HomeMy WebLinkAbout1994-10-31 Septic System Design Report1(300 rc� I—at
SYSTEM DESIGN
FOR BRUCE-BREN HOMES
OF LOT 8, BLOCK 1, .HADOWOOD FARM
ORONG, MINNESOTA
10-31-94
Information follows for a presure-mound system for a four bedroom '
house proposed on the above propertv. All construction and mater-
ials must be in accordance with MPCA Chapter 7080 and the City of
Orono codes.
All construction traffic must be kept off the primary and alter-
nate septic areas. These areas should be marked off prior to con-
structio:i.
A pumping tank will be needed to house the pump necessary for
pressure distribution to the system. The manifold and supply line
pipes must be constructed to drain back to the pumping tank. A
weather proof enclosure will be needed for the controls and swit-
ches for the pump and a warning light/sound system will be needed
to warn of pump failure.
If any other information is needed, -,please contact me.
Sincerely,
PERCOR, INC.
Mark S. Gronberg
MOUND DESIGN WORKSHE;r I'
(For Flows up to 1200 gpd)
FLOW
Estimated Co n gpd
or measured x 1.5 = gpd.
SEPTIC TANK LIQUID VOLUIN'ES
gallons f O�� F / U<� ; r- t Q, .
7.4
CIL
SOILS (refer to site evaluation)
.. Depth to restricting layer = /If inches
2. Depth of percolation tests = ! inches
3. Percolation rate S• 6 mpi
.. Land slope 1V
Esdrnued Setrate Flow in Gallons
N..ber
SoilTcxture
C.:_(•i
pd �rvw
S.por Td
Ly�__�+1r+
of
Type 1
Type 11
11'1
Be_:Ooml
750
1.125
1.00
2
300
225
1 500
3
450
300
3.000
4
600
375
1.52
5
750
450
2.00
6
900
525
2.40
7
1050
600
2.67
8
1200
675
5.00
r ROCK LAYER DIMENSIONS
:. Multiply flow rate by 0.83 to obtain required area of rock
layer: A x 0.83 =
KC C gpd x 0.83 sq. ft./gpd sq. ft.
:. Select width of rock layer (10 feet or less) _ �' ft.
Length of rock layer = area -�- width = Rock Bed
C 6 sq. ft. y i C ft. = sy ft. •i�i�i�� i�ir'"i� i�i�:�.
1 ~r iii iii i:i'•i~J�i i�i�i~i� i�. Width 510 ft.
.I././././.J•J•I. J.l.I. J. J.J././..
ROCK VOLUME i Length
Multiply rock area by rock depth to get cub- = feet of rock;
Sv 10 sq. ft. x / ft. = SDO cu. ft.
Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards;
S� ^ cu ft. + 27 cu. yd.
Multiply cubic yards by 1.4 to get weight of rock in tons;
L cu. yd. x 1.4 ton/cu. yd. = Z C tons.
.aDSORPTION WIDTH
Percolation rate in top 12 inches of soil is 3 mpi
Select allowable soil loading rate from table;
t"': f o. 6 O gpd/ft'
Calculate adsorption width ratio by dividing rock layer
loading rate of 1.20 gpd/ft2 by allowable soil loading rate,-
1.20
ate;1.20 gpd/fe+ . 60 gpd/ft2 = 2 • O
Multiply adsorption width ratio by rock layer width to get
required adsorption width;
2. U x /D ft= 2,9 ft
AbsorpdonKSdthSiunRLble
J' nulaSonR+ie
per rch
:nutn i
SoilTcxture
C.:_(•i
pd �rvw
S.por Td
Ly�__�+1r+
�+1'
po:r
D.-
Faster than 0.1
750
1.125
1.00
1.000
1.500
1.20
1 500
2250
F nc S.ind-
2.000
3.000
ovc9
Set fQ.0-6
(41.5
r ROCK LAYER DIMENSIONS
:. Multiply flow rate by 0.83 to obtain required area of rock
layer: A x 0.83 =
KC C gpd x 0.83 sq. ft./gpd sq. ft.
:. Select width of rock layer (10 feet or less) _ �' ft.
Length of rock layer = area -�- width = Rock Bed
C 6 sq. ft. y i C ft. = sy ft. •i�i�i�� i�ir'"i� i�i�:�.
1 ~r iii iii i:i'•i~J�i i�i�i~i� i�. Width 510 ft.
.I././././.J•J•I. J.l.I. J. J.J././..
ROCK VOLUME i Length
Multiply rock area by rock depth to get cub- = feet of rock;
Sv 10 sq. ft. x / ft. = SDO cu. ft.
Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards;
S� ^ cu ft. + 27 cu. yd.
Multiply cubic yards by 1.4 to get weight of rock in tons;
L cu. yd. x 1.4 ton/cu. yd. = Z C tons.
.aDSORPTION WIDTH
Percolation rate in top 12 inches of soil is 3 mpi
Select allowable soil loading rate from table;
t"': f o. 6 O gpd/ft'
Calculate adsorption width ratio by dividing rock layer
loading rate of 1.20 gpd/ft2 by allowable soil loading rate,-
1.20
ate;1.20 gpd/fe+ . 60 gpd/ft2 = 2 • O
Multiply adsorption width ratio by rock layer width to get
required adsorption width;
2. U x /D ft= 2,9 ft
AbsorpdonKSdthSiunRLble
J' nulaSonR+ie
per rch
:nutn i
SoilTcxture
C.:_(•i
pd �rvw
..�..,
Faster than 0.1
Coarse Sand
1.20
1.00
0.1 to 5
Sand
1.20
1.00
0.1 to 5
F nc S.ind-
0.60
2.00
6 to 15
3andy Loam
0.79
1.52
16 to 30
Loan
0.60
2.00
31 to 45
Silt Loam
050
2.40
46 to 60
Clay Loam
0.45
2.67
61 t0120
Clay
0.24
5.00
Slower than 120
Clay
---
I -
M")ti.i'6 W% - .- d nry or VO1Y R1V Ynd.
k
DOWNSLOPE DIKE WIDTH
If landslope is 3% or more, subtract rock layer width from
adsorption width to obtain minimum downslope dike toe
.70 ft - /,,;� ft= /O feet
Calculate Minimum mound size based on geometery:
a. Determine depth of clean sand fill at upslope edge of rock
layer: Separation /. S feet
b. Multiply rock layer width by landslope
to deterndne drop in elevation;
Slope Difference seperotlee
%+-100= O. `/ feet Wslope width
c. Add depth of clean sand for separation (2a) feet
at upslope edge, depth of rock layer 0 foot) to.depth of
cover 0 foot) to find the mound height at the upslope edge
of rock layer;
/. S ft + Ift + ift = S feet
d. Enter table with landslope and upslope dike ratio.
Select dike multiplier of 3. y S
e. Multiply dike multiplier by upslope mound height
to find upslope dike width: ?-Y5 x Z. s = /2. / feet
f. Add depth of clean sand for slope difference (2b) at
downslope edge, to the mound height at the upslope edge
of rock layer (20 to find the downslope height;
s ft + z). y ft = 3.? feet
g. Enter table with lar dslope and downslope dike ratio.
Select dike multiplier of t/. -16
h. Multiply dike multiplier by downslope mound height
to'get downslope dike width: 3 • •9 x �f.7S = /8. C feet
i. Compare the values of step G.1 and Step G.2h Select the
greater of the two values as the downslope dike width;
/�• 6 feet
<' vouoo
j. Total mound width is the sum of _
upslope dike (G.2e) width plus rock
layer width (D.2) plus a „p,;o;
downslope dike width(G.2i);
ft + /O ft+/j.6 ft= 1/G.%feet
k. Total mound length is the sum of
upslope dike width (G.2e) plus rock layer
length (D.3) plus upslope dike width (G.2e);
/f •
f t + SG ft+ /2-i ft= !yi feet
I toot Cover
fool
feet
Rota pea Wlath
feet
slope Olftorenco ---,tA-ot
Downslope Mtoth
lett
Total loh0th
oven ope
--- Ps
33
4.1
fa
41
7:t
f:1
4.1 11
41
7:1
o3
0
34
U
3.0
LO
7.0
1.0
CO 3.0
40
7.0
eD
1
1D0
417
316
W
7M
Its
1. AS 473
1. 6A
LU
741
2
1.11
41S
3S3
4Q
tat
LO
7.70 t51
f3s
L11
3.00
7
130
4S/
$31
7.32
4K
273
25F 153
5.03
3.79
SAS
1
741
4 73
3 :3
731
1.72
2Y
3.45 1.17
464
413
3GL
3
79
Up
L37
IS7
to"
231
233 /.W
437
5.11
f71
3
343
S.26
7.11
151
1207
2-33
3.".. 3-U
411
4%
$At
7
330
SS3
7Ae
tau
1773
1
2.12 7.70
&Z
L70
3.17
e
7.1f
SL
Lit
Its&
1f31
2.32
1.0 737
LOS
0.00
/3e
1
1.11
L2f
1D1
1743
1407
iii
1.001 3.15
3.10
3]0
GAS
111
L37
10.0
Ism
2331
231
2."731
3.73
412
1M
10
11
143
7.16
1151
ITAS
3043
216
US 3z
333
'At
3.41
SAS
3.00
136
449
12
1H
730
1750
7tA1
4325
121
2.70
':_ li •�MUM
Select number of perforated laterals 3- .
Select perforation spacing = 2 feet.
Since perforations should not be placed closer than 1 ft. to
the edge of the rock layer (see diagram), subtract 2 ft. from
the rock: layer length.
So
ko<kt,yer�,, Lti=2ft. = r/b' feet.'
Determine the number of spaces between perforations.
Divide the length above by perforation spacing and round
down to nearest whole number.
Length perf. spacing = `l,p ft. + ? ft. = 6• spaces
(3) (2)
Number of perforations is equal to one plus the number of
perforation spaces .
I° spaces + I= /7 perforations/lateral
Multiply perforations per lateral by number of late>;als to
get total number of perforations.
-? /7
utaj x pe,iw� = / perforations.
Determine required flow rate by multiplying
number of perforations by flow per perforation
C. �y
gpm.
If laterals are connected to header pipe as shown on upper
example, to select minimum required lateral diameter; enter
table with perforation spacing and number of perforations
per lateral. Select minimum diameter for
perforated lateral = i inches.
:f perforated lateral system is attached to manifold pipe near
the center, lower diagram, perforated lateral length and
number of perforations per lateral will be approximately one
half of that in step 8. Using these values, select minimum
diameter for perforated lateral = inches.
END PERFORATIOft OF A PERFORATED LATERAL
CJ.J
�i6 Toowl, p
1� •: Lor.. d Go4.111. Fowc (" I-
L.aany San" Irr.r.' ,• k�,cy.r .1 Iry er .Iro. ta..r.d
1 i P.r laralbn 0,111.1 1W111-1.1,
a in 1. CA r:. o. Toa
Y/.* Plw ut 12' to El;c
ti0101, F1.1d P -k3.,• . ,",:l of P UTtr
,. `�••Parforatlor�•Loco r.d of
Clan S4„4 Lar. Ooilom of Laftrol
Orlghol .So11 PToiler lr Sca'It.0
0.1we PTP
Sand Loyw
R.y.0 w.1 Pobr.. an fT.cA.,a.
N F+%b ti W r en uwu (dy enr
o�tira.
41e.d
y
1 r r•+
� � �
(k..l
ig
1;
1.0a
0.56
0.74
2.Ob
0.80
1.04
a. Use for single family hom s
b. Usc for all other applications
Maximum number of quarter inch perforations pe
lateral to guarnantee < 10% discharge variation
Perforation
Sr
ig
1;
n
2
2.5
14
18
28
3.0
13
17
26
3.3.
12
16
25
4.0
11
15
23
5.0
1 10
14
22
......OLD LOCATro AT rb V ••L mK 6:T •i�yi rtn S.^Sr
R
- F-17
A. Determine pump capacity:
Gravity Distribution
1. Minimum suggested is '-W gallons per hour (10 gpm) to stay ahead of
water use rate.
2. Maximum suggested for delivery to a drop box of a holre system is 2,7CO
gallons per hour (45 gpm) to prevent build-up of pressure in drop box.
Pressure Distibution
3. a. Select number of perforated laterals
b. Select perforation spacing = 3 feet.
C. Subtract 2 ft- from the rock layer length.
„�,ur-,'4', - 2 Et. _- �! �P feet
d. Determine the number of spaces between perforations.
Length perf.spacing .'/P ft.+ _? ft._ 6 spaces
e. IC spaces + 1 = /7 perforations/lateral
f. Multiply perforations per lateral by3 number of laterals to
t total number of perforations. x-�= 5/ perforations.
9�.7'Ti-rr =-L?- gpm.
SELECTED PUMP CAPACITY ? 3 -gpm
Determine head requirements:
Elevation difference between pump and point of di
., feet
If pumping to a pressure distribution system, five feet 'or pressure
required at manifold if gravity system, zero.
feet
Friction loss
a. Enter friction Ioss table with gpm and pipe diameter.
Read friction loss in feet per 100 feet from table.
F.L = . / ft./100 ft of pipe ro-
b. Determine total pipe length from pump to discharge
point. Add 25 percent to pipe length for fitting
loss, or use a fitting loss chart. Equivalent pipe
length -1.25 times pipe length =
SD x 1.25 = / 8 feet
c. Calculate total friction loss by multiplying
friction loss in ft/100 ft by equivalent pipe length.
Total friction loss= ! • x / .5'0 +100 = 3. 6 feet
Total head required is the sura of elevation difference,
spacial head requirements, and total friction loss.
Y
+ 7 + _l
(1) (2) (3c)
TOTAL HEAD _5 feet
C Pump selection
1. A pump must be selected to deliver at least
C = ' gpm (Step A) with at least /5 feet of total head (Step B).
C/D PCTFC:LTIC. OF . K,"FrnaTED LATCAAL
kr Tp.W •
rl G..I.IIY. FobN (r lo,•
' Lb1 �� I.trti � YaA M ,•tw. r.r-IYP .wwM
�M • . M CM I�.r 1 � Nor.l on l.11,
•r ��i ►Iw �Y lMu I=• t. I.{r
f-11 rl Pr[{ Lq.r
" Prlr Mbn 1.u1.� .1
RNuimd Pcrfontion Dinha Te
1n gallons per minute (gprn
Discharge
Head
UCCO
.Si .ap..r
% PM
1.0a
0.56
0.74
2.0b'
0.80
1.04
a. Use for single family homes
b. Use for all other applications
Pipe Length
Point of TTDischar
Elevation DifferencePtunp
F•18b
1.5 inch 2.0 inch 3.0 inch
91-M Fria m lou pv I N ft c(p;pc
10
0.69
0.20
12
0.96
0.28
14
1.28
0.38
16
1.63
0.48
18
2.03
0.60
20
2.47
0.73
0.11
25
3.73
1.11
0.16
30
5.23
1.55
0.23
35
7.90
2.05
0.30
40..11.07
2.64
0.39
45
14.73
3.23
0.48
50
3.99
0.58
55
4.76
0.70
60
5.60
0.82
Lofts or Soil Borinr.s
11-18
�s�--
r.ncation or Pro 10.ct !L ��% —_(�/ JCk l
�, ?
Borings made by �r r���-�--�--=='1 � �- �t� ,"' •--. i)atc
Classification System: AASM USDA -SCS _>—; Unified other —
Auzer used (check two): Fand or Power Flight —, or Bucket 4: other
Depth, Boring nu-mber. Depth, Boring nur.,her
in in 1
feet
Surface elevation feet Surface elevation
n t--� -- -- - n --� — --- - {
2 _.
GIS � r 9.Qou.,✓
C 4O/ok
4 — IIt
7 —
End of boring at .3 feet.
Standing hater table:
F3•esent at _?-O ft feet of depth,
hours after boring.
tIot present in boring hole
t Mottled soil:
Observed at _ �S feet of depth.
tlot present in boring. hole
Obsurvations and comments.
1 11 d«Ck (o/.rt
3 6',Ou r eR..G�,v
3 ---
4
L•nd o -F boring at .3 feet.
Standing crater table:
♦ J
Present at �— feet of depth,
hours after boring.
Not present in boring hole
Mottled soil:
Observed at /. !s feet of depth.
Not present in boring hole
Observations and comments:
Logs of Soil Borinr.s I3_18
/ - - — J� �j d
t �
Location or Project L/L� E �L/iJ _ _—� eT J <_i —
Borings made by I�.V"J�r/ii l� C'L� -- natey�2e. t�;`-----
Classification System: AASi:0 UgDA-SCS Unified other --
Auper used (check two): Hand Y, Cr Flight _, or Bucket : c.i.�r _
Depth, TBoring numher _ - Depth, Boring numher
Surface elevation � i Surface elevation
feec feet ---
n -- - - n — -- --�
End of boring at 3 feet.
Standing water table:
Present at 27i1 &ee-r of depth,
hours after 'oorinp.
Not present in boring hole
mottled soil:
Observed at feet of dr-Tlth.
i'.ot present in boring. hole —
Obs,rvations and cc-ments:
t
2
3
4
S
6
7
s —
id of boring at feet.
:anding water table:
:esenc at feet of depth,
hours after horinr..
it present in boring hole
zttled soil:
bserved at facet of depth.
of present in boring hole _
ibservations and comments:
I
PERCOLATION TEST DATA SHEET
Test hole location /:-& LLL 2 Te — L D / -
Bole number
Date test ho__ was prepared Z -/-2 p Depch
of
Bole bottom,-/�' _..'I
1L. .
Di__eter o:
Soil data _. leJV }tole.
^1•/�
Depth, inches
Soil
texture
G
Z.02 , , IT
o
1 1;
Method of scratching siacwall SG!(/1•%G
"
Depth of pea-sized gravel in bottom o� hole, _2
inchc::.
Date and hour of initial .later filling LV —,2!? —ZQ
=�
f
Depth of initial water filling, / 3 i^chcs
above
Bole botto:::.
`cthoc used to =aintain at 12 _: che5 of water
dcpt!t
in hole ::or ,.. __..
4 hours E /�� L L
Percolaticn test readings Nadu b
--
l./ '?D - /?j star;._^g at /2 ;faxi^:us
..ate: Depth at:o. _ ....
_
,�li
(date)
1/9,
during test, inches.
g—
Time
Ti=e Interval,
Minutes
�G
Measurement,
inches
Drop in water
level, inches
Percolation
rate,
minutes per
inch
Rema:-ks
L
Z.02 , , IT
o
1 1;
"
Percolation rate
winutes per inch.
f
Z
PERCOLATION 'rzs'r DAT.'. SHUT
Test hole location /f4j L �ER ) o& Hole number 2
Data test hole was prepared Y-2k-�,n , Depth of Bole bottom,
Dia::ace:• of hole, inches.
Soil data from t 1;olc:
Dept' :•:.�::es Soil texture
Xachod of scratching side:aall 54%1%iTc f'J L /z
Depth of pea-sized S,.avcl in botto:a o hole, 2 inches.
Date and 'hour of initial eater filli, .` -�— Z —`�Q 2 _._.A..l`1_
Depth of initial Water fill ng, ��� inches above hole botto:a.
Xethod used to maintain at least 12 inclics or cuter depth in hole or at
4 hours A G %i LL
?ercotiation test readings made by QA/✓
��Q sta_L'i.. at J ' 1 M.
� ^s 2 3^ sa r[axir.:urs waCer depth above iiolu v .cc.
(date) A
during test, d inches.
Time
Tice Interval, Measurement,
Minutes inches
Drop in waccr
level, inches
Percolation
rate,
minutes per
inch
I:e:,.iarks
/2 3Z 1
63
/ f
3 d �—
2 eel++ / ,17 JYM
114 I
4f
6 I
1_31
s. 92
f --
_ --
1-06
I
rcolation rate i minutes per inch.
K;
'.echod of ,scratching sidcaall
Depth of pea-sized &ravel in bottom o hole,
Date and hour of initial water filling
Depth of initial water filling,, inches above Bole bottom.
`fethod used to maintain at least 12 inches of water depth in hole for at 1�...._
4 hours #T I-+ L L'
Percolation test readings made by
Li -30 — 5 10 starting at 2 3
(dace) ' • D
�. during test, inches.
. Ila:cimum water depth abovQ ! _ _
Time
Time Interval, Measurement,
Minutes inches
QQ,2 2
PERCOUTION TEST DATA
SHEET
2
B -e k
I
Test hole location_
z' -z/ LLEnT
II
N �L-OT
—
hole
iL
3 S-
num.bcr
Dace test hole was
prepared 2Ir-
y�
y� ,
DCpI'�1
-
0= hOIC bOCtO:::,
Diameeer of hole,
4— inches.
Ii
Soil data fro= test
Depth, incises
Soil texture
'.echod of ,scratching sidcaall
Depth of pea-sized &ravel in bottom o hole,
Date and hour of initial water filling
Depth of initial water filling,, inches above Bole bottom.
`fethod used to maintain at least 12 inches of water depth in hole for at 1�...._
4 hours #T I-+ L L'
Percolation test readings made by
Li -30 — 5 10 starting at 2 3
(dace) ' • D
�. during test, inches.
. Ila:cimum water depth abovQ ! _ _
Time
Time Interval, Measurement,
Minutes inches
QQ,2 2
Drop in water
level, inches
Percolation
race, I:e;^arks
minutes per
inch
2
Oh i
i
iL
3 S-
1.36
2. O to
2.07
t
3 JN +
Ii
Percolation rate m PSO minutes per inch.
L
.• .
CtiE�iC
Mcthod of scratching side:rall SG e%:
Depch of pea-sized gravel in bottom ot. Bole, 2 inchus.
Date and hour of initial water filling 2!?
Depth of initial water fill=ng,3 inches above hole bULLo:::. • /
Xct:^od used to maintain at lease 12 inches o_! waccr depth in hole for at lu::::L
4 hours ALF -/ L L
?ercolation test readings made by
'` 30— Q StarLin r z
`'� — S at a. Ill.
2 , � 3 �1 i•ta:<ir.:ur� water c.epth auovc iiv_u b•. �t:
(date) ' `-
durin3 test, S inches.
Time
Time
Interval,
Minutes
Measurement, Drop in water
inches level, inches
9
Percolation
rate,
minutes per
inch
Rema:ks;
�� LLC
/ Ui Z S I
PERCOLATION TEST DATA SHEET
'N
Test hole
location f/J L /- 'C- j/J
---��V/'�
elle r.ut^uer
Date test
hulc was prepared !V-% 9-
Depch
of hole bottom.,
Diameter
of hole, _� irches.
-t-
Soil data
froe test hole:
Depth, itches
Soil texture
----
CtiE�iC
Mcthod of scratching side:rall SG e%:
Depch of pea-sized gravel in bottom ot. Bole, 2 inchus.
Date and hour of initial water filling 2!?
Depth of initial water fill=ng,3 inches above hole bULLo:::. • /
Xct:^od used to maintain at lease 12 inches o_! waccr depth in hole for at lu::::L
4 hours ALF -/ L L
?ercolation test readings made by
'` 30— Q StarLin r z
`'� — S at a. Ill.
2 , � 3 �1 i•ta:<ir.:ur� water c.epth auovc iiv_u b•. �t:
(date) ' `-
durin3 test, S inches.
Time
Time
Interval,
Minutes
Measurement, Drop in water
inches level, inches
9
Percolation
rate,
minutes per
inch
Rema:ks;
�� LLC
/ Ui Z S I
/
'N
—
Z
-t-
2.31
—
2
2 1
97
i
/O r
Percolation rate �� - minutes per inch. _
PERCOLATIO`1 'rEST DATA SEtBrT
'j'' BLS '
Test ho: -e vocation 11 �G��D�/�� ZO/ '� Hole number____
Data test hole was prepared L1/^2�—%d Dept!t of hole bottom,
Dia=eter of hole, is Chcs.
Soil data :row test hole:
Depth, inches Soil texture
".c:hod of scra:--hing sidc:rali
Depth of pea -steed gravel ttort o_ hole, _ i11C1'.Cs.
Dace and hour of initial iillin
De?ch of initial water L'il:_rnE _ _ i.chas above hole bottot::.
`:ct'.^.od used to =aintain at least 12 i::ches of vacer depth in hole for at
4 hours OfEF, G L
-Y o Oib
Percolation test readings made b
:1 L . t'1 . starting at Maximut:t Nater depth above
(date)
during test, d inches.
Titre
Ti --e Interval, Measure: ant,
Minutes inch --a
Drop in water
level, inches
Percolation
rate,
minutes per
inch
Ram'I Ram'tes
V YO
AA D 3 e
__
1.07
% i31g
7 F
1.39 1 3AL�---
08
?.09 I.---
I
j
---
Percolation rate , 2 h
a,inutoI per inc.
C.
PERCOLATION TEST DATA SHEET
1 "�� OAK �
Test hole location Elj LLLeIe / �J�/— ��� !!ole iiu:::ber�__ _
Data test hole was prepared Depth of Bole bottoia,L_-
Dia=ecer of hole, incites.
Soil data frc= test hole:
Depth, inches Soil toxture
Q - /-C 1 9,40 4.l 4 0AM --
".a_hod 0-4�, scratching sidc:aall
Depth of pca-sized gravel in boCt•O:n of hole, _z _ inchus.
Date and hour of initial water filling —29'9 _-�,..•P/"%
Depth of initial water filling, /3 inches above hole bottom.
Hathod used to eaintain at lease 12 inches of waccr depth in hole for at lu.:
4 hours #4eda F/ L L L
Percolation test readings made by DOW C -,P GA4,CR 4._ 0:1
a '1. -
jQ starting at /2, 3 �1 Etaxirwm uatcr depth above
(dace)
during test, 7 �JP inchas .
Time
2
Time
Interval,
Minutes
Measurement,
inches
Percolation
Drop in water rate,
level, inclies minures per
inch
-
2
--
-
.09
t,77
Ik
_..._.
D 3
_
I-/ Yz
-
3
t/ -7. �S
_
- O'D
-------
'7 minutes per inch.
Percolation rate