HomeMy WebLinkAboutseptic testing for subdivision -•:-: .
SEPTIC SYSTEM INFORMATION
I r
STREET ADDRESS /0 Z 5- e9R.Q61cis25 J--- itve _....
1 LOT ;7 BLOCK /
MONTH AND YEAR TESTING DONE v4AAAS1- I dis
, -
ITEMS ALREADY COMPLETED
v
, . t
! ,
NEED TO COMPLETE BEFORE ISSUXING BUILDING PERMIT:
'BORINGS 3 't
i
(DPERC TESTS t
i
1
CRJWILTEN DESIGN • +,;,: ,.;:..
i
t
SITE PLAN
(
. t
0 07,1:011,
--___
deber.ww*.•••••••••6•PoT
...,.., * er
f
DATE THIS SHEET FILED , . DY
t" I
t'
5 tit 6 b 10(i• J - '-'" i .
{
•
r ") � r tF"il 1 i
An Expansion ofS Engineering Services Inc. R j" • ' ; )
6 cdvcda 6tZ
l' u.,,Sf`•�on"C.;
x:33 S.county N.111,P.O.Boz 35!%, !612fi41.56370 �-
U 3210 G.Itch Ammo,M.iUrj.124.55743!2181,23Z:09F.K a fVec.:ato vrn r
(i Cao in [1 i;Li;Z:;:itii NO Oa*Manus No..&.Ckoutt.ktn.6 1/1112.2534S40
C.¢.m nose v.t_ vY.,h�s•* .-.
1
August 31,_1978
Centurion Company
15500 Wayzata Blvd.
Suite 742
Wayzata, Minnesota 55391
Attn: Mr. Richard Neslund
Re: 77-510A TESTING FOR SUBDIVISION
APPROVAL
Orono Oaks Subdivision
Orono, Minnesota
Mr. Neslund:
4
As requested, we have conducted a complete series of perco-
lation tests , in accordance with City of Orono ordinances
to assist in evaluating the soil and soil absorptivity for
individual sanitary systems for each of the lots in the above
subdivision. Soil borings were also conducted in a few of
the lots, where equipment. access was possible , to determine
the general soil types and water conditions .
The locations of the borings and percolation tests are as
' shorn on the attaches sketches. Field locations were deter-
mined
by topographical features as well as staked lot corners.
Surface elevations were interpolated from the contour elevations
shown. on .the, preliminary plot furnished.
Investigation Methods
Heavy brush, trees, and slopes made it possible to conduct
only a few of the borings, as well as percolation tests using
a CME-45 truck-mounted power auger unit . These features made
it necessary to drill a majority of the tests with hand augers .
The soil classifications and depths as shown on the logs were
inferred from the soils brought to the surface by the continuous
flights of the auger. The depth of strata changes is thus
considered approximate.
CONSULTING ENGINEERS/SOILS AND MATERIALS
Tsst Germ-^.•Foundnt+cn Enpinnannq and iib commnnel Lvon3•In;psction o4 Conturctwn•MAN.&-lemony of Sods.Conueta and t3uddmy Component3
77-510A
Centurion Company -2- PuF.r_,t. 31 , 19i8
�-. .
Mineral soils encountered in the borings were visually and
- manually classified in the field by the crew chief in accor- '
`"'= dance with ASTM D2487 "Unified Soils Classification System"
and ASTM D2488 "Recommended Practice for Visual and Manual !'
Description of Soils". A copy of ASTM D2487 is attached.
_1 All samples were then returned to the laboratory for veri-
fication of the field classifications by a Soils Engineer.
Representative samples will remain in this office for a
period of 60 days to be available for your examination.
Percolation tests were conducted in accordance with City of
Orono procedures in the City of Orono Ordinance. Those pro-
cedures indicate that 4 percolation tests are needed for the
primary drain field area with 2 additional tests for drain
field expansion area.
Each of the boring completed was probed immediately after
completion for the presence of groundwater, with a final
,i J probing conducted in each boring approximately 24 hours later.
1 Results •
The Log of Soils encountered in the borings conducted and
water level observations are shown on the attached Log of
Boring sheets. Soil conditions throughout the tract are
highly variable with silty clayey sand, clayey sand and
sandy or silty clay till predominating. Slightly silty or
silty sands were also encountered at various locations . Top-
soil thickness is also quite variable, ranging from as little
as 1-inch to 3 feet.
Only three lots were accessible to power equipment to permit
taking boring of sufficient depth to reliably identify the
soils and open a large hole to permit repeated probing for
groundwater. Dense trees and brush make the remaining areas
j both inaccessible to conventional power equipment and make
taking borings by hand methods extremely difficult because
of the presence of roots . Our firm operates some large truck-
mounted drill rigs which after some chain sawing of larger
trees, could easily gain acces to all areas of the subdivision.
This equipment,• however, would substantially clear a path as
7 it progresses through This would have very undesir-
.J
. able environmental a ecstatic 'mpact on the property at this
time. It would not to, in all cases , select a path
i which would need to be cleared for future driveways since the
i location of driveways will be a decision left to future buyers
i . of the individual lots. To prevent irrevisible damage to the
property, we thus based our conclusions on borings taken,
general soil map data, and an analysis of the topography.
, ' Where borings were performed, groundwater was encountered only
in Lot 12, at the 7 and 8-foot depths , corresponding toelevation
941-944. pr-71
I _1 1! I, - -"
/ 1
S E s f''.i C 4 a u::i
1
77-S10A
Centurion Company -3- Aaii}U3 t 11 , 1 Vis;
•
Through visual observations of the topography, three wetland
areas are evident on the tract. Th: seasonal high water levels
for those wetlands appear to range from 950± to 958±. The
designated drain field areas in Lots 1 through 5 and 7, adjacent
to those wetlands will be from 8 to 20 feet higher in elevation
from that of those seasonal high water levels.
Based on data available, as well as observations and analysis,
it is our professional opinion that groundwater conditions in
designated drain field areas are well within City of Orono
ordinance requirements.
Sanitary System Analsis
The attached tabulation and sketches indicate areas where
satisfactory percolation results were obtained in both primary
and expansion areas on each of the lots. It is our professional
opinion that those results indicate that a conventional drain-
field system mestji .� na. ce c 11ha �A•ca'*p
nrs- *f rn,.J.!? An exception is Lo where results average
oaeuhat higher than permitted for a conventional system. A
mound system can, however, be desi ned fo ,,, •
;. e .
design of ail systems must await finalization of drain field
locations, and determinations of the number of bedroom:, in
individual houses.
Gc:noral Remarks
Upon establishment of •final development plans and city approval
we will be pleased to develop- the necessary drain field designs
for each lot required by the City of Orono.
If we c<<n be of further assistance in evaluating these data,
kindly contact us at your convenience.
Very truly yours,
IP UN ENGINEERI 4 Tv TING, INC.
i ee
i/Denni, h,. Riots el
---3rri,-' j' ing Assistant
I,...sidcnt
1} :1:,/JGD:11s
cc McCombs--Knutson Assoc. , Inc.
Attn: Mr. Dick Knutson
77-510A DRAYtaF3ELD INVESTIGATION
_ J Orono Oaks Subdivision
Orono, Minnesota .
•
.S RATE tiVIN ^ ,._ P
HP
SOIL @ TEST DETt "P"P" "H
"d
LOT TEST ELEV.ELEV. . 'a�_._. -----------
.
1 P-1P 960± Silty Clayey Sand '51-SC) 60 e
P-2P 963t Silty Clayey Sand (SM-SC) 44 42
P-3P 963± Silty Clayey Saud (SM SC) 48 ,
P-4P 956± Sand, Slightl' Silty (SP-SM) 15
-, P-SE 9612 Sand, Slightly Silty (SP--SM) 20 20
P-6E 9631 Sand, Sligbtly Silty (SP-SM) 20
J 2 P-7P 9613 Clayey Sand (SC) 60
i P-8P 9663 Silty Clayey Sand (SM-SC) 3260 53 k
P-9P 9671 Clay2y Sand (Sc) 60
P-10P 962± Clayey Sand (Sc)
P-11E 960± Silty Clayey Sand (SM-SC) 38 49 49
P-120 9601 Clayey Sand (SC)
.-' 3 P-13E 963± Silty Clayey Sand (SM-SC) 32
32
P-140 9643 Silty Clayey Sand (SM-SC) 48 54
P--15P 955± Clayey Sand (SC)
_i P-16P 961± Clayey Sand (SC) 60 54
P-17P 961± Clayey Sand (SC) 60
P-18P 954* Clayey Sand (SC) 48
J 4 P-19; 9763 Clayey Sand (SC) 60 is
P-20P 9762 Sand, Slightly Silty (SP-SM) 15 34 t
P-21P 9751 Sand, Slightly Silty (SP-SM) 10
s. P-22P 9783 Clayey Sand (SC) 52
P-230 9742 Clayey Sand (SC) 48 40
P-240 975± Clayey Sand (SC) 60
5 P-25P 983± Sand, Slightly Silty (SM-SC) 15
I'-26P 983± Sand, Slightly Silty (SM-SC) 10 13
P-27P 9833 Sand, Slightly Silty (SM-SC) 10
P-21? 983± Sand, Slightly Silty (SM-SC) 18
Y-2r2 ' 9861 Silty Clayey Sand (SM-SC) 48 48
P-36;; 986± Silty Clayey Sand (SM-SC) 48
6 P-31P 98t± Silty Clayey Sand (SM-SC) 60
, P-32P 9781 Silty Clayey Sand (SM-SC) 28 46
P-33P 9001 Silty Clayey Sand (SM-SC) 34
P-34? 9823 Silty Clayey Sand (SM-SC) 60
• F-35E 9532 Clayey Sand (SC) 48 69€;;'
P-3SE 9841 Sandy Clay (CL) 90
_.r Alm .r"'"""rnstaa� ww ssen '
l20
7 P-37P 9681 Sandy Clay (CL) ( :'
P-381' 967± Sandy Clay (CL) 24040 10$
-J P.-39P 970± Silty Clay<ay Sand (SW-SC)
P-40P 9691 Silty Sand (SM) 12022 18i
j
P-410 9F,5± Silty Cla,ey Sand (SM-SC)
24x0
® P-42E 96'6± Silty Clay (C'L) iii
.n X+"
^..-+.:SfCfl6{:1:L::':::Y:J'6E79JCIIc:g; ;4,s.u"'1.:;,..:.;f9 W3'gwc1.5"�4e�.�.R,.x'diP.'tL!;e49,.JwY .i.S,':3IfiLt+1L'It: ..t.:....; .axt..w'. iz:,vz-
:
/ is
l r.. / \l ''''''‘. --3 : ..... t
1'1 • 1 l' 1 \ . 41%*‘1 1 ,, 1.
lit 1
"4. 1( s.,
1
, '0 --1 ,�� „v., .
• ,,
. , ,
c,._
,i .
. ,----
NI., %. E,
L ..,
o •
/ /_ ,
-..d
R i.:
, t\11 .
i M
t
,-j ® j -,i� I it
e
s. ' tea it
1! \
1.4:1,,,, il t
1,A . 1,11,1\ \ hi !
F �i Y !v k I-- oh
t"
t 1 1 •
'C.
+�sns `` + k
:: )'•; '1)1 .2,1 1 N ‘ /
s:: 4 I 0 \ x'
i � � / e I. ', R / i'l'
t \z / { %
1 a i } •• \ I } / E f( .'"\s �� ! .
II
€ f ,
i
= {fit ^�if �r J
lr
1 ��1 i yi � s�a(i1!/ �7 t , �I (f`
" '" 12 ''''''" i \\A- n .:--'-fs'•',,, '.,,;-. --`,.`-- y -,-;));;-'7_.,-.7. ); \ • '1;.V "\"':-.3% \I
.-::-._. -...ci.. 1) \
'V,,,,;4, --# --- '''
-11
iikla N\
Fezir ,kp
- c• \i'(, ,,,\, '..:, ,,,.. --NN/- t 1
\ 0"\‘\\.\\. `'t...........-\\\...''— ''''''-1--!.:77 :1---.5/:,'"1,1.,.,,: i iffj --:'''
� ` \ . v �. i-------,_
- ti;):::,,,,:.--_—:„.„------:,„_,,,-- ,� ��11 (x � � ,.
-,-N,,
7:1 <3;.-\, i ' 11-
, A-4,
, ....„....„__„_____:__,
..,...„..s .,., 4,;,; .,
,.., ,,, ,
! .,"/K-
oc,. p.,,,;,,
7. 2,„
•
cm.
, ,,
_. .....
, •,‘, , _
,\.
\' ., ,
,\ ,
., , ,
, ,,
, . , ,,
,•,„,-.11'0if.:1 ,, ,i, , ,.--
,. ,
,.,*
.::,,,,:,
,..„...................,,,..„,, „ i: • i ;1 i,/'''''''-'"...-'"-..."+-i,'<•••,,:.:
yip ( ,. -.,:\,:z.,,,,,,,,f,\,„....,_____,
I /
/ (iii ' . 1).$:' -'-----'
\'' '' _1/ \' r/ $ ‘:\ \ I 7
'4, t \ - P- -* s...—"t4144"s---- ............ /t. 1/1( -- , --.'"---7-27-f
i er..
\ Lit
/10 w
/,4 '
' % \ \ i V 9 r
, IX\ , , 'ea:N-r .. ,,,,..r, :,' i,i; ( .! (,. -.';:-"' [
-,14/1 ,7-1 ',,,1::),,6) :
(A ''''' ' \ '•, \\:. -1/4J ce-' °).;:'(1 .il;'.. ill: '
A \ 7 :V. '-.... )1 1"4 ,., 'A \ \
1
.\\,, \. ..,,,,---' z>01°4' ?,:1't 1 3;1( 1-0,\,\\\,'-r
\ \ ,_ ® c: L j k` pt r '
1 `�. k. ,-/--,‘,„„7;,,--:..3;+,.... y
� - t
TO: File "
FROM: 1 1iChael P. Gaffron, Septic System Inspector
LATE: September 11, 1978
CU2JFCT: Coil Testin3 for Septic Systema
0306 Orono Oaks SeJdiviaion •
L' 21 tc:atioco- poL;cacd Grainfield sites in the Orono Oaks
. ± oic a ILll c<:iCcc accci/:.able percalatica rates for all lots -
t A: L.A.. 7 ,C. D2c a -
L:_-a:1 c 7ctc-i c/�:onld La r#1c:�atred C.Lo to olc.71y {
^.'S'}1() f -_-lRo. Coil i�cirI.T,:so t0 1:'"L:ciecto depth to/ c�07.1= ::tor
t;": 1 c;LL7 C1 Lota 10, 11 cal 12, cz:""1 ir.7n,,.,... 1 ri f-7"^ _
-.--1 -A----- 7',.27,-,1 ^ - 1 h of. - I'.ii::�:._",..l��il LOtt:rJ l
',) c; -2, E.:-X: t`2s:csa C:"3 Lo t.LL JL fr-.ccecccnilli cy to ecYuvc:it ionot 1
= i_ L. c1i eL.oaat Coat ruotLca o L4 cn cr�i trcv3, as re11L co
1...., _. (1)2 Lect;a Caleb .:n>r.c 10Cf..4f.�:; L073ty in m:2 C34:ti:o ?a
. ,_ ',/ ('"'` 1(.... lt". Uailo I do rat; cctaa er CID n valid reason
t -__,00 iota f,:co rp;, ".Tc:i tcattns, it is feasible "
'' c_ " cel t_..'i c;.—G9C'1 L,occ:1 cn (La pozoo2t_2Lf a C3t.c ct-3z.:A . {
1, Lia LI c,/OCC 0;773 r �c'..3 if =.: - O = pleo Ca too
L. I'-..� , I c;J2:2_(3 tcoc_ J L at CIa tcatic3
' i .7 i0C�goy. c^_':_1 l0Lc t:5 c at:0 L'!tre Cant t C of c ecc.s
• s.i2 ' i,. l LOT cccia toC.
`.:J_R! 1. , 8 .f.:.,.'_ C1:::::= Lr_) L=C: al CCT i io1d CcthC t: Li:: t2.r::, �.._.. CJ
( K:c,, - 'i- Cu��i C.2aitafic�.c1 oleo c .'2 coL:o' cal ttae 75' c�.:t:9.v °.1
fa ' :..
•
{
1
•
I
•
1 - ,
• f� LI
,I
1 4., , ra. i OP I )1. ... .
, I k76 ' (2)1
if
1 „�\ ( { f?
i 1 C2 .0 -/—-NI\ 't• \ kl * 1...,. i.:i i
- • r., '
1.
i_A, eNe f
, .,
]
--- ' \
-� y ' r
: - - - - — 1
j_'
"'"----:. . 1.1MN l'` I1..
,,!
j( rL,/�t�,7t :8,
;It.,,,i l,.,j"
iSt
ice . _----� / 1 �" i . i . ,
).,, D \\ j
, 1 fl
I yi,i „.:, ..
••••• t:t
i • .,•••• f7-01 C5
0
1 'C. cs \ L,,, 1 3 ii
/ 1
i i 1 fl '''t
I
C