HomeMy WebLinkAboutseptic design-general approval ����a c��� ����, ��
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CITY OF C2G":p
Joseph Olson D.B.A.
Rusty Olson's--Soil and Percolation Testing
Josep6 J.Olson--MPCA License#810
11481 Riverview Rd.NE,Hanover,MN 55341
(763)498-8779 Fax(763)498-8290
January 9,?017
Swanson Homes
725 Lakeview Parkway
Orono,Hennepin County
This on-site Sewage Treatment System is designed for a Type l,five-bedroom home in accordance with
the Minnesota Pollution Conrrol Agency Chapter 7080 and focal ordinances.
The periodically saturated soils were located at 16-24 inches(mottled soil).Due to the periodically
saturated soils,a pressurized mound system with 6 inches of rock will need to be installed to ueat the septic
el�luent.The bottom of the treatment area must be located at least 3'above the saturated soils.This system
is deslgned with 6 inches of rock
The soils at a depth of 12"have a percolation rate averaging 8.4 MPI.
All tanks need to be insulated if there is less than two feet of cover over the top of the[anks.Clean outs
must be installed on the end of tha laterals for maintenance.
Use 7r32 inch perforations on the laterals.
A 1300 gallon pumping chamber will need to be installed to lift the effluent ro the treatment azea.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.The manifold and supply line must have back drainage to the pumping chamber.
KCCD eIl IIE9W COuinment p(f Of tI1C DfODOterl trantmpnt o�nsQ be�ore d«
I�Q 8�d 8f[EI`Cnn�trurtin
The area around both sltes must be tenced oftbv t6e coetractor betore aev �nctrurfinn bes�;n�
With proper installation and maintenance,this system should have no problem in treating septic ef�luent
ett'tctively.Nothing other than gay water,(laundry,showers,etc.)Human water and toilet tissue should be
disposed of into the septic tanks.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 yean.
Sincerely.
��---
�/ % _--._--- .
`-_ `� Joseph 1.Olson
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2011purplscode Mound Design
www.SepticResource.com (vers 15.2)
Property Owner: Swanson Homes Date: t/912017
Site Address: 725 Lakeview Pxkway PID: 0611723340�Q8
Comments:
instructions: �•enter data �=ad just if desired �� computer calcutated•DO NOT CHANGE!
i� �bedroom Type � Residential System
�i �GPD design flow
a� Yes Garbage disposal or pumped to septic 50%larger tank with multiple comp/tanks
a� 2250 Gal Septic tank(code minimum} 2250 Gal Septic tank(design size/LUG req'd)
Tank options: none
s� 1•2 GPD/ft2 mound sand loading rate contour loading rete of 12 req's a min 62.5 ft.long rockbed
� 10.0 ft rockbed width b3.0 ft rakbed length
�� 3.0 ft laterat spacing 3.0 ft pe�foratlon spacing (maximum of 3 for both)
end feed manifold connection
8� �taterals 61.0 feet tong 21.0 perfs/laterat 63 perfs total
(1/2 a perf means the first perf starts at the middle feed manifold)
i 7/32 inch perfs at �feet residual head gives 0.56 gpm flow rate per perforation
for this perf size&spacing,&pipe size on line 12,max perfs/lateral= 30 ,line#8 must be less--> OK
io� 4.0 doses per day (4 minimum�
i i i 188 gallons per�se (treatment volume)
2.00 5x
i'i 2.00 inch diameter laterals mus[be used to meet"4x pipe volume"requirement
2.Q0 3x
i3i 142 feet of 2.0 inch suppty line leads to 24 gallons of drainback volume
(tip:"top feed"manifold to control the drainback)
w� 212 gallons TOTAL pump oui volume(treatment+drainback)
is� 15 feet verticat lift from pump to mound taterals,teads to a:
i�� 36 GPM @ 26 feet of head, Pump requirement (note:>50gpm may require an extra 3-6'of head
)
»� 750 gal Dose tank(code minimum) 1300 gal Dose tank(design size/LUG req'd) at 24.�49 gpi
leads to a
�s� 8.7 inch swing on Demand float, or timed dosing of 5.9 min ON (confirm pump rate with drawdown
(this delivers Average flow,=70%of Peak design flow)�9 hrs OFF test and adjust as necessary)
iv� 12 inches from bottom of tank to"Pump OFF'float
-o� 21 inches from bottom of tank to"Pump ON"ftoat,or 12 inches to"Timer ON"ftoat if time dosed
'i� 24 inches from bottom of tank to"Hi Level"float,or 34 inches to"Hi Levet"float if tlme dosed
��� 71Z galtons reserve capacity (after High Level Alarm is activated►
�a� 0.60 gpd/ftZ Absorption area Soil Loading Rate, which gives a mourtd ratio of� (minimum)
(this must match the soil boring log) desired mound ratio 2.0
=�i �8 percent site slope (0-20%range) �(�downsEope site slope,if different than upslope)
�si 16 inches, or 1.3 ft.to Redox or other Umiting condition (need at least 12"to be a Type i)
Treatment zone contains�inches of 0%soil credit,and Qinches of 50%soil credit. Giving a:
�ei 20 inch,or t J ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONS!!!
��� 20.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:)
'k� 0.0 ft. upslope and sideslope
10.0 ft.Downslope
Individual slope retios give BERM widths(topsoil beyond rockbed)of:
�c� 4:1 upslope ratio 11 ft.upslope berm
ao� 3:1 sideslope 13 ft.sideslope berms
i i 3:1 downslope 22 ft.downslope berm
a�� Overall Dimensions: 10.0 ft.wide by 63.0 ft. long Rock bed
43 ft.wide by 89 ft. long Mound footprint
4"inspectlon pipe
18"cover on top
U sto berm �� Downsio e berm 22
12"cover on sides
(6"bamy eap�6"topaoil}
�,� Clean sand lift
1.3 Depth ro Limitin�
___—
�
Lfmiting �;�,�dition —'�— .
_� __
Absor tion Wfdth 20.0 --
Note:
For 0 to 19K slopes, Abs�arption W1'd!h is measured from the BPo'equatly in both directions.
For slopes>1%, ,4bsorptlon WYdrh is measured downhit(from the upslope edge of the Beo!
33� Rock Bed:
10.0 ft.by 63.0 ft.by ��inches under pipe,plus 20%gives 21 yd'or'1.4= 29 ton
3a} Mound Sand: (note:volume is based on 3:1/4:1 slope from top of rockbed,Exchange sand for loamy cap if desired)
32.3 up � 73.0 downslope + 13.4 ends+ 48.2 under rock= 200 yd'or•1,4= Zgp ton
plus 20%
ssi loamy Gap:
39 ft.by 85 ft. 6"deep,plus 20A;gives 74 yd'or•1.4= 104 ton
3ei Topsoit:
43 ft.by 89 ft. 6"deep,plus 20%gives gb yd'or•1.4= 120 ton
1 hereby cer ify that I have completed this work in accordance with all applicable ordinances,rutes and taws.
��r Rusty olson's Soil&Perc 810 1/9/2017
igner Signature Company License/i Date
Installer Summary
2250 gallon Septic tank(minimum) Tank options: none
xrA�arsler �anK wnn rnuuipie cvrnpi�a�n�
1300 gatlon Dose tank(minimum) at 24.49 gpi
36 GPM(� 26 ft. of head, Pump required
8.7 inch swing on Demand float which translates to roughly 5.4 inches of float tether length
if time dosing is required•-> 5.9 minutes ON time& �hours OFF time
21 inches from bottom of tank to`pump ON"ftoat,ar 12 inches to'timer ON"ftoat
24 inches from bottom of tank to"Hi Level Atarm'or 34 inches to"Hi level atarm"if time dosed
142 ft, of 2.0 inch supply line with end feed manifotd cannection
(Tip:"top feed"manifold to control drainback)
20 inch,or 1.7 ft. Sand lift Mound
10.Q ft.wide by 63.0 ft. long Rxk bed
3 laterals 2.00 inch diameter 61.0 ft. long 3.0 ft. lateralspacing
7/32 Inch perts 3.0 ft. perforation spacing
No Effluent fllter 8 alarm
3 clean out 8 valve box assembties
20.0 ft.Total sand ABSORPTION width �minimum)
0.0 ft.upslope and sideslope (sand beyond rockbed,minimum)
10.0 ft.Downslope tsand beyond rockbed, minimumi
Specific stope ratios give BERM widths(topsoil beyond rockbed)of:
4:1 upslope ratio 11 ft.upstope berm
3:1 sideslope 13 ft.sideslope berms
3:1 downslope 22 ft.downslope berm
4"inspection pipe
18"cover on top
U o berm �� Dawnst berm 2t
-12"cover on sides
{6"loemy cap dc 6"toPaoin
1.7 Ctean sand lift
. 1_3 De�th ::> '_init�n�
Limit������ond�[ion - - -_ - -- - --- --.-
Absor tion Width zo.0 _ __ _. .._ _ .
Note•
For 0 to 1%stopes,,4ascv�ptton Nrydth is meawred from the Bedequalty in both directions.
For slopes>1%, .4bsorptlon H�dth is measured downMll from the upstope edge of the Bed.
Rock Bed: 21,p yd;or`1.4= 29 ton 6 inches under pipe
Mound Sand: 200 yd'or`1.4= 280 ton catculation based on 3:7/4:1 slope from top of rockbe�
Loamy Cap: 74 yd3 or"1.4= 104 ton 6"deep
Topsoil: 86 yd;or•1.4= 120 ton 6"deep
INSPECTOR CHECKLIST - mound
/LS Lakeview Narkway
� WEI.L setbac{:s: 20'to pressure tested sewer line (5 psi for 15 min►
50'to everything 100'to dispersal area with shallow welt
PRUPERTY LINES seiba�:k: 10'to everything
Roed se[back: platted: 10'prop line. Metes&bounds:out of road easement,or outer ditch.
LAKF,r BLUFF srrback: 20'for bluff. Lakes:GD_,RD_,NE_. Protected wetland
Building setbacks: 10'for everything, 20'for dispersal area.
WA"fER LINE under pressure sc 10'to bed,tank&sewer line. (else sewer line� 12"betow)
� Sewer line&baffte connection (no 90's, 3'between 45's, slope min t"in 8',max 2"in 8')
(no depth req's, clean out every tOQ', Sch 40 pipe�
� Septic tank and risers (water tight,insulated,proper depth,existing verified by pumping)
mf8 2250 gallons none
Riser over outtet, riser over inlet or center,and 6"+inspection pipe over any remaining baffles.
No effluent filter&alarm
Dose tank risers and piping (water tight,insutated,proper depth,drainback)
mfg 1300 gatlons
� dose pump 36 gpm 26 head VERIFY PUMP CURVE 5.9 min oN 9 hr OFF
� float setting drop 8.7 inches at 24.5 gpi "DESIGNED" 5.4 inches approx float tether length
212.0 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 40's)
2.0 inch supply pipe:Sch40, sloped t/8"+, supported by 4"sch40 sleeve or compacted, and buried 6"f.
sptice box/control panel/electrical connections
ftow measurement:CT,ETM,time dosed,home water meter
mound absorption area rough up
mound rock dimensions 10.0 X 63.0
Sand llft depth 20 inches. (Jar test:2"sand teaves< 1/8"sitt after 30 min)
� Absorption Sand beyond rock 0.0 upslope 10.0 downslope
� Bermed topspit beyond rakbed t t upslope 13 sideslope 22 downslope
cover depth of 12-18"+ VERIFY
3 laterels (t-2'from edge of rock)
2.00 inch pipe size (Sch40 pipe f�fittings)
3.0 ftlateratspacing
8 7/32 inch pertorations
3.0 ft perforation spacing
Air inlet at end of laterals, and at top feed manifold if necessary. VERIF7
ctean outs (no hard 90's)
4"inspection pipe to bottom of rock,anchored VERIFY
Abandon existing system-if necessary �Re-use existing tank certification
moNtoring ptan and type
well abandonment form •if necessary
Sysfiern Elevations l 1 ��""
benchmark �, r 1 _ _
- - SHWT
Mound r
(Grade e�vations are exisOng. If a ��mY�ap
different final grade is desired it should
be shown and described here.) ���
` bottom�ock
$tade ��I upsbpe rak 6ed►
_ SHWT �at upsiope roi k bed)
— ; 1 1 1 1 ---
,
� r � � r � I
r
sewer pipe
1 r r
exiting house Septic Tank Septic Tank �a apPacank� Pump Tank
Grade �rade Grade Grade
P�P� inlet idet inlet
Tank bottom TaMc bdtom Tank bottan
Loas of Soii Borinas
License#810
Location or P�oject:Lot20,bik 1
Borings made by: Rusty Olson's Soil and Perc testing 6N/2014
Classification System: AASHO ; USDS•USDSSCS_X_; Unified ;Other
Auger used(check two►:Hand_X,,or Power_,Flight,Bucket or Probe X
Boring Number_1_Surtace elevation_957.7 Mottled Soil at 2.0 feet
0"-8"Dark brown loam 10yr3l2 H20 present at_X_
8"-24"Brown loam 1Qyr414
24"-30"Rusty brown loam t 0yr5/4
Boring Number 2_Surface elevation_957.� Mottied Soil at_1.5_feet
0"-8"Dark brown loam 10yr3/2 H20 present at_X
8"-18"Brown loam 10yr4l4
18"-24"Rusty brown loam 1 QyrS/4
Boring Number_3_Surface elevation_956.4 Mottled Soil at t J feet
0"-8"Dark brown loam 10yr3l2 H20 present at X_
8"-12"Brown loam 10yr4/4
12"-20"Brown loam 10yr5/4
20"-28"Rusty brown loam 10yr5/4
8oring Number 4_Surtace elevation_956.4_ Mottled Soil at 1.8 feet
0"-12"Dark brown loam 10yr3/2 H20 present at X_
12"-22"Brown loam t0yr4/4 —
22"-28"Rusty brown loam 10yr5/4
Boring Number 5_Surface elevation_957.5 Mottled Soii at 1.3_feet
0"-8"Daric brown loam 10yr3/2 H20 present at_X_
8"-16"Brown loam 10yr5/4
16"-24"Rusty brown toam t0yr5/4
Boring Number 8_Surtace elevation_955.0 Mottled Soil at 1.8_feet
0"-12"Dark brown loam 10yr3/2 HZO present at X
12"-22"Brown loam 10yr4/4 — —
22"-28"Rusty brown loam 10yr5/4
Percolation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Olson's Perc.starting at 1:28 P.M.On 7/08/14
location: Lot 20.Blk 1
Hole number:4
Date hole was prepared 7I05/14
Depth of hole bottom_12",_inches,Diameter of hole_6"_inches.
Soil data from test hole:
Depth,inches Soil texture
0-10" Darlc brown loam 10yr3/2
10"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date of initial water filling 7/ /14 depth of initial water filling 12 i�ches
above hole bottom.
Method used to maintain at least 12 inches of water depth in hole for at least 4 hou►s Automatic Siphon
Maximum water depth above hole bottom during tests 6 inches
Time Time Depth Dro in H20 Pero Rate
1:49 2:04 6" 4.2 3.5
2:05 2:20 6" 4.1 3.6
2:27 2�42 6" 4.1 3.8
AVERAG PERC.RAT 3.6 MPI
Percolation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Olson's Perc.starting at 1:28 P.M,dn 7/06/14
Lacation: Lot 20,Blk 1
Hole number: 1
Date hole was prepared 7/OS/14
Depth of hole bottom_12"_inches,Diameter of hole_6"_inches.
Soii data from test hole:
Depth,inches Soil texture
0-8" Dark brown loam 10yr3/2
8"-12" Brown loam 10yrM4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date of initial water filling 7/ /14 depth of initial water filling 12 inches
above 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 A inches
ime Time Depth Qrop in H20 Perc Rate
1:46 2:01 6" 1.2 12.5
2:08 2:23 6" 1.2 12.5
2:24 2:39 6" 1.2 12.5
AVERAG PERC.RftTE 12.5 MPI
Percolation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Olson's Perc.starting at 1:26 P.M.On 7l06/14
Location: Lot 20.Bik 1
Hole numl�r:2
Date hole was prepared 7105/14
Depth of hole bottom_12"_inches,Diameter of hole_6"_inches.
Soil data from test hole:
Depth,inches Soil texture
0-8" Dark brown loam 10yr3/2
$"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inChes:
Date of initial water filling 7/OS/14 depth of initial water filling 12 inches
above 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 B inches
Time Time Depth Drop in H20 Perc Rate
1:47 2:02 6" 1.7 g g
2:07 2:22 8" 1.7 8.8
2:25 2:40 6" 1.7 8.8
AVERA E PERC.RATE g,g Mp�
Percofation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Oison's Perc.sta�iing at 1:28 P.M.On 7l08/14
Location: Lot 20,Bik 1
Hole number:3
Date hole was prepared 7/05/14
Depth of hole bottom_12"_inches,Diameter of hole_8",_inches.
Soil data from test hole:
Depth,inches Soil texture
0-8" Dark brown loam 1Qyr3/2
8"-�2" Brown loam 10yr4l4
Method of scratching side watl: Knife
Depth of gravel in bottom of hole 2 inches:
Date of initial water filling 7/ 5/14 depth of initial water filling 12 inches
above hole bottom.
Method used to maintain at least 12 inches of water depth in hote for at leasi 4 hours Automatic Siphon
Maximum water depth above hole botlom dunng tests 8 inches
Time Time Depth Drop in H20 Perc Rate
1:48 2:03 6" 1.7 8.8
2:06 221 6" 1.7 8.8
2:26 2:41 6" t.7 8.8
AVERAG PERC.RATE &.8 MPI