HomeMy WebLinkAbout038-1202-70-000 (2) Wisconsin Department of Commerce SOIL ,J ----� fJRT Page_1 or
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In accordance with Wis.
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Attach complete site plan on paper not less than 8112 x 11 i ched in size Plan must
Include,but not limited to:version and horizontal reference M},direction a g�° _ I p D3 D Y l�0 2-�
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General comments
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SBD.8330(R.6/00)
Soil Test Plot PIa
Project Name Ronald Wohlers Sha ird
Address 1282 200th Ave
N ew Richmond WI 54017 M #226900
Lot 12 Subdivision Wohlers Estates Date 8/16/00
SW/SE 1/4 SE 1/4S 23 T 31 N/R 18 W Township Star Prairie
Boring Q Well PL Property Line County ST. CROIX
BM or VRP Assume Elevation 100 ft. Top of Survey Iron
System Elevation 97.0 *HRPSame as Benchmark
Alt. BM Top of 1 1/2" Pipe @ 100.8
Pro Town Road
Tested area does not have enough
slope to establish contours
<1% B-2
Slope 20'
B-3
80'
a�
40'
a
30' -1 r
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80'
Alt.
#4 lip B.M.
190' Property Line 0 10
•-� ST. CROIX COUNTY
WISCONSIN
..�/'•� w. ZONING DEPARTMENT
N ■ r■
goes. ST.CROIX COUNTY GOVERNMENT CENTER
1101 Carmichael Road
Hudson,WI 54016-7710
Phone: (715)386-4680 Fax(715)386-4686
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Memo to File
From: Pam Quinn
Date: 4/27/2004
Re: Sandy loam structure misinterpretation on subdivision sat r its
Recent soil on-site determinations have brought a problem to our attention. During these on-
sites,boHngs were ex vated to confirm soil conditions where.two conflicting soil reports had
been submitted for zonA department review. The soil profiles, evaluated by myself,Dave
Fogerty,and Dave Steel(all certified soil testers)differed from the original soil reports in that
massive(structureless)sandy loams were encountered in horizons that were described as having
either moderate, medium subangular blocky(2msbk)structure by Adam Schumakei4VAVcal4
There apparently has been a
misunderstanding between"structure"caused by handling samples of the soil during texturing
versus the soil characteristics in situ. The soil, when chunks were taken out of the profile to hand
texture,with pressure parted into"crumbs"that appeared at first to be subangular or granular in
shape. However,these were not true peds that broke apart along planes of weakness,but
fragments created by handling. The soil when observed in the horizon did not have distinct units
of structure and should have been reported as"massive".
Added notation: on 4/23/04 Mark Iverson(Cedar Corp. certified professional soil scientist),
Shaun Bird, and myself did an evaluation of soils on Lots 6 &9,Richmond Meadows where the
original soil report described the third horizon as sandy loam, "I mgr". On Lot 6 we checked
soil profiles within a POWTS distribution cell and then excavated a test pit on Lot 9. The sandy
loams in question were a weak, coarse to very coarse subangular blocky structure,where planes
of weakness were just discernible when peds were parted from the profile. The peds separated
faces in the Lot 9
observed on the ed fa
with ve light pressure b soil tester. Sand coatings were P
rY �P Y g
soils,which supported the determination that some structure existed to allow water to move
o pp
through the upper portion of the sandy loam horizon. However,below the weak-structured soil
we found massive(structureless) sandy loams and the boundary between these horizons was
irregular,which would mean a distribution cell could encounter alternating weak and massive
sandy loam. Shaun said he would amend his soil reports with a memo recommending that any
s + t+ A&,,'1mgeor,'2xa W ,bc assigned a lower;loadW990WOf .
(see attached memo fbt'Vf dtdWt Meadows)to provide a larger dispersal area.
r i
Page Two—Soil Memo 4/27/04
Massive sandy foams have been assigned a soil application rate of,0.2 gpd/fe with the code-
,hanges in Comm ,motive as of 2/1/04. The application rates listed gn the.s'Wl reports
were higher due to the structure having beam described as'e ithe-i*e ak or mo+derate,:whidft affects
the calculations for sizing of POWTS distribution cells. Obviously, one of the concerns is to
make sure loading rates for the soils are not in error and allow undersized POWTS to be
installed. For example, in December 2003, Lot 35 of Richmond Meadows subdivision had to
have its loading rate reduced to 0.3 gpd/sq. ft. when the installer encountered massive sandy
loam at the system ys elevation. The sandy loam horizon had been described on the soil report as
"1 mgr"with firm consistence.
Leroy Jansky,Dept. of Commerce Regional Wastewater Specialist, has been consulted on this
situation and advised the zoning department to require on-site verifications for any lots with this
potential misinterpretation on the soil reports. All soil reports with sandy loam"1 or 2 mgr"as
its structure will be required to use a design based on the current code's soil application rate for
massive sandy loam @ 0.2 gpd/sq. ft. unless additional soil testing proves otherwise.