HomeMy WebLinkAbout1981-04-18 Septic System Design ReportI
SITR EVALUATION RSPOBT
JENSEN BOMSB
Lot 6, Block 2
MoCULLEY FARM
4-18-81
On April 15, 1981 six percolation holes were dug 6 inches in
diameter and 3 feet in depth. These holes were tested on April 17
at which time the soil borings were dug 6 inches in difaeter'to the
4 foot depth and 3 inches in diameter to the 8 foot depth, The per-
colation holes were dug with both a power auger and a bucket type
hand auger while the soil borings were dug with the hand augers,
The primary site is located west of the proposed house at the
toe of a steeper slope where quite a bit of bleak loam had been
deposited over the Tars. Because the better soil exists near the
surface a shallow trench system should be installed with the tren-
ches being no deeper than one foot in the natural soil. Also, since
the drainfield area is located at the toe of the slope an intercep-
tor drain should be installed above the drainfield to divert any
runoff water from entering the treatment area. This trench should
be a couple of feet lower than the drainfield trenches with drain -
tile being placed in the bottom and rook placed over the top. A
few inches of black dirt can then be placed at the surface to es-
tablish a grass cover.
Additional design information follows. If any other informa-
tion is needed, please contact me.
Sincerely.
PSRCORt INC.
Mark 13, Gronberg. P.R.
JEI32N HOMES
Percolation Results
Hole a No, Eat eria_l
r-1
Black
Loam
P-2
Black
Loan
r-3
Black
Loam
r-4
Black
Loam
r->
Brown
Sandy Loan
P-6
Brown
Loam
re-rcolation state
10.9 hin./inch
10.9
10.4
9.2
3.5
10.0
'ilia avert. -ad percol ration rat- ! tho prig~:ary sitell-µ) is 10.4 N-P-I,
he average pnrcointlon rate for the alternate site is 6.8 I.P.I.
Soil Bor i nas
Day th(r^T. i IIf 1
o.o-3.5 Bl�- jam
3.5-5.o Black Clay Loam
5.0->.5 Dk..Brn. Clay Loam
5.5-r.0 Yellow Brn. Clay Loam
7.0-8.0 Brown Sandy Clay(wet)
No water table after 24 hours and mottled soil at 'i feet.
J.B
2evthlf� Material
000- 0 0 Black Loam
4.0-6.5 Lt, Brown Clay Loam
6.5-8.0 Brown Sandy Clay
7.0-8.0 Brown Clay Loam
No water table after 24 hours and mottled soil at 'I feet,
:;.B. -4
Devth(PT.
0,0-2.0
2.U-5.>
-1.0
7,0-0.0
Matte
Black Loam
Bran Loam
Dk. Brown Clay Loam
Lt. Brown Clay Loam
Water table at 4.5 ft. after 24 hours and mottled soil at 4.5 feet.
J:MC, 0 HOMS
Svstem 14sign
le percolation Rate, Type of System
10.4 minutes p-tr inch. Shallow trench system.
2. Prono -.ad ' 1 ow Rato ajt
3 be -:r.ls U 150 G.P.D. : 450 G.P.D. 41 ISJe = 600 5 JJ
3. moil Treatment Area Required
Use factor of 1.61 times- 750 or-q50 sq, ft, of area.
r
� � 00 /000
-size and Pumbe of Trenches.
Use trenches 100 feet long and 2.5 feet wide for the required
aroa. Tronoheo should be spaced at least 7 feet center to center.
14
. Rook 3e uui re d
For 6 inches of rook below the pipe and 2 inches over the 4 inch
pipe '38cubic yards of rook would be required.
6. :optic Tanks Required
Two tanks should be used and be of at least 1000 gallon capacity.
"In addition, the second tank should have a pumping compartment to
allow for installation of a liquids pump to distribute the efflu-
ant to the higher drainfield area.
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