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Mike Gaffron, Septic System Inspector
Kay 16, 1978
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SUBJECT: Septic Systems - Soil Testing, Stielow Subdivision
A review of the soil testing information submitted by Hickock
and Associates for the Stielow Subdivision leads me to the
following conclusions:
Lot 1 - Percolation rate 11 min./inch; 5 min./inch at secondary
site; water table at 2-4 feet; mottled below 3 feet. Water table
is too high for a standard system. Slopes of 6-12Z on the primary
site are too steep for a mound system. Possibilities for this
lot are: 1) a mound system in the secondary dralnfleld area;
2) holding tanks; or 3) declare the lot as unbuildable.
^ I Lot 2 - Percolation rate 24 min./inch; 23 min./inch at secondary
* site; water table at 3-7 feet. Primary site is near or within
existing drainfield. Slopes of 0-6X. Due to high water table,
a mound system or shallow trenches would be necessary.
^ ^Lot 3 - Percolation rate 83 min./inch; 83 min./inch at'secondary
site; water table at 3-7 feet; slopes of 6-12X. High water table
Indicates standard trenches will not be acceptable (soil mottling
at 5 ft., 3 ft., and 1 ft. indicate a high seasonal water table).
Slopes are too steep for a mound system, and perc rates are too
■ slow for shallow trenches. I believe it may be possible to install
a mound to the southeast of proposed drainfields where the slope
is more level. Additional testing would be necessary.
W ^Lot 4 - Percolation rate 100 min./inch; 33 min./inch at secondary
' site. The lot is presently being retested to find a more suitable
site.
^ Wlot 5 - Percolation rate 27 min./inch; 53 min./inch at secondary
' site. Water table at 8 ft. Soil mottling below 6 ft., slopes
4-12X. A standard system could be installed on this lot.
f ^^jot 6 - Percolation rate 67 min./inch; 30 min./inch at secondary
^ ^ site. Water table at 3.5 - 8 ft. Mottling at 3.5 ft. A mound
system would be necessary on this lot due to high water table and
slow perc rate. ^ ^
. *ttay 16, 1978
' Stlelow Subdivision
Septic Systems - Soil Testing
Page 2
7 Lot 7 - Percolation rate 63 min./inch; 45 min./inch at secondary
site. Water table at 4.5 - 7.5 ft. An existing system is located
in generally the same area. If a new system became necessary the
site would be marginal for standard trenches and would possibly
* require a mound system or shallow trenches.
^ ^ Lot 8 - Percolation rate 40 min./inch; 25 min./inch at secondary
site. Water table at 8 ft. Mottling indicates seasonal water
table below 2-1/2 ft. Slopes less than 12X. This lot may require
shallow trenches due to high seasonal water table.
Q QfLot 9 - Percolation rate 59 min./inch; 50 min./inch at secondary
site. Water table at 2.5 - 4.0 ft. The lot is being retested
to find a more - - - - - - - - - - -
Lot 10 - Percolation rate 8.7 min./inch; 14 min./inch at
r * site. Water table at 3 - 8 ft. Mottling at 2-1/2 feet.
I trenches or a mound would be recommended for this lot.
secondary
Shallow
n OLo^T^^Perc^ation rate 111 min./inch;
site. Water table is at 2.5 - 3.5 feet,
to find a more suitable site.
idary J
low
6.8 min./inch at secondary
The lot is being retested
II 1-2 • Percolation rate 8.3 min./inch; 9.9 min./inch at secondary
site. Water table below 8 ft. on primary site. Some mottling
below 3 ft. Standard trenches would be allowed on this lot.
“ Percolation rate 15 min./inch; 36 min./inch at alternate
' ^ site. Water table below 8 ft. Standard trenches would bw allowed.
An existing drainfield is located somewhere to the south of the main
church building.
Sumnary:
Standard systems could be Installed on Lots 5, 8, 12, and 13.
Shallow trenches or a mound would be needed on Lots 2, 3, 6, 7,
and 10. Lot 1 would require either a mound or other Innovative
system. Lots 4, 9, and 11 are being retested.
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