HomeMy WebLinkAboutSubdivision Only - Soil and Percolation Testing � Y
Rusty Olson's--Soil and Percolation Testing
Joseph J. Olson--MPCA License #810
11481 Riverview Rd. NE, Hanover, MN 55341
(763) 498-8779 fax (763) 498-8290
February 20,2007 =STEM ISflEUM FN ORONO COPY
Kem Hoppe 5— KQRQQK ANY M(W M NUMBER
Proposed subdivision of OF KORM IWAUDATU THIS DMGN,
1150 Wyndemere Road
Orono,Hennepin County
This on-site Sewage Treatment System is partially designed for a Type 1,five-bedroom home in accordance
with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances.
Once the house size,location and septic primary and future sites are chosen this design can be completed.
The seasonally saturated soils were located at 14"-22"(mottled soil). Due to the seasonally saturated soils,
a pressurized Mound System will need to be installed to treat septic effluent. The bottom of the treatment
area must be located at least 3'above the saturated soils.
The soils at a depth of 12"have a percolation rate averaging 14 MPI.
A 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 a light and sound device;this is in case of a pump failure.
Keep all heavy equipment off of the proposed treatment areas before and after construction. The
treatment area must be fenced off before construction begins. This Design Is not valid&the System
will need to be relocated if failure to protect the areas proposed for the On-Site Sewage Treatment
systems occurs.
Nothing other than gray water,(laundry,showers,ect.)human water&toilet tissue should be disposed of
into the septic tanks. Garbage disposals are not recommended. Additives must no be used,they may cause
harmful damage to your septic system. It is recommended that you pump the septic tank every year for 1
tank,every two years for two tanks.
Sincerely, Cox,ONO COPY` Ct'TY OF ORONO
SIM 116 PFR PI&AN �$
RATE PERMIT NCS
AS Joseph J.Olson ff_j.,=APD WIT�OORItBCrtOti>i IK pol
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University of Minnesota Mound Design Worksheet
joraW-than 1%Slopes
A. FLOW
Estimated 750 9Pd(see figure A-1)
or measured I x 1.5(safely factor)= 0 9pd
& SEPTIC TANK LIQUID VOLUMES
Septic tank qty 3000 gallons(see figure G1)
Nuniber of tanks/oompartrnents 0
Eff m t Filter (yeslno) yea
C-1 Sgft Tank Cqmxty In Gdbm
Neer of Minimum Capacity with lCapacity with
Bedroorns Capacity Garb.Disp. Disp.and Lift
or less 1125
3 or 4 1500
5 or 6 2250
7,8 or 9 3000
C. SOILS(Slfe evaluation data)
1. Depth to restricting layer= 1.1 feet
2. Depth of percolation tests= 12 inches
3. Texture loam
4. Sol loading rate(see Figure D-33) 0.60 9pd/ft'
Percolation rate 14 MPI
5. %Land Slope 4.0 %
0. ROCK LAYER DIMENSIONS
1. Multiply average design flow(A)by 0.83 to obtain required area of rock layer.hem A x OM--
750
.83=750 gpd x 0.83 fe/gpd= 630 ft'
2. Determine rock layer width =0.83 ft`/gpd x Linear Loading Rhe(LLR)(see LLR chart
0.83 ft2/gpd x 12.00 = 10.0 ft
LLR Chart
Perk Rate LLR
<120 MPI <=12
>=120 MPI <=6
3. Length of rock layer=area divided by width=
630.0 ft2 I 10.0 feet= 63.0 ft
E. ROCK VOLUME
1. Multiply rock area by rock depth to get cubic feet of rock
630.0 X 1.0 ft= 630.0 ft3
2. Divide ft3 by 27 ft3/yd3 to get cubic yards
630.0 ft3 / 27 = 23.3 yd'
3. Multiply cubic yards by 1.4 to get weight of rock in tons;
23.3 yd3 X 1.4 ton/yd3 = 32.7 tons
Page 1 of 5 ,: ,`y'°
F. ABSORPTION WIDTH Absorption ratio: r 2
1. Absorption width eWals absorption ratio times rock layer width Site A
2.00 x 10.0 ft = 20.0 It
G. MOUND SLOPE WIDTH&LENGTH(Greater than 1%)
1. Downslope absorption width=absorption width minus rock layer width
20.0 feet - 10.0 feet= 10.0 It
2. mound size
UPSLOPE
a.Depth of dean sand at upslope edge of rock layer-3 feat minus distance to restricting layer(C1)
3.0 It - 1.1 ft= 1.9 ft
b.Mound height at the upslope edge of rock layer=depth of dean sand for separation(G2a)
at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot)
1.9 ft+lft+1 ft= 3.9 ft
c.Upslope berm multiplier based on land slope(see figure D-34)
Selected berm multipHer: 3.33
d.Upslope width=berm muItIpWG2c)times upslope mound helght(G2b):
3.33 x 3.9 ft = 13.0 ft
DOWNSLOPE
e.Drop In elevation=rock layer width(132)times percent landslope(C5)1100
10.0 ft x 4.0 % /100= 0.4 It
f.Downslope mound height=depth of death sand for slope difference(G2e)
at downslope rock edge phi the mound height at the upslope edge of rock layer(2b)
0.4 ft + 3.9 ft= 4.3 It
g.Downslope berm multiplier based on percent land slope(see Figure D-34
Selected berm multiplier. 4.76
h.Downslope width=downslope mwitiplier(G2g)times downslope mound heighaG2Q
4.76 x 4.3 = 20.5 It
I.Select gmater of G1 and G211 as the downslope width 20.5 ft
j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2I)
13.0 ft+ 10.0 ft+ 20.5 ft= 43.5 It
k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)plus upslope width(G2d)
13.0 ft + 63.0 ft+ 13.0 ft= 89.0 ft
Final Dimensions (slope>1%) 43.5 It x 89.0 It
I hereby certify that all work has been completed in accordance with all applicable ordinances,rules&laws.
(signature) 810(license#) 212012007(date)
Page 2 of 5
H. SAND VOLUME
1. Upslope Volume+ Volume under rodcbed+Downslope Volume Ste A
a.Upslope Volume:(depth of dean sand+1)x(upslope berm) x(mound length)/2=ft'
2.9 ft x 13.0 ft x 89.0 ft /2 = 1677.7 ft3
b.Volume under rodcbed: (average depth of sand under rock)x(rockbed width)x(mound length)=ft
2.1 ft x 10.0 ft x 89.0 ft = 1869.0 ft3
c.Downslope Volume: (depth of dean sand+1)x(downslope berm)x(mound length)/2=ft3
3.3 j ft x 20.5 ft x 89.0 ! It / 2 = 3010.4 ft3
Total cubic feet:i = 6557.1 fe
2. Divide ft3 by 271t3/yd3 to get cubic yards
6557.1 /27 = 242.9 yds'
3. Multiply cubic yards by 1.4 to get weight of sand in tons
242.9 yds''1.4 340.0 tons
4 Add 10%for Constructability
340.0 tons x 1.1= 374.0 tons
A•1 E+ ed Saw p Flows In GPD
No.of
Bdrms Gass I Gass II Gass III Class IV
2 225 60%of
the
4 3375 values
5 450 in the
6 525 Gass I,
7 r 600 11 or It
8 %., 675 columns
D33 AWwpdon Wk h T"
Pac Rate Sob Texture Loading Rae Absorption
mp gpolsq ft Rado
Coarse sand 14
<5 Loamy sand iI ° 1.00
Med.,Fine sand '
6-15 Sandy loam 1.50
16.30 Loam 2.00
3145 Silt Loam,Silt r'_. 2.40
46-60 Clay loam,Silty g; 2.67
6
or Sandy Clay Loam
61-120 Silty or Sandy
Clay or Clay + 5
>120'
`Must be other or performance.
Page 3 of 5
C inspection pipe
Site AA
0 0 0 12"topsoil
1.9
grade
Resbkdve layer 1.1
1
13.0 10.0 20.5
30.5 _
absorption width
Mound Detail: Land slope> 1%
13.0
Upslope berm:
Roclbed
13.0 Width: 10.0 13.0
Total Length:63.0
Width:
43.5
Downslope berm: Downslope absorption width:
20.5 10.0
Total length:89.0
(rotes:
Divert surface water away from mound.
Page 5 of 5 y - '
Site B Job#�
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University of Minnesota Mound Design Worksheet
Greater than 1%Slopes
aFLOWEstimated 750 gpd(see figure A-1)
i i
I or measured x 1.5(safety factor)= 0 gpd i
B. SEPTIC TANK LIQUID VOLUMES
Sept tank 3000 gallons(see figure F1)
Number d tanksloomparlments 0
Effluent f=ilter (yeshw) yes
C-1 SWft To*CqxicKy in Gallons
Number of Minimum Capacity withI=Disp
with
Bedrooms Capacity Garb.Disp. lift
pr
1125
3 or 4 1500
5 or 6 2250
7,8 or 9 3000
C. SONS(Site eva/uedon data)
1. Depth to ms*ft layer= 1.5 feet
2. Depth d percolation tests= 12 inches
3. Texdne ban
4. Soft loading rate(see Figure D-33) 0.60 gpd/ft'
Perooletion rate 14 MPI
5. %Land Slope 6.0 %
D. ROCK LAYER DI1111115NSIONS
1. Multiply average design flow(A)by 0.83 to obtain req*W area of rock layer.Item A x 0.83--
750
.83=750 gpd x 0.83 ftp/gpd= 630 ftz
2. Determine rock layer width =0.83 ft`/gpd x Unear Loading Rate(LLR)(see LLR chart
0.83 fe/gpd x 1 12.00 j = 10.0 ft
LLR Chart
Perk Rate LLR
<120 MPI <=12
>=120 MPI <=6
3. Length of nx*layer=area divided by width=
630.0 fe / 10.0 feet= 63.0 ft
E. ROCK VOLUME
1. Multiply rock area by rock depth to get cubic feet of rods
630.0 X 1.0 ft=
630.0 ft3
2. Divide ft by 27 ft3V to get cubic yards
630.0 ft3 / 27 = 23.3 yd'
3. Multiply cubic yards by 1.4 to get weight of rock in tons;
23.3 yd3 X 1.4 ton/yd 3 = 32.7 tons
h
Page 1 of 5 �=
F. ABSORPTION WIDTH Absorption ratio: 2
1. Absorption width equals absorption ratio times rock layer width Sb B
2.00 x 10.0 ft = 20.0 ft
G. MOUND SLOPE WIDTH&LENGTH(Greater tibm 1%)
1. Downslope absorption width=absorption width minus nods layer width
20.0 feet - 10.0 feet= 10.0 ft
2. Calculate mound�sine
I
UPSLOPE
a.Depth of dean sand at upskrpe edge of rods layer=3 feet manus distance to restricting layer(C1)
3.0 ft - 1.5 ft= 1.5 ft
b.Mound height at the upslope edge of rock layer=depth of dean sand for separation(G2a)
at upslope edge pkrs depth of rock layer(1 foot)to depth of cover(1 foot)
1.5 ft+1ft+1 ft= 3.5 ft
c.Upslope berm multiplier based on land slope(see figure D-34)
Selected berm multiplier: 3.23
d.Upskope width=berm multiplier(Mc)times upslope mound heot(G2b):
3.23 x 3.5 ft = 11.4 ft
DOWNSLOPE
e.Drop in elevation=rock layer width(D2)times percent Iandslope(C5)/100
10.0 ft x 6.0 % /100= 0.6 ft
f.Downslope mound height=depth of dean sand for slope difference(G2e)
at downslope rock edge plus the mound height at the upslope edge of rock layer(2b)
0.6 ft + 3.5 ft= 4.1 ft
g.Downslope berm multiplier based on percent land slope(see Figure D 34
Selected berm multiplier: 5.26
h.Downslope width=downslope multiplier(G2g)times downslope mound height(G21)
5.26 x 4.1 = 21.6 ft
i.Select greater of G1 and G2h as the downslope width 21.6 ft
j.Total mound width is the sum of upslope(G2d)width plus nock layer width(D2)plus downslope width(G2i)
11.4 ft+ 10.0 ft+ 21.6 ft= 43.0 ft
k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)plus upslope width(G2d)
11.4 ft + 63.0 ft+ 11.4 ft= 85.8 ft
Final Dimensions slope>1% 43.0 ft x 85.8 ft
I hereby certify that all work has been completed in accordance with all applicable ordinances,rules&laws.
(signature) 810(license#) 2/20/2007 (date)
ez
4'.
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Page 2 of 5 �,^
H. SAND VOLUME
1. Upslope Volume+ Volume under rodkbed+Downslope Volume SNOB
a.Upslope Volume:(depth of dean sand+1)x(upslope bene) x(mound length)/2=ft
2.5 ft x 11.4 ft x 85.8 ft /2 = 1222.7 ft3
b.Volume under rodcbed: (average depth of sand under rock)x(rockbed width)x(mound length)=ft3
1.8 ft x 10.0 ft x 85.8 ft = 1544.4 ft3
c.Downslope Volume: (depth of dean sand+1)x(downslope berm)x(mound length)/2-ft3
3.1 ft x( 21.6 ft x 85.8 ft 12 2872.6 ft3
Total cubic feet: = 5639.6 ft3 i
2. Divide ft3 by 27 ft3/yd3 to get cubic yards
5639.6 127 = 208.9 yds3
3. Multiply cubic yards by 1.4 to get weight of sand in tons
2089 yds?a1.4 292.4 tons
4 Add 10%for Constnxtability
292.4 tons x 1.1= 321.7 tons
A•1 Esfirtabed Sewage Flours in GPD
No.of
Bdrms Class I Class II Class III Class IV
2 225 60%of
3 300 the
4 - 375 values
5 450 in the
6 n 525 �5 Class I,
7 600r II or II
8 675 columns
D-33 Width Tarda
Perc Rate Sod Texture LoadkV Rate Absorption
MI)i gpolsq It Redo
Coarse sand
<5 Loamy sand :: 1.00
Med.,Fine sand
645 Sand loam 1
16,30 Loam 2
31-45 Sift Loam,Sift � - 2.40
46-60 Clay loan,Silly '' 2.67
or Sandy Clay Loam
61-120 Silty or Sandy
Clay or Clay 5
>120'
'Must be other or performance.
n
Page 3 of 5
,C Inspection Pipe
r Inspection pips
Site B
topsoil
l
12-t
r op""
1.5
Nal grade
Restrictive law 1.5
11.4 10.0 21.6
31.6
absorption width
Mound Detail: Land slope> 1%
11.4
Upslope berm:
...............................................................
RocW)od
11.4 Width: 10.0 11.4
Total Length:63.0
Wkkh:
43.0
Downslope berm: Downslope absorption width:
21.6 10.0
i
.**........................................................................................................7.............................................................................
Total length:85.8
Notes:
Divert surface water away from mound.
Page 5 of 5
Loss of Soil Borinus
License 110
Location or Project: Proposed subdivision of 1150 Wyndmere Road
Borings made by: Rusty Olson's Soil and Perc testing 2/20/2007
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 99.8_ Mottled Soil at 1.8_feet
0"-6"Dark brown loam 10yr3/2 H2O present at X_
6"-18"Brown loam 10yr4/4
18"-22"Brown loam to clay loam 10yr5/4
22"-30"Rusty brown loam 10yr5/4
Boring Number 2_Surface elevation_99.8_ Mottled Soil at 1.5_feet
0"-6"Dark brown loam 10yr3/4 H2O present at—X-
6"-18"Brown loam 10yr4/4
18"-30"Rusty brown sandy loam to loamy sandy clay 10yr5/4
Boring Number_3_Surface Elevation_100.6 Mottled Soil at_1.3 feet
0"-6"Dark brown loam 10yr3/2 H2O present at X-
6"-16N Brown loam 10yr4/4
16"-30"Rusty brown loam 10yr5/4
Boring Number 4 Surface elevation_100.6_ Mottled Soil at_1.1_feet
0-6"Dark brown loam 10yr3/2 H2O present at X
6"-14"Brown loam 10yr4/4
14"-30"Rusty brown loam 10yr5/4
Boring Number 5_Surface elevation-98.8— Mottled Soil at_1.8_feet
0-6"Dark brown loam 10yr3/2 H2O present at X
6"-18"Brown loam 10yr4/4
18"-22"Brown loam to clay loam 10yr5/4
22"-30"Rusty brown loam 10yr5/4
Boring Number 6_Surface elevation_99.4_ Mottled Soil at_1.6_feet
0-"Dark brown loam 10yr3/2 H2O present at X_
6"-20"Brown sandy loam 10yr4/4
20"-30"Rusty brown loam 10yr54
Percolation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Olson's Perc. starting at 11:10 A.M. On2/19%07
Location: Proposed subdivison of 1150 Wyndmere Road
Hole number. 1
Date hole was prepared:2/18//07
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0.$" Dark brown loam 10yi3/2
6"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 02/18/2007 At 10:50 P.M 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 6 inches
rime Time Depth Drop in H2O Perc Rate
11:21 11:51 6" 2.5 12.0
11:58 12:28 6" 2.3 13.0
12:29 12:59 6" 2.3 13.0
AVERAGE PERC. RATE 12.6 M
Percolation Test Data Sheet
Lic.#810
I i
Percolating test readings made by: Rusty Olson's Perc. starting at 11:10 A.M. On2/19/07
Location: Proposed subdivison of 1150 Wyndmere Road
Hole number. 2
Date hole was prepared:2/18//07
Depth of hole bottom_12"_inches, Diameter of hole 6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-6" Dark brown loam 10yr312
6"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 02/18/2007 At 10:50 P.M 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 6 inches
Time Time Depth Drop in H2O erc Rate
11:22 11:52 6" 2.2 13.6
11:57 12:27 6" 2.1 14.3
12:30 1:00 6" 2.1 14.3
AVERAGE PRC. RAE 14.1 MPI
Percolation Test Data Sheet
Lic.#810
f I
Percolating test readings made by: Rusty Olson's Perc. starting at 11:10 A.M. On2/19/07
Location: Proposed subdivison of 1150 Wyndmere Road
Hole number. 3
Date hole was prepared:2/18//07
Depth of hole bottom—12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0.6" Dario brown loam 10yr312
6"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 02/18/2007 At 10:50 P.M 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 6 inches
Time Time Depth Drop in H2O Perc Rate
11:2 11:53 6" 2.0 15.0
11:56 12:26 6" 2.0 15.0
12:31 1:01 6" 2.0 15.0
AVERAGE PERC. RATE 15.0 MP
CJ_: r
Percolation Test Data Sheet
Lic.#810
Percolating test readings made by: Rusty Olson's Perc. starting at 11:10 A.M. On2/19/07
Location: Proposed subdivison of 1150 Wyndmere Road
Hole number: 4
Date hole was prepared:2/18//07
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-6° Dark brown loam 10yr3/2
6"-12" Brown loam 10yr4/4
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 02/18/2007 At 10:50 P.M 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 6 inches
Time Time Depth Drop in H2O Perc Rate
11:24 11:54 6" 2.1 14.3
11:55 12:25 6" 2.1 14.3
12:32 1:02 6" 2.1 14.3
AVERAGE PERC. RATE 14.3 MPI
E