HomeMy WebLinkAbout1983-08-11 Septic System Design Report-S-ITE EVALUATION REFORT,
FOR RON McCLOUD
/ 7� j N . FERNDALE
I NR6e, MINNESOTA
Iv G
On ;'al,y 5-7, 190j3 tw rec" n holes, 3 feet deep and 6 inches
in diameter, were tested and 2 soil borings were taken according to
the provisions of Individual Sewage Treatment Systems Standards
(WFC-4c) .
The present systeri is behind the house and had some extra trenches
added a few years ago. We tested an area to the west of the present
system and found the soils to be fairly loose and permeable, but that
the water table follows the slope of the hill down through the drain -
field, especially to the east.
Thus, the runoff water should be diverted from the present site
and-part.of the new trenches. It appears that if the rater is diverted,
the recentl7 constructed trenches could still be used, with extra
trenches being constructed to the west.
AdditionLi system design information follows. If any other in-
formation is needed., :,lease contact me.
Sincerely,
FERCOR, INC.
Nark S. Gronberg, 7E.
W.6
r.►
i'
RC:; McCLOUD
725 N . PERND„LE•
ORONO, MINNESOTA
Fercolation Results
Hole ro. Ebterial
r-1 Brown Lr,:jt.
F-2 Yellow Brown Locun
The average rercolL-tion rcte is 14.2 minutes per inch.
Soil 3orings
Fercolation Rate
7.6 Kin./Inch
20.3 "
S. B
e�T(f t.) Aerial ? ='
0.0-1. 2 D..rk Brown Loam
1.2-5. C Brown Login
5•C-7.0 Gray Brown Loan.
l:ottIed soil at 4.5 feet nd water table at 5.0 feet after 24 hours.
S.R. -12
c r-Tft N.
Material
0.r_ .3
Brown Sandy
Lossi:
0,3-3•5
ellow Brown
Loan.
3.5-5. C
bro;.-n Sandy
Lour.
-
5.0-6.0
mown Loa,, (rock
encou:.t�re3)
Mottled soil
�.t �.; feet ..nd no
water table Cr
2y hours.
RON NcCLOUD
System Design
1. Percolation Rate. Type of System.
14.2 minutes per inch. Shallow Trench System.
2. Proposed Flow Rate.
5 bedrooms 150 G.P.D. is ?50 G.P.D.
3. Soil Treatment Area RLquired.
1.27 percolation factor x 750 G.P.D. is 950 square feet minimum.
4. Size and Number of Trenches.
3 trenches, 3 feet wide and 106 feet long, is 954 square feet.
This might be able to be reduced by the amount of recently con-
structed trenches if runoff water is diverted from them. The
new trenches should be no deeper than 1.5'feet in the natural
soil, unless the water table is lowered.
5. Drainfield Rock.
53 cubic yards of rock is needed for 95.►; square feet to have
1- inches under end 2 inches over a 4 inch distribution pipe.
6. Sertic Tanks.
If the .resent tanks are in good working order, they can be
used. If not 2 tankn each of 1000 gallons #Ul be needed. It
appears a third pumping tank will not be needed.
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PERCOLATTnN TEST DATA SHEET
d-41
Test bole location_-- r Hole number__
Datr test Dole was prepareu ` _ Depth of hole bottom, inches.
Diameter of hole, inches.
So"ta from test hole:
Depth, inches
Method of scratchirR sidewall
Soil texture
�+ •fir c
- e �
2
X
Depth' of pea -sized gravel io bottom of hole, inches.
Oat(- and hour of initial water filling
Depth of initial water filling, inches above.loole bottom.
Method used to maintain at least 12 inches of water depth in hole for at least
4 hours
Percolationj test readings made by _ on
_ starting aL `. m. . Maximum water depth above hole bottom
(date) ---p.m.
during test. inches.
Time
Time
Interval,
Minutes
—
`teasrirement.
inches
_—
Drop in wat,2r
level, inches
Percolation
rate,
minutes per
inch
Remarks
r
�r
ILI
c
1
r
.,, Velbe fiation rate _ '7, 6 minutes per inch.
lti� r _ _
i
D-41
PERCOLATIC)N TEST DATA
SHEET
^CVC1OAfO
Hole
1'cst Dole locat ion_ __ __,
number--12-
I)atc test bole was prepared __— _ —._
Depth of hole bottom,
_ inches.
Diameter of hole, -- _ inches.
Soil data from test hole:
Depth, inches
Soil texture
1.1ethod of scratching sidewall __.
,fit• *'
.p.:.
Dept1,- of pea -sized gravel in bottom of hole,
inches.
�+,
' Date and hour of initial water f it ling
t
.Deprh of initial %Teter filling, — inches
above hole bottom.
`lethod used to maintain at least 12 inches of water
depth in hole for at
least.
`
4 hours
Percolation test readings made by —
-
starting al a.m.
Maximum water depth above hole
bottom
'
(date)
r
during test , — _ _ inches.
Time
Percolation
Time
I[,terval,
Measurement,
Drop in water
rate, Remarks
Minutes
inches
level, inches
minutes per
inch
0�
r11,4
ISM
/ '
7 �•��
Y
30
• "'
7 ��
7
,Percolation rate _ O,� minutes per inch.