM & TDH 47 gpm and 24 tdh Daily Water Use Est Calc 750 Cycles per day 4 cycles Septic Tank Capacity 2-1250 gallon tanks -to be installed Gallons per cycle 188 gallons Pump Tank Capacity 1250 gallon tank -to be installed Perforation size & spacing 't. " per& eya 3 feet MOi Number, spacing, & diameter of laterals 3-2 inch laterals every 3 feet Dimension of Rock Base Mound Materials Amount of Rock 29 tons Amount of Mound sand Amount of loamy cap Amount of topsoil Lineal Feet supply line Lineal Feet Main Line 10x62.5 Depth of Rock Below Pipe 6 inches Dimensions of Mound 44x97 % Slope of Soil Under Mound 8% 296 tons Upslope Dike Width 116 tons Downslope Dike Width 133 tons Sideslope Dike Width 100 ft. 60 & 10 feet 24 feet 17 feet 5 Bedroom �Z —'� APPROVAL 10 X 62.5 Rockbed By�� Date 11/27/2017 47 GPM See additional information sheet if checked Z 24 # TDH City of Orono Septic Plan Review 1 1250 Pump Tank Reviewer: 2-1250 Septic Tanks All work shall be done in fuel compliance with all applicable septic and zoning code. 24910 Territorial Road • Rogers, MN 55374 76342811489 • www.endeseRtic.com • info@endeseptic.com Septic System Design Additional Information Property Address: 730 Gander Rd. Wavzata, MN Description of Waste Water Treatment System This site is an existing home with a failed septic system due to soil separation. The existing tanks will need to be pumped, crushed and abandoned. Two 1250 gallon septic tanks will be installed for septic capacity. A 1250 gallon tank will be installed to be used as a lift station to the proposed mound. The proposed mound to be built will consist of a 10x62.5 rockbed with a 1.3 `foot sand lift. A flow measurement device must be installed on the pump tank. There are a handful of trees in the absorption and mound area that will need to be cut down. These trees should be cut down as dose to the surface as possible while leaving the stump in the ground. This new on-site sewage treatment system is designed for a 5 bedroom home, Type 1 system in accordance with the MPCA Chapter 7080 and local ordinances. The soils on this site are loamy to clay loam. The periodically saturated soils were located after going to a depth of 20 inches. This will lead 20 inches of usable soil underneath the mound with a 1.3 foot sand lift. Therefore providing a 36 inch separation for the treatment of effluent above the periodically saturated soils. 2-1250 gallon tank will need to be installed along with a 1250 gallon pump tank to lift the sewage to the treatment area. The power supply and switches must be located outside the manhole and pumping chamber in a weather proof enclosure. A warning device must also be installed with audio/visual alerts. The supply line mast have drain back to the pumping chamber. From the pump tank sewage will be pumped approximately 100 feet to the mound. There will be 3- 2" pipes each 3 feet apart inside the 10' by 62.5' rockbed. The mound will have a total footprint of 44' by 97' with 8 percent slope underneath it. All tank manholes should be brought to grade upon completion of tank installation, inspection ports for the distribution boxes should also be at grade upon completion. Keep all vehicles and construction equipment off septic area. Rutting and/or compacting the soil will change the percolation rates and may lead to system failure. Homeowner to verify all property lines. Elevations are referenced to Bench Mark on the tar in front of the garage. Installer to verify all elevations, dimensions, and ensure proper fall to pipes. Pitch pump chamber outlet to ensure complete drain back to pump chamber. Establish turf to prevent erosion and freezing. Ends Septic Service, LLC, 24910 Territorial Road l ph.763-428-4489 or info(o)endeseptic.com 1 Each tank is to be pumped through the maintenance cover when serviced. Do not pump through inspection pipes. Homeowner is responsible for all costs involved in servicing, monitoring, and mitigating the system. All construction to be performed in accordance with MN Rule 7080 Nothing other than human waste, toilet tissue, laundry, showers, water softener etc. should be disposed of into the septic tank. Recommend iron filters be diverted out of the system. Recommended to divert the water softener as well. Garbage disposals are no recommend, due to adding more solids and fine solids passing through the system. Excessive amounts of soap, antibacterial soaps, cleaning agent, showers, cleaners used every shower and chlorine agents may kill the bacteria needed to treat septic effluent. Additives are not recommended. Recommend laundering be limited to 3 loads per day. Maintenance Requirements See attached operating permit or management plan for details Ende Septic Service, LLC, 24910 Territorial Road[ ph.763-428-4489 or info(a)endeseptic.coin 2 2011 purple code Mound Design www.SepticResource,com (vers 15.2) Property Owner: Rick Prendergast Date: 11/27/2017 Site Address: 730 Gander Rd. PID 04-117-23-43-0021 Comments: tions: = = enter data = adjust if desired = = computer calculated - DO NOT CHANGE! =bedroom Type L�J Residential System 750 GPD design flow Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks 2250 Gal Septic tank (code minimum) 2500 Gal Septic tank (design size / LUG req'd) Tank options: Multiple tanks or compartments req'd 1.2 GPD/ft2 mound sand loading rate contour loading rate of F2 req's a min r 62.5 ft. long rockbed 10.0 ft rockbed width b2.5 ft rockbed length 3.0 ft Lateral spacing 3.0 ft perforation spacing (maximum of 3 for both) end feed manifold connection laterals F 60.5 feet long 21.0 perfs / lateral 63 perfs total (112 a pert means the first pert starts at the middle feed manifold) 1 /4" inch perfs at =feet residual head gives 0.74 gpm flow rate per perforation for this perf size l3 spacing, 8 pipe size on line 12, max perfs/lateral = 25 line #8 must be less o) 4.0 doses per day ( 4 minimum) 1) 188 gallons per dose (treatment volume) 2.00 5x 12)200 inch diameter laterals must be used to meet "4x pipe volume" requirement 2.00 3x 131 100 Teet of 2.fl inch supply line leads to 17 Igattons of drainback volume (Tip: "top feed" manifold to control the drainback) 14) 205 gallons TOTAL pump out volume (treatment + drainback) i5) 12 feet vertical lift from pump to mound laterals, leads to a: t6) 1 47 JGPM =feet of head, Pump requirement (note: >50gpm may require an extra 3-6' of head) 17i 750 gal Dose tank (code minimum) 1250 gal Dose tank (design size / LUG req'd) at 23.00 gpi leads to a 18) F 8.9 inch swing on Demand float, or timed dosing of4.4 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow) 9 hrs OFF test and adjust as necessary) 19) 16 inches from bottom of tank to "Pump OFF' float 20) 25 inches from bottom of tank to "Pump ON" float, or1inches to "Timer ON" float if time dosed 2i) 28 inches from bottom of tank to "Hi Level' float, or F38qinches to "Hi Level" float if time dosed 606 gallons reserve capacity (after High Level Alarm is activated) 0.45 gpd/ft2 Absorption area Soil Loading Rate, which gives a mound ratio of F 2.7 (minimum) (this must match the soil boring log) desired mound ratio r 2.7 percent site slope (0-20% range) F8 (% downslope site slope, if different than upslope) 20 inches, or 1.7 ft. to Redox or other limiting condition (need at least 12" to be a Type I) Treatment zone contains=0 inches of 0% soil credit, and =0 inches of 50% soil credit. Giving a: --]inch, or 1.3 ft. Sand Lift Mound CRITICAL FOR FUTURE CERT1FICATIONSHI 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 8 0.0 ft. upslope and sidesLope 17.0 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: y) 4:1 upslope ratio 10 ft. upslope berm o� 4:1 sideslope 17 ft. sideslope berms i) 4:1 downstope 24 ft. downslope berm 2) Overall Dimensions UDslooe bene 10.0 1 ft, wide by F62.51 ft. Long Rock bed 44 ft. wide by 97 ft. long Mound footprint 4" inspection pipe 18" cover on top 1� J 1� 1. DownslODe berm 24 12" cover on sides (6" loamy cap & 6" topsoil) J 1.3I Clean sand lift 1.7 Depth to Limiting i_:anitifig Condition - __--____ Absoration Width f 27.0 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 tlpstope edge of the Bed Rock Bed: FEET t- by 62.5 lift. by inches under pipe, plus 20% gives 21 yd' or "1.4=29 ton Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 27.0 up + 94.6 downslope + 14.5 ends + 40.1 junder rock = 212 yd3 or "1.4= F296 ton plus 20% Loamy Cap: ®ft. by =ft. 6" deep, plus 20% gives U,; Topsoil: =yd' or *1.4= =ton =ft. by =ft, 6" deep, plus 20% gives 95 yd' or "1.4= =ton I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and taws. Ende Septic Service C9206 11/27/2017 signer Signature Company License# Date Installer Summary 2500 gallon Septic tank (minimum) Tank options: Multiple tanks or compartments req'd JVib td gef LdI IK wltll II0.RUIJle UJlf 1p/ talfRS 1250 Batton Dose tank (minimum) at 23.00 Bpi 47 GPM @=ft. of head, Pump required 8.9 inch swing on Demand float which translates to roughly 5.5 inches of float tether length if time dosing is required --> 4.4 minutes ON time li =hours OFF time 25 inches from bottom of tank to "pump ON" float, or 16 inches to 'timer ON" float 28 inches from bottom of tank to "Hi Level Alarm" or 38 inches to "Hi level alarm" if time dosed UJrt. or 1 z.0 E3ncn supply Lin( witnlena Teea )mamrora connection (Tip: "top feed" manifold to control drainback) 16 inch, of 1.3 ft. Sand Lift Mound 10.0 ft. wide by 62.5 ft, long Rock bed 3 laterals 2.00 inch diameter 60.5 ft. long 3.0 ft. Lateral spacing 114" inch perfs 3.0 ft. perforation spacing. No Effluent filter Et alarm 3clean out & valve box assemblies 27.9 ft.Total sand ABSORPTION width (minimum) O.fl 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 ratio 10 ft. upslope berm ±Hdownstope sideslope 17 ft. sidestope berms 1 24 Ift. downslope berm 4" inspection pipe 18" cover on top UDStme berm =_i I . 1.3 11 Clean sand lift 1.7 Depth to Limiting Limiting Condition Absorption width DownsloDe berm = 12" cover on sides (6" loamy cap 8a 6" topsoil) Note: For 0 to 1% slopes, Absorption Width is measured from the Bedequally in both directions. For scopes >1%, Absnrpti©o Width is measured downhill from the upslope edge of the Bed Rock Bed: 21.0 yd3 or "1.4= 29 ton 6 inches under pipe Mound Sand: 212 yd3 or *1.4= 296 ton calculation based on 3:1/4:1 slope from top of rockb€ Loamy Cap: 83 yd3 or "1.4= 116 ton 6" deep Topsoil: 95 yd3 or "1.4= 133 ton 6" deep INSPECTOR CHECKLIST - mound tju wander tca. 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 tine. 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 s+ 10' to bed,tank & sewer line. (else sewer line > 12" below) Sewer tine Et baffle connection (no 90's, Y between 45s, slope min 1" in 8', man 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 2500 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 & alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) mfg- __ _ _ 1250 gallons ❑ dose pump 47 gpm 24 head VERIFY PUMP CURVE 4.4 min ON 9 hr OFF float setting drop 8.9 inches at 23.0 gpi "DESIGNED" 5.5 inches approx float tether length 205.0 gat dose divided by gpi -INSTALLED" ■ inches float drop (field correctec LABEL pump requirements and drawdown on riser or panel Cam lock reachable from grade - 30" max. J -hook weep hole. Supply line access (no harts Ws) 2.0 inch supply pipe: Sch40, sloped 1/8"+, supported by 4" sch40 steeve 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 62.5 Sand lift depth 16 inches. (Jar test : 2" sand leaves < 1/8" sitt after 30 min) Absorption Sand beyond rock 0.0 upsiope 17.0 downslope Bermed topsoil beyond rockbed 10 upstope 17 sidieslope 24 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 1/4" inch perforations 3.0 €t perforation spacing Air inlet at end of laterals, and at top feed manifold if necessary. VERIFY clean outs (no hard Ws) 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 Soil Observation Log www.SepticResource.com vers 12.4 Owner Information Owner / project: Rick Prendergast Elate 11/27/2017 Address / PID: 730 Gander Rd. Soil Survey Information Q rerer to attxt ed soli survey Parent mat's: ❑Till ❑outwwash ❑Lacuse;ne ❑Atluwum ❑organic ❑Wrack landscape position: []Summit QShoulder Side slope []Toe slope soil survey map units: 122C2 slope 8 % direction- downhill Soil Log #1 Boring ❑ Pit Elevation Depth to SHWT 231' Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-14 loam <35 IOYR3/2 Friable Weak Blocky 14-23 clay loam <35 IOYR3/6 Friable Moderate Blocky 23-30 clay loam <35 10YR3/6 5yr5/8 Friable Moderate Blocky 24-30 clay loath <35 10YR3/6 5YR5/8 loose loose single grain 35-50 friable weak granular blocky 35-50 firm 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 mauve Comments: 730 Gander Rd. Soil Log #2 ❑Q Boring ❑Pit Elevation Depth to SHWT 24" Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-15 loam <35 IOYR3/2 Friable Weak Blocky 15-20 clay loam <35 1OYR4/6 Friable Moderate Blocky 20-24 clay loam <35 I OYR3/6 Friable Moderate Blocky 24-30 clay loath <35 10YR3/6 5YR5/8 Friable Moderate Blocky <35 loose loose single grain 35-50 friable weak granular blocky firm moderate Prismatic platy >50 ri ngca Istrong " 730 Gander Rd. Soil Log #3 Q Boring ❑ Pit Elevation Depth to SHWT 23" Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-18 loam <35 10YR3/2 Friable Weak Blocky 18-23 clay loam <35 10YR4/6 Friable Moderate Blocky 23-30 clay loam <35 10YR4/6 5YR5/8 Friable Loose Blocky <35 loose loose single grain 35-50 friable weak granular blocky firm moderate prismatic platy >50 rigid strong rr�ve <35 loose loose su4e grain 35-50 &fable weak gramilar blocky firm moderate prisnabc platy >50 rigid strong r"ai`e I hereby certify this work was completed in accordance with MN 7080 and any local reqs. . __�z Ende Septic Service D igner Signature Company C9206 License # Preliminary & Field Evaluation Form www.SepticResource.com vers 12.4 - Owner Information Date 11/2712017 Sec / Twp / Rng Parcel ID 04-117-23-43-0021 LUG (county, city, township) City of Orono Property Owner: Rick Prendergast Owners address (if different) Property Address: 730 Gander Rd. City / State / Zip: Wayzata, INN I Flow Information and Waste Tvne / Strength I Estimated Design flow 750 Anticipated Waste strength ❑ Hi Strength ❑ Domestic Any Non -Domestic Waste ❑ Yes (class V) ❑ No Comments: Sewage ejector/grinder pump 10 Yes ❑ No Water softener i21 Yes ❑ No Garbage Disposal ® Yes 0 No Daycare / In home business ❑ Yes ED No Soil Information Site Information Evidence of site: Existing & proposer! lot ❑ Yes ❑ No Well casing depth 120' ❑ Yes improvements located (see site map) Compacted ❑ Yes ❑Q No Disturbed ❑ Yes Easements on lot located 0 Yes ❑ No Drainfield w/in 100' of ❑ Yes No (see site map) residential well Property lines determined ❑ Yes ❑ No Site w/in 200' of transient ❑ Yes ❑ No (see site map) noncommunity water supply (TNCWS) iteq'd setbacks determined 0 Yes ❑ No Site Win an inner wellhead ❑ Yes Q No (see site map) mgmt zone (CWS/NTNCWS) Utilities located & identified Q Yes ❑ No Buried water supply pipe ❑ Yes Q No (gopher state one call) w/in 50' of system Access for system maintenance ❑ Yes ❑ No Site located in Shoreland ❑ Yes ❑ No (shown on site map) (w/in 1000' of lake, 300' of river) Soil treatment area protected ❑ Yes ❑ No Site map prepared with ❑✓ Yes ❑ No previous items included Construction related issues Soil Information Evidence of site: Cut ❑ Yes Q No Filled ❑ Yes ❑ No Compacted ❑ Yes ❑Q No Disturbed ❑ Yes Q No Original soils 0 Yes ❑ No Soil logs completed and attached 0 Yes ❑ No Soil loading rate (U&ft2) Depth/elev to SHWT Depth to system bottom maximum (or elev minimum) Depth/elev to standing water (if applicable) Deoth/elev to bedrock Survey information 0.45 20.00 -16.00 n/a Perk test completed and ❑ Yes ❑ No attached (if applicable) Percolation rate (if applicable) n/a Flooding or run-on potential ❑ Yes No (comments) Flood elevation (if applicable) n/a Elevation of ordinary high n1a water level (if applicable) Na Floodplain designation and Q Yes ❑ No elev - 100 yr/10 yr (if applicable) n/a (see attachment) Differences between soil survey and field evaluation (if applicable) I hereby certify this evaluation was completed in accordance with MN 7080 and any local reqs. 7� Ende Septic Service C9206 igner Signature Company License # 50 rAmin WOODED AREA `Prop n Sep%c Tanks GaYon SePOc ranks TUU? PiopO"d W Proposed 1250 Supply tins moa Pump Tank ELEVATIONS: BM -100.0 NE CORNER OF ROCKBED-96.3 NW CORNER OF ROCKBED696.3 SE CORNER OF ROCKBED- 95.6 SW CORNER OF ROCKBED-95.6 BOTTOM OF ROCKBED- 98.0 GRADE OF EXISTING TANK -98.5 INLET OF EXISTING TANK -95.7 GRADE OF 1 ST PROPOSED SEPTIC TANK -98.3 ESTIMATED INLET -95.5 GRADE OF PROPOSED PUMP TANK -97.9 ESTIMATED OUTLET -94.9