DSHW-2018-004642 - 0901a068808277a7

Chevron
MN.
John Amato Project Manager Refining Business Unit Chevron Environmental Management Company 324 W. El Segundo Blvd. (MO-133)
El Segundo, CA 90245 [phone] [e-mail]
DOI e Manarprnent
May 17, 2018 Rad:3tion Contmi
Mr. Scott Anderson !via 2 2 2018
Division Director
Division of Waste Management and Radiation Control
Utah Department of Environmental Quality
195 North 1950 West
P. O. Box 144880
Salt Lake City, Utah 84114-4880
RE: LNAPL Investigation Summary Report
Chevron Products Company, Salt Lake Refinery, North Salt Lake, Utah
Dear Mr. Anderson:
I have attached a report prepared by our consultant, Earthfax Engineering, LLC., that summarizes efforts
thus far to investigate the presence of non-aqueous phase liquid (NAPL) in a well (S-18A) discovered
during groundwater monitoring activities in 2017. The source of the NAPL is believed to have been a crack
in the nearby oily-water process sewer. The crack has been repaired and efforts to remove the NAPL from
the well are ongoing. Chevron will report any future activities related to the NAPL through the annual
update reports.
Please contact me at [phone]/[e-mail] with any questions.
Sincerely,
ohn Amato
Project Manager
Chevron Environmental Management Company
Cc: Hao Zhu, Utah DEQ (email only)
Keith Rittle, Trihydro (email only)
Christina King, Chevron SLR (email only)
Dv c'`Nr,st.: Mnag.arnent
and Rad:atnn Coiltroi
MAY 2 2 2018
Well S-18A LNAPL Investigation -V7U14/-200-00461-i
Summary Report
Chevron Products Company
Salt Lake Refinery
Salt Lake City, Utah
Chevron Environmental Management Company
San Ramon, California
May 2018
=AZ
trAersky M I
ktigh
EarifFax EarthFax Engineering Group, LLC
Engineers / Scientists
www.earthfax.com
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
TABLE OF CONTENTS
Section Page
CHAPTER ONE INTRODUCTION 1-1
CHAPTER TWO FIELD INVESTIGATION 2-1
CHAPTER THREE RESULTS AND CONCLUSIONS 3-1
3.1 Observations During Boring Advancement 3-1
3.2 Soil and Groundwater Sample Analyses 3-2
3.2.1 Soil Sample LCO-2, 4.6' — 5.6' 3-2
3.2.2 Groundwater Sample LCO-3 3-2
3.3 Sewer Line Repair and Blockage Removal 3-2
3.3.1 Isolation of LNAPL in Gravels Near S-18A 3-2
3.3.2 Source of LNAPL 3-2
3.3.3 Discovery of Plugged Sewer Line 3-3
3.4 Monitoring Fluid Levels in S-18A 3-3
TABLES
Table 2-1 Summary of June 28, 2017 Purge 2-1
Table 2-2 Summary of LNAPL Measurements in Well S-18A 3-3
FIGURES
Figure 1-1 Site Map with Areas of Investigation
Figure 2-1 Temporary Piezometer and Monitoring Well S-18A Location Near 300 N.
and 300 W.
APPENDIX
Boring Logs with Piezometer Completion Details and Laboratory Analytical Results
ii
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
CHEVRON SALT PRODUCTS COMPANY AND EMC
CHEVRON SALT LAKE REFINERY
WELL S-18A LIGHT NON-AQUEOUS PHASE LIQUID INVESTIGATION
SUMMARY REPORT
CHAPTER ONE
INTRODUCTION
This report presents the results of an investigation initiated in response to the June 2017
measurement of Light Non-Aqueous Phase Liquids, ("LNAPL") at Well S-18A, in the Southwest
Tank Farm at the Salt Lake Refinery ("Refinery") in 2017. Figure 1-1 shows the operating
portion of the Refinery with outlines of the areas that were investigated.
1-1
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
CHAPTER TWO
FIELD INVESTIGATION
After the June discovery of LNAPL in S-18A, Chevron directed EarthFax to purge the
well of fluids and establish whether the LNAPL thickness would dissipate. That effort was
conducted on June 28, 2017 using a vacuum truck. The LNAPL thicknesses on the 28th were
measured prior to purging, after each purging event and upon completion after allowing time for
fluid levels to equilibrate. The observations are summarized on Table 1.
TABLE 2-1
SUMMARY OF JUNE 28, 2017 PURGE
PURGE EVENT DEPTH TO LNAPL (ft.) DEPTH TO Water (ft.) LNAPL THICKNESS (ft.)
Pre-Purge 6.32 6.63 0.29
Purge 1 Deep to Purge Only Water 6.94 N/A
Purge 2 7.31 7.56 0.25
Purge 3 7.56 7.93 0.37
Post Event 7.80 8.55 0.75
Overall, 35 barrels of total fluids were purged through the 12.8—ft. long slotted casing in
well S-18A. The end result of this effort is that the LNAPL thickness was 0.46 feet greater than
before the purge. Considering the 2-inch well casing diameter, the fluid column height in the
well, aquifer characteristics and the 35 barrels purged, it was very apparent that there must be a
nearby source of LNAPL that was in direct communication with the well.
Based on the results of the purge event, an excavation was made on June 30, 2017
adjacent to the double vault just 9-feet west of well S-18A (Figure 2-1). The trench exposed two
subsurface conditions that explain the high volume of water purged through the well and the
increase in LNAPL as the well was purged. Specifically,
• Several cubic yards of coarse, two to three-inch diameter angular gravel that was
installed to support the pre-cast sewer vault extended six to twelve feet to the north
and east from the vault.
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Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
• It was visually apparent that this gravel was in direct communication with the sand
pack around the slotted casing in S-18A.
Chevron had EarthFax conduct a shallow aquifer investigation which included
installation of several small diameter borings completed with one-inch piezometers in the vicinity
of S-18A and the excavation around the vault (Figure 1-1). A total of six temporary piezometers
were installed during the investigation. The investigation methods, sampling procedures and
post-installation LNAPL measurement procedures are described below.
EarthFax mobilized on August 17, 2017 with the drilling contractor. The Direct Push drill
rig began by advancing boring DP-1 in the area north of the referenced excavation along 300
West Street. Additional borings LCO-1, 2 and 3 were advanced to the south in the immediate
area of well S-18A, the vault and the storm sewer line (Figure 2-1). The last two borings,
identified as DP-88 and DP-90 were installed in the North Tank Farm.
Monitoring During Boring Installation. All borings were installed following conventional
environmental methods. This included measuring collected soil samples using a Photo-
Ionization Detector ("PID") to measure total volatile organic vapors ("VOCs"). Elevated
PID readings suggest the potential presence of hydrocarbons. Detailed logs of each
boring are provided in the appendix to this report.
Soil Sample Collection. Soil samples were collected into laboratory supplied jars from
the depth intervals noted on the logs. After reviewing the logs and PID measurements
for each boring, the sample LCO-2 at the 4.6 — 5.6 foot depth interval was selected for
laboratory analysis. The sample was delivered under chain-of-custody to American
West Analytical Laboratory ("AWAL") in Salt Lake City on the day of collection. The
requested analysis was for benzene, ethylbenzene, toluene, xylenes and naphthalene
("BTEX-N") with gasoline range organics ("GRO") using EPA Method 8260 and diesel
range organics ("DRO") using EPA Method 8105.
Piezometer Completion. Each boring was completed as a piezometer to allow future
measurements of both water level and LNAPL. Completion details are presented on the
boring logs in the appendix. After installation, the piezometers were purged of
approximately three casing volumes of groundwater and left for several hours to allow
the groundwater elevation and LNAPL to equilibrate.
2-2
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
Water Level and LNAPL Measurements. Late on August 17th and again on the 22nd,
each location was measured using an interface probe certified to detect thicknesses of
0.0312-inches (0.8 mm) or greater. No LNAPL was detected in any of the piezometers.
Collection of Groundwater Quality Samples. After measuring the depth to the
groundwater surface at each location, a dedicated bailer was used to collect a
groundwater sample from piezometer LCO-3. The sample was delivered to AWAL with
the soil sample from LCO-2 with a request to analyze for the same methods specified for
the soil sample.
To monitor the effectiveness of the Stormwater Sewer repair and removal of LNAPL
from the subsurface, a measurement was made in well S-18A on December 5, 2017. At that
time, 1.18-feet of LNAPL was measured on the groundwater surface in the well. On April 23,
2018, 1.00-feet of LNAPL was measured in the well.
During the first quarter well S-18 was purged using a vacuum truck to remove LNAPL
present in the well. Additional action will be taken and fluid levels will be monitored to see if the
LNAPL attenuates.
2-3
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
CHAPTER THREE
RESULTS AND CONCLUSIONS
This chapter addresses the observations made during the advancement of the borings,
subsequent LNAPL measurements for both events and the analytical results of the soil and
groundwater samples collected from LCO-2 and 3, respectively.
3.1 OBSERVATIONS DURING BORING ADVANCEMENT
As discussed in Chapter Two, borings were installed and completed as temporary
piezometers at the locations shown on Figure 2-1. From field observations and the logs
generated for each boring, the following general statements can be made.
• In borings DP-1, LCO-1, 2 and 3 in the area around the exposed storm sewer and
well S-18A, there were no indicators of hydrocarbons observed in the soil, including
no detection of VOCs by the PID. There were elevated vapors in both borings at the
North Tank Farm. However, those readings are consistent with other samples in that
tank farm.
. In the area around the storm sewer there were no organic vapors measured
emanating from the completed borings at the ground surface prior to installation of
the PVC casing, sand pack and bentonite seal.
• There was no measureable LNAPL in the piezometers when measured on August 17
and 22, 2017
3.2 SOIL AND GROUNDWATER SAMPLE ANALYSES
As noted above, the soil and groundwater samples were analyzed by AWAL. The
laboratory report is provided in the appendix to this report. In summary:
3-1
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
3.2.1 Soil Sample LCO-2, 4.6' — 5.6' - Only Diesel Range Organics was detected at
25.2 mg/kg — dry. This concentration in soil from the shallow horizons at the
Refinery does not suggest a release to or from the groundwater.
3.2.2 Groundwater Sample LCO-3 - There were no detections of volatile organics in
the groundwater sample.
3.3 SEWER LINE REPAIR AND BLOCKAGE REMOVAL
3.3.1 Isolation of LNAPL in Gravels Near S-18A
Based on the field observations and laboratory results of samples collected during this
investigation, there was no indication that the LNAPL discovery in the storm sewer was
contributing to or influenced by pre-existing contamination of the groundwater in the area near
well S-18A and in the North Tank Farm.
The upper soil horizons logged in the August 2017 borings show a very uniform
distribution of fine-grained silty and clayey soils with occasional traces of fine sand making up
the stratigraphic profile. Looking at the log for S-18A, which is only 4-6 feet from the storm
sewer trench and vault presents an entirely different profile. The stratigraphy in the upper six-
feet of well S-18A consists of silty sand with gravel, grading to medium dense silty sand to about
twelve-feet. It is not until below twelve-feet that fine-grained soil appears on the log. The silty-
sands, sands and gravels in S-18A have much higher hydraulic conductivity, allowing the
LNAPL to travel through the subsurface on the groundwater at a much faster rate. The coarse
sands and gravels observed in the excavation by the sewer vault adjacent to S-18A create a
direct link with the sand pack around the slotted casing in S-18A. This continuity of coarse
grained, highly permeable material explains how the LNAPL entered S-18A.
3.3.2 Source of LNAPL
Several days after the subsurface investigation was completed, Chevron personnel
extended the excavation around the storm sewer adjacent to S-18A to the north exposing a
horizontal crack in the corrugated metal pipe. The flow of LNAPL from the sewer into the
3-2
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
coarse gravel towards the sand pack around S-18A was visible in the open excavation. The
impacted area was limited because highly permeable gravels around the vault and the sewer
line were contained within a small basin excavated into the low permeability fine grained soils
when the new vault was installed in 2002. The fine grained soils were encountered in
continuous beds in borings LCO-1, 2 and 3.
3.3.3 Discovery of Plugged Sewer Line
In late July 2017, after Chevron had completed repairs on the Storm Sewer by S-18A,
they hydro-jetted a long section of the Oily Water Sewer that included the lines directly south of
S-18A on 300 North Street. With those lines cleared, normal flow was re-established to the
wastewater plant and the LNAPL that had backed up into the storm sewer adjacent to S-18A
flowed normally. The approximate area of the plugged line is shown on Figure 2-1.
3.4 MONITORING PLAN FOR FLUID LEVELS IN S-18A
Following purge events, fluid levels in S-18A will be measured after allowing 24-hours for
fluids to equilibrate. Table 2 below provides a summary of LNAPL measurements to date in well
S-18A.
TABLE 2-2
SUMMARY OF LNAPL MEASUREMENTS IN WELL S-18A
Date
Depth
To LNAPL (ft.)
Depth to
Water (ft.)
Measured
LNAPL (Ft.) Comments
6/7/2017 6.29 6.31 0.02
6/28/2017 6.34 6.63 0.29 Pre-Purge
6/28/2017 7.80 8.55 0.75 Post Purge
9/26/2017 6.66 7.12 0.46
12/5/2017 6.65 7.83 1.18
1/25/2018 6.60 7.80 1.20
2/23/2018 6.20 7.20 1.00
3-3
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
TABLE 2-2 (Continued)
SUMMARY OF LNAPL MEASUREMENTS IN WELL S-18A
Date
Depth
To LNAPL (ft.)
Depth to
Water (ft.)
Measured
LNAPL (Ft) Comments
3/23/2018 6.10 7.02 0.92 Post Purge Reading
3/27/2018 6.25 7.25 1.00 Post Purge Reading
4/11/2018 7.14 8.10 0.96
4/23/2018 6.52 7.52 1.00
3-4
Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
FIGURES
C C
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DR APP
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= SCALE •200' DATE 04-2018 FIGURE 1-1 I/U
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LNAPL NVESTIGATION - SUMMARY REPORT SITE MAP WITH AREAS OF NVESTIGATION
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1—INCH TEMPORARY PIEZOMETER (M IDA ENGR
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Cheron Clevron Products Compaq IWO Salt Lake Refinery
LNAPL INVESTIGATION — SUMMARY REPORT TEMPORARY PEZOMETER AND MONITORNG WELL S-18A LOCATION NEAR 300 N AND 300 W
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Chevron Products Company and EMC LNAPL Release Investigation
Salt Lake Refinery Summary Report
May 10, 2018
APPENDIX
Boring Logs with Completion Details
and Laboratory Analytical Results
Surface
Elevation
4214.8 Wa
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1
2
3
SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry,
dense ...Background PID 0.0 PPM
...PID 0.0 PPM...
SILTY CLAY/CLAYEY SILT: It. olive gray, damp, firm
...grades with more clay...
...PID 0.0 PPM...
...grades sandy - saturated at 2.8-ft...
....grades slightly more brown and moist to wet...
...PID 0.0 PPM...
SILTY SAND/SANDY SILT: Dk. olive, wet-saturated, med. dense
...grades with finer sand...
...PID 0.0 PPM... ...Boring completed at 12.0 feet...
1" PVC Casing
Bentonite Grout
#16/30 Silica Sand
1", 0.010" Slotted PVC
Piezo completed at 12'
Temporary Piezometer DP-1 Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
Date Started
Date Completed
Drilling Method
Sampling Method
Drilling Contractor
: 08-17-17
: 08-17-17
: Direct Push
: Continuous w/Clear PVC Liners
: Clement Drilling & Geophysics
Northing Coordinate : 9605.95 N.
Easting Coordinate : 10910.13 E.
Logged By : GW
Survey By : GW
Top of Casing El.: : 4218.08
Aw moo w
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16—w—A
EarthFax
De
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Fe
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Sample Legend
Gravel and Cobbles F-1 Sand
Silt
1z/A Clay
Water Levels
V During Well Construction
V Measured 08-22
DESCRIPTION
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Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
Date Started : 08-17-17 Northing Coordinate : 10376.59 N.
Date Completed : 08-17-17 Easting Coordinate : 11843.93 E.
Drilling Method : Direct Push Logged By : GW
Sampling Method : Continuous w/Clear PVC Liners Survey By : GW
Drilling Contractor : Clement Drilling & Geophysics Top o Casing El.: : 4221.05
Temporary Piezometer DP-88
De
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I
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F
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t
Surface
Elevation
4215
Sample Legend
Gravel and Cobbles
Sand
Silt
Water Levels
_M During Well Construction
Clay lz/A
DESCRIPTION
04-
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1
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SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry, dense ...Background PID 0.00 PPM...
...PID 123.8 PPM...
SILTY SAND/SANDY SILT: Dark olive gray, dry, dense
...strong hydrocarbon odor...
...PID 328 PPM @ 4 feet...
SILTY CLAY: It. gray, moist, firm ...first water @ 4.5-ft...
...grades highly plastic...
...PID 631 PPM...
...PID 371 PPM...
CLAYEY SILT/SILTY CLAY: It gray, moist, firm w/occ. very fine
sand lenses
...PID 2.7 PPM - Baclground PID 0.0 PPM...
...Boring completed at 12.0 feet...
0- 4215

4- 4211

8- 4207

12-

2
3
1" PVC Casing
Bentonite Grout
#16/30 Silica Sand
1", 0.010" Slotted PVC
Piezo completed at 12'
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EarthFax
Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
Date Started : 08-17-17 Northing Coordinate : 10485.31 N.
Date Completed : 08-17-17 Easting Coordinate : 11849.93 E.
Drilling Method : Direct Push Logged By : GW
Sampling Method : Continuous w/Clear PVC Liners Survey By : GW
Drilling Contractor : Clement Drilling & Geophysics Top of Casing El.: : 4221.30
Temporary Piezometer DP-90
De
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Fe
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Surface
Elevation
4217.8 Wa
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Sample Legend
Gravel and Cobbles
1-1 Sand r-r--1 silt
772 Clay
Water Levels
During Well Construction
DESCRIPTION
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SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry,
dense ...PID Background 1.00 PPM... ...PID 1.54 PPM...
1
SANDY SILT/SANDY CLAY: It. olive gray, damp, firm
...grades more uniform...plastic
...PID 2.3 PPM...
2 ...soft and wet...
...PID 10.0 PPM...
...grading with sand ...
3
SILTY SAND/SANDY SILT: It. medium brown, wet, med. dense
...PID 4.0 PPM...
...grades finer sand..micaceous with rust-colored mottling...
...grades to dark gray...
...PID 0.8 PPM...
...Boring completed at 12.0 feet...
0 — 4217.8

4- 4213.8

8- 4209.8

12-

1" PVC Casing
Bentonite Grout
#16/30 Silica Sand
1", 0.010" Slotted PVC
Piezo completed at 12'
PIEZOMETER LOC-1 Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
41111111.11 AMMON. - - ... dd. ow mir iii. fir Arm.. ?Of Ilk 1 I 1111 I 1116.7"...41 EarthFax
Date Started : 08-17-17 Northing Coordinate : 9395.58 N.
Date Completed : 08-17-17 Easting Coordinate : 10919.83 E.
Drilling Method : Direct Push Logged By : GW
Sampling Method : Continuous w/Clear PVC Liners Survey By : GW
Drilling Contractor : Clement Drilling & Geophysics Top o Casing El.: : 4218.0
De
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Surface
Elevation
4215 Wa
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Sample Legend Water Levels
Sa
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Gravel and Cobbles V During Well Construction
Sand After Completion
Silt
1.z.Lij Clay
DESCRIPTION
0 —
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15-
4215
4210
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SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry, ' • dense
.
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1" PVC Casing
Bentonite Grout
SILTY CLAY/CLAYEY SILT: It. olive gray, dampl, firm
...grades with more clay...
1

1 •
....grades slightly more brown and moist to wet...
=
El IIII C =
h"
I ...as above ...grades with more sand...
2 IC III =
#16/30 Silica Sand
1", 0.010" Slotted PVC
SILT CLAY/CLAYEY SILT: It. medium brown, moist to wet firm
3
MI
II ill =
— .. —
— ... — — — _ — — — — — _ — — — ...grades medium brown with very fine to fine sand, moist... — _ .—
E . . El mll Piezo
Boring completed at 12.0 feet - 1-inch piezometer installed...
4
completed at 12'
1
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EarthFax
Temporary Piezometer LCO-2 Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
Date Started : 08-17-17 Northing Coordinate : 9390.32 N.
Date Completed : 08-17-17 Easting Coordinate : 10927.84 E.
Drilling Method : Direct Push Logged By : GW
Sampling Method : Continuous w/Cler PVC Liners Survey By : GW
Drilling Contractor : Clement Dnlling & Geophysics Top of Casing El.: : 4217.70
Cobbles
Water Levels
During Well Construction
V Measured 08-22
De
p
th In

Fe
e
t
Sample Legend
77:71 Gravel and
Sand
FTTTT1 Silt
ELj Clay Surface
Elevation
4214.70 DESCRIPTION Wa
te
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Le
v
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l
0 — 4214.7 SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry,
dense
...PID 0.0 PPM...
1" PVC Casing
Bentonite Grout
SILTY CLAY/CLAYEY SILT: It. olive gray, damp, firm
...grades with more clay and very fine sand stringers to 4.0-ft...
...PID Background 0.0 PPM...
...PID Reading 0.0 PPM...
1
4- 4210.7
....as above to 8.0 - PID 0.0 PPM...
#16/30 Silica Sand 2
1", 0.010" Slotted PVC
8- 4206.7
...Sample LCO-2 4.6 to 5.6-ft. - PID 0.0 PPM...
3
12-
SILT CLAY: It. medium brown, moist to wet, firm, plastic
firm
...PID 0.0 PPM...
...Boring completed to 12.0-ft... Piezo completed at 12'
0 — 4214.6
8- 4206.6
12-
4- 4210 6
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EarthFax
Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation
Date Started : 08-17-17 Northing Coordinate : 9387.10 N.
Date Completed : 08-17-17 Easting Coordinate : 10915.50 E.
Drilling Method : Direct Push Logged By : GW
Sampling Method : Continuous w/Clear PVC Liners Survey By : GW
Drilling Contractor : Clement Drilling & Geophysics Top of Casing El.: : 4218.4
Temporary Piezometer LCO-3
De
p
th
I
n

F
e
e
t
Surface
Elevation
4214.6 Wa
te
r Le
v
e
l
Sample Legend
Gravel and Cobbles
Sand
Silt
772 Clay
Water Levels
During Well Construction
• Measured 08-22
DESCRIPTION
SILTY SAND/GRAVEL: (FILL) Med. brown, angular gravel, dry,
dense
...Background PID 0.0 PPM... ...PID 0.0 PPM...
SANDY SILT/SILTY SAND: It. brown, moist med, dense
...grades with more silt and some clay, olive and very moist @ 4.0-ft...
...PID 0.0 PPM...
1
....thin interbeds with very fine sands...
04
-
18
-
20
1
8

G
AU
C
1
7
2
7

-

Ch
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EM
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u
mm
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ry

R
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ort
a
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u
lts
lo
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s\L
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-
3.
bo
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•
...as above but grades with more sand... 2
...PID 0.0 PPM...
SILT CLAY/CLAYEY SILT: It. medium brown, moist to wet firm,
...PID 0.0 PPM...
...Groundwater sample LCO-3 collected after piezometer completion...
...PID 0.0 PPM...
...Boring completed at 12.0 feet...
...Sample LCO-3 @7.2 ft. to 8.2 ft. ...
3
1" PVC Casing
Bentonite Grout
#16/30 Silica Sand
1", 0.010" Slotted PVC
Piezo completed at 12'
Eart hFax
2" PVC Casing
Bentonite Grout
#16/30 Silica Sand
2" 0.010" Slotted PVC
Well Completion 16.8'
Chevron Products Company Salt Lake Refinery Light Cycle Oil LNAPL Investigation (MW S-18 Installed in 2002)
Date Started : 2002 Northing Coordinate : 9379.50 N.
Date Completed : 2002 Ea sti ng Coordinate : 10919.83 E.
Drilling Method : Direct Push Logged By : JH
Sampling Method : Continuous Acrylic Liners Survey By : JH
Drilling Contractor : On-Site Environmental Top of Casing El.: : 4217.36
MONITORING WELL S-18A
De
p
th In

Fe
e
t
Surface
Elevation
4214.68 Wa
te
r

Le
v
e
l
Water Levels
Well Disturbance - Not Measured
_2_ Measured 09-26
Sample Legend
Gravel and Cobbles
Sand
71711 silt
Clay
DESCRIPTION
SILTY SAND: gray, med, dense
...grades with layer of silty fine sand, loose...

0 — 4214.68

5— 4209.68

10 — 4204.68
04-
18
-
20
1
8

G
AU
C1
7
2
7
-

Ch
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E
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mm
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y

R
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lo
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-
18
.
bo
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15— 4199.68

20—

SILT CLAY: Gray, soft
...Boring Completed at 19.0 ft...
1
2
3
SILTY SAND w/GRAVEL: Fine to coarse sand, medium dense
Galen Williams
EarthFax Engineering
7324 So. Union Park Ave., # 100
Midvale, UT 84047
TEL: [phone]
RE: LCO Investigation / UC1727
Dear Galen Williams: Lab Set ID: 1708436
American West Analytical Laboratories received sample(s) on 8/18/2017 for the analyses
presented in the following report.
American West Analytical Laboratories (AWAL) is accredited by The National
Environmental Laboratory Accreditation Program (NELAP) in Utah and Texas; and is
state accredited in Colorado, Idaho, New Mexico, Wyoming, and Missouri.
All analyses were performed in accordance to the NELAP protocols unless noted
otherwise. Accreditation scope documents are available upon request. If you have any
questions or concerns regarding this report please feel free to call.
The abbreviation "Sun' found in organic reports indicates a surrogate compound that is
intentionally added by the laboratory to determine sample injection, extraction, and/or
purging efficiency. The "Reporting Limit" found on the report is equivalent to the
practical quantitation limit (PQL). This is the minimum concentration that can be
reported by the method referenced and the sample matrix. The reporting limit must not be
confused with any regulatory limit. Analytical results are reported to three significant
figures for quality control and calculation purposes.
3440 South '700 West
Salt Lake City, UT 84119
Phone: [phone]
Toll Free: [phone]
Fax: [phone]'7
e-mail: [e-mail]
web: www.awal-labs.com
Kyle F. Gross
Laboratory Director
Jose Rocha
QA Officer
Thank You,
Approved by:

Kyle F. Digitally signed by Kyle F. Gross Date: Gross 2017.08.2'1
15:12:14 -06'00'

Laboratory Director or designee
Report Date: 8/21/2017 Page 1 of 4
All analyses applicable to the CV, A. SIMA, and RCRA arc gvtloorred et accordant., to Nf l AC protowls Pcroneni sampling nfonnaurriiit lovatcd on the attached l ti< l ostridential 13115111s, Intotmatton [los capon o prattled lot ilt. csclusive UMs of dis addressee Prictleges of subsequent usc oldie name of this company flt arn. menthe, of Its stall, or teproduetion of th,s tspon ot connection with the adveiliscment, promotionoi sale of any product or process or in conotatton %Oh the rt.-publorafion of tlus repott for arty purprKe tobt, than for the addrawe srill t14.1 granted only on cantor t llris tympana accepts no rerponsibilitr except toi the dra. perfonnant c of tap:coon antbor Onairlds M good froth nnd according to the rules of the trade and of scisake
Ainericati VVe NAI ,,,CA, I AAOPATOR I
ORGANIC ANALYTICAL REPORT
Client:
Project:
Lab Sample ID:
Client Sample ID:
Collection Date:
Received Date:
Analytical Results
EarthFax Engineering
LCO Investigation / UC1727
1708436-002B
LCO-2 @ 4.6'-5.6'
8/17/2017 1158h
8/18/2017 830h
Contact: Galen Williams
Test Code: 8015-S-TPH-3546
TPH-DRO (C10-C28) by Method 8015D/3546
3440 South 700 West
Salt Lake City, UT 84119
Analyzed: 8/21/2017 941h
Units: mg/kg-dry
Extracted: 8/18/2017 1114h
Dilution Factor: 1 Method: SW8015D
Compound
CAS
Number
Reporting Analytical
Limit Result Qual
Diesel Range Organics (DRO) (CI 0-C28) 68476-34-6 25.1 25.2
Phone: [phone]
Toll Free: [phone] Surr 4-Brornofluorobenzene 460-00-4 24.1 41.87 57.5 10-122
Fax: [phone]
e-mail: [e-mail]
web: www.awal-labs.com
Kyle F. Gross
Laboratory Director
Jose Rocha
()A Officer
Report Date: 8/21/2017 Page 2 of 4
All analyses wire:title rt. the C11. A, Sf)11 A and Rl ff lr le performed an aecordmrce to NLIAr. protocols Pee mient r.atopling informanon o located on ohs attached t ortIdentral Business inlormarron Tito report n, provided for Me sselostss terc nf dis atittreseo Prit ilegm of subsequent I. of the None of dos etampany or an... member of Its Mort Of reproduci Ion of this report m connection v.oli the ads etusetnent. prontotiOn or nate of an) produer or process or in connection ft ah il&n re.,Nbitearion of this eepori for arty putpnfie other titan for the addressee will be granted onlf; on contom llo company accepts no yetponsibilit., e‘rept lor rlrc doe per-romans.: 01 inspeciton and,Or anabsis rn good faith anti litTncdillg 10 the Ailey oi the trade and of science
Surrogate CAS Result Amount Spiked % REC Limits Qual
111,1•t ri•C At 614011ArePri
Surrogate CAS Result Amount Spiked % REC Limits Qual
Surr: 1,2-Dichlomethane-d4 17060-07-0 0.0516 0.05000 103 72-151
Surr: 4-Bromofluorobenzene 460-00-4 0.0552 0.05000 110 80-152
Surr: Dibromofluoromethane 1868-53-7 0.0509 0.05000 102 70-130
Sum Toluene-d8 2037-26-5 0.0515 0.05000 103 81-123
web: www.awal-labs.com
Kyle F. Gross
Laboratory Director
Jose Rocha
QA Officer
ORGANIC ANALYTICAL REPORT
Client: EarthFax Engineering Contact: Galen Williams
Project: LCO Investigation / UC1727
Lab Sample ID: 1708436-001A
Client Sample ID: LCO-3
Collection Date: 8/17/2017 1355h
Received Date: 8/18/2017 830h Test Code: 8260-W-PPM
Analytical Results VOAs MBTEXN/GRO by GC/MS Method 8260C/5030C

Analyzed: 8/18/2017 1406h
Units: mg/L Dilution Factor: 1

Method: SW8260C
3440 South 700 West

CAS
Number
Reporting Analytical
Limit Result Qual Salt Lake City, UT 84119 Compound
Phone: [phone]
Toll Free: [phone]
Fax: [phone]
e-mail: [e-mail]
Benzene 71-43-2 0.00100
Ethylbenzene 100-41-4 0.00200
Naphthalene 91-20-3 0.00200
Toluene 108-88-3 0.00200
TPH C6-C10 (GRO) 0.0200
Xylenes, Total 1330-20-7 0.00200
< 0.00100
< 0.00200
< 0.00200
< 0.00200
< 0.0200
< 0.00200
Report Date; 8/21/2017 Page 3 of 4
All anal) applirrhic in Met WA SIM A, and R('ItA arc performed in accordance to NITA( prasocok Pei linens sampling infmmation i, lorated oc the: ana,hcri CCK onfidential limincY. Information Dio, rcpoir is provided for ilcc. orthisicr isc ot rlsc addro,scc. Privdcgcn ol MIlhl.41111011t s,or fli tilt hank Of ail, WHIN% or am mcnitocr ol gull. Or rcprodoction of thiN report in connection %ids ad,cniscnicni promotion or ale Al aro product Or proccs, or m conneciMo with the iv-publication of this report for any purpos, other than int Mc addrecsec u Kr !minted mil) on con. t lir,s woman., accept, no resrusnathriq except for ihc r,-rionnarrcccrs insperlion nrui or analvms rn food latth and neording 155 the Mil, 01 the tradc and oi scirm,c
Surrogate CAS Result Amount Spiked % REC Limits Qual
Surr: 1,2-Dichlomethane-d4 17060-07-0 0.0648 0.06159 105 51-170
Surr 4-Bromofluorobenzene 460-00-4 0.0646 0.06159 105 55-140
Surr: Dibromofluoromethane 1868-53-7 0.0623 0.06159 101 50-135
Surr: Toluene-d8 2037-26-5 0.0625 0.06159 101 50-140
Sampling and analytical preparation performed by method 5030C modified for analysis of soil samples collected in 2 or 4 oz jars.
Client:
Project:
Lab Sample ID:
CHent Sample ID:
Collection Date:
Received Date:
Analytical Results
EarthFax Engineering
LCO Investigation / UCI727
1708436-002A
LCO-2 @ 4.6'-5.6'
8/17/2017 I158h
8/18/2017 830h
ORGANIC ANALYTICAL REPORT
Contact: Galen Williams
Test Code: 8260-S-PPM
VOAs MBTEWGRO by GC/MS Method 8260C
3440 South 700 West
Salt Lake City, UT 84119
Analyzed: 8/18/2017 1823h
Units: mg/kg-dry
Compound
Dilution Factor: 0.98
CAS
Number
Method: SW8260C
Reporting Analytical
Limit Result Qual
Phone: [phone]
Toll Free: [phone]
Fax: [phone]
e- mai 1 ; awal @,awal- labs. com
web: www.awal-labs.com
Kyle F. Gross
Laboratory Director
Jose Rocha
QA Officer
Benzene
Ethylbenzene
Naphthalene
Toluene
TPH C6-C10 (GRO)
Xylenes, Total
71-43-2 0.00123 < 0.00123
100-41-4 0.00246 < 0.00246
91-20-3 0.00246 < 0.00246
108-88-3 0.00246 < 0.00246

0.0246 < 0.0246
1330-20-7 0.00246 < 0.00246
Report Date: 8/21/2017 Page 4 of 4
All anotytAA applicably io the (AV ii St/WA. aml RCKA are inoilonned ill aecord,nyc IO NLLA1. proiotols Pennicni sampling mlormainyi s kAderod on the attached coc onrhimai llisme>s iriirrrrraiìrì this repon 0 mot 1,1.1 tor the tAc lust., nye of du addoctsce PìisReg. of subsequent use of ihe now of dm compom 01 any niembtr of $10. Sinn', tìr n.r.d.choo ifll dm report in to111.11011 WIIII tliìì iiticsortisoìrtrini pronnolion 111 mk ììl ,t1” pnIllUl I Of proyuss. OT tOTIO1,11011 WWI the re-plIbtiCal1011 nl'tlrns leper I (Or any purpow other than for lhe addressor 14 ill bo graniod 001) 011 CO,11.1Ci lìiiniourìp.rny .11,Th 110 re4700,11h1111.1 ssoopt for du2 rlr,s pdlonslauce of inypetmon und/os anal)fis ist rod faith and according lo Ills rules dill,: MAO dud of ccuairc
Rpt Emailed: American West Analytical Laboratories
Collected Date Received Date Test Code Sample ID Client Sample ID Matrix Sel Storage
df - tph 8015-S-TPH-3546
Test Group: 8015-S-TPH-3546; # of Analytes: 1 / # of Surr: 1
PMOLST df tplt
EarthFax Engineering
EAR100
LCO Investigation lUC1727
PA Rush;
Contact: Galen Willismis
QC Level: I
Wmk Order: 1708436 page on
Due Date: 8/29/2017
WO Type: Standard
Client:
Client ID:
Project:
Comments:
WORK ORDER Summary
1708436-00IA LCO-3 8/17t2017 1355h 8/18/2017 0830h
1708436-002A LCO-2 ® 4.6'-5.6' 8/17/2017 1158h 8/1812017 0830h
1708436-002B
8260-W-PPM Aqueous VOCFridge
Test Group: 8260-W-MBTEKN/GRO; # of AnaOtes: 6 / # of Sum: 4
8260-5-PPM Soil VOCFridge
Test GPM,: 8260-S-MBTEXN/GRO; # of AnaOies: 6 / # of Surr: 4
3546-T1'H-PR df - tre
Printed: 9/18/2017 FOR LABORATORY USE ONLY pi out on page.* %M RT CN TAT OC 0 HOK HOK HOK COG Entailed
GM OM OM MI MI OM SRI ON RN MB NM all MI MO MN OM MI
V7D LD CHAIN OF CUSTODY American West
Analytical Laboratories
OM SO MB Si MB In UN MB MI UN MO MI In an In OM
3440 S. MO W. Salt Lake Orly, UT 84119
Phone * [phone] Toll Free # (888) 2834888
AA analysis WM b• oonrksted uses NELSP roxreltod inerhock and al dela se be reported using AWOL" landed Andy, kis aid AWAL Lab Sarrple Set toporep lank (POLL mess aperIncelly Neuwied alhatelea on Ile Chin ol Cusigdy rake onachod docomantallon.
Air.% Fax a [phone] Emall awalOawal-labacom
www.awal-labs.com
Client Ecak.erc.C+:0C e V1f0VI-CC-10V•4"6e1
oc Level: 5410N.41,Am
1 2 2+ 3 3+ I
Turn Around Time:
1 2 3 4 5
Unless other amooments Imre boon
meek slimed reports MI be sonallsd by
5:00 IMI cm the day they se Ws
Due Date:
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Address: -11 % 4% So- IJ 40...s..ia•A, Nvv-(4-. I:V.11
Contact Clock Lc sk k.sj k kA.t.0V For Compliance With: o NELAP . RCRA 0 CWA 0 SDWA 0 ELAP I A2LA 0 NLLAP 0 Nrri-Cernpllance 0 Other:
Phone #: %CA. —.PD Ce t, —k. 5 S, co t IN c•l- 5 3 a -'2.t co,
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' Sample Comments
Sampler Name:
Sample ID: Date Sampled Time Sampled
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