HomeMy WebLinkAbout1986-06-17 Septic System Design ReportSYSTEM DESIGN
FOR FRITZ GULLICKSON
OF LOT 2, BLOCK 2, RINGERSWOOD
ORONO, MINNESOTA
1. Percolation Rate, Type of System.
5.4 minutes per inch, Pressure Mound System.
2. Proposed Flow Rate.
4 bedrooms @ 150 G.P.D. = 600 G.P.D.
3. Proposed Rock Bed Area Needed.
600 G.P.D. x 0.83 factor for using a minimum of 12" of clean sand under the
rock bed = 500 Sq. Ft. or a 10' x 50' rock bed.
4. Dike Measurements based on Basal Width.
Basal Width ratio = 1.52 x 10' wide bed = 15.2 feet-10 feet for the bed =
only 5.2 feet out. However, use minimum sideslope of 4:1 so the mound will
have to extend out about 15 feet on each side and about 12 feet at the ends.
Since there is over 2 feet o; good black loam soils some minor grading
could be done to level the area under the rock bed.
5. Septic Tanks.
Two septic tanks, of at least 1000 and 750 gallons respectively, are needed
in addition to a third pumping tank to house the pump. Also, an alarm system
is needed to warn of pump failure.
6. Distribution.
Distribution is to be by pressure to 3 perforated laterals in the rock bed.
These are to be spaced 40" apart.
7. Additional Information_
All construction and materials must adhere to the provisions of the City of
Orono. All construction traffic must be kept off both the primary and alter-
nate sites, and these areas should be marked off to ensure thin.
If there are any other questions, please contact me.
Sincerely,
PERCOR, INC.
AMa�r&Se'eo_n5eorg','� PCA certifie
PERCOLATION TEST DATA SHEET
Test hole location Cra t e- Hole number /
Date test hole was prepared � — / % - T t;, Depth of hole bottur, / S inches.
`imeter of hole, _— inches.
oil data from test bole:
Depth, inches Soil texture
Method of scratching sidewall__-scRAT CArR
:Jt th of pea -sized gravel in bottom of hole, L inches.
Da:e a-d hcur cf _nitial water filling 6 —13 ` 9-4 — 3 �,M.
Dept;; c_` initial water filling, / (, inches above hole bottom.
Hcthu_-; used to :.aintain at least 12 inches of water depth in hole for at least
4 hou s fir- f t L h
Percolation test readings made by _O__u: 6-
6 - 13 4 starting at W'
(date)
during :est, inche-.
on
. Yaximua water depth above hole bottom
me
71r,e I* :nterval, Heasurement, Drop in water
"mutes i inches I level, inches
i
Percolation
rate,
minutes per
inch
erarks
TP,
a
i I
t
tL�t
I _
Percolation rate j( ainutes per inch.
PERCOLATION TEST DATA SHEET
Teat hole location 6 U Z l c Le S 0A) Hole number 2
Date test hole was prepared � 12 - R6 Depth of hole bottoc,_2_� inches.
Diameter of hole, 4 inches.
Soil data.from test bole:
Depth, inches Soil texture
Method of scratching sldewall S C /l A-%C AZ%?
Depth of pea -sized gravel in bottom of hole, 2 inches.
Date ant hcur of 'initial water filling 6 /3 `6-4
Dept` cf initial 'water filling, inches above hole bottom.
yctho' used to =aintain at least 12 inches of water depth in hole for at least
L P�0Ur5
Percolation test rea'ings trade by fi D N
G - /3 - 1?4 starting at r s a.m.
(da:e) 'm
durfnE -est, s Inches.
/l u b. b t=
on
. Yaxim= water depth above hole bottom
Time i 1ntertia1 ' Measurement, Drop in water
Minutes inches level, inches
Percolation
rate,
minutes per
inch
Remarks
8
/U Irk —7
J
�.
I
Percolation rate u 2 Uinutes per inch.
• . PERCOLATION TEST DATA SHM s- ss
Teat hale location_ � 4 Sole number
Date teat hole was prepared — / 2 — PG Depth of hole bottom,, inches.
Diameter of hole, _j, _ inches.
Soil data -from test bole:
Depth, inches
Soil texture
Method of scratchinz sidewall .S C ifx 1 G A L R
Dtpth of :a -sized gravel in bottoz: of hole, 2r' inches.
Date and ; cur of initial .ater filling 4 — 13—t t 3, Q"' loom.
Depth cf initial water filling, / 6 inches above hole bottom.
Xctho-- used to aaintain at least 12 inches of water depth in hole for at least
L hours & FI'l, L
?ercolation test readings made by I�D/V GO- PelA-1h rZ'6— on
d — / 3 — 9 4 starting at �'� a.m. Maximum water depth above hole bottom
(date)
during :est, 3 inches.
i 7ime ; `
:ime f' interval, 'feasuzeWe:t,
nutes i inches
Drop in water
level, inches
Percolation
rate,
minutes per
inch
Remarks
OJ i L
.f I
c
' AI
Percolation rate minutes per inch.
LuKs ul ouii norings
B-27
kocation or Project G'az4 � r�('f✓�
Borings made by _fN,lt',i' /u,� (^1orA-y Date 6-/2'�6
Classification System: AASHO ; USDA-SCS C Unified other
Auger used (check two): Hand, or Power Flight _, or Bucket (Z: other
Depth, Boring number / Depth, Boring numberin
2
feet Surface elevation feet in Surface elevation
0 0
1
2 —
3-
4 —
5 —
6 —
7 —
8 —
41C4'.4,- eZAr .CAni
End of boring at V.0 feet.
Standing water table:
FRresent at feet of depth,
hours after boring.
Not present in boring hole i<
Mottled soil:
Observed at Z• 3 feet of depth.
Not present in boring hole
Observations and cor.•ments:
2 —
4 —
6 —
7 —
C=
End of boring at s' O feet.
Standing water table:
Present at feet of depth,
hours after boring.
Not present in boring hole X
Mottled soil:
Observed at —2. feet of depth.
Not present in boring; hole
Observations and comments:
SYSTEM DESIGN
FOR FRITZ GULLICKSON
OF LOT 2, BLOCK 2, RINGERSWOOD
ORONO, MINNESOTA
5-23-86
1. Percolation Rate, Type of System.
60 minutes per inch on the primary site. Pressure Mound System.
These rates were obtained by Carl Borg who tested the subdivi-
sion. This design is based on those rates only and it is agreed
that that these results have not been verified by us.
2. Proposed Flow Rate.
4 bedrooms @ 150 G.P.D. = 600 G.P.D.
3. Proposed Rock Bed Area Needed.
600 G.P.D. x 0.83 factor for using a minimum 12" depth of clean
sand under the rock bed = 500 Sq. Ft. or a 10' x 50' bed.
4. Dike Measurements based on Basal Width.
Basal Width ratio = 5.0 tirr2s 10' wide bed = 50'. Because the
average slope is slightly greater than 3%, the downslope width
can only be used and needs to be 50'-10' rock bed = 40' which
is also greater than a 4:1 slope, so is all right. The other
sides of the dike should be at least 4:1 slopes or out at least
12 feet.
5. Septic Tanks.
Two septic t%nks, of at least 1000 and 750 gallons respectively
are needed _. addition to a third pumping tank to house the
pump. Also, an alarm system is needed to warn of pump failure.
6. Distribution.
Distribution is to be by pressure to 3 perforated laterals in
the rock bed spaced 40" apart.
7. Additional Information.
All construction and materials must adhere to the provisions of
the City of Orono. All construction traffic must be kept off
both the primary and alternate drainfield sites, and these
areas should be marked off to ensure this.
If there are any additional quest_ons,
(i
�-L
please contact me.
Sincerely,
PERCOR, INC.
Mark S. Gronberg
PCA certified
#615 Ringer Subdivision
Page 3
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