HomeMy WebLinkAboutSeptic System Info SEPTIC SYSTEM INFORMATION
STREET ADDRESS 1173/3 5 ()J (2 ,vC 4 )A
LOT 2_ BLOCK 1 SUBDIVISION (/)6?r7 3, i c 4 ,E}C eS
MONTH AND YEAR TESTING DONE j L(L1 / / 8 0
ITEMS ALREADY COMPLETED
PCc_C '7�sTS i � Sc, fit 1 6 S
NEED TO COMPLETE BEFORE ISSUING BUILDING PERMIT:
()BORINGS
OPERC TESTS
0/
SYSTEM DESIGN V 4 AS
VP f7i.
111% SITE PLAN, "
O OTHER
OCOMMENTS
DATE THIS SHEET FILED / .—/ 7` e BY 40 ti,jiZe
SUBDIVISION FILE NO. /007
HAKANSON professional engineers and surveyors
ANDERSON
ASSOCIATES, Inc.
P.O. Box 665 2665 4th Avenue North Anoka, Minnesota 55303 612/427-5860
July 24, 1980
Mr. William B. Moore
4701 West Branch Road
Mound, Minnesota 55364
Re: Moore Percolation
Dear Mr. Moore:
At your request, percolation testing was performed on part of the south portion
of your property located in part of the West 1/2 of the Northwest 1/4 of Section
7 Township 117 North Range 23 West in Hennepin County, Minnesota. Standard
methods of percolation testing were employed. Elevations are relative to an
assumed elevation of 100.0' based at a spike in the southeast base of a 3.0'
diameter oak (see enclosed sketch) .
This report includes:
1. Percolation test results
2. Soil boring logs
3. Testhole location sketch if
tri 4
4. Discussion and recommendations.
.t
Percolation test results are as follow:
Soil Material at
Hole Elevation Depth(inches) Bottom of Hole Percolation Rate(min/in)
#1 100.6 26 Clay loam 7.6
#2 103.2 28 Clay loam 6.0
#3 100.3 24 Clay loam 10.1
#4 103.8 24 Clay loam 7.6
#5 97.1 24 Clay loam 13.1
#6 97.6 24 Clay loam 12.4
Measured percolation rates are somewhat rapid for the texture of the soil material
in which the percolation tests were run. A more typical percolation range for
clay loam textured soils is 45 to 60 minutes per inch. Design factors for the
septic system for this site are based on this percolation rate range.
The soil boring logs show significant soil mottling begins at 5.0 feet depth
and 4.0 feet depth at Boreholes #1 and #2, respectively. Soil mottles. (spots of
contrasting color) are accepted indicators of periodic saturation in soils.
Because the City of Orono requires three (3.0) feet elevation difference between
the bottom of absorption trenches and the water table or soil mottling, a shallow
civil • municipal • planning • soils • land surveying
Mr. William B. Moore - 2 - July 24, 1980
trench soil absorption system is recommended for the site. The log of soil
boring 4#3 shows soil mottling and gleying begins at three (3.0) feet at the
alternate site. Soil gleying (dull gray soil color) forms in soils which are
saturated and in a chemically reduced condition for long periods of time.
The alternate site is unacceptable for a shallow trench system. The City of
Orono sewage code requires a mound, also known as the berm, system for this
soil condition; therefore, we recommend the mound as the replacement system
for the alternate site.
The required trench bottom area for a three bedroom house is 990 square feet.
The sewage trenches should be no greater than 1.5 feet deep. Effluent
distribution should be accomplished by drop boxes.
If you have any questions regarding information contained in this report,
please feel free to contact me.
Sincerely,
HAKANSON ANDERSON ASSOCIATES, INC.
N;.:710. S.
Gary J. athbun, Soil Scientist
GJR/jkw
Enclosures
File: 672.01
•
LOGS OF SOIL BORINGS
PROJECT: Moore Percolation FILE No, 672.01
0 - 3.0' 3" Hollow tube probe
BORING METHOD:3.0 - 6.0' 4" Flight auger DATE: _7/24/80
. i
Borehole #1 Borehole #2
DEPTH 0.0 ELEVATION - 102.2 DEPTH 0.0 ELEV ' o - 102.5
(feet) (feet)
Dark brown silt loam Dark brown silt loam
0.8
1.0
Grayish brown silty clay loam
1.2 Grayish brown silt loam to
1.5 silty clay loam
- Grayish brown clay loam
f �
Brown clay loam 2.7
Brown clay loam with few
yellowish brown mottles
i
47,4
4.0 4.O:.
Grayish brown clay loam with
Grayish brown clay loam ' .` few to many yellowish brown
mottles
5.0
Grayish brown clay loam with
few to many yellowish brown 5.5
mottles, few red mottles Grayish brown clay loam with I
many yellowish brown mottles,
6.0 6.0 many gray gleyed areas
END OF BORING END OF BORING
GROUND WATER NOT ENCOUNTERED. GROUND WATER NOT ENCOUNTERED.
E:;';A2M A ,DERSON ASSOCIATES, INC, BY: .,.moo - I 0--t--/-1""
•
•
LOGS OF SOIL BORINGS
PROJECT: Moore Percolation FILE No, . 672.01
BORING METHOD: 4" Flight Auger DATE: 7/24/80
Borehole #3
DEPTH 0.0 ELEVATION - 99.7 DEPTH E Vp •► -
(feet)
Dark brown silt loam
1.0
Grayish brown silty clay loam
to clay loam
1.5
Brown clay loam
3.0
•
Grayish brown clay loam with
few red mottles, many
yellowish brown mottles,
few to many gray gleyed areas
with depth
6.04 END OF BORING
GROUND WATER NOT ENCOUNTERED.
/
II:VATU ANDERSON ASSOCIATES, INC, BY:
LOGS OF SOIL EOR I NGS
PROJECT Moore Percolation FILE NO. 672.01
PORING METHOD 4" Flight Auger DATE 3/10/80 4
Borehole #1
Depth0..0 Elevation Depth Elevation
(feet)
Dark brown silt loam
1 .0
Grayish brown silt loam
2.0
Grayish brown clay loam
4.5
Grayish brown clay loam
with few red mottles
5.5
Grayish brown clay loam
with many yellowish brown
6.5 and red mottles
END OF BORING
{
GROUND WATER NOT ENCOUNTERED.
HAKANSON ANDERSON ASSOCIATES, INC . BY 44Z-_
2665 4TH AVENUE NORTH
P , O, Box 665
rr7n7
. .
if KA NSON engineers and surveyors
ANDERSON 812/427. 0
ASSOCIATES
P.O. Box 665 Anoka, Minnesota 55303
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