HomeMy WebLinkAboutT12N R3W SEC 23 S-5349
::, NIUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION
ENVIRONMENTAL HEALTH CASE REVIEW WORK SHEET
~ PLATTING BOARD ~ PLANNING & ZONING
CASE NU~IBER NAME : . .
DATE RECEIVED
April 2, 1980
COMMENT TO PLANNING BY
April 23, 1980
FOR MEETING OF CASE OF
~ PUBLIC WATER NOT AVAILABLE TO PETITION AREA
~ PUBLIC SEWER NOT AVAILABLE TO PETITION AREA
REVIEWER'S COMMENTS:
71-014 (Rev. 2/78)
4040 "B" STREET
ANCHORAGE, ALASKA 99503
(907) 278-1551
November 9, 1978
W.O. I~A18703
Grid t~2738
Alaska Land Development Services
4546 Business Park Blvd.
Anchorage, AK 99503
Attention:
Subject:
Steve Brown
Subsurface Investigation for
Ravenswood Subdivision
the Proposed
Dear Steve:
As requested, %~e have completed the preliminary soils work
for the above project. This investigation includes sixteen
test holes. Transmitted with this report are the following:
Vicinity Map Figure 1
· Test Hole Location Sketch .Figure 2 '
Test Hole Logs Table A
Explanatory Information Sheets 1-3
Grain Size Distribution Curves Sheets 4-8
Exploration was conducted on October 30th through November 1,
1978. A Nodwell mounted B-50 rig owned and operated by
Denali Drilling, Inc. was used for the exploration. The rig
was equipped with a solid flight auger. Exploration was
supervised and the test holes logged by Mr. O.M. Hatch,
geolbgist/senior technician with Alaska Testlab. Percolation
tests were performed by Mr. T.K. Krupka, technician with
Alaska Testlab. Table A is a log of the test holes reflec-
ting field ~bservations and visual classification of the
soils.
Test hole locations are shown on Figure 2. The ground
surface was wet in areas shaded on Figure 2. Within the wet
areas, we do not believe on-site sewage disposal systems
could be successfully operated. It is our opinion that
outside the shaded areas, the site will be suitable to the
use of on-site sewage disposal systems.
S.5 '7 1980
Alaska Land Development Services
Nov~nber 9, 1978
Page 2
Four percolation tests were performed. For the tests, when
drilling was completed, a 3/4" slotted PVC pipe was inserted
in the hole. Before the tests were performed, holes were
checked for any free water. The hole was then filled with
water and left overnight to saturate. Upon returning the
next day, the hole was refilled with water and the drop in
the water level carefully monitored over the next 60 minutes.
Using the abgve test, percolation rates were as follows:
Required
Test Hole Rate sf/Bedroom
2 4.4 120
3 4.4 120
7 20..0 215
9 8.9 155
Free ground water, where observed, is noted on the test hole
logs. It should be realized that the free water level may
fluctuate seasonally or with percipitation.
It is trusted the above meets your present requirements and
is sufficient for planning purposes. If you have any
questions of if we may be of further assistance, please do
not hesitate to contact us.
Very sincerely,
ALASKA TESTLAB
R. Mark Hansen
Approved:
Melvin R. Nichols, PE
Laboratory Manager
RMH:rb:nm]
Enclosures
Tes~ Ilole #1
Table A
WO #A18703
Logged By: O.M. Hatch
Date: 10-30-7~
Depth in Feet
From To
0.0' - 1.5'
1.5' - 11.0'
11.0' - 1S.0'
Soil Description
Brown Peat (Pt), damp, soft.
NFS/F-l, brown slightly Silt~ Sand~ Gravel
(GP-GM), poorly graded, all sand sizes, damp,
medium density, rounded particles to 3", more
sand and less gravel at 10'.
F-2, brown Silty Sand (SM), poorly graded,
all sand sizes, damp, medium density.
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth
I 5.0'
2 10.0'
16.0'
None Observed
None Observed
Type of
M% Sample
5.6 G
5.3 G
Dry
Strength ~roup Unified
N A GM
N B SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #2 Table A
Hatch
WO #A18703
Logged By: O.M.
Date: 10-30-78
Depth in Feet
From To
0.0' 1.0'
1.0' - 4.0'
4.0' - 6.0'
6.0' - 11.0'
11.0' - 15.0'
Soil Description
Brown Peat (Pt), damp, soft.
F-4, brown Sandy Silt (ML), damp, stiff, NP.
F-2, brown Silty Sand (SM), poorly graded,
all sand sizes, damp, medium density.
F-3, brown very Silty Gravelly. Sand (SM),
poorly graded, all sand sizes, d~mp; medium
density, subrounded particles to 2".
F-l/F-3, brown very Silty Sandy Gravel (GM),
poorly graded, all sand sizes, damp, medium
density, subrounded particles to 3".
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth M__%
1 5.0' 8.3
2 10.0' 9.1
3 15.0' 10.0
15.0'
None Observed
None Observed
Type of Dry
Sample Strengt~
G
G N
G L-N
Group Unified
C SM
D SM
D SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetrati6n,
U = undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information., see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #3
Table A
WO #A18703
Logged By: O.M. Hatch
Date: 10-30-78
pepth in Feet
From To
0.0' - 1.5'
1.5' - 7.0'
7.0' - 11;0'
11.0' - 13.0'
13.0' - 15.0'
Soil Description
Brown Peat (Pt), damp, soft.
F-l, brown very Silty Sandy ~ravel (GM), poorly
graded, few cobbles, all sand sizes, damp,
medium density, subrounded particles to 4"
F-4, brown Gravelly Sandy Silt (ML), damp,
stiff, subrounded particles to 3"
F-l, brown Silty Sandy Gravel (GM), poorly
graded, all sand ~izes, damp, medium density,
subrounded particles to 3".
F-4, brown Gravelly Sandy Silt (ML), damp,
stiff, subrqunded particles to 3".
Bottom of Test Hole:
15.0'
Frost Line:
None Observed
Free Water Level:
None Observed
Sample Depth
Type of Dry
M% Sample Strength Group Unified
1 5.0'
2 10.0'
3 15.0'
4.5 G N A GM
8.9 G N E SM
8.0 G N E SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=~ow, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #4
Table A
WO t~A18703
Logged By: O.M.
Date: 10-30-78
Hatch
~epth in Feet
From To
0.0' - 1.5'
1.5' - 5.0'
5.0' - 11.0'
11.0' 15.0'
Soil Description
Brown Peat (Pt), damp, soft.
F-4, brown Gravelly very ~andy Silt (SM),
poorly graded, all sand sizes, ~amp, stiff,
NP, subrounded particles to 2".
F-2, brown slightly Silty Sand (SP-SM), trace
gravel, poorly graded, all sand sizes, damp,
medium density, subrounded particles to
F-3, brown Gravelly very Silty Sand (SM),
poorly graded, all sand sizes, damp, medium
density, subrounded particles to. 2"
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth
I 5.0'
2 10.0'
3 15.0'
15.0'
None Observed
None Observed
Type o~
Sample
7.8 G
G
7.7 G
Dry
Strength Group Unified
N E SM
N E SM
Remarks:
1. Type of Sample, G=Grab, SP = Standard Penetration,
U = undisturbed.
2. Dry Strength, N=None, L=L0w, M=Medium, H=High.
3.' Group refers to similar material, this study only.
4. General Information, see Sheet 1.
5. Frost and Textural Classification,.see Sheet 2.
6. Unified Classification, see Sheet 3.
Test IIole #5
Table A
WO #Al 8703
Logged By: O.M. Hatch
Date: 10-30-78
_Depth in Feet
From To
Soil Description
0.0' - 1.5'
1.5' - 8.0'
Brown Peat (Pt), damp, soft.
F-3, brown to grey very Silty Gravell~ ~and
(SM), poorly gradedr all sand sizes, da/np,
medium density~ subrounded particles to 3".
Grey and clayey below 3'.
8.0' - 11.0'
NFS to F-2, grey to brown Gravelly Sand
(SP-SM), slightly silty, saturated,--medium
density, rounded and subrounded particles
to 2", NFS at 10'
- 11.0' - 15.0'
F-4, grey Gravell~ Sandy Silt (ML), damp to
wet, stiff, Pi+.
Bohtom of Test Hole:
15.0'
Frost Line:
None Observed
Free Water Level:.
8.0' while drilling
1.5' after drilling
.Samplq Depth
I 5.0'
2 10.0'
3 15.0'
Type of Dry
M% Sample Strength Group Unified
8.4 G L A GM
10.7 G L-M A GM
13.9 G L-M E SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low,' M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole ~6
Table A
WO #A18703
Logged By: O.M.
Date: 10-30-78
llatch
pepth in Feet
From To
0..0' - 2.0'
2.5.' - 15.0'
Soil Description
Brown Peat (Pt), damp, soft.
F-2, brown Gravelly Sand (SP-SM), slightly
silty, poorly graded, all sand sizes, damp
to wet, medium, density, rounded and subrounded
particles to 2"
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth
I 5.0'
2 10.0
3 15.0'
15.0'
None Observed
None Observe~
'Type of
M% Samp 1.e..
9.6 G
9.5 G
7.3 G
Dry
Strength Group unified
N B SM
L A GM
L A GM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
unified Classification, see Sheet 3.
Test Hole #7
Table A
WO #A18703
Logged By: O.M.
Date: 10-31-78
Hatch
D~epth in Feet
From To
O.0' 1.0'
1.0' 6.0'
6.0' - 10.0'
10.0' - 13.0'
13.0' - 15.5'
Soil Description
Brown Peat (Pt), damp, soft.
F-l, brown Silty S__andz Gravel (GM), poorly
graded, few cobbles, all sand sizes, damp,
medium density, subrounded particles to 6".
F-4, brown ~andy Silt (ML), trace gravel,
damP, stiff.
F-1 to F-3, brown very Silt~ Sandy Gravel
(GM), poorly graded, ali sand si~s~ damp,
medium density, subrounded particles to
F-4, 'brown Sandy Silt (ML), with trace
gravel, dam~, stiff, ~qP.
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth
1 5.0'
2 10.0'
3 15.0'
15.5'
None Observed
None Observed
Type of
M% Sample
5.7 G
10.9 G
12.1 G
Dry
Strength Group Unified
N A GM
N E SM
L-N E SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers'to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural ClassifiCation, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #8
pepth in Feet
From To
0.0' - 1.5'
1.5' - 7.5'
7.5' 11.0'
11.0' - 13.0'
13.0' - 15.0'
Table A
WO #A18703
Logged By: O.M.
Date: 10-31-78
Soil Description
Brown Peat (Pt) and wood, damp, soft.
F-4, brown Gravelly very Sand~ Silt (SM),
damp, stiff~ NP, subround~ p~rt-~es to 2"
F-2, brown Silty Sand (SM) with trace gravel,
poorly graded, fine and medium grained, damp,
medium density..
F-l, brown ~ilty ~and~ Gravel (GM), poorly
graded, all sand sizes, damp, medium density
subrounded partlc~es to 2"
F-4, brown Sandy Silt (ML), damp, stiff,
NP, trace gravel.
Itatch
Bottom of Test Hole: 15.0'
Frost Line: None Observed
Free Water Level: None Observed
Type of Dry
M% Sample ~%rength GrouR Unified
Sample Depth __
I 5.0' 10.2 G N E SM
2 10.0' 10.5 G L-N E SM
3 15.0' 18.5 G M F ML
Remarks:
1. Type of Sample, G=Grab, SP = Standard Penetration,
U= Undisturbed.
2.' Dry Strength, ~[=None, L=Low, M=Medium, H=High.
3. Group refers to similar material, this stUdy only.
4. General Information, see Sheet 1.
5. Frost and Textural Classification, see Sheet 2.
6. Unified Classification, see Sheet 3.
Test llole #9
Table A
WO #A18703
Logged By: O.M.
Date: 10-31-78
Ilatch
D~epth in Feet
From To
0.0' - 0.5'
0.5' 1.5'
1.5' - 10.0'
10.0' - 15.0'
'Soil Description
Brown Peat (Pt).
F-4, brown Sandy ~ilt (ML), damp, soft to
stiff, NP.
F-4, brown Gravelly Sandy Silt (ML), damp,
stiff, NP, subro~-~e~ particles to 2".
F-4, brown Silt (ML), trace sand and gravel,
damp, stiff, NP.
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth M~%
I 5.0' 14.4
2 10.0' 19.9
3 15.0' 17.7
15.0'
None Observed
None Observed
Type of Dry
.Sample Strength
G L-M
G M
G L-M
Group unified
SM
AiL
ML
Remarks: 1.
3.
4.
5.
Type of Sample, G=Grab, SP = Standard Penetration,
U = undisturbed.
Dry Strength, N=None, L=Low, M=Medium, B=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test Hole #10 Table A
Ilahch
WO #A18703
Logged by~ 0.M.
Date: 10-31-78
Depth in Feet
From To
0.0' - 0.5'
0.5' - 15.5'
Soil Description
Brown Peat (Pt).
NFS, brown very Sanj~ Gravel (GP), poorly
graded, all sand sizes, damp, medium density,
subrounded particles to 3".
Bottom of Test Hole: 15.5'
Frost Line: None Observed
Free Water Level: None Observed
Type of
Sample Depth M% Sample.
I 5.0' 3.6 G
2 10.0' 4.1 G
3 15.0' 4.2 G
Dry
Strength Grou~ Unified
N G GP
N G GP
N G GP
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, ~=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test llole #11
Table A
WO #A18703
Logged By: O.M.
Date: 10-31-78
tlatch
Depth in Feet
From To
0.0' - 2.0'
2.0' - 8.0'
8.0' - 11.0'
11.0' 15.0'
Soil Description
Brown Peat (Pt), damp, soft.
F-3, brown very Silty Gravell~ Sand (SM),
damp, medium denszt-~--y, ~ubroun~e~rticles
to 2", becomes slightly less silty below 4'
F-2, brown ~ilty ~and (SM),
gravel, poorly.graded, all
medium density.
with trace
sand sizes, damp,
NFS to F-1 bro~ Gravelly Sand (SP-SM),
with trace silt, ~oorly graded, all sand
sizes, damp, medium density, subrounded
particles to 3".
Bottom of Test Hole: 15.0'
Frost Line: None Observed
Free Water Level: None Observed
Type of Dry
Sample Depth M% Sample Strength Grou~
1 5.0' 8.5 G N E
2 10.0' 9.5 G N C
3 15.0' 5.1 G N C
Unified
SM
SM
SM
Remarks: 1.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, ~=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see'Sheet 2.
Unified Classification, see Sheet 3.
Test Hole
Depth in Feet
From To
0.0' - 1.0'
1.0' - 5.0'
5.0' - 12.5'
12.5' - 15.0'
Table A
WO #A18703
Logged By: O.M.
Date: 10-31-78
~Soil Description
Brown Peat (Pt), damp, soft.
NFS brown Sandy Gravel (GP), poorly graded,
all sand sizes, damp, medium density, sub-
rounded particles to 2".
F-4, brown slightly Gravell~ Sand~ Silt (ML),
damp, stiff, NP, subrounded particles to 1".
F-l, brown very Silty Sandy Gravel (GM),
poorly graded, all sand sizes, damp, medium
density, subrounded particles to 3'.
Ilatch
Bottom of Test Hole:
Frost Line:
Free Water Level:
~ample Depth M_~%
1 5.0'
2 10.0'
3 15.0'
15.0'
None Observed
None Observed
Type of
Sample
G
G
G
Dry
Strength
Group Unified
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet I.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see'Sheet 3.'
Test Hole #13 Table A
tIatch
Depth in Feet
From To
0.0' - 0.5'
0.5' - 1.0'
1.0' - 6.0'
6.0' - 12.0'
12.0' - 15.5'
WO I[A18703
Logged By: O.H.
Date: 10-31-78
Soil Description
Brown Peat (Pt), damp, soft.
F-4, brown Sandy Silt (ML), damp, soft to
stiff, NP.
F-4, brown Gravell~ very Sand~ Silt (ML),
damp, stiff, NP.
F~2 to F-3, brown very Silty Gravelly Sand
(SM), poorly graded, all sand sizes, damp,
medium density, subroun'ded particles to 2".
NFS to F-2, brown'slightly Silty ~ndy Gravel
(GP-GM), poorly graded, all sand szzes, damp,
medium density, subrounded particles to 2";
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth M%
5.0' 10.0
10.0' 9.1
15.0' 6.4
15.5'
None Observed
None Observed
Type of Dry
Sample Strength
G L-N
G L
G N
Group Unified
F ML
E SM
B SM
Re, harks: I.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
GroUp refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification,'see Sheet 3.
Test Hole ~14
Table A
NO #A18703
Logged By: O.M. Hatch
Date; 11-1-78
Depth in Feet
From To
0.0' 2.0'
2.0' - 4.5'
4.5' - 7.0'
7.0' - 12.0'
12.0' - 15.0'
Soil Description
Brown Peat (Pt), damp to wet, soft.
F-4, brown Sandy ~ilt (ML), wet to saturated,
soft.
F-2, brown very Silty Gravelly Sand (SM),
poorly graded, all sand sizes, wet to saturated,
medium density..
F-4~ brown' Sandy Silt (ML), damp, stiff, NP.
F-2 to F-3, brown very Silty Gravelly ~and
(SM), poorly graded, all sand sizes, damp,
medium density, subrounded particles to 2"
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth.
1 5.0'
2 10.0'
3 15.0'
15.0'
None Observed
2.0'
Type of
M% Sampl~
18.5 G
18.8 G
12.1 G
Dry
Strength Group Unified
L -M E SM
M E SM
M E SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
G[oup refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test IIole #15
Depth in Feet
From To
0.0' 1.5'
1.5' - 11.0'
11.0' - 15.0'
Table A
WO #A18703
Logged By: O.M.
Date: 11-1-78
Soil Description
Brown Peat (Pt), damp, soft.
F-4, brown Sandy Silt (ML), trace gravel,
damp, stiff, NP. Contains slightly silty
graavelly sand layer (SP-SM) at 8'
F-2, brown Silty Gravell~ Sand (SM), poorly
graded, all sa~d sizes, saturated, medium
density, subrounded particles to 3".
Hatch
Bottom of Test Hole:
Frost Line:
Free Water Level:
15.0'
None Observed
11.0'
Type of Dry
S~ample Depth M% Sample '~trength ~roup Unified
I 5.0' 15.8 G N F ML
2 10.0' 14.2 G L-M F ML
3 15.0' 9.9 G M E SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = Undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification, see Sheet 3.
Test IIole ~16
Depth in Feet
From To
0.0' - 1.5'
1.5' - 3.0'
3.0' - 5.0'
5.0' - 15.0'
Table A
W0 ~A18703
Logged By- O.M.
Date: 11-1-78
Soil Description
Brown Peat (Pt), damP, soft.
F-4, brown Sandy Silt (ML), damp, soft.
F-l, brown ~ilty ~andy Gravel (GM), poorly
graded, all sand sizes, damp, medium density,
subrounded particles to 3".
NFS to F-2, brown Sand (SP-SM), trace silt,
poorly graded, fine and medium grained,
damp, medium density.
Hatch
Bottom of Test Hole:
Frost Line:
Free Water Level:
Sample Depth M%
1 5.0' 9.6
2 10.0' 6.4
3 15.0' 14.7
15.0'
None Observed
None Observed
Type of Dry
Sample. Strength
G
G
G
Group. Unified
B SM
C SP-SM
C SP-SM
Remarks: 1.
3.
4.
5.
6.
Type of Sample, G=Grab, SP = Standard Penetration,
U = undisturbed.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
General Information, see Sheet 1.
Frost and Textural Classification, see Sheet 2.
Unified Classification) see Sheet 3.
g ~
g ~