HomeMy WebLinkAboutBASS #2 S-4039 Expired Plat
ge
DATE:
TO:
FROM'
~SUBJECT:
icipality of Ancho,
MEMORANDUM
May 14, 1976
Planning Department
Department of Health and Environmental Protection
S-4039 BASS UNIT #2
true
Environmental Sanitation will approve this application on the proposal of
DOWL Engineers of May 13, 1976, copy attached, and with these conditions.
Full engineering design of the package treatment plant end additional land
~ill to assure no sewage influence in surface waters on lots 1 and 3, due
to the static water reading. We may bring this to the attention of the
engineers ~q~.at these soils tests were made in December which does not give
~icture of the average water table.
ital Specialist
\
ANCHORAGE, ALASKA 99503
PHONE (907) 278-1551
~.i~ay 1.3, 1976
W.O..Jr 8819
~unicipality of Anchorage
Department of Environmental Quality
2510 E. Tudor Road
Anchorage, Alaska 99503
Attention:
Rolf Strickland
Subject:
David Bass' Subdivision
On-Site Water and Sewage Facilities
Gentlemen:
This letter is to inform you of the substance of our discussion
with the owner on February 13, 1976. At this time the
owner's attorney, Mr. A. Lee Peterson, reviewed the soils
report and our recommendations and agreed that each lot should
have a separate well and package treatment plants should be
constructed on Lots · and 3 as shown in the sketch labeled
Proposal A. To the best of our knowledge the owner intends
to construct these facilities during the coming construction
season.
We propose to design the package treatment plants based on
the soils information contained in the report dated December 30,
1975.o (A copy was previously sent to your office.) The
size and location of these facilities will be based on
current ~lunicipality standards and requirements. It is anticipated
that a gravel fill will be required to provide a suitable drain
field on Lot 1.
We apologize for the delay in transmitting this information
to you. We hope that you can proceed with approval of the
subdivision as presented. Please advise if any additional
information is needed.
Very truly yours,
WPH:pks
Attachments
cc: Mr. A. Lee Peterson
720 "M" Street
Anchorage, Alaska 99501
DICKINSON-OSWALD-%fALCH-LEE,
William P. Hamm, D.E.
J
PHONE
~unicipality of Anchorage
Department of Environmental Quality
2510 E. Tudor Road
Anchorage, Alaska 99503
1.3, 1976
W.O.!~8819
Attention:
Rolf Strickland
Subject:
David Bass' Subdivision
On-Site Water and Sewage Facilities
Gentlemen:
This letter is to inform you of the substance of our discussion
wi'th the owner on February 13, 1976. At this time the
owner's attorney, Mr. A. Lee Peterson, reviewed the soils
report and our recommendations and agreed that each lot should
have a separate well and package treatment plants should be
constructed on Lots z and 3 as shown in the sketch labeled
Proposal A. To the best of our knowledge the owner intends
-to construct these facilities during the coming construction
season.
We propose to design the package treatment plants based on
the soils information contained in the report dated December 30,
1975. (A copy was previously sent to your office.) The
size and location of-these facilities will be based on
current ~.!unicipality standards and requirements. It is anticipated
that a gravel fill will be required to provide a suitable drain
field on Lot 1.
We apologize for the delay in transmitting this information
to you. We hope that you can proceed with approval of the
subdivision as presented. Please advise if any additional
information is needed.
Very truly yours,
WPH:pks
Attachments
cc: Mr. A. Lee Peterson
720 'M" Street
Anchorage, Alaska 99501
DICKINSON-OSWALD-%~ALCH-LEE,
William P. Hamm, 'P.E.
'1
TO
DICKINSON-OSWALD-W/t* "H-LEE
ENGINEERS
4040 "B" Street
ANCHORAGE, ALASKA 99503
Phone (907) 278-1551
M/.;~ lc./
PEeP 7-- o~'
Bo
ATTENTION
RE:
GENTLEMEN:
WE ARE SENDING YOU
[] Shop drawings
,~ Copy of letter
,~Attached [] Under cover via
separate
[] Prints [] Plans [] Samples
[] Change order []
the following items:
[] Specifications
COPIES DATE NO. DESCRIPTION
THESE ARE TRANSMITTED as checked below:
[] For approval
[] For your use
[] As requested
yFor review and comment
[] FOR BIDS DUE
[] Approved as submitted
[] Approved as noted
[] Returned for cOrrections
19
[] Resubmit
[] Submit
[] Return
copies for approval
copies for distribution
corrected prints
__ [] PRINTS RETURNED AFTER LOAN TO US
REMARKS
~ ~ /L~ -57". SIGNED:
F01m240-T--Ilewi11~aedeusiressS~v]ce, h~.,TemlsaxI, Mass. If enclosures are no/ as noted, kindly notify us at once.
4040 ;'B" STREET,
ANCHORAGE, ALASKA 99503
PHONE: 907-279-2581
December 30, 1975
W.O. 8819
Grid 2132
Mr. David Bass
c/o ])OWL Engineers
4040 "B" Street
Anchorage, AK 99503
.Subject: Subsurface Investigation for Suitabil.it~ of
On-Site Sewerage, Bass Subdivision
Dear Mr. Bass:
Transmitted here~'~ are the results of %he above referenced
investigation as performed by us on'D~cember 22 to 24, 1975.
The project is located.on 7~th Avenue:near the Lake Otis
Parkway, Anchorage, Alaska, and comprises Lot. 53 of Section
Township 12 North, Seward ~eridian, A.laska.
Included in this transmittal are:
vicinity Map
Test Hole Locahion'Sketch
Test Hole Logs
Explanatory Information
Figure 1
Figure 2
Table A
Sheets 1-3
The e×ploration was conducted with a truck mounted "Mobile Drill",
model B-50 d]?i].l .]-~i9 wi. th a continuous flight,, so]id stem
auger. The rig is' owned and ope.rated by Denali Dri]_ling
Inc. The ~]rilling was supervised, the test ho'les logged,
and the pcrcolotion tests run by Mr. Wallace Oliver, staff
technician oY Alaska Testlab.
The test ho'].es were 'pi. aced at the approximate ].ocat~qn
on Figure 2. As samples ~]?om the hole were recovered, they
were sea]ed in plastic bags to protec'h the sample and
Mr. David Bass
December 30, 1975
Page Two
its natural moisture prior to being transported to the
laboratory. Once in the laboratory, the moisture content
and dry strength of each sample was determined. The log of
the test holes is included as Table A of the report. In
interpretting the logs it would be helpful to utilize the
explanatory information contained in the back of this report.
When drilling .was completed, a 3/4" slotted P.V.C. Pipe was
inserted in each test hole to provide ~ conduit for measuring
the water level. Test hole #1 was then filled with water
and left overnight to saturate. On returning the next day
the hole was refilled with water and the drop in the water
level carefully monitored over the next 60 minutes. The
above procedure is not a standardized percolation test,
however, we understand the Anchorage Department of Environ-
mental Quality prefers tests performed in.this manner to
evaluate the site for a proposed on-site sewerage system.
For test hole No. 1, the observed percolation rate was
20 minutes per inch. No water table was observed'during the
drilling of test hole No. 1, but when the hole was left
'overnight to saturate, the water level seemed to stabilize
at 6'.
Due to the high water level, no percolation test was attempted
on test hole No. 2. Approximately 24 hours after the hole
was drilled, the static free water level was observed at
approx. 4'. As the soils in hole No. 2 are similar to but
slightly sandier than hole No. 1, the percolation rate of
test hole No. 2 should be slightly faster than hole No. 1.
The water level depths given should be used with caution as
the water table normally fluctuates with precipitation and
with the seasons.
We hope this report meets your present needs. If we can be
of further service please do~ not hesitate to contact us.
Yours very truly,
ALA S KA TE S TLA B
RMH: mm
· ' Approved:
Laboratory Supervisor
R. Mark Hansen
Attachments
.CAMPBEll AIRSTRIP
THIS
PROJ E C.'T'
D3
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O.
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TABLE A
Test Hole No. 1
WO#8819
Dec 22, 1975
Logger: W.O.
Depth in Feet
From To
SOIL DESCRIPTION
0 6.5.
F-4, Gravelly Sandy Silt, ML, gray, damp
6.5 10.0
.F-2, Silty Gravelly Sand, gray, damp
10.0 17.5
Bottom of Test Hole:
Frost Line:
Free Waterlevel:
SA.
NO.
De_p_th M %
5.0 i7.5
F-4, Gravelly Sandy Silt, ML, gray damp.
17.5 ft.
0.0-2.5 ft.
None observed while drilling.
Type of .Dry
Sample. Strength
G M-L
2 10.0 10.0
G M
3 15.0 10.9
G M
Remarks:
1)
2)
4)
5)
Type of Sample, G=Grab, SP=Standard Penetration
Dry Strength: N=None, L=Low, M=Medium, H=High
General Information, see Sheet 1
Frost & Textural'Classification, see Sheet 2
Test Hole No. 2
TABLE A
W0~8819
Dec 23, 1975
Logger: W.O.
Depth in Feet
From To
0 15.0
SOIL DESCRIPTION
F-2, Silt~ Gravelly Sand, gray, wet @ 10'
saturated @ 15'
Bottom of Test Hole:
Frost Line:
Free Waterlevel:
15.0 ft.
0.0-2.0 ft.
10.0 ft. while drilling
SA.
NO. Depth M%
1 5.0 25.6.
'2 10.0 11.0
3 15.0 Saturated
Type of Dry
Sample Strength.
G L
G L
G --
Remarks:
2)
4)
5)
Type of Sample, G=Grab, SP=Standard Penetration
Dry Strength: N=None, L=Low, M=Medium, H=High
General Information, see Sheet 1
Frost & Textural Classification, see Sheet 2
SOIL CLASSIFICATION CHART
30°~0 GRAVEL
:laY
CLAYEY CLAYEY ~.
CLAYEY CLAYEY
\ OR -"
OR
SILTY SILTY
SILTY
S I LTY
__42
SAND GRAVEL
GRAVELLY SAND SANDY GRAVEL
SAND GRAVELLY SAND ~IDY GRAVEL GRAVEL
\ o
0 10 20 30 40 50 b0 70 80 90 100
,GRAVEL (+ .¢4 SCREEN) % BY WEIGHT
NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS TI-dAN 3% FINER THAN 0.02 mm.
GROUPS OF FROST-SUSCEPTIBLE SOILS:
F1 GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 mm.
F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm.
F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm. AND SANDY SOILS
(EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm.
b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS.
· F4 a. ALLSIL~'S INCLUDING SANDY SILTS.
b. FINE SILTY SANDS CONTAINING MORE THAN 15% FINER THAN 0.02 mm.
c. LEAN CLAYS WITIt PLASTICITY INL)EXES OF LESS TI-tAN 12.
d. VARVED CLAYS.
Test Hole Log - Description Guide
The soil descriptions shown on the logs are the best estimate of the soil's
characteristics at the time of field examination and as such do not achieve the
precision of a laboratory testing procedure. If the log includes soils samples,
those samples receive an independent textural classification in the laboratory
to verify the field examination.
'The logs often include the following items:
Depth Interval - usually shown to 0.1 foot, within that zone no
significant change in soil type was observed through drill actiou, direct
observation or sampling.
Frost Classification - NFS, Fl, F2, F3, F4, see "Soil Classification
Chart"
Texture of Soil - An engineering classification of the soils by particle
size and proportion, see "Soil Classification Chart", note the
proportions are approximate and modifications to the soil group due to
stratification, inclusions and changes in properties are included.
Moisture Content - th!s is a qualitative measure:
dry, no or little apparent surface moisture,
damp, moisture forms portion of color, less than plastic limit,
wet, no free water, often soft, if cohesive soil,
saturated, free water may be squeezed out, if a free draining soil;
dilatent at natural moisture content, if a non-plastic silt or fine
sand. (The moisture content is further definedby reference to PI,
LW, NP, M% or dilatency.}
Density - refers to more-or-less nbn-cohesive soils, such as sand gravel
mixtures with or without a fine fraction, derived frown drilling action
and/or sample data; usually described as: very loose, loose, medium
dense, very dense. Gen'eral intent is to portray earthwork
characteristics.
Stiffness - refers to more-or-less cohesive soils and fine grained silts of
the clay-silt groups. Derived from drill action and/or sample data. Very
soft, soft, stiff, very stiff and hard are commonly used terms.
Particle size - The largest particle recovered by the split spoon is
1-3/8", Shelby tube Y', auger flights (minute-man) 2", Auger flights
(B-SO hollow stem) 6"-8". Larger particles are described indirectly by
action of the drilling and are referred to as cobbles, 3" to 8", or
boulders 8"+. Therefore when reviewing thc gradation sheets, if any,
the description on the hole log inust be considered for ail indication of
larger particles.
Unified Soil Classification - This is a two letter code. See Unified
Classification sheet for further definition. In some cases AASHO aud/or
FAA soil classifications may be shown ;is well as the unified.
Atterberg Limits- usefnl for fine grained and other plastic soils.
P.~I; natural moisture content believed to be less than plastic limit
PI+; natural moisture content believed to be between plastic aild liquid
limits
1,._2w_4.; natural nloisture contcut believed to be greater than liquid limit
NP; non-lilastic, u:;eful as ii modifying description of some silty
materials.
!)ils~t_.se_n_S~ -- is the ahility of water to migrate to tile surface of a
saturaled or nearly saturated soil sample when vibrated orjolted -- used
',ts ill! aid to dclcrmine if a fine grained soil is a slightly or non-plastic
silt or a volcan{c ash.
Rock flour - finely ground soil that is not plastic but otherwise appears
~ clayey silt.
Organic Content - usually described as Peat, PT, sometimes includes
discrete particles such as wood, coal, etc. as a modifier to an inorganic
soil. Quantity described as; trace, or an estimate of volume, or, in case
of all organic, - as Peat. This may include tundra, muskeg and bog
material.
Muck - a modifier used to describe very soft, semi-organic deposits
~y occuring below a peat deposit.
Amorphus pe~t - organic particles nearly or fully disintegrated.
Fibrous Peat -- organic particles more-or-less intact.
Bottom of Testhole - includes last sample interval.
Frost Line - seasonal frost depth as described by drilliug action and/or
samples at the time of drilling.
Frozen Ground - other than frost line, described by samples, usually
includes description of ice content, often will include modified Uuifie~
Classification for frozen soils - this is a special case related to
permafrost studies.
Free Water .Level -- The free water level noted during drilling. This is
not necessarily the static water table at the time of drilling or at other
seasons. Static water table determination in other than very permeable
soils requires obserw~tion wells or piezometer installations, nsed only in
special cases.
Blow/6" - The numher of blows of a 140 weight free falling 30" to
adwmce a 2" split spoon 6"; the number of blows for a 12" advance is,
by definition, the standard penetration.
M% - natural moisture content of the soil sample, usually uot.
performed on clean sands or gravels below the water table.
'Type of Sample ---
SI~, refers to 2" split spoon driven into the soil by 140 pound
weight, a distm'bed sample,
~, thin wall tube, "Shelby" used to obtain undisturbed samples
of fine grained soil,
~, "grab" disturbed sample from auger flights or wall of trench,
~, cut sample, undisturbed sample fi'om wall of trench.
~ry Strength - a nsefulindicator of a soil's clayey fi'action, N=None,
L=Low, M =Medium, H=High
Group .- The sa~nples are placed into apparently similar groups based
on color and textnre an(t arc arbitrarily assigned a group letter, l':urther
disturbed tests including Attcrbcrg Limits, grain size, moisturc..deusity
relationshij), etc.. may be performed on thc group and are assumed to
reflect thc geueral distruhed characteristics of thc soils assigned to thc
grotlp. This is an imp(~rtant l)l~ase of the soil analysis and is used to
standardize the varlotl5 qualilativc determinations and Io reduce thc
number'of (]uantitalive tests ileoessilry to describe the .soil mass.