HomeMy WebLinkAbout265 SAN JACINTO_ 251-89 (16)N. 4232 -005 -
antic Richfield Company
t y 15, 1987
1'.ige 3
pies were collected at approximately 2 feet below the upper surface of
the backfill. Sampley could not be collected from depths greater than
this due to the caving difficulties which were encountered during
advancement of the hole. Samples were collected from the lower end
of the hand auger. This material was then placed into a clean, mason
jar for storage. Prior to sealing the jar, our geologist on -site
described the material type and determined the presence of ambient
odors of petroleum 'products being emitted from the sample. A descrip-
tion of these characteristics of the sample are included on the
attached chain of custody form (Exhibit 7).
Upon completion of the evaluation, each mason jar was sealed and
taped shut. An appropriate label was affixed to each container prior
to placement into cold storage until delivery to the laboratory.
The sample tubes from the boring were sealed by placing aluminum
foil over the open ends of the tube, held in place with a tight - fitting
plastic cap and the cap taped to the tube. An appropriate label was
affixed to each of these containers prior to placement into cold stor-
age for delivery to the laboratory. At all times during the sampling,
handling and storage, samples were under the direct custody of our
representative on -site. Chain of custody forms include all samples
collected and the signature of the laboratory representative receiving
the samples, thereby releasing our custody. These forms are
attached as Exhibits 7 and 8.
Prior to advancement of each ltor9ng, all drilling equipment was
decontaminated with the ure of pr.ssurized hot water. Between each
sample drive, the California modified split -spoon sampler and steel
inserts were decontaminated with the use of a TSP solution scrub and
double rinsed with distilled water.
During advancement :f the borings, drilling cuttings were generated
on -site. This material was collected and stockpiled in a fenced area
of t o facility and covered with plastic sheeting to await charac-
tr, i:..jtion. The characterization wil, determine if contaminants are
present and special handling is needed,
RESULTS
The results of the evaluation of the soil samples during drilling
indicated the presence of ambient odors and low concentrations of
volatile organic vapors identified with the h.nu meter within Bel -2 at
a depth of 13 to approximately 21 feet when the boring encountered
refusal on dense bedrock materials. Concentrations of organic vapors
in this boring ranged from 0 to a peak of 20 parts per million (ppm).
Distinct odors were identified specifically at a depth of 13 to 14 feet.
All other samples collected and drilling cuttings evaluated from the
J.N. 4232 -005
Atlantic Richfield Company
May 15, 1987
Page 4
borings and hand -auger samples on -site indicated the absence of
ambient odors of petroleum hydrocarbons in concentrations exceedin;,
1 ppm on the referenced meter.
The chemical analysis indicated all identifiable, nonhalogenated volatile
organic compounds using the modification of EPA Test Procedure 8015
were in the nondetectable range. Detection limits are indicated on
the chemical analysis attached as Exhibit 9.
Analyses of selected soil samples, using EPA Test Procedure 8020,
determined the presence of aromatic volatile organic compounds in
detectable concentrations. Specifically, these compounds were within
borings BH -1 and BH -2 at depths of 14.0 to 14.5 feet and 13.5 to
14.0 feet, respectively. The concentrations detected, however, did
not exceed state action levels for the compounds identified. Addi-
tionally, the total concentration of gasoline did not exceed detectable
concentrations.
CONCLUSIONS AND RECOMMENDATIONS
Based on the chemical analyses performed and the on -site evaluation,
it has been determined that slight soil contamination has apparently
been generated and is present along the west side o, the excavation
f the three -tank cluster in the area of BH -2. However, the contamina-
tion is below state and county action levels which have been desig-
nated for mitigation as shown on Exhibit 10. All other borings drilled
adjacent to or below the underground gasoline tanks and waste oil
tank and the samples collected above the three -tank cluster in the
backfill material indicated the concentrations of contaminants were in
the nondetectable range.
Within the borings drilled, dense bedrock materials were encountered
at approximately 17 to 71 feet below the ground surface. The mate-
rial consisted basically of granodiorite to granite, increasing in fresh-
ness with depth. On the contact between the overlying alluvial or
tank backfill material and the dense bedrock, no perched water was
identified at the time of drilling. A temporary PVC well was installed
at the location of BH -1 during the time drilling activities occurred to
establish if perched water was present at that location to the bedrock
interface. No water was identified within this temporary well.
During the initial ? ivancement of BH -1 which was located approxi-
mately 2.5 feet southwest of the boring shown on the plot plan, a
large void was encountered. This void measured approximately 5 feet
in depth with an unknown width and length. The upper surface of
the void was encountered at approximately 2.5 feet below the ground
surface. The void appears to be related to the underground tank
excavation or possibly to some soil piping phenomenon. No evidence
J.N. 4232 -005 -
Atlantic Richfield Company
May 15, 1987
Page
of a liner associated with underground conduit, such as, a storm
drain, was identified. The exact limits of this void were not deter-
mined by our investigation. Upon encountering this void, a plywood
cover was placed over the hole and the appropriate individuals noti-
fied of its presence. Due to the size of the void and the unavail-
ability of soil, the void was not backfilled.
The location of the void is indicated on the attached plot plan. It
appears to be an unsupported cavity; hence, vehicular traffic could
cause the void to collapse. It is recommended that, during the
excavation for removal of the tanks referenced above, the extent of
this void be identified and mitigation of its presence be performed to
preclude the possibility of collapse due to surcharging the surface by
traveling vehicles.
SUMMARY
Basically, no soil contamination warranting mitigation was identified bythefourhollow -stem auger borings and six hand -auger samples
collected surrounding the underground tanks at this facility. It
should, however, be anticipated that some minor contamination may be
present in the backfill surrounding the tank directly below the fill
points or other locations at this site. However, no large extent of
contamination was Identified by our work. Additionally, the void
encountered south .f the tank excavation, as indicated on the plot
plan, should be mitigated to preclude its impact on future develop-
ment.
It is our recommendation that, during the actual demolition and removal
of the tanks on -site, inspection be performed to verify the results of
this report. On -site inspection of the void and recommendations for
its mitigation could be developed at that time.
It is our hope that the information we have provided above is suffi-
cient for your needs at this time. Should you have any questions
concerning the scope of our work or our findings, please feel free to
contact this office at your convenience.
Respectfully,
PIONEER CONSULTANTS
Kyle D. Emerson, CA G. #1271
Project Geologist
KDE:Ijs
Addressee (2)
Attachments
cc: Mr. Joe Tully
Mr. Ken Lanz
BORING SUMMARY NO.
BH -5BORINGSUMMARYNO.
1311-4
ELEVATION: DATE DRILLED:
y
of `'"- ?y 14 °F y °S T MATERIAL DESCRIPTION
8 °y
k' v Q°
Co C` MATERIAL DESCRIPTION
i
Ow'
2 yr m`wQ4w 4`x oQ'v'
SN Silty sand, fine to medium looseSNSiltysand, fine to medium, loose moist brown
1 trace of gravel, slightly
slightly plastic
2 SPT 6
2
plastic
3
2 R
R 7 10.1 105.0
4 R 18 1
3
114.1
very
moist
5
44 14
NO GROUNDWATER ENCOUNTERED
medium
SPT 5 Trace of fine gravel, fine to
7
5
coarse
66
9
7
10
11
7
B
SP
12
dense moist
8
9
13
to coarse gravel
9
10
62
15
10
11
1
16
medium
17
With cobbles
dense
18
12
19
12
13
20
13
14 R 76 10.2 Sand, w /little silt, trace of
22
14— SPT 54
23
fine gravel
1515
24
NO GROUNDWATER ENCOUNTERED
16
REFUSAL AT 14.5 FEET
16
SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Building EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California NUMBER
prepared for Devenplus Corporation 6
SP Sand, fine to coarse, with
18
light
17
19
gravels brown/
20
gray
18
22
19 SPT 22
23
20
24
25
110 GROUNDWATER ENCOUNTERED
21
SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Building EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California
REFUSAL AT 2C.0 FEET
22
7
Schaefer Dixon Associates JOB NUMBER: 9134513A
23
24
25
SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Builoing EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California NUMBER
prepared for Devenplus Corporation
Associates
Schaefer Dixon JOB NUMBER: 9134513A
BORING SUMMARY NO.
BH -5
ELEVATION: DATE DRILLED:
1 p=
y
of `'"- ?y 14 °F y °S T MATERIAL DESCRIPTION
8 °yt .} 4. J• ,p 4w
04$ O 4 v
0 2' yv OvQty Q.k OQO•
QQi4ax'
J2Gv
Q 4 v CQ
4` if
OQ 104w4at
SN Silty sand, fine to medium loose moist brown
1
1 trace of gravel, slightly
2 SPT 6
plastic
3
2 R 14 12.4 117.2
4 R 18 1 13.2 114.1
very
moist
5
4 SPT 14
NO GROUNDWATER ENCOUNTERED
medium
TOTAL. DEPTH OF BORING 4.5 FEET
ti
dense
7
8
6
9
10
11
7
SP
12
dense moist
8
13
to coarse gravel
9
14
62
15
10
1
16
17
With cobbles
18
19
12
20
13
21
22
14— SPT 54
23
15
24
NO GROUNDWATER ENCOUNTERED
25
REFUSAL AT 14.5 FEET
16
SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Building EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California NUMBER
prepared for Devenplus Corporation 6
Associates
Schaefer Dixon JOB NUMBER: rr9Rr,13A
BORING SUMMARY NO.
BH -6
ELEVATION: DATE DRILLED:
Sr MATERIAL DESCRIPTIONP goy
4r O i Q 4` yQ4 v CQ
4` if
OQ 10 4w4at
SN Silty sand, fine to medium, loose very
1 trace of gravel, slightly moist
plastic
2 R 14 12.4 117.2
3
4 SPT 14 medium
dense
5
6
7
SP Sand, fine to coarse, with fine dense moist
8
to coarse gravel
9 SPT 62
10
With cobbles
11
12
13
14— SPT 54
15 NO GROUNDWATER ENCOUNTERED
REFUSAL AT 14.5 FEET
16
17
18
19
20
21
22
23
24
25
SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Building EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California NUMBER
prepared for Devenplus Corporation 7
Schaefer Dixon Associates JOB NUMBER: 9134513A
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9
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v 2B1 166
SIT E :LOCATI, N
df 4
16
Ref: U.S. GEOLOGICAL SURVEY 7.5 MINUTE TOPOGRAPHIC
QUADRANGLE ELSINORF SHEET 1953 ED. (PR 73)
LOCATION MAP
ErApgo ey: KDE SUBSURFACE EVALUATION *!8
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LAKE ELSINORE SITE
K9cx99 By: KDE FOR ARCO PETROLEUM PRODUCTS
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Pioneer Consultants cowsuffififffiglAvers one Geologists
FORM NO 265 ICOD
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BORING SUMMARY NO.
UH -7
ELEVATION: DATE DRILLED:
oJO =h4`' f,
C °= h +r MATERIAL DESCRIPTION
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Asphaltic concrete, fine to loose dry black
1
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2– R 16
3
4 SPT 11 SM Sand, fine to medium, trace of medium noist brown
gravel dense
5
6
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9 R 15 5.8 109.0
10
11
1111
12
11..11
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13 SPT 50 for
14
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17
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SPT - Standard Penetration Test
R - 2.5 I.D. Ring Sampler
Proposed Commercial Building EXHIBIT
San Jacinto and Casino Drive, Lake Elsinore, California NUMBER
prepared for Devenplus Corporation
8
Schaefer DixonAssociates JOB NUMBER: 91'.4513A
MAXIMUM DENSITY - OPTIMUM MOISTURE DETERMINATION
Test Maximm Optinun
Sample Depth Dry Density Moisture
Lo -lion [feet] coil Description (P -c-f.1 (percents
811-3 3.0.9.5 Well graded brown silty sand 134.8 8.3
w /gravels
The maximum density was determined in accordance with ASTM D1557
SIEVE nNALYSIS
Test Percent Passing Individual Sieve
Sample Depth
Location feet 94 910 920 040 9100 #200
OH-3 1.0.2.5 100 97 87 74 46 29
BH -6 3.0-4.5 100 98 92 85 56 30
PLASTICITY INDEX
Test
Sample Depth Liquid Plasticity Classification
Locat ion (feet) Limit lndea O,A.S.H.T .O. Unified
BH -3 1.0-2.5 nonplastic
BH -6 3.0.4.5 23 4 A-2 -4 (0) SM
R" VALUE
Moisture Moisture
Test Content Exudation Dry Expansion
Sample Specimen Depth Conpaction Pressure Densi i
Pressure Stabilometer
oration Number (feet) Percent fil it "R" Value
DH -5 1 1.0.4.5 11.2 76 124.4 0 58
2 9.4 191 127.4 0 75
3 8.5 481 129.1 9 84
4 8.9 242 127.9 0 81
R" Value at Equilibrium
Sample "R" Traffic
Location yalue Ind"
811-5 81 4.Ot
Schaefer DixonAssociates
GEOTECHNICAL ENGINEERS
Redlands, Calilornia
DATE 4 -21 -89 JOB NO. 9R4513A
SCALE EXHIBIT 9
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0 1 2 3 4 5 6
NORMAL PRESSURE— KIPS / SO. FT.
EXCAVATION NO. 4 DEPTH: 2.0 -2.5 feet
IN –SITU MOISTURE TEST
PEAR RESIDUAL
0 = 31° 31°
C = 150 psf 100 psf
DI RECT SHEAR TEST DATA
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PROJECT: EXH I B I T
Associates
Schaefer Dixon
JOB NO.;
9R4513A
DATE:
4 /89 REULANDS r CALtrURNIA 10
FORM 132
O 6.b 13
SCALE (foot)
San Jacinto River Rd.
r.cr co sr:
M-
jam` Waste Oil Tank
ARCO Petroleum Product* Compan;
Building. '
oL _ 13 12
Islands
I — : L
O 13 O C]
rtLLICIL'tL/ - --
Planning Dept,
SUBSURFACE EVALUATION TO DETERMINE THE PRESENCE AND
CONCENTRATION OF PETROLEUM HYDROCARBON CONTAMINATION
Abandonment of ARCO Gasoline Station
Lake Elsinore Area, California
i
i
J.N. 4232 -005
May 15, 1907
for
Atlantic Richfield Company
17315 Studebaker Road
Cerritos, California 90701
prepared by
Pioneer Consultants
251 Tennessee Street
Redlands, California 92373
pioneer consultants
251 TENNESSEE STREET • REDLANDS, CALIFORNIA 92373 • (714) 7932691
J.N. 4232 -005
May 15, 1987
Atlantic Richfield Company
17315 Studebaker Road
Cerritos, California 90701
Attention: Mr. Joe Tully
Re: Abandonment of ARCO Gasoline Station
Northwest Corner, San Jacinto River Road and Casino Drive
Lake Elsinore Area, California
Subject: Subsurface Evaluation to Determine the Presence and
Concentration of Petroleum Hydrocarbon Contamination
Gentlemen:
At the request of Mr. Joe Tully, we have performed a subsurface
investigation to establish the extent and concentration of petroleum
hydrocarbon contamination possibly associated with four underground
motor vehicle fuel tanks at the referenced location. It was the intent
of this study to establish if soil contamination warranting mitigation iS
present at representative sampling locations in the backfill and
natural materials surrounding the tanks. This information will then
be used to estimate construction costs for the proposed abandonment
program. It is our understanding that these tanks will be abandoned
soon after the submittal of this report.
CITE 1 nrATinm
The site under investigation is located at the northwest corner of
San Jacinto River Road and Casino Drive in the Lake Elsinore area of
Riverside County, California. More exactly, the site is located in the
SWJ of the NW{ of the SEI of Section 9, T6S, R4W, S.B,B.M. as can
be located on the U.S. Geological Survey, 7.5- Minute Elsinore Topo-
graphic Quadrang!e, 1953 edition (PR 1973). Exhibit 1 shows the
referenced information.
SITE DESCRIPTION
The site is an abandoned ARCO gasoline Station. The area sur-
rounding the old pump island= anti Mini -Mart building is fenced with
chain link. The entire ground surface is covered with either asphalt
paving in the parking areas or concrete decking within the pump
islands and over the underground storage tanks. At present, there
are four underground motor vehicle fuel tanks located at this facility,
as indicated on the plot plan attached as Exhibit 2. They consist of
J.N. 4232 -005
Atlantic Richfield Company
May 15, 1987
Page 2
three 12,000 - gallon gasoline tanks and one 550 - gallon waste oil tank.
Located within the parking area and adjacent to the ARCO Gasoline
Station is an existing real estate office building, fronting Casino
Drive, also shown on the attached exhibit.
BACKGROUND INFORMATION
It is our understanding that the ARCO Gasoline Station is proposed to
be demolished as a result of the relocation of this facility one block
east at the intersection of Casino Drive and Railroad Canyon Road.
During the demolition, the underground motor vehicle fuel tanks will
be removed by excavation and appropriately handled and disposed of
following current specified procedures. It was the intent of our work
to establish if the backfill surrounding the tanks and the adjacent
natural soils have been contaminated by either tank leakage or over-
filling of the fill lines. This assessment is to be used to establish
the volume of soil anticipated to be removed and handled as hazardous
materials during dem0ition.
The project was discussed in detail with Mr. Ken Lanz, project engi-
neer with ARCO Petroleum Products. The work plan which was
developed between our representative and Mr. Lanz is presented
below for review.
INVESTIGATIVE PROGRAM
To establish the presence and relative extent of contamination, four
hollow -stem rotary flight auger borings were drilled adjacent to the
motor vehicle fuel tanks at this site. The plot plan referenced above
indicates the locations of these borings with respect to the tanks.
During advancement of these borings, undisturbed soil samples were
collected at approximately 5 -foot intervals with the use of a California
modified split -spoon sampler. The sampler was sleeved with 6 -inch
long steel inserts which were used to retain the samples for chemical
analyses.
During advancement and sampling, all samples collected and the
drilling cuttings were evaluated by our certified engineering geologist
on -site for development of the soils logs which are attached as Exhib-
its 3 through 6. Additionally, the concentrations of volatile organic
vapors were measured with the use of an h.np PI -101 photoionization
analyzer. The results of this analysis are included on the boring
logs.
In addition to the samples collected from the borings, bulk samples
collected at discrete intervals) were obtained from hand -auger holes
within the backfill beneath each turbine box and at approximately
3 feet south of the fill point for each underground tank. The Sam-