HomeMy WebLinkAbout1977-06-13 Septic System SpecificationCJU .... I I 19H
VILLAGE OB OROtia
June 13, 1977
545 Indian Mound
Wayzata, Minnesota 55391
(612) 473-4224
Mr. Lee Primus
4535 East LaJce Harriet Boulevard
}linneapolis, Minnesota 55409
On-site sewage treatment system. Lot - part of Parcel
2300, Section 6, T117, R23, Orono, Minnesota
Dear Mr. Primus:
Enclosed are drawings and specifications for an on-land sew
age treatment system for the above referenced site.
On June 9 and 10, 1977 percolation tests were conducted on
the above mentioned property at the location described in the
Figure 1 of the enclosed drawings. Testing consisted of one
soil boring to a depth of six feet. Soils encountered in the
soil boring were black loam over brown clay over sandy brown
clay over brotm clay. No groundwater was observed in the soil
boring after 24 hours.
The percolation for the test holes averaged 36 minutes per
inch.
Stated percolation rates are those occurring at the location
shown, and no guarantee is In^lied or expressed that these
conditions exist for the entire proposed drainfield area.
If we can be of further assistance please adyise.
Sincerely,
EUGENE A. HICKOK AND ASSOCIATES
Philip Piifs ^
PP/lg
Enclosure
cc H. Muhick
McCombs - Knutson
4
SPECIFICATIONS
PROPOSED ON-SITE SEWAGE DISPOSAL SYSTEM
MR. LEE PRIMUS
LOT - PART OF PARCEL 2300, SECTION 6, T117, R23
ORONO, MINNESOTA
SEPTIC TANK -It is recommended that the system include
two septic tanks in series (each at least
1000 gallons capacity.) Any new septic tanks
shall be installed in accordance with Village
Code.
DOSING CHAMBER -One 250 gallon capacity dosing chcuober down
stream from the septic tank or tanks mem-
ufactured cuid installed in compliance with
Village Code, including a siphon or pump
with a disch2u:ge rate between 25 and 45 gpm.
(The purpose of the dosing chamber is to
deliver septic effluent to the drainfield
in periodic doses, rather than in smaller,
more frequent applications.) See Figure 2
for location.
DRAINFIELD -For a percolation rate of 36 minutes per
inch Village Code requires a minimum of 270
square feet effective drainfield area for
each bedroom.
Proposed total effective drainfield area is
900 square feet. Proposed drainfield trench
bottom width is three (3) feet requiring 300
lineal feet of drainfield line.
The system is to include three (3) 100 foot
lines where shown on Figure 2., These lines
are to be laid flat along existing contours.
The lines are to be placed ten (10) feet
from trees, where necessary trees shall be
removed.
Effluent is to be carried by a solid 6-inch
diameter, plastic pipe directly to the drain-
field pipes. All elbows and connecting pipes
are solid, 6-inch diameter pipe. The end
of each run of drainfield line is capped.
Trench details showing materials and install
ation are shown in Figure 3.
Figures 1 through 3, by reference, are made
part of these specifications.
MAINTENANCE SUGGESTIONS
SEPTIC TANK -
DOSING CHAMBER -
Inspect the tank annually and have the tank
cleaned when the scum is 3 inches or less
above the outlet baffle and/or when the
sludge level is 8 inches or less below the
outlet baffle.
If a dosing siphon is installed» the
avucillary vent should be cleaned annually.
If pumps are used in the dosing chamber, the
manufacturers maintenance schedule that comes
with the punqp should be followed .
11
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E A HICKOK & ASSOCIATES
HYDROLOGISTS - ENGINEERS
MINNEAPOLIS MINNESOTA
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TRENCHncnwn
NATURAL SOIL
COVER
6** DIAMETER
PERFORATED PLASTIC
PIPE-LAID FLAT ANO"
LEVEL
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UNTREATED
BUILDING PAPER
^ TO 3“ WASHED GRAVEL
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TRENCH SECTION
.NATURAL SOIL COVER
▼ crn • ^ lo**UNTREATED
BUILDING PAPER i
6“ DIAMETER - -4"T0 3‘* WASHED GRAVEL
E A HICKOX & ASSOCIATES
HYDROLOGISTS - ENGIN2ERS
MINNEAPOLIS MINNESOTA