HomeMy WebLinkAboutSoil & perc testing -2003 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�rot� 22,2003
Maacwell Bay Estates .
Proposed Lot� `
3250 Fox Street
Orono,Henn.Co.
T'his 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 located at 16"-26"(mottled soil). Due to the seasonally saturated soils,
a pressurized Mound System will need to be installed to treat septic ef�fluent. 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 11 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 oS 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 5ystem
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,
/
Joseph J. Olson
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--- , , l ,I� �iti�i��n�i���.i� i � Designedb �.�'I _
Mound Design Worksheet (For fiows up to 1200 gpd)
All boxed redangles must be entered, the r�st wrll be calculated.
A. FLOW
Estimated 750 gpd(see figure A-1)
or measured x 1.5(safety factor)= 0 gpd
.B. SEPTIC TANK LIQUID VOLUMES
Sep6c tank capacity 2250 gallons(see figur�G1)
ep c an apaci m a ons
Number of Minimum Capacity with Capacity with
Bedrooms Capaaty Garb. Disp. Disp. and Lift
2 or less 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= 1.4 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 11 MPI
5. %Land Slope 7 %
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 fttigpd= 622.5 ft
2. Determine rock layer width =0.83 ft Igpd x Linear Loading Rate(LLR)(see LLR chart)
0.83 ft/gpd 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/ 10 feet= 62.0 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 ft31yd3to 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(Greater than 19�0)
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 clean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1)
3 ft - 1.4 ft= 1.6 feet
b. Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a)
at upsfope edge plus depth of rock layer(1 foot)to depth of cover(1 foot)
1.6ft+ 1ft+1ft= 3.6 feet
c. Upslope berm multiplier based on land slope(see flgure D-34)
Select benn multiplier of 3.12
d. Upslope width=berm multiplier(G2c)ames upslope mound height(G2b):
3.12 x 3.6 ft = 11.0 feet
DOWNSLOPE
e. Drop in elevation=rodc layer width(D2)times per�ent landslope(C5)1100
10 ft x 7 % I 100= 0.7 feet
f. Downslope mound height=depth of dean sand for siope difference(G2e)
at downslope rodc edge plus the mound height at the upslope edge of rock layer(2b)
0.70 ft + 3.6 ft= 4.3 feet
g.Downslope berm multiplier based on percent land slope(sae Figure D-34) 5.56
h. DoNmslope width=dovmslope multiplier(G2g)6mes downslope mound height(G2�
5.56 x 4.3 = 23.0 feet
i.Select greater of G1 and G2h as the downslope width 23.0 feet
j.Total mound width is the sum of upslope(G2d)width plus rodc layer width(D2)plus dovmslope width(G2i)
11.0 ft+ 10.0 ft+ 23.0 ft= 44.0 feet
k.Total mound length is the sum of upslope width(G2d)plus rock layer length (D3)
plus upslope width(G2d)
11.0 ft + 62.0 ft+ 11.0 ft= 84.0 feet
Final Dimensions (slope>1%) 44.0 ft x 84.0 ft
I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws
,,:�� (signature) 810 (license#) /V�v��/c3 (date)
P e2of6
Loas of Soil Borins�s
License#810
Location or Project: 3250 Fox Street Proposed Lot 2, Blk 1
Borings made by: Rusty Olson's Soil and Perc testing 10I13/03
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_950.4_ Mottled Soil at_2.1_feet
0"-16" Dark brown loam to sandy loam 10yr3/3 H20 present at_X
16"-26" Brown loam to sandy loam 10yr5/4
26"-36" Rusty brown loam 10yr5/4 .
Boring Number 2_Surface elevation_951.6_ 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 10yr5/4
Boring Number_3_Surface Elevation_948.4 Mottled Soil at_1.5_feet
0-10" Dark brown loam 10yr3/3 H20 present at_X
10"-18" Brown loam 10yr4/4
18"-30" Rusty brown clay loam 10yr5/4
Boring Number 4_ Surface elevation_949.8_ Mottled Soil at_1.5_feet
0-8" Daric brown loam 10yr3/3 H20 preserrt at_X
8"-18" Brown loam 10yr4/4
18"-24" Rusty brown clay loam 10yr5/4
24"-30" Rusty brown loam 10yr5/6
Boring Number 5_Surface elevation_951.6_ Mottled Soil at_1.5_feet
0-12" Dark brown loam 10yr3/3 H20 present at_X
12"-18" Brown loam 10yr4/4
18"-30" Rusty brown loam 10yr5/6
Boring Number 6_SurFace elevation_950.0_ Mottled Soil at_1.5_feet
0�" Dark brown loam 10yr3/3 H20 present at_X_
6"-18" Brown strong loam 10yr4/4
18"-30" Rusty brown loam 10yr5/6
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 11:17 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot 1, 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 10yr3/3 •
Method of scratching side wall: Knife
Depth of gravel in bottom of hote 2 inches:
Date and hour of initiat water filling 10/13/03 At 3:00 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
11:27 11:42 6" 2.1 7.1
11:48 12:03 6" 2 7•5
12:06 12:21 6" 2 7.5
AVERAGE PERC. 7.3 MPI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 11:17 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot�, Bik 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
ag�� Dark brown loam 10yr3/3 •
g��_12�� Brown st�ong 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 10/13/03 At 3:00 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
11:28 11:43 6" 3.5 4.3
11:49 12:04 6" 3.5 4.3
12:07 12:22 6" 3.5 4.3
AVERAGE PERC. 4.3 MPI
Percolation Test Data Sheet
Lic.#S10
Percolation test readings made by: Rusty Olson's Perc. starting at 11:17 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot�., 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
0-10" Dark brown loam 10yr313 �
10"-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 10/13/03 At 3:00 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
11:29 11:44 6" 0.6 25
11:50 12:05 6" 0.5 30
12:08 12:23 6" 0.5 30
AVERAGE PERC. 28.3 PI
Percolation Test Data Sheet
Lic.#810
Percolation test readings made by: Rusty Olson's Perc. starting at 11:17 A.M. On 10/14/03
Location: 3250 Fox Street Proposed Lot�, 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
ag^ Dark brown loam 10yr3/3 �
g°_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 10/13/03 At 3:00 P.M. depth of initia�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
11:30 11:45 6" 2.3 6.5
11:51 12:06 6" 2.2 6.8
12:09 12:24 6" 2.2 6.8
AVERAGE PERC. 6.7 MPI