HomeMy WebLinkAboutPROSPECT HEIGHTS BLK 1 LT 9
825 "L" S'T REE1-
ANCHO~qA at:, ALASI(/\ 99501
(907) 2(}4 4.1 I 'i
January 4, 1982
Gary Mercer
Route 1, Box 482 C
Vashon, Washington
98070
Permit ~ 810140
Subject: L9 Bi PROSPECT HTS.
A permit issued by this department for a well and/or sewer
system has expired as of December 31, 1981.
Permits are issued on a calendar year basis, as stated on
the permit, by authority of Municipal ordinance.
If you have drilled the well, a well log should be sent to
this department to document the installation date.
If an engineer inspected the installation of the on-site
sewer system, please have them send us the as-builts for our
files.
If there are any further questions, please call this office
at 264-4720.
sincerely,
Sewer and Water Program
Enclosure: Copy of Permit
~M..UNICIPALITY OF ANCHORAGE
Departmen't I ~ Health and Environmental ~otection
t, 825 L Street, Anchorage, AK. 99501
264-4720
~' * * * HANDWRITTEN PERMIT * * *
WELL AND/~ ON-SITE SEWER PERMIT
Mailing Address:
Applicant: G/:~5v ~L~_~(~"__ ~
Phone Number:
Legal Description: L77 q g/~L'I
Type of Soil Absorption System Is:
Trench: Dra£n.field: ~_
Seepage Bed:
Holding Tank:
Maximum Number of Bedroom'~:
~ ~--w /J The Required Size of
DEPTH LENGTH
The length dimension is the length(in
depth of a trench or pit is the distal
the bottom of the excavation(in feet)
The gravel depth is the minimum de
the bottom of the excavation(in feet
* * REQUIRED SEPTIC
Permit applicant has the res~
installation inspections of any
of residences that the well will se]
Soil Rating(sq.ft/br) /~0
Soil Absorption System Is:'
DEPTHS. ' _ WIDTH
~t) of t~e trench or drainfield. The
)etween the surface of the ground and
e ~s no set width for trenches.
between the outfall pipe and
K SIZE - /00~_~ GALLONS * *
inf~ this~de~artment during the
ace~ to thi~operty and the number
* * * TWO
ECTION ARE REQ
i ~ approval by this department
Backfilling/~f any syst~
will be subject to pros~
Minimum distance betwee~ well
for a privat~well~.or 150 200
of public well.~---~Minimum
is 25 feet and to ~ community zs 75 . Well logs are required
and must be returned to this department within 30 days of the well completion.
Other requirements~ay apply] Spe~'fications~a~ conduction diagrams are
available to insure~proper ~/stai~~
* \*
(l)
(2)
(3)
disposal system is 100 feet
well depending upon the type
well to a private sewer line
Signed:
SWP/024 (1/81)
/
I am familiar with t~e requirements for on-site sewers and wells as
set forth by the Municipality of Anchorage.
I will install the /system in accordance with codes.
I understand that ~he on-site sewer system may require enlargement if
the residence is ~emodeted to include more that 3 bedrooms.
- -
4040 "B" STREET
ANCHORAGE, ALASKA 99503
(907) 278-1551
August 11, 1980
W.O. #A19368
Mr. and Mrs. Gary Mercer
Route 1, Box 482C
Vashon, Washington 98070
Subject: On-Site~Wastewater Disposal System, Lot 9, Block 1,
Prospect Heights Subdivision
Dear Mr. and Mrs. Mercer:
Attached to this letter are copies of two subsurface investiga-
tions done on the above referenced lot to determine the suitability
of the lot for on-site disposal of wastewater. The first report
is dated August 22, 1975 and was done for a Ms. Lorraine Tanes,
who was contemplating purchasing the property from you at that
time. There was surface water observed on the site and it was
anticipated that there might be a problem with high ground water.
Three borings were placed and the water table was determined to
exist within 10 to 15 feet below the ground surface.
The second report is dated July 28, 1980 and was performed after
some corrective action had been taken on your part at the lot.
It is our understanding that you have constructed some ditching
and had done some regrading around the perimeter of the lot to
get the surface water off the northern end of the lot and restrict
it to the small stream on the south end of the lot. Surficially,
the results of that effort appear to have been successful as the
amount of surface water observed on the lot had been reduced
substantially. However, two test borings placed at that time
indicated that the free water table had risen to within five to
six feet of the ground surface. This is not surprising considering
the very wet conditions that have existed for the last two years
in the Anchorage area. We would anticipate, however, that the
water table as observed at the time of this more recent exploration
is pretty close to the maximum elevation of the water table.
Because the State of Alaska, Department of Environmental Conservation,
regulations does not allow the placement of an on-site sewage
disposal system within four feet of the water table, this does
present some problems in terms of disposal of effluent from the
septic tank system on this lot.
Therefore, we discussed this situation with Mr. Les Buckholtz of
the Municipality of Anchorage, Department of Public Health and
Environmental Protection. We described the conditions on the lot
Mr. and Mrs. Gary Mercer
August 11, 1980
page Two
and the fact that there is a substantial amount of topographic
relief to the property, with the property sloping from the north
to the south. He indicated to me that it was possible to have
the Municipality design a system for you that would meet State of
Alaska, Department of Environmental Conservation, regulations and
still operate from a practical standpoint. Such a system would
have the pipes for the leach field to be essentially at the
existing ground surface. The trenches for the pipes would be at
~east fo~_~et wide.-~ All'of the natiV~ silt and peat and sil{~
~d would be ex~.~down to just above the water table and
backfilled wit~ Washed rock as requlre~ Dy the Municipality.
Another foot of clean rock, or gravel, would be placed above the
pipe over the existing ground surface, with insulation placed on
top of that and then another three feet of silty, native fill
compacted and placed over the top of that. This mounding of the
system and insulation will protect the system from freezing. The
surface over the top of the pipe should be graded and drained so
the standing water will not accumulate over the leach field.
The ~o~1~11 actuall~be accepting the effluent from the
leach field will be the F-2, silty sands, Unified Classification
pM, that is in the upper four or five feet of the soil profile.
ercolation test was run in this material during the original
investigation in August of 1975. The results of that percolation
test were five minut~ p~ ~n~h. However, because of the type of
~-~esign that will be required, we recommend using a more conserva-
tive value of~150 square fe~e~ per bedroom in the design of the
leach field.
When you take this letter, and the attached two reports to the
Municipality, Department of Public Health and Environmental
Protection, it is important that you be sure to point out to them
that you want a shallow, leach field with wider trenches and the
insulation and the mounding over as discussed with Mr. Buckholtz.
If questions arise with those assisting you at DPHEP, you might
suggest that they discuss this particular lot and system with Mr.
Buckholtz, as he should be familiar with it based on our discussions.
Very sincerely,
ALASKA TESTLAB
Melvin R. Nichols, P.E.
Manager
MRN/mg
Attachments
Test Hole #1
Table. A
WO #A19368
Date: 7/23/8b '
Logged by: T. Barber
Depth in Feet
From To
0.0 2.0
2.0 6.0
6.0 10.0
Soil Description
Brown Sand~ Silt.and Peat mixed, fill
F-2, olive-brown Silty Sand, medium to coarse
sand, wet, dense, SM
Gray-brown Silt~ Gravell~ Sand, medium to coarse
angular sand, saturated .,
Bottom of Test Hole:
Frost Line:
Free Water Level:
10.0 Feet
None Observed While Drilling
6.0 Feet
· 'Test Hole #2
Table B
WO #A19368
Date: 7/23/80 ~
Logged by: T. Barber
Depth in Feet
From To
0.0 6.0
6.0 7.0
Soil Description
Olive to brown Silty Sand, medium to coarse
snad, moist to saturated
Olive Silty Gravell~ Sand
Bottom of Test Hole:
Frost Line:
Free Water Level:
7.0 Feet
None Observed While Drilling
5.0 Feet
PHoN : oz-2z% S
August 22, 1975
W0 #17479
Ms. L6rraine Tanes
6620 East 9th Avenue
Anchorage, AK 99504
Subject: Subsurface Investigation for On-Site Sewer
Lot 9, Block 1, Prospect Heights Subdivision
Dear MSo Tanes:
As requested by Mro Ken BeI1, %~e conducted a subsurface
exploration on the above referenced property on Tuesday,
August 21, 1975o This explo~ati?n consisted ~f placing
three test holes to depths o~ 15 t 10 and 16 o Enclosed is
a location' sketch showing the approximate placement of these
test holes° '
All drilling was done utilizing a Mobile Drill B-50 drill
rig mounted on a Flextrac-Nodwell tracked vehicle owned and
operated by Denali Drilling, Inco Drilling was supervised
and the test holes logged bY Mro OoMo Hatch, senior technician/
staff geologist with Alaska Testlabo Table A is the logs of
these test holes° Also attached are three sheets of standard
explanatory information that should be utilized to properly
interpret the data contained in the test hole lOgSo
A primary objective of the exploration was to find a loca-
tion on the lot where the water table was low enough to
accomoda~e an on-site sewage system° It was suspected that
the water table was relatively high at this site and this
was proven to be true by the exploration°
In the area of test holes #1 and #2, the water table was at
10' which necessitated test hole #3 where the water table
was found to exist at 15'. It should be noted that the
water level noted on the .test hole logs is for the date of '
exploration only and that the water table will fluctuate
with seasonal and climatic changes°
~3 ~ '
The soils in test' hole t~ , by vzsual Inspection, appeared to
be quite permeable and probably under a normal circumstance
would not ]]ave required the percolatiQn tes~, but to keep
the absorption area requirement to ~ minimum, and thus be
able to k~ep the seepage area as far above the water table
as possible we ran a percolatiou test.
Ms. Lorrai]~e Tanos
Augu.~t 22, 1975
Page_ .2.
The test hole ~i3 was initially filled with water on the date
of exploration - August 19, 1975~ The water was allowed to
perco].ate from the hole overnight and was reinspected at
9:15 a.m. on August 20, 1975, at w~ich time water was again
placed in the test hole, to a dcpth of 3' below the ground
surface. The water level was then monitored in the test
hole until 10:45 aom. at which time the water level was 4.8'
below the ground surface. This calculates to a percolation
rate of 5 min/in., and utilizing Table A, "Absorption Area
Requirements for Individual Residences" on Page 8 of the
"Manual of Septic Tank Practice" published by the UoS.
Department of Health, Education & Welfare, the required
absorption area per bedroom for soils with such a percola-
tion rate is 125 square feet°
We trust that this information is sufficient for your present
needs° If we can be of further service or provide clarifi-
cation for the data presented please do not hesitate to
contact USo
Sincerely yours,
ALASKA TESTLAB
Melvin R. Nichols, C.Eo
Laboratory Supervisor
MRN:rb
Enclosures
/
/
.Test llole #1
Depth in Feet
From To
0o0' 0.5'
0o5' 1.5'
1.5' 5.0'
5.0' 15.0' ....
Table A
WO #17479
Soil Description
F-4~ brown Peat, Pt, and organic overburden
F-4, brown Sandy Silt, ML, damp, soft to
stiff, NP.
F-2, brown to olive Silty Sand, SM about
35% silt, damp, medium density.
F-l, brown Silty very Sandz Gravel, to
Silty very Gravelly Sahd, SW/S~I, 10-15%'silt,
wet to saturated~ medium density~ maximum
particle size 3"
Bottom of Test Hole:
Frost Line:
Free Water Level:
S'amp 1 e_ Depth
1 2.5
2 5.0'
3 7.5'
4 10.0'
5 15.0'
15.0'
None
10.0'
Type of
Blows/6'~ M% S__ample
.... Grab
.... Grab
.... Grab
.... Grab
.... Grab
Dry
Strength Group Unified
SM
sw/s
SW/SM
SW/S
SW/SM
Remarks:
2o
3o
4o
5°
6o
7.
Type of Sample, G=Grab, SP = Standard Penetration.
Dry.Strength, N=None, L=Low, M=Medium, ~?High.
Group refers to similar material~ this study only.
Unified Classification, see Sheet 2.
Frost and Textural Classification, see Sheet 1.
General Information, see Sheet 3o
Other Information, see Sheets 4 through 7.
· Test Hole #2
D__epth in Feet
From To
0o0' 0.5'
0°5' 1.5'
I .5° 6o0'
6.0' 8.0'
8.0' 10.0'
Table A
WO #17479
S~il Description
F-4, brown Peat, Pt, organic overburden,
damp, soft°
brown Sandy Silt, ML, damp~ soft to
stiff~ NPo
F-2~ brown to olive Silty Sand, SM, 35%±
silt, medium density.
F-2, brown Silty Gravelly Sand, SM, 10-20%
silt, wet to sauurated, medium density,
maximum particle size 1"
F-l, brown Silty, very Sandy Gravel,
10-20% silt, saturated, medium density,
maximum particle size 3".
Bottom of Test Hole:
Frost Line:
10o0'
None
Remarks: Hole sloughed at 8.0'
Free Water Level:
10o0'
Sample Depth
1 2°5'
2 5.0'
3 7.5'
4 10.0'
Type:of Dry
Blows/6" M% Sample Strength
G
G
G
G
Group Unified
-- SM
-- SM
-- SM
, -- GM
Remarks:
2.
3.
4.
5o
6.
7.
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Streng.th, N=None, L=Low, M=Medium, H=Higho
Group refers to similar material, this study only.
Unified ClassificatJ. on, see Sheet 2.
Frost and Textural Classification, see Sheet 1.
General Information, see Sheet 3o
Other Information, see Sheets 4 through 7.
· Test IIole #3
_Depth in Feet
From To
0.0' 0.5'
0°5' 5.0'
5.0' 11.0'
11.0' 16o0'
Bottom of Test Hole:
Frost Line:
Free Water Level:
Table A
WO #17479
'Soil Description
F-4, brown Sandy Silt, ML, damp, soft to
stiff, NP.
F-2/F-4, brown Silt~ Saoq, SM, damp~ medium
density°
F-2, brown Silty Gravelly Sand, SP/SM, 10-15%
silt (10%± at 10'), damp, medium density.
F-2, brown very Silt~ very Gravelly Sand, SP,
25%!, damp to wet, maximum particle size 6"
16.0'
None
15.0'
Sample
Depth
10.0'
15.0'
Type of Dry
Blows/6" M% Sample Strength Group Unified
-- G .... SP/SM
-- G' -- -- SP
Remarks:
5o
6o
7o
Type of Sample, G=Grab, SP = Standard Penetration°
Dry Strength, N=None, L=Low, M=Mediumt tt=Higho
Group refers to similar material, this study onlyo
Unified Classification, see Sheet 2o
Frost and Textural Classification, see Sheet
General Information~ see Sheet 3. '~
Dther Information, see Sheets 4 through 7o
SOIL
CLASSIFICATION
CHART
30% GRAVEL
CLAY
t CLAYEY/\ CLAYEY I
CLAYEY '~'
..CLAYEY
OR
SILTY
SILTY SILTY
SAND
GRAVELLY SAND SANDY GRAVEL
\ \ \ \/
/
SAND GRAVELLY SAND SANDY GRAVEL
\
0 10 20 30 40 50 60 70
SILTY
GRAVEL
GRAVEL
GRAVEL (+¢4 SCREEN) % BY WEIGHT
NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0.02 mm.
GROUPS OF FROST-SUSCEPTIBLE SOILS:
F! GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN O.O2 mm.
F2 SANDY SOILS CONTAINING BEI'WEEN 3 AND 15% FINER THAN 0.02 mm,
F3 a. GRAVELLY SOILS CONTAINING MOHE THAN 20% FINER THAN 0.02 mm. AND SANDY~OILS
(EXCEPT FINE SILTY, SANDS) CON I'AINING MORE TtlAN 15% FINER TITAN 0.02 mm,
b, CLAYS WITH PLASTICITY INDEXES Of: MORE TITAN ].2. EXCEPT VARVED CLAYS,
F4 a. ALL SILTS INCLUDING SANDY SILTS.
b. FINE SILTY SANDS CONI'AINING MORE THAN t5% FINER TttAN 0.02 mm.
c. LEAN CLAYS WlTtt PLASTICITY INDEXES OF LESS THAN ].2,
d, VARVEO CLAYS.
80 90 100
Test Hole Lo9 - .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 exantination.
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 action, direct
observation or sampling.
Frost Classification - NFS, FI, 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 mt~difications to the soil group due to
stratification, inclusious and changes in properties are included.
Moisture Content -. this is a qualitative measure:
dry, no or little apparent surface moisture,
damp, moisture forms portion of color, less thau plastic limit,
wet, no free water, ofien soft, if cohesive soil,
saturated, free water may be squeezed out, ifa free draining soil;
dilatent at natural moisture content, if a non-plastic silt or fine
sand. (The moisture content is further defined by reference to PI,
LW, NP, M%or dilatency.)
Density - refers to more-or-less non-cohesive soils, such as sand gravel
mixtures with or without a fine fraction, derived from drilling action
and/or sample data; usually described as: very loose, loose, medium
dense, very dense. General intent is to portray earthwork
characteristics.
Stiffness - refers to more-or-less cohesive soils and fine grained silts of
~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, Y' to 8", or
boulders 8"+, Therefore when reviewing the gradation sheets, if any,
the description on the hole log must be considered for an:indication of
larger particles.
Unified Soil Classification - This is a two letter code. See Unified
Classification sheet for further definition. In some cases AASHO and/or
FAA soil classifications may be shown as well as the unified.
Atterberg Limits - useful for fine grained and other piastic sobs.
PI; natural moisture content believed to be less than plastic limit
P}+; natural moisture content believed to be between plastic and liquid
~mits
L..__~; natural moisture content believed to be greater than liquid limit
lq.~P; non. plastic, useful as a modifying description of some silty
materials,
DiIatency - is the abdity of water to migrate to the sm'face of a
saturated or nearly saturated soil sample when vibrated or johed -- used
as alt aid to determine if a fine grained soil is a slightly or non.plastic
silt or a ~volcanic ash.
Rock flour - finely ground sob that is not plastic but otherwise appears
similar to a clayey sbt.
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 depo.sits
u~'~y occuring below a peat deposit.
Amorphus peat - 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 drilling 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 Unified
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 otber than very permeable
soils requires observation wells or piezometer installations, used only
special cases.
Blow/6" - The number of blows of a 140 weight free failing 30" to
advance a 2" split spoon 6"; the number of blows for a 12" advance is,
by definition, the standard penetration.
,,,t% - natural moisture content of the soil sample, usually not
performed on clean sands or gravels below the water table.
Type ofSampl~ -
SP, refers to 2" split spoon driven into the soil by 140 pound
weight, a disturbed sample,
S, thin wall tube, "Shelby" used to obtain undisturbed samples
of fine grained soil,
C,,, "grab" disturbed sample from auger flights or wall of treno~,
C, cut sample, undisturbed sample from wall of trench.
Dry Stren t~z~ - a useful indicator of a soil's clayey fraction, N=None,
[.=Low, M=Medium, H=High
Group - The samples are placed into apparently similar groups based
on color and texture and are arbitrarily assigned a group ',etter. Further
disturbed tests including Atterberg Limits, grain size, moisture-density
relationship, eec. may be performed on the group and are ass~nled to
reflect the general distrubed characteristics of the soils assigned to thc
group. This is an important phase of the soil an.dysis and ~s used to
standardize the vartous qualitative determinations and to reduce the
number of quantitative tests necessary to describe tile ~oil mass.
Oc~.ober 2, 1972
Kincaid and Son ConstrucCion Co.
7btJ Jodpner Street
~'~ec~: Soils Analysis for Lot 9, Block 1
Pro~pec~ Heig,Cs Subdivisions.
!)~ar llr'. K'ii~caid:
~u~Jject soils analysis conduci;:-~'1
indica;-,~4 hich water .... '~ ...... Ii an~ oroxiv'.'i~v
.~. , j boO,U, (j~SO soil ...... LioFIS , -
~, 071~ t COil-
to wa~er se~~ and a spriIl~ );;lus ~he steel tonogra,-'., taus
.... ,=, ~<,,, disposal
clude Cha% t:,is lob i:; unsHStable for on-siOz s~,~j.- ·
Very truly yours
c.~ Supervisur
Environmental Servi n' ,
b~
LI o.vd S. Cluff
George E. Henvent
B,A.Vallerge
William T. Black
3201 Spenapd Road
Anchopage,A~aska 99503
(907) 272.-2407
Project No. A12109-3
September 27, 1972
Mr. David Kincaid
Kincaid and Son Construction Co.
780 Jodphur Street
Anchorage, Alaska 99502
Dear Mr, Kincaid:
Subject:
Test Pit Inspection
Lot 9, Block 1 - Prospec~ Heights Subdivision
Prospect Drive
Anchorage, Alaska
At your request, the undersigned inspected and logged the vertical
· soil profile of the subject test pit on September 26, 1972 at the
approximate location shown in Figure 1. The soil and free ground
water profile is shown in Figure 2.
Figure 1 is not to scale as no plot plan was available at the time
of the inspection. Also, the soils were classified visually and .
absorbtion values assigned accordingly on the basis, of experience
and printed guidelines of the Greater Anchorage Borough.
It should be noted that free ground water was encountered in the
test pit.'at a-depth of six feet below the ground surface. Seepages
.were also observed in the footing ~xcavation on the east side of
the proposed house and a spring observed at the approximate loca-
tion shown in Figure 1.
If we'caff be of any further service to you, please call.
Very truly yours,
WOODWARD-LUNDGREN & ASSOCIATES
Rodney P;/ Kinney, P.E.
Chief Engineer
RPK :nck
Attachments
OAKLAND SAN JOSE SAN'FRANCISCO ANCHORAGE, ALASKA
CASING
I Geologist
SAMPLE DESCRIPTION ~ ~ (drilling fluid~ depth of
colo& moistu,e, po:ticle ~2~',-"~ oosing, cosine blows,
· ~ fluid loss, bit condi-
size, consistency ~o~ ~1
~o~i tion, crowd, rprn, e'~c.)~
-i
-i