HomeMy WebLinkAbout20020796 SOLAR and GENERAL Consulting Engineering
P.O. Box 761 Limon, Colorado 80828 (719) 775-9314
JUNE 5, 2000
SUBSURFACE INVESTIGATION AND SOILS REPORT
LOCATION S 1/2, S 1/2, SW 1/4 OF SEC. 31 , T5N, R64W, WELD
COUNTY, COLORADO.
for VIRTUS BANOWETZ ••IS) R C%�
Box 115 °cti, kf
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LIMON, COLO. 80828 •
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0414
G EXHIBIT
n2002-0796
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This study was done to determine the types of acceptable
foundations, ground water conditions, types and
characteristics of the soils at the fore mentioned site .
The site is located within a rural area in Weld County,
Colorado. Vegetation consists of native and domestic plants
and grasses. The terrain slopes, generally, to the Northeast
at about 2% .
Test Hole "A" was dug within the perimeter of the proposed
foundation for the house. Test Hole "B" is in the area of the
proposed leach field.
Laboratory tests indicate the soils at the 9 ' depth in hole
"A" are A-4( 5 ) AASHTO ML ASTM which equate to UBC Class 5
soils . The allowable design loading is 1,000 PSF . Per UBC
specifications the allowable loading may be increased by 20%
per foot depth to a maximum of three times the initial design
loading. These soils are LOW swelling. No ground water was
observed in the test hole.
Other mechanical properties of these soils are as follows :
Passing sieves : #10 - 100% , #40 - 99%, #100 - 95%, #200 - 92% .
The liquid limit is 29, the plastic limit is 23 and the
plastic index is 6.
CONCLUSIONS AND RECOMMENDATIONS
It is my understanding that the new structure will be a frame
house supported over a walkout basement. I would recommend
the structure be supported on a reinforced concrete
foundation. I would further recommend the use of two
reinforcing bars at both the top and bottom of the foundation
wall to lessen damage should the soils settle or swell .
1 . Concrete
All concrete shall have a minimum compressive strength of
3,000PSI in 28 days. "Green" concrete shall be protected from
freezing when the ambient air temperature is below 35 degrees
F . .
One may choose to use "Fiber Mesh" or reinforcing bars in the
flat work concrete to control cracking. Slabs should be
scored at ten foot intervals in both directions to further
control any cracks that may develop.
2. Reinforcing Steel
All reinforcing steel shall be grade 60. The bars, where
possible, shall have 3" of clearance from any concrete
surface. Unless otherwise approved, bars shall be placed as
per plan.
#4 bars shall be placed at 45 degrees to the corners of all
blockouts . Horizontal bars are to be continuous around
windows, corners and step-downs unless otherwise detailed.
3 . Soils Compaction
All soils beneath slabs or foundations shall be compacted to
95% relative compaction per ASTM D 1557-91 .
Back filling shall not start until floor joists are in place
for the first floor. In case the house or building is a
modular or manufactured building the building must be set on
the foundation or have bracing in place that will not allow
the wall to deflect during the back filling operation.
Fill around the foundation wall shall be compacted to 90%
relative compaction per the above specs after the concrete has
obtained a compressive strength of 2,000PSI . In no case shall
the backfill be placed less than 72 hours after the concrete
placement .
4 . Drainage Control
Grading should be such that surface water is drained away from
the foundation. Minimum grade would be 1 ' vertical drop per
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10 ' horizontal away from the foundation.
Top soil is to be removed and soils beneath the structure
should be compacted before the construction is started.
PERCOLATION RESULTS AND RECOMMENDATIONS
Test Hole "B" , leach field.
Laboratory tests indicate that these soils are A-7-6( 18)
AASHTO CL ASTM at the 9 ' depth. The soils are LOW swelling.
The slope is 2% to the Northeast in the area of the leach
field.
Other mechanical properties of these soils are as follow:
Passing sieves - #10 - 100%, #40 - 93%, #100 - 86% and the
#200 - 82% . The liquid limit is 45 , the plastic limit is 24
and the plastic index is 21 .
Soils above the 4 ' depth did percolate very well . Soils below
this depth would have a slower percolation rate. The soils are
fine grained and the leach field should be over sized in case
there is some consolidation.
Percolation rate .
Hole #1 8. 1
Hole #2 6 . 7
Hole #3 7 . 3
Percolation Average 7 . 4
If this house is to have three bedrooms I would recommend the
following: Use a 1,000Gal . effective liquid limit septic tank
and a 1 ,000 SF leach field. Add 250Gal. to the septic tank
and 200 SF to the leach field for each additional bedroom
over three.
If there are questions please contact me .
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TEST HOLE LOCATIONS
S 1/2, S 1/2, SW 1/4, SEC. 31 , T5N, R64W, WELD COUNTY , COLORADO.
LEACH
HELD
684'
2 3
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W
644' HOUSE 1 ED
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WCR 50
WW ENTERPRISES PERCOLATION TEST RESULT FORM
SOLAR and GENERAL CLIENT: v;,f 2.; 9aanwett
Consulting Engineering LOCATION:nre of ail 49 a so /e:.t4/ w,l,(c,/y
DATE PRESOAKED: ) .nx ov DATE TESTED 2 "-221:(00c-
TAN a�
P.O. Box 761 Limon, Colorado 80828 TECHNICIAN: ..,Sr r„,,, , MILEGE: 112
HOLE LENGTH OF WATER DEPTH WATER DEPTH• DROP IN PERCOLATION •
HOLE 6 START OF 6 END OF RATE FINAL
DEPTH INTERVALS WATER LEVEL
NO. INTERVAL INTERVAL INTERVAL
(INCH) (MIN.) (INCH) (INCH) (INCH) (MIN./INCH)
36 34 34' 31'/z 4 /
3v 3E _23-1/f 14 Vic 4- `yir
3.. 4E .2 9 s/ Li 4 'A s ;
Jo 29 /g__ 34 '4
30 * 2 y '/2 3 3 '/4 4 '/
3o it 30 Z3'Mt 3 '> /t .
33u 4( 30 33 '/ 7 ' 4 /
3o k 30'/4 )3 "Ja 3 'lit •
36 3v 30 3S "AI S %r
3.I f aIIi 3S�/� 6 '%it
J0 * So '/•- 3{ %¢ S `/s
2 3..' if .29 ' //1 1q'r�i6 s`
30 L9 �� 3 2//�� 3" '
30 * 30 Vii ,j4 "lic 4 54
30 a 30 '/8 31 '!g 4 Vt ..7
2° 4e 3o Vs 34x/8 4Yl rl
36 30 3 ., 34 '/?_ 4 %2
3 t .29 '/ 33 '-1/it ., 4J//r
3 3o ie Z9'h' "c 33 '/4 4 '/i '
3.• k ) V 34 A 4 '/y '
30 at' 38 34 '/9 4 '/e •
7.3
PERCOLATION AVERAGE = 7 IF •
W4Jes . A//J
C c c .p 0 v — N
C C .- C .4. co O O O O6
M N r •- M Ti
100 i
eo } 1 1 I ' I -
70 1 -( _
I • 1 1 .
0 60 -
z
50 I 1 .1
* 40 ' 1 I . I
Hi
20 1 1 - 1
10 } - 1 - I
0 I I I
100.00 50.0 10.0 5.0 1.0 0.5 0.1 0.05 0.01 0.005
+I G�RAIN-SIZE DISTRIBUTION CURVE
Name Nit l�trr t1\9t>3 Hole H • NA �y_
Plotted by 1 Date IQ - \- t
C
O O
C .e et G 0O N
cI N ri A 7 Za Z Zci 2 Z
100 I6.7.------ ---. .
eo I I I .
1 ! .
Z60 I _ .
2. 5o I I I .
* 40 I ' I .
30 I I
I
so r I i - - -
( 10 I- I I . . I.
0 I I .I- - I
100.00 50.0 10.0 5.0 1.0 0.5 0.1 0.05 0.01 0.005
GRAIN-SIZE DISTRIBUTION CURVE
NameNCALu C\ n-� Hole '9D- \FCx &\(-\Plotted by k 0 Date 10- 1-1
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SOILS PROFILES
DATE 6/5/00
LOCATION S 1/2 , S 1/2, SW 1/4, SEC. 31 , T5N, R64W, WELD COUNTY,
COLORADO.
TEST # A * B
DEPTH
0 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
BROWN SILTY CLAY BROWN SILTY CLAY (MOIST )
(MOIST)
1 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
2
TAN SANDY SILTY CLAY TAN SANDY SILTY CLAY
(MOIST) (MOIST)
3
4 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
FINE WHITE SILT
5 XXXXXXXXXXXXXXXXXXXXXXXX
DARK BROWN CLAY/SHALE DARK BROWN CLAY/SHALE
(MOIST) (MOIST)
6 A-7-6( 18) AASHTO CL ASTM
PASSING SIEVES
#10 - 100%
#40 - 93%
#100 - 86%
7 XXXXXXXXXXXXXXXXXXXXXXX #200 - 82%
TAN SILTY CLAY (MOIST)
A-4( 5 ) AASHTO ML ASTM LL 45, PL 24 , PI 21
PASSING SIEVES
#10 - 100% LOW SWELLING SOILS
8 #40 - 99%
#100 - 95%
#200 - 92%
LL 29, PL 23, PI 6 .
LOW SWELLING SOILS
9 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
10 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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