HomeMy WebLinkAboutPROSPECT HEIGHTS #5 S-5710
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION
ENVIRONMENTAL HEALTH CASE REVIEW WORK SHEET
PLATTING BOARD E~] PLANNING & ZONING
CASE NUMBER
S-5710
DATE RECEIVED
April 29,
1981
COMMENT TO PLANNING BY
May 14, 1981
NAME
Prospect Heights
FOR MEETING OF CASE OF
Subd ivisio~ J~-~
[] PUBLIC WATER NOT AVAILABLE TO PETITION AREA
[] PUBLIC SEWER NOT AVAILABLE TO PETITION AREA
REVIEWER'S COMMENTS:
71-014 (Rev. 2/78)
ENGINEERING
· AND TESTING
John M. L~ambe P.E.
4101 Arctic Boulevard · Suite 205 · Anchorage, Alaska 99503
907-276~4113
April 27, 1981
Besse, Epps & Ports
2220 E. 88th Avenue
Anchorage, Alaska 99507
Attention: Dave Grenier /
Subject: Soils Investigation - Tracts B & C, Prospect Heights Subdivisio~ #1.
Dear Mr. Grenier, ~
This letter presents the results of the soils investigation that we performed
on Tracts B & C, Prospect Heights Subdivision. This work was performed in accor-
dance with our proposal dated April 14, 1981.
'In response to your request, eight borings were performed on the subject prop-
erty. The borings were drilled by'Denali Drilling, Inc. with a Nodwell mounted,
Mobile B-50 drill fitted with 6" O.D'. continuous flight auger. The borings were
located by reference to the preliminary topographic information and the stakes on
the proposed property corners that you provided. As directed, the borings were
located where access allowed without damage tosignificant trees. The approximate
locations of the borings are shown on the Boring Locati~on Sketch attached as Plate
1. The borings were logged by Mr. Roy McDonald, technician of. our staff.'
Samples were taken in each boring at intervals'of five feet by removing the
auger from the boring then removing the sample from the flights of the auger
from near the bit. The samples were sealed in plastic bags and transported to
our laboratory where the moisture content of each sample was determined. The
samples were visually classified by a laboratory technician, then sorted into
groups according to similarities in color and texture. Each gnoup was. assigned
an arbitrary letter designation. Selected samples of the group were analyzed
for particle size distribution. The distribution of the samples within the
groups and th6 schedule of particle size analyses are as follows:
GROUP BORING
A I
~uesse, Lpps & Ports
Tracts B&C, P~ospect Hts.
TRACTS B & C
PROSPECT HEIGHTS SUBD.'#1'
DEPTH
CLASSIFICATION
3,0I
5.0'
15.0'
20.0'
2 3.0'
2 5.0'
2 7.5'*
2 10.0~
2 15.0'
2 20.0'
3
3
3
3
3
3
2.5'
5.0'
7.5'
10.0'
12.5'*
15.0'
20.0'
5
5
5
6
6
6
5eOI - .
7.5'
5.0'
10.0'
15.0'
6 20.0'
[~ .- 5 20.0'
10.0' '. ' .
7.5' ' '
15.0' - ' "-
20.0'
SILTY SANDY GRAVEL, GM
SILTY GRAVELLY SAND, SM
(48.5% Gravel)
SILTY GRAVELLY SAND, SM
(44.6% Gravel)
SILTY ·SAND, SM
Groups Continued.,,
GRouP · BORING
Besse, £pps & Ports
Tracts B&C, Prospect Hts.
DEPTH
10.0'
15.0'
CLASSIFICATION
6 . 7.5'
7 5.0'
7 7.5'
7 10.0'*
7 20.0'
SILTY GRAVELLY SAND,SM
8 2.5'*
8 5.0'*
D 6 2.5'
* Particle size An
alyses Performed.
SILTY GRAVELLY SAND, SM
SILTY GRAVELLY SAND, SM
ORGANIC SANDY SILT, OL
- '- ' :'" .... Besse, £pps & Ports
Tracts B&C, Prospect Hts.
The field logs were modified by the laboratory analyses. :'Th~ fiights of the
auger used by Denali Drilling, [nc. were worn smaller than the bit.of the auger.
This, coupled with'the method of sampling, may not have returned all of the
coarse fractions of the soil matrix to the surface for sampling and analysJs.
6onsequently, the interpretation of the lab and field data is biased toward the
field observations with regard to gravel content. Due to the glacial origin of
the soils, cobbles and boulders can be expected to occur frequently throughout
the area. The logs of the borings are,presented on Plates 2 through 9. The
results of the particle size analyses are presented on Plates 10 through 16.
All field and laboratory classification were performed according to the Textural
Classification System presented on Plate 17 and the Unified Soils Classification
System presented on Plate 18.
In addition to logging and analyses of the soil types enco'untered"in our ex-
ploration, percolation testing was performed adjacent to each boring..The per-
colation test procedure was to drill a shallow percolation test hole to the
desired depth'apProximately five to ten feet away from the test boring, placing
gravel in-the bottom Of the percolation hole then placing, four inch perforated
pipe ih the hole. Gravel was then placed around the perforated pipe and the pipe
was filled with water. The soils were allowed to saturate overnight. Mr~ Mark
Hall of our staff monitored the drop in the water level within the percolation
hole over a period, of one to four hours on the following .day. Wate~ was added
~o'the percolation test as required to try.to maintain six inches.of water over
the gravel in the'bottom of the percolation hole~ ~The results of M~. Hall's
percolation testing are .attached as Plat'es 19 and 20.
All borings were left open. When Mr. Mark Hall viewed each boring subsequent
.to dril'ling~ observations to the'depth of the free water level,~-if any, were re-
.. corded.-'These, data are presented'on the boring logs and on the'fiel'd'percolation
.'. test.~results,: presented. . .°n Plates 19~ .. . and 20~ The-wording~ no free Water..observed
.above 14 5"i! means' that the boring sloughe~ below 14'5' and the'holeap'~ea~e~'dry.
'i' It should be noted however, that the free water l'eVel may'flQclba~e S~asonally'and
annually in~'response to.seasonal run-off or heavy rainfall:'r The data presented
on. our logs is only intended to represent to level of the free'water observed in '
the borings at the time of the observations. ~ ~. · . ·
~Page 5
Jesse, Epps & Potts
Tracts B&C, Prospect Hts.
No free water was observed in the borings during or after drilling, however,
as noted before, often the borings sloughed immediately after drilling. The
free water in Boring 5 was assumed due to difference in drilling and observations
of the cuttings during drilling.
The percolation rates, presented on Plates 19 and 20, are generally good. In
Some instances, the percolatio'n test accepted water as fast or faster than it
could be packed in and the test went dry. These tests are just denoted as having
a "good" percolation rate. The percolation rate in Test 4 was the slowest, 160
minutes per inch. This agrees with the boring log and laboratory analyses in-
dicating more silty soils.
This repor~ is intended to be a preliminary transmittal of the field observa-
tions and soils analyses that were performed on the subject propertY. The scope
'of this effort was determined by discussing the project with Mr. David Grenier
of Besse, Epps and Potts and. Mr. Les Buchholz. of the Department of Health and
Environmental Protection (DHEP). As we discussed, the purpose'of this investi-
gation was to provide preliminary data With which to assess the suitability-of
the property for subdivision and the development of On-site sewer systems and
to define areas where'additional analyses may be required..To this end, rigorous
field percolation testing was performed, i.'We trust the foregoing is sufficient
to your immediate needsl While qntended to be comprehensive, it may not be ex-
haustive of-the possibilities. If questions arise or if we can be 6f further
service, please feel free to call.
Very Truly- Yours,
John M. Lambe, P.E.
Civil Engineer 4254-E
TEST HOLE.LOCATION DIAGRAM
PROSPECT HEIGHTS SUBDIVISION
TRACTS' BS~ C
TEST HOLES NOT LOCATED
BY ,sURVEY' M'ETHODS
ZERMATT AVE.
T,H.7
TR. C'
T. H6
'r.H. 5
/
/I T.H. 2
TR. B
T.H. 8
./&c ?~/
PLATE
1
Laboratory Tes~
Percolation Test A 5.9
4.0-4.5'
A 3.7
C '9.1
C 9.0
A 6.8
A .4.7
JOHN'M. LAh BE, P.E.'
JobNo. 81-310.01 Appr:.WEP Date_4/27/81
LOG .OF BORING I
Equ[pmentMobile B-50, 6" AUGER.
Elevat;onExistinq Grnd. Date
PEAT, PT
Brown SILTY SANDY GRAVEL, GM
moist
Brown SILTY GRAVELLY SAND, SM
moist
Brown SILTY SANDY GRAVEL,-GM
moist, w/random cobbles
TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
sloughed below 9.1'
LOG OF BORING 1
BESSE, EPPS & POTTS
TRACTS B &.C, PROSPECT' HTS. SUBD.
~NCHORAGE',
PLATE
2
~ ~ LOG .OF BORING 2
~: ~ ~' '-' ~ Eau~r~ment
~ ~ ~ ~=-&-~ -r Hobile B-50, 6" AUGER
o :~c ~E
r,,-' 0
Laboratory Te~t~ c~ u ~ ~ ElevatlOnExistinq Grnd. Date 4/20/81
0'-
~ ~ Seasonal Frost to 0.9'
~ Brown PEAT, PT
A 7.8 ~ i.J
A 6.4 5-_~ t
Perc. Test @ 6.0'
Sieve Analysis A 4.5 't~ Brown SILTY SANDY GRAVEL, GM
14.9% -#200 ~ : moist w/random co6bles .
A 4.8 IO-
A 4.6 · 20-~ J'~ TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
~ sloughed below 10.5'
2_5-
30-
40~
LOG OF BORING 2 PLATE
, · JOHN M. LAMBE, P.E.
BESSE, EPPS & POTTS
JobNo. 81-310.01 _Appr] WEP Dine. 4/27/81 TRACTS B & C, PROSPECT HTS. SUBD.
Laboratory Tes~
Percolation Test
4.7 -5.3'
A 5.7
A 6.5
A 4.4
LOG .OF BORING 3
_= ~ Equipment Mobile B-50, 6" AUGER
, ~ ~ EJevaHonExisting Grnd. Date 4/20/81
0-[ JlJ~JlJlJSeasonal Frost to 0.5'
/
I"l'T'~-[Brown ORGANIC SILT
Brown SILTY SANDY GRAVEL, GM
moist w/random cobbles
A 5.9 10-
A 4.1
Sieve Analysis A 4.0
20.7% -#200
15_
A 4.4
20
TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
Sloughed below 13.0
JOHN LA/ I E, RE.
Job No. 81-310.01 ApPr:.IgEP Date 4/27/81
LOG OF BORING3
BESSE, EPPS & POTTS
TRACTS B & C, P~0SPECT HTS. SUBD.
ANCHORAGE, ALASKA
PLATE
4
Laboratory Tests
Sieve Analysis
26.5% -#200
A 25.2
Percolation Test C 23.7
4.0-5.0'
C 10.2
Sieve Analysis
42.8% -#200
B 9.4
C 11.3
C 7.3.
NO.
JOHN M. LAMBE, P.E.
81-310.01 Appr: WEP Date4/27/81
LOG .OF BORING 4
Equipment Mobile B-50, 6" AUGER
ElevatlonExistinq Grnd. Date 4/20/81
m
__Brown PEAT, PT
Brown SILTY SANDY GRAVEL, ~M
wet w/random fiberous organics
Brown SILTY GRAVELLY SAND, SM
wet w/random fiberous organics
10-
15_
Brown SILTY SAND, SM
moist w/random gravels
Brown SILTY GRAVELLY SAND, SM
moist w/random cobbles
TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
sloughed below 14.0'
LOG OF BORING 4
BESSE, EPPS & POTTS
TRACTS B & C, PROSPECT HTS. SUBD.
~NCHORAGE. ~a~a
PLATE
LoborotorY Tests
Percolation Test @ 4.0'
A 12.8
A 4.4
A 3.3
C 9.2'
C 3.8
B 11.5
, , JOHN M. LAMBE, P.E.
Jc~oNo. 81-310.01 Ap~: WEP Date. 4/27/81
.OO .OF BORING 5
Equ;pment Mobile B-50, 6" AUGER
Elev°r~°nExistinq Grnd. Dare 4/20/81
Brown PEAT, PT
saturated
Brown SILTY SANDY GRAVEL, GM
moist to wet
IO-
Brown SILTY GRAVELLY SAND, SM
moist w/random cobbles
Free Water 'Assumed @ 17.5"
Brown SILTY SAND~ SM
moist w/random gravels
TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
Sloughed below 13.0'
LOG OF BORING 5
BESSE, EPPS & POTTS
TRACTS B & 'C, PROSPECT HTS. SUBD.
NCHORAGE, ALAS~
PLATE
6
Laboratory Tests
Percolation Test
4.3 - 4.8'
D 32.5
A 9.4
LOG .OF BORING 6
Equipment Mobile B-50. 6" AUGER
ElevatlonExisting Grnd. Date 4/21/81
Seasonal Frost to 1.0"
Brown SANDY ORGANIC SILT, OL
moist
C 8.8
A 7.1 I0-
SILTY SANDY GRAVEL, GM
moist w/random cobbles.
A '8.6
A 4.1'
'OTAL DEPTH OF BORING - 20.0'
No free water observed, boring
sloughed below 14.0'
JOHN M. LAMBE, P.E.
Jc/oi",k). 81-310.01 Appr: WEP Date
4/27/81
LOG OF BORING 6 '
BESSE, EPPS & POTTS
TRACTS B & C, PROSPECT HTS. SUBD.
ANC'HORAGE, AIAq~A
PLATE
7
Laboratory Tests
LOG .OF BORING 7
Equ[pmentlqobile B-50~ 6" AUGER
ElevaH°nExistinq Grnd. Dote 4/21/81
Percolation'Test
4.8-5.3'
B 15.3
C 9.7.
C 8.6
Sieve Analysis C 9.7
36.5% -#200
A 4.4
C 6.7 .
~
20
Brown SILTY SAND, SM
wet w/random gravel
t6 0.5'
Brown SILTY GRAVELLY SAND, SM
moist
Brown SILTY SANDY GRAVEL, GM
:moist w/random cobbles
Brown SILTY GRAVELLY SAND, SM
moist
TOTAL DEPTH OF BORING - 20.0'
No free water observed, boring
sloughed below 12.5'
JOHN M. LAMBE, P.E.
JobNo. 81-310.01 Appr:WEP Date 4/27/81
LOG OF BORING 7
BESSE, EPPS & POTTS
TRACTS B & C,.PROSPECT HTS. SUBD.
~NCHORAGE, ALASKA
PLATE
8
Laboratory Tests
Sieve Analysis
35.2% -#2O0
Percolation Test
3.8 - 4.9'
Sieve Analysis
25.9% -#200
C 9.8
C' 6.6
A 7.6
LOG .OF BORING 8
_=~ Equipment Mobile B-50, 6" Auger
r~ ~ ElevatbnExisting Grnd. Date 4/21/81
I,t,/,t,lBrown ORGANIC SILT, 0L
wet
Brown SILTY GRAVELLY SAND, SM
moist
A 5.2 10-
Brown SILTY SANDY GRAVEL, GM
moist w/random cobbles
A ' 5 . 0m.
DEPTH OF BORING - 20.0'
No free water observed, boring
sloughed below 14.0'
JOHN &t. LAMBE, P.E.
LOG OF BORING 8
BESSE, EPPS & POTTS
TRACTS B & C, PROSPECT HTS. SUBD.
ANCHORAGE, ALASKA
PLATE
9
JobNo. 81~310.01 Appr: WEP Date. 4/27/81
U-S-SfandardSieveOpeningSize J ' U.S. Standard Sieve Numbers 'H drometet
11111111 II1~1tl !1111111 · IIIII/// I111.1111
~ol111.1/// 'llll~,ll It111111' IIIIIIII III1'1
~ ~1111// I'11111~ . IIIIIIII IIIIIIII '
~ 1/111/// IIIIIII I~-~11111111 i1111//I~ IIIIIII1
~ r. ' ~1 IIIIII ' IIIII
I1111 ' IIIII. '11111 I i'.~ IIIIII IIII
_ 11111 IIIIII /111 -IIHII/ '11111-/
o11111/// IIIIIl//~ IIIIII/I IIIIIII/. IIII/////
I00 ~0 fO 5 GRAIN ~IZE INO'MSILLIMETER$OI 005 C~OI 0.005 0001
Symbol* · Somple Source Clossification
· BORING 3, Sample #5 @ 12.5' SILTY GRAVELLY SAND, SM
j ·
JOHN U. LAUI]F P.£. .PARTmLE $~Z~' AN~LYS~S PLA TE
BESSE, EPPS & POTTS
TRACTS B &.C, PROSPECT HTS. SUBD. 10
JobNo. 81-310.01 ApI:"':~EP Date 4/27/81_ ANCHORAGE, ALASKA
U' S' Slandard Sieve OP enin9 Size I' U.S. Standc~rd Sieve
Ifil/l/I/ IIIlll ~ Illlll// IIllll//' IIlll
Jill/I/I/ IIIII/ ~ IIIIII// IIIIII// IIIIII
llllll/// Illll/, ~[/// Illllll./ Illlll
'~JIIlll/// IIIIIId IIIIII ~1111'111/ 'llllll
~1111//t IIII11 ] IIII/ IIII/./
. ~1111/// IIIIIII 11111 Itl IIIit/
.~1111/// IIIIIIt IIIII III · IIIIII
~MEDIUM ~ SILT OR CLAY
Symbol :'Somple Source Clossificolion
' BORING 8, Sample ~2 ~ 5.0' SILTY GRAVELLY SAND, SM
JOHN ~. [A~E P.~. . PARTICLE.SIZE ANALYSIS PLA TE
BESSE, EPPS & POTTS
~,~c~ ~ ~ c. ~,o~c~ ,~. ~. 11
~No._. 81-3i0.01 Ap~: WEP Date. 4/27/81 ANCHORAGE, ' ALAS~
U.S. Standard Sieve Openm9 Size U.S.Standard Sieve Numbers *Hydrometer
,,,',~'3 2 g'~,,~ ~ ',~ 'e~o ~e ~o~o ~o~ ~' ~
~I~11~1'1"~'~1111~1 I' ,'11'1111'11 '11~'11'111 IIIIlll
"" 1111 IIIII '"""'
HIIIt l l I II1~11 Illlltl / III
~o111111111 I~11111 I ~111~111 IIIIIIII
.~ IIIIIIIII IIIIl/// ~111 IIIII/// IIIIIII
~,oHllllll I- IIIIIIII · Illll~ i11,11111 IIIIIll
~ llllllll/ IIIIII// -. IIIIII1-~, IIIII/// IIIIII/
~,oHlllll l I It111111 IIt1111'/~11111//t IIIIII/
~ IIIIIIIII II111111 Iit11111 ~1111' IIIII
""11111 lllllltl '"""" '"""' ""/1
""11 11 """"""""
~ ' GRAIN SIZEIN MILLIMETERSOI 005 001~ 0.005 ~1
SAND
GRAVEL ICOARS~ MEDIUM J FINE
Symbol , Sample Source Classification
' BORING 8, S.amp]e ~1 ~ 2.5' S~LTY GRAVELLY SAND,
JOH~ U. LAU~E P.E. .,P~RT~CLE SiZE A~ALYS~S Pg*T~
TRACTS B. & C, PROSPECT HTS. SUBD.
~.. 81-310.01 Appr:NEP Date. 4/27/81 ANCHORAGE, ALAS~
11 $.Slandard Sieve Opening Size I U S Standard Sieve Numbers I 'Hydromelet
11111//// 'IIII-IIN I IIIIIII/ IIIIII// I1'111
~o11111//// IIIIIII I~1. IIIIIII/ IIIIII// IIIIII/
IIIIIt/// IIit1111 ~1111/1// IIIII/// IIII11 /
~o11111//// IIIII/1/ I ~111// IIIIIIII IIIIII/
~ 11111t/// IIIII/// I II1~1/ IIIII/// IIIIII/
~1111//./ IIIII/// / IIII1~ IIIIIl// IIIIII/
~ 111111/// . III1.1l/// .'1111111 I~ .~~ IIIIII/
,,,,,,,,
FINE SILT. OR CLAY
Symbol: Sample Source Classification
BORING 7~ Sample ~4 ~ 10.0' S~LTY GRAVELLY SA~D, SH
JOHN M. LAMBE P.E. .PARTICLE SiZE A~ALYSlS PLATE
,~s~, ~ ~ ~o~ 13
TRACTS B & C, PROSPECT HTS. SUBD.
~.. 81-310.01 ~:~EP Date 4/27/81
ANCHORAGE, ALAS~
I1 S. Standard Sieve Opening Size I ' U.S.Standard Sieve Numbers I ~Hydrometer
.111111/t/ IIIII/// IIIIIIN iiiiiJ] IIIIIII1
~ ilt11//// IIIII/// IIIIIII ~ iiiiiil IIIIIIII
~ IIIIIi1.1
,,,,,,,,
111111111 IIIIIII/ ,1111111'/ IIIII// IIIII1[
,,,,,,,,, ,,,,,,,, ,,,,,,,, ,,,,,,, ,,,,
,,,,,,,, """"" '"""'" """// "
.. ,,,,,,,, ,,,,,,,, ,,,,,,, ,,,,
Jllll//// IIIII/// IIIIII// IIIII// IIIII
FIN~ SILT O~ CLAY
BESSE, EPPS & POTTS
TRACTS B & C, PROSPECT HTS. 'SUBD. 14
~No. 81-310.01 Ap~:. WEP Date 4/27/81 ~NCHORAGE
U.S. SlandardSieve Opening Size , j, U.S. Standard SieYS Numbers J 'Hydrornetet_
~ llll'lllll I iiJlilll'~lll I// ~ IIIIlll'/ IIIIIII
IIIIII IIIII
Symbol · Sample Source Classification
BOEING ;,' Sample ~[ ~ 2.5' SILTY GRRV[LLY. SA~D, SH
JOHN M. LAMBE P.E. ' .PART;CL[ S~Z[ ANALYS~S PLA;E
TEACTS B & C, PROSP[CT HTS.
~.. 81-310.01 Appr: WEP Date 4/27/81 ANCHORAGE, ALASKA
. U-S. Stond. o. rd$[eveO.pening_$iz. J ' ;U.S.$tondordSieyeNumber$
I I i i I I I I I I
- Hlll'lllt I~ III1[111 IIlllll lllllll Illll}
~111111 I ~lllllll l I1~1111 IIIIIII ' IIIIII
~ ~1111.111 I IIIlllll ~llltlll '
WIll Illlll- Ill~ 'llllll Ifil ]
· 11111////-/- IIIII/// IIII/// ' IIIIIII IIII
~11111///// IIIII///-' IIII/// · IIIIIII IIIIIIII
I00 ~ [0 5 , I 0,5 QI ~05 ~01 0.005 Q~,
. , . ~ GRAIN SIZE IN ~ILLIMETERS .
Symbol Sample Source Clossificollon ·
mple ~3 ~ ' ' '
' BORING 2, Sa ' SZLTY GRAVELLY SAND,
JOHN~. LAMBE P.E. .,PARTICLE SIZE ANALYSIS PLATE
BESSE, EPPS & POTTS.
~No. 81-310.01 Appr?EP Date 4/27/81 TRACTS B & 'C, PROSPECT HTS. SUBD. 16
.......................... A~CHO~A~
ENGINEERING
ANDTESTING
John M. Lambo, P.E.
4101Arctic Boulevard · ull 5 · c
· SOIL ~L ~ ~;l{j I Ff~ ~l~lasl~ ~,~1'
OR
907-276-4113
CLAY
\ \,
31LTY
.\
\
'GRAVELLY \
\ // \
SAN DY. -\ L";
0 I0 20 50 40 50 60 70
................................. GRAVEL (+~4SCREEN) % BY WEIGHT
CORPS OF ENGINEERS FROST DF. SI ON SOIL CLASSIFICATION
.AND USCS EQUIVALENT GROUPING'
80 90 I00
TYPICAL SOIL TYPE~
FI
F4
0.02 MM,
Gravelly soils 3 Io 10 GW, GP. GW-GM, GP-GM
(a) Gravclly soils 10 Io 20 GM. GW-GM. GP-GM
(b) Sands 3 lo 15 SW, SP, SM, SW-SM, SP-SM
(~') GraVclly'so~s ~20 GM. GC
sl]ly sands
(c) Clays. Pi > 12 -- CL, CH
(a) All silts -- ML, MH
(b) Very fine s~ty sands
(c) Clays, PI ~ 12 -- CL, CL-ML
(d) Varied clay% and -- CL
other 6~c-l:ra]ne_d, C~ ~.,'r . :,-~ ~.
17
JOHN
MAJOR DM,~ON $ J TYPICAL NAMEs
WITH LITTLI
G'AVIrL~ NO,IN,, GP t~.'~:'~:?t' 'OC~tLYO/~AOEDGRAV,L$, OILAVEL.~AN0
CO*~,! ~LACTIO~ ~u Jll~ J llL,Y O~AVEL$, POORLY G&AD~D O~AVIL. ~AND.
SAN 0 $ NO FINE, $~ e., ~LY O~O ~Nffi, ~VELLY ~N~
IN~GANIC SlL~ AND VErY FI~ ~N~. ~O~ --
I [ ~J~ C~Y SIL~ WITH 5LIGHT
SILTI AND CLAY~ ~/~ IN~OANIC C~ OF L~
SILTS AND CLAYS
OH ~NIC C~ ~ ~DJ~ TO HIOH
HIGHLY OHGANIC S01L~' Pt ~%ANDO~HIGHLy~NIC$~
UNIFIED SOIL CLASSIFICATION SYSTEM
Can,el m Con,olldotlon
LL ~ Llqvld Limit (In %)
PL ~ Pie,tlc Limit (In %)
*Tx 320 (2600~
TxCU 320 (2600)
05 2750 (2000)
FV$ 470
'UC 2000
LV$ 700*
(1) Al ~t~ea~tk te,t~ on 2.1" er 2.4" dlemet.~ ,wmple,
(2) * Indicate, 1.4" diameter ,emple.
/
KEY TO TEST DATA
M LAMBE P.E.J.: O L CLASSIFI(~ATION CHART.
IAND
KEY TO TE~iT DATA
Appr: Date
PLATE
18
TRACTS B & C, PROSPECT HEIGHTS
PERCOLATION TEST RESULTS
BORING
DATE
TIME DEPTH TO
WATER
COMrdENTS.
4/23/81
8:40 52-1/4" Dry
10:12 42-3/8"
10:41 52¼" Dry
· 10:42 21¼"
11:12 49½"
11:42 52¼" Dry
No Free Water Observed Abov~ 9'1"
Test at 4.0 to 4.5'
Added 40-7/8" Water
'Added Water
Percolation Rate - Good
4/23/81 2:57 55½"
3:27 72½" Dry
4:27 33¼" Added 39¼" Water
4:57 60½"
5:27 72½"'Dry
No Free Water Observed Above 10'6" 'Percolation Rate - Good
Test at 6'
4/23/81 2:52
3:22
3:52
4:52
5.:22
5:52
6:22
6:52
No Free Water Observed Above 13'
Test at 4'8½" to 5'3-3/4"
47-3/8" Dr~ ·
48"
48-7/8"
50"
50-3/4"
51½"
52½"
53½"
Percolation Rate-30 minutes/inch
Added 13-3/8" Water
5
4/23/81 2:45
3:15
3:45
4:45
5:15
5:45
6:15
' 6:45
No Free Water Observed
Test At 4 to 5'
4/23/81 9~55
10:19
10:21
10:55
11:19
No Free Hater Observed Above 11'2"
Test at 4'
41" Dry
41¼"
41¼"
41½"
41-5/8"
Adde~)15¼~Water
42"
42-1/8" .~ ~-- - ~'
14 5 Percolation ~t~160 minutes/inch
36¼" Dry ~d~d~d~Wate~--~'
50½" Dry
19"
50½" Dry '
Percolation Rate - Good
PLATE
19
BORING
8
DATE
4/23/81
TRACTS B & C, PROSPECT HEIGHTS
PERCOLATION TEST RESULTS
TIME
DEPTH TO
WATER
COMMENTS
9:34
9:59
10:29
10:59
11:29
11:59
12:29
12:57
12:59
1:29
1:59
65" Dry
53½"
55-3/4"
57¼"
58-3/4"
59½"
60"
60¼"
58"
58¼"
58½"
Added 11½" Water
Water Added
No Free Water Observed Above 13'9
Test at 4'3" to 4'9"
4/23/81
10:03
10:33
11:03
11:33
12:03
12:33
1:03
1:33
2:03
" Percolation Rat~ - 120 minutes/inch
50" Dry
51½"
52½'
54"
56-3/4"
59-1/8"
60½"
61¼"
62"
Added 18½" Water
No Free Water Observed Above 12'5"
Test at'4'9¼" to 5'4"
4/23/81 10:07 45-3/4!' Dry
10:37 47"
11:07 48"
11:37 49"
12:07 49-3/4'~
12:37 50¼"
1:07 50-3/4"
1:37 51-1/8"
2:07 51-5/8"
No Free Water Observed Above 13'
Test at 3'9-5/8" to 4'10½"
Percolation Rate - 40 minutes/inch
Water Added
Percolation Rate 60 minutes/inch
PLATE
20
~ MUNICIPALITY OF ANCHORAGE
~ · ~ DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION
ENVIRONMENTAL HEALTH CASE REVIEW WORK SHEET
[]] PLATTING BOARD []] PLANNING & ZONING
CASE NUMBER NAME
S-5710 Propsec~ Heights Subdivision #5
DATE RECEIVED
July 1, 1981
COMMENT TO PLANNING BY
July 21, 1981
FOR MEETING OF CASE OF
)
[~] PUBLIOWATERNOTAVAILABLETOPETITIONAREA/L.~t~.,.:.,.'? ~ / ' ':,.."'.
[] PUBLICS~/~ERNOTAVAILABLETOPETITIONAREA/ [ ~, ''
REVIEWER'S C~MMI NFS'~(I '
71-014 (Rev. 2/78)
SOIL AND MATERIALS
ENGINEERING
AND TESTING
John M. Lambe, P.E.
July 9, 1981
Besse Epps & Potts
2220 E. 88th Ave
Anchora9e, Alaska
Attention: Hr. Dave Grenier
4101 Arctic Boulevard * Suite 205 * Anchorage, Alaska 99503
907-276-4113
Subject: Prospect Heights Subd #5
Case No. 5710
Gentlemep,
In response to your request, we drilled six additional borings numbered
9 through 14 on Tracts B and C, Prospect Heights Subdivision to supplement
the eight borings we drilled in late April. The purpose of the additional
exploration was to supplement the data with regard to the percolation
rates of the soil. To this end, we drilled one deep boring (generally
20' in depth) at each test location to observe soil stratification and
depth to free water. One and one-half inch I. D. slotted pipe was placed
in the deep boring to allow observation of the seasonal free water level.
Adjacent tO each deep boring, a shallow percolation test hole was drilled
with 6" O.D. continous flight auger. Gravel was placed in the bottom of
the percolation hole. Four inch perforated pipe was placed on the gravel.
The annular space around the pipe in the boring was filled with gravel.
Water was placed in each percolation test the evening prior to testing.
The results of the tests are presented on the attached sheets. The locations
of the tests are presented on Plate 1 from our report dated April 27, 1981
revised to show the additional borings.
We trust the foregoing is sufficient to your needs. Please call if
we can be of further service or if you have any questions. As requested,
one copy of this letter was transmitted directly to the DHEP.
TEST HOLE-LOCATION DIAGRAM
PROSPECT HEIGHTS SUBDIVISION
TRACTS as~ C
TEST HOLES NOT LOCATED
BY SURVEY METHODS
ZERMATT AVE.
T.H. I~ "--~8
'r.H? H.I
· T.H. 2
TR, C
T.H. 9
T.H. 5
TR. B
T.H. T.H. II
T.H. 4
TH. I0 ~
-N
PLATE
1
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG-- PERCOLATION TEST
~ SOILS LOG
PERCOLATION
TEST
7
8
9
10
12
13
14
15
16
17
18
19~
20-
COMMENTS
~'~V~wAS GROUND WATER . / ' S
ENCOUNTERED? ~' L
IF YES, AT WHAT i - E
DEPTH? J ~ ~l ~
SLOPE SITE PLAN
PERFORMED BY: L~ML~
Reading Date Gross Net Depth to Net
Time Time Water ~ Drop
~0~ ~ 0 ~,~ o, ~ ~
PERCOLATIoyTE / ,..~__ ) (minutes/inch)
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L, Street, Anchorage, Alaska 99501 264-4720
SOILS LOG- PERCOLATION TEST
SOILS LOG
PERCOLATION
TEST
PERFORMED FOR: "~'~_..'~,~ ~__.
LEGAL D E SCR I PTI O N :'~::;~ t~'~*-T-
1
DATE PERPORMEO:
SLOPE SITE PLAN
7
8
9
10
-11
12
13
14
15
16
17
18
19
20¸
ENCOUNTERED? O
P
~F ~ES, AT WRAT , E
DEPT,.~ t '7
Reading Date Gross Net Depth to Net
Time Time Water Drop
7/z/~ I I,' I~, .~o ~--'~4.
4~ ~ ~o ,~,~'/~z,~ ~,s1 ~
~ I~ 30 x~,77 o,~7
DATE:
PERCOLATION RATE ~. M (minutes/inch)
TEST RUN BETWEEN ~"~"=~FT AND ' -7 FT
CERTIFIED BY:
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 2644720
SOILS LOG -- PERCOLATION TEST
SOILS LOG
PERCOLATION
TEST
3
4
5
6
7
8
9
10
11
12
13
SLOPE SITE PLAN
wAS GROUND WATER S
ENCOUNTERED? ~,,I ~ OL
P
E
IF YES, AT WHAT
DEPTH?
14
15
16
17
18
19,
20
Reading Date Gross Net Depth to Net
Time Time Water Drop
/' ~
PERCOLATION RATE ~ ~ (minutes/inch)
TEST RUNBE~EEN ~ FTAND I O FT
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG - PERCOLATION TEST
SOILS LOG
PERCOLATION
TEST
1
2
3
4
5
6
7
9
10
SLOPE SITE PLAN
11
12
13
14
15
16
17
18
19
2O
COMMENTS
WAS GROUND WATER
ENCOUNTERED?
IF YES, AT WHAT
DEPTH?
Reading Date Gross Net Depth to Net
Time Time Water Drop
~o~/~ 7 ~o ~/~ 7~
PERCOLATION RATE f 4 "~ ~ ~ 4,.=.~ (minutes/inch)
TEST RUN BETWEEN AND FT
CERTIFIED BY:
/
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG- PERCOLATION TEST
SOILS LOG
Id
PERCOLATION
TEST
LEGAL D ESCR I pti 0 N:~~~L~L~ _z~-..~
~ -~'r= SLOPE
8
9
10
11
12
13
14
15
16.
17
18
19-
20
DATE PER EORMED=. / / I-
~-~__~__'t'-.t.o -5'-'7 I0
SiTE PLAN
L
O
P
E
}~ ~ I WAS GROUND WATER
,~~-~ ~ DEPTH?
COMMENTS
Reading Date Gross Net Depth to Net
Time Time Water Drop
PERCOLATION RATE_I ~r- ~ (minutes/inch)'
TEST RUN BETWEEN ~ FT AND ,~ IRT_.. FT
CERTIFIED BY: DATE:
72-008 (6/79]
SOIL AND MATERIALS
ENGINEERING
AND TESTING
John M. Lambe, P.E.
July 9, 1981
Besse Epps & Potts
2220 E. 88th Ave
Anchorage, Alaska
4101 Arctic Boulevard · Suite 205 · Anchorage, Alaska 99503 907-276-4113
MUNICIPALITY OF ANCHORAGE
DEPT. OF HEALTH &
ENVIRONMENTAL PROTECTION
JUL 1 5 198i
RECEIVED
Attention: Mr. Dave Grenier
Subject: Prospect Heights Subd #5
Case No. 5710
Gentlemen,
In response to your request, we drilled six additional borings numbered
9 through 14 on Tracts B and C, Prospect Heights Subdivision to supplement
the eight borings we drilled in late April. The purpose of the additional
exploration was to supplement the data with regard to the percolation
rates of the soil. To this end, we drilled one deep boring (generally
20' in depth) at each test location to observe soil stratification and
depth to free water. One and one-half inch I. D. slotted pipe was placed
in the deep boring to allow, observation of the seasonal free water level.
Adjacent tO each deep boring, a shallow percolation test hole was drilled
with 6" O.D. continous flight auger. Gravel was placed in the bottom of
the percolation hole. Four inch perforated pipe was placed on the gravel.
The annular space around the pipe in the boring was filled with gravel.
Water was placed in each percolation test the evening prior to testing.
The results of the tests are presented on the attached sheets. The locations
of the tests are presented on Plate 1 from our report dated April 27, 1981
revised to show the additional borings.
We trust the foregoing is sufficient to your needs. Please call if
we can be of further service or if you have any questions. As requested,
one copy of this letter was transmitted directly to the DHEP.
TEST HOLE-LOCATION DIAGRAM
PROSPECT HEIGHTS SUBDIVISION
TRACTS B& C
TEST HOLES NOT LOCATED
BY SURVEY METHODS
-N-
ZERMATT AVE.
T.H. 1:5 _~8.
TR. C
T. E9
'r.H. 5
TR. B
T.H. 4
'IH. I0
PLATE
1
/'%, ~,] ~ SOILS LOG
MUNICIPALITY OF ANCHORAGE ~
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION ~' PERCOLATION
825 L. Street, Anchorage, Alaska 99501 264-4720 TEST
SOILS LOG -- PERCOLATION TEST
SLOPE SITE PLAN
1
2
3
4
5
J6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
~\/'1~ ~ ~"~WAS GROUND WATER M.~:'
,.,,,,,~/~ O ~.,~ ~,..,~:~ ,~_ ~.~.. ,~ ENCOUNTERED?
COMMENTS
DEPTH? 0 ~ ' E
Reading Date Gross Net Depth to Net
Time Time Water ~ Drop
PERCOLATION RATE / '~ (mlnutes/inchl
TEST RUN BETWEEN ~' ET AND ~ FT
PERFORMED BY: L.,~ML~5~,~
72-008 (6/79)
DATE.'
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L, Street, Anchorage, Alaska 99501 264-4720
SOILS LOG-- PERCOLATION TEST
PERFORMED FOR: '~__~ ~___
LEGAL D E SC R I PTI O N :~O~::) ~_'T
1
2
3
4
5
6
7
8
9
SOILS LOG
PERCOLATION
TEST
10
SLOPE SITE PLAN
1
11
12
13
14
15
16
17,
18
19
20
WAS GROUND WATER
ENCOUNTERED?
IF YES, AT WHAT
DEPTH?
Reading Date Gross Net Depth to Net
Time Time Water ' Drop
7/Z/~ I 1! I~-T,. .~0 ~ 7_: 5-~
PERCOLATION RATE ~ {minutes/inch)
TEST RUN BETWEEN ~ FT AND ' 7 FT
CERTIFIED BY:
'/-"~ /'-'""1 ~ SOILS LOG
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION ~ PERCOLATION
~/ 825 L. Street, Anchorage, Alaska 99501 264~,720 TEST
SOILS LOG- PERCOLATION TEST
1
2
3
4
5
6
7
8
9,
10
11.
12
13
14
15
16
17
18.
19
2O
SLOPE SITE PLAN
WAS GROUND ATER
ENCOUNTERED?
IF YES, AT WHAT
DEPTH?
Reading Date
PERCOLATION RATE
TEST RUN BETWEEN
Gross
Time
Net
Time
Depth to
Water
(minutes/inch)
.//
/.'//
Net
Drop
'/-~/ /--~" J~ SOILS LOG
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION J~ PERCOLATION
TEST
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG- PERCOLATION TEST
PERFORMED fOR: ~.~ ~____~'~'_~ ~,~ ~::~ ~ DATE "ERFORMED: ~/~./~ --
LEGAL DESCRIPTION: ~;::~J~,~::~l~_'"~"--' ~'"~...~t.~-'"~'--~ ~0~[~> ~"~'""- /.,,~,,~,~
1
2
3
4
5
6
7
8
9
10
SLOPE SiTE PLAN
11
12
13
14
15
16
17
18
19
2O
WAS GROUND WATER , ! S
ENCOUNTERED? . ["~1 <~ L
O
P
IF YES, AT WHAT E
DEPTH? ~
Reading Date Gross Net Depth to Net
Time Time Water Drop
I~',j~- ~ ~ ~ ~
PERCOLATION RATE ~ ~ {minutes/inch)
TEST RUN BETVVEEN ~ FT AND . FT
PERFORMED
CERTIFIED BY: ~~----~
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG- PERCOLATION TEST
SOILS LOG
PERCOLATION
TEST
1
2
3
4
5
6
7
8
9
lO
11
12
13.
14
15
16
17.
18
19
20
COMMENTS
~_~: ~ SLOPE
DATE PERFORMED=. '/ /'S t --
SITE PLAN
WAS GROUND WATER
ENCOUNTERED? ~,,~ S
L
O
P
IF YES, AT WHAT E
DEPTH?
Reading Date Gross Net Depth to Net
Time Time Water Drop
~o~a~O I(-,, ~"z~S/¢
~z:~ ~ ~ t ~/~
PERCOLATION RATE
TEST RUN BETWEEN
PERFORMED
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG- PERCOLATION TEST
SOILS LOG
14
PERCOLATION
TEST
/¥
LEGAL DESCRIPTION:'~m~
1
2
3
4
5
6
7
8
9
10
SLOPE
't',,.t,o 5-'7
SITE PLAN
11
12
13
14,
15
16
17
18
19
2O
COMMENTS
WAS GROUND WATER
ENCOUNTERED?
IF YES, AT WHAT
DEPTH?
Gross Net Depth to Net
Reading Date Time Time Water Drop
~ ~0 ~ ~ '-J
PERCOLATION RATE d' {minutes/inch)
TEST RUN BETWEEN '~ FT AND 4 '/~--- FT
Dense Trees
March 29, 1976
W.O. 8956
Grid 2441
S.J.L. Land & Oil Ventures
c/o DOWL Engineers
4040 B Street
Anchorage, AK 99503
Attention: Mr. Maurice P. Oswald
Subject:
Subsurface Investigation, Prospect Heights
Addition No. 3, Located within the NE 1/4,
Sec. ~13, Township 12 N, Range 3 W, Seward
Meridian, Alaska
Gentlemen:
In accordance with your instructions, a subsurface investiga-
tion was performed on January 27 through January 29, 1976
for the Prospect Heights Subdivision Addition #3. The
include the following:
vicinity Map
Test Hole Location Sketch
Idealized Soil Profiles
Grain Size Distribution Curves
Test Holes Logs
Explanatery Information
Test Hole Logs (By Others)
Figure 1
Figure 2
Figures 3-5
Sheets 1-3
Table A
Appendix A
Appendix B
CONCLUSIONS
1)
Based on our experience, we believe individual on-site
wastewater disposal systems are feasible for this site.
2)
Since all lots in this project will be larger than
1-1/4 acres, the limiting percolation rates presently
required by the Anchorage Municipality Department of
Environmental Quality are:
ae
less than 30 minutes/inch if septic tanks are to
be used;
be
less than 60 minutes/inch if package treatment
plants are to be used.
S.J.L. Land & Oil Ventures
March 29, 1976
Page Two
3)
Judging from the test hole logs, we believe percolation
rates, as determined by our current testing methods
will probably be:
Se
Less than 30 minutes/inch for test holes 1, 3, 4,
5, and 6;
bo
Less than 60 minutes/inch for test hole 2 and
probably even less than 30 minutes/inch for test
hole 2.
Septic tanks and drain fields will probably be adequate
for all lots in the subdivision, though, (depending on
results of percolation tests performed on individual
lots after roads are constructed), package treatment
plants may be required for a few lots in the area of
Test Hole 2.
DISCUSSION
The exploration was conducted using a "Mobile Drill" model
B-50 d''~.~- ....... "~- ~ ~ = ~]~v~r~-Nodwell tracked vehicle.
The rig was equipped with a continuous flight solid stem
auger. This equipment is owned and operated by Denali
Drilling Inc.
Mr. O.M. Hatch, geologist with Alaska Testlab, suPervised
the drilling and logged .test holes 3, 4, and 5. For test
holes 1, 2, and 6, supervision and logging was done by
Mr. Wallace Oliver, staff technician with Alaska Testlab.
The approximate location of the test holes is shown on
Figure 2. Table A is the logs of these test holes.
As samples were recovered, they were sealed in plastic bags
to protect the samples and retain the natural moisture prior
to being transported to the laboratory. In the laboratory
the samples were visually classified and the moisture content
and dry strength determined. For easy reference samples of
similar color, texture, and particle size distribution were
given an arbitrary group designation. Additional laboratory
analyses for grain size distribution were performed on a
composite sample of each significant group. The compostion
of ~ndividual samples can vary somewhat from that of the
group as a whole.
Three general soil types were encountered and are listed
below by their group designation for reference to test
holes.
/?~S.J.L. Land & Oil Ventu
Group A
Group B
is a brown gravelly sand with a trace of silt and
also includes some brown silty gravell~ sand.
Frost susceptibility is sl~ghtto moderate with
frost classification ranging from NFS to F-2.
Unified classification is SP to SP/SM. This group
was typically poorly graded, damp to saturated,
had a medium to high density and was composed of
subrounded particles. Although mechanical analysis
of the composite Group A sample showed 13.5% fines
(-#~200), it is the writer's opinion that some of
these samples were cleaner in their natural state
and were mixed during
is a brown silty, gravelly sand. It is moderately
frost susceptible rated F-2. Unified classification
is SP/SM to SM. This group was typcially poorly
graded, damp to wet, had medium to high density,
and was composed of subrounded particles. Although
the grain size distribution curves for Groups A
and B are very similar, Group B was visually much
siltier than Group A.
is a ,~ery ~]~v ~r~v~]]v ~nd. Individusl samples
within this gr~u~ include silty gravelly sands,
(SM); gravelly sandy silts, (SM); and possibly
sandy silts, (ML). However, frost classification
ranges from F-2 to F-4.
Particular attention-should be called to the soil description
in the test hole logs when they make mention of cobbles and
boulders because these larger particles are not recovered by
the auger and are detected by indirect means (drilling
action). Thus, samples sent to the laboratory do not include
any cobbles and boulders. In sandy gravel and gravelly sand
soils, some of the larger gravel particles occasionally roll
from the auger flights. "Grab" samples of these soils some-
times contain more sand and less gravel than actually exist
in place. Referring to the logs of test holes 3 and 6, the
silty sandy gravel (GM), materials encountered in the field
were classified as a silty gravelly sand (SM)~ in the labora-
tory, but may be closer to a silty sandy gravel in the
natural state.
Additionally, there may be some contamination of samples.
When a granular NFS soil is overlain'by silty materials,
some of the siltier soil may be scraped from the wall of the
test hole as the auger is raised. This can cause the laboratory
sample to have a higher fines (-~200) content that actually
exists in the field. For example, test hole #5 of this
project shows an NFS gravelly sand (SP) soil existing in the
S.J.L. Land & Oil Ventures
March 29, 1976
Page Four
field at the 12'-15' depth. However, .the samples recovered
from the 12.5' and 15' depths in test hole #5 were classified
in the laboratory as a silty gravelly sand with a frost
classification of F~2 and unified classification of SP/SM.
This is probably due to contamination of the sample. For
aid in interpretting the test hole logs, explanatory informa-
tion is contained in Appendix A of this report.
The soil gradations shown on the attached grain size distri-
bution curve are for qomposite disturbed samples and do not
reflect stratification which causes the soils to be more-or-
less sorted in the field.
Water levels were measured during drilling and approximately
one week after drilling. The water levels given should be
used with caution as the water level may tend to fluctuate
with percipitation and runoff as well as seasonally.
Unseasonably warm weather during exploration, causing snowmelt,
may have affected some of the water levels.
Due to steep topography of the project site, percolation
tee.° ...~ ~. ~o~m~ ~,~* ~ q,/~ ~b.: ~~°~ Pvc
pipe casing was left in each hole to facilitate future
percolation tests.
Except at the test hole locations, the idealized soil profiles
(Fig. 3-Fig. 5) are only estimated. Wide variations between
the soil profiles shown, and actual field conditions may
and, in fact, probably do exist. Two of the test holes used
for the profiles were dug and logged by others. Records of
these holes were obtained from the Municipality of Anchorage
Department of Environmental Quality.
We trust the foregoing is sufficient and meets your present
needs. Should questions arise~or if we can be of further
service, please feel free to contact us.
Very truly yours,
APPROVED:
H'ar~~rT.~e ~ PE
ALASKA TESTLAB
R. Mark Hansen
RMH: HRL: nun
THIS PROJECT
'~' Test H°les bY A'T'L' !
[] Test Ho les by --
. Other~ --~ / ~
I '
/-
TEST
I
HOLE LOCATION SKETCH
SCALE 1"='100'
Fig. '2
Z
l,o
N~.
OLd
O~
~! 0
=_.z
id
_J
8-'H~
J
J
J
0
Z
S~3H10 A8
6 -'H '1
o·
9-*H '.L
UJ
Ou~
~ 0
_o ~o ~o o ~o ~o o
m.w ~ --i ,u- ~ co o o o o o
.I
Test Hole
Table A
WO #8956
Date: 1-27-76
Depth in Feet
From To
0.0' - 0.8'
0.8' - 10.0'
10.0' - 11.0'
Soil Description
Peat and Roots
F-2, slightly Silty. Gravelly Sand, SP/SM
brown, poorly graded, damp, subrounded
particles to 2". Boulders from 5.0' to
7.0'
F-2, Silty Gravelly Sand, SM, brown~ poorly
graded, saturated, subrounded particles to
Bottom of Test Hole:
Frost Line:
Free Water Level:
11.0'
10.0' while drilling
8.2' after one week
Sample Depth
I 5.0'
2 10.0'
Type of Dry
Blows/6" M% Sample Strength Group Unified
-- 5.8 Grab .N A SP/SM
-- Sat. Grab -- B SM
Remarks:
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
· Test Hole #2
Depth in Feet
From To
0.0' - 1.0'
1.0' - 5.0'
5.0' - 10.0'
10.0~ - 15.0'
Bottom of Test Hole:
Frost Line:
Free Water Level:
Table A
WO #8956
Date: 1-27-76
Soil Description
Peat and Roots
F-2, ~ilty Gravelly Sand, SM, brown, poorly
graded, occasional cobbles and boulders, damp.
F-4, Gravelly Sandy Silt, ML, brown, damp,
subrounded particles to 2".
F-4, Gravelly Silt, ML, brown, damp, sub-
rounded particles to 3".
15.0' ~
3.0'
None Observed.during drilling
14.5,' after one week
~mple Depth
I 5.0'
2 10.0'
3 15.0'
Type of Dry
Blows/6" ~.~ S__a~ple ~rengt~ Group Unified
-- 10.5 Grab N B SM
-- 8.2 Grab N B SM
-- 9.2 Grab L-N C ML
Remarks:
Type of Sample~ G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low,. M=Medium, H=High.
Group refers to similar material, this study only.
Test Hole #3
Table A
WO #8956
Date: 1-28-76
.Depth in Feet
From To
0.0' - 2.0'
2.0' - 4.0'
4.0' - 8.0'
8.0' - 20.0'
Soil Description
F-4, Sandy Silt with trace gravel, ML, brown,
damp, stiff, NP.
F-l, Silty Sand~ Gravel, GM, brown, damp,
medium to high density, subrounded particles
to 3".
F-2, very Silty Gravelly Sand, SM, brown,
poorly graded, ~dium density, subrounded
particles to 2" Silt content is 35%± at
5.0' and 15-20% at 7.5'
F-2, ~ilty Gravelly Sand, SM, brown, poorly
graded, damp, medium density~ subrounded
particles to 2". Silt content is 15-20%
at 10.0', 25%± at 12.5', 15%± at 13.0',
15.0' and 20.0'
Bottom of Test Hole:
Frost Line:
Free Water Level:
20.0'
4.0'
None Observed
Sample .Depth
1 5.0'
2 7.5'
3 10.0'
4 12.5'
5 15.0'
6 20.0'
Remarks:
Type of Dry
Blows/6" M% Sample Strength Group
-- 9.0 Grab N B
-- 8.6 Grab N B
-- 8.2 Grab N B
-- 7.9 Grab N C
-- 7.6 Grab N A
-- 8.7 Grab N A
Unified
SM
SM
SM
SM
sp/sM
SP/SM
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low, M=~{edium, H=High.
Group refers to similar material, this study only.
· Test Hole #4
~epth in Feet
From To
0.0' - 1.5'
1.5' - .3.0'
3.0' - 8.0'
8.0' - 11.0'
11.0' - 13.0'
13.0' - 20.0'
Bottom of Test Hole:
Frost Line:
Free Water Level:
Table A
WO #8956
Date: 1-28-76
Soil Description
Peat, Pt, brown, damp, soft.
F-4, Sandy Silt, M~, brown, damp, stiff,
NP. ' -'
F-2, Silt_y_ Gravelly Sand, SM, brown, poorly
graded, damp, medium density, subrounded
particles to 3" Silt content 20%+ at 5.0'
15%! at 7.5' (more gravel).
F-2, very silty Gravelly Sand, SM, brown,
poorly graded, damp, medium density, sub-
rounded particles to 1" Silt content 35%±.
F-2, ~lty Gravelly Sand, SM, brown, poorly
graded, dam~', medium'density, subrounded
particles to 2" Silt content 20%±.
F-2, very Silty slightly Gravelly Sa~d, SM,
poorly graded, damp~ medium dens~hy: ~h-
rounded particles to 1" Silt content 40%± at
15.0', 20%± at 17.0' to 20.0'.
20.0'
3.5'
None Observed
~ampl~ Depth
1 5.0'
2 7.5'
3 10.0'
4 12.5'
5 15.0'
6 20.9'
Remarks:
Type of Dry
~lows/6" M% Sample ~trengt~ ~roup Unified
-- 9.0 Grab N A SM
-- 8.1 Grab N C SM
-- 9.8 Grab N C SM
-- 8.0 Grab N C SM
-- 10.5 Grab N C SM
-- 9.4 Grab N B SM
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers t6 similar materJal~ this study only.
'Test Hole #5
Table A
WO #8956
Date: 1-28-76
Depth in Feet
From To
0.0' - 1.5'
1.5' - 3.0'
3.0' - 6.0'
6.0' - 8.0'
8.0' - 12.0'
12.0' - 15.0'
Soil Description
Peat, Pt, brown, damp, soft.
F-4, Sandy Silt, ML, brown, damp, stiff, Np.
F-4, Gravelly Sandy Silt, ML, brown, damp,
stiff, NP.
F-2, Silty Gravelly Sand, SM, brown, wet,
medium density, subrounded particles to 2",
probably wet from snowmelt.
NFS/F-2, slightly Silty very Gravelly Sand,
SP/SM, brown, poorly graded, damp, medium
density, subrounded particles to 2".
NFS, slightly Gravelly Sand with trace silt,
SP, brown, poorly graded, damp to saturated,
medium to high density, subrounded particles
to 1" Gravel not recovered in Sample #4.
Bottom of Test Hole:
Frost Line:
Free Water Level:
15.0'
3.0'
Saturated at 14.'0' during drilling
Sample. Depth
1 5.0'
2 7.5'
3 10.0'
4 12.5'
5 15.0'
Remarks: 1.
2.
3.
Blows/6"
Type of Dry
M% Sample. Strength Group Unified
16.9 Grab L-M C ML
13.7 Grab L-M C SM/ML
7.9 Grab N A SP/SM
4.4 Grab N A SP/SM
Sat. Grab -- A SP/SM
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
.Test Hole #6
pepth in Feet
From To
0.0' - 1.0'
1.0' - 7.5'
7.5' - 20.0'
Bottom of Test Hole:
Frost Line:
Free Water Level:
Table A
WO #8956
Date: 1-29-76
Soil Description
Peat, Pt, brown, damp, soft.
F-l, slightly Silty Sandy Gravel, GP/GM,
brown, poorly graded, occasional cobbles,
damp, medium density, subrounded particles.
NFS, Gravelly Sand, SP, brown, poorly graded,
fine sand, damp, medium density, subrounded
particles to 1" Saturated at 17.5'.
20.0'
3.0'
17.5' during drilling
15.2' after one week
.S. ampie. Depth
1 5.0'
2 7.5'
3 10.0'
4 12.5'
5 15.0'
6 20.0'
Biuws/'6"
Type of Dry
4.7 Grab N A SP/SM
5.2 Grab N A SP/SM
4.0 Grab N A SP/SM
3.8 Grab N A SP/SM
4.0 Grab N A SP/SM
Sat. Grab -- B SM
Remarks~
Type of Sample, G=Grab, SP = Standard Penetration.
Dry Strength, N=None, L=Low, M=Medium, H=High.
Group refers to similar material, this study only.
APPENDIX A
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 sol type was observed through drill action, direct
observation or sampling.
Frost Classification - NFS, FI, F2, F3, F4, see "Soft 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 - this is a qualitative measure:
dry. no or little apparent surface moisture,
damp, mo'~st ure forms portion of color, less than plastic limit,
wet, no free water, often soft, if cohesive soil,
saturated, free water may be squeezed out, ifa free draining soil;
sand. (The moisture content is further dcfinedby reference to PI,
LW, NP, M% or dilatency.)
Density - refers ro more-or-less non-cohesive soils, such as sand gravel
mixt~es 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.
Stiffi~ess - refers to more-or-less cohesive sglls and fine grained silts of
the clay-silt grocps. Derived from drill action and/or sample data. Very
soft, soft, stiff, very stiff and hard arc commonly used terms.
Particle size - The largest particle recovered by the split spoon is
~1-3/8", Shelby tube 3", auger flights (minute-man) 2", Auger flights
(B-50 hollow stem) 6"-8". Larger particles are described indh-cctly by
action of the dzilling and arc referred to as cobbles, 3" to 8", or
boulders 8"+. Therefore when reviewing the gradation sheets, if any,
the description on thc hole log must be considered for an indicatiou 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 chxssiz~.cations may be shoxw~ as well as the unified.
Atterbcrg Limits - useful for fine grained and other plastic soils.
PI; natural moisture content believed to be less than plastic limit
PI+; natural moisture content believed to be between plastic and liquid
[-~mits
L~w-Vl natural moisture content believed to be greater than liquid limit
N__P_; non-plastic, useful as a modifying description of some silty
materials.
Dil~tcncy - is the ability of water to migrate to the surf'acc of ~
saturated or nearly saturated sod sample when vibrated or j~dtcd - used
as ~n .aid to dc~crminc if a fine grained soil i~ a ~lightly or nmi-plastic
silt or a volcamc ash.
Rock flour - finely ground soil that is not plastic but otherwise appears
similar to a 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.
~uck - a modifier used to describe very soft, semi-organic deposits
usually occuring below a peat deposit.
Amorphus peat - organic particles nearly or fully disintegrated.
Fibrous Peat - organic particles more-or.lesa intact.
Bottom of Testhole - includes last sample interval.
Frost Line -- seasonal frost depth as described by drfiim~ ,~on ,~nuiot
samples at the time of drilling.
Frozen Ground - other titan frost linc, 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 ar other
seasons. Static water table determination in other than very permeable
soils requires observation wells or piczometcr installations, used only in
special cases.
Blow/6" -- The number of blows of a 140 weight free falling 30" to
advance a 2" split spoon 6"; the number of blows for a 12" advance is,
by definition, thc standard penetration.
M% - natural moisture content of the soil sample, usually not
performed on .clean sands or gravels below the water table.
Type of Sample. -
S__P, refers to 2" split spoon driven into the soil by 140 pound
weight, a disturbed sample,
S, thin wall tube, "Shelby" used to obtaiu undisturbed samples
of fine grained soil,
.G., "grab" disturbed sample from auger flights or wall of trench,
(:2, cut sample, undisturbed sample from wall of trench.
Dry Strength - a useful indicator of a soil's clayey fraction, N=None,
L=Low, M ~Medium, l-t~ High
G-nu[~ - Thc sampl¢~ are placed into apparently similar groups based
on color and texture and arc ;~rbitrarily assigned a group letter. Further
disturbed tests including Attcrbcrg Limits, gsain size. maid,ute.density
relationship, etc. may be performed un the gr~up and arc a~sumed
reflect the ge~¢ral distruhed cbaraeteristic~ of thc soils as::igned to the
group. This is an important phase of the soil ;maly~is ,md is u~¢d to
standardize thc various qualitative dcterminatinlLs alid to reduce thc
number of quantitative tests necessary to describe thc soil m;a~s.
SOIL CLASSIFICATION CHART
· 30% GRAVEL
/ CLAYEY,
?%
/ X ~( GRA~LLY SAND g SANDY GR~VEL ~
0 10 20 30 40 50 60 70 80 90 100
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:
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) CONTAININ¢~ MORE THAN 15% FINER THAN 0.02 mm.
b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS,
F4 a. ALL SILTS INCLUDING SANDY SILTS.
b. FINE SILTY SANDS CONTAINING MORE TF4AN 15% FINER THAN 0.02 mm.
c, LEAN CLAYS WITII PLASTICITY INDEXES OF LESS THAN ]2.
d. VARVED CLAYS,
APPENDIX B
R&M ENQ JRERING & GEOLOGIC-, ,L CONSULTANTS
229 EAST 51st. AVE. - P.O. BOX 6087 - ANC;HOh~,GE, ALASKA 99503
TELEPHONE 907-279-0483 TELEX 090-35419
Civil Engineers Geologists Land Surveyors
JAMES W. ROONEY. P. E,
MALCOLM A. MEHZISS. P.E., L.S.
JAMES H. WELLMAt,I, P.E.
July 26, 1973
RECE~¥ED
R &'.[..i. Project No. 36639
RALPH R. MIGL. IACCIO
Kincaid & Son Construction
7801 Jodphurst
Anchorage, AK 99502
Re: Test Hole and Soil Log Report for Sanitary System
Lot 14, Block 2, Prospect Heights Subdivision
-Dear Mr. Kincaid:
We are submitting hereQith the test boring results and our
comments regarding soil conditions encountered at the subject
site. This investigation was performed in accordance.with
your request of July 26, 1973, and those procedures outlined
in a letter dated September 13, 1971 by Mr. Rolf strickland
of the Grea~e~- Anchorage Are~ ~orough ~epartment of Ep~iron-
mental Quality.
A single test hole was'put down within the Lot 14 area for the
purpose of defining general subsurface soil conditions for the
proposed sanitary system. Excavation was accomplished with a
tractor-mounted backhoe and the test hole was extended to a
total depth of 14.5 feet below ground, surface. The final log
prepared for the test hole has been included in Drawing A-01.
Ground water was not encountered in the test hole.
We aPpreciate being given this opportunity to be of service to
you. Should you have any questions with regard to the above,
please do not hesitate to contact us.
Very truly yours,
R & M ENGINEERIMG & GEOLOGICAL CONSULTANTS
a:ae~ W. Rooney
/
zc: GAAB V/
T.H.- I
7 - 26-7:~
SANOY SILT, WITH SO'ME
SAND AND GRAVEL
TRACE ORGANICS (S1'4)
o.d
2.01
GRAVELLY SAND WITH
TRACE TO SOME SILT
AND COBBLES ( S P - GM }
Test hole excavated
Engineering ~ Geological Consultants
14.5'
No Water Table T.O,
with tro¢lor mounted backhoe,
KincrJid And Son Construction
LOGS OF TEST
Anchorage
BORINGS
Alaska
GRE,,'"-"~E'R ANCHORAGE AREA BC-'OUGH
DEPARTMENT OF ENVIRONMENTAL QUALITY
3330 "C" STREET ANCHORAGE, ALASKA 99503
TELEPHONE 274-456 I
PERMIT NO,
SEWAGE DISPOSAL SYSTEM APPLICATION AND PERMIT
~A'UNG ADDBESS P~O,x'/ff/'/O'd'
PHONE,
INSTALLATION OF: SEPTIC TANK
TYPE AND SIZE OF F~CILITY TO BE SERVED
SEEPAGE. PIT- ,
. DRAIN FIELD
OTHER
FINANCED THROUGH
SOiL TEST BESU'TS
COMPLETION DATE ANTICIPATED.
NOTr:% THIS PERMIT IS NOT VALID WITHOU.T SOIL TEST '
FINAL INSPECTION: 24 HOUR NOTICE REQUIRED. BACKFILLING OF ANY SYSTEM WITHOUT FINAL.INSPECTION BY THE
DEPARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL bE SUBJECT TO PROSECUTION.
RIIN~I~IUM DISTANCES, REQUIREMENTS
FOUNDATION TO SEEPAGE PIT , ~O !
DRAIN FIELD.
SEPTIC TANK TO SEEPAGE PIT WALL
~EPTIC TANK ~-- I · SEEPAGE PIT ~ I
TO NEAREST LOT LINE.
W~kL TO SEPTIC TANK . /~
W/.TER MAIN TO SEPTIC T NK /~ I
DRAIN FIELD
· Z .eo l Z
SEPTIC TANK SIZE TYPE /~1), ~'~/~E SEEPAGE AREA SIZE TYPE
DIAGRAM OF SYSTEM
, DRAIN FIELD ./O ·
SEEPAGE P'T
· ALSO CONSIDER AREA WELLS.
· SEEPAGE PiT
CAST IRON INTO AND OUT OF SEPTIC TANK AND INTO CRIB CROSSING GAP OF
SEPTIC TANK. ? /¢)~'~ , SEEPAGE PIT . /OD DRAIN FIELD
TO BIVER. LAKE. STREAM.
EXCAVATION S FEET INTO UNDISTURBED SOIL.
4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE PiT
FITTED WITH AIRTIGHT REMOVABLE CAPS.
CONFORM TO BOROUGH REGULATIONS REGARDING INSTALLATION.
I Cr-RTIFY THAT I AM FAMILIAR WITH THE REQUIREMENTS OF (~REATER A~CHORAGE AREA BORO/U.~H ORDINANCE NO 28-68 AND
DESCRIBEDi SYSTEM/ IS IR ACCORDANCE WITH SAID COD~-'I~ . -"'' ~ · THAT THE A~OVE
GREATER AI,ICIIOICA[;I:i ?,RLA I;OROU,...
Department of Lnvi ronn)c, ntal (~-~'t i Ly
3330 "C" Street
Anchorage, Alaska 99b03
· ";()II,$ 1,0(~ -. I'EI~.OI,ATION TE?;T
This form reports: Soils ]o9 Percolation ~est
Dep th
Feet
1-
2-
3-
4-
5-
6-
7-
9-
11-
.12 -
1.3-
Was ground water encountered?
If yes, at whaC depth?
Reading
Date Gross.Time
Net Time e.pth to Water
Net iJrop
Percolation rate minute.
'Proposed installa~T~'n-.'- Seepa'ge Pit Drain Field
Del)th of Inlet ., Depth 'ti)']~'i-t%~n-qJ'f-i)it or trench
~-" -'-' '?."c' 7, ,.., ..~, ..~, ./ t.,-.<~/ ._,~,,¥,,.,..
COH/1ENTS: l'>' '.' ~,. ~,,'"'~" ...... -'--~ '~ ' ....
.___-.-_ r ........ ' ....... - o _ _ -7,,~_ _ _ ~.t" .......... _._ .~ .... a,._ .... r .~.rrd.~_£ ...............
X" ' '"--'"':---- '
,-,,.Z...,
Pe-fo~,,,d'm,- /[g.-~'.. '~ //-/-,~o.~' Certified By-:
' "~, /'~ · z' ....----..": .... '
EO-O4n ~nl?a~
DEPARTM[NT OF ENVIRONIqFt.IYAI_ OU~I.I'I'¥ Case /!
JU.I~ 6 1974 ~1 /--~, 3330 "C" Street ~
ANCHORAGE, ALASKA 99503
Performed For BobO~ali Dated Performed June4, ~97~
Legal Description: Lot 2 Block ~ Subdivision B~aspactHai~hts
This Form Reports SOilS Lag XX Percnlation Test
Soil Test Must Be Logged To 4' Below Proposed Seepage System-
Depth
Feet Soil Characteristics
5--
6--
.8
9
10'--
11--
12--
13--
14--
16
Peat, etc,
Light brown sandy silt with
occasional coarse gravel SP-GM
Coarse gravel, coarse sand GW
Grey sandy siltwith cobbles
and coarse gravel
ML-G
Dark brown sandy silt
with clay CH-SM
Coarse gravel and cobbies GW
Was Ground Water Encountered? No
·
If Yes, At What Depth?
Reading
Date
Gross Time
Net Time
Depth to H20
Percolation Rate Mi nul:e
Proposed Ins'f. aliat~-~-: Seepage Pit XX Drain Field
Depth of Inlet Depth to Bottom ~-f--Pit or Trench'
~0biMENTS: Based on Borough regutations, wa recommend 168 sq. ft. per bedroom.
Net Drop
16'
Test Performed BY Joll.nJg~_LLe$on
Date Certified BY:
Date:
This Fcrm Reports
Was G~ound %:ater Encountered? .... .~_(~.
i,o.:at '~c."'i 3Le.'.ch
GRE,?'~ER ANCHORAGE AREA BC ~UGH ...... :-- -' .'-
DEPARTMENT OF ENVIRONMENTAL OUALIT~ PERMIT NO.
3330 "C*' STREET ANCHORAGE, ALASKA 99503
TELEPHONE 274~455!
SEWAGE DISPOSAL 5¥STEM APPLICATION AND PERMIT
INSTALLATION LOCATION /~/~) ~/)~-~-
INSTALLATION OF: SEPTIC TANK _ SEEPAGE PIT , DRAIN FIELD . OTHER
"7~ _.-~- ~ ~ -
SOIL TEST RESULTS ~' --' /%~l~.~[ ~'~,~'~7~ NOTE: THIS PERMIT IS NOT VALID WITHOUT SOIL~
FINAL' INSPECTION: Z4 HOUR NOTICE REQUIRED· BACKFILLING OF ANY SYSTE~ WITHOUT FINAL.INSPECTION BM TH~
D~PARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL BE S~T
FOUNDATION TO SEPTIC TANK
FOUNDATION TO SEEPAGE PIT 2~)
SEJ~TIC TANK TO SEEPAGE Pit WALL
TO NEAREST LOT LINE.
DRAIN FIELD
'WA.TEE MAIN TO SEPTIC TANK
DRAIN FIELD
· DRAIN FIELD
20 / /0 /
.. DRAIN FIELD
/
ALSO CONSIDER AREA WELLS.
SEEPAge PIT
/ O_O'/
DRAIN FIELD
CAST IRON INTO AND OUT OF SEPTIC TANK AND INTO CRIB CROSSING GAP OF
EXCAVATION 5 FEET INTO UNDISTURBED SOIL.
4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE PIT
FITTED WITH AIRTIGHT REMOVABLE CAPS.
(;RAVEL BACI(FILL
CONFORM TO J~OROUGH REGULATIONS REGARDING INSTALLATION.
DIAGRAM OF S¥STE~I
I CERTIFy THAT I AM FAMILIAR V/ITH THE REQUIREMENTS OF GREATER At~/C~I~t~AGE ~REA BOROUGH ORDINANCE ~10. 2B.60 AND THAT THE ABOVE
DAT~ APPLICANT'S SIGNATURE
~ ........ _~.~ 103 ~. 26TH AVE.~-~;CHORAGE 272-891~
NEIL~-~,~.GhT BUILDING~ PALME'R 7~S-/[417
April 16, 1974
Mr. Earl J. Clabo
P.O. Box 3-4056
Anchorage, Alaska 99501
Re: Soils Log Lot 8A Block ~1
Prospect Heights Subdivision
Dear Nr. Clabo:
Transmitted.herewith is the soils log for a test hole taken on the above
referenced property per your request. It should be noted that the gravel
thickness in the ho]e widened from three (3') feet on the north side of the
hole to six (6') feet on the south side of hole. l'his would indicate that
the gravel would increase in thickness in the location you propose to place
the seepage pit.
- Leo//Schebdn Jr., P.E., L.~.
Partner
LS/m~
Enclosure
~.ORDON D. UNWIN, P.E. LEO £CI~EBEh~ J~.~ P.E.
· 12.
13
..15
19
23.
'...... S'O I E S L 0 u-. '
'CLi'~T E.J. C1J-~, .,--~TEST tt0LE NO.
· . ' '".7. DATE ^pr11 16, 1974'.
PROJECT Test' I{ole " .... ' .....
· . ...: .... ~.. . '<.. .. . :.
."~].~.. ~OP O~ HOLE"Lowest ~ec{~on 'of Lot' W.O~ .NO..74106
~-i~"pe~ &'Ove'r"¢~¢Sen' "' .' ' . .......... .
................ .... ..... '- .'
..'~. '. " . .... ~.Zi'% ......... ¢.
.S./C ~, ' ....... = ................. ' ·
~'~ · - .l..=..:: ,.. ',='. .... ::=-/.'.~ ~_'2.d.[~ ..... = .......... .= ............
~. - : .' ... .'":. _~.__._.. ...Lf--L ....... ~-. -f ....."' =: .... ·
Wet Sandy, SJ.I.~,.& .~r.a.V~J~ODD.J~_I~-~~- ~. ] - --
0
1
2
1
7
7
350 ~
PROSPECT HEIGHTS SUBDIVISION
ADDITION NO. 5
1982-1421 1982-2709
1 z 3
7
4
SURVEYOR'S CERTIFICATE
// DE'TAIL
PROSPECT HEIGHTS SUBDIVISION
ADDITION NO. 5
LOTS ~t~uS, Block I~ LOTS Ith~uS~10ck2
-5'7to