HomeMy WebLinkAbout1977-11-13 Soil Percolation Test Report6;0-7 -
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1040 Garland Lune w9
xayseta, znn ss ota 55391
Noveaoer 13P 1971
//-d;Ve77 :dr. William Parmoll
ffiep -860-3r�,wn Road P00A
L4% Lake, Ainnesota
ilei I-iproveaent to drainfield at Oft Brown Road
rear Sirs
In tte interest of 1,2grovire the oreration of the
dre! n.'i eld on -?sur prorerty, I have a or►ducted some,
Pere o! *•tion tests erd wrsined tt-e site for the
purpose of constructing remedial facilities.
?roe our initial conversation, I learned that the
existing s jets=, wt -J& war built to an effective
absorpti om area of W square feet has been unable
to dispose of the septic tank effluent during periods
of heav-y water usage.
T" a percolation tests (3) were in the range of 120
to 130 ai-stem per inch. While this rate is consider-
abli slower then our present minisoon rates for new
construction of conventional systw• it is Ai opinion
that t e drainfield is funotioniog proporlj# but ser-
iously undersized. I have mat with Mfr. Gregg ?re,ck of
.4cCombs Knutson, the Orono City Engineers at the site
to solicit his views on correcting the problem. Ar.
Franc reconended the addition of aDO eq. ft. of
drainficle to the present sytaa. I cosmur in this
reooamandetion.
since the area available for enlorgarsent of the 9.1stea
is somewhat lisdted. I propose that the additional
drainfield be constructed with a lee ainious depth of
filter rock under the distribution pipes. Zhe
Minnesota ibllutiens Control Agencies 3ulletin VPC --40
allows a 2D% reduction to arae for a 121 dept. of filter.
Ibis would result in an expansion drainfield of &JO sq. ft.
Please call if you have a%W questions on this matter.
• ver tW.
Car 1 W. Borg P. L
cc. Al 01aan 'lines. Rag. i75W