Loading...
HomeMy WebLinkAbout11-20-2017 Septic DesignJoseph Olson D.B.A. Rusty Olson's--'Soil and Percolation Testing Joseph J. Olson--MPC'A License 4810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 November 20, 2017 Gonyea Homes 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 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. The absorption areas of the two systems do not overlap. The soils at a depth of 12" have a percolation rate averaging 9.1 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 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 be ins. 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 system. It is recommended that you pump the septic tanks every two years. Sincere Joseph J. Olson 11/ - 15517 7 975. ' - � iy ss� � 1 s04 ,0 \ JL • e ! R 1 V 9F ag ti N 1 a A\,5� o 1 1 s 3IE ;T_ - BLOCK 95C '~ I Fi n -E Iv \ r.952 • 5 o LOT I s c tsc - nr �iya'J-51 0 �T'�1v.�s1 JO'�'�%� i 41c w ts+ssl a � l G !• � b sF / 944942 k I S69 OS sa"F 109.25 "1 Fig n v? ate, ro o ib ILd SC p rD o Ir a cu C5 01 CL w 2011 purple code Mound Design www.SepticResource.com (vers 15,2) Property Owner: Gonyea Homes Site Address: 765 Lakeview Parkway Comments: Date: 11/20/2017 PID: 0611723340010 instructions: = = enter data = adjust if desired = = computer calculated - DO NOT CHANGE! bedroom Type L I Residential System 750 GPD design flow Yes Garbage disposal or pumped to septic 50% larger tank with multiple comp/tanks 41 2250 Gal Septic tank (code minimum) 2250 Gal Septic tank (design size / LUG req'd) Tank options: none > 1.2 GPD/ft2 mound sand loading rate contour loading rate of 12 req's a min 62.5 ft. long rockbed 6) 10.0 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) laterals 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) 7/32 inch perfs at feet residual head gives 0.56 gpm flow rate per perforation for this perf size Et spacing, Et pipe size on line 12, max perfs/lateral = 30 line #8 must be less OK io, 4.0 doses per day (4 minimum) 1 1 r i88 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) 97 feet of 2.0 inch supply line leads to F 16 gallons of drainback volume (Tip: "top feed" manifold to control the drainback) 1.1) 204 gallons TOTAL pump out volume (treatment + drainback) l i 17 feet vertical lift from pump to mound laterals, leads to a: lbl 36 GPM @ 27 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 25.49 gpi Leads to a 18) 8.0 inch swing on Demand float, or timed dosing ofF5.7 min ON (confirm pump rate with drawdown (this delivers Average flow, =70% of Peak design flow)hrs OFF test and adjust as necessary) 19) [flinches inches from bottom of tank to "Pump OFF'" float ' 0 inches from bottom of tank to "Pump ON" float, or 12 inches to "Timer ON" float if time dosed ''�s 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) W 0.45 gpd/ftz 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 12 percent site slope (0-20% range) 12 (% 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 FOinches of 0% soil credit, and =inches of 50% soil credit. Giving a: 14 inch, or 1.2 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONSI!! 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) D.0 ft. upslope and sidesiope 17.0 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: 4:1 upslope ratio 9 ft. upslope berm 3;1 sideslope 13 ft. sidesiope berms 3:1 downslope 27 ft. downslope berm Overall Dimensions: 10.0 1 ft. wide by 63.0 ft. long Rock bed 46 ft. wide by 89 ft. long Mound footprint 4" inspection pipe 18" cover on tap U slope berm 1-9 L' Downslope herrn z7 1.2-]l Clean sand Lift _ _8 Limiting Conditior, Depth to Limiting Absorption Width 12" cover on sides (6`° loamy cap & 6" topsail) 27.0 —— -1— --- -- Note: For 0 to 1% slopes, Absorption width is measured from the 6edequatly in both directions. For slopes }1%, Absorption Width is measured downhill from the upslope edge of the Bed. Rock Bed: 10.0 ft. by 63.0 ft. by ©inches under pipe, plus 20% gives 21 yd' or X1.4= 29 ton ,.i Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 19.0 up + a1.fldownslope + 12.6 ends + 41.2 under rock =235 yd' or x'1.4= 329 ton plus 20% Loamy Cap: 42 ft. by 85 ft. 6" deep, plus 20% gives 88 yd' or *1.4= 123 tan 3(,j Topsoil: 46 ft. by 89 ft. 6" deep, plus 20% gives 91 yd' or "1.4= 127 ton I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. ry, Rusty Olson"s Soil Et Perc 810 11/20/2017 IfT6signer Signature Company License# Date Installer Summary 225D gallon Septic tank (minimum) Tank options: none Uub Ldfger LanK wiui nruaupLe cUrnpf LaFIKs 1300 gallon Dose tank (minimum) at 25,48 gpi 36 GPM @ 27 ft. of head, Pump required 8.0 inch swing on Demand float which translates to roughly 5.0 inches of float tether length if time dosing is required - 5.7 minutes ON time Ethours OFF time 20 inches from bottom of tank to "pump ON" float, or 12 Jinches to "timer ON" float 23 inches from bottom of tank to "Hi Level Alarm" or L 33 linches to "Hi level alarm" if time dosed 97 ft. of 2.0 inch supply line with end feed manifold 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 No 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 ratio 9 ft. upslope berm 3:1 sideslope 13 ft. sideslope berms 3:1 downslope 27 ft. downslope berm 4" inspection pipe 18" cover on top LJpslope berm 0 _l I. 1.2 11 Clean sand lift Downstope berm 27 12" cover on sides (6" loarny cap & 6" topsoil) _ _ _ Depth to Limiting l_imrting Conditaorl T— Absorption Width 27.0 ----- --------- Note: For 0 to 1% slopes, Absor tion Width is measured from the Bedequally in bath directions. For slopes >1 %, A.hsorptfoI7 Width is measured downhill from the upslope edge of the Bed. Rock Bed: 21.0 Yd3 or *11.4= 24 ton Mound Sand: 235 yd3or*1.4= 329 ton Loamy Cap: 88 yd' or *1.4= 123 ton Topsoil: 91 103 or *1.4= 127 ton 6 inches under pipe calculation based on 3:1/4:1 slope from top of rockbe, 6" deep 6" deep INSPECTOR CHECKLIST - mound /65 Lakeview Parkway WE,I.L 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 Ft bounds: out of road easement, or outer ditch. ],AIE / BLUFF setback: 20' for bluff, Lakes: GD —, RD _, NE Protected wetland Building setbacks: 10' for everything, 20' for dispersal area. WATER LINE under pressure st 10' to bed,tank Et sewer line. (else sewer line > 12" below) ElSewer line fx baffle connection (no 90's, 3' between 45's, slope min 1" in 8', max 2" in 8') (no depth req's, clean out every 100', Sch 40 pipe) F1Septic 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 Et alarm Dose tank risers and piping (water tight, insulated, proper depth, drainback) mfg 1300 gallons El dose pump 36 gpm 27 head VERIFY PUMP CURVE 5.7 min ON 9 hr OFF float setting drop 8.0 inches at 25.5 gpi "DESIGNED" 5.0 inches approx float tether length 204.0 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 118"+, 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 17.0 downslope ElBermed topsoil beyond rockbed 9 upslope 13 sideslope 27 downslope 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 H7/32 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 plan and type well abandonment form • if necessary � loq � ]F;;:� E k CL E � � � � � � 2 � — �cu � R E . � 2 � � 2 § � 2 © ow c k w : 2 2 Ln 2 2 � loq � ]F;;:� E k CL E � 2 2 b � � � | � R E � 2 � w : 2 2 b & Lx § � | � � & Lx § Soil Observation Log w1vw.SepticResource.com vers 12.4 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 mads: ❑r Till ❑ Outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ summit ❑ Shoulder 0 Side slope ❑ Toe slope soil survey map units: L41 C2 slope 12-15 % direction- Linear -concave Soil Log 91 ❑� Boring 0 Pit Elevation 949.0 Depth to SHWT 22 Inches Depth (in) Texture fragment % tnatrix color redox color consistence grade shape ()-12 Topsoil <35 10yr3/1 Loose Moderate Blocky 12-22 Loam <35 1Oyr4/3 Friable Strong Block} 22-30 Clay Loam <35 1Oyr5/4 I Oy4/8,1-6/1Oy Friable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firrn moderate prismatic platy rigid strong massive `35 loose loose single grain 35 - 50 friable weak granular block% >50 firm moderate prismatic plat rigidstrong massive Comments: ######## Soil Log #2 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 1Oyr3/l Loose Moderate Blocky 5-14 Sandy Loam <35 1Oyr4.3 Friable Strong Blocky 14-24 Sandy clay Loam <35 l Oyr5/4 Friable Strong Blocky 24-30 Sandy Loam 5 101x` 3 l Oy4/8,1-6/1Oy Friable Strong Block% 765 Lakeview Parkway Soil Log #3 ❑� Boring Q 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/l Loose Moderate Blocky 10-16 Sandy Loam <35 10yr4/3 Friable Strong Blocky 16-20 Sandy clay Loam <35 1Oyr5/4 Friable Strong stocky 20-26 Sandy clay Loam <35 10yr5/3 1 Oy4/8,1-6/1 Oy Friable Strong Blocky I hereby certify thi ork was completed in accordance with MN 7080 and any local reqs. Rusty Olson's Soil & Perc. 810 D rgrier Signature Company License # 765 Lakeview Parkway Soil Lag #4 ❑� Boring F1 Fit Elevation 946.1 Depth to SHWT 22 Inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-6 Topsoil <35 1Oyr3/2 Loose Moderate BleckN 6-12 I.omib ,; 1Oyr4/3 Friable Strong BIo':k. 12-22 Clay Loam <35 10".1" 4 Friable Strong 13k)6% 22-30 Clay Loam -; ; IOyr6/4 I Oy4/8,1-6/1 Oy Friable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive 765 Lakeview Parkway Soil Log #5 0 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 1Oyr5/4 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 weak eranular blocky >- firm moderate prismatic platy rigid strong massive I hereby cent' is work was completed in accordance with MN 7080 and any local reqs. Rusty ©lson's Sail & Perc. 810 esigner Signature Company License # Soil Observation Log www.SepticResource.com kers 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: ❑ Till ❑ Outwash ❑ Lacustrine ❑ Alluvium ❑ Organic ❑ Bedrock landscape position: ❑ summit ❑ Shoulder ❑ Side slope E Toe slope soil survey map units: L41 C2 slope 12-15 % direction- Linear -concave Soil Log #6 ❑ Boring ❑ Pit Elevation 949.0 Depth to SHWT 20 Inches Depth (in) Texture fragment % matrix color redox color consistence grade shape 0-8 Topsoil <35 10yr3/2 Loose Moderate Blocky S-14 Loam <35 10yr4/3 Friable Strong Blocky 1_l-�() Clay Loam <3.5 10yr5/4 Friable Strong 20-26 Clay Loam <35 1Oyr4!4 IOy4/8,1-6/1fly Friable Strong Blocky <35 loose loose single grain 35-50 friable weak granular blocky >50 firm moderate prismatic platy rigid strong massive Comments; 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 Topsoil 10yr311 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 Pere 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 Pere. starting at 12:35 P.M. On 11/18/17 Location: 765 Lakeview Parkway Hole number: 2 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 0-8 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 11/18/17 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 10yr311 10-12 Loam 10yr413 Method of scratching side wall: Knife Depth of gravel in bottom of hole 2 inches: Dae 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 Olson's Perc. starting at 12:35 P.M. On 11/18/17 Location: 765 Lakeview Parkway Hole 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 10yr4l3 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 12:48 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