DERR-2024-012089

6440 South Millrock Drive
Suite 300
Holladay, Utah 84121
O +1.385.474.8500
www.jacobs.com

AX0228191105SLC
Mazie Cox
UDEQ-DERR
195 North 1950 West
Salt Lake City, UT 84114
November 30, 2023
Subject: 2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4
Union Pacific Railroad, Ogden, Utah
Civil Action No. 1:06-cv-00115 BSJ
Dear Ms. Cox,
This annual groundwater monitoring report for 2023 is being submitted by Jacobs Engineering Group Inc.
(Jacobs) on behalf of Union Pacific Railroad (UPRR) for Operable Units (OU) 1 and 4 at the UPRR
Ogden Railroad facility (site) in Ogden, Utah (Figure 1). This report summarizes the results of the 2023
annual sampling event at the Ogden Railyard and Weber River. Field activities were performed in
accordance with the Quality Assurance Project Plan, Union Pacific Ogden Railroad Facility, Operable
Units 1 and 4 (QAPP)1.
The Remedial Investigation Report2 and the Ogden Railroad Yard Superfund Site Second Five Year
Review3, contain site background and historical data, respectively.
Groundwater Gauging and Monitoring Results
The 2023 annual monitoring and sampling event, which was performed on October 6th and 19th , included
the required long-term monitoring (LTM) activities at OU 1 and OU 4 North as specified in Tables 2-1 and
2-2 of the QAPP.
The activities performed at OU 1 included collecting a grab water sample and field duplicate of surface
water at Goode Lake for volatile organic compound (VOC) analysis. The surface water sample was
collected from the southern bank near the buoys in the eastern portion of the pond (Figure 2). Results of
the grab sample are included in Table 1. No constituents of concern were detected above their respective
MCLs.
The activities performed at OU 4 North included gauging the Weber River and wells 34-MW8 and 34-
MW10 to determine whether the Weber River was a gaining stream with respect to the wells. Locations of
the wells, the Weber River gauge, and the 2022 estimated vinyl chloride plume and potentiometric
contours (Spring 2022) for OU 4 North are included on Figure 3. The gauging results demonstrated that
the river was gaining (see Table 2); therefore, a groundwater sample was collected from 34-MW8 and
analyzed for monitored natural attenuation (MNA) parameters and VOCs, as specified in the QAPP. Field

1 CH2M HILL, Inc. 2016. Quality Assurance Project Plan, Union Pacific Ogden Railroad Facility, Operable Units 1 and 4. Union Pacific
Railroad. Ogden, Utah. Draft. August.
2 Forrester Group. 2003. Remedial Investigation Report. Union Pacific Railroad. Ogden, Utah. Final. September.
3 U.S. Environmental Protection Agency. 2021. Ogden Railroad Yard Superfund Site Second Five Year Review, Weber County, Ogden, UT.
July.

parameters and MNA results are included in Table 3, and VOC results are included in Table 4. Well 34-
MW10 was found to be dry. The sampling logs and laboratory reports are presented in Attachments 1 and
2, respectively, and the data validation report is included in Attachment 3.
Groundwater concentrations for COCs were compared with the EPA maximum contaminant levels
(MCLs) for drinking water4, where established. No constituents of concern were detected above their
respective MCLs.
Note that only analytical data for contaminants of concern (COCs) or potential COCs are included in
Table 4.
Monitoring Well Abandonment Activities
In the 2022 Annual Report5, UPRR requested to abandon 5 wells at the site that had blockages or were
damaged. Approval of the annual report was provided by the UDEQ in an email dated March 20, 2023. A
preliminary inventory of the wells to be abandoned was conducted on September 18, 2023, and it was
discovered that well 30-B16(P) could not be located. On September 19th a surveyor was brought on-site
to locate the well. The area around the surveyed location was cleared of debris by Durbano Metals. The
well could not be located and is considered permanently lost. The remaining 4 wells were abandoned by
a Utah licensed driller. Table 5 documents the well abandonment activities and wells to replace the
abandoned wells in the monitoring program. These replacement wells were documented and approved in
the 2022 Annual Report. Attachment 4 contains the well abandonment logs.
In compliance with state regulations, abandonment was completed by attempting to remove the upper 2
feet of well casing beneath the ground surface with a direct-push drill rig and filling the remaining casing
and open hole with a Portland cement grout plus bentonite chips. All well completion materials including
pads, vaults, and bollards were removed and the ground surface was returned to conditions matching the
surrounding area. Non-recyclable waste generated during well abandonment was disposed of as non-
hazardous waste at the Weber County Transfer Station. Metal waste (bollards and vaults) were salvaged
and stored for future use by UPRR.
Path Forward
The next monitoring event for the site is the biennial sampling scheduled for spring 2024. This work will
be completed in accordance with the QAPP. The next report will be submitted following completion of the
fall annual monitoring event.
If you have questions or need additional information, please feel free to call me at [phone].
Sincerely,
Jacobs

Terence Mares
Project Manager

cc: Kevin Wangerud/EPA
Rebecca Rewey/UPRR

4 U.S. Environmental Protection Agency (EPA). 2023. Regional Screening Level Summary Table. May.
5 Jacobs. 2022. 2022 Annual Groundwater Monitoring Report, Operable Units 1 and 4. Union Pacific Railroad. Ogden, Utah. November.

Enclosures
Tables
1 Operable Unit 1 CVOC Concentrations
2 Operable Unit 4 North Fluid Level Measurements
3 Operable Unit 4 North MNA Parameters and Measured Field Parameters
4 Operable Unit 4 North CVOC Concentrations
5 Well Abandonment Activities

Figures
1 Site Location Map
2 OU1 Map
3 OU4 North CVOC Plume Area
4 OU 4 South Map
Attachments
1 Sampling Logs
2 Laboratory Report
3 Data Validation Report
4 Well Abandonment Logs

Tables
Table 1. Operable Unit 1 CVOC Concentrations
2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4, Union Pacific Railroad, Ogden, Utah
Well ID Date Be
n
z
e
n
e
Et
h
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Vi
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y
l

c
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i
d
e
Units µg/L µg/L
µg/L
MCL 5 700
2
09/30/19 <0.079 <0.12 <0.11
02/01/21 <0.0941 <0.137 <0.234
03/17/21 <0.0941 <0.137 <0.234
05/06/22 0.109 J <0.137 <0.234
10/19/23 0.238 J 0.235 J <0.234
Notes:
Only compounds detected above the laboratory reporting limit are listed in the table.
VOCs analyzed using EPA Method 8260
< = less than the reporting limit
µg/L = microgram per liter
EPA = U.S. Environmental Protection Agency
ID = identification
J = The analyte is an estimated value between the reporting limit and the method detection limit.
MCL = maximum contaminant level (the maximum concentration of the contaminant allowable by the EPA in drinking water)
UJ = Estimated detection limit. The result is estimated and may be a false negative due to related QC problems.
Goode Lake
Bold Type indicates the analyte detected at or above the MCL or Utah Department of Environmental Quality Initial
Screening Level for total petroleum hydrocarbons.
AX0228191105SLC PAGE 1 OF 1
Table 2. Operable Unit 4 North Fluid Level Measurements
09/30/19 7.86 4,278.48
06/29/20 8.01 4,278.33
09/29/20 7.66 4,278.68
03/15/21 8.58 4,277.76
09/14/21 7.86 4,278.48
05/02/22 7.66 4,278.68
10/06/23 8.02 4,278.32
09/30/19 10.82 4,278.49
06/29/20 Dry --
09/29/20 11.21 4,278.10
03/15/21 Dry --
09/14/21 Dry --
05/02/22 10.52 4,278.79
10/06/23 Dry --
09/30/19 13.29 4,278.39
06/29/20 13.92 4,277.76
09/29/20 13.58 4,278.10
03/15/21 13.72 4,277.96
09/14/21 13.63 4,278.05
05/02/22 13.61 4,278.07
10/06/23 13.77 4,277.91
Notes:
Well ID
amsl = above mean sea level
ft = foot (feet)
ID = identification
2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4, Union Pacific Railroad, Ogden, Utah
Reference
Point
(ft amsl)
Depth to Watera
(ft)Date
34-MW8
4,291.68
4,286.34
a Depth to groundwater from top of well casing or river surface from survey reference point.
Comments
Weber River
34-MW10 4,289.31
Groundwater
Elevation
(ft amsl)
AX0228191105SLC\Table_2_2023OU4North_GW PAGE 1 OF 1
Table 3. Operable Unit 4 North MNA Parameters and Measured Field Parameters
2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4, Union Pacific Railroad, Ogden, Utah
Well ID
Screen Interval
(ft bgs - ft bgs)Date Su
l
f
a
t
e
Ch
l
o
r
i
d
e
Al
k
a
l
i
n
i
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y

a
s

Ca
C
O
3
Ni
t
r
a
t
e
Me
t
h
a
n
e
Et
h
a
n
e
Et
h
e
n
e
pH
Electrical
Conductivity
Ferrous
Iron
Dissolved
Oxygen
Oxidation-
reduction
Potential
Units mg/L mg/L mg/L mg/L µg/L µg/L µg/L mS/cm mg/L mg/L mV
9/30/19 28.4 519 597 0.82 510 [J] 12.9 [J] <2.9 [J] 7.00 2.683 3.30+ 0.31 -141.8
9/29/20
9/14/21
5/5/22 29.9 488 608 0.315 230 <4.07 <4.26 6.68 2.586 2.5 0.52 -62.1
10/6/23 28.7 478 604 <0.05 477 <0.422 4.6 6.85 2.777 3.30+ 2.49 -91.4
9/30/19 23.8 519 547 0.79 270 [J] 7.7 [J] <2.9 [J] 6.89 2.566 3.30+ 0.38 -110.7
9/29/20
9/14/21
5/5/22 28.9 633 628 <0.050 446 <4.07 <4.26 6.74 3.312 3.5 0.34 -121.4
10/6/23
Notes:
+ = actual value exceeds upper limit of detection
< = less than the reporting limit
bgs = below ground surface
CaCO3 = calcium carbonate
ft = foot (feet)
J = estimated concentration
mg/L = milligram(s) per liter
MNA = monitored natural attenuation
mS/cm = milliSiemen(s) per centimeter
NA = not analyzed
No sample collected. Weber River water level is higher or equal to the 34-MW8 monitoring well water level.
No sample collected. Weber River water level is higher or equal to the 34-MW8 monitoring well water level.
No sample collected. Weber River water level is higher or equal to the 34-MW10 monitoring well water level.
Well is dry. No sample collected.
Well is dry. No sample collected.
4 - 1434-MW8
5 -1534-MW10
mV = millivolt
ID = identification
µg/L = microgram(s) per liter
ES020112202827SLC\Table_3_2023OU4North_GWData_MNA_FP_v0
PAGE 1 OF 1
Table 4. Operable Unit 4 North CVOC Concentrations
2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4, Union Pacific Railroad, Ogden, Utah
Well ID
Screen Interval
(ft bgs - ft bgs)Date 1,
1
,
1
-
T
r
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t
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1,
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-
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Units µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L
MCL 200 5 NE 7 5 NE 70 100 5 NE NE 700 5 5 2
09/30/19 <0.12 <0.10 18 <0.22 <0.14 NA 0.79 J <0.17 0.32 J 0.82 J <0.16 <0.12 <0.17 <0.22 5.2
09/29/20
09/14/21
05/05/22 <0.149 <0.158 0.182 J <0.188 <0.0819 <10.0 <0.0941 <0.192 <0.960 0.145 J <0.137 <0.300 <0.149 <0.190 <0.234
10/06/23 <0.149 <0.158 4.91 <0.188 <0.0819 <0.597 0.350 J <0.149 <0.0941 <0.192 <0.960 <0.137 <0.190 <0.300 <0.234
09/30/19 <0.12 <0.10 8.5 <0.22 <0.14 NA 0.70 J <0.17 <0.079 <0.42 <0.16 <0.12 <0.17 <0.22 4.0
09/29/20
09/14/21
05/05/22 <0.149 <0.158 <0.100 <0.188 <0.0819 <10.0 <0.0941 <0.192 <0.960 0.276 J <0.137 <0.300 <0.149 <0.190 <0.234
10/06/23
Notes:
Bold Type indicates the analyte detected at or above the MCL
< = less than the method detection limit, reported value is the method detection limit
µg/L = microgram(s) per liter
bgs = below ground surface
ft = foot (feet)
ID = identification
J = This qualifier indicates that the analyte is an estimate value between the reporting limit and the method detection limit.
MCL = maximum contaminant level
NA = not analyzed
NE = not established
No sample collected. Weber River water level is higher or equal to the 34-MW8 monitoring well water level.
No sample collected. Weber River water level is higher or equal to the 34-MW8 monitoring well water level.
No sample collected. Weber River water level is higher or equal to the 34-MW10 monitoring well water level.
Well is dry. No sample collected.
Well is dry. No sample collected.
4 - 14
34-MW10 5 - 15
CVOC = chlorinated volatile organic compound
34-MW8
AX0228191105SLC PAGE 1 OF 1
Table 5. Monitoring Well Abandonment Activities
2023 Annual Groundwater Monitoring Report, Operable Units 1 and 4, Union Pacific Railroad, Ogden, Utah
Sampling
Frequency
Well
Replacement ID
Operable Unit 133-MW1 5YR 9/19/2023 SU 2 14.23 Abandoned 33-MW633-MW1FP B 9/19/2023 SU 2 24.60 Abandoned 33-MP233-MW4 5YR 9/19/2023 SU 2 15.37 Abandoned 33-MW8
Operable Unit 4 NorthSPRR3-MW2 5YR 9/18/2023 FM 2 13.00 Abandoned SPRR3-MW3
Operable Unit 4 South30-B16(P)5YR MNA 9/19/2023 SU 2 13.00 Could Not Locate; Assumed Lost 30-MW6D
Notes:5YR = 5-yearB = biennialbgs = below ground surfaceFM = flush mountft = foot (feet)ID = identificationin = inches MNA = monitored natural attenuationSU = stick up
CommentsDate Abandoned
Completion
Type
Diameter
(in)Location ID
Total
Depth
(ft bgs)
AX0228191105SLC Page 1

Figures
ST204
ST104
ST53
ST104
ST104
9
Coffer Dam
G
o
o
d
e
L
a
k
e
Ogden R i v e r
20th St
21st St
24th St
Wa
l
l

A
v
e
W
e
b
e
r
Ri
ver
31st St
§¨¦I-15
DOWNTOWN OGDEN
44 MILES TO SALT LAKE CITY
9
Buena Ventura Pond and Park
FORMER PINTSCHGAS FACILITY
\\Dc1vs01\gisproj\U\UPRR\UPRR_Ogden\UPRR_Ogden\MapFiles\2022\GMR\Figure1_SiteLocationMap.mxd AESPEJO 11/6/2023 12:45:46
0 1,000 2,000
Feet
LEGEND
COMMUTER LINE TRACK
APPROXIMATE OGDEN RAILYARDBOUNDARY
APPROXIMATE AREA OFINDUSTRIAL SEWER LINEREMEDIATION AND SOURCE AREASOIL REMOVAL
APPROXIMATE OU1 SITE BOUNDARY
APPROXIMATE OU4 NORTH PLUMEBOUNDARY
APPROXIMATE OU4 SOUTH PLUMEBOUNDARY
STATE ROUTE
1 inch = 1,000 feet
TCE = TRICHLOROETHENE
CIS-1, 2-DCE = CIS-1, 2-DICHLOROETHENEMAP EXTENT§¨¦15
§¨¦84
§¨¦15
SouthWeber
Uintah
WashingtonTerrace
Riverdale
SouthOgden
Roy City
WestHaven OgdenCity
Marriott-SlatervilleCity
FarrWestCity
£¤89
MAP INDEX
FIGURE 1SITE LOCATION MAP2023 ANNUAL GROUNDWATER MONITORING REPORT, OPERABLE UNITS 1 AND 4 UNION PACIFIC OGDEN RAILROAD FACILITY, OGDEN, UTAH
ST204
Notes:Aerial Imagery is 2016 NAIP imagery
A AA
A
AA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
A
A
A
AA
A
GOODE LAKE
OGDEN RIVER
21ST STREET OVERPASS
33-MW9
33-MW8
33-MW6
33-MW4AA
33-MW6FP
33-MW5FP
33-MW4FP
33-MW2FP
33-MW1FP
33-MW10FP
33-MP1
33-RW2
33-MP5
33-MP3
33-MP633-IW1
33-RW1
33-MP4
33-MP2
33-MW5
33-MW4
33-MW3
33-MW11
33-MW5A
33-MW12FP
33-MW11FP
33-MW2
33-MW1
SOURCES:1. THE FORRESTER GROUP, PILOT DNAPL RECOVERY SYSTEM OPERATIONAL REPORT, FEBUARY 2003 (FIGURE 2).2. THE FORRESTER GROUP, OGDEN FEASIBILITY STUDY, SEPTEMBER 2004 (FIGURE 3-4).3. AERIAL IMAGERY IS MICROSOFT BING IMAGERY.
\\dc1vs01\GISProj\U\UPRR\UPRR_Ogden\UPRR_Ogden\MapFiles\2023\GMR\Figure2_OU1_Map.mxd AESPEJO 11/3/2023 14:31:25
FIGURE 2OPERABLE UNIT 1 MAP2023 ANNUAL GROUNDWATER MONITORING REPORT, OPERABLE UNITS 1 AND 4UNION PACIFIC OGDEN RAILROAD FACILITY, OGDEN, UTAH
0 200 400
Feet
WELL SAMPLING AND GAUGING FREQUENCY
A BIENNIAL
A FIVE YEAR
A WELL GAUGING ONLYFIVE YEAR FREQUENCY
A NOT GAUGED OR SAMPLED
A GOODE LAKE SURFACE SAMPLE LOCATION
A ABANDONED
APPROXIMATE EXTENTOF RESIDUAL DNAPL
APPROXIMATE OGDEN RAILYARDBOUNDARY
1 inch = 200 feet
LEGEND
\\dc1vs01\GISProj\U\UPRR\UPRR_Ogden\UPRR_Ogden\MapFiles\2023\GMR\Figure3_OU4N_CVOC_Plume_Area.mxd AESPEJO 11/16/2023 09:32:23
!P
WEBER RIVER
21st St
24th St
4274
4 2 8 0
4279
42784277
4275
WEBER RIVER GAUGE(4277.91)
34-MW10(Dry)(NS)
34-MW8(4278.32)(ND)
18-MW1
SPRR3-MW3
34-MW9
34-MW3
38-MW12
34-MW6
22a-MW6
34-MW2
34-MW1
22a-MW3
34-MW7D
38-MW9
38-MW5
38-MW3
35-MW2
35-MW1
34-OB -12
34-OB -17
SPRR3-MW2
34-B1W1
34-B2W2
34-SPMW-02
38-MW8
38-MW6
34-MW4
22a-MW1
34-OB -16
34-SPMW-03
42784277
4279
4 2 7 6
4280
4 2 7 5
4276
4 2 7 4
4281
4 2 8 1
(16)
NotesPlume contours based on Spring 2022 results.MNA = Monitored natural attenuationMSL = Mean Sea LevelND = Not detectedNS = N ot sampledAerial Imagery is Microsoft Bing Imagery
LEGEND
WELL SAMPLING AND GAUGING FREQUENCY
A ANNUAL
A BIENN IAL
A FIVE YEAR
A
WELL GAUGING ON LYFIVE YEAR FREQU ENCY
A FIVE YEAR MN A
A ABAND ONED
!P
RIVER GAUGE (NOT USED FOR POTEN TIOMETRIC C ONTOU R)
GR OUNDWATER ELEVATION CONTOUR(FEET ABOVE MSL, SPRING 2022)
GR OUNDWATER FLOW DIRECTION(SPRING 2022)
VINYL CHLORIDE CONCENTRATION (μg/L, FALL 2023)
GR OUNDWATER ELEVATION (FEET ABOVE MSL, FALL 2023)
VINYL CHLORIDE CONCENTRATION(µg/L, SPR ING 2022)
4273
2
10
100
(4267.27)
FIGURE 3OU4 NORTH CVOC PLUME AREA2023 ANNUAL G ROUND WATER MO NITORING REPORT, OPERABLE UNITS 1 AND 4UNION PACIFIC RAIL ROAD COMPANY, OG DEN, UT
1 inch = 500 feet
0 500250
Feet
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
22b-MW1A
30-MW1
22b-MW2D
30-MW6D
26-MW1
21-MW2
26-STMW1
21-MW1A
30-B7(P)
30-B16(P)
20-MW4
30-MW7
26-MW2
20-MW2
30-MW4A
30-MW3
4296
4 3 0 0
4 3 0 1
4298
4297
4 2 9 9
4
2
9
9
4297
4
3
0
0
4
3
0
1
4296
4298
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FIGURE 4OU4 SOUTH MAP2023 GR OUNDWATER MON ITOR ING R EPO RT, OPERABLE UNITS 1 AND 4UNION PACIFIC RAIL ROAD COMPANY, OG DEN, UT
LEGEND
WELL SAMPLING AND GAUGING FREQUENCY
A BIENNIAL
A FIVE YEAR
A FIVE YEAR GAUGE
A FIVE YEAR MNA
A ABAND ONED
VINYL CHLORIDE CONCENTRATION
2 µg/L
10 µg/L
GR OUNDWATER ELEVATION CONTOUR(FEET ABOVE MSL, SPRING 2022)
GR OUNDWATER FLOW DIRECTION(SPRING 2022)
NotesPlume contours based on Spring 2022 results.Aerial Imagery is Microsoft Bing Imagery.
0 500250
Feet1 inch = 500 feet
4301

Attachment 1
Sampling Logs

Attachment 2
Laboratory Reports

Attachment 3
Data Validation Report

GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 1
Data Verification Report
November 16, 2023
To Terence Mares Project No. 11183954-95-03-1990
Copy to Jesse Orth, Julie Lidstone DVR No. N/A
From Jeffrey Cloud/eew/1671 Contact No. 1 971 925 3756
Project Name Union Pacific Railroad (UPRR) Email [e-mail]
Subject Analytical Results and Data Verification of Report L1664159 Annual Sampling Event SP Yard Ogden, Utah October 2023
The services undertaken by GHD in connection with preparing this report were limited to those specifically detailed in the report and
are subject to the scope limitations set out in the report.
1.Introduction
This document details a data verification of analytical results for a water sample collected in support of the Annual Sampling Event at the SP Yard site in Ogden, Utah during October 2023. The sample was submitted to Pace National Center for Testing and Innovation, located in Mt. Juliet, Tennessee. A sample collection and analysis summary is presented in Table 1. A summary of the analytical methodology is presented in Table 2. The validated analytical results are summarized in Table 3.
Standard GHD report deliverables were submitted by the laboratory. The analytical results and supporting quality assurance/quality control (QA/QC) data were assessed. Evaluation of the data was based on information obtained from the chain of custody form, finished report forms, method blank data, recovery data from surrogate spikes, laboratory control data and field QC data.
The QA/QC criteria by which these data have been assessed are outlined in the analytical methods referenced in Table 2 and applicable guidance from the documents entitled:
1."National Functional Guidelines for Organic Superfund Methods Data Review", United States EnvironmentalProtection Agency (USEPA) 540-R-20-005, November 2020
2."National Functional Guidelines for Inorganic Superfund Methods Data Review", United States EnvironmentalProtection Agency (USEPA) 542-R-20-006, November 2020
These items will subsequently be referred to as the "Guidelines" in this report.
GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 2
2. Sample Holding Time and Preservation
The sample holding time criteria and sample preservation requirements for the requested parameters are summarized in the methods. The sample chain of custody document and analytical report were used to determine sample holding times. The sample was prepared and analyzed within the required holding times.
All sample containers were properly preserved, delivered on ice and stored by the laboratory at the required temperature (0-6°C).
3. Laboratory Method Blank Analyses
Method blanks are prepared from a purified matrix and analyzed with investigative samples to determine the existence and magnitude of sample contamination introduced during the analytical procedures.
For this study, laboratory method blanks were analyzed at a minimum frequency of one per analytical batch.
All method blank results were non-detect, indicating that laboratory contamination was not a factor for this investigation.
4. Surrogate Spike Recoveries
In accordance with the method employed, all samples, blanks, and QC samples analyzed for organics are spiked with surrogate compounds prior to sample analysis. Surrogate recoveries provide a means to evaluate the effects of laboratory performance on individual sample matrices.
The sample submitted for volatile organic compound (VOC) and 1,4-dioxane analysis was spiked with the appropriate number of surrogate compounds prior to sample analysis.
Surrogate recoveries were assessed against the control limits. All surrogate recoveries met the associated criteria.
5. Laboratory Control Sample Analyses
Laboratory control samples (LCS)/laboratory control sample duplicates (LCSD) are prepared and analyzed as samples to assess the analytical efficiencies of the methods employed, independent of sample matrix effects. The relative percent difference (RPD) of the LCS/LCSD recoveries is used to evaluate analytical precision.
For this study, LCS or LCS/LCSD were analyzed at a minimum frequency of one per analytical batch.
5.1 Organic Analyses
The LCS/LCSD contained all analytes of interest. All LCS/LCSD recoveries and RPDs were within associated control limits, demonstrating acceptable analytical accuracy and precision.
5.2 Inorganic Analyses
The LCS contained all analytes of interest. LCS recoveries were assessed per the "Guidelines". All LCS recoveries were within the control limits, demonstrating acceptable analytical accuracy.
GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 3
6. Field QA/QC Samples
The field QA/QC consisted of one trip blank sample.
To evaluate contamination from sample collection, transportation, storage, and analytical activities, one trip blank was submitted to the laboratory for analysis. All results were non-detect for the analytes of interest.
7.Analyte Reporting
Data were reported down to the laboratory’s quantitation limit (QL), which is defined as the method detection limit (MDL)with sample-specific adjustments for dilutions, aliquot size, volumes, etc. One positive analyte detection lessthan the reporting limit (RL) but greater than the QL was reported as estimated (J) in Table 3. Non-detect results werepresented as non-detect at the QL in Table 3.
8.Conclusion
Based on the assessment detailed in the foregoing, the summarized data are acceptable without qualification.
Regards
Jeffrey Cloud Data Management Team – Data Validator
Page 1 of 1
Table 1
Sample Collection and Analysis Summary
Annual Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Analysis/Parameters
Location Matrix
Collection
Date
Collection
Time An
i
o
n
s
Di
s
s
o
l
v
e
d

G
a
s
e
s
Al
k
a
l
i
n
i
t
y
VO
C
s
1,
4
-
D
i
o
x
a
n
e
Comments
(mm/dd/yyyy)(hr:min)
34-MW8 34-MW8 Water 10/06/2023 13:00 X X X X X
TB-1 --Water 10/06/2023 --X Trip Blank
Notes:
VOCs - Volatile Organic Compounds
"--"- Not Applicable
Sample
Identification
GHD 11183954-MEM-1671-Tbls.xlsx
Page 1 of 1
Table 2
Analytical Methods
Annual Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Parameter Method Matrix
Volatile Organic Compounds (VOCs)SW-846 8260B(1)Water
1,4-Dioxane SW-846 8260B SIM(1)Water
Dissolved Gases RSK-175(2)Water
Alkalinity SM 2320B(3)Water
Anions SW-846 9056A(1)Water
EPA 353.2(4)Water
Notes:
(1)- SW-846 - "Test Methods for Evaluating Solid Waste, Physical/Chemical Methods", SW-846,
Third Edition, 1986, with subsequent revisions
(2)- EPA-RSK SOP 175 - EPA Internal Standard Operating Procedure #175 dated 8/11/94
by Bryan Newell at the USEPA R.S. Kerr Laboratory
(3)- SM - "Standard Methods for the Examination of Water and Wastewater", 18th Edition, 1992,
with subsequent revisions
(4)- EPA - MCAWW - “Methods for Chemical Analysis of Water and Waste,” EPA-600/4-79-020,
revised March 1983, with subsequent revisions
SIM - Selective Ion Monitoring
GHD 11183954-MEM-1671-Tbls.xlsx
Table 3
Analytical Results Summary
Annual Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Page 1 of 1
Location ID:34-MW8
Sample Name:34-MW8
Sample Date:10/06/2023
Parameters Unit
Volatile Organic Compounds
1,1,1-Trichloroethane µg/L <0.149
1,1,2-Trichloroethane µg/L <0.158
1,1-Dichloroethane µg/L 4.91
1,1-Dichloroethene µg/L <0.188
1,2-Dichloroethane µg/L <0.0819
Benzene µg/L <0.0941
Chloroethane µg/L <0.192
Chloromethane (Methyl chloride)µg/L <0.960
cis-1,2-Dichloroethene µg/L 0.350 J
Ethylbenzene µg/L <0.137
Tetrachloroethene µg/L <0.300
trans-1,2-Dichloroethene µg/L <0.149
Trichloroethene µg/L <0.190
Vinyl chloride µg/L <0.234
Volatile Organic Compounds, SIM
1,4-Dioxane µg/L <0.597
Dissolved Gases
Ethane µg/L 4.60
Ethene µg/L <0.422
Methane µg/L 477
General Chemistry
Alkalinity, bicarbonate µg/L 604000
Alkalinity, carbonate µg/L <8450
Alkalinity, total (as CaCO3)µg/L 604000
Chloride µg/L 478000
Nitrite/Nitrate µg/L <50.0
Sulfate µg/L 28700
Notes:
< - Not detected at the associated reporting limit
J - Estimated concentration
SIM - Selective Ion Monitoring
GHD 11183954-MEM-1671-Tbls.xlsx

Data Verification Report

GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 1

November 16, 2023
To Terence Mares Project No. 11183954-95-03-1990
Copy to Jesse Orth, Julie Lidstone DVR No. N/A
From Jeffrey Cloud/eew/1673 Contact No. 1 971 925 3756
Project Name Union Pacific Railroad (UPRR) Email [e-mail]
Subject Analytical Results and Data Verification of Report L1668803 Annual Goode Lake Sampling Event SP Yard Ogden, Utah October 2023
The services undertaken by GHD in connection with preparing this report were limited to those specifically detailed in the report and
are subject to the scope limitations set out in the report.
1. Introduction
This document details a data verification of analytical results for a water sample collected in support of the Annual Goode Lake Sampling Event at the SP Yard site in Ogden, Utah during October 2023. The sample was submitted to Pace National Center for Testing and Innovation, located in Mt. Juliet, Tennessee. A sample collection and analysis summary is presented in Table 1. A summary of the analytical methodology is presented in Table 2. The validated analytical results are summarized in Table 3.
Standard GHD report deliverables were submitted by the laboratory. The analytical results and supporting quality assurance/quality control (QA/QC) data were assessed. Evaluation of the data was based on information obtained from the chain of custody form, finished report forms, method blank data, recovery data from surrogate spikes, laboratory control data and field QC data.
The QA/QC criteria by which these data have been assessed are outlined in the analytical method referenced in Table 2 and applicable guidance from the document entitled "National Functional Guidelines for Organic Superfund Methods Data Review", United States Environmental Protection Agency (USEPA) 540-R-20-005, November 2020.
2. Sample Holding Time and Preservation
The sample holding time criterion and sample preservation requirements for the requested parameter are summarized in the method. The sample chain of custody document and analytical report were used to determine the sample holding time. The sample was analyzed within the required holding time.
All sample containers were properly preserved, delivered on ice and stored by the laboratory at the required temperature (0-6°C).

GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 2

3. Laboratory Method Blank Analyses
Method blanks are prepared from a purified matrix and analyzed with investigative samples to determine the existence and magnitude of sample contamination introduced during the analytical procedures.
For this study, laboratory method blanks were analyzed at a minimum frequency of one per analytical batch.
All method blank results were non-detect, indicating that laboratory contamination was not a factor for this investigation.
4. Surrogate Spike Recoveries
In accordance with the method employed, all samples, blanks, and QC samples analyzed for organics are spiked with surrogate compounds prior to sample analysis. Surrogate recoveries provide a means to evaluate the effects of laboratory performance on individual sample matrices.
The sample submitted for volatile organic compound (VOC) analysis was spiked with the appropriate number of surrogate compounds prior to sample analysis.
Surrogate recoveries were assessed against the control limits. All surrogate recoveries met the associated criteria.
5. Laboratory Control Sample Analyses
Laboratory control samples (LCS) are prepared and analyzed as samples to assess the analytical efficiencies of the method employed, independent of sample matrix effects.
For this study, LCS were analyzed at a minimum frequency of one per analytical batch.
The LCS contained all analytes of interest. All LCS recoveries were within associated control limits, demonstrating acceptable analytical accuracy with the exception of one high tetrachloroethene recovery. The associated sample result was non-detect and was not impacted. No qualification of the data was deemed necessary.
6. Field QA/QC Samples
The field QA/QC consisted of one trip blank sample.
To evaluate contamination from sample collection, transportation, storage, and analytical activities, one trip blank was submitted to the laboratory for analysis. All results were non-detect for the analytes of interest.
7. Analyte Reporting
Data were reported down to the laboratory’s quantitation limit (QL), which is defined as the method detection limit (MDL) with sample-specific adjustments for dilutions, aliquot size, volumes, etc. Positive analyte detections less than the reporting limit (RL) but greater than the QL were reported as estimated (J) in Table 3. Non-detect results were presented as non-detect at the QL in Table 3.
GHD | Union Pacific Railroad | 11183954-95-03-1990 | Data Verification Report 3
8.Conclusion
Based on the assessment detailed in the foregoing, the summarized data are acceptable without qualification.
Regards
Jeffrey Cloud Data Management Team – Data Validator
Page 1 of 1
Table 1
Sample Collection and Analysis Summary
Annual Goode Lake Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Analysis/Parameters
Location Matrix
Collection
Date
Collection
Time VOCs Comments
(mm/dd/yyyy)(hr:min)
GOODE LAKE Goode Lake Water 10/19/2023 10:00 X
TB-1 --Water 10/19/2023 --X Trip Blank
Notes:
VOCs - Volatile Organic Compounds
"--"- Not Applicable
Sample
Identification
GHD 11183954-MEM-1673-Tbls.xlsx
Page 1 of 1
Table 2
Analytical Methods
Annual Goode Lake Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Parameter Method Matrix
Volatile Organic Compounds (VOCs)SW-846 8260B(1)Water
Notes:
(1)- SW-846 - "Test Methods for Evaluating Solid Waste, Physical/Chemical Methods", SW-846,
Third Edition, 1986, with subsequent revisions
GHD 11183954-MEM-1673-Tbls.xlsx
Table 3
Analytical Results Summary
Annual Goode Lake Sampling Event
Union Pacific Railroad (UPRR) - SP Yard
Ogden, Utah
October 2023
Page 1 of 1
Location ID:Goode Lake
Sample Name:GOODE LAKE
Sample Date:10/19/2023
Parameters Unit
Volatile Organic Compounds
1,1,1-Trichloroethane µg/L <0.149
1,1,2-Trichloroethane µg/L <0.158
1,1-Dichloroethane µg/L <0.100
1,1-Dichloroethene µg/L <0.188
1,2-Dichloroethane µg/L <0.0819
Benzene µg/L 0.238 J
Chloroethane µg/L <0.192
Chloromethane (Methyl chloride)µg/L <0.960
cis-1,2-Dichloroethene µg/L <0.126
Ethylbenzene µg/L 0.235 J
Tetrachloroethene µg/L <0.300
trans-1,2-Dichloroethene µg/L <0.149
Trichloroethene µg/L <0.190
Vinyl chloride µg/L <0.234
Notes:
< - Not detected at the associated reporting limit
J - Estimated concentration
GHD 11183954-MEM-1673-Tbls.xlsx

Attachment 4
Well Abandonment Logs
Date 9/18/2023 Weather Sunny
Well Loc ID 30‐B16(P) Field Personnel Carol Gross
Operable Unit 4 South Subcontractor RMEC
Start Time 845 End Time
Well Depth (ft) Casing Type PVC
Water Level (ft) Casing Diamter (in) 2
 Length of Casing Removed (ft)
Length of Casing Left In Place (ft)
Grout Volume Placed
Type of Grout
Existing (old) Surface 
Completion:
New Surface 
Patch:
Asphalt Asphalt
Concrete Concrete
Natural/Dirt X Natural/Dirt X
Other: Other:
Stick‐up X
Bollards (Quantity)
Flush‐Mount
Notes:Could not locate well. Surveyor on‐site on 9/19/2023 to locate well. Durbano Metals
moved debris and dug in location of the well coordinates. No PVC  or completion found. 
Monitoring Well Abandonment Form
Date 9/19/2023 Weather Sunny
Well Loc ID 33‐MW1 Field Personnel Carol Gross
Operable Unit 1 Subcontractor RMEC
Start Time 1045 End Time 1600
Well Depth (ft) 14.23 Casing Type PVC
Water Level (ft) 7.06 Casing Diamter (in) 2
 Length of Casing Removed (ft) ~4.5 feet
Length of Casing Left In Place (ft) ~13.7 feet
Grout Volume Placed approximately 1.1 gallons plus bentonite chips
Type of Grout Portland Cement 1/11
Existing (old) Surface 
Completion:
New Surface 
Patch:
Asphalt Asphalt
Concrete Concrete
Natural/Dirt X Natural/Dirt X
Other: Other:
Stick‐up X
Bollards (Quantity) 2
Flush‐Mount
Notes:Started removing bollards at 1045. Came back to site 1405 to abandon. Filled in the top 
surface with native material.
Monitoring Well Abandonment Form
Date 9/19/2023 Weather Sunny
Well Loc ID 33‐MW1FP Field Personnel Carol Gross
Operable Unit 1 Subcontractor RMEC
Start Time 1045 End Time 1600
Well Depth (ft) 24.60 Casing Type PVC
Water Level (ft) 6.97 Casing Diamter (in) 2
 Length of Casing Removed (ft) ~4.5 feet
Length of Casing Left In Place (ft) ~20 feet
Grout Volume Placed approximately 2.5 gallons plus bentonite chips
Type of Grout Portland Cement 1/11
Existing (old) Surface 
Completion:
New Surface 
Patch:
Asphalt Asphalt
Concrete Concrete
Natural/Dirt X Natural/Dirt X
Other: Other:
Stick‐up X
Bollards (Quantity) 2
Flush‐Mount
Notes:Started removing bollards at 1045. Came back to site 1405 to abandon. Filled in the top 
surface with native material.
Monitoring Well Abandonment Form
Date 9/19/2023 Weather Sunny
Well Loc ID 33‐MW4 Field Personnel Carol Gross
Operable Unit 1 Subcontractor RMEC
Start Time 930 End Time 1030
Well Depth (ft) 15.37 Casing Type PVC
Water Level (ft) 10.50 Casing Diamter (in) 2
 Length of Casing Removed (ft) ~4.5 feet 
Length of Casing Left In Place (ft) ~11 feet
Grout Volume Placed approximately 1.00 gallons + bentonite
Type of Grout Portland Cement 1/11
Existing (old) Surface 
Completion:
New Surface 
Patch:
Asphalt Asphalt
Concrete Concrete
Natural/Dirt X Natural/Dirt X
Other: Other:
Stick‐up X
Bollards (Quantity) 2
Flush‐Mount
Notes:Filled in the top surface with native material. Salvaged stick up completion and bollards. 
Monitoring Well Abandonment Form
Date 9/18/2023 Weather Sunny
Well Loc ID SPRR3‐MW2 Field Personnel Carol Gross
Operable Unit 4 North Subcontractor RMEC
Start Time 745 End Time 850
Well Depth (ft) 13 Casing Type PVC
Water Level (ft) NA ‐ well plugged Casing Diamter (in) 2
 Length of Casing Removed (ft) 8 inches which was approximately 2 feet bgs
Length of Casing Left In Place (ft) ~12 feet
Grout Volume Placed approximately 1 gallon + bentonite
Type of Grout Portland Cement 1/11
Existing (old) Surface 
Completion:
New Surface 
Patch:
Asphalt Asphalt
Concrete Concrete
Natural/Dirt X Natural/Dirt X
Other: Other:
Stick‐up
Bollards (Quantity)
Flush‐Mount X
Notes:Filled in the top surface with native material.
Monitoring Well Abandonment Form