DERR-2025-001742

Phase II Environmental Site Assessment
GIV Development - Citizens West Property
509 West 300 North
Salt Lake City, Salt Lake County,Utah
Salt Lake Brownfields Coalition Assessments
EPA Cooperative Agreement No. #95811800; ACRES ID 253591
May 26, 2023
Terracon Project No. 61217496 Task 3.28
Prepared for:
Salt Lake County
Salt Lake City, Utah
Prepared by:
Terracon Consultants, Inc
Midvale, Utah
Terracon Consultants, Inc. 6949 South High Tech Drive Midvale, Utah 84047
P [801] 545-8500 F [801] 545-8600 terracon.com
May 26, 2023
Salt Lake County Economic Development
2001 South State Street, Suite S2-100
Salt Lake City, Utah 84114-4575
Attn: Ms. Kersten Swinyard
P: 385-468-4869
E:[e-mail]
Re:Phase II Environmental Site Assessment
Salt Lake Brownfields Assessment; EPA Cooperative Agreement No. 95811800
GIV Development – Citizens West Property, 509 West 300 North, Salt Lake City, Utah
Acres ID 253591
Terracon Project No. 61217496 Task 3.28
Dear Ms. Swinyard:
Terracon Consultants, Inc. (Terracon) is pleased to submit our report for Phase II Site Investigation
activities completed at the above-referenced site. The report presents data from field activities that
included the installation of soil borings for the collection of soil and groundwater samples and the
collection of subsurface and sub-slab soil gas samples. This investigation was approved by EPA
under Cooperative Agreement No. 95811800 for Hazardous Substances commingled with
Petroleum. The assessment was guided by a Sampling and Analysis Plan (Terracon, March 6,
2023) reviewed and approved by EPA.
Quality of data was guided by the EPA-approved Community-Wide Quality Assurance Project
Plan Salt Lake Brownfields Coalition Assessments (Terracon, February 8, 2022).
Terracon appreciates this opportunity to provide environmental support services to Salt Lake
County. Should you have any questions or require additional information, please do not hesitate to
contact our office.
Sincerely,
Terracon Consultants, Inc.
Andrew Turner Amy Austin
Project Manager Authorized Project Reviewer
TABLE OF CONTENTS
Page
1.0 INTRODUCTION .................................................................................................. 1
1.1 Brownfields Setting ..............................................................................................1
1.2 Site Description and Background .........................................................................2
1.3 Standard of Care..................................................................................................2
1.4 Additional Scope Limitations ................................................................................3
1.5 Reliance ...............................................................................................................3
2.0 PHASE II SITE INVESTIGATION ........................................................................ 3
2.1 Scope ..................................................................................................................3
2.2 Sampling Process Design ....................................................................................3
2.3 Field Data Collection ............................................................................................5
2.4 Soil Sampling .......................................................................................................6
2.5 Groundwater Sampling ........................................................................................6
2.6 Soil Gas Sampling ...............................................................................................7
2.7 Field QA/QC Samples ..........................................................................................7
2.8 Equipment Decontamination ................................................................................7
2.9 Site Restoration ...................................................................................................7
3.0 LABORATORY ANALYTICAL METHODS.......................................................... 8
4.0 SUMMARY OF ANALYTICAL RESULTS............................................................ 8
4.1 Soil Data Summary ..............................................................................................9
4.2 Groundwater Data Summary................................................................................9
4.3 Soil Gas Data Summary.....................................................................................10
5.0 DATA QUALITY ASSESSMENT ....................................................................... 10
5.1 Precision ............................................................................................................11
5.2 Bias and Accuracy .............................................................................................14
5.3 Representativeness ...........................................................................................16
5.4 Comparability .....................................................................................................17
5.5 Completeness ....................................................................................................18
5.6 Sensitivity...........................................................................................................19
6.0 DATA EVALUATION ......................................................................................... 20
6.1 Soil Sample Results ...........................................................................................20
6.2 Groundwater Sample Results ............................................................................21
7.0 CONCLUSIONS AND RECOMMENDATIONS .................................................. 21
8.0 REFERENCES ................................................................................................... 22
Table 1: Summary of Soil Borings
Table 2: Analytical Method Summary
APPENDICES
Appendix A Exhibits
Exhibit 1 Topographic Site Overview
Exhibit 2 Soil Borings and Soil Gas Sampling Locations
Exhibit 3 Piezometric Surface Map
Exhibit 4 PAH Exceedances in Soil
Exhibit 5 Benzene Exceedances in Soil
Exhibit 6 Arsenic Exceedances in Groundwater
Appendix B Soil Boring Logs
Appendix C Data Summary Tables
Table C1 Metals in Soil
Table C2 VOCs and Petroleum Hydrocarbons in Soil
Table C3 Polycyclic Aromatic Hydrocarbons in Soil
Table C4 Dissolved Metals in Groundwater
Table C5 VOCs and Petroleum Hydrocarbons in Groundwater
Table C6 Polycyclic Aromatic Hydrocarbons in Groundwater
Table C7 VOCs in Soil Gas
Table C6.1 Duplicate Pair – Metals in Soil
Table C6.2 Duplicate Pair – VOCs and Petroleum Hydrocarbons in Soil
Table C6.3 Duplicate Pair – Polycyclic Aromatic Hydrocarbons in Soil
Table C6.4 Duplicate Pair – Dissolved Metals in Groundwater
Table C6.5 Duplicate Pair – VOCs and Petroleum Hydrocarbons in Groundwater
Table C6.6 Duplicate Pair – Polycyclic Aromatic Hydrocarbons in Groundwater
Appendix D Chain of Custody and Laboratory Data Sheets
PHASE II ENVIRONMENTAL SITE ASSESSMENT
Salt Lake Brownfields Assessment
EPA Cooperative Agreement No. 95811800
GIV Development – Citizens West Property, 509 West 300 North
Salt Lake City, Utah
Terracon Project No. 61217496 Task 3.28
May 26, 2023
1.0 INTRODUCTION
Terracon Consultants, Inc. (Terracon) has completed a Phase II Environmental Site Assessment
(Site Investigation) at the GIV Development – Citizens West Property (GIV) site located at 509
West 300 North, Salt Lake City, Utah (Exhibit 1). This Phase II Site Investigation was completed
with funding from the Salt Lake County Brownfields Assessment Grant following the approved
Sampling and Analysis Plan, dated March 6, 2023. A table showing the specific address and
parcel number associated with this site is presented below.
Address Parcel Acres Use
509 West 300 North 08-36-305-079 1.42 Commercial Warehouse
The GIV site is identified in EPA’s online Assessment, Cleanup, and Redevelopment Exchange
System (ACRES) as Number 253591. This property was approved for assessment by EPA under
a Site Eligibility Determination Outline (EPA Region 8, March 4, 2022).
1.1 Brownfields Setting
Salt Lake County (the Grantee) is a recipient of an EPA community-wide assessment grant to
inventory, characterize, assess, and conduct cleanup planning along with public outreach
activities for eligible Brownfield sites located within County boundaries.
A Phase I Environmental Site Assessment (ESA) was conducted on the site by Terracon in
September 2022 (Terracon, September 29, 2022) under the Brownfields Assessment Grant.
Recognized Environmental Conditions (RECs) were found on the site relating to soil and
groundwater impacts from an adjoining facility.
This investigation was guided by a Sampling and Analysis Plan (SAP) dated March 6, 2023
(Terracon, 2023) reviewed and approved by EPA. Quality of assessment data was guided by the
SAP and EPA-approved Community-Wide Quality Assurance Project Plan Salt Lake Brownfields
Coalition Assessments dated February 8, 2022 (Terracon, 2022a). The purpose of this
investigation was to define and characterize the extent of possible contamination relating to the
RECs found during the ESA.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 2
1.2 Site Description and Background
The GIV site is located at 509 West 300 North, Salt Lake City, Utah. This 1.42-acre site is currently
used mainly as an art storage warehouse and radio station.
Terracon conducted a Phase I ESA on the site in September 2022. The purpose of the Phase I
ESA was to identify Controlled Recognized Environmental Conditions (CRECs) or RECs in
connection with the site. The following CRECs and RECs were identified in connection with the
site:
Soil and groundwater impacts from adjoining closed Leaking Underground Storage
Tank (LUST) facility:A west-adjoining petroleum underground storage tank (UST)
release has impacted groundwater and soil that extends onto the site with total petroleum
hydrocarbons in the diesel-range (TPH-DRO) at concentrations above Initial Screening
Levels (ISLs). Soil impacts are present at depths greater than 8 feet below ground surface
(bgs). The soil and groundwater impacts represent a CREC to the site.
Soil impacts from adjoining historic industrial uses:The site adjoins historical and
present-day railroad tracks which have been associated with impacts to soil with heavy
metals and polycyclic aromatic hydrocarbons (PAHs). Due to the redevelopment planned
for the southern portion of the site, and the proximality to a large railyard, the potential
impacts from the railroad represent a REC to the site.
Based on the findings of the ESAs, Terracon recommended an additional investigation (Phase II
Investigation) to evaluate subsurface conditions relating to the identified RECs. The Phase II ESA
scope of work included advancement of eight investigation borings for collection of soil and
groundwater samples near features of concern discussed in the Phase I ESA. Additionally, two
borings were advanced for subsurface soil gas sample collection and two sub-slab vapor pins
were installed for sub-slab soil gas sample collection.
It is anticipated that the southern portion of the property will be redeveloped for multi-family
residential use.
1.3 Standard of Care
Terracon’s services were performed in a manner consistent with generally accepted practices of
the profession undertaken in similar studies in the same geographical area during the same time.
Terracon makes no warranties, either express or implied, regarding the findings, conclusions, or
recommendations. Please note that Terracon does not warrant the work of laboratories,
regulatory agencies, or other third parties supplying information used in the preparation of the
report. These Phase II services were performed in accordance with the scope of work agreed with
you, our client, as reflected in our proposal and consistent with ASTM E1903-11,Standard
Practice for Environmental Site Assessments: Phase II Environmental Site Assessment.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 3
1.4 Additional Scope Limitations
Findings, conclusions, and recommendations resulting from these services are based upon
information derived from the on-site activities and other services performed under this scope of
work; such information is subject to change over time. Certain indicators of the presence of
hazardous substances, petroleum products, or other constituents may have been latent,
inaccessible, unobservable, non-detectable, or not present during these services. We cannot
represent that the site contains no hazardous substances, toxic materials, petroleum products, or
other latent conditions beyond those identified during this Phase II investigation. Subsurface
conditions may vary from those encountered at specific borings or wells or during other surveys,
tests, assessments, investigations, or exploratory services. The data, interpretations, findings,
and our recommendations are based solely upon data obtained at the time and within the scope
of these services.
1.5 Reliance
This report has been prepared for the exclusive use of Salt Lake County. Any authorization for
use or reliance by any other party (except a governmental entity having jurisdiction over the site)
is prohibited without the express written authorization of Salt Lake County and Terracon. Reliance
by authorized parties will be subject to the terms, conditions, and limitations stated in the
underlying contract between Salt Lake County and Terracon. The limitation of liability defined in
the terms and conditions is the aggregate limit of Terracon’s liability to all relying parties unless
otherwise agreed in writing.
2.0 PHASE II SITE INVESTIGATION
2.1 Scope
The proposed Phase II Site Investigation scope of work described in the SAP was intended to
gather the necessary data to evaluate the potential environmental impacts related to the CREC
and REC described in the ESA. These activities were conducted in accordance with the site-
specific SAP that was prepared and approved by EPA for this site. The SAP established specific
site objectives, sampling process design, and details regarding site-specific sampling and
analyses, and was used in conjunction with the EPA-approved QAPP.
2.2 Sampling Process Design
The sampling strategy was designed to evaluate and characterize impacts to soil, groundwater,
and soil vapor related to the RECs identified on the GIV site.
Eight soil borings were advanced at the site using standard or limited-access direct-push drilling
equipment to allow for the collection of subsurface soil and groundwater samples. The boring
locations are shown on Exhibit 2. The soil borings were advanced to a maximum depth of
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 4
approximately 15 feet below grade surface (bgs) to allow sufficient water to collect groundwater
samples.
Two borings (SV-1 and SV-2) were advanced to five feet bgs for the installation of soil gas probes.
Two sub-slab vapor points (SS-1 and SS-2) were installed in the southern portion of the building
for soil gas analysis.
Soil samples were collected from multiple intervals in each soil boring as discussed in the SAP.
Samples to be analyzed for Resource Conservation and Recovery Act (RCRA) 8 metals and
polycyclic aromatic hydrocarbons (PAHs) were collected from the shallow soil at the probable
most impacted depth interval (field-identified based on staining, debris, etc.). Samples for total
petroleum hydrocarbons (TPH) gasoline-range organics (GRO), TPH diesel-range organics
(DRO) and volatile organic compounds (VOCs) were collected from each soil boring at the most
impacted depth interval (field-identified based on photo ionization detector - PID readings,
staining, debris observations, etc.). One groundwater sample was collected at each of the boring
locations and analyzed for dissolved metals, TPH-GRO, TPH-DRO, VOCs, and PAHs. Soil gas
samples from the soil gas probes and sub-slab vapor points were analyzed for VOCs. Field
duplicates for soil and groundwater were collected at rate of 10 percent with one (1) trip blank
(laboratory-supplied blank) per site. Therefore, one (1) trip blank per shipment of samples, and
one field duplicate soil sample and one field duplicate groundwater sample per analytical method
were collected.
Soil boring logs are provided in Appendix B.Tables C1 through C7 (Appendix C) present the
results of the soil, groundwater, and soil gas sampling. The drilling and sampling locations are
depicted on Exhibit 2 (Appendix A), which shows the locations of both the soil borings and soil
gas sampling points.
After sample collection was completed, each boring was properly abandoned by backfilling with
bentonite clay, adding water to hydrate the bentonite clay, and restoring the surface with concrete,
asphalt, or native soil as appropriate to match the surrounding area. The sub-slab vapor points
were removed, and the hole was filled and the surface was completed with Quickrete. Samples
were delivered to the analytical laboratory within holding times for all analytical methods to
generate definitive analytical data, which are critical to this assessment.
Table 1 below provides a summary description of the soil, groundwater, and soil gas sample
locations, sample types, sample naming convention, laboratory analyses, and sampling rationale.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 5
Table 1
Summary of Soil Borings, Groundwater Sampling Points, and Soil Gas Sampling Points
Sample
Location Rationale Sample ID Sample
Matrix Analytes
Eastern
portion of the
property
Determine if there
are impacts related
to adjoining historic
rail line
SB-1, SB-4, SB-7 Soil and
Groundwater
TPH-GRO, TPH-DRO,
VOCs, RCRA 8 Metals,
PAHs (SIM)
Western and
northern
portions of site
Further define and
delineate known
impacts from
petroleum
hydrocarbons from
adjoining property
SB-2, SB-3, SB-5,
SB-6, and SB-8
Soil and
Groundwater
TPH-GRO, TPH-DRO,
VOCs, RCRA 8 Metals,
PAHs (SIM)
Soil Gas
Probes and
Sub-Slab Soil
Gas Points
Delineate potential
presence of VOCs
from historic
gasoline service
station operations
SV-1, SV-2, SS-1,
SS-2 Soil Gas VOCs
Metals samples in groundwater were field-filtered.
2.3 Field Data Collection
Prior to conducting the work, the public utility location service (Blue Stakes of Utah) was notified
at least 48 hours prior to commencing drilling activities. A private utility location service was used
to locate potential utilities and other subsurface obstacles in the immediate vicinity of each boring
and soil gas probe location.
Terracon conducted the field investigation on April 14, 2023. The mechanized drilling services
were performed by Utah-licensed well driller Direct Push Services. Terracon environmental
personnel directed and supervised the drilling activities, logged the soil borings, and collected
field samples. Soil gas samples were collected on April 17 and April 19, 2023.
During advancement of the eight soil borings, soils were continuously cored in five-foot intervals
and observed to document subsurface soil types, color, relative moisture content, and sensory
evidence of environmental impacts. The soil samples were field-screened using a portable PID
Mini Rae 3000 PID equipped with a 10.6-eV ultraviolet lamp to evaluate the potential presence of
total volatile organic compounds (TVOCs). The unit measures TVOCs in sample headspace air
relative to parts per million calibration gas equivalents in air and identified simply as “PPM” on soil
boring logs.
Native soils consisted mostly of silt and sand. No elevated PID readings or obvious impacts were
noted in the soil borings while conducting the work. Detailed lithological descriptions and PID
readings are included on the soil boring logs provided in Appendix B. Groundwater was
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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encountered between approximately 7 and 11 feet bgs during boring installation. Three temporary
piezometers were installed at the site (SB-2, SB-3, and SB-8) in order to determine relative
groundwater elevations and calculate approximate groundwater flow direction. The groundwater
flow direction was determined to be generally toward the northeast (Exhibit 3).
Subsurface soil gas probes were set to approximately 5 feet bgs, using direct-push methods. The
probes were constructed of 6-inch GeoProbe stainless-steel screens (or equivalent), with ¼-inch
(outer diameter) polyethylene tubing connected to the probe that extended to the ground surface.
A sand pack was placed around the probe from the total depth of the boring to approximately 1
foot above the probe. The borehole was then sealed with hydrated bentonite from the top of the
sand pack to the ground surface.
Sub-slab soil gas sampling points were installed using a portable electric hammer drill to drill a
5/8-inch-hole through the concrete slab. Following the manufacturer’s standard operating
procedures, a Vapor Pin™ sub-slab soil gas sampling device was installed in each of the holes.
Following installation, the subsurface soil gas probes and sub-slab sampling points were allowed
to equilibrate for a minimum of twenty-four hours prior to sampling. Prior to sample collection,
Terracon conducted leak detection tests at each sample location. If leak tests indicated there was
potential breakthrough in the sampling train all connections were re-examined and tightened
where necessary and re-tested.
The soil gas samples were in laboratory-supplied, batch-certified clean 1,000-mL Summa®
canisters, using new Teflon® tubing and a flow regulator that restricts flow to no more than 200
mL per minute. Following the collection of the samples, the soil gas probes and sub-slab sampling
points were removed.
2.4 Soil Sampling
Soil samples were collected from each of the direct-push borings following the procedures
detailed in Standard Operating Procedure (SOP) 5, Geoprobe Sampling, which is provided in
Appendix B of the EPA-approved QAPP. During advancement of the borings, soils were logged
as detailed in SOP 1, Soil Sampling and Logging, provided in Appendix B of the EPA-approved
QAPP.
2.5 Groundwater Sampling
Groundwater samples were collected from each of the direct-push borings following the
procedures detailed in SOP 5, Geoprobe Sampling, provided in Appendix B of the EPA-approved
QAPP.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 7
2.6 Soil Gas Sampling
Soil gas samples (from soil gas probes and sub-slab vapor points) were collected following the
procedures detailed in Terracon SOP 9,Soil-gas/Vacuum Probe Installation, and Terracon SOP
9A,Soil Gas Sampling, provided in Appendix C of the SAP.
2.7 Field QA/QC Samples
Field duplicate samples for soil and groundwater were collected at a minimum rate of 10 percent
per analyte. A total of sixteen soil samples (eight samples per analyte) and eight groundwater
samples were collected excluding duplicates. For this investigation, one field soil and groundwater
duplicate for each analytical method were collected. The duplicates were given a fictitious
identification so that the laboratory would be unaware of their duplicate status. A duplicate was
not collected for the soil gas analysis.
A summary of the soil and groundwater duplicates collected is below:
Soil Samples
Sample ID Duplicate ID Analytes
SB-8-2-3 SB-108-2-3 Metals, PAHs
SB-8-12-13 SB-108-12-13 TPH-GRO, TPH-DRO, VOCs
Groundwater Samples
Sample ID Duplicate ID Analytes
SB-8 SB-108 Metals, PAHs, TPH-GRO, TPH-
DRO, VOCs
One trip blank (laboratory supplied blank) was included in the shipments with the samples
submitted for analysis of VOCs.
2.8 Equipment Decontamination
Clean disposable, single-use sampling equipment was used to conduct the soil, groundwater, and
soil gas sampling and was properly disposed of after each use. Drilling equipment was cleaned
using a high-pressure washer prior to beginning the project and between boring locations.
2.9 Site Restoration
After sample collection was completed, each boring was properly abandoned by backfilling with
bentonite clay pellets, adding water to hydrate the bentonite clay, and restoring the surface with
existing soil, asphalt, or concrete patch as appropriate to match the surrounding area. Sub-slab
soil vapor points were backfilled and finished with Quickrete.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 8
3.0 LABORATORY ANALYTICAL METHODS
All soil and groundwater samples (including field duplicates and trip blank) were placed in iced
coolers. The samples were shipped in iced coolers under chain-of-custody protocols via overnight
courier to Pace Analytical Laboratories in Mt. Juliet, Tennessee (a Utah-Certified Laboratory). Soil
gas samples were appropriately packaged and shipped under chain-of-custody protocols via
overnight courier to Pace Analytical Laboratories in Mt. Juliet, Tennessee (a Utah-Certified
Laboratory).
Samples were analyzed using the following methods:
TABLE 2: ANALYTICAL METHOD SUMMARY
Parameter Matrix Analytical Method No. of
Samples1
TPH-DRO Soil SW-846 8015 9
VOCs, TPH-GRO Soil SW-846 8260 9
RCRA 8 Metals Soil SW-846 6010B, 7471 9
PAHs Soil SW-846 8270 9
TPH-DRO Groundwater SW-846 3511/8015 9
VOCs, TPH-GRO Groundwater SW-846 8260B 10
RCRA 8 Metals Groundwater SW-846 6020, 7470 A 9
PAHs Groundwater SW-846 8270 9
1Includes field duplicate and trip blank samples. Trip blank sample was only analyzed for VOCs.
4.0 SUMMARY OF ANALYTICAL RESULTS
The following sections summarize analytical results. A summary of the analytical results is
provided in Tables C1 through C7 (Appendix C). Copies of the Pace analytical reports and
sample chain-of-custody records are provided in Appendix D.
Constituent concentrations in soils were compared to current EPA Regional Screening Levels
(RSLs) for Residential and Industrial use scenarios and the Utah Department of Environmental
Quality (UDEQ) Leaking Underground Storage Tank (LUST) Initial Screening Levels (ISLs) and
Tier 1 Screening Levels for petroleum hydrocarbons in soil.
Constituent concentrations in groundwater were compared to EPA Maximum Contaminant Levels
(MCLs), EPA Vapor Intrusion Screening Levels (VISLs) for Residential and Commercial use
scenarios, UDEQ Leaking Underground Storage Tank (LUST) Initial Screening Levels (ISLs) and
Tier 1 Screening Levels for petroleum hydrocarbons in groundwater, and the Utah Ground Water
Quality Standards (UGWQS; UAC-R317-6-2.1).
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 9
Constituent concentrations in soil gas were compared to EPA target Sub-Slab Soil Gas
Concentrations and VISLs for Residential and Commercial use scenarios.
4.1 Soil Data Summary
RCRA 8 Metals: Arsenic concentrations exceeded the EPA Industrial RSL of 3 mg/kg in all
shallow soil samples, with the highest reported arsenic concentration at 11.3 mg/kg. As arsenic
in soils is naturally elevated in the Salt Lake Valley, the concentrations reported were not identified
to be a source of a release of arsenic originating from the site. No samples exceeded a RSL for
any other metal. RCRA 8 Metals results in soil are shown in Table C1.
PAHs:Benzo(a)pyrene exceeded the Residential RSL in shallow soil in four of the samples and
the duplicate. The Industrial RSL was not exceeded. No other PAHs exceeded a regulatory
screening level. PAH results in soil are shown in Table C2.
TPH and VOCs:Multiple VOCs and petroleum hydrocarbons were reported in all soil samples
collected from the site. Benzene from the duplicate soil sample (SB-108-12-13) slightly exceeded
the UDEQ ISL of 0.2 mg/kg. The original sample (SB-8-12-13) did not exceed this regulatory
screening level. No other petroleum hydrocarbons or VOCs exceeded a screening level. TPH and
VOC results in soil are shown in Table C3.
A list of soil exceedances for this recent Phase II Investigation is below.
Sample Analyte Exceedance
SB-2-2.5-4 Benzo(a)pyrene Residential RSL
SB-3-1-2 Benzo(a)pyrene Residential RSL
SB-4-1-1.5 Benzo(a)pyrene Residential RSL
SB-8-2-3 Benzo(a)pyrene Residential RSL
SB-108-2-3 Benzo(a)pyrene
Benzene
Residential RSL
UDEQ ISL
Exhibit 4 and Exhibit 5 display the soil sample locations that exceed a screening level.
4.2 Groundwater Data Summary
RCRA 8 Metals: Dissolved arsenic was detected in SB-2 at 0.0146 mg/l and SB-4 at 0.0114
mg/l, slightly above the EPA MCL of 0.01 mg/l but below the UGWQS limit of 0.05 mg/l. All other
groundwater samples were well below the MCL and UGWQS for all dissolved metals. RCRA 8
Metals results in groundwater are shown in Table C4.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 10
PAHs:No PAHs in groundwater exceeded a regulatory screening level. Between one and three
PAHs were reported in four samples but were below regulatory screening levels when
established. PAH results in groundwater are shown in Table C5.
TPH and VOCs: Low concentrations of petroleum hydrocarbons and VOCs were reported in a
few select groundwater samples collected at the site, including TPH-DRO, benzene, chloroform,
dibromomethane, cis-1,2-dichloroethene, and trans-1,2-dichloroethene, but were all below
regulatory screening levels. No other VOCs exceeded a regulatory screening level. A list of
groundwater samples that exceeded a regulatory screening level during this investigation is
shown below. TPH and VOC results in groundwater are shown in Table C6.
Sample Analyte Exceedance
SB-2 Arsenic MCL
SB-8 Arsenic MCL
Exhibit 6 displays the groundwater sample locations that exceed a screening level.
4.3 Soil Gas Data Summary
Multiple VOCs were detected in each of the soil gas (vapor probe and sub-slab vapor point)
samples collected. However, the concentrations reported were all well below any regulatory
screening level. Soil gas sample results are shown in Table C7.
5.0 DATA QUALITY ASSESSMENT
All laboratory analytical data were subject to internal reduction and validation prior to external
release of the data, as detailed in the laboratory’s Quality Assurance Manual. Following receipt
of the laboratory analytical results by Terracon, the data were reviewed to evaluate compliance
with Data Quality Indicators (DQIs) outlined in Sections D1, D2, and D3 of the QAPP.
Documentation provided with the laboratory analytical results reports included a case narratives;
analytical data with minimum method detection limits (MDLs) and reported detection limits (RDLs)
reporting limits listed for all analyses; surrogate recoveries for GC/MS analyses with laboratory
control limits; chain-of-custody records; and a quality control summary, including method blanks,
matrix spike/matrix spike duplicates (MS/MSD) with control limits, laboratory control samples and
duplicates (LCS/LCSD) with control limits; and application of data qualifiers where warranted.
Assessment of the DQIs for Precision, Bias and Accuracy, Representativeness, Comparability,
Completeness, and Sensitivity are presented in the following subsections. The laboratory results
are assumed to be in control and the data is useable as presented unless specifically described
below.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 11
5.1 Precision
Precision was evaluated on the basis of relative percent difference (RPD) as a measure of
reproducibility between LCS/LCSD pairs and MS/MSD pairs (analytical precision) and between
field samples and field duplicate samples (field precision).
The RPD is calculated to evaluate precision using the following equation.
RPD =𝑿𝟎−𝑿𝟎
ቀ𝑿𝟎+𝑿𝟎
𝟎ቁ
𝒙𝟎𝟎𝟎Where X1 and X2 are the reported concentrations of the samples
being evaluated.
5.1.1 Analytical Precision
A summary of the Quality Control assessment for analytical precision is presented below.
Laboratory Set L1606384 (Soil Samples):
The RPD for the MSD associated with barium (Laboratory Batch WG2044947), the
MSD associated with bromoform, chlorodibromomethane, cis-1,3-
dichloropropene, styrene, and trans-1,3-dichloropropene (Laboratory Batch
WG2047344), the MSD associated with 57 VOC analytes (Laboratory Batch
WG2048144), and the MSD associated with 18 PAHs (Laboratory Batch
WG2044904) were outside the laboratory’s control limits. As a result, a J3 flag was
used to qualify this data. The affected soil samples were well below regulatory
screening levels with the exception of benzene in duplicate sample SB-108-12-13
and benzo(a)pyrene in three samples which exceeded the Residential RSL. To be
conservative, this exceedance for benzene is considered valid and usable.
Unaffected samples also exceeded the Residential RSL for benzo(a)pyrene.
Additionally, other DQIs were considered acceptable. It is not anticipated this
analytical precision issue will affect the conclusions of this report.
Laboratory Set L1606417 (Groundwater Samples):
No precision issues were identified by the laboratory.
Laboratory Set L1607510 (Soil Gas Samples):
No precision issues were identified by the laboratory.
Based on the results of the RPD analyses of the MS/MSD and LCS/LCSD and the evaluation
provided above,analytical precision is considered within control for Laboratory Sets
L1606384, L1606417, and L1607510 (Soil, Groundwater, and Soil Gas Samples).
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 12
5.1.2 Field Precision
A total of one soil and one groundwater duplicate pairs were collected and analyzed per laboratory
method. A summary of the Quality Control assessment for field precision is presented below.
Per the QAPP, analytical results for original samples and field duplicate pairs that are less than
five times the laboratory’s Reported Detection Limit (RDL) in the analytical reports were
considered within control if the difference between the sample concentration and its duplicate was
less than two times the RDL. When analytical results for the original sample and the field duplicate
pairs are greater than five times the RDL, the duplicate pair was considered within control when
the RPDs for the field duplicate pairs were within the QAPP’s control limits (50% for solid samples
and 25% for groundwater samples).
Laboratory Set L11606384 (Soil Samples):
RCRA 8 Metals in Soil (Table C6.1)
Reported concentrations for lead in duplicate pair SB-8-2-3/SB-108-2-3 had an
RPD value (57.4%) over the 50% QAPP control limits. This pair is considered not
in control. Lead results for all soil samples were below regulatory screening levels
and other DQIs were in control. It is unlikely that lead outside of control limits has
an effect on the conclusions of this report.
TPH and VOCs in Soil (Table C6.2)
Reported concentrations for benzene, ethylbenzene, 1,2,4-trimethylbenzene, and
xylenes in duplicate pair SB-8-2-3/SB-108-2-3 had RPD values (64.5%, 71.4%,
54.5%, and 62.4%, respectively) over the 50% QAPP control limit. These pairs are
not considered in control. All these detected analytes in these samples have
concentrations orders of magnitude below regulatory screening levels with the
exception of benzene. The concentration of benzene in the duplicate sample
slightly exceeds the UDEQ DERR ISL where the original sample is below this
value. To be conservative, this higher concentration is used when analyzing the
data. As a result, it is unlikely that these VOCs being outside of control limits has
an effect on the conclusions of this report.
Reported concentrations of isopropylbenzene, n-propylbenzene, and 1,3,5-
trimetholbenzene in duplicate pair SB-8-2-3/SB-108-2-3 are not considered within
control because both samples were less than 5 x RDL but the difference between
the results was greater than 2 x RDL. These samples were orders of magnitude
below any regulatory screening levels as were all samples collected. Additionally
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 13
other DQIs were in control. It is unlikely that these analytes being outside of control
limits has an effect on the conclusions of this report.
Reported concentrations of acetone in duplicate pair SB-8-2-3/SB-108-2-3 are not
considered within control because the original sample was below the RDL but the
duplicate was less than 5 x RDL where the difference between the results was
greater than 2 x RDL (using ½ RDL for the original concentration to be
conservative). These samples were orders of magnitude below any regulatory
screening levels as were all samples collected. Additionally, acetone is not
considered a contaminant of concern for the site. It is unlikely that this analyte
being outside of control limits has an effect on the conclusions of this report.
PAHs in Soil (Table C6.3)
Reported concentrations of acenaphthylene in duplicate pair SB-8-2-3/SB-108-2-
3 are not considered within control because the original sample was below 5 x
RDL but the duplicate was less than RDL where the difference between the results
was greater than 2 x RDL (using ½ RDL for the duplicate concentration to be
conservative). There is no regulatory screening level for this analyte, and
acenaphthylene not considered a contaminant of concern for the site. It is unlikely
that this analyte being outside of control limits has an effect on the conclusions of
this report.
RCRA 8 Metals in Groundwater (Table C6.4)
All RCRA 8 Metals concentrations in the duplicate pairs are considered within
control.
TPH and VOCs in Groundwater (Table C6.5)
All TPH and VOC concentrations in the duplicate pairs are considered within
control.
PAHs in Groundwater (Table C6.6)
All PAH concentrations in the duplicate pairs are considered within control.
Based on the results of the RPD analyses of the field duplicate sample pairs in soil and
groundwater and the evaluation provided above,field precision is considered within control
for Laboratory Sets L1606384 and L1606417 (Soil and Groundwater Samples) with the exception
of the minor discrepancies discussed above.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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5.2 Bias and Accuracy
Bias and Accuracy were evaluated through a review of the surrogate recoveries, method blanks,
trip blanks, percent recoveries for LCS/LCSD, and percent recoveries for MS/MSD summaries
provided by the laboratory. Method blanks and trip blanks were considered within control (i.e.,
accuracy) if the constituents analyzed were less than the analytical method reporting limits.
LCS/LCSD and MS/MSD analyses were considered within control if the percent recoveries were
within the laboratory’s established limits (i.e.,bias). A summary of the Quality Control assessment
for Bias and Accuracy is presented below.
Laboratory Set L1606384 (Soil Samples):
Accuracy–Method Blank: All analytes in the method blanks were less than the
laboratory RDLs. The method blank for selenium (Batch WG2044947) was
detected in an estimated concentration (J value). No affected samples had
concentrations above the RDL. This is not expected to affect the usability of this
data.
Accuracy–Trip Blank: A trip blank was submitted during this investigation. The
trip blank had no detections above the RDL or estimated (J value) detections.
Surrogate Recoveries: The surrogate recovery limit for toluene-d8 (Batch
WG2047344) was exceeded, causing values to be outside the upper control limits.
A J1 flag was assigned to this data. Other surrogate recoveries were within range
and detected results in the affected sample were well below regulatory screening
levels.
Bias–LCS Percent Recoveries:No LCS bias issues were noted by the
laboratory.
Bias–MS/MSD Percent Recoveries:The percent recovery for the MS for
selenium (Batch WG2045151), the MS/MSD for cis-1,3-dichloropropene, styrene,
and trans-1,3-dichloropropene (Batch WG2047344), and the MS/MSD for 1,2,4-
trimethylbenzene, ethylbenzene, naphthalene, styrene, and xylenes (Batch
WG2048144) interfered with the ability to make any accurate determination,
causing a low spike value. A J6 qualifier was applied to this data. The affected
samples had concentrations of these analytes well below regulatory screening
levels. This is not expected to affect the usability of the data.
The MS for barium (Batch WG2044947), MS for chromium (Batch WG2045151),
the MS/MSD for acetone (Batch WG2047344), and the MS/MSD for eleven PAHs
(Batch WG2044904) interfered with the ability to make any accurate determination,
causing a high spike value. A J5 qualifier was applied to this data. The affected
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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soil samples were detected well below regulatory screening levels. This is not
expected to affect the usability of the data.
Laboratory Set L1606417 (Groundwater Samples):
Accuracy–Method Blank: All analytes in the method blanks were less than the
laboratory RDLs. Selenium (Batch WG2044515) and chromium (Batch
WG2044517) were detected in the method blanks. No affected samples had
concentrations above the RDL. This is not expected to affect the usability of this
data.
Accuracy–Trip Blank: A trip blank was submitted during this investigation. The
trip blank had no detections above the RDL or estimated (J value) detections.
Surrogate Recoveries: The surrogate recovery limit for o-terphenyl in the
laboratory blank (Batch WG2044909) was exceeded, causing values to be outside
the upper control limits. A J1 flag was assigned to this data. The affected TPH-
DRO sample was not-detected and all TPH-DRO samples were detected below
the RDL.
The surrogate recovery limit for 2-fluorobiphenyl and p-terphenyl-d14 (Batch
WG2044429) was exceeded, causing values to be outside the lower control limits.
A J2 flag was assigned to this data. The affected PAHs in the affected sample
were all non-detect, and other surrogate recoveries were within range.
Bias–LCS/LCSD Percent Recoveries:The percent recoveries for the LCS/LCSD
for benzo(a)pyrene (Batch WG2044476) was above the established quality control
range for accuracy. A J4 qualifier was applied to this data. This analyte was not
detected in the affected samples or any other groundwater sample. This is not
expected to affect the usability of this data.
Bias–MS/MSD Percent Recoveries:The percent recovery for the MS/MSD for 2-
chloroethyl vinyl ether (Batch WG2045995) interfered with the ability to make any
accurate determination, causing a low spike value. A J6 qualifier was applied to
this data. The affected samples had non-detect concentrations of this analyte
which is not considered a contaminant of concern at the site. This is not expected
to affect the usability of the data.
Laboratory Set L1607510 (Soil Gas Samples):
No bias or accuracy issues were noted by the laboratory.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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Bias and Accuracy are considered within control for Laboratory Sets L1606384, L1606417,
or L1607510. Some minor exceptions exist but are not expected to have an impact on the usability
of the results.
5.3 Representativeness
Representativeness is a qualitative parameter most concerned with proper design and execution
of the sampling program to produce data that accurately and precisely represent environmental
conditions. Selection of analytical methods, sampling methods, and locations representative of
the media sampled were set forth in the SAP.Representativeness in the field was achieved by
implementing the approved SAP and using appropriate sampling methods, sample containers,
sample handling, and preservation methods.Representativeness in the laboratory was achieved
by using the proper analytical procedures, meeting sample holding times, and analyzing and
assessing laboratory QA/QC samples.
Field Representativeness
Sampling was conducted in general accordance with the Sampling and Analysis Plan (SAP) and
associated Standard Operating Procedures. The following deviations from the SAP occurred
during the sampling event.
A few borings were moved slightly to accommodate drill rig access or avoid identified
utilities. It is unlikely that small changes in the locations of these borings had a
significant effect on data quality.
Soil vapor probe SV-1 was moved to the south due to drill rig refusal in multiple
locations further north. This location is still well within the planned footprint of the
planned redevelopment, and it is unlikely that this move had a significant effect on data
quality.
Soil vapor samples were collected over two days due to sampling issues involving the
lab-provided Summa canisters. However, these locations still had adequate time to
equilibrate and samples were collected per the approved SOP. It is unlikely that this
issue had a significant effect on data quality.
Laboratory Representativeness
Sample analyses followed the analytical methods listed in the SAP or equivalent EPA-approved
variations of the listed methods.
The laboratory noted that the MS/MSD for toluene and multiple PAHs exceeded the
upper limit of the calibration range of the instrument established by the initial calibration
(ICAL). An E value was assigned to this data. Other DQIs were in control, and all
analytes were well below regulatory screening levels except for benzo(a)pyrene that
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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had multiple exceedances above the Residential RSL. This issue is not expected to
have an effect on the usability of the data.
The laboratory noted that the sample concentration was too high to evaluate spike
recoveries for benzene and toluene in soil in the MS/MSD (Batches WG2047344 and
WG2048144). A V value was assigned to this data. One of these samples (duplicate
sample SB-108-12-13) exceeded the UDEQ ISL for benzene. To be conservative, this
value is assumed to be accurate and exceeding this screening level. This issue is not
expected to have an effect on the usability of the data. Additionally, the sample
concentration in the MS/MSD (Batch WG2044904) was too high to evaluate spike
recoveries for several PAHs in soil A V value was assigned to this data. These PAHs
were detected well below regulatory screening levels in all analytes except
benzo(a)pyrene which had exceedances in both affected and unaffected samples.
This is not expected to affect the usability of the data.
All soil and groundwater samples were submitted at one time using one chain-of-
custody. However, the laboratory issued separate reports for the soil and groundwater
samples. This issue is not expected to have an effect on the usability of the data.
A MS/MSD sample for some of the metals analyses in soil and groundwater was not
from a field provided sample. Other DQIs were in control, and a LCS sample was run.
This issue is not expected to have an effect on the usability of the data.
No MS/MSD sample was run for PAHs in groundwater. PAHs were all well below
regulatory screening levels and other DQIs were in control. This issue is not expected
to have an effect on the usability of the data.
A LCSD sample was not analyzed for any of the soil analyses. A LCS sample was
analyzed and had no qualifiers. This issue is not expected to have an effect on the
usability of the data.
Sample analyses followed the analytical methods listed in the SAP or equivalent EPA-
approved methods or variations of the listed methods; and were analyzed within
method specified holding times.
Representativeness is considered within control with the minor deviations noted.
5.4 Comparability
Comparability is a qualitative term expressing the confidence with which one data set can be
compared to another. The comparability goal was achieved using standardized sampling
procedures in accordance with the SAP and QAPP, use of standardized and approved laboratory
analytical methods, and reporting the analytical results in appropriate and consistent units.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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Sampling was conducted in general accordance with the Sampling and Analysis Plan
(SAP) and associated Standard Operating Procedures. Deviations from the SAP
occurred during the sampling event and are discussed in Section 5.3.
Sample analyses followed the analytical methods listed in the SAP or equivalent
methods or EPA-approved variations of the listed methods.
The units of measure reported by the laboratory were consistent with the units of
measure used by the regulatory screening levels.
The number of field duplicates specified in the approved SAP was at least 10% of the
field samples.
RCRA 8 Metals in Soil: One field duplicate for eight soil samples or 12.5%, which
exceeds the 10% goal.
TPH and VOCs in Soil:One field duplicate for eight soil samples or 12.5%, which
exceeds the 10% goal.
PAHs in Soil: One field duplicate for eight soil samples or 12.5%, which exceeds
the 10% goal.
RCRA 8 Metals in Groundwater: One field duplicate for eight soil samples or
12.5%, which exceeds the 10% goal.
TPH and VOCs in Groundwater:One field duplicate for eight soil samples or
12.5%, which exceeds the 10% goal.
PAHs in Groundwater: One field duplicate for eight soil samples or 12.5%, which
exceeds the 10% goal.
Comparability is considered within control.
5.5 Completeness
Completeness is the ratio of valid measurements to the number of planned measurements,
expressed as a percentage, and the completeness goal for the project is 90%. The sampling
program is deemed to meet the DQIs for valid measurements. Minor exceptions exist as
described above, but none are expected to affect the usability of the data or the conclusions of
this report. The samples collected were submitted and analyzed by the laboratory according to
the chain-of-custody. Additionally, the data collection followed the procedures and requirements
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 19
as described in the approved QAPP and SAP. The data are considered usable as qualified. The
analytical completeness for this sampling event was 100%.
The SAP detailed nine shallow soil samples for RCRA 8 Metals and PAHs (including
duplicates), nine deeper soil samples for TPH and VOCs (including duplicates), nine
groundwater samples (including duplicates), four soil gas samples, and one trip blank.
All of these samples were collected during this investigation. Therefore, the sample
completeness score is 100% exceeding the 90% project goal.
With acknowledgement of qualified results for the analytes listed above, the analytical data
are acceptable for their intended use to evaluate constituent concentrations compared to
applicable regulatory screening levels.
5.6 Sensitivity
Sensitivity refers to the capability of a method or instrument to discriminate between measurement
responses representing different levels of the variable of interest. The sensitivity goal is for RDLs
to be below comparative screening levels, which vary considerably by analyte and in value and
applicability. Overall, the level of sensitivity was sufficient to allow the identification of soil and
groundwater constituents above applicable regulatory screening levels.
Laboratory Set L1606384 (Soil Samples):
RCRA 8 Metals (Table C1): The RDLs were all less than RSLs for analytes
reported as less than the RDL, as applicable, for analytes reported as less than
the RDL.
TPH and VOCs (Table C2): The RDLs were all less than RSLs and Utah ISLs for
analytes reported as less than the RDL, as applicable, for analytes reported as
less than the RDL. The only exception was 1,2-dibromo-3-chloropropane which
exceeded the Residential RSL. No samples had detections of this analyte, and it
is not considered a contaminant of concern at the site. This sensitivity issue for is
not anticipated to affect the conclusions of this report.
PAHs (Table C3): The RDLs were all less than RSLs for analytes reported as less
than the RDL, as applicable, for analytes reported as less than the RDL.
Laboratory Set L1606417 (Groundwater Samples):
RCRA 8 Metals (Table C4): The RDLs were all less than the MCLs and UGWQS
screening levels for analytes reported as less than the RDL, as applicable, for analytes
reported as less than the RDL.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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TPH and VOCs (Table C5): The RDLs were all less than the Utah ISLs, Utah Tier 1
screening levels, EPA VISLs, and EPA residential RSLs, as applicable, for analytes
reported as less than the RDL. The only exceptions to this were acrolein, acrylonitrile,
bromodichloromethane, carbon tetrachloride, chloroform, 1,2-dibromo-3-
chloropropane, 1,2,-dibromoethane, hexachloro-1,2-butadiene, naphthalene, and
vinyl chloride which exceeded at least one of these screening levels in at least one
sample. None of these groundwater samples had non-estimated detections of these
analytes or are considered contaminants of concern at the site. Hence, this sensitivity
issue for groundwater samples is not anticipated to affect the conclusions of this report.
PAHs (Table C6): The RDLs were all less than the MCLs and UGWQS screening
levels for analytes reported as less than the RDL, as applicable, for analytes reported
as less than the RDL.
Laboratory Set L1607510 (Soil Gas Samples):
VOCs (Table C7): The RDLs were all less than the EPA VISLs, as applicable, for
analytes reported as less than the RDL. The only exceptions to this were 1,3-butdiene,
1,2-dibromoethane, hexachloro-1,3-butadiene, and naphthalene. None of these
samples had detections of these analytes or are considered contaminants of concern
at the site. Hence, this sensitivity issue for soil gas samples is not anticipated to affect
the conclusions of this report.
The DQIs for Comparability were achieved. As such,Comparability was deemed acceptable.
6.0 DATA EVALUATION
Following is an overview of the identified contaminants in soil and groundwater during the course
of the current Phase II ESA.
6.1 Soil Sample Results
Based on the results of this investigation, each of the shallow soil samples exceeded the Industrial
RSL for arsenic. No other metals exceeded a regulatory screening level in the samples collected.
Additionally, four shallow soil samples and the duplicate exceeded the Residential RSL for
benzo(a)pyrene (Exhibit 4). These locations (SB-2, SB-3, SB-4, and SB-8) are located in the
northern portion of the site and north of the proposed new building. The duplicate sample SB-
108-12-13 slightly exceeded the UDEQ ISL for benzene (Exhibit 5). This location (SB-8) is
located in the northern portion of the site. No soil samples exceeded regulatory screening levels
for petroleum hydrocarbons.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
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6.2 Groundwater Sample Results
Two groundwater samples (SB-2 and SB-4) slightly exceeded the MCL for arsenic (Exhibit 6).
No PAHs, petroleum hydrocarbons, or VOCs exceeded a MCL, VISL, or any other regulatory
screening level.
The approximate groundwater flow direction was determined based on the temporary
piezometers constructed at the site. The approximate flow direction was found to be to the
northeast, although the piezometers were rather close to each other. Previous reports in the
vicinity of this site indicate a groundwater flow direction generally to the west. The flow direction
may be influenced by seasonal fluctuations and/or nearby building foundations or footers.
7.0 CONCLUSIONS AND RECOMMENDATIONS
Multiple soil samples exceeded the Residential RSL for one PAH, benzo(a)pyrene. The
exceedances were reported in shallow soil in several locations and are likely related to the fill
material encountered on the site. Groundwater samples did not report the presence of PAHs.
Removal of the fill material would likely remove impacted soils.
Low concentrations of multiple VOCs, including petroleum hydrocarbons, were reported in soils
across the site. One soil sample soil, a duplicate soil sample, reported a concentration of benzene
slightly above the UDEQ ISL. Although one concentration of benzene exceeded the ISL,
petroleum hydrocarbons do not appear to be widespread at concentrations that exceed a
screening level or present at concentrations that are leaching to groundwater.
Arsenic concentrations in soil exceeded the EPA RSL. Two groundwater samples reported an
exceedance of the MCL for dissolved arsenic but did not exceed the UGWQS. Slightly elevated
concentrations of arsenic in soils and slightly elevated dissolved arsenic in groundwater is
naturally occurring in the Salt Lake Valley and commonly encountered. This site should not be
considered a source of a release of arsenic to soils or groundwater.
Groundwater flow direction was determined to be to the northeast, which is slightly different from
previous studies conducted on this site. This suggests that the groundwater flow direction may be
rather variable and influenced by seasonal variations and/or structures.
Phase II Environmental Site Assessment
GIV Development ■ Salt Lake City, Utah
Terracon Project 61217496 Task 3.20 ■May 26, 2023
Responsive ■Resourceful ■Reliable 22
8.0 REFERENCES
Terracon Consultants, Inc. (Terracon)
2023 Sampling and Analyses Plan, Salt Lake County Brownfields Assessment, EPA Cooperative
Agreement No. 95811800, Hazardous Materials and Petroleum Grant for Salt Lake County, GIV
Development – Citizens West Property, Salt Lake City, Salt Lake County, Utah,March 6, 2023.
2022 Terracon, Community-Wide Quality Assurance Project Plan, Salt Lake Brownfields Coalition
Assessments, EPA Cooperative Agreement No. 96811800, Salt Lake County, Utah,February 8,
2022.
2022b Phase I Environmental Site Assessment, Salt Lake County Brownfields Assessment, EPA
Cooperative Agreement No. 95811800, Hazardous Materials and Petroleum Grant for Salt Lake
County, GIV Development – Citizens West Property, Salt Lake City, Salt Lake County, Utah,
September 29, 2022.
APPENDIX A
Exhibits
APPENDIX B
Soil Boring Logs
2.0
6.0
7.5
9.5
10.0
Sample SB-1-1.5-2 at 1.5-2'
Sample SB-1-7.5-8.5 at 7.5-8.5'
FILL - SILTY SAND WITH GRAVEL (SM), dark brown, moist, some gravel, organics from 0-1'.
FILL - POORLY GRADED SAND (SP), brown, moist, some gravel present.
POORLY GRADED SAND (SP), light brown, wet
LEAN CLAY WITH SILT (CL), light yellowish brown, wet
POORLY GRADED SAND (SP), light yellowish brown, wet
Boring Terminated at 10 Feet
0.0
0.0
0.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
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B-1
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-1
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
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Groundwater encountered 7.5 ft.
WATER LEVEL OBSERVATIONS
60
52
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(
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0.3
3.0
5.0
6.0
7.5
9.5
11.0
12.0
15.0
Sample SB-2-2-4.5 at 2-4.5'
Sample SB-2-12-14 at 12-14'
ASPHALT, Approximately 3 inches asphalt.
FILL - SILTY SAND WITH GRAVEL (SM), orange brown, moist, with fine gravel.
FILL - SILTY SAND WITH GRAVEL (SM), dark gray, moist, with fine gravel, trace coarse gravel/cobbles.
FILL - SILTY SAND (SM), dark brwon, moist, trace gravel.
FILL - SILTY SAND (SM), dark gray, moist, orange brown from 7-7.5'.
FILL - POORLY GRADED SAND WITH SILT (SP-SM), dark gray, moist, trace organics.
POORLY GRADED SAND (SP), light brown, moist, coarse sand.
SANDY SILT (ML), light gray, wet, soft.
SILTY SAND (SM), dark brown, wet, trace clay.
Boring Terminated at 15 Feet
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
1.4
3.2
4.6
4.0
0.1
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
C
O
N
_
D
A
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A
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E
M
P
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A
T
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.
G
D
T

4
/
2
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/
2
3
B-2
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-2
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
15
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 11ft.
WATER LEVEL OBSERVATIONS
23
63
70
RE
C
O
V
E
R
Y

(
%
)
0.2
1.0
4.0
6.5
8.0
9.0
9.5
10.0
Sample SB-3-1-2 at 1-2'
Sample SB-3-7.5-8.5 at 7.5-8.5'
CONCRETE, Approximately 2 inches concrete.
FILL - POORLY GRADED GRAVEL (GP), light gray, dry, sub-base.
FILL - POORLY GRADED SAND (SP), brown, moist, some silt, trace gravel.
FILL - SILTY SAND (SM), dark brown, moist
SILTY SAND (SM), brown, moist
POORLY GRADED SAND (SP), dark brown, wet
POORLY GRADED SAND WITH GRAVEL (SP), yellowish brown, wet
POORLY GRADED SAND WITH SILT (SP), dark brown, wet, trace clay.
Boring Terminated at 10 Feet
0.0
0.2
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
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S
.
G
P
J

T
E
R
R
A
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O
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_
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A
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M
P
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A
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D
T

4
/
2
1
/
2
3
B-3
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-3
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 8 ft.
WATER LEVEL OBSERVATIONS
28
65
RE
C
O
V
E
R
Y

(
%
)
0.2
8.0
8.5
10.0
Sample SB-4-1-1.5 at 1-1.5'
Sample SB-4-7.5-8.5 at 7.5-8.5'
ASPHALT, Approximately 2 inches asphalt.
FILL - SILTY SAND (SM), dark brown, moist, trace gravel. Light yellowish brown sand intervals from 1-2.5'.
POORLY GRADED GRAVEL (GP), brown, wet, some sand and silt.
LEAN CLAY WITH SILT (CL), light yellowish brown, wet, very soft.
Boring Terminated at 10 Feet
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
C
O
N
_
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A
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A
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E
M
P
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A
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.
G
D
T

4
/
2
1
/
2
3
B-4
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-4
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 8 ft.
WATER LEVEL OBSERVATIONS
43
50
RE
C
O
V
E
R
Y

(
%
)
1.0
2.0
6.0
6.3
7.0
8.0
10.0
Sample SB-5-1-2 at 1-2'
Sample SB-5-8-9 at 8-9'
ASPHALT, Approximately one foot asphalt.
FILL - POORLY GRADED GRAVEL (GP), light gray, dry, with orange sand.
FILL - POORLY GRADED GRAVEL WITH SILT AND SAND (SP), light gray, dry
WELL GRADED SAND WITH GRAVEL (SW), tan, moist
SILTY SAND (SM), brown, moist, trace fine gravel.
POORLY GRADED SAND (SP), brown, wet, fine gravel from 7.5-8.5'.
POORLY GRADED SAND WITH SILT (SP-SM), brown, wet, soft silt.
Boring Terminated at 10 Feet
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.4
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
C
O
N
_
D
A
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A
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E
M
P
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A
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E
.
G
D
T

4
/
2
1
/
2
3
B-5
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-5
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 7 ft.
WATER LEVEL OBSERVATIONS
32
43
RE
C
O
V
E
R
Y

(
%
)
0.5
3.0
5.0
7.0
8.0
10.0
Sample SB-6-3-4 at 3-4'
Sample SB-6-7-8 at 7-8'
ASPHALT, Approximately 6 inches asphalt.
FILL - SILTY SAND (SM), brown, moist, some fine organgish gravel.
FILL - POORLY GRADED SAND WITH SILT (SP-SM), dark brown, moist, soft silt, 2-inch seam of balck silt at 4.5 ft.
WELL GRADED SAND WITH GRAVEL (SM), brown, moist
SILTY SAND (SM), light brown, moist, trace fine gravel.
POORLY GRADED SAND (SP-SM), brown, moist to wet, trace clay. 2-Inch light brown sand seam at 9'.
Boring Terminated at 10 Feet
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
C
O
N
_
D
A
T
A
T
E
M
P
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A
T
E
.
G
D
T

4
/
2
1
/
2
3
B-6
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-6
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 8.5 ft.
WATER LEVEL OBSERVATIONS
63
55
RE
C
O
V
E
R
Y

(
%
)
0.8
2.5
4.5
9.0
9.3
11.0
12.5
15.0
Sample SB-7-2.5-3.5 at 2.5-3.5'
Sample SB-7-12-13 at 12-13'
CONCRETE, Approximately 9 inches concrete and base.
FILL - POORLY GRADED SAND WITH GRAVEL (SP), light orange brown, dry, fine gravel.
FILL - POORLY GRADED SAND (SP), dark brown, dry, trace silt and gravel fragments.
FILL - SILTY SAND (SM), dark brown, moist, minor layering.
POORLY GRADED SAND (SP), dark brown, moist, some silt.
SILTY SAND (SM), brown, moist
POORLY GRADED SAND WITH GRAVEL (SP), brown, wet, fine gravel, some silt.
SILTY SAND (SM), brown, wet, with soft clay, slight organic odor.
Boring Terminated at 15 Feet
0.0
0.0
0.0
0.0
0.0
0.1
0.0
0.0
0.0
0.1
0.4
2.1
5.3
4.6
1.2
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
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O
N
_
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A
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E
M
P
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A
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E
.
G
D
T

4
/
2
1
/
2
3
B-7
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-7
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
15
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 11 ft.
WATER LEVEL OBSERVATIONS
70
RE
C
O
V
E
R
Y

(
%
)
6.0
7.0
12.0
13.0
15.0
Sample SB-8-2-3 at 2-3'
Sample SB-8-12-13 at 12-13'
FILL - SILTY SAND (SM), dark brown, moist, with gravel, yellowish brown seams. 3-Inch tan fine gravel layer at 3.5'.
SILTY SAND (SM), dark brown, moist, trace clay.
SILTY SAND (SM), brown, moist to wet, trace clay. Trace gravel at 11 ft.
SILTY SAND (SM), black, wet
SILTY SAND (SM), grayish brown, wet
Boring Terminated at 15 Feet
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LOCATION
DEPTH
The stratification lines represent the approximate transition between differing soil types and/or rock
types; in-situ these transitions may be gradual or may occur at different depths than shown.
GR
A
P
H
I
C

L
O
G
See Exhibit 2
TH
I
S

B
O
R
I
N
G

L
O
G

I
S

N
O
T

V
A
L
I
D

I
F

S
E
P
A
R
A
T
E
D

F
R
O
M

O
R
I
G
I
N
A
L

R
E
P
O
R
T
.

E
N
V
I
R
O
N
M
E
N
T
A
L

S
M
A
R
T

L
O
G

B
O
R
I
N
G

L
O
G
S
.
G
P
J

T
E
R
R
A
C
O
N
_
D
A
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A
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E
M
P
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A
T
E
.
G
D
T

4
/
2
1
/
2
3
B-8
6949 S High Tech Dr Ste 100
Midvale, UT
509 West 300 North
Salt Lake City, Utah
SITE:
Page 1 of 1
Advancement Method:
Direct Push
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61217496
Drill Rig: DR009
Boring Started: 04-14-2023
BORING LOG NO. SB-8
Salt Lake Brownfields Coalition Assessment
Driller: DPS
Boring Completed: 04-14-2023
Exhibit:
See Appendices for description of laboratory
procedures and additional data (if any).
CLIENT:
See Appendices for description of field
procedures.
See Appendices for explanation of symbols and
abbreviations.
PROJECT: GIV Development - Citizens West Property
MATERIAL DESCRIPTION
OV
A
/
P
I
D
(p
p
m
)
DE
P
T
H

(
f
t
)
5
10
15
WA
T
E
R

L
E
V
E
L
OB
S
E
R
V
A
T
I
O
N
S
SA
M
P
L
E

T
Y
P
E
Groundwater encountered 9 ft.
WATER LEVEL OBSERVATIONS
50
37
80
RE
C
O
V
E
R
Y

(
%
)
APPENDIX C
Data Summary Tables
Table C1 - Metals in Soil
GIV Development - Citizens West - 509 West 300 North Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
ARSENIC 7440-38-2 6010B mg/kg 0.7 3 8.39 0.631 2.44 14.6 0.592 2.29 3.82 0.605 2.34
BARIUM 7440-39-3 6010B mg/kg 15,000 220,000 151 0.104 0.609 236 0.0974 0.572 117 0.0995 0.584
CADMIUM 7440-43-9 6010B mg/kg 7.1 111 0.727 0.0573 0.609 0.771 0.0539 0.572 0.373 J 0.055 0.584
CHROMIUM 7440-47-3 6010B mg/kg NE NE 17.9 0.162 1.22 28 0.152 1.14 16.5 0.155 1.17
LEAD 7439-92-1 6010B mg/kg 400 800 99.3 0.253 0.609 303 0.238 0.572 95.1 0.243 0.584
MERCURY 7439-97-6 7471A mg/kg 11 46 0.125 0.0219 0.049 0.222 0.0206 0.0457 0.499 0.021 0.0467
SELENIUM 7782-49-2 6010B mg/kg 390 5,800 1.58 J 0.93 2.44 <2.29 0.874 2.29 <2.34 0.892 2.34
SILVER 7440-22-4 6010B mg/kg 390 5,800 <1.22 0.155 1.22 0.19 J 0.145 1.14 0.249 J 0.148 1.17
Qualifiers (Q):
mg/kg:Milligrams per kilogram. <: Less than Reported Detection Limit (RDL).
Bold value exceeds Method Detection Limit (MDL). NE - Not Established
Color shaded value exceeds screening level.
SB-2-2.5-4
EPA RSL:Environmental Protection Agency Regional Screening Levels for soil at
residential (Res.) and industrial (Ind.) properties (November 2022; TR=1E-06;
THQ=1.0).
L1606384-03
04/14/2023 04/14/2023
L1606384-05
SB-3-1-2
Lab Sample ID
Client Sample ID
Date Collected
L1606384-01
04/14/2023
SB-1-1.5-2
J - The identification of the analyte is acceptable; the reported value is an estimate.
Page 1 of 3
Table C1 - Metals in Soil
GIV Development - Citizens West - 509 West 300 North Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial
ARSENIC 7440-38-2 6010B mg/kg 0.7 3
BARIUM 7440-39-3 6010B mg/kg 15,000 220,000
CADMIUM 7440-43-9 6010B mg/kg 7.1 111
CHROMIUM 7440-47-3 6010B mg/kg NE NE
LEAD 7439-92-1 6010B mg/kg 400 800
MERCURY 7439-97-6 7471A mg/kg 11 46
SELENIUM 7782-49-2 6010B mg/kg 390 5,800
SILVER 7440-22-4 6010B mg/kg 390 5,800
Qualifiers (Q):
mg/kg:Milligrams per kilogram. <: Less than Reported Detection Limit (RDL).
Bold value exceeds Method Detection Limit (MDL). NE - Not Established
Color shaded value exceeds screening level.
EPA RSL:Environmental Protection Agency Regional Screening Levels for soil at
residential (Res.) and industrial (Ind.) properties (November 2022; TR=1E-06;
THQ=1.0).
Lab Sample ID
Client Sample ID
Date Collected
J - The identification of the analyte is acceptable; the reported value is an estimate.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
7.55 0.593 2.29 5.04 0.534 2.06 3.75 0.674 2.6
142 0.0976 0.573 18 0.0879 0.516 70.9 0.111 0.651
0.699 0.0539 0.573 <0.516 0.0486 0.516 0.955 0.0613 0.651
10.4 0.152 1.15 6.55 0.137 1.03 12.6 0.173 1.3
319 0.238 0.573 18.5 0.215 0.516 29.9 0.271 0.651
0.505 0.0206 0.0458 0.0192 J 0.0186 0.041 <0.0521 0.0234 0.052
1.06 J 0.875 2.29 1.13 J 0.788 2.06 1.12 J 0.995 2.6
0.394 J 0.145 1.15 <1.03 0.131 1.03 <1.30 0.165 1.3
L1606384-09 L1606384-11
04/14/2023
L1606384-07
SB-4-1-1.5 SB-6-3-4SB-5-1-2
04/14/2023 04/14/2023
Page 2 of 3
Table C1 - Metals in Soil
GIV Development - Citizens West - 509 West 300 North Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial
ARSENIC 7440-38-2 6010B mg/kg 0.7 3
BARIUM 7440-39-3 6010B mg/kg 15,000 220,000
CADMIUM 7440-43-9 6010B mg/kg 7.1 111
CHROMIUM 7440-47-3 6010B mg/kg NE NE
LEAD 7439-92-1 6010B mg/kg 400 800
MERCURY 7439-97-6 7471A mg/kg 11 46
SELENIUM 7782-49-2 6010B mg/kg 390 5,800
SILVER 7440-22-4 6010B mg/kg 390 5,800
Qualifiers (Q):
mg/kg:Milligrams per kilogram. <: Less than Reported Detection Limit (RDL).
Bold value exceeds Method Detection Limit (MDL). NE - Not Established
Color shaded value exceeds screening level.
EPA RSL:Environmental Protection Agency Regional Screening Levels for soil at
residential (Res.) and industrial (Ind.) properties (November 2022; TR=1E-06;
THQ=1.0).
Lab Sample ID
Client Sample ID
Date Collected
J - The identification of the analyte is acceptable; the reported value is an estimate.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
6.54 0.574 2.22 6.49 0.601 2.32 6.16 0.609 2.35
83 0.0945 0.554 93 0.0988 0.58 95.4 0.1 0.59
0.652 0.0522 0.554 0.767 0.0546 0.58 0.691 0.0554 0.59
7.41 0.147 1.11 10.8 0.154 1.16 11 0.156 1.18
82.3 0.231 0.554 195 0.241 0.58 108 0.245 0.59
0.26 0.02 0.044 0.0421 J 0.0209 0.046 0.0322 J 0.0212 0.05
<2.22 0.847 2.22 <2.32 0.886 2.32 <2.35 0.898 2.35
<1.11 0.141 1.11 <1.16 0.147 1.16 <1.18 0.149 1.18
L1606384-17
SB-108-2-3
04/14/2023
SB-8-2-3
04/14/2023
L1606384-15
04/14/2023
L1606384-13
SB-7-2.5-3.5
Page 3 of 3
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1 Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
TPH-GRO 8006-61-9 8260B mg/kg NE NE 150 1500 0.454 J 0.238 0.65 1.24 0.264 0.721 <0.638 0.234 0.638
TPH-DRO 68334-30-5 8015 mg/kg NE NE 500 5000 1.43 J 0.999 5.2 1.54 J 1.11 5.77 1.01 J 0.982 5.11
ACETONE 67-64-1 8260B mg/kg 61000 670000 NE NE <0.0650 0.0269 0.065 <0.0721 J5 0.0299 0.0721 <0.0638 0.0264 0.0638
ACRYLONITRILE 107-13-1 8260B mg/kg 0.25 1.1 NE NE <0.0130 0.00263 0.013 <0.0144 0.00291 0.0144 <0.0128 0.00258 0.0128
BENZENE 71-43-2 8260B mg/kg 1.2 5.1 0.2 0.9 0.0128 0.00049 0.0013 0.153 V 0.00054 0.0014 0.00124 J 0.00048 0.0013
BROMOBENZENE 108-86-1 8260B mg/kg 290 1800 NE NE <0.00130 0.00036 0.0013 <0.00144 0.0004 0.0014 <0.00128 0.00035 0.0013
BROMODICHLOROMETHANE 75-27-4 8260B mg/kg 0.29 1.3 NE NE <0.00130 0.00094 0.0013 <0.00144 0.00105 0.0014 <0.00128 0.00093 0.0013
BROMOFORM 75-25-2 8260B mg/kg 19 86 NE NE <0.00130 0.00055 0.0013 <0.00144 J3 0.00061 0.0014 <0.00128 0.00054 0.0013
BROMOMETHANE 74-83-9 8260B mg/kg 6.8 30 NE NE <0.00650 0.00152 0.0065 <0.00721 0.00169 0.0072 <0.00638 0.00149 0.0064
N-BUTYLBENZENE 104-51-8 8260B mg/kg 3900 58000 NE NE <0.00130 0.00034 0.0013 0.000516 J 0.00037 0.0014 <0.00128 0.00033 0.0013
SEC-BUTYLBENZENE 135-98-8 8260B mg/kg 7800 120000 NE NE <0.00130 0.00026 0.0013 0.000506 J 0.00029 0.0014 <0.00128 0.00026 0.0013
TERT-BUTYLBENZENE 98-06-6 8260B mg/kg 7800 120000 NE NE <0.00130 0.00027 0.0013 <0.00144 0.0003 0.0014 <0.00128 0.00026 0.0013
CARBON TETRACHLORIDE 56-23-5 8260B mg/kg 0.65 2.9 NE NE <0.00130 0.00032 0.0013 <0.00144 0.00036 0.0014 <0.00128 0.00032 0.0013
CHLOROBENZENE 108-90-7 8260B mg/kg 280 1300 NE NE <0.00130 0.00025 0.0013 <0.00144 0.00028 0.0014 <0.00128 0.00025 0.0013
CHLORODIBROMOMETHANE 124-48-1 8260B mg/kg 8.3 39 NE NE <0.00130 0.00029 0.0013 <0.00144 J3 0.00032 0.0014 <0.00128 0.00029 0.0013
CHLOROETHANE 75-00-3 8260B mg/kg 14000 57000 NE NE <0.00650 0.0013 0.0065 <0.00721 0.00144 0.0072 <0.00638 0.00128 0.0064
CHLOROFORM 67-66-3 8260B mg/kg 0.32 1.4 NE NE <0.00650 0.00134 0.0065 <0.00721 0.00149 0.0072 <0.00638 0.00131 0.0064
CHLOROMETHANE 74-87-3 8260B mg/kg 110 460 NE NE <0.00325 0.00085 0.0033 <0.00361 0.00094 0.0036 <0.00319 0.00083 0.0032
2-CHLOROTOLUENE 95-49-8 8260B mg/kg 1600 23000 NE NE <0.00130 0.00029 0.0013 <0.00144 0.00033 0.0014 <0.00128 0.00029 0.0013
4-CHLOROTOLUENE 106-43-4 8260B mg/kg 1600 23000 NE NE <0.00130 0.0009 0.0013 <0.00144 0.001 0.0014 <0.00128 0.00088 0.0013
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/kg 0.0053 0.064 NE NE <0.00650 0.00247 0.0065 <0.00721 0.00274 0.0072 <0.00638 0.00243 0.0064
1,2-DIBROMOETHANE 106-93-4 8260B mg/kg 0.036 0.16 NE NE <0.00130 0.00033 0.0013 <0.00144 0.00036 0.0014 <0.00128 0.00032 0.0013
DIBROMOMETHANE 74-95-3 8260B mg/kg 24 99 NE NE <0.00130 0.00046 0.0013 <0.00144 0.00051 0.0014 <0.00128 0.00045 0.0013
1,2-DICHLOROBENZENE 95-50-1 8260B mg/kg 1800 9300 NE NE <0.00130 0.00055 0.0013 <0.00144 0.00061 0.0014 <0.00128 0.00054 0.0013
1,3-DICHLOROBENZENE 541-73-1 8260B mg/kg NE NE NE NE <0.00130 0.00078 0.0013 <0.00144 0.00087 0.0014 <0.00128 0.00077 0.0013
1,4-DICHLOROBENZENE 106-46-7 8260B mg/kg 2.6 11 NE NE <0.00130 0.00108 0.0013 <0.00144 0.0012 0.0014 <0.00128 0.00106 0.0013
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/kg 87 370 NE NE <0.00650 0.00037 0.0065 <0.00721 0.00041 0.0072 <0.00638 0.00037 0.0064
1,1-DICHLOROETHANE 75-34-3 8260B mg/kg 3.6 16 NE NE <0.00130 0.00035 0.0013 <0.00144 0.00039 0.0014 <0.00128 0.00034 0.0013
1,2-DICHLOROETHANE 107-06-2 8260B mg/kg 0.46 2 NE NE <0.00130 0.00059 0.0013 <0.00144 0.00065 0.0014 <0.00128 0.00057 0.0013
1,1-DICHLOROETHENE 75-35-4 8260B mg/kg 230 1000 NE NE <0.00130 0.00046 0.0013 <0.00144 0.00051 0.0014 <0.00128 0.00045 0.0013
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/kg 160 2300 NE NE <0.00130 0.00062 0.0013 <0.00144 0.00069 0.0014 <0.00128 0.00061 0.0013
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/kg 70 300 NE NE <0.00130 0.00065 0.0013 <0.00144 0.00072 0.0014 <0.00128 0.00064 0.0013
1,2-DICHLOROPROPANE 78-87-5 8260B mg/kg 2.5 11 NE NE <0.00130 0.00021 0.0013 <0.00144 0.00024 0.0014 <0.00128 0.00021 0.0013
1,1-DICHLOROPROPENE 563-58-6 8260B mg/kg NE NE NE NE <0.00130 0.00049 0.0013 <0.00144 0.00054 0.0014 <0.00128 0.00048 0.0013
1,3-DICHLOROPROPANE 142-28-9 8260B mg/kg 1600 23000 NE NE <0.00130 0.00029 0.0013 <0.00144 0.00033 0.0014 <0.00128 0.00029 0.0013
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/kg NE NE NE NE <0.00130 0.00055 0.0013 <0.00144J3 J6 0.00061 0.0014 <0.00128 0.00054 0.0013
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/kg NE NE NE NE <0.00130 0.00088 0.0013 <0.00144J3 J6 0.00097 0.0014 <0.00128 0.00086 0.0013
2,2-DICHLOROPROPANE 594-20-7 8260B mg/kg NE NE NE NE <0.00130 0.00049 0.0013 <0.00144 0.00054 0.0014 <0.00128 0.00048 0.0013
DI-ISOPROPYL ETHER 108-20-3 8260B mg/kg 2200 9400 NE NE <0.00130 0.00029 0.0013 <0.00144 0.00032 0.0014 <0.00128 0.00028 0.0013
ETHYLBENZENE 100-41-4 8260B mg/kg 5.8 25 5 23 0.0034 0.00039 0.0013 0.032 0.00043 0.0014 <0.00128 0.00038 0.0013
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/kg 1.2 5.3 NE NE <0.00130 0.00044 0.0013 <0.00144 0.00049 0.0014 <0.00128 0.00044 0.0013
ISOPROPYLBENZENE 98-82-8 8260B mg/kg 1900 9900 NE NE 0.000955 J 0.00055 0.0013 0.00293 0.00061 0.0014 <0.00128 0.00054 0.0013
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/kg NE NE NE NE <0.00130 0.00027 0.0013 0.000498 J 0.00029 0.0014 <0.00128 0.00026 0.0013
2-BUTANONE (MEK)78-93-3 8260B mg/kg 27000 190000 NE NE 0.00998 J 0.00608 0.013 0.0351 0.00675 0.0144 <0.0128 0.00597 0.0128
METHYLENE CHLORIDE 75-09-2 8260B mg/kg 57 1000 NE NE <0.00650 0.0013 0.0065 <0.00721 0.00144 0.0072 <0.00638 0.00128 0.0064
L1606384-06
04/14/2023
SB-3-7.5-8.5Client Sample ID SB-1-7.5-8.5 SB-2-12-14
Lab Sample ID L1606384-02 L1606384-04
Date Collected 04/14/2023 04/14/2023
Page 1 of 6
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1 Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
L1606384-06
04/14/2023
SB-3-7.5-8.5Client Sample ID SB-1-7.5-8.5 SB-2-12-14
Lab Sample ID L1606384-02 L1606384-04
Date Collected 04/14/2023 04/14/2023
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/kg 33000 140000 NE NE <0.0130 0.00123 0.013 <0.0144 0.00137 0.0144 <0.0128 0.00121 0.0128
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/kg 47 210 0.3 0.3 <0.00130 0.00046 0.0013 <0.00144 0.00051 0.0014 <0.00128 0.00045 0.0013
NAPHTHALENE 91-20-3 8260B mg/kg 2 8.6 51 51 <0.00650 0.00647 0.0065 0.0224 0.00718 0.0072 <0.00638 0.00636 0.0064
N-PROPYLBENZENE 103-65-1 8260B mg/kg 3800 24000 NE NE 0.000504 J 0.00027 0.0013 0.0039 0.0003 0.0014 <0.00128 0.00026 0.0013
STYRENE 100-42-5 8260B mg/kg 6000 35000 NE NE <0.00130 0.00029 0.0013 <0.00144J3 J6 0.00032 0.0014 <0.00128 0.00029 0.0013
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/kg 2 8.8 NE NE <0.00130 0.00039 0.0013 <0.00144 0.00043 0.0014 <0.00128 0.00038 0.0013
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/kg 0.6 2.7 NE NE <0.00130 0.0003 0.0013 <0.00144 0.00033 0.0014 <0.00128 0.0003 0.0013
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/kg 6700 28000 NE NE <0.00130 0.00055 0.0013 <0.00144 0.00062 0.0014 <0.00128 0.00054 0.0013
TETRACHLOROETHENE 127-18-4 8260B mg/kg 24 100 NE NE <0.00130 0.00042 0.0013 <0.00144 0.00047 0.0014 <0.00128 0.00042 0.0013
TOLUENE 108-88-3 8260B mg/kg 4900 47000 9 25 0.0182 0.0016 0.0065 0.203 V 0.00177 0.0072 <0.00638 0.00157 0.0064
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/kg 63 930 NE NE <0.00130 0.0004 0.0013 <0.00144 0.00044 0.0014 <0.00128 0.00039 0.0013
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/kg 24 110 NE NE <0.00130 0.0005 0.0013 <0.00144 0.00056 0.0014 <0.00128 0.0005 0.0013
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/kg 8100 36000 NE NE <0.00130 0.00048 0.0013 <0.00144 0.00053 0.0014 <0.00128 0.00047 0.0013
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/kg 1.1 5 NE NE <0.00130 0.00055 0.0013 <0.00144 0.00061 0.0014 <0.00128 0.00054 0.0013
TRICHLOROETHENE 79-01-6 8260B mg/kg 0.94 6 NE NE <0.00130 0.00026 0.0013 <0.00144 0.00029 0.0014 <0.00128 0.00026 0.0013
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/kg 23000 350000 NE NE <0.00650 0.00046 0.0065 <0.00721 0.00051 0.0072 <0.00638 0.00045 0.0064
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/kg 0.0051 0.11 NE NE <0.00325 0.00032 0.0033 <0.00361 0.00035 0.0036 <0.00319 0.00031 0.0032
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/kg 300 1800 NE NE 0.00138 0.00027 0.0013 0.0118 0.0003 0.0014 <0.00128 0.00027 0.0013
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/kg 340 2000 NE NE 0.000586 J 0.00037 0.0013 0.0044 0.00041 0.0014 <0.00128 0.00037 0.0013
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/kg 270 1500 NE NE 0.000465 J 0.00035 0.0013 0.00415 0.00038 -1081 <0.00128 0.00034 0.0013
VINYL CHLORIDE 75-01-4 8260B mg/kg 0.059 1.7 NE NE <0.00130 0.00029 0.0013 <0.00144 0.00033 0.0014 <0.00128 0.00029 0.0013
XYLENES, TOTAL 1330-20-7 8260B mg/kg 580 2500 142 142 0.00799 0.00065 0.0039 0.0772 0.00072 0.0043 <0.00383 0.00064 0.0038
Qualifiers (Q):
NE:Not Established.<:Less than Reported Detection Limit (RDL).
mg/kg:Milligrams per kilogram.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential (Res.) and industrial (Ind.)
properties (November 2022; TR=1E-06; THQ=1.0).
Utah's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for petroleum releases at leaking
underground storage tank sites
Bold value exceeds Method Detection Limit (MDL).
J: The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for
precision.J5: The sample matrix interfered with the ability to make any accurate
determination; spike value is high.J6: The sample matrix interfered with the ability to
make any accurate determination; spike value is low. V: The sample concentration is too
high to evaluate accurate spike recoveries.
Page 2 of 6
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1
TPH-GRO 8006-61-9 8260B mg/kg NE NE 150 1500
TPH-DRO 68334-30-5 8015 mg/kg NE NE 500 5000
ACETONE 67-64-1 8260B mg/kg 61000 670000 NE NE
ACRYLONITRILE 107-13-1 8260B mg/kg 0.25 1.1 NE NE
BENZENE 71-43-2 8260B mg/kg 1.2 5.1 0.2 0.9
BROMOBENZENE 108-86-1 8260B mg/kg 290 1800 NE NE
BROMODICHLOROMETHANE 75-27-4 8260B mg/kg 0.29 1.3 NE NE
BROMOFORM 75-25-2 8260B mg/kg 19 86 NE NE
BROMOMETHANE 74-83-9 8260B mg/kg 6.8 30 NE NE
N-BUTYLBENZENE 104-51-8 8260B mg/kg 3900 58000 NE NE
SEC-BUTYLBENZENE 135-98-8 8260B mg/kg 7800 120000 NE NE
TERT-BUTYLBENZENE 98-06-6 8260B mg/kg 7800 120000 NE NE
CARBON TETRACHLORIDE 56-23-5 8260B mg/kg 0.65 2.9 NE NE
CHLOROBENZENE 108-90-7 8260B mg/kg 280 1300 NE NE
CHLORODIBROMOMETHANE 124-48-1 8260B mg/kg 8.3 39 NE NE
CHLOROETHANE 75-00-3 8260B mg/kg 14000 57000 NE NE
CHLOROFORM 67-66-3 8260B mg/kg 0.32 1.4 NE NE
CHLOROMETHANE 74-87-3 8260B mg/kg 110 460 NE NE
2-CHLOROTOLUENE 95-49-8 8260B mg/kg 1600 23000 NE NE
4-CHLOROTOLUENE 106-43-4 8260B mg/kg 1600 23000 NE NE
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/kg 0.0053 0.064 NE NE
1,2-DIBROMOETHANE 106-93-4 8260B mg/kg 0.036 0.16 NE NE
DIBROMOMETHANE 74-95-3 8260B mg/kg 24 99 NE NE
1,2-DICHLOROBENZENE 95-50-1 8260B mg/kg 1800 9300 NE NE
1,3-DICHLOROBENZENE 541-73-1 8260B mg/kg NE NE NE NE
1,4-DICHLOROBENZENE 106-46-7 8260B mg/kg 2.6 11 NE NE
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/kg 87 370 NE NE
1,1-DICHLOROETHANE 75-34-3 8260B mg/kg 3.6 16 NE NE
1,2-DICHLOROETHANE 107-06-2 8260B mg/kg 0.46 2 NE NE
1,1-DICHLOROETHENE 75-35-4 8260B mg/kg 230 1000 NE NE
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/kg 160 2300 NE NE
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/kg 70 300 NE NE
1,2-DICHLOROPROPANE 78-87-5 8260B mg/kg 2.5 11 NE NE
1,1-DICHLOROPROPENE 563-58-6 8260B mg/kg NE NE NE NE
1,3-DICHLOROPROPANE 142-28-9 8260B mg/kg 1600 23000 NE NE
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/kg NE NE NE NE
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/kg NE NE NE NE
2,2-DICHLOROPROPANE 594-20-7 8260B mg/kg NE NE NE NE
DI-ISOPROPYL ETHER 108-20-3 8260B mg/kg 2200 9400 NE NE
ETHYLBENZENE 100-41-4 8260B mg/kg 5.8 25 5 23
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/kg 1.2 5.3 NE NE
ISOPROPYLBENZENE 98-82-8 8260B mg/kg 1900 9900 NE NE
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/kg NE NE NE NE
2-BUTANONE (MEK)78-93-3 8260B mg/kg 27000 190000 NE NE
METHYLENE CHLORIDE 75-09-2 8260B mg/kg 57 1000 NE NE
Client Sample ID
Lab Sample ID
Date Collected
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
0.415 J 0.232 0.634 0.407 J 0.233 0.636 0.37 J 0.215 0.589
2.17 J 0.976 5.07 1.17 J 0.978 5.09 2.34 J 0.905 4.71
0.0409 J 0.0263 0.0634 0.0484 J 0.0263 0.0636 0.025 J 0.0244 0.0589
<0.0127 0.00256 0.0127 <0.0127 0.00257 0.0127 <0.0118 0.00238 0.0118
0.00754 0.00048 0.0013 0.00426 0.000477 0.00127 0.00222 0.000441 0.00118
<0.00127 0.00035 0.0013 <0.00127 0.00035 0.00127 <0.00118 0.000324 0.00118
<0.00127 0.00092 0.0013 <0.00127 0.000922 0.00127 <0.00118 0.000853 0.00118
<0.00127 0.00054 0.0013 <0.00127 0.000539 0.00127 <0.00118 0.000499 0.00118
<0.00634 0.00148 0.0063 <0.00636 0.00149 0.00636 <0.00589 0.00138 0.00589
<0.00127 0.00033 0.0013 <0.00127 0.000328 0.00127 <0.00118 0.000304 0.00118
<0.00127 0.00026 0.0013 <0.00127 0.000256 0.00127 <0.00118 0.000237 0.00118
<0.00127 0.00026 0.0013 <0.00127 0.000262 0.00127 <0.00118 0.000242 0.00118
<0.00127 0.00032 0.0013 <0.00127 0.000315 0.00127 <0.00118 0.000292 0.00118
<0.00127 0.00024 0.0013 <0.00127 0.000244 0.00127 <0.00118 0.000226 0.00118
<0.00127 0.00028 0.0013 <0.00127 0.000285 0.00127 <0.00118 0.000264 0.00118
<0.00634 0.00127 0.0063 <0.00636 0.00127 0.00636 <0.00589 0.00118 0.00589
<0.00634 0.00131 0.0063 <0.00636 0.00131 0.00636 <0.00589 0.00121 0.00589
<0.00317 0.00083 0.0032 <0.00318 0.000826 0.00318 <0.00294 0.000765 0.00294
<0.00127 0.00029 0.0013 <0.00127 0.000286 0.00127 <0.00118 0.000265 0.00118
<0.00127 0.00088 0.0013 <0.00127 0.000878 0.00127 <0.00118 0.000813 0.00118
<0.00634 0.00241 0.0063 <0.00636 0.00242 0.00636 <0.00589 0.00224 0.00589
<0.00127 0.00032 0.0013 <0.00127 0.000318 0.00127 <0.00118 0.000294 0.00118
<0.00127 0.00044 0.0013 <0.00127 0.000445 0.00127 <0.00118 0.000412 0.00118
<0.00127 0.00054 0.0013 <0.00127 0.00054 0.00127 <0.00118 0.0005 0.00118
<0.00127 0.00076 0.0013 <0.00127 0.000763 0.00127 <0.00118 0.000706 0.00118
<0.00127 0.00105 0.0013 <0.00127 0.00106 0.00127 <0.00118 0.000977 0.00118
<0.00634 0.00036 0.0063 <0.00636 0.000365 0.00636 <0.00589 0.000338 0.00589
<0.00127 0.00034 0.0013 <0.00127 0.000341 0.00127 <0.00118 0.000315 0.00118
<0.00127 0.00057 0.0013 <0.00127 0.000572 0.00127 <0.00118 0.00053 0.00118
<0.00127 0.00045 0.0013 <0.00127 0.000451 0.00127 <0.00118 0.000418 0.00118
<0.00127 0.0006 0.0013 <0.00127 0.000604 0.00127 <0.00118 0.000559 0.00118
<0.00127 0.00063 0.0013 <0.00127 0.000636 0.00127 <0.00118 0.000589 0.00118
<0.00127 0.00021 0.0013 <0.00127 0.000208 0.00127 <0.00118 0.000193 0.00118
<0.00127 0.00048 0.0013 <0.00127 0.000477 0.00127 <0.00118 0.000441 0.00118
<0.00127 0.00029 0.0013 <0.00127 0.000286 0.00127 <0.00118 0.000265 0.00118
<0.00127 0.00054 0.0013 <0.00127 0.00054 0.00127 <0.00118 0.0005 0.00118
<0.00127 0.00086 0.0013 <0.00127 0.000858 0.00127 <0.00118 0.000795 0.00118
<0.00127 0.00048 0.0013 <0.00127 0.000477 0.00127 <0.00118 0.000441 0.00118
<0.00127 0.00028 0.0013 <0.00127 0.000281 0.00127 <0.00118 0.00026 0.00118
0.00154 0.00038 0.0013 0.00095 J 0.000381 0.00127 <0.00118 0.000353 0.00118
<0.00127 0.00043 0.0013 <0.00127 0.000435 0.00127 <0.00118 0.000403 0.00118
0.00073 J 0.00054 0.0013 0.000731 J 0.00054 0.00127 <0.00118 0.0005 0.00118
<0.00127 0.00026 0.0013 <0.00127 0.000259 0.00127 <0.00118 0.00024 0.00118
0.0104 J 0.00594 0.0127 0.0102 J 0.00595 0.0127 0.00638 J 0.00551 0.0118
<0.00634 0.00127 0.0063 <0.00636 0.00127 0.00636 <0.00589 0.00118 0.00589
L1606384-08
SB-4-7.5-8
04/14/2023
L1606384-10 L1606384-12
04/14/2023 04/14/2023
SB-5-8-9 SB-6-7-8
Page 3 of 6
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1
TPH-GRO 8006-61-9 8260B mg/kg NE NE 150 1500
Client Sample ID
Lab Sample ID
Date Collected
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/kg 33000 140000 NE NE
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/kg 47 210 0.3 0.3
NAPHTHALENE 91-20-3 8260B mg/kg 2 8.6 51 51
N-PROPYLBENZENE 103-65-1 8260B mg/kg 3800 24000 NE NE
STYRENE 100-42-5 8260B mg/kg 6000 35000 NE NE
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/kg 2 8.8 NE NE
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/kg 0.6 2.7 NE NE
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/kg 6700 28000 NE NE
TETRACHLOROETHENE 127-18-4 8260B mg/kg 24 100 NE NE
TOLUENE 108-88-3 8260B mg/kg 4900 47000 9 25
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/kg 63 930 NE NE
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/kg 24 110 NE NE
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/kg 8100 36000 NE NE
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/kg 1.1 5 NE NE
TRICHLOROETHENE 79-01-6 8260B mg/kg 0.94 6 NE NE
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/kg 23000 350000 NE NE
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/kg 0.0051 0.11 NE NE
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/kg 300 1800 NE NE
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/kg 340 2000 NE NE
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/kg 270 1500 NE NE
VINYL CHLORIDE 75-01-4 8260B mg/kg 0.059 1.7 NE NE
XYLENES, TOTAL 1330-20-7 8260B mg/kg 580 2500 142 142
Qualifiers (Q):
NE:Not Established.<:Less than Reported Detection Limit (RDL).
mg/kg:Milligrams per kilogram.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential (Res.) and industrial (Ind.)
properties (November 2022; TR=1E-06; THQ=1.0).
Utah's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for petroleum releases at leaking
underground storage tank sites
Bold value exceeds Method Detection Limit (MDL).
J: The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for
precision.J5: The sample matrix interfered with the ability to make any accurate
determination; spike value is high.J6: The sample matrix interfered with the ability to
make any accurate determination; spike value is low. V: The sample concentration is too
high to evaluate accurate spike recoveries.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
L1606384-08
SB-4-7.5-8
04/14/2023
L1606384-10 L1606384-12
04/14/2023 04/14/2023
SB-5-8-9 SB-6-7-8
<0.0127 0.00121 0.0127 <0.0127 0.00121 0.0127 <0.0118 0.00112 0.0118
<0.00127 0.00044 0.0013 <0.00127 0.000445 0.00127 <0.00118 0.000412 0.00118
<0.00634 0.00632 0.0063 <0.00636 0.00633 0.00636 <0.00589 0.00586 0.00589
<0.00127 0.00026 0.0013 <0.00127 0.000262 0.00127 <0.00118 0.000242 0.00118
<0.00127 0.00028 0.0013 <0.00127 0.000283 0.00127 <0.00118 0.000262 0.00118
<0.00127 0.00038 0.0013 <0.00127 0.000376 0.00127 <0.00118 0.000348 0.00118
<0.00127 0.00029 0.0013 <0.00127 0.000294 0.00127 <0.00118 0.000272 0.00118
<0.00127 0.00054 0.0013 <0.00127 0.000542 0.00127 <0.00118 0.000501 0.00118
<0.00127 0.00041 0.0013 <0.00127 0.000413 0.00127 <0.00118 0.000383 0.00118
0.00825 0.00156 0.0063 0.00507 J 0.00156 0.00636 0.00257 J 0.00145 0.00589
<0.00127 0.00039 0.0013 <0.00127 0.000389 0.00127 <0.00118 0.00036 0.00118
<0.00127 0.00049 0.0013 <0.00127 0.000493 0.00127 <0.00118 0.000457 0.00118
<0.00127 0.00047 0.0013 <0.00127 0.00047 0.00127 <0.00118 0.000436 0.00118
<0.00127 0.00054 0.0013 <0.00127 0.00054 0.00127 <0.00118 0.0005 0.00118
<0.00127 0.00025 0.0013 <0.00127 0.000254 0.00127 <0.00118 0.000235 0.00118
<0.00634 0.00045 0.0063 <0.00636 0.000453 0.00636 <0.00589 0.000419 0.00589
<0.00317 0.00031 0.0032 <0.00318 0.00031 0.00318 <0.00294 0.000287 0.00294
0.00051 J 0.00027 0.0013 0.000411 J 0.000268 0.00127 <0.00118 0.000248 0.00118
<0.00127 0.00036 0.0013 <0.00127 0.000365 0.00127 <0.00118 0.000338 0.00118
<0.00127 0.00034 0.0013 <0.00127 0.000338 0.00127 <0.00118 0.000313 0.00118
<0.00127 0.00029 0.0013 <0.00127 0.000287 0.00127 <0.00118 0.000266 0.00118
0.00302 J 0.00063 0.0038 0.00202 J 0.000636 0.00381 0.000791 J 0.000589 0.00353
Page 4 of 6
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1
TPH-GRO 8006-61-9 8260B mg/kg NE NE 150 1500
TPH-DRO 68334-30-5 8015 mg/kg NE NE 500 5000
ACETONE 67-64-1 8260B mg/kg 61000 670000 NE NE
ACRYLONITRILE 107-13-1 8260B mg/kg 0.25 1.1 NE NE
BENZENE 71-43-2 8260B mg/kg 1.2 5.1 0.2 0.9
BROMOBENZENE 108-86-1 8260B mg/kg 290 1800 NE NE
BROMODICHLOROMETHANE 75-27-4 8260B mg/kg 0.29 1.3 NE NE
BROMOFORM 75-25-2 8260B mg/kg 19 86 NE NE
BROMOMETHANE 74-83-9 8260B mg/kg 6.8 30 NE NE
N-BUTYLBENZENE 104-51-8 8260B mg/kg 3900 58000 NE NE
SEC-BUTYLBENZENE 135-98-8 8260B mg/kg 7800 120000 NE NE
TERT-BUTYLBENZENE 98-06-6 8260B mg/kg 7800 120000 NE NE
CARBON TETRACHLORIDE 56-23-5 8260B mg/kg 0.65 2.9 NE NE
CHLOROBENZENE 108-90-7 8260B mg/kg 280 1300 NE NE
CHLORODIBROMOMETHANE 124-48-1 8260B mg/kg 8.3 39 NE NE
CHLOROETHANE 75-00-3 8260B mg/kg 14000 57000 NE NE
CHLOROFORM 67-66-3 8260B mg/kg 0.32 1.4 NE NE
CHLOROMETHANE 74-87-3 8260B mg/kg 110 460 NE NE
2-CHLOROTOLUENE 95-49-8 8260B mg/kg 1600 23000 NE NE
4-CHLOROTOLUENE 106-43-4 8260B mg/kg 1600 23000 NE NE
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/kg 0.0053 0.064 NE NE
1,2-DIBROMOETHANE 106-93-4 8260B mg/kg 0.036 0.16 NE NE
DIBROMOMETHANE 74-95-3 8260B mg/kg 24 99 NE NE
1,2-DICHLOROBENZENE 95-50-1 8260B mg/kg 1800 9300 NE NE
1,3-DICHLOROBENZENE 541-73-1 8260B mg/kg NE NE NE NE
1,4-DICHLOROBENZENE 106-46-7 8260B mg/kg 2.6 11 NE NE
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/kg 87 370 NE NE
1,1-DICHLOROETHANE 75-34-3 8260B mg/kg 3.6 16 NE NE
1,2-DICHLOROETHANE 107-06-2 8260B mg/kg 0.46 2 NE NE
1,1-DICHLOROETHENE 75-35-4 8260B mg/kg 230 1000 NE NE
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/kg 160 2300 NE NE
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/kg 70 300 NE NE
1,2-DICHLOROPROPANE 78-87-5 8260B mg/kg 2.5 11 NE NE
1,1-DICHLOROPROPENE 563-58-6 8260B mg/kg NE NE NE NE
1,3-DICHLOROPROPANE 142-28-9 8260B mg/kg 1600 23000 NE NE
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/kg NE NE NE NE
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/kg NE NE NE NE
2,2-DICHLOROPROPANE 594-20-7 8260B mg/kg NE NE NE NE
DI-ISOPROPYL ETHER 108-20-3 8260B mg/kg 2200 9400 NE NE
ETHYLBENZENE 100-41-4 8260B mg/kg 5.8 25 5 23
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/kg 1.2 5.3 NE NE
ISOPROPYLBENZENE 98-82-8 8260B mg/kg 1900 9900 NE NE
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/kg NE NE NE NE
2-BUTANONE (MEK)78-93-3 8260B mg/kg 27000 190000 NE NE
METHYLENE CHLORIDE 75-09-2 8260B mg/kg 57 1000 NE NE
Client Sample ID
Lab Sample ID
Date Collected
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
1.2 0.259 0.707 1.01 0.253 0.691 1.99 0.255 0.697
<5.66 1.09 5.66 <5.53 1.06 5.53 2.09 J 1.07 5.58
<0.0707 0.0293 0.0707 <0.0691 0.0286 0.0691 0.177 0.0289 0.0697
<0.0141 0.00286 0.0141 <0.0138 0.00279 0.0138 <0.0139 J3 0.00282 0.0139
0.138 0.000531 0.00141 0.105 0.000518 0.00138 0.205 J3 V 0.000523 0.00139
<0.00141 0.000389 0.00141 <0.00138 0.00038 0.00138 0.000835 J J3 0.000383 0.00139
<0.00141 0.00103 0.00141 <0.00138 0.001 0.00138 <0.00139 J3 0.00101 0.00139
<0.00141 0.0006 0.00141 <0.00138 0.000586 0.00138 <0.00139 J3 0.000591 0.00139
<0.00707 0.00166 0.00707 <0.00691 0.00162 0.00691 <0.00697 J3 0.00163 0.00697
0.00045 J 0.000365 0.00141 0.000398 J 0.000357 0.00138 0.000693 J J3 0.00036 0.00139
0.000395 J 0.000284 0.00141 0.000344 J 0.000278 0.00138 0.000747 J J3 0.00028 0.00139
<0.00141 0.000291 0.00141 <0.00138 0.000285 0.00138 <0.00139 J3 0.000287 0.00139
<0.00141 0.000351 0.00141 <0.00138 0.000343 0.00138 <0.00139 J3 0.000346 0.00139
<0.00141 0.000272 0.00141 <0.00138 0.000265 0.00138 <0.00139 J3 0.000268 0.00139
<0.00141 0.000317 0.00141 <0.00138 0.00031 0.00138 <0.00139 J3 0.000312 0.00139
<0.00707 0.00141 0.00707 <0.00691 0.00138 0.00691 <0.00697 J3 0.00139 0.00697
<0.00707 0.00146 0.00707 <0.00691 0.00142 0.00691 <0.00697 J3 0.00144 0.00697
<0.00354 0.00092 0.00354 <0.00346 0.000899 0.00346 <0.00349 J3 0.000906 0.00349
<0.00141 0.000318 0.00141 <0.00138 0.000311 0.00138 0.00088 J J3 0.000314 0.00139
<0.00141 0.000978 0.00141 <0.00138 0.000955 0.00138 <0.00139 J3 0.000963 0.00139
<0.00707 0.00269 0.00707 <0.00691 0.00263 0.00691 <0.00697 0.00265 0.00697
<0.00141 0.000354 0.00141 <0.00138 0.000346 0.00138 <0.00139 J3 0.000349 0.00139
<0.00141 0.000495 0.00141 <0.00138 0.000484 0.00138 <0.00139 0.000488 0.00139
<0.00141 0.000601 0.00141 <0.00138 0.000588 0.00138 <0.00139 J3 0.000592 0.00139
<0.00141 0.000849 0.00141 <0.00138 0.000829 0.00138 <0.00139 J3 0.000836 0.00139
<0.00141 0.00117 0.00141 <0.00138 0.00115 0.00138 <0.00139 J3 0.00116 0.00139
<0.00707 0.000406 0.00707 <0.00691 0.000397 0.00691 <0.00697 J3 0.0004 0.00697
<0.00141 0.000379 0.00141 <0.00138 0.00037 0.00138 <0.00139 J3 0.000374 0.00139
<0.00141 0.000637 0.00141 <0.00138 0.000622 0.00138 <0.00139 J3 0.000627 0.00139
<0.00141 0.000502 0.00141 <0.00138 0.000491 0.00138 <0.00139 J3 0.000495 0.00139
<0.00141 0.000672 0.00141 <0.00138 0.000657 0.00138 <0.00139 J3 0.000662 0.00139
<0.00141 0.000707 0.00141 <0.00138 0.000691 0.00138 <0.00139 J3 0.000697 0.00139
<0.00141 0.000232 0.00141 <0.00138 0.000227 0.00138 <0.00139 J3 0.000229 0.00139
<0.00141 0.000531 0.00141 <0.00138 0.000518 0.00138 <0.00139 J3 0.000523 0.00139
<0.00141 0.000318 0.00141 <0.00138 0.000311 0.00138 <0.00139 J3 0.000314 0.00139
<0.00141 0.000601 0.00141 <0.00138 0.000588 0.00138 <0.00139 J3 0.000592 0.00139
<0.00141 0.000955 0.00141 <0.00138 0.000933 0.00138 <0.00139 J3 0.000941 0.00139
<0.00141 0.000531 0.00141 <0.00138 0.000518 0.00138 <0.00139 J3 0.000523 0.00139
<0.00141 0.000313 0.00141 <0.00138 0.000306 0.00138 <0.00139 J3 0.000308 0.00139
0.0294 0.000424 0.00141 0.0235 0.000415 0.00138 0.0496 J3 J6 0.000418 0.00139
<0.00141 0.000484 0.00141 <0.00138 0.000473 0.00138 <0.00139 J3 0.000477 0.00139
0.003 0.000601 0.00141 0.00246 0.000588 0.00138 0.00453 J3 0.000592 0.00139
0.000538 J 0.000289 0.00141 0.000373 J 0.000282 0.00138 0.000934 J J3 0.000284 0.00139
0.0228 0.00662 0.0141 0.0281 0.00647 0.0138 0.0429 0.00652 0.0139
<0.00707 0.00141 0.00707 <0.00691 0.00138 0.00691 <0.00697 J3 0.00139 0.00697
04/14/2023 04/14/2023
L1606384-14 L1606384-16
SB-108-12-13
L1606384-18
SB-7-12-13 SB-8-12-13
04/14/2023
Page 5 of 6
Table C2 - VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units RSL
Residential
RSL
Industrial ISL Tier 1
TPH-GRO 8006-61-9 8260B mg/kg NE NE 150 1500
Client Sample ID
Lab Sample ID
Date Collected
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/kg 33000 140000 NE NE
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/kg 47 210 0.3 0.3
NAPHTHALENE 91-20-3 8260B mg/kg 2 8.6 51 51
N-PROPYLBENZENE 103-65-1 8260B mg/kg 3800 24000 NE NE
STYRENE 100-42-5 8260B mg/kg 6000 35000 NE NE
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/kg 2 8.8 NE NE
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/kg 0.6 2.7 NE NE
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/kg 6700 28000 NE NE
TETRACHLOROETHENE 127-18-4 8260B mg/kg 24 100 NE NE
TOLUENE 108-88-3 8260B mg/kg 4900 47000 9 25
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/kg 63 930 NE NE
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/kg 24 110 NE NE
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/kg 8100 36000 NE NE
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/kg 1.1 5 NE NE
TRICHLOROETHENE 79-01-6 8260B mg/kg 0.94 6 NE NE
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/kg 23000 350000 NE NE
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/kg 0.0051 0.11 NE NE
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/kg 300 1800 NE NE
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/kg 340 2000 NE NE
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/kg 270 1500 NE NE
VINYL CHLORIDE 75-01-4 8260B mg/kg 0.059 1.7 NE NE
XYLENES, TOTAL 1330-20-7 8260B mg/kg 580 2500 142 142
Qualifiers (Q):
NE:Not Established.<:Less than Reported Detection Limit (RDL).
mg/kg:Milligrams per kilogram.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential (Res.) and industrial (Ind.)
properties (November 2022; TR=1E-06; THQ=1.0).
Utah's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for petroleum releases at leaking
underground storage tank sites
Bold value exceeds Method Detection Limit (MDL).
J: The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for
precision.J5: The sample matrix interfered with the ability to make any accurate
determination; spike value is high.J6: The sample matrix interfered with the ability to
make any accurate determination; spike value is low. V: The sample concentration is too
high to evaluate accurate spike recoveries.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
04/14/2023 04/14/2023
L1606384-14 L1606384-16
SB-108-12-13
L1606384-18
SB-7-12-13 SB-8-12-13
04/14/2023
<0.0141 0.00134 0.0141 <0.0138 0.00131 0.0138 <0.0139 J3 0.00132 0.0139
<0.00141 0.000495 0.00141 <0.00138 0.000484 0.00138 <0.00139 J3 0.000488 0.00139
0.0202 0.00705 0.00707 0.0218 0.00688 0.00691 0.027 J6 0.00694 0.00697
0.00371 0.000291 0.00141 0.0027 0.000285 0.00138 0.00615 J3 0.000287 0.00139
<0.00141 0.000315 0.00141 <0.00138 0.000308 0.00138 <0.00139 J6 0.000311 0.00139
<0.00141 0.000419 0.00141 <0.00138 0.000409 0.00138 <0.00139 J3 0.000413 0.00139
<0.00141 0.000327 0.00141 <0.00138 0.000319 0.00138 <0.00139 J3 0.000322 0.00139
<0.00141 0.000603 0.00141 <0.00138 0.000589 0.00138 <0.00139 J3 0.000594 0.00139
<0.00141 0.00046 0.00141 <0.00138 0.000449 0.00138 <0.00139 J3 0.000453 0.00139
0.194 0.00174 0.00707 0.149 0.0017 0.00691 <0.224 0.0551 0.224
<0.00141 0.000433 0.00141 <0.00138 0.000423 0.00138 <0.00139 0.000427 0.00139
<0.00141 0.000549 0.00141 <0.00138 0.000536 0.00138 <0.00139 0.000541 0.00139
<0.00141 0.000523 0.00141 <0.00138 0.000511 0.00138 <0.00139 J3 0.000516 0.00139
<0.00141 0.000601 0.00141 <0.00138 0.000588 0.00138 <0.00139 J3 0.000592 0.00139
<0.00141 0.000283 0.00141 <0.00138 0.000276 0.00138 <0.00139 J3 0.000279 0.00139
<0.00707 0.000504 0.00707 <0.00691 0.000492 0.00691 <0.00697 J3 0.000496 0.00697
<0.00354 0.000345 0.00354 <0.00346 0.000337 0.00346 <0.00349 J3 0.00034 0.00349
0.00971 0.000299 0.00141 0.00852 0.000292 0.00138 0.0149 J3 J6 0.000294 0.00139
0.00349 0.000406 0.00141 0.00333 0.000397 0.00138 0.00534 J3 0.0004 0.00139
0.00393 0.000376 0.00141 0.003 0.000368 0.00138 0.00583 J3 0.000371 0.00139
<0.00141 0.00032 0.00141 <0.00138 0.000312 0.00138 <0.00139 J3 0.000315 0.00139
0.0705 0.000707 0.00424 0.056 0.000691 0.00415 0.109 J3 J6 0.000697 0.00418
Page 6 of 6
Table C3 - Polycyclic Aromatic Hydrocarbons in Soil
GIV Development - Citizens West - 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Tast 3.28
Method Analyte CAS Method Units RSL
Residential
RSL
Industrial Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/kg 18000 230000 0.0145 0.0028 0.00731 0.0332 J 0.0263 0.069 0.127 J3 J5 0.00269 0.00701
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/kg 3600 45000 0.00449 J 0.00254 0.00731 <0.0686 0.0239 0.069 0.0513 J3 J5 0.00244 0.00701
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/kg NE NE 0.00315 J 0.00263 0.00731 0.0279 J 0.0247 0.069 0.017 J3 J5 0.00252 0.00701
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/kg 1.1 21 0.0508 0.00211 0.00731 0.189 0.0198 0.069 0.506 J3 V 0.00202 0.00701
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/kg 0.11 2.1 0.0532 0.00218 0.00731 0.212 0.0205 0.069 0.481 J3 V 0.00209 0.00701
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/kg 1.1 21 0.0547 0.00186 0.00731 0.215 0.0175 0.069 0.607 J3 V 0.00179 0.00701
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/kg NE NE 0.0326 0.00216 0.00731 0.157 0.0202 0.069 0.28 J3 J5 0.00207 0.00701
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/kg 11 210 0.022 0.00262 0.00731 0.0831 0.0246 0.069 0.208 J3 J5 0.00251 0.00701
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/kg 110 2100 0.0573 0.00282 0.00731 0.183 0.0265 0.069 0.58 J3 V 0.00271 0.00701
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/kg 0.11 2.1 0.00703 J 0.00209 0.00731 0.0298 J 0.0197 0.069 0.0672 J3 J5 0.00201 0.00701
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/kg 2400 30000 0.101 0.00276 0.00731 0.326 0.026 0.069 0.941 J3 V 0.00265 0.00701
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/kg 2400 30000 0.00335 J 0.0025 0.00731 <0.0686 0.0234 0.069 0.0332 J3 J5 0.00239 0.00701
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/kg 1.1 21 0.0351 0.0022 0.00731 0.149 0.0207 0.069 0.325 J3 J5 0.00211 0.00701
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/kg 2 8.6 0.00581 J 0.00497 0.0244 <0.229 0.0467 0.229 0.0145 J J3 J5 0.00476 0.0234
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/kg NE NE 0.0528 0.00281 0.00731 0.126 0.0264 0.069 0.537 J3 V 0.0027 0.00701
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/kg 1800 23000 0.106 0.00244 0.00731 0.364 0.0229 0.069 0.939 J3 V 0.00234 0.00701
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/kg 18 73 0.00694 J 0.00547 0.0244 <0.229 0.0513 0.229 0.0141 J J3 J5 0.00524 0.0234
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/kg 240 3000 0.00671 J 0.0052 0.0244 <0.229 0.0488 0.229 0.0105 J J3 J5 0.00499 0.0234
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/kg 4800 60000 <0.0244 0.00567 0.0244 <0.229 0.0533 0.229 <0.0234 0.00544 0.0234
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for precision.
J5: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
V: The sample concentration is too high to evaluate accurate spike recoveries.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/kg:Milligrams per kilogram.
Bold value exceeds laboratory RDL.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential and industrial properties
(November 2022; TR=1E-06; THQ=1.0).
04/14/2023 04/14/2023 04/14/2023
SB-1-1.5-2 SB-2-2.5-4 SB-3-1-2
L1606384-01 L1606384-03 L1606384-05Lab Sample ID
Date Collected
Client Sample ID
Page 1 of 3
Table C3 - Polycyclic Aromatic Hydrocarbons in Soil
GIV Development - Citizens West - 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Tast 3.28
Method Analyte CAS Method Units RSL
Residential
RSL
Industrial
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/kg 18000 230000
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/kg 3600 45000
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/kg NE NE
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/kg 1.1 21
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/kg 0.11 2.1
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/kg 1.1 21
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/kg NE NE
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/kg 11 210
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/kg 110 2100
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/kg 0.11 2.1
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/kg 2400 30000
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/kg 2400 30000
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/kg 1.1 21
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/kg 2 8.6
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/kg NE NE
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/kg 1800 23000
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/kg 18 73
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/kg 240 3000
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/kg 4800 60000
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for precision.
J5: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
V: The sample concentration is too high to evaluate accurate spike recoveries.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/kg:Milligrams per kilogram.
Bold value exceeds laboratory RDL.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential and industrial properties
(November 2022; TR=1E-06; THQ=1.0).
Lab Sample ID
Date Collected
Client Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
0.143 0.0263 0.0687 0.00253 J 0.00237 0.00619 0.00523 J 0.00299 0.008
0.0526 J 0.0239 0.0687 <0.00619 0.00216 0.00619 0.00312 J 0.00272 0.008
0.0356 J 0.0247 0.0687 <0.00619 0.00223 0.00619 <0.00781 0.00281 0.008
0.553 0.0198 0.0687 0.0141 0.00178 0.00619 0.0163 0.00225 0.008
0.604 0.0205 0.0687 0.0161 0.00185 0.00619 0.0174 0.00233 0.008
0.599 0.0175 0.0687 0.027 0.00158 0.00619 0.0173 0.00199 0.008
0.4 0.0203 0.0687 0.0479 0.00183 0.00619 0.0121 0.0023 0.008
0.23 0.0246 0.0687 0.0033 J 0.00222 0.00619 0.00713 J 0.0028 0.008
0.57 0.0266 0.0687 0.0333 0.00239 0.00619 0.0219 0.00302 0.008
0.0857 0.0197 0.0687 0.00949 0.00177 0.00619 0.0026 J 0.00224 0.008
1.16 0.026 0.0687 0.0127 0.00234 0.00619 0.0355 0.00296 0.008
0.0333 J 0.0235 0.0687 <0.00619 0.00211 0.00619 <0.00781 0.00267 0.008
0.421 0.0207 0.0687 0.0085 0.00187 0.00619 0.0129 0.00236 0.008
<0.229 0.0467 0.229 0.00502 J 0.00421 0.0206 0.00578 J 0.00531 0.026
0.553 0.0265 0.0687 0.0486 0.00238 0.00619 0.0238 0.00301 0.008
1.17 0.0229 0.0687 0.044 0.00206 0.00619 0.0392 0.0026 0.008
0.0593 J 0.0514 0.229 0.0164 J 0.00463 0.0206 0.00668 J 0.00585 0.026
0.0559 J 0.0489 0.229 0.0238 0.0044 0.0206 0.00836 J 0.00556 0.026
<0.229 0.0534 0.229 <0.0206 0.00481 0.0206 <0.0260 0.00607 0.026
04/14/2023 04/14/202304/14/2023
SB-6-3-4SB-4-1-1.5
L1606384-11
SB-5-1-2
L1606384-07 L1606384-09
Page 2 of 3
Table C3 - Polycyclic Aromatic Hydrocarbons in Soil
GIV Development - Citizens West - 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Tast 3.28
Method Analyte CAS Method Units RSL
Residential
RSL
Industrial
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/kg 18000 230000
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/kg 3600 45000
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/kg NE NE
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/kg 1.1 21
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/kg 0.11 2.1
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/kg 1.1 21
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/kg NE NE
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/kg 11 210
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/kg 110 2100
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/kg 0.11 2.1
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/kg 2400 30000
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/kg 2400 30000
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/kg 1.1 21
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/kg 2 8.6
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/kg NE NE
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/kg 1800 23000
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/kg 18 73
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/kg 240 3000
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/kg 4800 60000
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for precision.
J5: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
V: The sample concentration is too high to evaluate accurate spike recoveries.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/kg:Milligrams per kilogram.
Bold value exceeds laboratory RDL.
Color shaded value exceeds screening level.
EPA RSL: Environmental Protection Agency Regional Screening Levels for soil at residential and industrial properties
(November 2022; TR=1E-06; THQ=1.0).
Lab Sample ID
Date Collected
Client Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
0.00637 J 0.00255 0.0067 0.166 0.00267 0.007 0.0415 J 0.027 0.071
<0.00665 0.00232 0.0067 0.182 0.00242 0.007 <0.0705 0.0246 0.071
0.00429 J 0.00239 0.0067 0.00502 J 0.0025 0.007 <0.0705 0.0254 0.071
0.0265 0.00192 0.0067 0.383 0.00201 0.007 0.383 0.0203 0.071
0.0324 0.00198 0.0067 0.408 0.00208 0.007 0.434 0.021 0.071
0.0426 0.0017 0.0067 0.364 0.00177 0.007 0.429 0.018 0.071
0.0238 0.00196 0.0067 0.253 0.00205 0.007 0.382 0.0208 0.071
0.0145 0.00238 0.0067 0.146 0.00249 0.007 0.125 0.0253 0.071
0.0348 0.00257 0.0067 0.454 0.00269 0.007 0.349 0.0273 0.071
0.0057 J 0.00191 0.0067 0.0467 0.00199 0.007 0.0697 J 0.0202 0.071
0.0457 0.00252 0.0067 1.06 0.00263 0.007 1.13 0.0267 0.071
<0.00665 0.00227 0.0067 0.0573 0.00238 0.007 <0.0705 0.0241 0.071
0.0276 0.00201 0.0067 0.275 0.0021 0.007 0.239 0.0213 0.071
0.0123 J 0.00452 0.0222 0.0141 J 0.00473 0.0232 <0.235 0.048 0.235
0.0309 0.00256 0.0067 0.843 0.00268 0.007 0.141 0.0272 0.071
0.0489 0.00222 0.0067 1.07 0.00232 0.007 1.34 0.0235 0.071
0.0223 0.00498 0.0222 0.0329 0.00521 0.0232 <0.235 0.0528 0.235
0.0249 0.00473 0.0222 0.0202 J 0.00495 0.0232 <0.235 0.0502 0.235
<0.0222 0.00517 0.0222 <0.0232 0.0054 0.0232 <0.235 0.0548 0.235
04/14/2023
SB-108-2-3SB-7-2.5-3.5 SB-8-2-3
04/14/2023 04/14/2023
L1606384-13 L1606384-15 L1606384-17
Page 3 of 3
Table C4 - Dissolved Metals in Groundwater
GIV Development- Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL UGWQS Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
ARSENIC 7440-38-2 6010B mg/l 0.01 0.05 0.00661 J 0.0044 0.01 0.0146 0.0044 0.01 <0.0100 0.0044 0.01
BARIUM 7440-39-3 6010B mg/l 2 2 0.0695 0.000736 0.005 0.0969 0.000736 0.005 0.117 0.000736 0.005
CADMIUM 7440-43-9 6010B mg/l 0.005 0.005 <0.00200 0.000479 0.002 0.000497 J 0.000479 0.002 <0.00200 0.000479 0.002
CHROMIUM 7440-47-3 6010B mg/l 0.1 0.1 <0.0100 0.0014 0.01 <0.0100 0.0014 0.01 <0.0100 0.0014 0.01
LEAD 7439-92-1 6010B mg/l 0.015 0.015 <0.00600 0.00299 0.006 0.00367 J 0.00299 0.006 <0.00600 0.00299 0.006
MERCURY 7439-97-6 7470 mg/l 0.002 0.002 <0.0100 0.00735 0.01 <0.0100 0.00735 0.01 0.011 B 0.00735 0.01
SELENIUM 7782-49-2 6010B mg/l 0.05 0.05 <0.00500 0.00154 0.005 <0.00500 0.00154 0.005 <0.00500 0.00154 0.005
SILVER 7440-22-4 6010B mg/l NE 0.1 <0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Qualifiers (Q):
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water
(November 2022).
J: The identification of the analyte is acceptable; the reported value is an estimate.
SB-1 SB-2 SB-3
B:Analyte was detected in the associated blank.
Lab Sample ID
Bold value exceeds Method Detection Limit (MDL). Color shaded value exceeds screening level.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
UGWQS:Utah Ground Water Quality Standards.
Client Sample ID
Date Collected 04/14/2023 04/14/2023 04/14/2023
L1606417-01 L1606417-02 L1606417-03
Page 1 of 3
Table C4 - Dissolved Metals in Groundwater
GIV Development- Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL UGWQS
ARSENIC 7440-38-2 6010B mg/l 0.01 0.05
BARIUM 7440-39-3 6010B mg/l 2 2
CADMIUM 7440-43-9 6010B mg/l 0.005 0.005
CHROMIUM 7440-47-3 6010B mg/l 0.1 0.1
LEAD 7439-92-1 6010B mg/l 0.015 0.015
MERCURY 7439-97-6 7470 mg/l 0.002 0.002
SELENIUM 7782-49-2 6010B mg/l 0.05 0.05
SILVER 7440-22-4 6010B mg/l NE 0.1
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Qualifiers (Q):
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water
(November 2022).
J: The identification of the analyte is acceptable; the reported value is an estimate.
B:Analyte was detected in the associated blank.
Lab Sample ID
Bold value exceeds Method Detection Limit (MDL).Color shaded value exceeds screening level.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
UGWQS:Utah Ground Water Quality Standards.
Client Sample ID
Date Collected
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
0.0114 0.0044 0.01 <0.0100 0.0044 0.01 0.00566 J 0.0044 0.01
0.28 0.000736 0.005 0.0827 0.000736 0.005 0.108 0.000736 0.005
0.00111 J 0.000479 0.002 <0.00200 0.000479 0.002 0.000806 J 0.000479 0.002
<0.0100 0.0014 0.01 0.00173 B J 0.0014 0.01 0.00149 B J 0.0014 0.01
<0.00600 0.00299 0.006 <0.00600 0.00299 0.006 <0.00600 0.00299 0.006
<0.0100 0.00735 0.01 <0.0100 0.00735 0.01 0.0202 0.00735 0.01
<0.00500 0.00154 0.005 <0.00500 0.00154 0.005 <0.00500 0.00154 0.005
<0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002
SB-4
04/14/2023 04/14/2023 04/14/2023
SB-5 SB-6
L1606417-04 L1606417-05 L1606417-06
Page 2 of 3
Table C4 - Dissolved Metals in Groundwater
GIV Development- Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL UGWQS
ARSENIC 7440-38-2 6010B mg/l 0.01 0.05
BARIUM 7440-39-3 6010B mg/l 2 2
CADMIUM 7440-43-9 6010B mg/l 0.005 0.005
CHROMIUM 7440-47-3 6010B mg/l 0.1 0.1
LEAD 7439-92-1 6010B mg/l 0.015 0.015
MERCURY 7439-97-6 7470 mg/l 0.002 0.002
SELENIUM 7782-49-2 6010B mg/l 0.05 0.05
SILVER 7440-22-4 6010B mg/l NE 0.1
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Qualifiers (Q):
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water
(November 2022).
J: The identification of the analyte is acceptable; the reported value is an estimate.
B:Analyte was detected in the associated blank.
Lab Sample ID
Bold value exceeds Method Detection Limit (MDL).Color shaded value exceeds screening level.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
UGWQS:Utah Ground Water Quality Standards.
Client Sample ID
Date Collected
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
<0.0100 0.0044 0.01 <0.0100 0.0044 0.01 0.00473 J 0.0044 0.01
0.0664 0.000736 0.005 0.1 0.000736 0.005 0.0999 0.000736 0.005
<0.00200 0.000479 0.002 <0.00200 0.000479 0.002 <0.00200 0.000479 0.002
<0.0100 0.0014 0.01 0.00211 B J 0.0014 0.01 <0.0100 0.0014 0.01
<0.00600 0.00299 0.006 <0.00600 0.00299 0.006 <0.00600 0.00299 0.006
<0.0100 0.00735 0.01 0.0251 0.00735 0.01 0.0187 0.00735 0.01
<0.00500 0.00154 0.005 <0.00500 0.00154 0.005 <0.00500 0.00154 0.005
<0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002 <0.000200 0.0001 0.0002
L1606417-10
SB-108
04/14/2023 04/14/2023 04/14/2023
SB-7 SB-8
L1606417-07 L1606417-08
Page 3 of 3
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
TPH-DRO 68334-30-5 3511/8015 mg/l NE NE NE 1 10 NE 0.0587 J 0.0247 0.1 0.0866 J 0.0247 0.1 0.0417 J 0.0247 0.1
TPH-GRO 8006-61-9 8260B mg/l NE NE NE 1 10 NE <0.500 0.108 0.5 <0.500 0.108 0.5 <0.500 0.108 0.5
ACETONE 67-64-1 8260B mg/l NE 22500 94500 NE NE NE <0.0500 0.0113 0.05 <0.0500 0.0113 0.05 <0.0500 0.0113 0.05
ACROLEIN 107-02-8 8260B mg/l NE 0.00418 0.0176 NE NE NE <0.0500 0.00254 0.05 <0.0500 0.00254 0.05 <0.0500 0.00254 0.05
ACRYLONITRILE 107-13-1 8260B mg/l NE 0.00732 0.032 NE NE NE <0.0100 0.000671 0.01 <0.0100 0.000671 0.01 <0.0100 0.000671 0.01
BENZENE 71-43-2 8260B mg/l 0.005 0.00159 0.00693 0.005 0.3 0.005 <0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001
BROMOBENZENE 108-86-1 8260B mg/l NE 0.62 2.6 NE NE NE <0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
BROMODICHLOROMETHANE 75-27-4 8260B mg/l 0.08 0.000876 0.00382 NE NE NE <0.00100 0.000136 0.001 <0.00100 0.000136 0.001 <0.00100 0.000136 0.001
BROMOFORM 75-25-2 8260B mg/l 0.08 0.117 0.51 NE NE NE <0.00100 0.000129 0.001 <0.00100 0.000129 0.001 <0.00100 0.000129 0.001
BROMOMETHANE 74-83-9 8260B mg/l NE 0.0174 0.073 NE NE NE <0.00500 0.000605 0.005 <0.00500 0.000605 0.005 <0.00500 0.000605 0.005
N-BUTYLBENZENE 104-51-8 8260B mg/l NE NE NE NE NE NE <0.00100 0.000157 0.001 <0.00100 0.000157 0.001 <0.00100 0.000157 0.001
SEC-BUTYLBENZENE 135-98-8 8260B mg/l NE NE NE NE NE NE <0.00100 0.000125 0.001 <0.00100 0.000125 0.001 <0.00100 0.000125 0.001
TERT-BUTYLBENZENE 98-06-6 8260B mg/l NE NE NE NE NE NE <0.00100 0.000127 0.001 <0.00100 0.000127 0.001 <0.00100 0.000127 0.001
CARBON TETRACHLORIDE 56-23-5 8260B mg/l 0.005 0.000415 0.00181 NE NE 0.005 <0.00100 0.000128 0.001 <0.00100 0.000128 0.001 <0.00100 0.000128 0.001
CHLOROBENZENE 108-90-7 8260B mg/l 0.1 0.41 1.72 NE NE 0.1 <0.00100 0.000116 0.001 <0.00100 0.000116 0.001 <0.00100 0.000116 0.001
CHLORODIBROMOMETHANE 124-48-1 8260B mg/l 0.08 NE NE NE NE NE <0.00100 0.00014 0.001 <0.00100 0.00014 0.001 <0.00100 0.00014 0.001
CHLOROETHANE 75-00-3 8260B mg/l NE 23 96.5 NE NE NE <0.00500 0.000192 0.005 <0.00500 0.000192 0.005 <0.00500 0.000192 0.005
CHLOROFORM 67-66-3 8260B mg/l 0.08 0.000814 0.00355 NE NE NE <0.00500 0.000111 0.005 <0.00500 0.000111 0.005 0.000364 J 0.000111 0.005
CHLOROMETHANE 74-87-3 8260B mg/l NE 0.26 1.09 NE NE NE <0.00250 0.00096 0.003 <0.00250 0.00096 0.003 <0.00250 0.00096 0.0025
2-CHLOROTOLUENE 95-49-8 8260B mg/l NE NE NE NE NE NE <0.00100 0.000106 0.001 <0.00100 0.000106 0.001 <0.00100 0.000106 0.001
4-CHLOROTOLUENE 106-43-4 8260B mg/l NE NE NE NE NE NE <0.00100 0.000114 0.001 <0.00100 0.000114 0.001 <0.00100 0.000114 0.001
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/l 0.0002 0.0000281 0.00034 NE NE 0.0002 <0.00500 0.000276 0.005 <0.00500 0.000276 0.005 <0.00500 0.000276 0.005
1,2-DIBROMOETHANE 106-93-4 8260B mg/l 5E-05 0.000176 0.000769 NE NE 0.00005 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
DIBROMOMETHANE 74-95-3 8260B mg/l NE 0.124 0.521 NE NE NE <0.00100 0.000122 0.001 <0.00100 0.000122 0.001 <0.00100 0.000122 0.001
1,2-DICHLOROBENZENE 95-50-1 8260B mg/l 0.6 2.66 11.2 NE NE 0.6 <0.00100 0.000107 0.001 <0.00100 0.000107 0.001 <0.00100 0.000107 0.001
1,3-DICHLOROBENZENE 541-73-1 8260B mg/l NE NE NE NE NE NE <0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
1,4-DICHLOROBENZENE 106-46-7 8260B mg/l 0.075 0.00259 0.0113 NE NE 0.075 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/l NE 0.00744 0.0312 NE NE NE <0.00500 0.000374 0.005 <0.00500 0.000374 0.005 <0.00500 0.000374 0.005
1,1-DICHLOROETHANE 75-34-3 8260B mg/l NE 0.00764 0.0334 NE NE NE <0.00100 0.0001 0.001 <0.00100 0.0001 0.001 <0.00100 0.0001 0.001
1,2-DICHLOROETHANE 107-06-2 8260B mg/l 0.005 0.00224 0.00978 NE NE 0.005 <0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001
1,1-DICHLOROETHENE 75-35-4 8260B mg/l 0.007 0.195 0.821 NE NE 0.007 <0.00100 0.000188 0.001 <0.00100 0.000188 0.001 <0.00100 0.000188 0.001
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/l 0.07 NE NE NE NE 0.07 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/l 0.1 0.109 0.457 NE NE 0.1 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
1,2-DICHLOROPROPANE 78-87-5 8260B mg/l 0.005 0.00658 0.0287 NE NE 0.005 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
1,1-DICHLOROPROPENE 563-58-6 8260B mg/l NE NE NE NE NE NE <0.00100 0.000142 0.001 <0.00100 0.000142 0.001 <0.00100 0.000142 0.001
1,3-DICHLOROPROPANE 142-28-9 8260B mg/l NE NE NE NE NE NE <0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/l NE NE NE NE NE NE <0.00100 0.000111 0.001 <0.00100 0.000111 0.001 <0.00100 0.000111 0.001
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/l NE NE NE NE NE NE <0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
2,2-DICHLOROPROPANE 594-20-7 8260B mg/l NE NE NE NE NE NE <0.00100 0.000161 0.001 <0.00100 0.000161 0.001 <0.00100 0.000161 0.001
DI-ISOPROPYL ETHER 108-20-3 8260B mg/l NE 6.97 29.3 NE NE NE <0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
ETHYLBENZENE 100-41-4 8260B mg/l 0.7 0.00349 0.0152 0.7 4 0.7 <0.00100 0.000137 0.001 <0.00100 0.000137 0.001 <0.00100 0.000137 0.001
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/l NE 0.000303 0.00132 NE NE NE <0.00100 0.000337 0.001 <0.00100 0.000337 0.001 <0.00100 0.000337 0.001
Date Collected
Lab Sample ID
Client Sample ID SB-1 SB-2 SB-3
04/14/2023 04/14/2023 04/14/2023
L1606417-01 L1606417-02 L1606417-03
Page 1 of 6
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
Date Collected
Lab Sample ID
Client Sample ID SB-1 SB-2 SB-3
04/14/2023 04/14/2023 04/14/2023
L1606417-01 L1606417-02 L1606417-03
ISOPROPYLBENZENE 98-82-8 8260B mg/l NE 0.887 3.73 NE NE NE <0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/l NE NE NE NE NE NE <0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
2-BUTANONE (MEK)78-93-3 8260B mg/l NE 2240 9410 NE NE NE <0.0100 0.00119 0.01 <0.0100 0.00119 0.01 <0.0100 0.00119 0.01
METHYLENE CHLORIDE 75-09-2 8260B mg/l 0.005 0.763 9.23 NE NE 0.005 <0.00500 0.00043 0.005 <0.00500 0.00043 0.005 <0.00500 0.00043 0.005
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/l NE 555 2330 NE NE NE <0.0100 0.000478 0.01 <0.0100 0.000478 0.01 <0.0100 0.000478 0.01
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/l NE 0.45 1.97 0.2 0.2 NE <0.00100 0.000101 0.001 <0.00100 0.000101 0.001 <0.00100 0.000101 0.001
NAPHTHALENE 91-20-3 8260B mg/l NE 0.00459 0.0201 0.7 0.7 NE <0.00500 0.001 0.005 <0.00500 0.001 0.005 <0.00500 0.001 0.005
N-PROPYLBENZENE 103-65-1 8260B mg/l NE 2.43 10.2 NE NE NE <0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001
STYRENE 100-42-5 8260B mg/l 0.1 9.28 39 NE NE 0.1 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/l NE 0.00371 0.0162 NE NE NE <0.00100 0.000147 0.001 <0.00100 0.000147 0.001 <0.00100 0.000147 0.001
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/l NE 0.00323 0.0141 NE NE NE <0.00100 0.000133 0.001 <0.00100 0.000133 0.001 <0.00100 0.000133 0.001
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/l NE 0.242 1.02 NE NE NE <0.00100 0.00018 0.001 <0.00100 0.00018 0.001 <0.00100 0.00018 0.001
TETRACHLOROETHENE 127-18-4 8260B mg/l 0.005 0.0149 0.0652 NE NE 0.005 <0.00100 0.0003 0.001 <0.00100 0.0003 0.001 <0.00100 0.0003 0.001
TOLUENE 108-88-3 8260B mg/l 1 19.2 80.7 1 3 1 <0.00100 0.000278 0.001 <0.00100 0.000278 0.001 <0.00100 0.000278 0.001
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/l NE NE NE NE NE NE <0.00100 0.00023 0.001 <0.00100 0.00023 0.001 <0.00100 0.00023 0.001
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/l 0.07 0.0359 0.151 NE NE 0.07 <0.00100 0.000481 0.001 <0.00100 0.000481 0.001 <0.00100 0.000481 0.001
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/l 0.2 7.42 31.1 NE NE 0.2 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/l 0.005 0.00521 0.0228 NE NE 0.005 <0.00100 0.000158 0.001 <0.00100 0.000158 0.001 <0.00100 0.000158 0.001
TRICHLOROETHENE 79-01-6 8260B mg/l 0.005 0.00119 0.00743 NE NE 0.005 <0.00100 0.00019 0.001 <0.00100 0.00019 0.001 <0.00100 0.00019 0.001
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/l NE NE NE NE NE NE <0.00500 0.00016 0.005 <0.00500 0.00016 0.005 <0.00500 0.00016 0.005
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/l NE 0.0223 0.0937 NE NE NE <0.00250 0.000237 0.003 <0.00250 0.000237 0.003 <0.00250 0.000237 0.0025
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/l NE 0.248 1.04 NE NE NE <0.00100 0.000322 0.001 <0.00100 0.000322 0.001 <0.00100 0.000322 0.001
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/l NE 0.351 1.47 NE NE NE <0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/l NE 0.175 0.733 NE NE NE <0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
VINYL CHLORIDE 75-01-4 8260B mg/l 0.002 0.000147 0.00245 NE NE 0.002 <0.00100 0.000234 0.001 <0.00100 0.000234 0.001 <0.00100 0.000234 0.001
XYLENES, TOTAL 1330-20-7 8260B mg/l 10 0.385 1.62 10 10 10 <0.00300 0.000174 0.003 <0.00300 0.000174 0.003 <0.00300 0.000174 0.003
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE NE NE NE <0.0500 J6 0.000575 0.05 <0.0500 0.000575 0.05 <0.0500 0.000575 0.05
J: The identification of the analyte is acceptable; the reported value is an estimate.
J6: The sample matrix interfered with the ability to make any accurate determination; spike value is low.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds Method Detection Limit (MDL). Color shaded value exceeds screening level.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2022.
Qualifiers (Q):
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2022).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (Novemver 2022).
UDEQ: Utah Department of Environmental Quality's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for
petroleum hydrocarbons in groundwater at underground storage tank sites.
UGWQS:Utah Ground Water Quality Standards.
Page 2 of 6
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
TPH-DRO 68334-30-5 3511/8015 mg/l NE NE NE 1 10 NE
TPH-GRO 8006-61-9 8260B mg/l NE NE NE 1 10 NE
ACETONE 67-64-1 8260B mg/l NE 22500 94500 NE NE NE
ACROLEIN 107-02-8 8260B mg/l NE 0.00418 0.0176 NE NE NE
ACRYLONITRILE 107-13-1 8260B mg/l NE 0.00732 0.032 NE NE NE
BENZENE 71-43-2 8260B mg/l 0.005 0.00159 0.00693 0.005 0.3 0.005
BROMOBENZENE 108-86-1 8260B mg/l NE 0.62 2.6 NE NE NE
BROMODICHLOROMETHANE 75-27-4 8260B mg/l 0.08 0.000876 0.00382 NE NE NE
BROMOFORM 75-25-2 8260B mg/l 0.08 0.117 0.51 NE NE NE
BROMOMETHANE 74-83-9 8260B mg/l NE 0.0174 0.073 NE NE NE
N-BUTYLBENZENE 104-51-8 8260B mg/l NE NE NE NE NE NE
SEC-BUTYLBENZENE 135-98-8 8260B mg/l NE NE NE NE NE NE
TERT-BUTYLBENZENE 98-06-6 8260B mg/l NE NE NE NE NE NE
CARBON TETRACHLORIDE 56-23-5 8260B mg/l 0.005 0.000415 0.00181 NE NE 0.005
CHLOROBENZENE 108-90-7 8260B mg/l 0.1 0.41 1.72 NE NE 0.1
CHLORODIBROMOMETHANE 124-48-1 8260B mg/l 0.08 NE NE NE NE NE
CHLOROETHANE 75-00-3 8260B mg/l NE 23 96.5 NE NE NE
CHLOROFORM 67-66-3 8260B mg/l 0.08 0.000814 0.00355 NE NE NE
CHLOROMETHANE 74-87-3 8260B mg/l NE 0.26 1.09 NE NE NE
2-CHLOROTOLUENE 95-49-8 8260B mg/l NE NE NE NE NE NE
4-CHLOROTOLUENE 106-43-4 8260B mg/l NE NE NE NE NE NE
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/l 0.0002 0.0000281 0.00034 NE NE 0.0002
1,2-DIBROMOETHANE 106-93-4 8260B mg/l 5E-05 0.000176 0.000769 NE NE 0.00005
DIBROMOMETHANE 74-95-3 8260B mg/l NE 0.124 0.521 NE NE NE
1,2-DICHLOROBENZENE 95-50-1 8260B mg/l 0.6 2.66 11.2 NE NE 0.6
1,3-DICHLOROBENZENE 541-73-1 8260B mg/l NE NE NE NE NE NE
1,4-DICHLOROBENZENE 106-46-7 8260B mg/l 0.075 0.00259 0.0113 NE NE 0.075
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/l NE 0.00744 0.0312 NE NE NE
1,1-DICHLOROETHANE 75-34-3 8260B mg/l NE 0.00764 0.0334 NE NE NE
1,2-DICHLOROETHANE 107-06-2 8260B mg/l 0.005 0.00224 0.00978 NE NE 0.005
1,1-DICHLOROETHENE 75-35-4 8260B mg/l 0.007 0.195 0.821 NE NE 0.007
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/l 0.07 NE NE NE NE 0.07
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/l 0.1 0.109 0.457 NE NE 0.1
1,2-DICHLOROPROPANE 78-87-5 8260B mg/l 0.005 0.00658 0.0287 NE NE 0.005
1,1-DICHLOROPROPENE 563-58-6 8260B mg/l NE NE NE NE NE NE
1,3-DICHLOROPROPANE 142-28-9 8260B mg/l NE NE NE NE NE NE
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/l NE NE NE NE NE NE
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/l NE NE NE NE NE NE
2,2-DICHLOROPROPANE 594-20-7 8260B mg/l NE NE NE NE NE NE
DI-ISOPROPYL ETHER 108-20-3 8260B mg/l NE 6.97 29.3 NE NE NE
ETHYLBENZENE 100-41-4 8260B mg/l 0.7 0.00349 0.0152 0.7 4 0.7
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/l NE 0.000303 0.00132 NE NE NE
Date Collected
Lab Sample ID
Client Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
<0.100 0.0247 0.1 0.0286 J 0.0247 0.1 0.056 J 0.0247 0.1
<0.500 0.108 0.5 <0.500 0.108 0.5 <0.500 0.108 0.5
<0.0500 0.0113 0.05 <0.0500 0.0113 0.05 <0.0500 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 0.00254 0.05 <0.0500 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 0.000671 0.01 <0.0100 0.000671 0.01
<0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000136 0.001 <0.00100 0.000136 0.001 <0.00100 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 0.000605 0.005 <0.00500 0.000605 0.005
<0.00100 0.000157 0.001 <0.00100 0.000157 0.001 <0.00100 0.000157 0.001
<0.00100 0.000125 0.001 <0.00100 0.000125 0.001 <0.00100 0.000125 0.001
<0.00100 0.000127 0.001 <0.00100 0.000127 0.001 <0.00100 0.000127 0.001
<0.00100 0.000128 0.001 <0.00100 0.000128 0.001 <0.00100 0.000128 0.001
<0.00100 0.000116 0.001 <0.00100 0.000116 0.001 <0.00100 0.000116 0.001
<0.00100 0.00014 0.001 <0.00100 0.00014 0.001 <0.00100 0.00014 0.001
<0.00500 0.000192 0.005 <0.00500 0.000192 0.005 <0.00500 0.000192 0.005
<0.00500 0.000111 0.005 <0.00500 0.000111 0.005 0.000319 J 0.000111 0.005
<0.00250 0.00096 0.003 <0.00250 0.00096 0.0025 <0.00250 0.00096 0.003
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
0.000265 J 0.000122 0.001 <0.00100 0.000122 0.001 <0.00100 0.000122 0.001
<0.00100 0.000107 0.001 <0.00100 0.000107 0.001 <0.00100 0.000107 0.001
<0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.00500 0.000374 0.005 <0.00500 0.000374 0.005 <0.00500 0.000374 0.005
<0.00100 0.0001 0.001 <0.00100 0.0001 0.001 <0.00100 0.0001 0.001
<0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001
<0.00100 0.000188 0.001 <0.00100 0.000188 0.001 <0.00100 0.000188 0.001
0.000156 J 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
0.00176 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000142 0.001 <0.00100 0.000142 0.001 <0.00100 0.000142 0.001
<0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.000111 0.001 <0.00100 0.000111 0.001 <0.00100 0.000111 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000161 0.001 <0.00100 0.000161 0.001 <0.00100 0.000161 0.001
<0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.000137 0.001 <0.00100 0.000137 0.001 <0.00100 0.000137 0.001
<0.00100 0.000337 0.001 <0.00100 0.000337 0.001 <0.00100 0.000337 0.001
SB-4
04/14/2023
SB-5 SB-6
04/14/2023 04/14/2023
L1606417-06L1606417-04 L1606417-05
Page 3 of 6
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
TPH-DRO 68334-30-5 3511/8015 mg/l NE NE NE 1 10 NE
Date Collected
Lab Sample ID
Client Sample ID
ISOPROPYLBENZENE 98-82-8 8260B mg/l NE 0.887 3.73 NE NE NE
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/l NE NE NE NE NE NE
2-BUTANONE (MEK)78-93-3 8260B mg/l NE 2240 9410 NE NE NE
METHYLENE CHLORIDE 75-09-2 8260B mg/l 0.005 0.763 9.23 NE NE 0.005
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/l NE 555 2330 NE NE NE
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/l NE 0.45 1.97 0.2 0.2 NE
NAPHTHALENE 91-20-3 8260B mg/l NE 0.00459 0.0201 0.7 0.7 NE
N-PROPYLBENZENE 103-65-1 8260B mg/l NE 2.43 10.2 NE NE NE
STYRENE 100-42-5 8260B mg/l 0.1 9.28 39 NE NE 0.1
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/l NE 0.00371 0.0162 NE NE NE
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/l NE 0.00323 0.0141 NE NE NE
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/l NE 0.242 1.02 NE NE NE
TETRACHLOROETHENE 127-18-4 8260B mg/l 0.005 0.0149 0.0652 NE NE 0.005
TOLUENE 108-88-3 8260B mg/l 1 19.2 80.7 1 3 1
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/l NE NE NE NE NE NE
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/l 0.07 0.0359 0.151 NE NE 0.07
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/l 0.2 7.42 31.1 NE NE 0.2
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/l 0.005 0.00521 0.0228 NE NE 0.005
TRICHLOROETHENE 79-01-6 8260B mg/l 0.005 0.00119 0.00743 NE NE 0.005
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/l NE NE NE NE NE NE
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/l NE 0.0223 0.0937 NE NE NE
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/l NE 0.248 1.04 NE NE NE
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/l NE 0.351 1.47 NE NE NE
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/l NE 0.175 0.733 NE NE NE
VINYL CHLORIDE 75-01-4 8260B mg/l 0.002 0.000147 0.00245 NE NE 0.002
XYLENES, TOTAL 1330-20-7 8260B mg/l 10 0.385 1.62 10 10 10
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE NE NE NE
J: The identification of the analyte is acceptable; the reported value is an estimate.
J6: The sample matrix interfered with the ability to make any accurate determination; spike value is low.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds Method Detection Limit (MDL). Color shaded value exceeds screening level.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2022.
Qualifiers (Q):
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2022).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (Novemver 2022).
UDEQ: Utah Department of Environmental Quality's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for
petroleum hydrocarbons in groundwater at underground storage tank sites.
UGWQS:Utah Ground Water Quality Standards.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
SB-4
04/14/2023
SB-5 SB-6
04/14/2023 04/14/2023
L1606417-06L1606417-04 L1606417-05
<0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 0.00119 0.01 <0.0100 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 0.000101 0.001 <0.00100 0.000101 0.001
<0.00500 0.001 0.005 <0.00500 0.001 0.005 <0.00500 0.001 0.005
<0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000147 0.001 <0.00100 0.000147 0.001 <0.00100 0.000147 0.001
<0.00100 0.000133 0.001 <0.00100 0.000133 0.001 <0.00100 0.000133 0.001
<0.00100 0.00018 0.001 <0.00100 0.00018 0.001 <0.00100 0.00018 0.001
<0.00100 0.0003 0.001 <0.00100 0.0003 0.001 <0.00100 0.0003 0.001
<0.00100 0.000278 0.001 <0.00100 0.000278 0.001 <0.00100 0.000278 0.001
<0.00100 0.00023 0.001 <0.00100 0.00023 0.001 <0.00100 0.00023 0.001
<0.00100 0.000481 0.001 <0.00100 0.000481 0.001 <0.00100 0.000481 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000158 0.001 <0.00100 0.000158 0.001 <0.00100 0.000158 0.001
<0.00100 0.00019 0.001 <0.00100 0.00019 0.001 <0.00100 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.003 <0.00250 0.000237 0.0025 <0.00250 0.000237 0.003
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003 <0.00300 0.000174 0.003
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05 <0.0500 0.000575 0.05
Page 4 of 6
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
TPH-DRO 68334-30-5 3511/8015 mg/l NE NE NE 1 10 NE
TPH-GRO 8006-61-9 8260B mg/l NE NE NE 1 10 NE
ACETONE 67-64-1 8260B mg/l NE 22500 94500 NE NE NE
ACROLEIN 107-02-8 8260B mg/l NE 0.00418 0.0176 NE NE NE
ACRYLONITRILE 107-13-1 8260B mg/l NE 0.00732 0.032 NE NE NE
BENZENE 71-43-2 8260B mg/l 0.005 0.00159 0.00693 0.005 0.3 0.005
BROMOBENZENE 108-86-1 8260B mg/l NE 0.62 2.6 NE NE NE
BROMODICHLOROMETHANE 75-27-4 8260B mg/l 0.08 0.000876 0.00382 NE NE NE
BROMOFORM 75-25-2 8260B mg/l 0.08 0.117 0.51 NE NE NE
BROMOMETHANE 74-83-9 8260B mg/l NE 0.0174 0.073 NE NE NE
N-BUTYLBENZENE 104-51-8 8260B mg/l NE NE NE NE NE NE
SEC-BUTYLBENZENE 135-98-8 8260B mg/l NE NE NE NE NE NE
TERT-BUTYLBENZENE 98-06-6 8260B mg/l NE NE NE NE NE NE
CARBON TETRACHLORIDE 56-23-5 8260B mg/l 0.005 0.000415 0.00181 NE NE 0.005
CHLOROBENZENE 108-90-7 8260B mg/l 0.1 0.41 1.72 NE NE 0.1
CHLORODIBROMOMETHANE 124-48-1 8260B mg/l 0.08 NE NE NE NE NE
CHLOROETHANE 75-00-3 8260B mg/l NE 23 96.5 NE NE NE
CHLOROFORM 67-66-3 8260B mg/l 0.08 0.000814 0.00355 NE NE NE
CHLOROMETHANE 74-87-3 8260B mg/l NE 0.26 1.09 NE NE NE
2-CHLOROTOLUENE 95-49-8 8260B mg/l NE NE NE NE NE NE
4-CHLOROTOLUENE 106-43-4 8260B mg/l NE NE NE NE NE NE
1,2-DIBROMO-3-CHLOROPROPANE 96-12-8 8260B mg/l 0.0002 0.0000281 0.00034 NE NE 0.0002
1,2-DIBROMOETHANE 106-93-4 8260B mg/l 5E-05 0.000176 0.000769 NE NE 0.00005
DIBROMOMETHANE 74-95-3 8260B mg/l NE 0.124 0.521 NE NE NE
1,2-DICHLOROBENZENE 95-50-1 8260B mg/l 0.6 2.66 11.2 NE NE 0.6
1,3-DICHLOROBENZENE 541-73-1 8260B mg/l NE NE NE NE NE NE
1,4-DICHLOROBENZENE 106-46-7 8260B mg/l 0.075 0.00259 0.0113 NE NE 0.075
DICHLORODIFLUOROMETHANE 75-71-8 8260B mg/l NE 0.00744 0.0312 NE NE NE
1,1-DICHLOROETHANE 75-34-3 8260B mg/l NE 0.00764 0.0334 NE NE NE
1,2-DICHLOROETHANE 107-06-2 8260B mg/l 0.005 0.00224 0.00978 NE NE 0.005
1,1-DICHLOROETHENE 75-35-4 8260B mg/l 0.007 0.195 0.821 NE NE 0.007
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/l 0.07 NE NE NE NE 0.07
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/l 0.1 0.109 0.457 NE NE 0.1
1,2-DICHLOROPROPANE 78-87-5 8260B mg/l 0.005 0.00658 0.0287 NE NE 0.005
1,1-DICHLOROPROPENE 563-58-6 8260B mg/l NE NE NE NE NE NE
1,3-DICHLOROPROPANE 142-28-9 8260B mg/l NE NE NE NE NE NE
CIS-1,3-DICHLOROPROPENE 10061-01-5 8260B mg/l NE NE NE NE NE NE
TRANS-1,3-DICHLOROPROPENE 10061-02-6 8260B mg/l NE NE NE NE NE NE
2,2-DICHLOROPROPANE 594-20-7 8260B mg/l NE NE NE NE NE NE
DI-ISOPROPYL ETHER 108-20-3 8260B mg/l NE 6.97 29.3 NE NE NE
ETHYLBENZENE 100-41-4 8260B mg/l 0.7 0.00349 0.0152 0.7 4 0.7
HEXACHLORO-1,3-BUTADIENE 87-68-3 8260B mg/l NE 0.000303 0.00132 NE NE NE
Date Collected
Lab Sample ID
Client Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
<0.100 0.0247 0.1 0.0528 J 0.0247 0.1 0.0373 J 0.0247 0.1
<0.500 0.108 0.5 <0.500 0.108 0.5 <0.500 0.108 0.5
<0.0500 0.0113 0.05 <0.0500 0.0113 0.05 <0.0500 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 0.00254 0.05 <0.0500 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 0.000671 0.01 <0.0100 0.000671 0.01
<0.00100 0.0000941 0.001 0.000135 J 0.0000941 0.001 <0.00100 0.0000941 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000136 0.001 <0.00100 0.000136 0.001 <0.00100 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 0.000605 0.005 <0.00500 0.000605 0.005
<0.00100 0.000157 0.001 <0.00100 0.000157 0.001 <0.00100 0.000157 0.001
<0.00100 0.000125 0.001 <0.00100 0.000125 0.001 <0.00100 0.000125 0.001
<0.00100 0.000127 0.001 <0.00100 0.000127 0.001 <0.00100 0.000127 0.001
<0.00100 0.000128 0.001 <0.00100 0.000128 0.001 <0.00100 0.000128 0.001
<0.00100 0.000116 0.001 <0.00100 0.000116 0.001 <0.00100 0.000116 0.001
<0.00100 0.00014 0.001 <0.00100 0.00014 0.001 <0.00100 0.00014 0.001
<0.00500 0.000192 0.005 <0.00500 0.000192 0.005 <0.00500 0.000192 0.005
0.00266 J 0.000111 0.005 <0.00500 0.000111 0.005 <0.00500 0.000111 0.005
<0.00250 0.00096 0.0025 <0.00250 0.00096 0.0025 <0.00250 0.00096 0.0025
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000122 0.001 <0.00100 0.000122 0.001 <0.00100 0.000122 0.001
<0.00100 0.000107 0.001 <0.00100 0.000107 0.001 <0.00100 0.000107 0.001
<0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.00500 0.000374 0.005 <0.00500 0.000374 0.005 <0.00500 0.000374 0.005
<0.00100 0.0001 0.001 <0.00100 0.0001 0.001 <0.00100 0.0001 0.001
<0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001 <0.00100 0.0000819 0.001
<0.00100 0.000188 0.001 <0.00100 0.000188 0.001 <0.00100 0.000188 0.001
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000142 0.001 <0.00100 0.000142 0.001 <0.00100 0.000142 0.001
<0.00100 0.00011 0.001 <0.00100 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.000111 0.001 <0.00100 0.000111 0.001 <0.00100 0.000111 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000161 0.001 <0.00100 0.000161 0.001 <0.00100 0.000161 0.001
<0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.000137 0.001 <0.00100 0.000137 0.001 <0.00100 0.000137 0.001
<0.00100 0.000337 0.001 <0.00100 0.000337 0.001 <0.00100 0.000337 0.001
04/14/2023 04/14/2023
SB-7 SB-8 SB-108
04/14/2023
L1606417-07 L1606417-08 L1606417-10
Page 5 of 6
Table C5 - VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
TPH-DRO 68334-30-5 3511/8015 mg/l NE NE NE 1 10 NE
Date Collected
Lab Sample ID
Client Sample ID
ISOPROPYLBENZENE 98-82-8 8260B mg/l NE 0.887 3.73 NE NE NE
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/l NE NE NE NE NE NE
2-BUTANONE (MEK)78-93-3 8260B mg/l NE 2240 9410 NE NE NE
METHYLENE CHLORIDE 75-09-2 8260B mg/l 0.005 0.763 9.23 NE NE 0.005
4-METHYL-2-PENTANONE (MIBK)108-10-1 8260B mg/l NE 555 2330 NE NE NE
METHYL TERT-BUTYL ETHER 1634-04-4 8260B mg/l NE 0.45 1.97 0.2 0.2 NE
NAPHTHALENE 91-20-3 8260B mg/l NE 0.00459 0.0201 0.7 0.7 NE
N-PROPYLBENZENE 103-65-1 8260B mg/l NE 2.43 10.2 NE NE NE
STYRENE 100-42-5 8260B mg/l 0.1 9.28 39 NE NE 0.1
1,1,1,2-TETRACHLOROETHANE 630-20-6 8260B mg/l NE 0.00371 0.0162 NE NE NE
1,1,2,2-TETRACHLOROETHANE 79-34-5 8260B mg/l NE 0.00323 0.0141 NE NE NE
1,1,2-TRICHLOROTRIFLUOROETHANE76-13-1 8260B mg/l NE 0.242 1.02 NE NE NE
TETRACHLOROETHENE 127-18-4 8260B mg/l 0.005 0.0149 0.0652 NE NE 0.005
TOLUENE 108-88-3 8260B mg/l 1 19.2 80.7 1 3 1
1,2,3-TRICHLOROBENZENE 87-61-6 8260B mg/l NE NE NE NE NE NE
1,2,4-TRICHLOROBENZENE 120-82-1 8260B mg/l 0.07 0.0359 0.151 NE NE 0.07
1,1,1-TRICHLOROETHANE 71-55-6 8260B mg/l 0.2 7.42 31.1 NE NE 0.2
1,1,2-TRICHLOROETHANE 79-00-5 8260B mg/l 0.005 0.00521 0.0228 NE NE 0.005
TRICHLOROETHENE 79-01-6 8260B mg/l 0.005 0.00119 0.00743 NE NE 0.005
TRICHLOROFLUOROMETHANE 75-69-4 8260B mg/l NE NE NE NE NE NE
1,2,3-TRICHLOROPROPANE 96-18-4 8260B mg/l NE 0.0223 0.0937 NE NE NE
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/l NE 0.248 1.04 NE NE NE
1,2,3-TRIMETHYLBENZENE 526-73-8 8260B mg/l NE 0.351 1.47 NE NE NE
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/l NE 0.175 0.733 NE NE NE
VINYL CHLORIDE 75-01-4 8260B mg/l 0.002 0.000147 0.00245 NE NE 0.002
XYLENES, TOTAL 1330-20-7 8260B mg/l 10 0.385 1.62 10 10 10
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE NE NE NE
J: The identification of the analyte is acceptable; the reported value is an estimate.
J6: The sample matrix interfered with the ability to make any accurate determination; spike value is low.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds Method Detection Limit (MDL). Color shaded value exceeds screening level.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2022.
Qualifiers (Q):
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2022).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (Novemver 2022).
UDEQ: Utah Department of Environmental Quality's Initial Screening Levels (ISLs) and risk-based Tier 1 Screening Levels (Tier 1) for
petroleum hydrocarbons in groundwater at underground storage tank sites.
UGWQS:Utah Ground Water Quality Standards.
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
04/14/2023 04/14/2023
SB-7 SB-8 SB-108
04/14/2023
L1606417-07 L1606417-08 L1606417-10
<0.00100 0.000105 0.001 <0.00100 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 0.00119 0.01 <0.0100 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 0.000101 0.001 <0.00100 0.000101 0.001
<0.00500 0.001 0.005 <0.00500 0.001 0.005 <0.00500 0.001 0.005
<0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001 <0.00100 0.0000993 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001 <0.00100 0.000118 0.001
<0.00100 0.000147 0.001 <0.00100 0.000147 0.001 <0.00100 0.000147 0.001
<0.00100 0.000133 0.001 <0.00100 0.000133 0.001 <0.00100 0.000133 0.001
<0.00100 0.00018 0.001 <0.00100 0.00018 0.001 <0.00100 0.00018 0.001
<0.00100 0.0003 0.001 <0.00100 0.0003 0.001 <0.00100 0.0003 0.001
<0.00100 0.000278 0.001 <0.00100 0.000278 0.001 <0.00100 0.000278 0.001
<0.00100 0.00023 0.001 <0.00100 0.00023 0.001 <0.00100 0.00023 0.001
<0.00100 0.000481 0.001 <0.00100 0.000481 0.001 <0.00100 0.000481 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
<0.00100 0.000158 0.001 <0.00100 0.000158 0.001 <0.00100 0.000158 0.001
<0.00100 0.00019 0.001 <0.00100 0.00019 0.001 <0.00100 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.0025 <0.00250 0.000237 0.0025 <0.00250 0.000237 0.0025
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003 <0.00300 0.000174 0.003
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05 <0.0500 0.000575 0.05
Page 6 of 6
Table C6 - Polycyclic Aromatic Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197496 Task 3.28
Method Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/l NE NE NE <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/l NE NE NE <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/l NE NE NE <0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/l NE NE NE <0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/l 0.0002 NE NE <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/l NE NE NE <0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/l NE NE NE <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/l NE NE NE <0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/l NE NE NE <0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/l NE NE NE <0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/l NE NE NE <0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/l NE NE NE <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/l NE NE NE <0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/l NE 0.00459 0.0201 <0.000250 0.0000917 0.00025 <0.000250 0.0000917 0.00025 <0.000250 0.0000917 0.00025
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/l NE NE NE <0.0000500 0.000018 0.00005 <0.0000500 0.000018 0.00005 <0.0000500 0.000018 0.00005
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/l NE NE NE <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/l NE NE NE <0.000250 0.0000687 0.00025 <0.000250 0.0000687 0.00025 <0.000250 0.0000687 0.00025
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/l NE NE NE <0.000250 0.0000674 0.00025 <0.000250 0.0000674 0.00025 <0.000250 0.0000674 0.00025
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/l NE NE NE <0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J4: The associated batch QC was outside the established quality control range for accuracy
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2022).
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds laboratory RDL.
SB-3
04/14/2023 04/14/2023 04/14/2023
Client Sample ID
Date Collected
Lab Sample ID L1606417-01 L1606417-02 L1606417-03
SB-1 SB-2
Page 1 of 3
Table C6 - Polycyclic Aromatic Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197496 Task 3.28
Method Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/l NE NE NE
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/l NE NE NE
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/l 0.0002 NE NE
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/l NE NE NE
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/l NE NE NE
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/l NE NE NE
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/l NE NE NE
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/l NE NE NE
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/l NE NE NE
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/l NE 0.00459 0.0201
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/l NE NE NE
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/l NE NE NE
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/l NE NE NE
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/l NE NE NE
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/l NE NE NE
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J4: The associated batch QC was outside the established quality control range for accuracy
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2022).
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds laboratory RDL.
Client Sample ID
Date Collected
Lab Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
<0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
<0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
<0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005
<0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005
<0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005
<0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005
<0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005
<0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005
<0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005
<0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005
<0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001
<0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
<0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005
<0.000250 0.0000917 0.00025 <0.000250 0.0000917 0.00025 <0.000250 0.0000917 0.00025
0.0000782 0.000018 0.00005 <0.0000500 0.000018 0.00005 0.000106 0.000018 0.00005
<0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
<0.000250 0.0000687 0.00025 <0.000250 0.0000687 0.00025 <0.000250 0.0000687 0.00025
<0.000250 0.0000674 0.00025 <0.000250 0.0000674 0.00025 <0.000250 0.0000674 0.00025
<0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025
SB-4 SB-5 SB-6
04/14/2023 04/14/2023
L1606417-04 L1606417-05 L1606417-06
04/14/2023
Page 2 of 3
Table C6 - Polycyclic Aromatic Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197496 Task 3.28
Method Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial
8270C-SIM ANTHRACENE 120-12-7 8270C-SIM mg/l NE NE NE
8270C-SIM ACENAPHTHENE 83-32-9 8270C-SIM mg/l NE NE NE
8270C-SIM ACENAPHTHYLENE 208-96-8 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(A)ANTHRACENE 56-55-3 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(A)PYRENE 50-32-8 8270C-SIM mg/l 0.0002 NE NE
8270C-SIM BENZO(B)FLUORANTHENE 205-99-2 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(G,H,I)PERYLENE 191-24-2 8270C-SIM mg/l NE NE NE
8270C-SIM BENZO(K)FLUORANTHENE 207-08-9 8270C-SIM mg/l NE NE NE
8270C-SIM CHRYSENE 218-01-9 8270C-SIM mg/l NE NE NE
8270C-SIM DIBENZ(A,H)ANTHRACENE 53-70-3 8270C-SIM mg/l NE NE NE
8270C-SIM FLUORANTHENE 206-44-0 8270C-SIM mg/l NE NE NE
8270C-SIM FLUORENE 86-73-7 8270C-SIM mg/l NE NE NE
8270C-SIM INDENO(1,2,3-CD)PYRENE 193-39-5 8270C-SIM mg/l NE NE NE
8270C-SIM NAPHTHALENE 91-20-3 8270C-SIM mg/l NE 0.00459 0.0201
8270C-SIM PHENANTHRENE 85-01-8 8270C-SIM mg/l NE NE NE
8270C-SIM PYRENE 129-00-0 8270C-SIM mg/l NE NE NE
8270C-SIM 1-METHYLNAPHTHALENE 90-12-0 8270C-SIM mg/l NE NE NE
8270C-SIM 2-METHYLNAPHTHALENE 91-57-6 8270C-SIM mg/l NE NE NE
8270C-SIM 2-CHLORONAPHTHALENE 91-58-7 8270C-SIM mg/l NE NE NE
Qualifiers (Q)
J:The identification of the analyte is acceptable; the reported value is an estimate.
J4: The associated batch QC was outside the established quality control range for accuracy
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2022).
NE:Not Established.<:Less than Reported Detection Limit (RDL).mg/l:Milligrams per liter.
Bold value exceeds laboratory RDL.
Client Sample ID
Date Collected
Lab Sample ID
Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
<0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
<0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005 <0.0000500 0.000019 0.00005
<0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005 <0.0000500 0.0000171 0.00005
<0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005 <0.0000500 0.0000203 0.00005
<0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 J4 0.0000184 0.00005
<0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005 <0.0000500 0.0000168 0.00005
<0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005 <0.0000500 0.0000184 0.00005
<0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005 <0.0000500 0.0000202 0.00005
<0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005 <0.0000500 0.0000179 0.00005
<0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005 <0.0000500 0.000016 0.00005
<0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001 <0.000100 0.000027 0.0001
<0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
<0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005 <0.0000500 0.0000158 0.00005
<0.000250 0.0000917 0.00025 0.000116 J 0.0000917 0.00025 0.000195 J 0.0000917 0.00025
<0.0000500 0.000018 0.00005 <0.0000500 0.000018 0.00005 <0.0000500 0.000018 0.00005
<0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005 <0.0000500 0.0000169 0.00005
<0.000250 0.0000687 0.00025 0.00013 J 0.0000687 0.00025 0.000234 J 0.0000687 0.00025
<0.000250 0.0000674 0.00025 0.000168 J 0.0000674 0.00025 0.000342 0.0000674 0.00025
<0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025 <0.000250 0.0000682 0.00025
04/14/2023 04/14/2023
SB-7 SB-8 SB-108
L1606417-10L1606417-07 L1606417-08
04/14/2023
Page 3 of 3
Table C7 - VOCs in Soil Gas
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units VISL
Residential
VISL
Commercial Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
ACETONE 67-64-1 TO-15 µg/m3 1070000 4510000 15.4 2.97 1.39 8.15 2.97 1.39 11.9 2.97 1.39 24.2 2.97 1.39
ALLYL CHLORIDE 107-05-1 TO-15 µg/m3 15.6 68.1 <0.626 0.63 0.36 <0.626 0.63 0.357 <0.626 0.626 0.36 <0.626 0.626 0.36
BENZENE 71-43-2 TO-15 µg/m3 12 52.4 1.32 0.64 0.23 5.46 0.64 0.228 1.6 0.639 0.23 1.62 0.639 0.23
BENZYL CHLORIDE 100-44-7 TO-15 µg/m3 1.91 8.34 <1.04 1.04 0.31 <1.04 1.04 0.311 <1.04 1.04 0.31 <1.04 1.04 0.31
BROMODICHLOROMETHANE 75-27-4 TO-15 µg/m3 2.53 11 <1.34 1.34 0.47 <1.34 1.34 0.471 <1.34 1.34 0.47 <1.34 1.34 0.47
BROMOFORM 75-25-2 TO-15 µg/m3 85.1 372 <6.21 6.21 0.76 <6.21 6.21 0.757 <6.21 6.21 0.76 <6.21 6.21 0.76
BROMOMETHANE 74-83-9 TO-15 µg/m3 174 730 <0.776 0.78 0.38 <0.776 0.78 0.381 <0.776 0.776 0.38 <0.776 0.776 0.38
1,3-BUTADIENE 106-99-0 TO-15 µg/m3 3.12 13.6 <4.43 4.43 0.23 <4.43 4.43 0.23 <4.43 4.43 0.23 <4.43 4.43 0.23
CARBON DISULFIDE 75-15-0 TO-15 µg/m3 24300 102000 <0.622 0.62 0.32 1.26 0.62 0.317 <0.622 0.622 0.32 <0.622 0.622 0.32
CARBON TETRACHLORIDE 56-23-5 TO-15 µg/m3 15.6 68.1 <1.26 1.26 0.46 <1.26 1.26 0.461 <1.26 1.26 0.46 <1.26 1.26 0.46
CHLOROBENZENE 108-90-7 TO-15 µg/m3 1740 7300 <0.924 0.92 0.39 <0.924 0.92 0.385 <0.924 0.924 0.39 <0.924 0.924 0.39
CHLOROETHANE 75-00-3 TO-15 µg/m3 348000 1460000 <0.528 0.53 0.26 <0.528 0.53 0.263 <0.528 0.528 0.26 <0.528 0.528 0.26
CHLOROFORM 67-66-3 TO-15 µg/m3 4.07 17.8 <0.973 0.97 0.35 <0.973 0.97 0.349 <0.973 0.973 0.35 <0.973 0.973 0.35
CHLOROMETHANE 74-87-3 TO-15 µg/m3 3130 13100 <0.413 0.41 0.21 <0.413 0.41 0.213 <0.413 0.413 0.21 <0.413 0.413 0.21
2-CHLOROTOLUENE 95-49-8 TO-15 µg/m3 NE NE <1.03 1.03 0.43 <1.03 1.03 0.427 <1.03 1.03 0.43 <1.03 1.03 0.43
CYCLOHEXANE 110-82-7 TO-15 µg/m3 209000 876000 <0.689 0.69 0.26 <0.689 0.69 0.259 <0.689 0.689 0.26 <0.689 0.689 0.26
CHLORODIBROMOMETHANE 124-48-1 TO-15 µg/m3 NE NE <1.70 1.7 0.62 <1.70 1.7 0.618 <1.70 1.7 0.62 <1.70 1.7 0.62
1,2-DIBROMOETHANE 106-93-4 TO-15 µg/m3 0.156 0.681 <1.54 1.54 0.55 <1.54 1.54 0.554 <1.54 1.54 0.55 <1.54 1.54 0.55
1,2-DICHLOROBENZENE 95-50-1 TO-15 µg/m3 6950 29200 <1.20 1.2 0.77 <1.20 1.2 0.77 <1.20 1.2 0.77 <1.20 1.2 0.77
1,3-DICHLOROBENZENE 541-73-1 TO-15 µg/m3 NE NE <1.20 1.2 1.09 <1.20 1.2 1.09 <1.20 1.2 1.09 <1.20 1.2 1.09
1,4-DICHLOROBENZENE 106-46-7 TO-15 µg/m3 8.51 37.2 <1.20 1.2 0.34 <1.20 1.2 0.335 <1.20 1.2 0.34 <1.20 1.2 0.34
1,2-DICHLOROETHANE 107-06-2 TO-15 µg/m3 3.6 15.7 <0.810 0.81 0.28 <0.810 0.81 0.283 <0.810 0.81 0.28 <0.810 0.81 0.28
1,1-DICHLOROETHANE 75-34-3 TO-15 µg/m3 58.5 256 <0.802 0.8 0.29 <0.802 0.8 0.29 <0.802 0.802 0.29 <0.802 0.802 0.29
1,1-DICHLOROETHENE 75-35-4 TO-15 µg/m3 6950 29200 <0.793 0.79 0.3 <0.793 0.79 0.302 <0.793 0.793 0.3 <0.793 0.793 0.3
CIS-1,2-DICHLOROETHENE 156-59-2 TO-15 µg/m3 NE NE <0.793 0.79 0.31 <0.793 0.79 0.311 0.975 0.793 0.31 <0.793 0.793 0.31
TRANS-1,2-DICHLOROETHENE 156-60-5 TO-15 µg/m3 NE NE <0.793 0.79 0.27 <0.793 0.79 0.267 <0.793 0.793 0.27 <0.793 0.793 0.27
1,2-DICHLOROPROPANE 78-87-5 TO-15 µg/m3 25.3 110 <0.924 0.92 0.35 <0.924 0.92 0.351 <0.924 0.924 0.35 <0.924 0.924 0.35
CIS-1,3-DICHLOROPROPENE 10061-01-5 TO-15 µg/m3 NE NE <0.908 0.91 0.31 <0.908 0.91 0.313 <0.908 0.908 0.31 <0.908 0.908 0.31
TRANS-1,3-DICHLOROPROPENE 10061-02-6 TO-15 µg/m3 NE NE <0.908 0.91 0.33 <0.908 0.91 0.331 <0.908 0.908 0.33 <0.908 0.908 0.33
1,4-DIOXANE 123-91-1 TO-15 µg/m3 18.7 81.8 <0.721 0.72 0.3 <0.721 0.72 0.3 <0.721 0.721 0.3 <0.721 0.721 0.3
ETHANOL 64-17-5 TO-15 µg/m3 NE NE 19.4 4.71 0.5 46.2 4.71 0.5 91.6 4.71 0.5 130 4.71 0.5
ETHYLBENZENE 100-41-4 TO-15 µg/m3 37.4 164 1.95 0.87 0.36 1.57 0.87 0.362 3.22 0.867 0.36 19.8 0.867 0.36
4-ETHYLTOLUENE 622-96-8 TO-15 µg/m3 NE NE <0.982 0.98 0.38 <0.982 0.98 0.384 <0.982 0.982 0.38 <0.982 0.982 0.38
TRICHLOROFLUOROMETHANE 75-69-4 TO-15 µg/m3 NE NE 5.52 1.12 0.46 17.6 1.12 0.46 1.58 1.12 0.46 1.62 1.12 0.46
04/19/2023 04/19/2023 04/17/2023
SS-1 SS-2
L1607510-01 L1607510-02 L1607510-03 L1607510-04
Client Sample ID
Lab Sample ID
SV-2
Date Collected
SV-1
04/17/2023
Page 1 of 2
Table C7 - VOCs in Soil Gas
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte CAS Method Units VISL
Residential
VISL
Commercial Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL Result Q MDL RDL
04/19/2023 04/19/2023 04/17/2023
SS-1 SS-2
L1607510-01 L1607510-02 L1607510-03 L1607510-04
Client Sample ID
Lab Sample ID
SV-2
Date Collected
SV-1
04/17/2023
DICHLORODIFLUOROMETHANE 75-71-8 TO-15 µg/m3 3480 14600 4.06 0.99 0.68 10.1 0.99 0.678 2.24 0.989 0.68 2.11 0.989 0.68
1,1,2-TRICHLOROTRIFLUOROETHANE 76-13-1 TO-15 µg/m3 174000 730000 3.03 1.53 0.61 16.8 1.53 0.608 <1.53 1.53 0.61 <1.53 1.53 0.61
1,2-DICHLOROTETRAFLUOROETHANE76-14-2 TO-15 µg/m3 NE NE <1.40 1.4 0.62 <1.40 1.4 0.622 <1.40 1.4 0.62 <1.40 1.4 0.62
HEPTANE 142-82-5 TO-15 µg/m3 13900 58400 1.4 0.82 0.43 8.83 0.82 0.425 1.71 0.818 0.43 1.93 0.818 0.43
HEXACHLORO-1,3-BUTADIENE 87-68-3 TO-15 µg/m3 4.25 18.6 <6.73 6.73 1.12 <6.73 6.73 1.12 <6.73 6.73 1.12 <6.73 6.73 1.12
N-HEXANE 110-54-3 TO-15 µg/m3 24300 102000 7.16 2.22 0.73 4.12 2.22 0.726 3.17 2.22 0.73 3.81 2.22 0.73
ISOPROPYLBENZENE 98-82-8 TO-15 µg/m3 13900 58400 <0.983 0.98 0.38 <0.983 0.98 0.382 <0.983 0.983 0.38 <0.983 0.983 0.38
METHYLENE CHLORIDE 75-09-2 TO-15 µg/m3 3380 40900 <0.694 0.69 0.34 1.26 0.69 0.34 2.15 0.694 0.34 <0.694 0.694 0.34
METHYL BUTYL KETONE 591-78-6 TO-15 µg/m3 1040 4380 <5.11 5.11 0.54 <5.11 5.11 0.544 <5.11 5.11 0.54 <5.11 5.11 0.54
2-BUTANONE (MEK)78-93-3 TO-15 µg/m3 174000 730000 4.48 3.69 0.24 <3.69 3.69 0.24 <3.69 3.69 0.24 3.92 3.69 0.24
4-METHYL-2-PENTANONE (MIBK)108-10-1 TO-15 µg/m3 104000 438000 <5.12 5.12 0.31 <5.12 5.12 0.313 <5.12 5.12 0.31 <5.12 5.12 0.31
METHYL METHACRYLATE 80-62-6 TO-15 µg/m3 24300 102000 <0.819 0.82 0.36 <0.819 0.82 0.359 <0.819 0.819 0.36 <0.819 0.819 0.36
METHYL TERT-BUTYL ETHER 1634-04-4 TO-15 µg/m3 360 1570 <0.721 0.72 0.23 <0.721 0.72 0.233 <0.721 0.721 0.23 <0.721 0.721 0.23
NAPHTHALENE 91-20-3 TO-15 µg/m3 2.75 12 <3.30 3.3 1.83 <3.30 3.3 1.83 <3.30 3.3 1.83 <3.30 3.3 1.83
2-PROPANOL 67-63-0 TO-15 µg/m3 6950 29200 104 3.07 0.65 15.8 3.07 0.649 10.7 3.07 0.65 90 3.07 0.65
PROPENE 115-07-1 TO-15 µg/m3 104000 438000 <2.15 2.15 0.16 <2.15 2.15 0.16 <2.15 2.15 0.16 <2.15 2.15 0.16
STYRENE 100-42-5 TO-15 µg/m3 34800 146000 <0.851 0.85 0.34 <0.851 0.85 0.335 <0.851 0.851 0.34 <0.851 0.851 0.34
1,1,2,2-TETRACHLOROETHANE 79-34-5 TO-15 µg/m3 1.61 7.05 <1.37 1.37 0.51 <1.37 1.37 0.511 <1.37 1.37 0.51 <1.37 1.37 0.51
TETRACHLOROETHENE 127-18-4 TO-15 µg/m3 360 1570 6.47 1.36 0.55 17.9 1.36 0.553 <1.36 1.36 0.55 <1.36 1.36 0.55
TETRAHYDROFURAN 109-99-9 TO-15 µg/m3 69500 292000 <0.590 0.59 0.22 <0.590 0.59 0.216 <0.590 0.59 0.22 <0.590 0.59 0.22
TOLUENE 108-88-3 TO-15 µg/m3 174000 730000 7.95 1.88 0.33 9.53 1.88 0.328 12.9 1.88 0.33 10.3 1.88 0.33
1,2,4-TRICHLOROBENZENE 120-82-1 TO-15 µg/m3 69.5 292 <4.66 4.66 1.1 <4.66 4.66 1.1 <4.66 4.66 1.1 <4.66 4.66 1.1
1,1,1-TRICHLOROETHANE 71-55-6 TO-15 µg/m3 174000 730000 <1.09 1.09 0.4 <1.09 1.09 0.4 <1.09 1.09 0.4 <1.09 1.09 0.4
1,1,2-TRICHLOROETHANE 79-00-5 TO-15 µg/m3 5.85 25.6 <1.09 1.09 0.42 <1.09 1.09 0.422 <1.09 1.09 0.42 <1.09 1.09 0.42
TRICHLOROETHENE 79-01-6 TO-15 µg/m3 15.9 99.7 <1.07 1.07 0.36 <1.07 1.07 0.364 <1.07 1.07 0.36 <1.07 1.07 0.36
1,2,4-TRIMETHYLBENZENE 95-63-6 TO-15 µg/m3 2090 8760 2.44 0.98 0.38 1.28 0.98 0.375 1.8 0.982 0.38 2.13 0.982 0.38
1,3,5-TRIMETHYLBENZENE 108-67-8 TO-15 µg/m3 2090 8760 <0.982 0.98 0.38 <0.982 0.98 0.382 <0.982 0.982 0.38 <0.982 0.982 0.38
2,2,4-TRIMETHYLPENTANE 540-84-1 TO-15 µg/m3 NE NE <0.934 0.93 0.62 4.39 0.93 0.621 12.6 0.934 0.62 7.89 0.934 0.62
VINYL CHLORIDE 75-01-4 TO-15 µg/m3 5.59 92.9 <0.511 0.51 0.24 <0.511 0.51 0.243 <0.511 0.511 0.24 <0.511 0.511 0.24
VINYL BROMIDE 593-60-2 TO-15 µg/m3 2.92 12.8 <0.875 0.88 0.37 <0.875 0.88 0.373 <0.875 0.875 0.37 <0.875 0.875 0.37
VINYL ACETATE 108-05-4 TO-15 µg/m3 6950 29200 <0.704 0.7 0.41 <0.704 0.7 0.408 <0.704 0.704 0.41 <0.704 0.704 0.41
XYLENES, TOTAL 1330-20-7 TO-15 µg/m3 3480 14600 11.4 2.61 0.59 6.64 2.61 0.586 17.5 2.61 0.59 148 2.61 0.59
M&P-XYLENE 1330-20-7 TO-15 µg/m3 3480 14600 8.45 1.73 0.59 5.07 1.73 0.585 13.3 1.73 0.59 105 1.73 0.59
O-XYLENE 95-47-6 TO-15 µg/m3 3480 14600 2.92 0.87 0.36 1.57 0.87 0.359 4.19 0.867 0.36 42.7 0.867 0.36
B: The same analyte is found in the associated blank.
NE:Not Established.<:Less than Reported Detection Limit (RDL).µg/m3:micrograms per cubinc meter.ppmv: parts per million volume.
Blue italicized non-detect results (e.g.,<0.0100 ) exceed one or more of the screening levels.
Bold value exceeds Method Detection Limit (MDL).
Qualifiers (Q):
EPA VISL: Environmental Protection Agency Target Sub-Slab and Near-source Soil Gas.
Page 2 of 2
Table C6.1 - Duplicate Pair–Metals in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 50%
for Soil?
ARSENIC 6010B mg/kg 6.49 2.32 RDL 1 6.16 2.35 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated. Field Duplicate pair
within control because the difference between the Original and Duplicate sample results
was less than 2 x RDL.
BARIUM 6010B mg/kg 93 0.58 RDL 1 95.4 0.588 RDL 1 Yes, RPD calculated 2.5% Yes
CADMIUM 6010B mg/kg 0.767 0.58 RDL 1 0.691 0.588 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated. Field Duplicate pair
within control because the difference between the Original and Duplicate sample results
was less than 2 x RDL.
CHROMIUM 6010B mg/kg 10.8 1.16 RDL 1 11 1.18 RDL 1 Yes, RPD calculated 1.8% Yes
LEAD 6010B mg/kg 195 0.58 RDL 1 108 0.588 RDL 1 Yes, RPD calculated 57.4% NO
MERCURY 7471A mg/kg 0.0421 J 0.0464 RDL 1 0.0322 J 0.047 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated. Field Duplicate pair
within control because the difference between the Original and Duplicate sample results
was less than 2 x RDL.
SELENIUM 6010B mg/kg ND 2.32 RDL 1 ND 2.35 RDL 1
No, Original and Duplicate both < RDL. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than 2 x RDL.
SILVER 6010B mg/kg ND 1.16 RDL 1 ND 1.18 RDL 1
No, Original and Duplicate both < RDL. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than 2 x RDL.
Qualifiers (Q):
J - The identification of the analyte is acceptable; the reported value is an estimate.
mg/kg: Milligrams per kilogram.
RDL - Laboratory reported detection limit.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 50% for solid samples.
For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than two times the RDL for solid samples.
Original Sample Duplicate Sample
Lab Sample ID L1606384-15 L1606384-17
Client Sample ID SB-8-2-3 SB-108-2-3
Date Collected 4/14/2023 4/14/2023
Page 1 of 1
Table C6.2 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte Method Units Result Q High
Limit
High
Limit
Type
Dilution
Factor Result Q High
Limit
High
Limit
Type
Dilutio
n
Factor
Results  5 x RDL?RPD
RPD Within
+/- 50%
for Soil?
TPH-GRO 8260B mg/kg 1.01 0.691 RDL 1 1.99 0.697 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
TPH-DRO 8015 mg/kg ND 5.53 RDL 1 2.09 J 5.58 RDL 1
No, Original results < RDL but Duplicate results < 5 x RDL.Field Duplicate
pair within control because the difference between the Original and duplicate
samples results (using 1/2 the RDL as a conservative estimate for ND) was
less than 2 x RDL.
ACETONE 8260B mg/kg ND 0.0691 RDL 1 0.177 0.0697 RDL 1
No, Original results < RDL but Duplicate results < 5 x RDL.Field Duplicate
pair not within control because the difference between the Original and
duplicate samples results (using 1/2 the RDL as a conservative estimate for
ND) was greater than 2 x RDL.
ACRYLONITRILE 8260B mg/kg ND 0.0138 RDL 1 ND J3 0.0139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
BENZENE 8260B mg/kg 0.105 0.00138 RDL 1 0.205 J3 V 0.00139 RDL 1 Yes, RPD calculated 64.5%NO
BROMOBENZENE 8260B mg/kg ND 0.00138 RDL 1 0.000835 J J3 0.00139 RDL 1
No, Original results < RDL but Duplicate results < 5 x RDL.Field Duplicate
pair within control because the difference between the Original and duplicate
samples results (using 1/2 the RDL as a conservative estimate for ND) was
less than 2 x RDL.
BROMODICHLOROMETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
BROMOFORM 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
BROMOMETHANE 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
N-BUTYLBENZENE 8260B mg/kg 0.000398 J 0.00138 RDL 1 0.000693 J J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
SEC-BUTYLBENZENE 8260B mg/kg 0.000344 J 0.00138 RDL 1 0.000747 J J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
TERT-BUTYLBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CARBON TETRACHLORIDE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
Original Sample Duplicate Sample
Client Sample ID SB-8-12-13 SB-108-12-13
Date Collected 4/14/2023 4/14/2023
Lab Sample ID L1606384-16 L1606384-18
Page 1 of 5
Table C6.2 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
CHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CHLORODIBROMOMETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CHLOROETHANE 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CHLOROFORM 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CHLOROMETHANE 8260B mg/kg ND 0.00346 RDL 1 ND J3 0.00349 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
2-CHLOROTOLUENE 8260B mg/kg ND 0.00138 RDL 1 0.00088 J J3 0.00139 RDL 1
No, Original results < RDL but Duplicate results < 5 x RDL.Field Duplicate
pair within control because the difference between the Original and duplicate
samples results (using 1/2 the RDL as a conservative estimate for ND) was
less than 2 x RDL.
4-CHLOROTOLUENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2-DIBROMO-3-CHLOROPROPANE 8260B mg/kg ND 0.00691 RDL 1 ND 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2-DIBROMOETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
DIBROMOMETHANE 8260B mg/kg ND 0.00138 RDL 1 ND 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2-DICHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,3-DICHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,4-DICHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
DICHLORODIFLUOROMETHANE 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1-DICHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2-DICHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1-DICHLOROETHENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
Page 2 of 5
Table C6.2 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
CIS-1,2-DICHLOROETHENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TRANS-1,2-DICHLOROETHENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2-DICHLOROPROPANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1-DICHLOROPROPENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,3-DICHLOROPROPANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
CIS-1,3-DICHLOROPROPENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TRANS-1,3-DICHLOROPROPENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
2,2-DICHLOROPROPANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
DI-ISOPROPYL ETHER 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
ETHYLBENZENE 8260B mg/kg 0.0235 0.00138 RDL 1 0.0496 J3 J6 0.00139 RDL 1 Yes, RPD calculated 71.4%NO
HEXACHLORO-1,3-BUTADIENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
ISOPROPYLBENZENE 8260B mg/kg 0.00246 0.00138 RDL 1 0.00453 J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair not within control because the difference between the Original
and Duplicate sample results was greater than 2 x RDL.
P-ISOPROPYLTOLUENE 8260B mg/kg 0.000373 J 0.00138 RDL 1 0.000934 J J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
2-BUTANONE (MEK)8260B mg/kg 0.0281 0.0138 RDL 1 0.0429 0.0139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
METHYLENE CHLORIDE 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
4-METHYL-2-PENTANONE (MIBK)8260B mg/kg ND 0.0138 RDL 1 ND J3 0.0139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
METHYL TERT-BUTYL ETHER 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
NAPHTHALENE 8260B mg/kg 0.0218 0.00691 RDL 1 0.027 J6 0.00697 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
Page 3 of 5
Table C6.2 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
N-PROPYLBENZENE 8260B mg/kg 0.0027 0.00138 RDL 1 0.00615 J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair not within control because the difference between the Original
and Duplicate sample results was greater than 2 x RDL.
STYRENE 8260B mg/kg ND 0.00138 RDL 1 ND J6 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1,1,2-TETRACHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1,2,2-TETRACHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1,2-TRICHLOROTRIFLUOROETHANE8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TETRACHLOROETHENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TOLUENE 8260B mg/kg 0.149 0.00691 RDL 1 ND 0.224 RDL 1
No, Original results < 5 x RDL but Duplicate results < RDL.Field Duplicate
pair within control because the difference between the Original and duplicate
samples results (using 1/2 the RDL as a conservative estimate for ND) was
less than 2 x RDL.
1,2,3-TRICHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2,4-TRICHLOROBENZENE 8260B mg/kg ND 0.00138 RDL 1 ND 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1,1-TRICHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,1,2-TRICHLOROETHANE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TRICHLOROETHENE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
TRICHLOROFLUOROMETHANE 8260B mg/kg ND 0.00691 RDL 1 ND J3 0.00697 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2,3-TRICHLOROPROPANE 8260B mg/kg ND 0.00346 RDL 1 ND J3 0.00349 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
1,2,4-TRIMETHYLBENZENE 8260B mg/kg 0.00852 0.00138 RDL 1 0.0149 J3 J6 0.00139 RDL 1 Yes, RPD calculated 54.5%NO
Page 4 of 5
Table C6.2 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
1,2,3-TRIMETHYLBENZENE 8260B mg/kg 0.00333 0.00138 RDL 1 0.00534 J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original and
Duplicate sample results was less than 2 x RDL.
1,3,5-TRIMETHYLBENZENE 8260B mg/kg 0.003 0.00138 RDL 1 0.00583 J3 0.00139 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair not within control because the difference between the Original
and Duplicate sample results was greater than 2 x RDL.
VINYL CHLORIDE 8260B mg/kg ND 0.00138 RDL 1 ND J3 0.00139 RDL 1
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
XYLENES, TOTAL 8260B mg/kg 0.056 0.00415 RDL 1 0.109 J3 J6 0.00418 RDL 1 Yes, RPD calculated 64.2%NO
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
J3: The associated batch QC was outside the established quality control range for precision.
J6: The sample matrix interfered with the ability to make any accurate determination; spike value is low.
mg/kg:Milligrams per kilogram.
RDL - Laboratory reported detection limit.
TPH-GRO - Total Petroleum Hydrocarbons Gasoline Range Organics.
TPH-DRO - Total Petroleum Hydrocarbons Diesel Range Organics.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 50% for solid samples.
For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than two times the RDL for solid samples.
Bold value exceeds Method Detection Limit (MDL). Color shaded value exceeds screening level.
Page 5 of 5
Table C6.3 - Duplicate Pair - Polycyclic Aromatic Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Tast 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 50%
for Soil?
ANTHRACENE 8270C-SIM mg/kg 0.166 0.00696 RDL 1 0.0415 J 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair within control because the difference between the
Original and Duplicate sample results was less than 2 x RDL.
ACENAPHTHENE 8270C-SIM mg/kg 0.182 0.00696 RDL 1 ND 0.06 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate pair not within control because the difference between the
Original and Duplicate sample results (using 1/2 RDL as conservative
estimate) was greater than 2 x RDL.
ACENAPHTHYLENE 8270C-SIM mg/kg 0.005 J 0.00696 RDL 1 ND 0.06 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results (using 1/2 RDL as conservative estimate) was
less than 2 x RDL.
BENZO(A)ANTHRACENE 8270C-SIM mg/kg 0.383 0.00696 RDL 1 0.383 0.06 RDL 10 Yes, RPD calculated 0.0%Yes
BENZO(A)PYRENE 8270C-SIM mg/kg 0.408 0.00696 RDL 1 0.434 0.06 RDL 10 Yes, RPD calculated 6.2%Yes
BENZO(B)FLUORANTHENE 8270C-SIM mg/kg 0.364 0.00696 RDL 1 0.429 0.06 RDL 10 Yes, RPD calculated 16.4%Yes
BENZO(G,H,I)PERYLENE 8270C-SIM mg/kg 0.253 0.00696 RDL 1 0.382 0.06 RDL 10 Yes, RPD calculated 40.6%Yes
BENZO(K)FLUORANTHENE 8270C-SIM mg/kg 0.146 0.00696 RDL 1 0.125 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair within control because the difference between the
Original and Duplicate sample results was less than 2 x RDL.
CHRYSENE 8270C-SIM mg/kg 0.454 0.00696 RDL 1 0.349 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair within control because the difference between the
Original and Duplicate sample results was less than 2 x RDL.
DIBENZ(A,H)ANTHRACENE 8270C-SIM mg/kg 0.047 0.00696 RDL 1 0.0697 J 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair within control because the difference between the
Original and Duplicate sample results was less than 2 x RDL.
FLUORANTHENE 8270C-SIM mg/kg 1.06 0.00696 RDL 1 1.13 0.06 RDL 10 Yes, RPD calculated 6.4%Yes
FLUORENE 8270C-SIM mg/kg 0.057 0.00696 RDL 1 ND 0.06 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results (using 1/2 RDL as conservative estimate) was
less than 2 x RDL.
INDENO(1,2,3-CD)PYRENE 8270C-SIM mg/kg 0.275 0.00696 RDL 1 0.239 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair within control because the difference between the
Original and Duplicate sample results was less than 2 x RDL.
NAPHTHALENE 8270C-SIM mg/kg 0.014 J 0.0232 RDL 1 ND 0.2 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results (using 1/2 RDL as conservative estimate) was
less than 2 x RDL.
PHENANTHRENE 8270C-SIM mg/kg 0.843 0.00696 RDL 1 0.141 0.06 RDL 10
No, Original is > 5 x RDL, but duplicate is < 5x RDL, RPD not calculated.
Field Duplicate pair not within control because the difference between the
Original and Duplicate sample results was greater than 2 x RDL.
PYRENE 8270C-SIM mg/kg 1.07 0.00696 RDL 1 1.34 0.06 RDL 10 Yes, RPD calculated 22.4%Yes
1-METHYLNAPHTHALENE 8270C-SIM mg/kg 0.033 0.0232 RDL 1 ND 0.2 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate within control because the difference between the Original and
Duplicate sample results (using 1/2 RDL as conservative estimate) was
less than 2 x RDL.
Original Sample Duplicate Sample
Date Collected 4/14/2023 4/14/2023
Lab Sample ID L1606384-15 L1606384-17
Client Sample ID SB-8-2-3 SB-108-2-3
Page 1 of 2
Table C6.3 - Duplicate Pair - Polycyclic Aromatic Hydrocarbons in Soil
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Tast 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 50%
for Soil?
Original Sample Duplicate Sample
Date Collected 4/14/2023 4/14/2023
Lab Sample ID L1606384-15 L1606384-17
Client Sample ID SB-8-2-3 SB-108-2-3
2-METHYLNAPHTHALENE 8270C-SIM mg/kg 0.02 J 0.0232 RDL 1 ND 0.2 RDL 10
No, Original is < 5 x RDL, but duplicate is < RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results (using 1/2 RDL as conservative estimate) was
less than 2 x RDL.
2-CHLORONAPHTHALENE 8270C-SIM mg/kg<0.0232 0.0232 RDL 1 ND 0.2 RDL 10
No, Original and Duplicate both < RDL.Field Duplicate pair within control
because the difference between the Original and Duplicate sample RDLs
was less than 2 x RDL.
Qualifiers (Q)
J: The identification of the analyte is acceptable; the reported value is an estimate.
mg/kg:Milligrams per kilogram.
RDL - Laboratory reported detection limit.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 50% for solid samples.
1 - For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than two times the RDL for solid samples.
Half the RDL was used for analytes.
Page 2 of 2
Table C6.4 - Duplicate Pairs–Dissolved Metals in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL? RPD
RPD Within
+/- 25%
for
Groundwater?
ARSENIC 6010B mg/l ND 0.01 RDL 1 0.00473 J 0.01 RDL 1
No, Original < RDL, but Duplicate < 5 x RDL, RPD not calculated. Field Duplicate pair within control
because the difference between the Original and Duplicate sample results (using 1/2 RDL as conservative
estimate) was less than RDL.
Yes
BARIUM 6010B mg/l 0.1 0.005 RDL 1 0.0999 0.005 RDL 1 Yes, RPD calculated 0.1% Yes
CADMIUM 6010B mg/l ND 0.002 RDL 1 ND 0.002 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than RDL.
CHROMIUM 6010B mg/l 0.00211 B J 0.01 RDL 1 ND 0.01 RDL 1
No, Original < 5 x RDL, but Duplicate < RDL, RPD not calculated. Field Duplicate pair within control
because the difference between the Original and Duplicate sample results (using 1/2 RDL as conservative
estimate) was less than RDL.
LEAD 6010B mg/l ND 0.006 RDL 1 ND 0.006 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than RDL.
MERCURY 7470 mg/l 0.0251 0.01 RDL 1 0.0187 0.01 RDL 1
No, Original and Duplicate both < 5 x RDL, RPD not calculated. Field Duplicate pair within control because
the difference between the Original and Duplicate sample RDLs was less than RDL.
SELENIUM 6010B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than RDL.
SILVER 6010B mg/l ND 0.0002 RDL 1 ND 0.0002 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated. Field Duplicate pair within control because the
difference between the Original and Duplicate sample RDLs was less than RDL.
Qualifiers (Q):
mg/l: Milligrams per liter.
RDL - Laboratory reported detection limit.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 25% for groundwater samples.
For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than RDL for groundwater samples.
B: Analyte was detected in the associated blank.
Original Sample Duplicate Sample
Date Collected 04/14/2023 04/14/2023
Lab Sample ID L1606417-08 L1606417-10
Client Sample ID SB-8 SB-108
J: The identification of the analyte is acceptable; the reported value is an estimate.
Page 1 of 1
Table C6.5 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61227496 Task 3.28
Analyte Method Units Result Q High
Limit
High
Limit
Type
Dilution
Factor Result Q High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 25%
for Groundwater?
TPH-DRO 8015 mg/l 0.0528 J 0.1 RDL 1 0.0373 J 0.1 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field Duplicate pair
within control because the difference between the Original and Duplicate sample
results was less than RDL.
TPH-GRO 8260B mg/l ND 0.5 RDL 1 ND 0.5 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
ACETONE 8260B mg/l ND 0.05 RDL 1 ND 0.05 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
ACROLEIN 8260B mg/l ND 0.05 RDL 1 ND 0.05 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
ACRYLONITRILE 8260B mg/l ND 0.01 RDL 1 ND 0.01 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
BENZENE 8260B mg/l 0.000135 J 0.001 RDL 1 ND 0.001 RDL 1
No, Original < 5 x RDL, but Duplicate < RDL, RPD not calculated.Field Duplicate pair
within control because the difference between the Original and Duplicate sample
results (using 1/2 RDL as conservative estimate) was less than RDL.
BROMOBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
BROMODICHLOROMETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
BROMOFORM 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
BROMOMETHANE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
N-BUTYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
SEC-BUTYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TERT-BUTYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CARBON TETRACHLORIDE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
Original Sample Duplicate Sample
Date Collected 04/14/2023 04/14/2023
Lab Sample ID L1606417-08 L1606417-10
Client Sample ID SB-8 SB-108
Page 1 of 5
Table C6.5 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61227496 Task 3.28
CHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CHLORODIBROMOMETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CHLOROETHANE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CHLOROFORM 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CHLOROMETHANE 8260B mg/l ND 0.0025 RDL 1 ND 0.0025 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
2-CHLOROTOLUENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
4-CHLOROTOLUENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2-DIBROMO-3-CHLOROPROPANE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2-DIBROMOETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
DIBROMOMETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2-DICHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,3-DICHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,4-DICHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
DICHLORODIFLUOROMETHANE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1-DICHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
Page 2 of 5
Table C6.5 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61227496 Task 3.28
1,2-DICHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1-DICHLOROETHENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CIS-1,2-DICHLOROETHENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TRANS-1,2-DICHLOROETHENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2-DICHLOROPROPANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1-DICHLOROPROPENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,3-DICHLOROPROPANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
CIS-1,3-DICHLOROPROPENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TRANS-1,3-DICHLOROPROPENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
2,2-DICHLOROPROPANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
DI-ISOPROPYL ETHER 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
ETHYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
HEXACHLORO-1,3-BUTADIENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
ISOPROPYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
P-ISOPROPYLTOLUENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
2-BUTANONE (MEK)8260B mg/l ND 0.01 RDL 1 ND 0.01 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
METHYLENE CHLORIDE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
Page 3 of 5
Table C6.5 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61227496 Task 3.28
4-METHYL-2-PENTANONE (MIBK)8260B mg/l ND 0.01 RDL 1 ND 0.01 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
METHYL TERT-BUTYL ETHER 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
NAPHTHALENE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
N-PROPYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
STYRENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1,1,2-TETRACHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1,2,2-TETRACHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1,2-TRICHLOROTRIFLUOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TETRACHLOROETHENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TOLUENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2,3-TRICHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2,4-TRICHLOROBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1,1-TRICHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,1,2-TRICHLOROETHANE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TRICHLOROETHENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
TRICHLOROFLUOROMETHANE 8260B mg/l ND 0.005 RDL 1 ND 0.005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2,3-TRICHLOROPROPANE 8260B mg/l ND 0.0025 RDL 1 ND 0.0025 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
Page 4 of 5
Table C6.5 - Duplicate Pair–VOCs and Petroleum Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61227496 Task 3.28
1,2,4-TRIMETHYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,2,3-TRIMETHYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
1,3,5-TRIMETHYLBENZENE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
VINYL CHLORIDE 8260B mg/l ND 0.001 RDL 1 ND 0.001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
XYLENES, TOTAL 8260B mg/l ND 0.003 RDL 1 ND 0.003 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
2-CHLOROETHYL VINYL ETHER 8260B mg/l ND 0.05 RDL 1 ND 0.05 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate pair within
control because the difference between the Original and Duplicate sample RDLs was
less than RDL.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
mg/l:Milligrams per liter.
RDL - Laboratory reported detection limit.
TPH-GRO - Total Petroleum Hydrocarbons Gasoline Range Organics.
TPH-DRO - Total Petroleum Hydrocarbons Diesel Range Organics.
TRPH - Total Recoverable Petroleum Hydrocarbons.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 25% for groundwater samples.
For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than RDL for groundwater samples.
Page 5 of 5
Table C6.6 - Duplicate Pair - Polycyclic Aromatic Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 25%
for
Groundwater?
ANTHRACENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
ACENAPHTHENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
ACENAPHTHYLENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
BENZO(A)ANTHRACENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
BENZO(A)PYRENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND J4 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
BENZO(B)FLUORANTHENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
BENZO(G,H,I)PERYLENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
BENZO(K)FLUORANTHENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
CHRYSENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
DIBENZ(A,H)ANTHRACENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
FLUORANTHENE 8270C-SIM mg/l ND 0.0001 RDL 1 ND 0.0001 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
FLUORENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
INDENO(1,2,3-CD)PYRENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
NAPHTHALENE 8270C-SIM mg/l 0.000116 J 0.00025 RDL 1 0.000195 J 0.00025 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results was less than RDL.
PHENANTHRENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
PYRENE 8270C-SIM mg/l ND 0.00005 RDL 1 ND 0.00005 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
Original Sample Duplicate Sample
Date Collected 04/14/2023 04/14/2023
Lab Sample ID L1606417-08 L1606417-10
Client Sample ID SB-8 SB-108
Page 1 of 2
Table C6.6 - Duplicate Pair - Polycyclic Aromatic Hydrocarbons in Groundwater
GIV Development - Citizens West, 509 West 300 North, Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61217496 Task 3.28
Analyte Method Units Result Q
High
Limit
High
Limit
Type
Dilution
Factor Result Q
High
Limit
High
Limit
Type
Dilution
Factor Results  5 x RDL?RPD
RPD Within
+/- 25%
for
Groundwater?
Original Sample Duplicate Sample
Date Collected 04/14/2023 04/14/2023
Lab Sample ID L1606417-08 L1606417-10
Client Sample ID SB-8 SB-108
1-METHYLNAPHTHALENE 8270C-SIM mg/l 0.00013 J 0.00025 RDL 1 0.000234 J 0.00025 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results was less than RDL.
2-METHYLNAPHTHALENE 8270C-SIM mg/l 0.000168 J 0.00025 RDL 1 0.000342 0.00025 RDL 1
No, Original and Duplicate results < 5 x RDL, RPD not calculated.Field
Duplicate pair within control because the difference between the Original
and Duplicate sample results was less than RDL.
2-CHLORONAPHTHALENE 8270C-SIM mg/l ND 0.00025 RDL 1 ND 0.00025 RDL 1
No, Original and Duplicate both < RDL, RPD not calculated.Field Duplicate
pair within control because the difference between the Original and
Duplicate sample RDLs was less than RDL.
Qualifiers (Q)
J: The identification of the analyte is acceptable; the reported value is an estimate.
J4: The associated batch QC was outside the established quality control range for accuracy.
mg/kg:Milligrams per kilogram.
RDL - Laboratory reported detection limit.
RPD - Relative Percent Difference was calculated when analyte concentrations are greater than or equal to five times the RDL. QA/QC RPD Goal is less than 25% for groundwater samples.
1 - For analytes reported at concentrations less than five times the RDL, the QA/QC Goal is the difference between the sample and its duplicate is less than two times the RDL for groundwater samples. Half the RDL was used for analytes reported
less than the RDL.
Page 2 of 2
APPENDIX D
Chain of Custody and Laboratory Data Sheets