sr-012781-5eSanta Monica, California, December 30, 1980
T0: Mayor and City Council
.1~1N 1 3 1g?p
FROM: City Staff
SUBJECT: Report and Recommendations Regarding Exploratory Drilling `~
to Determine Source and Extent of TCE in Groundwater ~JpN ~ 7 1981
Introduction
This report presents results of the first phase of the exploratory drilling
and makes recommendations regarding further work.
Background
At its April 14, 1980 meeting, the City Council authorized the engagement
of a qualified Consultant firm to drill exploratory wells and perform-
investigatory samplings to determine the extent of suspected chemical con-
tamination of the sub-strata in the area of Santa Monica Well #3 near Olympic
Boulevard and Centinela Avenue and Well #2 at the City Yards. Funds in the
amount of '$50,000 were authorized to be expended from the Water Reserves
Fund.
At its August 12, 1980 meeting, the City Council awarded a contract to
Pacific Soils Engineering, Inc., of Harbor City fora phased proposal.
The first phase was estimated to cost $18,485 and the total program to not
exceed $66,330.
The first phase work is now completed and approximately $18,000 has been
expended. The first phase consisted of drilling and testing the material
from seven borings at depths from 50 feet to 150 feet. The first six
borings were done in September, the seventh in November.
JAN 2 '7 1981
JAN 1 3 1989
Mayor and City Council -2- December 30, 1980
Two potential sources of TCE were identified
The old clay pits were
believed to be a possible source of the contamihation because they were
used as dumps with no records as to what was dumped in them. The second
potential source was identified as a former Douglas Aircraft facility
located at the corner of Olympic Boulevard and Centinela Avenue.
The results of the first phase work indicate no significant amounts of TCE
present in the material within thepits (trash and rubble) or in the soil
immediately below the pits.
The results of the first phase work near the former Douglas facility indicate
ground water concentrations of TCE of 60+ parts per billion. This is
considered a high concentration but was the only significantly high level
of TCE found in any of the drilling and testing. Before it can be concluded
with certainty the site is the source of the contamination, additional
exploration, sampling, and testing will be required. The work will consist
of additional borings around the perimeter of the property and is estimated
to cost $18,000.
Recommendation
It is recommended the City Council authorize additional testing as described
not to exceed $18,000.
Prepared by: Stan Scholl
fjdd~Tio~v
5~
JAiJ 2 7 19u1
Phone i Report
EXPLORATORY DRILLING &SAMPLING
Ground Water Study for Presence of TCE
CITY OF SANTA MONICA, CALIFORNIA
~~~
?JAN 2 '~ ~^ a+
PACIFIC SGIlS ENGINEERING, INC.
-~ PACIFIC SOILS ENGINEERING, 1NC.
1402 W. 240TH STREET, HAR80R CITY, CALIFORNIA 90710
TELEPHONES: (213) 325.7272 OR 775-b771
City of Santa Monica
City Hall
1685 Main Street
Santa Monica, California 90401
Attn: Mr. E. H. Lash, Enterprises Manager
ORANGE COUNTY OFFICE
37909 Fitch
Irvine, CA 92714
(714) 557.96s0
December 11, 1980
Work Order 200984
Subject: Phase I Report
Exploratory Drilling and Sampling
Ground Water Study for Presence of TCE
City of Santa Monica, California
------------------------------------
Gentlemen:
As authorized by the Santa Monica City Council, this firm has conducted a Phase I
investigation into the presence of TCE in the ground water in the Vicinity of City of
Santa Monica's Watet Well Nos. 2 and 3. Presented herein. are our findings and
recommendations for handling. the concentrations of TCE currently present in the
ground water.
These findings and recommendations are based, in part, upon an exploratory drilling,
sampling and laboratory testing program.
r
1. SITE DESCRIPTION
The subject water wells (City of Santa Monica Water Wel Is Nos. 2 and 3)
where the presence of TCE has been detected, are located in the easterly edge
of the City of Santa Monica. Well No. 2 is located within the City's Water
December 11, 1980
Work Order 200984
Page 2
Division's Maintenance Yard approximately l50 feet southerly of the intersection
of Steward Street and Exposition Boulevard.. Well No. 3 is located in the center
divider to Olympic Boulevard approximately 300 feet southwesterly of Centinela
Avenue.
for the Phase I investigation a target area around these two wells was established.
This target area is roughly bounded by Colorado Avenue, Centinela Avenue, Santa
Monica Freeway and Cloverfield Boulevard. Light industrial and office buildings
currently occupy approximately 2f3 of the. target area. Residential areas are
located iri the northerly and easterly comers of the target area.
!~. check of old aerial photographs indicate that this area was used primarly for
agriculture and open pit clay mining. The old pits were generally used as trash
dump sites after the clay mining was abandoned. The accompanying street map
of the target area shows the approximate maximum limits of the clay pits in the
area as shown on available aerial photographs.
II. FIELD EXPLORATION AND LABORATORY TESTING"
Seven (~ exploratory borings weredrilledwithin thePhase I target area utilizing
a truck-mounted hollow stem continuous flight auger. The first six (6) borings
were drilled between September 2 and 12, 1980. A seventh and supplemental
PACIFIC SClILS ENGINEEriWG, INC.
? December 11, 1980
Work Order 200984
Page 3
boring was drilled on November l8, 1980. The depths of borings ranged from
t 50 + to 150 + feet. Approximate boring locations are shown on the accompanying
map of the area. Two (2) of the boring locations were selected to allow sampling
of the material within two (2) old pits.
Each boring was logged and the soils encountered classified by visual and tactile
methods.. Logs of Borings containing a field description of the subsurface condi-
Lions encountered are presented on Plates 1 through 12.
Samples of the soils encountered were obtained using a drive tube sampler.
Portions of each sample were immediately transferred to glass bottles and sealed
for transportation to the laboratory. Samples of ground water where encountered
were also taken and bottled. During storage and transportation, all samples were
kept refrigerated..
Laboratory testin g for the presence of trichloroethylene (TCE) was performed by
West Coast Technical Services, Inc. using a gas chromatograph with an electron
capture detector. For soil samples, approximately 30 grams of soil was removed
from the sample vial. The remaining soil was weighted and five (5) milliliters of
hexane was added to the sample with approximately 15 milliliters of organic free
water. The sample was shaken for two (2) minutes and allowed to stand for one (1)
hour before analyzing.
PACIFIC SOILS ENGIN EERWG. INC.
December 11, 1980
Work Order 200984
Page 4
The water sample was analyzed by extracting ]0 milliliters of sample with 0.5
milliliter of hexane.
The gas chromatographic analysis was carried out on a Varian 3700 gas chroma-
tograph equipped with six (6) foot x 2 mm glass column packed with 10% squalane
on 80/100 mesh Chromosorb WAW . The column temperature was isothermal of 55
degrees C and a carrier gas flaw rate of 25mL/min. of nitrogen.
To check for loss of TCE during the removal of dirt from the sample vial, a known
quantity (5:37 ug) of TCE was spiked into the sample. The procedure, described
above, was then carried out. The percent recovery was 47.0%,
Laboratory test results are presented as port of the Logs of Borings and on the
two cross-sections.
I11. DISCUSSION
Information received from the exploratory drilling portion of the investigation
indicates that with one (]) major exception the subsurface soils are relatively
uniform over the entire target area.
The one {1) exception was an apparent discontinuity that trends across the target
area in an east-west direction approximately along the alignment of Olympic
Boulevard. This discontinuity indicates the presence of the South Branch of the
PACIFIC SOILS ENGINEERING, INC.
December 11, 1980
Work Order 200984
Page 5
Santa Monica-Malibu Coast Fault which is shown in several publications at
approximately this location. Evidence of the fault presence was indicated by
both a significant change in ground water level and the soils encountered at
depth.
Northerly of the indicated fault location ground water was encountered at an
approximate depth of 35 feet, while on the southerly side of the fault ground
water was not encountered within the first 100 + feet below the ground surface.
_' Also, at a depth of 90 + feet on the southerly side of the fault an orange and off-
white gravelly coarse sand was encountered. Thegravel within this sand was pre-
dominantly off-white and subrounded. Only an occasional piece of the black
Santa Monica Slate was observed within this sand strata. On the northerly side
of the fault the black slate particles account for almost all the sand and gravel
size particles encountered. Based on well drilling logs for Santa Monica Water.
Well No. 2 it is believed that this sand is the top of water-bearing aquifer. North
of the fault (at Well No. 3) the top of the aquifer is located at a depth on the
order of 200 + feet.
With the exception of the gravel discussed above, the native soils were predomi-
nantly a medium brown clay with varying amounts of sand and gravel size pieces
of the black Santa Monica Slate. The clay is generally stiff and damp to wet.
PACIFIC SOILS ENGINEERINGo INC.
December 11 1980
Work Order 00984
Page 6
During the preliminary planning for this investigation, two (2) potential sources
of TCE were identified. The old clay pits were believed to be a good source of
the TCE contamination cs after the clay mining was stopped the pits were used
as trash dumps, with no records as to what was dumped in them. For this reason
two (2) borings were drilled through two of the pits to allow sampling of the
material within the pits. The two pits selected were the two pits located closest to
the contaminated water wells. The first pit drilled was the large pit located under
the City's Maintenance Yard and extending to within l00 + feet of the location of
Weil No. 2. The. other pit that was explored and sampled was located on private
property, approximately 500 feet westerly of Well No. 3. Although large amounts
of trash and rubble were encountered in both pits, no significant concentrations of
TCE werefound in the material within the pits or in the soil immediately below the
pits. Based upon the results of this initial sampling the old clay pits can be dis-
counted as the prime source of TCE contamination.
The second potential source of the TCE contamination that was identified during
the preliminary planning was a former Douglas Aircraft facility located on the
comer of Olympic. Boulevard and Centinela Avenue. Information given this office
indicates that this facility was used as a solvent reclamation plant during the 1950's
and '60's. During this period TCE was very commonly used as an agent in industrial
solvents and degreaser which indicates that a large amount of solvent containing
PACIFIC SOILS ENGINEERING, INC.
December 11, 1980
Work Order 200984
Page 7
TCE may have been brought onto the property during its. uses by Douglas. A
chemical supply company currently occupies the facility, Information received
by this firm is that this company handles items containing TCE only in sealed
containers. Two {2) borings were drilled in the vicinity of this facility to
determine if it is the source of the contamination, The first boring drilled was
located in the center divider to Olympic Boulevard approximately 200 feet from the
subject facility, Laboratory test resulfis indicated a moderate concentration of TCE
in the ground water at this location with only low to insignificant concentrations
of TCE in the soil. Samples of the ground water in the second boring, located
within i5 feet of the subject facility produced laboratory test results of fi0 + parts
per billion of TCE which should be considered as a high concentration. This was
approximately 7,5 times any other concentration of TCE obtained during this first
phase of the investigation. This high concentration of TCE. obtained adjacent to
the facility would tend. to enhance the potential for this facility being the source
of the TCE contamination.
However, before it can be concluded with any degree of certainty that this
property and either Douglas or the present occupant are the source of the TCE
contamination, an additional amount of exploration, sampling and testing will be
required, The second phase of the investigation should thus be centered around
this location with the purpose of confirming or eliminating that this is the source of
PACIFIC SOILS ENGIN EEgING~ INC.
December 11, 1980
';fork Order 200984
Page 8
the. contamination. The additional work should include additional borings at
other locations around the perimeter of the property to eliminate the chance of
the high concentration that was encountered was not a localized pocket, as well
as additional borings adjacent to Well No. 3 to determine the effect that pumping
the well may have on the concentrations of TCE.
As indicated by the large loss of TCE encountered during the removal of the soil
from the glass sample vial, a large amount of evaporetiort of TCE takes place each
~` time the soil is handled. When only 47 percent of the amount of spiked TCE could
be recovered after removal of the sample from the vial in the laboratory, it would
lead to the beliefthan an additional amount of TCE is lostwhen thesample is taken
from the drive tube sampler and placed in the vial during the drilling and sampling.
Without knowledge of relative consistency of this loss, the concentrations of TCE
detected in the soil should be used in only a very rough analysis and should not
be interpolated asabsolute. In an effort to obtain as much information as possible
with available resources Phase II of the investigation should be centered around
detectable concentrations of TCE within the ground water.
~~• CONCLUSIONS AND RECOMMENDATIONS
1 . The South Branch of the Santa Monica-Malibu Coast Fault trends through
the target area in an east-west direction along approximately the alignment
of Olympic Boulevard.
PACIFIC SOILS ENGIN EERING~ INC.
December li, 1980
Work Order200984
Page 9
2. No evidence of the fault having an effect on the TCE contamination was
detected.
3. No evidence of significant concentrations of TCE originating from the old
clay pit/dump sites was detected.
4. The former Douglas facility at the comer of Olympic Boulevard and
Centinela Avenue should be classified as a potential source for the
contamination .
5. Additional sampling and testing around the perimeter of the Douglas
facility is necessary to confirm this site as a source of the contamination.
b. Concentrations of TCE detected within the soil samples should be used in
only very rough analyses. Actual concentrations of TCE within the soil
are probably higher by an unknown amount.
7. Additional sampling for the presence of TCE should be centered around
sampling and testing of ground water.
PACIFIC 5a1L5 EN GINEEAWG, INC.
December 11, 1980
Work Order 2009$4
Page 10
The findings and recommendations contained in this report are based upon the. specific
excavations, observations and laboratory test results as noted. The materials immediately
adjacent to or beneath those observed may have different characteristics, and no repre-
sentations are made as to the quality or extend of materials observed.
Respectfully submitted,
PACIFIC SOILS ENGINEERING, INC.
By:
AN LE CHWEITZEs
R.C.E. 28238
Distr.: ]0 -addressee
JSS:ISD/em
Reviewed by: / ~//, cam` /
LEONARD S. DEUTSCH, Vice President
R.C.E. 10432
PACIFIC SOILS ENGIN EERING~ INC.
BORING LOG
~ project: Sanfio Monica TCE Ground Water Study W O 200984
i
Boring Location Olympic S1vd.,1108 ±ft,W'ly Centinela Boring^• 1 Sheet 1 of 3
.- Sample ~ Date 9-4-80 BY JSS
c
;'
l
!Q f ~I SI ~' IAN I ~ Description ;: j
i
CL Lean Clay, medium brown, slightly dome, firm,
I Brick red at 2 + ft,
86~ ~ Dark brown at 9+ft.
c
CL Lean Clay, medium brown, very moist to moist, firm,
3 0.06 Very moist and mixture of dark gray and dark brown at 29 + ft,
Ground water at 34 + ft.
Stiff at 39 + ft, J
i,p4~ I Very stiff to hard, mixture of dark brown, dark gray and medium brown,
occasional black slate fragments to 1/4 inch size at 49 + ft,
ND
medium brown, moist, firm. .
Small amount of gray, very light red and very dark brown at 59 + ft.
PLATE 1
f; i
`~ ~ ~ ~ BORING LOG
Project: Santa Monica TCE Ground Water Study W 0 200984
+ 3oring Location Olympic 81vd.,1100 { ft.W'ly of Centinela
Boring 1 Sheet 2 of 3
Sample I
Date 9/d/80 ay JSS
~ $ a I
O Q v ~ ~ ',
'j~'"ISI ~ ~~~~ ~ DeSCriptioR ---
+CL ~ Lean Clay, as above.
Firm; thin lenses (1/4 + inch to 6 + inches thick) of black and dark brown
Gravelly Sand to 1 + inch size below 70 +ft. Sand is predominantly black
slate fragments to 1T4 inch size. 5 + percent slate fragments in clay below
70 + ft.
08t I .
.12
16~ ~ 15 + percent slate fragments and occasional thin streaks of dark~red brawn
at 99 + ft.
13I ~ Mixture of dark red brown, dark brown, dark gray, stiff, moist, 10 + % black
slate fragments to 3/8 + inch size at 109 + Ft.
p Predominantly dark red brown and dork gray with no significant slate
fragments at 119 + ft. PLATE 2
t w
t t
'~~l ~ ~. BORING LOG
~•~:,
Project: Santa Monica TCE Ground Water Study W 0 200984
Boring Location Olympic Blvd.,1T00±ft. W'lyof Centinelc~orinq^. 1 Sheet 3 of 3
Sample 9 4 80 JSS
Date.~_ By
~i
~ a o .
J }~".. o. ~ s ! G.
O'Q V V~ i
~cn Description
i'
r
Lean Ciay, as above.
F
13E
D ~ ' 3 + inch lens of Clayey Si It at 129 + ft.
0.07 Dark brown-with gray, occasional small .(1/8 inch maximum size) black
slate fragments at 139'+ft.
END OF BORIN G AT 150 + ft.
GROUND WATER AT 34 + Ft.
PLATE 3
BORING LOG •
~~~
Project: Santo Monica TCE Ground Water Study 200984
W.O.
' Boring Location Olympic B{vd„ 300± ft. W' ly of CenFinela
• Boring 2 Sheet 1'of 2
F Sample Date 9/3/80 By JSS
z
~ ~ o i
^ '
L J ~ G Na
O _Q V V ~ i
o "' ~ '- ~cn ~ Description
CL ~ Lean Clay, dark brown, very moist, firm,
t
0.1
2 - 0.11
Dark gray and rust brown, moist, very firm, slightly porous at 29 +ft.
3 -= N D
Ground water at 34 + ft.
1,7 SM Silty Sand, dark gray and dark brown, very moist to wet, dense, '
7,7
GP ~ Coarse Sandy Gravel, black, red, white and medium brown,
wet, 70 +percent grave! to 1 + inchsize, 1/2 of gravel is black slate
fragments.
6 0.69 80 + percent gravel at 59 + ft.
PLATE 4
BORING LOG
Project: Santa~Monica TCE Ground Water Study W.O.
Boring Location Olympic Blvd.,300 ± ft. W'ly of Centinela o,._:..,.^ 2 ~~ _ _
200984
7nf7
Sample
~ 9 3 80
~
//
Y JSS
Dafe
B
..
L
J ~
F ~
Q o
N~
v O .Q
~ V ~a
a " ' '' ~cn _ ~ Description
Coarse Sandy Gravel,as above.
~ 0.67 SP Coarse Sand, black and dark brown, wet, dense. ~
g 0.19 CL
Lean Clay, dark brown, moist,: very stiff.
9
0.1 SP
Gravely Sand, medium brown with black, moist to wet, dense,
6 + inch thick Tens of Lean C-ay at 94 + ft. ,
p .- 0.06
_-
END OF BORING AT 100 # feet
GROUND WATER AT 34 + ft.
PLATE 5 ~
i ~~ - ~ BOR-ING LOG -
Project: Santa Monica TCE Ground Water Study W ~ 200984
Boring Location Olympic Blvd„ 580±ft. W'ly of Steward St, - -
- Boring 3 Sheet I of 1
Sample Date 9/2/80 By JSS
..
" w Q o
L ~ ~ a. N~
a n "Q w v E
o "' s '- ~N - Description
CL Leon Clay, dark brown, damp, firm.
I
5 + percent black state Fragments at 19 + ft,
D -
M
D ~ ~ Slight increase in moisture dnd no significant slate fragments at 29 ft.
5 + percent black slate fragments to 1/8 + inch size at 40 ft,
.03
~.iayey Cana, meawm Drown, very m"oast,. moderatety dense,
5 + percent black slate fragments to 1/8 + inch size.
END OF BO~RIN G A7 50 + Ft,
NO GROUND WATER
PLATE b i
~' ? ~. BORiNG L4G -
_.
Project: Santa Monica TCE Ground Water Study W ~ 200984
Boring Location g~ly Corner Nebraska Ave. i?< Franklin St. - 4 ] of 2
] - Boring Sheet
~ Sample
-~ ~ Date 9/12/80 By JSS
~~ ,,
z ~ o
L J ~ O_ N.0
v
~ w
~ ~ N%
o ~~
CL
' Description
Lecn Clay, medium brown; damp, firm.
SP Gravelly Sand, light brown, black, medium brown and red, slightly
damp, moderately dense, 40.+percent gral {1/3 of which is black slate)
to ] + inch dize.
1
ND
fvledium brown and black; slightly clayey, slightly moist,
grave! to 2 + inch size. `
Lean Clay, medium brown, black and olive-brown, moist, firm, ]0 +percent
block slate fragments, thin lenses of Gravelly Sand with 40 +percent gravel.
Ground water at 34 + Ft.
Wet and very stiff at 39 + ft.
Thin lenses {3 + inches maximum thickness) of Silty Sand, Clayey Sand
and Grave! below 39 + ft.
PLATE
a
3
t
z
_T
i
k
. .~
'~~ ~ ~ BORING LOG
Pfaject: Santa Monica TCE Ground Water Sfiudy
Boring Location N'ly Corner-Nebraska Ave. 8~ Franklin Sfi.
Rnrinn 4
~y p 200984
ShocT 2 of 2
F Sample 9 12/80
JSS
~ ~ D
at e
BY
~ 4:G ~ p -
v O a ~ ~~
'
~- ,
N ~ ~~ Description
Lean Clay,. as above.
j
1
0
6
~ .
0
i m brown with 15 +
Medi
c
t bl
k
d d
k
d
l
t
f
t
t
. per
en
an
u
ac
ar
re
s
ragmen
a
e
s a
89 + Ft.
0.9 .
EN D OF BORIN G AT 100 + ft.
GROUND WATER AT 34 + ft.
PLATE 8 ,
,~
114
5
;~
j 61
~,
~"~_ ~ BORING LOG
Proiett: Santa Monica TCE Ground Water Study
Boring Location Water Division Maintenance Yard S
Rnrinrt
200984
W.O.
c~,vo* 1 of 2
Somple
9/8 80
JSS
gY
Date
c
~ z
~ a
a_ c
cn a '
v o a ~ ~~
o "' '~ ' '' ~cn _ Description
SC Asphalt Concrete over Aggregcte Base Material.
FILL: Clayey Cocrse Sand, black and dcrk brown, damp, firm, occasional '
piece of brick, lens of grcvel at 3 + ft. pieces of woad and wire beginning at 5 + ft
Malodorous and loose with 40 + percent wood at 9 + Ft.
I 80 + percent wood and paper below 10 + ft.
1
81 '
t . -_ I
. I
'0" 0.27 CL FILL: Lean Clay, mixture of red-brown, red, dark brown, olive-brown and I
medium brown, moist, firm, piece of wire.
0.2. SM Sil' ~ Scnd, medium brown and medium olive-brown with streaks of rust-brown
,
dark brown and black, slightly moist, dense.
0.0 CL Lean Clay, medium brown and medium olive-brown with streaks of rust brown
,
dark brown and black, stiff, moist.
i
0.2 Lens of Coarse Sand at 59 + Ft.
PLATE 9
-~- -_
._~ .
~~~, BORING LOG
Project: Santa Monica TCE Ground Water Study
Boring Location Water Division Maintenance Yard '
Soring 5
is
4V.0. 200984
4haP+ 2 of 2
Sample
9/8/80
JSS
Date
BY
i.
~~
6 j
C J ~ ~
E.W. Q.
. Q O
V) a -
O Q V NT
o
"' ~ '- ~cn Description
Lean Clay, as above.
i
SM Silty Sand, light brown, damp, moderately dense, strata location-and thickness
not definite. -- '
E
0.27 CL Lean Clay
medium brown and medium olive-brown with streaks of rust-brown
,
,
dark brown and black; stiff,. moist.
- _ 1
.32 SC. Clayey Sand, medium brown and rust brown, damp, dense, piece of reddish 1
tan shale in sample of 79 feet.
0.24 SP Gravelly Coarse Sand, orange and off white, moist, very dense.
Mixture of off white, black, red=brown and medium brown, slightly damp,
8 66 40 + oercent ravel to 3 4 inch size occasional slate
END OF BORING AT 100 + ft.
NO GROUND WATER.
PLATE 10 ~
,.~
-~ , . -
"~ ~ ~"~' ~ BORING LOG
,~
Projecl: Santa Monica TCE Ground V/ater Study W 0. 200984
' ~ Boring Location private orooerty southerly of Nebraska Ave
_:,_ Borin 6 S~ 1 of 1
Sample
4 eet
and W'ly of Centine.la Ave.
,^
Oate 9.11 80 gy JSS
~
t
~ ~.
F . ~
a O
to a
_
u O
o " Q
' ~ V
~' N~
~cn
~ Description
CL FILL: Lean Glay, dark and medium brown, slightly moist, firm, occasiorai
brick fragment.. -
l .30 Mixture of light brown, dark brown, black-white, and tan,
pieces of glass, brick and slag.
p ' = 04
.
0.03 Black and gray, wet, soft,-
Ground Water at 29 + ft.
0.45 CL Lean Clay, medium brown, gray and dark brown, wet, slightly firm.
Lens of sand at 39 +ft.
END OF BORIN G AT 49 + ft.
GROUND VdATER AT 'r9 T ft.
_ PLATE 11
t
s
~_
-~~.
~J
BORING LOG
%roject: SANTA MONICA TCE GROUND WATER STUDY
;oring Location Northerly Side of Olympic Blvd. and
8orina ~
fir, p, 200984
cnoo+ 1 of 1
I Sample 300 ft. easterly of Centinela Ave. Dat e l i~i8/80 By JSS
c a
rl~ ~ a_
~ a u o
Nd
v~
-
` ~
..I ~ +- ~N Description
L lean Clay, dark brown, moist to very moist, soft.
•01 Moist with occasional black slate fragments to 1/8 inch size at 9. ft.
i
j .06
.
.OS Mixture of gray-brown and rust-brown, very firm, very moist to wet,
slightly porous at 29 + ft.
Ground Water at 34 + ft.
.22
_:.: 0
5 '
.
Clayey Sandy Gravel, dark brown and black
moist to wet
firm
2 ,
,
.
END OF BORING AT 50+ft.
GROUND WATER AT 34 + ft.
PLATE 12
0
;o
eo
40
so
~o
Go
r~
no
120
130
140
!~
`~ ~ a
a 3
SGALE V i" =21J'
i„ 20~'
3d
u7
l~
~~p~
2.00'
~F
~ UC)
o~
F
7
~ . _~ -'_
U
2 J
a~
~~
GL
~.8~
M~ ND
eL
O.OCo
4 2,Co -W
1.04
ND
O. 2.10
0.08
O.i2
O. (!o
O.i3
~ D
1.1D
O- 07
0.07
#'~
0
m
GL
OLO Ca.oY ~.'A
PiT
0.04-
~ _ U03 _~
o. a~
GL
O.OS
0.2i
GL 4.py
~`
~1D
_ ~ ,~ ~ ~~
a fK
~ _ _
m S ~
GL C~..
OLO C+.ov 0.~ 0.2b _
PIT
o. oa- r. 07
Sp
~ _ ,0.0.3_ c1.. 0.1~
--~.7_e
0.4yu 4.03 ~7- TAME OF pp~LLi~G
'J
GL ~l~- W
0.05 O.Z2
. ~ O. (o Z.
I
._ _ - ..
0.10
I
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