HomeMy WebLinkAboutIRVINE S-3640C.o.s N
4040 "B" STREET,
ANCHORAGE, ALASKA 99503
PHONE: 907-279.2581
Denali Drilling, Inc.
4040 B Street
Anchorage, Alaska 99503
Attention:
Mr. Hal Ingalls
Project:
April 15, 1975
Subject:
SW 1/4 SE 1/4 NE 1/4 ~q 1/4 of Section 24
T12N Range 3W SM Alaska
Subsurface Soils Study above property
Gentlemen:
Transmitted herein are the results of test borings placed in
the project property at the specified locations and depths.
The data is organized in this report as follows:
Test Hole Location Sketch Figure 1
Test Hole Logs Sheet 1 to 2
Standard Explanatory Data Sheet 6 to 8
The test holes were drilled by Denali Drilling, Inc., super-
vision, testing and report by Alaska Testlab.
The test holes were placed by means of a Nodwell mounted
Mobile B-50 drill fitted with solid flight auger. Grab
.samples were taken from the cuttings and from the auger bit
as needed.
The test holes were placed on the 12th of April 1975, super-
vised, logged, and sampled by Mr. Bruce D. Kenworthy, techni-
cian of our staff.
The soils found in this study are predominantly borderline
with regard to frost susceptibility. The soils at depth
were silt-sand-gravel mixtures GP/GM, possibly unsorted
glacial till overlain by windblown sand-silt mixtures.
No free water was observed in either test hole.
Denali Drillings~nc.
April 15, 1975
Page 2
The Greater Anchorage Area Borough has established the
amount of seepage area per bedroom required for a particular
seepage pit based on the unified classification of the soil.
We understand this criteria to be as follows:
Unified Soils Classification
GW-GP
GM
SW
SP
SM
ML
CL-CH
Seepage Area Required
.85 ft2/bedroom
225 ft2/bedroom
125 ft2/bedroom
150 ft~/bedroom
250 ft2/bedroom
27'5 ft2/bedroom
350 ft2/bedroom
Soils with a seepage area value of greater than 250 ft2/bedroom
are generally considered not sufficiently permeable to
accept effluent. Additionally, the bottom of any seepage
pit is required to be 4 feet above the free water level.
The unified soils classification of each soil type en-
countered at the time of exploration are contained on the
test hole logs, should proportioning a specific seepage pit
.in the area defined by a specific test hole. be required.
If there should be any questions on the above please contact
our office.
Very truly yours,
KWB: rb
Enclosures
ALASKA TESTLAB
~~o~ ~pervisor
//
Test Hole #1
WO #17285
Depth in Feet
From To
0.0' - 2o0'
2.0' - 6.0'
6.0' - 16.0'
Elevation: Existing Ground
Soil Description
F-4, Sandy Siltw ML, reddish brown, wet, some
fine organic material, soft.
F-l, Silty Sandy Gravel, .GP/G~, reddish brown,
damp~ dense.
NFS/NF-1, Silty Sandy Gravel, QP/GM, brownish
gray~ damp, dense, sharp to subrounded.
Bottom of Test Hole:
Frost Line:
Free Water Level:
16.0'
1.0'
None
Sample Type
Number pepth Blows/6" M% pf Sample
1 5.0' .... Grab
2 10.0' .... Grab
3 15o0' .... Grab
Dry
Strength Group Other
Test Hole #2
WO #17285
Depth in Feet
From To
0.0' - 4.5'
4.5' - 16-0~
Elevation: Existing Ground
Soil Description
F-4~ Sandy Silt~ ML, tan, damp to wet, slight
amount of organic material to 2.5', soft.
NFS/F-l, Silty ~andy Gravel, GP/GM, occasional
cobble to 4", damp to wet, medium to low den-
sity, sharp to subrounded gravels, cobbles en-
countered from 11' to 15'
Bottom of Test Hole:
Frost Line:
Free Water Level:
Remarks:
16.0'
0.5'
None
3" to 4" vegetation cover.
Sample
Number Depth
I 5.0'
2 10.0'
3 15.0'
Type Dry
Blows/6" M% of Sample Strength
.... Grab --
.... Grab --
.... Grab
Group Other
DEQ Comments
April 21, 1975
21. S-$~50 Nettleton Acres Subdivision
This area,. 'is nol sen/cd by public s,:..~.~ water.
soils and water ~vailabili~ information
- ~tn the final plat.
The' lot size on the preliminary plat is adequate if .q]e soils and
water data prove satisfactory.
22. S-$642 ADI Lakeview Subdivision
23.
-We have received no sofia or water availability data. ~ ~- '
z~l~ecl upon da~a
available in this area and the s!dpe of this property we would
recommend only split~in~- d,~s acreage in half,
!Ye must receive soils data and water d .... prior to our final
recommendation on this case.
S-3636 Lots 9A .'.md tOA, Block 5, ~-
~,dter O. Pippe! Subdivision
This 'oroperty is not served by public sewer and
~, .~,~r. 9A
will have ~o be ......
. ~ v,;a by public sewer or water
before a home
could be buil~ on ~he
24. S-3640 Lots I and 2, Irvine Subdivision
TI'tis area is ~ * served by public sewer aha water.
h~ soils tests, lot slope., ~
,,n~, size and water availabi!iiy
indicate the two = ~ ~
pzopo~ea lots .... adequate for' single tam~ly
residential de'veiopments.
Ro!f Strickland, R.S.
Chief Sanitarian
RS/lw
cc: Dennis Gardner