HomeMy WebLinkAboutSoil and perc testing 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
October 22,2003
Maxwell Bay Estates .
-��s �.�t �3
3250 Fox Street
Orono,Henn. Co.
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 and location are chosen this design can be completed.
The seasonally saturated soils were(ocated at 16"-30"(mottled soil). Due to the seasonally saturated soils,
a presswized Mound System will need to be installed to treat septic ef�luent. T'he 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 15 MPI.
All test holes were located by Gronberg&Associates.
A pumping chamber will need to be installed to lift the ef�luent 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
wil!need to be relceated if failure to protect the areas propased 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,
/�.
Joseph J. Olson
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� Mound Design Worksheet (For flows up to 1200 gpd)
All boxed�ctangles must be entered, the rest will be calculated.
A. FLOW
Estimated 750 gpd(see figur�A-1)
or measured x 1.5(safety factor)= 0 gpd
. B. SEPTIC TANK LIQUID VOLUMES
Septic tank capacity 2250 gallons(see figu�t G1)
ep ic an apaci in a ons
Number of Minimum Capacity with Capacity with
Bedrooms Capaaty Garb. Disp. Disp. and Lift
2 orless 750 1125 1500
3 or 4 1000 1500 2000
5 or 6 1500 2250 3000
7,8 or 9 2000 3000 4000
C. SOILS(Site evaluation data)
1. Depth to restricting layer= 1.6 feet
2. Depth of percolation tests= 12 inches
3. Texture loam
4. Soil loading rate(see Figure D-33) 0.6 gpd/ft
Percolation rate 15 MPI
5. °k Land Slope 9 %
D. ROCK LAYER DIMENSIONS
1. Multiply average design flow(Aj by 0.83 to obtain required area of rodc layer: Item A x 0.83=
750 gpd x 0.83 ft gpd= 622.5 ft
2. Determine rodc layer width =0.83 ft/gpd x Linear Loadin Rate LLR)(see LLR chart)
0.83 ft2lgpd x 12 = � 10.0 ft
LLR Chart
Perk Rate LLR
<120 MPI <=12
>=120 MPI <=6
3. Length of rock layer=area divided by width=
622.5 ft I 10 feet= 62.5 feet
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 ft3lyd3 to get cubic yards
622.5 ft3 I 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
F. ABSORPTION WIDTH
1. Abso tion width equats absorption ratio(see Figure D-33)times rock layer width
2 x 10.0 ft = 20.0 ft
Page 1 of 6
G. MOUND SLOPE WIDTH 8 LENGTH(Greaterthan 1%)
1. Downslope absorption width=absorption width minus rock layer width
20 feet - 10 feet= 10 feet
2. Calculate mound size
UPSLOPE
a. Determine depth of dean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1)
3 ft - 1.6 ft= 1.4 feet
b. Mound height at the upslope edge of rock layer=depth of clean sand for separation (G2a)
at upsiope edge plus depth of rock layer(1 foot)to depth of cover(1 foot)
1.4ft+ 1ft+ 1ft= 3.4 feet
c. Upslope berm multiplier based on land slope(see figur�D-34)
Select bemi multiplier of 2.94
d. Upslope width=berm multiplier(G2c)times upslope mound height(G2b):
2.94 x 3.4 ft = 10.0 feet
DOWNSLOPE
e. Drop in elevation=rock layer width(D2)times percent landslope(C5)/100
10 ft x 9 % I 100= 0.9 feet
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)
0.90 ft + 3.4 ft= 4.3 feet
g. Downslope berm multiplier based on percent land slope(see Figure D-34) 6.25
h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2�
6.25 x 4.3 = 26.0 feet
i. Select greater of G1 and G2h as the downslope width 26.0 feet
j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus dovmslope width(G2i)
10.0 ft+ 10.0 ft+ 26.0 ft= 46.0 feet
k.Total mound length is the sum of upslope width(G2d)plus rock layer length (D3)
plus upslope width (G2d)
10.0 ft + 62.5 ft+ 10.0 ft= 82.5 feet
Final Dimensions (slope>1%) 46.0 ft x 82.5 ft
I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws
�� (signature) 810 (license#) /��r�a_/,�� _(date)
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P e2of6
Loqs of Soil Borinqs
� License#810
Location or Project: 3250 Fox Street Proposed lot 5,
Borings made by: Rusty Olson's Soil and Perc testing 10/16103
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_989.3_ Mottled Soil at_2.6_feet
0"-14" Dark brown loam 1 Qyr3/3 H20 present at_X
14"-20" Brown strong loam 10yr414
20"-32" B�own loam 10yr5/6
32"-36" Rusty brown loam 10yr5/6
Boring Number_2_Surface elevation_989.3_ Mottled Soil at_1.6_feet
0-8" Dark brown loam 10yr3/3 H20 present at X
8"-20" Brown strong loam 10yr4/4
20"-30" Rusty brown loam 10yr5/4
Boring Number_3_Surface Elevation_991.8 Mottled Soil at_2.5_feet
0-12" Dark brown loam 10yr3/3 H20 present at X
12"-18" Brown loam 10yr4/4
18"-30" Brown strong loam 10yr4/4
30"-36" Brown strong loam weak mottles 10yr5/4
Boring Number 4_ Surface elevation_991.8_ Mottled Soil at_1.8_feet
0-8" Dark brown loam 10yr3/3 H20 present at_X
8"-22" Brown loam 10yr4/4
22"-36" Rusty brown loam 10yr5/4
Boring Number_5_Surface elevation_986.8_ Mottled Soil at_1.8_feet
0-8" Dark brown loam 10yr3/3 H20 present at_X_
8"-22" Brovm loam 10yr4/4 .
22"-30" Rusty brown loam 10yr5/4
Boring Number 6_Surface elevation_991.4_ Mottled Soil at_1.4_feet
0-8" Dark brown loam 10yr3/3 H20 present at_X
8"-16" Brown loam 10yr4/4
16"-30" Rusty brown loam 10yr5/6
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 11:30 A.M. On 10/17/03
Location: 3250 Fox Street Proposed Lot 5, Blk 1
Hole number: 1
Date hole was prepared: 10/16/03
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil te�ure
0-12" Dark brown toam 10yr313
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/16/03 At 10:00 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 H20 Perc Rate
11:41 12:11 6" 3.2 9.4
12:18 12:48 6" 3 10
12:49 1:19 6" 2.9 10.3
AVERAGE PERC. 9.9 MP�
Percolation Test Data Sheet
Lic.#S10
Percolation test readings made by: Rusty Olson's Perc. starting at 11:30 A.M. On 10/17/03
Location: 3250 Fox Street Proposed Lot 5, Blk 1
Hole number: 2
Date hote was prepared: 10/16/03
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test ho1e:
Depth, inches Soil texture
0-g" Dark brown loam 10yr3/3
8"-12" Brown strong 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 10/16/03 At 10:00 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 H20 Perc Rate
11:42 12:12 6" 2.2 13.6
12:17 12:47 6" 2.1 14.3
12:50 1:20 6" 2 15
AVERAGE PERC. 14.3 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 11:30 A.M. On 10/17/03
Location: 3250 Fox Street Proposed Lot 5, Blk 1
Hole number: 3
Date hole was prepared: 10/16/03
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-12" Dark brown toam 10yr3/3
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/16/03 At 10:00 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 H20 Perc Rate
11:43 12:13 6" 1.6 18.7
12:16 12:46 6" 1.5 20
12:51 1:21 6" 1.5 20
AVERAGE PERC. 19.5 MPI
Percolation Test Data Sheet
Lic.#S10
Percolation test readings made by: Rusty Olson's Perc. starting at 11:30 A.M. On 10/17/03
Location: 3250 Fox Street Proposed Lot 5, Bik 1
Hole number: 4
Date hole was prepared: 10/16/03
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 10yr3/3
8"-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 10/16/03 At 10:00 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 H20 Perc Rate
11:44 12:14 6" 2 15
12:15 12:45 6" 1.9 15.7
12:52 1:22 6" 1.9 15.7
AVERAGE PERC. 15.4 MPI
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
o�cot� 22,Zoo3
Maxwell Bay Estates
Proposed Lot 3, �
3250 Fox Street
Orono,Henn.Co.
This on-site Sewage Treatment System is partially designed for a Type l,five-bedroom home in
accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances.
Once the house size and location are chosen this design can be completed.
T'he seasonally saturated soils were located at 14"-30"(mottled soil). Due to the seasonally saturated soils,
a pressurized Mound System will need to be installed to treat septic ef�luent. 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 6 MPI.
All test holes were located by Gronberg&Associates.
A pumping chamber will need to be installed to lift the ei�luent 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 necd to be relceated 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,
Joseph J. Olson
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Mound Design Worksheet (For flows up to 1200 gpd)
All boxed rectangles must be entered, the r�st will be calculafed.
A. FLOW
Estimated 750 gpd(see figure A-1)
or measured x 1.5(safety factor)= 0 gpd
B. SEPTIC TANK LIQUID VOLUMES
Septic tank capacity 2250 gallons(see figure C-1)
ep c an apac n a ons
Number of Minimum Capacity with Capaaty with
Bedrooms Capaaty Garb. Disp. Disp.and Lift
2 orless 750 1125 1500
3 or 4 1000 1500 2000
5 or 6 1500 2250 3000
7,8 or 9 20b0 3000 4000
C. SOILS(Site evaluation data) '
1. Depth to restricting layer= 1.8 feet
2. Depth of percolation tests= 12 inches
3. Texture loam
4. Soil loading rate(see F'�gure D-33) 0.6 gpd/ft�
Percolafion rate 6 MPI
5. %L.and Slope 7 %
D. ROCK LAYER DIMENSIONS
1. Mul6ply average design flow(A)by 0.83 to obtain required area of rock layer: Item A x 0.83=
750 gpd x 0.83 ft21gpd= 622.5 ft
2. Determine rodc layer width =0.83 ft Igpd x Linear Loadin Rate(LLR)(see LLR chart)
0.83 ft�lgpd x 12 = 10.0 ft
LLR Chart
Perk Rate LLR
<120 MPI <=12
>=120 MPI <=6
3. Length of rock layer=area divided by width=
622.5 ft2 I 10 feet= 62.0 feet
E. ROCK VOLUME
1. Muitiply rock area by rock depth to get cubic feet of rock
622.5 X 1 ft= 622.5 ft3
Z. Divide ft3 by 27 ft31yd3 to get cubic yards
622.5 ft3 I 27 = 23.1 yd3
3. Multiply cubic yards by 1.4 to get weight of rock in tons;
23.1 yd3 X 1.4 tonlyd3 = 32.3 tons
F. ABSORPTION WIDTH
1. Abso tion width equals absorption ratio(see Figure D-33)times rock layer width
2 x 10.0 ft = 20.0 ft
Page 1 of 6
G. MOUND SLOPE WIDTH 8 LENGTH (Greater than 1%)
1. Downslope absorption width=absorption width minus rock layer width
20 feet - 10 feet= 10 feet
2. Calculate mound si2e
UPSLOPE
a. Determine depth of clean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1)
3 ft - 1.8 ft= 1.2 feet
b. Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a)
at upslope edge ptus depth of rock layer(1 foot)to depth of cover(1 foot)
1.2 ft+ 1 ft+ 1 ft= 3.2 feet
c. Upslope berm multiplier based on land slope(see figure D-34)
Select berm multiplier of 3.12 .
d. Upslope width=berm muitiplier(G2c)times upsiope mound height(G2b):
3.12 x 3.2 ft = 10.0 feet
DOWNSLOPE
e.Drop in elevation=rodc layer width(D2)times percent landslope(C5)/100
10 ft x 7 % !100= 0.7 feet
f. Dowmslope mound height=depth of clean sand for slope difference(G2e)
at downslope rock edge plus the mound height at the upslope edge of rodc layer(2b)
0.70 ft + 3.2 ft= 3.9 feet
g. Downslope berm multiplier based on percent land slope(see Figure D-34) 5.56
h. Downslope width=downslope multiplier(G2g)times downslope mound height(G2�
5.56 x 3.9 = 21.0 feet
i. Select greater of G1 and G2h as the downslope width 21.0 feet
j.Total mound width is the sum of upslope(G2d)width plus rock layer width(D2)plus downslope width(G2i)
10.0 ft+ 10.0 ft+ 21.0 ft= 41.0 feet
k.Total mound length is the sum of upslope width (G2d)plus rock layer length(D3)
plus upslope width(G2d)
10.0 ft + 62.0 ft+ 10.0 ft= 82.0 feet
Final Dimenslons (slope>1%) 41.0 ft x 82.0 ft
I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws
�— (signature) 810 (license#) Q a a �(date)
P e2of6
Loqs of Soil Borinc�s
License#810
Location or Project: 3250 Fox Street Proposed lot3, BIk1
Borings made by: Rusty Olson's Soil and Perc testing 10/13/03
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_952.4_ Mottled Soil at_2.5_feet
0"-16" Dark brown loam 10yr4/2 H20 present at_X
16"-30" Brown loam 10yr4/4
30"-36" Rusty brown loam 10yr5/4 .
Boring Number 2_Surface elevation_951.4_ Mottled Soil at_1.8_feet
0-10" Dark brovm loam 10yr4/2 H20 present at_X_
10"-22" Bro�m loam 10yr5/4
22"-30" Rusty brown loam 10yr6/4
Boring Number_3_Surface Elevation 948.9 Mottled Soil at_1.1_feet
0-8" Dark brown loam 10yr4/2 H20 present at X
8"-14" Brown strong loam 10yr5/4
14"-30" Rusty brown loam 10yr6/4
Boring Number 4_ Surface elevation_950.4_ Mottled Soil at_1.4_feet
0-8" Dark brown loam 10yr4/3 H20 present at X
8"-16" Brown strong loam 10yr5/4
16"-30" Rusty brown loam 10yr6/6
Boring Number 5_Surface elevation_952.4_ Mottled Soil at_2.2_feet
0-16" Dark brown loam 10yr4/2 H20 present at_X
16"-28" Brown loam 10yr4/4
28"-36" Rusty brown loam 10yr5/4
Boring Number 6_Surface elevation_9502_ Mottled Soil at_1.4_feet
0-8" Dark brown loam 10yr4/3 H20 present at_X
8"-16" Brown strong loam 10yr5/4
16"-30" Rusty brown loam 10yr6/6
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:05 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot 3, Blk 1
Hole number: 1
Date hole was prepared: 10/13/03
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 10yr4/2 •
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/13/03 At 2:00 P.M. depth of initial water filling 12 inches
above hole bottom.
Method used to mairrtain 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 H20 Perc Rate
10:15 10:30 6" 5.2 2.8
10:36 10:51 6" 5 3
10:55 11:10 6" 4.8 3.1
AVERAGE PERC. 3 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:05 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot 3, Blk 1
Hole number: 2
Date hole was prepared: 10/13/03
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
0-10" Dark brown loam 10yr4/2 �
10"-12" Brown strong loam 10yr4/3
Method of scratching side watl: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/13/03 At 2:00 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 H20 Perc Rate
10:16 10:31 6" 2 7.5
10:37 10:52 6" 1.9 7.9
10:56 11:11 6" 1.8 8.3
AVERAGE PERC. 7.9 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:05 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot 3, Blk 1
Hole number: 3
Date hole was prepared: 10/13/03
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 10yr4/2 �
8"-12" Brown strong loam 10yr4/3
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/13/03 At 2:00 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 H20 Perc Rate
10:17 10:32 6" 1.5 10
10:38 10:53 6" 1.5 10
10:57 11:12 6" 1.5 10
AVERAGE PERC. 10 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 10:05 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot 3, Blk 1
Hole number: 4
Date hole was prepared: 10/13/03
Depth of hole bottom_12"_inches, Diameter of hole_6"_inches.
Soil data from test hole:
Depth, inches Soil texture
p-8" Dark brown loam 10yr4/2 •
8"-12" Brown strong loam 10yr4/3
Method of scratching side wall: Knife
Depth of gravel in bottom of hole 2 inches:
Date and hour of initial water filling 10/13/03 At 2:00 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 H20 Perc Rate
10:18 10:33 6" 5.3 2•8
10:39 10:54 6" 5 3
10:58 11:13 6" 4.7 3•2
AVERAGE PERC. 3 1