HomeMy WebLinkAbout1977-04-29 Septic System Design ReportSOIL TESTING SERVICES OF MINNESOTA, INC.
2405 ANNAPOLIS LANE SUITE 280
MINNEAPOLIS, MINNESOTA 55441 612-559-1900
April 29, 1977
Van Eeckhout Building Company
1055 East Wayzata Boulevard
Wayzata, Minnesota 55391
Attention: Mr. Jerry Finnamore STS Job No. 91002
Re: Soil Percolation Test, 190 Cygnet Place, Orono, Minnesota
De; Sir:
We were retained by you to perform soil percolation tests on the above
referenced property. Six (6) soil percolation test locations were
augered to a depth of 3.0 ft. sleep on April 20, 1977. Water was
noted seeping into these holes on completion, and was noted to rise
to a depth above 0.5 feet to 2.5 feet within the percolation test
hole locations after 24 hours. In addition, five borings which were dug
to depths of 8.5 feet below the natural ground surface were filled by
water to within 1.5 feet of the ground level 24 hours after the completion
of the boring.
The soil encountered consisted of a surficial layer of black organic clayey
topsoil overlying brown sandy clay to clay-iy sand.
On the basis of the ground water observed, the si`e would be unacceptable
for an individual soil absorption disposal system since the ground water
level ;s less than 6.5 feet below the ground surface or les:; than 4 feet
below the drainfield trench as proposed. An alternative system such as
a mound system may be applicable at this site. A drawing showing details
William C. Kwasny, P.E. CHICAGO, PEORIA, ILLINOIS • WASHINGTON, D.C. • CEDAR RAPIDS-IOWA CITY, • Engineering Analysis/Reports
John P. Gneedinger, P.E • Construction Quality Control
Clyde N. Baker, P.E. DAVENPORT, UE TE, MIC, I GAN • INNE A, KANSAS • BAY CITY, DETROITGRAND • Foundation Boringsand Testing
James H. Overtoom, P.E. RAPIOS, MAROUETT F X, VIRGN • 9 GREEN BAIS, VIRGINIA, EE, W USA • Si.TON IN • Environmental Testing and
R. Eric Zimmerman, PhD., P.E MISSOUR! • FAIRFAX, VIRGINIA • GREEN BAY, MILWAUKEE, WAUSAU, WISCONSIN Evaluation g
R. W. Weinfurter, P.E MADRID, SPAIN • BANGKOK, THAILAND
Van Eeckhout Ruilding Co.
April 29, 1977
Page two
of such a system is attached.
We recommend that an intercepting French draw system be installed around
the site to effectively intercept lateral ground water flow from the east
and south. Such accumulation of water could flow by gravity to lower
elevations at the northwest corner of the site.
If there are any questions or if we can be of any further service, please
do not hesitate to contact us.
Very truly yours,
SOIL TESTING SERVICES OF MINNESOTA, INC.
James H. Overtoom, P.E.
Registered Professional Engineer, Minnesota
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SOIL TESTING SERVICES
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Al Olson
City of Orono
P.O. Box 66
Crystal Bay,
Subject
Dear Al:
I
COMBS-KNUTSON ASSOCIATES, INC.
CONSULTING ENGINEERS ■ LAND SURVEYORS ■ SITE PLANNERS
July 28, 1977
Minnesota 55323
Septic System Application
190 Cygnet Place
p
1!;G 1 1377
VILLAGE 08 OROMU
As requested, we have reviewed the subject septic system
application which included a si`e visit. As you are aware,
the applicaion is for a mound system since there is a high
ground water condition. Currently, the mound system is unaccep-
table in Orono. However, under the "proposed" variance, and the
associated requirements would be applicable. I believe that the
existing application may also be filed as a variance to the
current code, and it is under this premises that I have reviewed
the technical data.
Initially, we recommend that the applicant have percolation
tests conducted in top layer of soil that is unsaturated. If
the percolation rate in the top twelve inches or more of natural
surface soil is within 30 to 60 minutes per inch, the site can
be considered acceptable if the depth of ground water is greater
than 2 to 3 feet. If the general site area has a slower per-
colation rate or the ground water is generally less than 2 feet,
we would recommend denial of the application.
Until that time at which percolation tests and additional
groundwater depths are submitted, we cannot complete our review
of the application. Actual test results should be included in
the requested information with a lot map indicating the location
of the tests. Also, the system layout, including the basis for
the design, should be submitted; and an alternate site should be
identified and investigated in the application, as required in
the code.
12805 OLSON MEMORIAL HIGHWAY, MINNEAPOLIS, MINNESOTA 55441 TELEPHONE (612) 559-3700
22 NORTH MAIN STREET, HUTCHINSON, MINNESOTA 55350 TELEPHONE (612) 879-8029
SOUTHWEST ENGINEERING DIVISION, MARSHALL, MINNESOTA 56258 TELEPHONE (507) 532-5820
ID: Greg Frank, City Engineer
FROM: A. P. Olson, Asst. Zoning Administrator
DATE: July 14, 1977
SUBJECT: 190 Cygnet Place
Please review and cones nt on the enclosed septic system evaluation and
design report. The contractor indicates that he proposes using 2 -
1,000 gallon tanks and 600 sq. ft. of drainfield, but note that no perks
were possible with water filled holes.
Nw
Van Eeckhout Building Company
1055 East Wayzata Boulevard
Wayzata, Minnesota 55391
Attention: Mr. Jerry Finnamore
SOIL TESTING SERVICES OF MINNESOTA, INC.
2405 ANNAPOLIS LANE SUITE 280
MINNEAPOLIS, MINNESOTA 55441 612-559-1900
August 15, 1977
STS Job No. 91002
Re: Soil Percolation Test at 190 Cygnet Place, Orono, Minnesota.
Gentlemen:
As directed by your authorization of August 10, 1977, we have completed the
soil percolation test at the above referenced property. Six (6) soil percolation
test locations were augered to a depth of 3 feet deep on August 12, and tested
on August 13, 1977, in accordance with the methods designated by the Minnesota
Department of Health, 1971.
The attached iog sheet indicates the observed percolation rates at each of the
test holes (P-7 through P-12). The observed percolation rates at each of the test
holes was within the maximum allowable rate of 60 minutes per inch, as recommended
by the Minnesota Department of Health. Based on these observations, the installation
of an individual soil absorption system will be acceptable in the area tested.
In addition to the above percolation test holes, a single boring was drilled to
a depth of 6.5 feet below the existinq ground surface to determine if the water table
is less than that depth. According to the readings obtained, it is our opinion ._hat
the level o. the ground water at the time of the testing was below that depth.
William C. Kwasny, P.E.
John P. Gnaedinger, P.E
Clyde N. Baker, P.E.
James H. Overtoom, P.E.
R. Eric Zimmerman, PhD., P.E
R W Weinfurter, P.E
CHICAGO, PEORIA, ILLINOIS a WASHINGTON, D.C. a CEDAR RAPIDS-IOWA CITY, a Engineering Analysis/Reports
DAVENPORT, DES MOINES, IOWA a WICHITA, KANSAS a BAY CITY, DETROIT, GRAND a Construction Quality Control
RAPIDS, MARQUETTE, MICHIGAN a MINNEAPOLIS, VIF..GINIA, MINNESOTA a ST. LOUIS, a Foundation Borings and Testing
MISSOURI a FAIRFAX, VIRGINIA a GREEN BAY, MILWAUKEE, WAUSAU, WISCONSIN a Environmental Testingand
MADRID, SPAIN a BANG OK. THAILAND Evaluation
Mr. Al Olson
July 28, 1977
Page Two
We further recommend that the attached pages as well as
a copy of the city's existing code be forwarded to the applicant
and the applicant's soil consultants, Soil Testing Services of
Minnesota, Inc.
Very truly yours,
Mc BS-KNUTSON ASSOCIATES, INC.
1�
Gr F ank, P.E.
GF:sw
Mr. Jerry Finnamore
Aujust -15, 1977
Page two
Fluctuations in the water level may occur over a wide range, depending upon the
amount of precipitation, evaporation, surface runoff, and infiltration which will vary
with seasonal changes.
Based on the toyt results, installation of an individual soil absorption disposal
system should be acceptable for a recommended design rate of 60 minutes per inch,
requiring 330 square foot of absorption area per bedroom. The observed water table
in the area is at a depth greater than 6.5 feet below the existing ground surface,
making an absorption system acceptable according to State Code Regulations.
The provisions of the "Ordinance and Code Regulating Individual Sewage Disposal
Systems" (1971), as recommended by the Minnesota Department of Health, as well as any
local ordinances and codes, should be followed in the design and installation of the
disposal system.
If there are any questions with regard to this report, please do not hesitate
to contact us.
Very truly yours,
SOIL TESTING SERVICES OF MINNESOTA, INC.
James H. Overtoom
Registered Professional Engineer, Minnesota
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