HomeMy WebLinkAboutSoil & Percolation Testing i155 %CO-'
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
September 20,2005
Suad Azhari&Omar Abukhadra
Proposed Lot 5
1745 Fox Street
Orono,Hennepin.County
This on-site Sewage Treatment System is partially desimd for a Type 1,five-bedroom home in accordance
with the Minnesota Pollution Control Agency Chapter 7180 and local ordinances.
Once the house size,location and septic site are chosen tris design can be completed.
The seasonally saturated soils were located at 24"-30"(nettled soil). Due to the seasonally saturated soils,
a pressurized Mound System will need to be installed to resat septic effluent. The bottom of the treatment
area must be located at least 3' above the saturated sow.
The soils at a depth of 12"have a percolation rate averts 4 MPI.
A pumping chamber will need to be installed to lift the eminent to the treatment area. The power supply and
switches must be located outside the manhole and pumper chamber in a weatherproof enclosure. A
warning device must be installed with a light and sound i:evice;this is in case of a pump failure.
Keep all heavy equipment off of the proposed treatmt 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 area proposed for the On-Site Sewage Treatment
systems occurs.
Nothing other than gray water,(laundry,showers,ect.)Inman water&toilet tissue should be disposed of
into the septic tanks. Garbage disposals are not recomnerided. Additives must no be used,they may cause
harmful damage to your septic system. It is recommence that you pump the septic tank every year for 1
tank,every two years for two tanks.
Since ely,
40/-
Joseph J.Olson
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Note This system is to be constructed to meet Date:._,1..112L Ph.763-4984779
the hinnesoio Pollution Control Agency RustyOIsOn's •t� and Percolation TestingChapter 7080 & Local Ordinance
Designed t en '40
Note r Check all underground utilities /
•
' • University of Minnesota Mound Design Worksheet - 10125104
All boxed rectangles must be entered, the rest will be calculated.
ONs re
SEWAGE
A. Estimated Flow 750 gpd(Fig.A-1) TREATMENT
PROGRAM
A-1 Estimated Sewage Flows in GPD
Number of Class
Bedrooms I II III IV
2 300 225 180 60%of Lot 5,Site A
3 ..450 300 218 the
4 600 375 256 values
5 '`;`°750 450- 294 in the
6 900 525 332 Class I,
7 1050. 600 ;370 I I or II
8 1200 675 408 columns
B. Minimum Septic Tank Capacity
Septic tank capacity 3000 gallons Number of tanks/compartments 0
Effluent filter(yes/no) Yes
C-1 Minimum Septic Tank Capacity in Gallons
Number of Minimum Capacity with Capacity with GD and *GD=garbage disposal
Bedrooms Capacity GD* pump in basement** Must have multiple tanks or compartments
2 or less 750 1125 1500 ** Must have multiple tanks,compartments
3 or 4 1000 1500 `' 2000 or effluent screen
5 or 1500 2250 3000
7,8 or'_9 2000 _ 3000 4000
C. SOILS(Site evaluation data) D-33 Absorption Width Sizing Table
1. Depth to restricting layer 2 feet Perc Rate
mpi Soil Texture Loading Rate Absorption
2. Texture loam (gpd/ft2) Ratio
Coarse sand, Loamy
3. Loading rate(see Fig D-33) 0.60 gpd/ft2 <5 sand,Med and Fine 1.20 1.00
sand
4. Absorption Ratio(Fig D-33) I 2.00 6-15 Sandy loam 019 1.50
16-30 Loam 0.60 2.00
5. Percolation rate if available I 4/ MPI 31-45 Silt Loam,Silt 0.50 2:40
46-60 Clay loam(CL),Silty 0.45 2.67
6. %Slope 7 % or Sandy CL
61=120' Silty or;Sandy 0.24 5
Clay or Clay
>120*
*Must be other or performance.
D. ROCK LAYER DIMENSIONS
1. Multiply average design flow(A)by 0.83 to obtain required area of rock layer: Item A x 0.83=
750 gpd x 0.83 ft2/gpd 622.5 ft2 LLR Chart
2. Determine rock layer width =0.83 ft2/gpd x Linear Loading Rate(LLR)(see LLR chart) Perk Rate LLR
0.83 ft2/gpd x 12 = 10.0 ft <120 MPI <=12
3. Length of rock layer=area divided by width= >=120 MPI* <=6
622.5 ft2 / 10 ft = 62.5 ft *or other limited soil conditions
E. ROCK VOLUME
1. Multiply rock area by rock depth to get cubic feet of rock
622.5 X 1 ft = 622.5 ft3
2. Divide ft3 by 27 ft3/yd3 to get cubic yards
622.5 ft3 / 27 = 23.1 yd3
3. Multiply cubic yards by 1.4 to get weight of rock in tons;
23.1 yd3 X 1.4 ton/yd3 = 32.3 tons
4. Add in 10%extra for constructability= 1.1 x 32.3 = 35.5 tons
• MOUND SLOPE WIDTH&LENGTH(Greater than 1%)
F. ABSORPTION WIDTH
Absorption width equals absorption ratio(C4)times rock layer width(D2)
2 x 10.0 ft = 20.0 ft
G.
1. Downslope absorption width=absorption width(F)minus rock layer width(D2) D-34 Slope Multiplier Table
20 ft - 10 ft = 10 ft Land
Slope Upslope Downslope
2. Calculate mound size in% multipliers multipliers
UPSLOPE 3:1 4:1 3:1 4:1
a.Determine depth of clean sand at upslope edge of rock layer 0 3.00 4.00 3.00 4.00
=3 feet minus distance to restricting layer(C1) 1 2.91 3.85 3.09 4.17
3 ft - 2 ft= 1 ft 2 2.83 3.70 3.19 4.35
3 2.75 3.57 3.30 454
b.Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a) 4 2.68 3.45 3.41 4.76
at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) 5 261 3.33 3.53 5.00`.
1 ft+1 ft+1 ft= 3 ft 6 2.54 3.23 3.66 5.26
7 2.48 3.12' 3.80 5.56
c.Upslope berm multiplier based on land slope(see figure D-34) 3.12 8 2.42 3.03 3.95 5.88
9 236 2.94 4.11 625
d.Upslope width=berm multiplier(G2c)times upslope mound height(G2b): 10 2.31 2.86 4.29 6.67
3.12 x 3 ft = 9.4 ft 11 2.26 2.78 4.48 7.14'.
12 2.21 2.70 4.69 7.69
DOWNSLOPE
e.Drop in elevation=rock layer width(D2)times percent landslope(C5)/100
10 ft x 7 % /100= 0.7 ft
f.Downslope mound height=depth of clean sand for slope difference(G2e)
at downslope rock edge plus the mound height at the upslope edge of rock layer(2b)
0.7 ft + 3 ft = 3.7 ft
g.Downslope berm multiplier based on percent land slope(see Figure D-34) 3.8
h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2f)
3.8 x 3.7 = 14.0 ft
j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2h)
9.4 ft+ 10.0 ft + 14.0 ft = 33.4 ft
k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)
plus upslope width(G2d)
9.4 ft + 62.5 ft + 9.4 ft = 81.2 ft
Final Dimensions (slope>1%) 33.4 ft x 81.2 ft
I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws
(Signature) 810 (License#) 6/11/2005 (date)
. University of Minnesota Mound Design Worksheet - 10/25/04
All boxed rectangles must be entered,the rest will be calculated.
ON:rn
SEWAGE
A. Estimated Flow( 750 gpd(Fig.A-1) TREATMENT
PROGRAM
A-1 Estimated Sewage Mows in GPD
Number of Class
Bedrooms I II III IV
2 300 225 180 60%of lot 5,Site B
3 450 300 218 the
4 600 375 256 values
5 750 450 294 in the
6 900 525 332 Class I,
7 1050 600 370 II or II
8 1200 675 408 columns
B. Minimum Septic Tank Capacity
Septic tank capacity 3000 gallons Number of tanks/compartments 0
Effluent filter(yes/no) Yes
C-1 Minimum Septic Tank Capacity in Gallons
Number of Minimum Capacity with Capacity with GD and *GD=garbage disposal
Bedrooms Capacity GD* pump in basement** Must have multiple tanks or compartments
2 or less 750 1125 1500 ' Must have multiple tanks,compartments
3 or 4 1000 1500 2000 or effluent screen
5 or 6 1500 2250 3000
7,8 or 9 2000 3000 4000
C. SOILS(Site evaluation data) D-33 Absorption Width Sizing Table
1. Depth to restricting layer I 2 feet Perc Rate
mpi Soil Texture Loading Rate Absorption
2. Texture loam (gpd/ft2) Ratio
Coarse sand,Loamy
3. Loading rate(see Fig D-33) 0.60 gpd/ft2 <5 sand,Med and Fine 1.20 1.00
sand
4. Absorption Ratio(Fig D-33) I 2.00 I 6-15 Sandy loam 0.79 1.50
16-30 Loam 0.60 2.00
5. Percolation rate if available y IMP! 31-45 Silt Loam,Silt 0.50 2.40
46-60 Clay loam(CL), Silty 0.45 2.67
6. %Slope j 6 j% or Sandy CL
61-120 Silty or Sandy 0.24 5
Clay or Clay
>120*
*Must be other or performance.
D. ROCK LAYER DIMENSIONS
1. Multiply average design flow(A)by 0.83 to obtain required area of rock layer: Item A x 0.83=
750 gpd x 0.83 ft2/gpd 622.5 ft2 LLR Chart
2. Determine rock layer width =0.83 ft2/gpd x Linear Loading Rate(LLR)(see LLR chart) Perk Rate LLR
0.83 ft2/gpd x 12 = 10.0 ft <120 MPI <=12
3. Length of rock layer=area divided by width= >=120 MPI* <=6
622.5 ft2 / 10 ft = 62.5 ft *or other limited soil conditions
E. ROCK VOLUME
1. Multiply rock area by rock depth to get cubic feet of rock
622.5 X 1 ft = 622.5 ft3
2. Divide ft3 by 27 ft3/yd3 to get cubic yards
622.5 ft3 / 27 = 23.1 yd3
3. Multiply cubic yards by 1.4 to get weight of rock in tons;
23.1 yd3 X 1.4 ton/yd3 = 32.3 tons
4. Add in 10%extra for constructability= 1.1 x 32.3 = 35.5 tons
•
MOUND SLOPE WIDTH&LENGTH(Greater than 1%)
F. ABSORPTION WIDTH
Absorption width equals absorption ratio(C4)times rock layer width(D2)
2 x 10.0 ft = 20.0 ft
G.
1. Downslope absorption width=absorption width(F)minus rock layer width(D2) D-34 Slope Multiplier Table
20 ft - 10 ft = 10 ft Land
Slope Upslope Downslope
2. Calculate mound size in% multipliers multipliers
UPSLOPE 3:1 4:1 3:1 4:1
a.Determine depth of clean sand at upslope edge of rock layer 0 3.00 4.00 3.00 4.00
=3 feet minus distance to restricting layer(C1) 1 2.91 3.85 3.09 4.17
3 ft - 2 ft= 1 ft 2 2.83 3.70 3.19 4.35
3 2.75 3.57 330 4.54'
b.Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a) 4 2.68 3.45 3.41 4.76
at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) 5 2.61 333 3.53: 5.00'
1 ft+1ft+1 ft= 3 ft 6 2.54 3.23 3.66 5.26
7 2.48 3.12 3.80 5.56
c.Upslope berm multiplier based on land slope(see figure D-34) 3.23 8 2.42 3.03 3.95 5.88
9 2.36 2.94 4:11 6.25
d.Upslope width=berm multiplier(G2c)times upslope mound height(G2b): 10 2.31 2.86 4.29 6.67
3.23 x 3 ft = 9.7 ft 11 2.26 2.78 4.48 7.14
12 2.21 2.70 4.69 7.69
DOWNSLOPE
e.Drop in elevation=rock layer width(D2)times percent landslope(C5)/100
10 ft x 6 % /100= 0.6 ft
f. Downslope mound height=depth of clean 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 ft = 3.6 ft
g.Downslope berm multiplier based on percent land slope(see Figure D-34) 3.66
h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2f)
3.66 x 3.6 = 13.2 ft
j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2h)
9.7 ft+ 10.0 ft + 13.2 ft = 32.8 ft
k.Total mound length is the sum of upslope width(G2d)plus rock layer length(D3)
plus upslope width(G2d)
9.7 ft + 62.5 ft + 9.7 ft = 81.9 ft
Final Dimensions (slope>1%) 32.8 ft x 81.9 ft
I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws
(Signature) 810 (License#) 6/11/2005 (date)
•
Logs of Soil Borings
License#810
Location or Project: Preliminary Plat Borings for Suad Azhari &Omar Abukhadra Lot 5
Borings made by: Rusty Olson's Soil and Perc testing 3/8/05
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_945.4_ Mottled Soil at 2.3_feet
0"-18" Dark brown loam to sandy loam 10yr3/2 H2O present at X
18"-28" Brown sandy loam 10yr4/4
28"-36" Rusty brown loam 10yr5/4
Boring Number_2_Surface elevation_943.3_ Mottled Soil at_2.5 feet
0-20" Dark brown sandy loam 10yr3/2 H2O present at_X_
20"-30" Brown sandy loam 10yr4/4
30"-36" Rusty brown loam 10yr5/4
Boring Number_3_Surface Elevation_945.7 Mottled Soil at_2.1 feet
0"-16" Dark brown sandy loam 10yr3/2 H2O present at X_
16"-26" Brown sandy loam 10yr4/4
26"-36" Rusty brown loam 10yr5/4
Boring Number_4 Surface elevation_945.7_ Mottled Soil at_2.6_feet
0-12" Dark brown loam 10yr3/2 H2O present at X_
12"-26" Brown sandy loam 10yr4/4
26"-32" Brown sandy loam 10yr5/4
32"-42" Rusty brown loam 10yr5/4
Boring Number 5_Surface elevation_944.7_ Mottled Soil at_X feet
0-16" Dark brown sandy loam 10yr3/2 H2O present at X
16"-24" Brown sandy loam 10yr4/4
24"-30" Brown loam 10yr5/3
Boring Number 6 Surface elevation 944.1_ Mottled Soil at 2.0_feet
0-12" Dark brown loam 10yr3/2 H2O present at_X_
12"-24" Brown sandy loam 10yr4/4
24"-30" Rusty brown loam 10yr5/4
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:50 A.M. On 08/24/05
Location: Proposed Lot 5, Block 1 1745 Fox Street
Hole number: 1
Date hole was prepared: 08/23/05
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-12" Dark brown sandy loam 10yr3/2
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 08/23/05 At 10:30 A.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
11:01 11:16 6" 4.0 37
11:23 11:38 6" 3.8 3.9
11:39 11:54 6" 3.7 4.0
AVERAGE PERC. RATE 3.9 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:50 A.M. On 08/24/05
Location: Proposed Lot 5, Block 1 1745 Fox Street
Hole number: 2
Date hole was prepared: 08/23/05
Depth of hole bottom 12" inches, Diameter of hole 6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-12" Dark brown sandy loam 10yr3/2
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 08/23/05 At 10:30 A.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
11:02 11:17 6" 4.2 3.5
11:22 11:37 6" 4.1 3.6
11:40 11:55 6" 4.0 3.7
AVERAGE PERC. RATE 3.6 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:50 A.M. On 08/24/05
Location: Proposed Lot 5, Block 1 1745 Fox Street
Hole number: 3
Date hole was prepared: 08/23/05
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-12" Dark brown sandy loam 10yr3/2
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 08/23/05 At 10:30 A.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
11:03 11:18 6" 3.7 4.0
11:21 11:36 6" 3.6 4.1
11:41 11:56 6" 3.5 4.2
AVERAGE PERC. RATE 4.1 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:50 A.M. On 08/24/05
Location: Proposed Lot 5, Block 1 1745 Fox Street
Hole number: 4
Date hole was prepared: 08/23/05
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 and hour of initial water filling 08/23/05 At 10:30 A.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
11:04 11:19 6" 3.8 3.9
11:20 11:35 6" 3.8 3.9
11:42 11:57 6" 3.8 3.9
AVERAGE PERC. RATE 3.9 MPI