HomeMy WebLinkAbout1982-08-25 Septic System Design Reportr
SITS: EVALUATION REPORT
FOR MR. RAY HECK
LCT 1, BLOCK 1 FOX RID3E
August 25, 1982
Cn August 24-25, 1982 three percolation holes were tested
and two soil borings taken on the above lot to determine anoth-
er drainfield site to replace a failing one that presently ex-
ists. The present site sits in a low area with a high water ta-
ble and is also susceptable to holding runoff water from adjoin-
ing slopes. There was some higher ground to the east which we
looked at but decided that the good area was limited and quite
a few trees would have to home out along with poor access to
the site. Thus, we chose an area to the west of the house where
the soil was fairly good and access better. However, the exis-
ting well is fairly close which will have to be missed by at '
least 50 feet with the new drainfield.
All testing was done in accordance with the provisions of
the Minnesota Pollution Control Agency for IndiviC':8l Sewage
Treatment Systems. The percolation holes were dug 3.5 feet deep
and 6 inches in diameter, while the soil borings were dug 6 in-
ches in diameter to the 4 foot depth and 3 inches in diameter
to the remaining depth. The percolation holes yielded an aver-
age percolation rate of 221.7 minutes per inch whi^h is accep-
table for a s• adard system:. There is mottled soil at 5.5 feet
just under the sand layer whicl, would require that the trench-
es be at a maximwr. depth of 2.5 feet.
Additional system design, inforr,.ticn follows. 11' any otht'.-
information is needed, ple:;.se contact me.
S: ncerc]y-,
J1FaCCR, ItiC.
�!C O
1:,.rk Gront,(.rp-,, i .E.
LOT 1, BLOCK 1
FOX RIDGE
Percolation Results
Holes_ Material Percolation Rate
P-1 Brown Loam 40.0 Min./Inch
P-2 Red Brn. Sandy Loam 26.7 If
P-3 Brn. Medium Sand 4.4 it
The average percolation rate is 23.7 minutes per inch.
Soil Borings
S.B. # 1
De th t. )
Material
0.0-0.,
Black Loam
0.2-1.5
Gray Prn.
Loam
1.5-4.0
Red Brn.
Fire Sandy Loam
4.0-5.5
Fine Sand
5.5-7.0
Gray Brn.
Silty Clay
7.0-8.0
Gray Brn.
Clay Loam
Mottled soil ;at 5.5 f t. and no water table after 24 hrs.
S.B. # 2
Depth(f t.)
0.0-0.2
0.2-1.2
1.2-6.0
6.o-8.o
Material
Black Loam
Gray Brn. Loam
Red Brn. Medium Sand
Gray Brn. Silty Clay
Mottled soil at 6.0 ft. and no water table after 2t� hrs.
LCT 1, BLOCK 1
FOX RIDY
Svsten: Lesiyn
1. Percolt:tion Rat(-. Type cf Sycteiu.
23.7 minutes per inch. Standard System..
2. Proposed Flow Rate.
4 bedrooms L_ 150 G.P.D. is 600 G.P.D.
3. Soil Treatment Area Required.
1.67 factor x 600 G.P.D. is 1000 Sq. Ft. Minimum.
4. Size and Number of Trenches.
This will have to be worked out in the field since there are
some small crab apple trees and evergreens that are desired
to be saved. The trenches should be 3 feet wide to minimize
the number of trenches needed to obtain 1000 sq. ft.
5. Drainfield Rock Required.
55.6 cu. yds. of rock is needed to have 12 inches under and
2 inches over a 4 inch distribution pine.
b. Sentic Ta n)Ks .
Two septic tanks are be21Eved tc exist at the east end of
t::F house. If therie are in good shape they can be used. How-
ever, a will be needed to .end the effluent to the High-
er drainfield area. Thus, a seperate tank will be needed to
house the pump. Also, an alarm device should be installed to
warn of pump failure.
7. Additional Information.
It appears that a small berm was constructed to the west of
the proposed site when the subdivision was made. The trenches
could extend into this area a little if they were down in the
natural soil.
LOT / , BLOCK /
�c
J J
M3 •r _ � I IFZEx,�.uG
10 tL • I I ' O.f •iNfKLD
2
ORiv�fK,U "`
AREA Z�) s��',,,
CC=LLInn li' • 7n0
27n Ai46
Oil
8�ZS � 82
�c /Eo'COLAT/Dxv AMC
S.