HomeMy WebLinkAboutBIRCH TREE ESTATES Block 2 Lots 11 & 13 Soil TestIII
4040."B" STREET,
ANCHORAGE, ALASKA '99503
PHONE: 907-27%2581
May 25, 1976
W.O. 17683
Grip 3037
Yukon Realty
4619 Spenard R~.
Anchorage, AK
99503
Subject:
Subsurface Investigation - Lots 11~12,13, Blk 2
Birch Tree Estates
Gentleme~ :
Transmitted herein in accordance with your instructions are
the results of the above referenced investigation as performed
by us on May 19 and 20, 1976. The scope of this project is
'investigation for suitability of an on-site sewerage system.
Included in this transmittal are:
Vicinity Map
T~st Hole Location Sketch
Test Hole Logs
Explanatory Information
.Figure 1
Figure 2
Table A
Sheets 1-3
The exploration was conducted using a Nodwell mounted ~obJle
Drill mode]. B-50 drill rig with a continuous flight solid
stem auger. The rig is owned and operated by Denali Drilling
~ Inc. D~illing was supervised, the test holes logged and
percolation test performed by Mr. Terry Barber, geologist
with Alaska Testlab.
The test holes were placed at the approximate location shown
on Figure 2. The logs of these test holes are included as
Table A of this report. In interpreting the logs it would
be helpful to utilize the explanatory information contained
in sheets 1 to 3 of this report.
When drilling was completed, a 3/4" slotted PVC pipe was
inserted in each hole to aid in determining the free water
level.. For the percolation test, the test hole was filled
with water and left overnight to saturate. The next day,
the hole was refilled with water and the drop in the water
level carefully monitored over the next 60 minutes.
This procedure is not a standardized percolation test,
however, wh understand that the Anchorage Department of
Environmental Quality .prefers tests performed in this manner
to evaluate a site for a proposed on-site sewerage system.
:1- ,.?/ I'!
Z
LOt 13, Blk 2
Test Hole No. 1
Depth in Feet
From To
0.0 1 .5
I .5 5.0
5.0 11 .0
11 .0 12.5
12.5 16.0
TABLE A
Date: 9/19/76
Logged: T.B.
WO~ 17683
SOIL DESCRIPTION
Brown Topsoil, roots, plants, etc.
NFS, brown Sandy Gravel (GP/GM), with trace
silt, damp, med['u~ to high density
NFS/F-l, brown, slightly Silty Sandy Gravel
(GM), damp, becoming more'dense ~ith depth
F-4, brown Sandy Silt (ML), wet, soft to stiff
F-4, blue-grey, Gravelly S__andy Silt (ML), wet,
stiff .
Bottom of Test Hole:
Frost Line:
Free Water Level:
SA.
NO. Depth
1 2.5
2 5.0
3 10.0
4 16.0
16.0 ft.
None observed
None observed
Type of Dry
M% Sample Strength unified
-- G ' --- GP/GM
-- G --- GP/GM
N O R E C O V E R Y ---
-- G --- ML
Remarks:
1)
2)
3)
4)".
Type of Sample: G=Grab
General Information', See Sheet 1
Frost & Textural Classification, see Sheet 2
unified Classification, see Sheet 3.
Lot 13, Blk 2
Test Hole No. 1
Depth in Feet
From To
0.0 1 .5
I .5 5'.0
5.0 11 .0
11 .0 12.5
12.5 16.0
TABLE A
Date: 9/19/76
Logged: T.B.
WO~ 17683
SOIL DESCRIPTION
Brown Topsoil, roots, plants, etc.
NFS, brown Sandy'Gravel (GP/GM), with trace
silt, damp, medium to '~igh density
NFS/F-l, brow~, slightly Silty Sand~ Gravel
(GM), damp, becoming more dense with depth
F-4, brown Sandy. Silt (ML), wet, soft to stiff
F-4, blue-grey, Gravelly Sandy Sil_~t (ML), wet,
stiff
Bottom of Test Hole:
Frost Line:
Free water Level:
NO. Depth_
1 2.5
2 5.0
3 10.0
4 16.0
M%
16.0 ft.
None observed
None observed
Type of Dry
Sample Strength
RECOVERY
unified
GP/GM
GP/GM
Remarks:
1)
2)
3)
4)"
Type of Sample: G=Grab
General Information, See Sheet 1
Frost & Textural Classification, see Sheet 2
unified Classification, see Sheet 3.
Lot 11, Blk 2
Test Hole No. 3
Depth in Feet
From To
0.0 3.5
3.5 16'.0
TABLE A
Date: 5/19/76
Logged: T.B.
WO#17683
SOIL DESCRIPTION
F-2, brown Silt~ Sand, (SM), damp
F-l, brown Silty Sandy Gravel, (GM), damp, dense.
Bottom of Test Hole:
Frost Line:
Free Water Level:
SA.
NO. Depth
M%
I 2.5
2 5.0
3 10.0
4 16.0
16.0 ft.
None observed ''
None observed
Type of Dry
Sample Strength
G --
G --
NO RECOVERY
NO RECOVERY
Unified
SM
GM
Remarks:
1)
3)
4)
'~pe of Sample, G=Grab
General Information, see Sheet 1
Frost & Textural Classificatio, see Sheet 2
Unified Classification, see Sheet 3.
Lot 11, Blk 2
°Test Hole No. 3
Depth in Feet
'From To
0.0 3.5
3.5 16.0
TABLE A
Date: 5/19/76
Logged: T.B.
W0#17683
SOIL DESCRIPTION
F-2, brown Silky. Sand, (SM), damp
F-l, brown Silty Sandy Gravel, (GM), damp, dense.
Bottom of Test Hole:
Frost Line:
Free Water Level:
SA.
NO. .Depth
1 2.5
2 5.0
3 10.0
4 16.0
16.0 ft.
None observed
None observed
Type of Dry
M% ~ample Strength
G
G
N O
N O
R E'C O V E R Y
RECOVERY
Unified
sM
Remarks:
1)
3)
4)
'Q~pe of Sample, G=Grab
General Information, see Sheet 1
Frost & Textural Classificatio, see'Sheet 2
Unified Classification, see Sheet 3.
Yukon Realty
May 25, 1976
Page 2
Using the above test, the observed minimum percolation rates
were as follows:
Lot 11
Lot 12
Lot 1.3
min./inch
min./inch
min./inch
No water table was observed during drilling, but it should
be noted that the free water level normally fluctuates
seasonally and with precipitation.
We hope this report meets your present needs. If we can be
of further service, please feel free to contact us.
Yours very truly,
· Approved':
Melvin R. Nichols, CE,
Laboratory Supervisor
ALASKA TESTLAB
.
R.. Mark Hansen
RMH:mm
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