DERR-2024-011417

6952 South High Tech Drive Ste. B
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials 1
Cover Page
Revised Second Quarterly
Groundwater Monitoring Report; July
2024
21st & 21st Properties
NEC 100 South and 2100 East
Salt Lake City, Salt Lake County, Utah
July 29, 2024 Revised September 6, 2024| Terracon Project No. 61197460
Prepared for:
Rockworth Companies
Holladay, Utah
6952 South High Tech Drive Ste. B
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials i
Cover Letter
September 6, 2024
Rockworth Companies
4655 South 2300 East, Suite 205
Holladay, Utah 84117
Attn: Mr. Tom Henriod
P: [phone]
E:[e-mail]
Re:Revised Second Quarterly Groundwater Monitoring Report
21st & 21st Properties
NEC 2100 South and 2100 East
Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197460
Dear Mr. Henriod:
Terracon Consultants, Inc. (Terracon) is pleased to submit this Revised Second Quarterly
Groundwater Monitoring Report documenting the second quarterly groundwater sampling
event conducted at the 21st and 21st Properties, located at 2100 South and 2100 East, Salt
Lake City, Utah.
Terracon has performed this work pursuant to the Remedial Action Plan (RAP; Terracon;
dated April 7, 2021) and subsequent Amendments submitted to the Utah Department of
Environmental Quality, Division of Solid Waste Management and Radiation Control (UDEQ,
DWMRC), who is the regulatory agency overseeing the cleanup of chlorinated solvents
present in the groundwater under the site. The work was also performed as part of the
cleanup of a Leaking Underground Storage Tank (LUST) facility (Facility ID 4002582,
Release Site ID NYA) present in the southwest portion of the site through the UDEQ Division
of Environmental Response and Remediation (DERR).
We appreciate the opportunity to have performed these services for you. Please contact our
office at [phone] if you have questions regarding this information or if we can
provide any other services.
Sincerely,
Terracon Consultants, Inc.
Andrew Turner Amy Austin
Project Manager Authorized Project Reviewer
' P \ ' X V W L Q
Facilities | Environmental | Geotechnical | Materials ii
Table Of Contents
1.0 Introduction ................................................................................ 1
1.1 Site Description ..................................................................................... 1
1.2 Soil Boring and Monitoring Well Installation ............................................... 2
1.3 Groundwater Elevation Survey ................................................................. 3
1.4 Scope of Services ................................................................................... 3
1.5 Standard of Care .................................................................................... 3
1.6 Additional Scope Limitations .................................................................... 4
1.7 Reliance ................................................................................................ 4
2.0 Groundwater Sampling Event......................................................... 4
2.1 Groundwater Sample Collection ............................................................... 4
2.2 General Observations ............................................................................. 5
3.0 Laboratory Analytical Methods ....................................................... 5
4.0 Data Evaluation ........................................................................... 5
4.1 Groundwater Sample Results ................................................................... 5
4.2 Quality Control ....................................................................................... 6
5.0 Findings And Conclusions .............................................................. 6
Facilities | Environmental | Geotechnical | Materials iii
APPENDICES
Appendix A Exhibits
Exhibit 1:Topographic Site Overview
Exhibit 2:Post Construction Monitoring Wells
Exhibit 3:Groundwater Elevation, June 2024
Exhibit 4: PCE Exceedances in Groundwater, March 2024
Exhibit 5: PCE Exceedances in Groundwater, June 2024
Appendix B Data Tables
Table 1:Well Construction and Groundwater Elevation Data
Table 2:Groundwater Analytical Results
Appendix C Monitoring Well Boring Logs
Appendix D Revised Site Management Plan Outline, February 17, 2022
Appendix E Well Development Forms
Appendix F Monitoring Well Sampling Field Notes
Appendix G Risk Evaluation Sheets
Appendix H Chain of Custody and Laboratory Data Sheets
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 1
1.0 Introduction
1.1 Site Description
The Site initially consisted of eight parcels. Numerous Phase I Environmental Site
Assessments and subsequent Limited Site Investigations were conducted at the properties
from approximately 2014 through 2019 by Terracon and others. Results of these studies
indicated there were soil and groundwater impacts from chlorinated volatile organic
compounds (VOCs) thought to have originated from on-site historical dry cleaning
businesses. In 2020, two additional parcels were added to the proposed development: the
Blue Plate Diner parcel and the 21st Coffee parcel. Two historical dry cleaners and
ahistorical gas station had operated at these properties, and these former businesses were
found to have contributed to the chlorinated VOC impacts. In addition, the historical gas
station was identified as a release site and was issued an Underground Storage Tank (UST)
facility ID and a Release ID. The ten parcels were re-apportioned into one parcel and
assigned the APN of 16-15-359-018-0000 and street address 2145 East 2100 South, which
is now the Site.
Investigations conducted at the site are detailed in the Remedial Action Plan (RAP, Terracon,
April 7, 2021) and are thus included in the public record. Three Amendments to the RAP
were also submitted detailing changes to soil and stockpile sampling methodology and
further characterization of specific areas of the site.
A Limited Site Investigation Report was submitted by Terracon on March 2, 2021, that
detailed the installation and sampling of three monitoring wells (MW-1 through MW-3) on
and off-site in order to determine whether there are impacts to soil and/or groundwater
relating to the historical on-site LUST facility and to monitor the potential impacts over time.
The monitoring wells were planned to be drilled to approximately 30 feet bgs, but MW-3
was only drilled to 26.5 feet bgs due to refusal. The wells were later developed, surveyed,
and sampled.
Groundwater from MW-1 had detections of tetrachloroethylene (PCE) and trichloroethylene
(TCE) above United States Environmental Protection Agency (EPA) Maximum Contaminant
Levels (MCLs) and PCE above the EPA commercial Vapor Intrusion Screening Level (VISL).
Groundwater from MW-2 detected PCE above the EPA MCL and EPA residential VISL. None
of the borings encountered soils with chlorinated compounds above EPA Regional Screening
Levels (RSLs).
Monitoring Well MW-3 could not be developed or sampled as it never yielded groundwater.
Monitoring Well MW-1 and MW-2 only periodically yielded enough groundwater to accurately
sample, and recharge was slow. Additionally, it was likely that MW-1 would eventually need
to be abandoned due to planned construction of a retail and residential building over that
location.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 2
A Revised Site Management Plan Outline was submitted to then DWMRC Project Manager,
Dale Urban, on February 17, 2022, as part of the continuing discussions concerning post-
construction site management and groundwater monitoring (Appendix D). The memo
detailed the construction of two new on-site monitoring wells (MW-4 and MW-5), one on-
site replacement monitoring well (MW-1A), and two offsite replacement monitoring wells
(MW-2A and MW-3A). The replacement wells MW-1A through MW-3A would be drilled to
deeper depths in order to ensure adequate groundwater recharge and accurate sampling
and be consistent with the new wells being constructed at the site. The memo also
discussed five years of groundwater monitoring with the first year consisting of quarterly
sampling events. Exhibit 1 (Appendix A) presents a topographic map of the area. Exhibit 2
(Appendix A) is a site diagram that shows the monitoring well locations. The replacement
wells are labeled as MW-1A, MW-2A, and MW-3A.
1.2 Soil Boring and Monitoring Well Installation
The original monitoring wells MW-1, MW-2, and MW-3 were first abandoned properly by
removing the well box. The 2-inch diameter PVC pipe was then filled with hydrated
bentonite chips. The well casing was then broken and the surface was restored to its original
condition (concrete, asphalt, or native soil). Since these wells did not exceed 30 feet bgs,
they were not subject to permitting under the Division of Water Rights.
Prior to monitoring well (new and replacement) drilling and installation, the public utility
location service (Blue Stakes of Utah) was notified at least 48 hours prior to digging or
drilling as required by law. In addition, a subcontracted private utility location service,
Earthview Technology Inc., was used to identify and mark subsurface utilities around each
well location. A Non-Production Well Application was filed with the State of Utah Division of
Water Rights, which is required for any monitoring well that extends below 30 feet bgs. The
groundwater monitoring wells were drilled by Cascade Environmental from January 9, 2024,
to January 12, 2024, using a limited-access sonic drill rig. During drilling, the soil was
logged and field-screened using sensory methods and a photoionization detector (PID) to
detect the presence of VOCs. Please refer to the soil boring and monitoring well construction
logs in Appendix C. The monitoring wells were drilled to an approximate depth of 40 feet
bgs.
The monitoring wells were constructed as follows:
Installation of 20 feet of 2-inch diameter (20-40 feet bgs), 0.010-inch machine
slotted polyvinyl chloride (PVC) well screen with a threaded bottom cap.
Installation of 2-inch diameter, threaded, flush-joint PVC riser pipe to the surface.
Addition of pre-sieved silica sand pack for annular sand pack around the well screen
from the bottom of the boring to approximately 2 feet above the top of the well
screen.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 3
Placement of hydrated bentonite chips above the sand pack to just below the well
box (approximately one-foot bgs).
Installation of a 7-inch diameter, circular, bolt-down, steel, monitoring well cover
with a locking well cap inset in a flush-mount concrete well pad.
After installation and prior to sampling, the wells were developed using a surge block and
bailer. Development continued until parameters (pH, temperature, dissolved oxygen (DO),
and conductivity) stabilized to have consecutive readings be within approximately 10% or
the when the well went completely dry multiple times after multiple bailing events. At least
nine purge volumes (calculated volume of water present in the water column) were
extracted from each monitoring well. Well development forms are provided in Appendix E.
Soil cuttings collected during drilling were placed in 55 gallon drums and picked up and
disposed of by E.T. Technologies, Inc. Purge water collected during well development and
later sampling was spread onsite and allowed to infiltrate into the ground.
1.3 Groundwater Elevation Survey
The elevation of the tops of the well casings were surveyed relative to an arbitrary semi-
permanent on-site benchmark. Horizontal locations were determined via an Arrow GPS unit
with sub-meter accuracy. Groundwater levels were measured in the monitoring wells prior
to groundwater sampling. The measured water levels were used in combination with the
casing elevations to evaluate groundwater elevations, direction of groundwater flow, and
gradient. Exhibit 3 (Appendix A) indicates the approximate groundwater gradient and flow
at the site. Based on the most recent data collected during this sampling event,
groundwater flows to the southwest across the site consistent with historical studies.
1.4 Scope of Services
The work was to sample five groundwater monitoring wells (three wells replacing older
wells) to assess the current groundwater conditions. This is the second of four quarterly
groundwater sampling events planned for the site.
1.5 Standard of Care
Terracon’s services were performed consistent with generally accepted practices of the
profession undertaken in similar studies in the same geographical area during the same
time period. Please note that Terracon does not warrant the work of laboratories, regulatory
agencies, or other third parties supplying information used to prepare the report. These
services were performed in accordance with the scope of services agreed with you, our
client, as reflected in our proposal, and were not restricted by ASTM E1903-19.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 4
1.6 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 services. 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, and we cannot represent that the site contains no hazardous substances, toxic
materials, petroleum products, or other latent conditions beyond those identified during this
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 recommendations are based solely upon data
obtained at the time and within the scope of these services.
1.7 Reliance
This report has been prepared for the exclusive use and reliance of Rockworth Companies
and the Utah Department of Environmental Quality (UDEQ). Use or reliance by any other
party is prohibited without the written authorization of the Rockworth Companies and
Terracon.
Reliance on the report by the client and all authorized parties will be subject to the terms,
conditions, and limitations stated in the proposal, report, and Terracon’s Terms and
Conditions. The limitation of liability defined in the Terms and Conditions is the aggregate
limit of Terracon’s liability to the client and all relying parties.
2.0 Groundwater Sampling Event
2.1 Groundwater Sample Collection
On June 21, 2024, Terracon collected groundwater samples from the three onsite and two
offsite monitoring wells (MW-1A, MW-2A, MW-3A, MW-4, and MW-5).
Wells were sampled via low flow sampling standard operating procedures, which included
the use of a peristaltic pump and new polyethylene tubing per well. Care was taken to
ensure that the tubing was placed approximately halfway between the top of the water
column and the bottom of the screen when samples were collected. Stabilization parameters
including temperature, pH, conductivity, DO, and oxygen reduction potential (ORP) were
recorded as measured by a YSI water quality meter. Wells were sampled when field
parameters stabilized as defined by three consecutive readings that were within
approximately 10 percent of each other.YSI readings are recorded in Table 3 (Appendix B).
Purge water was collected in a 55-gallon drum currently being stored on-site. Appendix F
includes the field notes associated with the groundwater sampling event.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 5
2.2 General Observations
Depth-to-water measurements and relative groundwater elevations are presented in Table 1
(Appendix B). Relative groundwater elevations at the site ranged between 68.70 (MW-3A)
and 78.24 (MW-5) feet above an arbitrary established benchmark.
The groundwater gradient at the site was determined using ArcGIS Pro and scaling the area
in order to interpolate locations of contour lines to show the gradient. The direction of
groundwater flow is generally toward the southwest (Exhibit 3, Appendix A), consistent with
historical data. Free product was not observed in any monitoring wells during this sampling
event.
3.0 Laboratory Analytical Methods
All groundwater samples were collected and placed in laboratory-prepared containers,
labeled, placed on ice in a cooler, and transported to Pace Analytical National Center for
Testing and Innovation (Pace Analytical) located in Mount Juliet, Tennessee. The
groundwater samples were submitted for analysis of VOCs using EPA Method 8260B. The
executed chain-of-custody form and laboratory data sheets are provided in Appendix H.
4.0 Data Evaluation
4.1 Groundwater Sample Results
Results of the groundwater sampling event are summarized in Table 2 (Appendix B).
Sample locations are shown on Exhibit 2 (Appendix A). As presented in Table 2 (Appendix
B), the following VOCs exceeded a regulatory screening level.
Well Analyte Exceedance
MW-1A
Chloroform
PCE
TCE
Residential VISL
Commercial VISL, MCL
Residential VISL
MW-2A
Chloroform
PCE
TCE
Residential VISL
Commercial VISL, MCL
Residential VISL
MW-3A Chloroform
PCE
Residential VISL
MCL
MW-4 Chloroform
PCE
Residential VISL
Commercial VISL, MCL
MW-5
Chloroform
PCE
TCE
Residential VISL
Commercial VISL, MCL
Residential VISL
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 6
PCE exceeded the Commercial VISL in the three onsite wells and offsite well MW-2 located
to the immediate west of the site. Residential VISL exceedances of TCE and chloroform were
reported in at least one well. The offsite well locations are current commercial businesses.
4.2 Quality Control
Quality control for the sampling program was provided by using standardized sample
collection and handling methods, documenting pertinent field information, and keeping
chain-of-custody records, as well as using a Utah-certified laboratory. All sampling
procedures followed Terracon’s Standard Operating Procedures and industry practices.
A review of the field procedures indicates that standard operating procedures were followed
with regards to sample collection, handling, and documentation. The analytical laboratory
report indicated that samples were extracted and analyzed within appropriate sample
holding times. Internal laboratory QA/QC procedures and results are presented in the
laboratory report and were within acceptable limits set by the laboratory, except where
noted.
5.0 Findings And Conclusions
On-Site Monitoring Well Results
PCE in groundwater is elevated at the site above Residential and Commercial VISLs. First
quarter groundwater sampling concentrations of PCE in groundwater (Exhibit 4) were
considerably higher than historical groundwater samples taken in the vicinity of MW-1A,
MW-4 and MW-5. However, results from this recent sampling event indicates that PCE
concentrations in groundwater have decreased considerably since the initial event (Exhibit
5). TCE is also elevated above Residential VISLs in select areas. A Vapor Intrusion Mitigation
System (VIMS) is currently still being installed at the site to mitigate potential vapor
intrusion associated with the elevated PCE in groundwater. It is expected to be fully
installed and operational shortly and prior to residents moving into the site. Extensive soil
removal has occurred at the site, and any possible on-site source of the contamination has
been removed. If the site is considered a source of the PCE contamination, it is expected
that the PCE concentrations in these onsite wells will decrease over time.
Minor construction of the VIMS system and vapor barrier is still being conducted at the site.
Vent pipe construction has not been fully completed, and the pipes have not been fully
tested. Additionally, commercial and residential tenants have not moved into the site. Since
PCE concentrations have significantly decreased since the original groundwater sampling
event, Terracon recommends conducting an additional round of quarterly groundwater
sampling (scheduled for September 2024) to determine whether a further investigation is
warranted.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
September 6, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 7
A former gas station was located in the southwest portion of the site, near monitoring well
MW-1A. The groundwater in this area does not appear to be contaminated with petroleum-
related hydrocarbons (benzene, toluene, ethylbenzene, xylenes, naphthalene) above
regulatory screening levels. The contaminated soil has been excavated and removed in this
area to the extent practicable. Future sampling events will also analyze groundwater for
total petroleum hydrocarbons (TPH) gasoline-range organics (GRO) and TPH diesel-range
organics (DRO). If continued groundwater monitoring indicates the absence of these
analytes above regulatory screening levels, closure of the DERR LUST portion of the site
should be considered.
Off-Site Monitoring Well Results
Off-site well MW-2A exceeded the Commercial VISL for PCE (Exhibit 5). Results from the
original sampling event were considerably higher than concentrations from the previous
sampling event at the initial adjacent well location, which did not exceed the Commercial
VISL. Results from this groundwater sampling event indicate a substantial decrease in PCE
concentration, although the concentration is still higher than the initial groundwater
sampling conducted in this area.
A risk evaluation was conducted on off-site monitoring well MW-2A using the EPA Regional
Screening Level (RSL) calculator to evaluate if the cumulative risk posed by chemicals
remaining in the off-site groundwater represent a human health risk at levels above target
maximum risk levels and hazard indices. A hazard quotient of 1.0 was used and a target
risk of 10-6 was selected to be conservative. Although this site is commercial, the scenario
was run as “Resident.” The concentrations of PCE, TCE, cis-1,2-dichloroethylene, and
chloroform were added to the RSL calculator. The results are presented below and shown in
Appendix G.
The cumulative carcinogenic risk posed by the remaining chemicals in the groundwater off-
site is 2.49 x 10-5, which is above the target excess residential cancer risk of 1 x 10-6 but
below the excess commercial residential cancer risk of 1 x 10-4. Additionally, the calculated
Hazard Index is 4.24. While this is above the target level for residential exposure, off-site
use around MW-2A is commercial.
Terracon recommends monitoring this location for the next several quarters in order to
determine whether contaminant concentrations are stable and decreasing. A risk evaluation
will be run after each sampling event, and further investigation will be considered (i.e. soil
gas investigation) if carcinogenic commercial land use exceedances are determined.
Appendix A
Exhibits
Appendix B
Data Tables
Table 1
21st and 21st Properties
2100 South 2100 East, Salt Lake City, Utah
Well Construction and Groundwater Elevation Data
Well ID Well Diameter
(inches)
Screened
Interval
(ft-bgs)
Well Depth
(feet)
Top of
Casing
Elevation
(feet)
Date
Depth to
Water
(ft-btoc)
Ground Water
Elevation
(feet)
97.65 03/21/24 24.89 72.76
97.36 06/21/24 24.70 72.66
96.09 03/21/24 27.78 68.31
95.79 06/21/24 26.38 69.41
96.10 03/21/24 28.88 67.22
95.80 06/21/24 27.40 68.40
NM 03/21/24 24.90 NM
100.23 06/21/24 23.88 76.35
102.49 03/21/24 25.27 77.22
102.20 06/21/24 24.25 77.95
NOTES:
ft-bgs = Feet below ground surface.
ft-btoc = Feet below top of casing.
NM = Not measured.
39.86
40.27
40.04
39.88
20-40
20-40
20-40
20-40
20-40 40.21
MW-1A
MW-2A
MW-3A
MW-4
MW-5
2
2
2
2
2
Page 1 of 1 Terracon Consultants
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS Result Q MDL RDL Result Q MDL RDL
ACETONE 67-64-1 8260B mg/l NE 22500 94500 NE NE NE <0.0500 0.0113 0.05 <0.0500 J3 J4 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 J3 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 J4 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
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
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
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
BROMOMETHANE 74-83-9 8260B mg/l NE 0.0174 0.073 NE NE NE <0.00500 0.000605 0.005 <0.00500 J3 0.000605 0.005
N-BUTYLBENZENE 104-51-8 8260B mg/l NE NE NE NE NE NE 0.00131 0.000157 0.001 <0.00100 0.000157 0.001
SEC-BUTYLBENZENE 135-98-8 8260B mg/l NE NE NE NE NE NE 0.000735 J 0.000125 0.001 <0.00100 0.000125 0.001
TERT-BUTYLBENZENE 98-06-6 8260B mg/l NE NE NE NE NE NE 0.000194 J 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
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
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
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
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE NE NE NE <0.0500 0.000575 0.05 <0.0500 0.000575 0.05
CHLOROFORM 67-66-3 8260B mg/l 0.08 0.000814 0.00355 NE NE NE 0.00122 J 0.000111 0.005 0.00135 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
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
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
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
1,2-DIBROMOETHANE 106-93-4 8260B mg/l 0.00005 0.000176 0.000769 NE NE 0.00005 <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
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
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
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
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
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
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
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
CIS-1,2-DICHLOROETHENE 156-59-2 8260B mg/l 0.07 NE NE NE NE 0.07 <0.00100 0.000126 0.001 0.000364 J 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
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
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
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
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
L1750411-01
MW-1A
6/21/2024
24.70
Lab Sample ID L1718417-01
Client Sample ID MW-1A
Date Collected 3/21/2024
Depth to Water (ft)24.89
Page 1 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS Result Q MDL RDL Result Q MDL RDL
L1750411-01
MW-1A
6/21/2024
24.70
Lab Sample ID L1718417-01
Client Sample ID MW-1A
Date Collected 3/21/2024
Depth to Water (ft)24.89
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
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
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
ETHYLBENZENE 100-41-4 8260B mg/l 0.7 0.00349 0.0152 0.7 4 0.7 0.000717 J 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
ISOPROPYLBENZENE 98-82-8 8260B mg/l NE 0.887 3.73 NE NE NE 0.00103 0.000105 0.001 <0.00100 0.000105 0.001
P-ISOPROPYLTOLUENE 99-87-6 8260B mg/l NE NE NE NE NE NE 0.000523 J 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 J3 J4 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
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
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 J4 0.000101 0.001
NAPHTHALENE 91-20-3 8260B mg/l NE 0.00459 0.0201 0.7 0.7 NE 0.00386 J 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 0.00217 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
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
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
1,1,2-TRICHLOROTRIFLUOROETHANE 76-13-1 8260B mg/l NE 0.242 1.02 NE NE NE <0.00100 0.00018 0.001 <0.00100 0.00018 0.001
TETRACHLOROETHENE 127-18-4 8260B mg/l 0.005 0.0149 0.0652 NE NE 0.005 0.431 0.003 0.01 0.274 0.003 0.01
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
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
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
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
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
TRICHLOROETHENE 79-01-6 8260B mg/l 0.005 0.00119 0.00743 NE NE 0.005 0.00122 0.00019 0.001 0.00123 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
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
1,2,4-TRIMETHYLBENZENE 95-63-6 8260B mg/l NE 0.248 1.04 NE NE NE 0.0265 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 0.00909 0.000104 0.001 <0.00100 0.000104 0.001
Page 2 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS Result Q MDL RDL Result Q MDL RDL
L1750411-01
MW-1A
6/21/2024
24.70
Lab Sample ID L1718417-01
Client Sample ID MW-1A
Date Collected 3/21/2024
Depth to Water (ft)24.89
1,3,5-TRIMETHYLBENZENE 108-67-8 8260B mg/l NE 0.175 0.733 NE NE NE 0.00955 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
XYLENES, TOTAL 1330-20-7 8260B mg/l 10 0.385 1.62 10 10 10 0.012 0.000174 0.003 <0.00300 0.000174 0.003
J3: The associated batch QC was outside the established quality control range for precision.
J4: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
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.
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.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
B: The same analyte is found in the associated blank.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2023.
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2023).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2023).
Page 3 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
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
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE 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 0.00005 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
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
Result Q MDL RDL Result Q MDL RDL
<0.0500 0.0113 0.05 <0.0500 J3 J4 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 J3 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 J4 0.000671 0.01
<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 0.000136 0.001 <0.00100 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 J3 0.000605 0.005
<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 0.000127 0.001 <0.00100 0.000127 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 0.00014 0.001 <0.00100 0.00014 0.001
<0.00500 0.000192 0.005 <0.00500 0.000192 0.005
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05
0.00128 J 0.000111 0.005 0.000972 J 0.000111 0.005
<0.00250 0.00096 0.003 <0.00250 0.00096 0.003
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000122 0.001 <0.00100 0.000122 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 0.00012 0.001 <0.00100 0.00012 0.001
<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 0.0000819 0.001 <0.00100 0.0000819 0.001
<0.00100 0.000188 0.001 <0.00100 0.000188 0.001
<0.00100 0.000126 0.001 0.000259 J 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 0.000142 0.001 <0.00100 0.000142 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
L1750411-02
MW-2A
6/21/2024
26.38
L1718417-02
MW-2A
3/21/2024
27.78
Page 4 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
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-TRICHLOROTRIFLUOROETHANE 76-13-1 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
Result Q MDL RDL Result Q MDL RDL
L1750411-02
MW-2A
6/21/2024
26.38
L1718417-02
MW-2A
3/21/2024
27.78
<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 0.000105 0.001 <0.00100 0.000105 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 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 J3 J4 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 J4 0.000101 0.001
<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 0.000118 0.001 <0.00100 0.000118 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 0.00018 0.001 <0.00100 0.00018 0.001
0.407 0.003 0.01 0.137 0.0015 0.005
<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 0.000481 0.001 <0.00100 0.000481 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
0.00144 0.00019 0.001 0.00411 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.003 <0.00250 0.000237 0.003
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
Page 5 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
J3: The associated batch QC was outside the established quality control range for precision.
J4: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
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.
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.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
B: The same analyte is found in the associated blank.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2023.
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2023).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2023).
Result Q MDL RDL Result Q MDL RDL
L1750411-02
MW-2A
6/21/2024
26.38
L1718417-02
MW-2A
3/21/2024
27.78
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003
Page 6 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
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
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE 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 0.00005 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
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
Result Q MDL RDL Result Q MDL RDL
<0.0500 0.0113 0.05 <0.0500 J3 J4 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 J3 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 J4 0.000671 0.01
<0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001
<0.00100 0.000118 0.001 <0.00100 0.000118 0.001
0.000335 J 0.000136 0.001 <0.00100 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 J3 0.000605 0.005
<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 0.000127 0.001 <0.00100 0.000127 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 0.00014 0.001 <0.00100 0.00014 0.001
<0.00500 0.000192 0.005 <0.00500 0.000192 0.005
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05
0.00233 J 0.000111 0.005 0.00134 J 0.000111 0.005
<0.00250 0.00096 0.003 <0.00250 0.00096 0.003
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000122 0.001 <0.00100 0.000122 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 0.00012 0.001 <0.00100 0.00012 0.001
<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 0.0000819 0.001 <0.00100 0.0000819 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 0.000149 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 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.000111 0.001 <0.00100 0.000111 0.001
L1750411-03
MW-3A
6/21/2024
L1718417-03
MW-3A
3/21/2024
28.88 27.40
Page 7 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
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-TRICHLOROTRIFLUOROETHANE 76-13-1 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
Result Q MDL RDL Result Q MDL RDL
L1750411-03
MW-3A
6/21/2024
L1718417-03
MW-3A
3/21/2024
28.88 27.40
<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 0.000105 0.001 <0.00100 0.000105 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 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 J3 J4 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 J4 0.000101 0.001
<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 0.000118 0.001 <0.00100 0.000118 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 0.00018 0.001 <0.00100 0.00018 0.001
0.00522 0.0003 0.001 0.00513 0.0003 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 0.000481 0.001 <0.00100 0.000481 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 0.00019 0.001 <0.00100 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.003 <0.00250 0.000237 0.003
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
Page 8 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
J3: The associated batch QC was outside the established quality control range for precision.
J4: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
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.
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.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
B: The same analyte is found in the associated blank.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2023.
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2023).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2023).
Result Q MDL RDL Result Q MDL RDL
L1750411-03
MW-3A
6/21/2024
L1718417-03
MW-3A
3/21/2024
28.88 27.40
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003
Page 9 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
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
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE 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 0.00005 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
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
Result Q MDL RDL Result Q MDL RDL
<0.0500 0.0113 0.05 <0.0500 J3 J4 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 J3 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 J4 0.000671 0.01
<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 0.000136 0.001 0.000175 J 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 J3 0.000605 0.005
<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 0.000127 0.001 <0.00100 0.000127 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 0.00014 0.001 <0.00100 0.00014 0.001
<0.00500 0.000192 0.005 <0.00500 0.000192 0.005
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05
0.00106 J 0.000111 0.005 0.00163 J 0.000111 0.005
<0.00250 0.00096 0.003 <0.00250 0.00096 0.003
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000122 0.001 <0.00100 0.000122 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 0.00012 0.001 <0.00100 0.00012 0.001
<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 0.0000819 0.001 <0.00100 0.0000819 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 0.000149 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 0.00011 0.001 <0.00100 0.00011 0.001
<0.00100 0.000111 0.001 <0.00100 0.000111 0.001
L1750411-04L1718417-04
MW-4 MW-4
3/21/2024
24.90
6/21/2024
23.88
Page 10 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
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-TRICHLOROTRIFLUOROETHANE 76-13-1 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
Result Q MDL RDL Result Q MDL RDL
L1750411-04L1718417-04
MW-4 MW-4
3/21/2024
24.90
6/21/2024
23.88
<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 0.000105 0.001 <0.00100 0.000105 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 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 J3 J4 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 J4 0.000101 0.001
<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 0.000118 0.001 <0.00100 0.000118 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 0.00018 0.001 <0.00100 0.00018 0.001
0.819 0.006 0.02 0.403 0.003 0.01
<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 0.000481 0.001 <0.00100 0.000481 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
0.000355 J 0.00019 0.001 <0.00100 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.003 <0.00250 0.000237 0.003
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
Page 11 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
J3: The associated batch QC was outside the established quality control range for precision.
J4: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
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.
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.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
B: The same analyte is found in the associated blank.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2023.
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2023).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2023).
Result Q MDL RDL Result Q MDL RDL
L1750411-04L1718417-04
MW-4 MW-4
3/21/2024
24.90
6/21/2024
23.88
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003
Page 12 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
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
2-CHLOROETHYL VINYL ETHER 110-75-8 8260B mg/l NE NE NE 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 0.00005 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
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
Result Q MDL RDL Result Q MDL RDL
<0.0500 0.0113 0.05 <0.0500 J3 J4 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 J3 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 J4 0.000671 0.01
<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 0.000136 0.001 0.000185 J 0.000136 0.001
<0.00100 0.000129 0.001 <0.00100 0.000129 0.001
<0.00500 0.000605 0.005 <0.00500 J3 0.000605 0.005
<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 0.000127 0.001 <0.00100 0.000127 0.001
<0.00100 0.000128 0.001 <0.00100 0.000128 0.001
0.000129 J 0.000116 0.001 <0.00100 0.000116 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
<0.0500 0.000575 0.05 <0.0500 0.000575 0.05
0.00208 J 0.000111 0.005 0.00171 J 0.000111 0.005
<0.00250 0.00096 0.003 <0.00250 0.00096 0.0025
<0.00100 0.000106 0.001 <0.00100 0.000106 0.001
<0.00100 0.000114 0.001 <0.00100 0.000114 0.001
<0.00500 0.000276 0.005 <0.00500 0.000276 0.005
<0.00100 0.000126 0.001 <0.00100 0.000126 0.001
<0.00100 0.000122 0.001 <0.00100 0.000122 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 0.00012 0.001 <0.00100 0.00012 0.001
<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 0.0000819 0.001 <0.00100 0.0000819 0.001
<0.00100 0.000188 0.001 <0.00100 0.000188 0.001
0.000431 J 0.000126 0.001 0.000313 J 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 0.000142 0.001 <0.00100 0.000142 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
L1750411-05
MW-5
6/21/2024
24.25
MW-5
L1718417-05
25.27
3/21/2024
Page 13 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
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-TRICHLOROTRIFLUOROETHANE 76-13-1 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
Result Q MDL RDL Result Q MDL RDL
L1750411-05
MW-5
6/21/2024
24.25
MW-5
L1718417-05
25.27
3/21/2024
<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 0.000105 0.001 <0.00100 0.000105 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 0.000105 0.001 <0.00100 0.000105 0.001
<0.00100 0.00012 0.001 <0.00100 0.00012 0.001
<0.0100 0.00119 0.01 <0.0100 J3 J4 0.00119 0.01
<0.00500 0.00043 0.005 <0.00500 0.00043 0.005
<0.0100 0.000478 0.01 <0.0100 0.000478 0.01
<0.00100 0.000101 0.001 <0.00100 J4 0.000101 0.001
<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 0.000118 0.001 <0.00100 0.000118 0.001
0.00389 0.000147 0.001 0.00251 0.000147 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
6.89 0.075 0.25 2.99 0.015 0.05
<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 0.000481 0.001 <0.00100 0.000481 0.001
<0.00100 0.000149 0.001 <0.00100 0.000149 0.001
0.000793 J 0.000158 0.001 <0.00100 0.000158 0.001
0.00263 0.00019 0.001 0.00165 0.00019 0.001
<0.00500 0.00016 0.005 <0.00500 0.00016 0.005
<0.00250 0.000237 0.003 <0.00250 0.000237 0.0025
<0.00100 0.000322 0.001 <0.00100 0.000322 0.001
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
Page 14 of 15
Table 2 - Groundwater Analytical Results
21st 21st Properties - 2100 South 2100 East, Salt Lake City, Utah
Terracon Project No. 61197460
Analyte CAS Method Units MCL VISL
Residential
VISL
Commercial ISL Tier 1 UGWQS
NE 22500 94500 NE NE NE
Lab Sample ID
Client Sample ID
Date Collected
Depth to Water (ft)
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
J3: The associated batch QC was outside the established quality control range for precision.
J4: The sample matrix interfered with the ability to make any accurate determination; spike value is high.
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.
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.
Qualifiers (Q):
J: The identification of the analyte is acceptable; the reported value is an estimate.
B: The same analyte is found in the associated blank.
EPA VISL: Target Groundwater Concentration (TGC) Vapor Intrusion Screening Level (VISL); November 2023.
EPA RSL: Environmental Protection Agency Regional Screening level for drinking water (November 2023).
EPA MCL: Environmental Protection Agency Maximum Contaminant Level for drinking water (November 2023).
Result Q MDL RDL Result Q MDL RDL
L1750411-05
MW-5
6/21/2024
24.25
MW-5
L1718417-05
25.27
3/21/2024
<0.00100 0.000104 0.001 <0.00100 0.000104 0.001
<0.00100 0.000234 0.001 <0.00100 0.000234 0.001
<0.00300 0.000174 0.003 <0.00300 0.000174 0.003
Page 15 of 15
Appendix C
Monitoring Well Boring Logs
5.0
13.0
18.0
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), greenish gray, slightly moist, fine
subangular gravel, fine to coarse-grained subrounded sand, variable clay, zones of sand with gravel
odor
SILT (ML), light brownish gray to greenish gray, slightly moist, soft, non-plastic, some caly and fine
sand with SM lenses present, clayey at bottom odor.
SILTY SAND (SM), olive brown to greenish gray, slightly moist, fine to medium-grained subrounded
sand, some SP layers.
Well completed
with traffic-rated
well box and
7-inch well cover.
2" Blank PVC
0-20'
Hydrated
bentonite 1-18'
2.0
565.5
266.1
981.2
558.6
583.2
325.5
469.9
552.3
295.7
718.9
864.7
707.1
615.4
715.1
292.2
588.6
242.9
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 1 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-1A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-1
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
5
10
15
Well Completion:
INSTALLATION DETAILS
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
19.0
24.0
31.0
POORLY GRADED SAND (SP), reddish brown, moist, fine to medium-grained subrounded sand,
minor silt, coarse sand, and fine gravel.
CLAYEY SAND (SC), reddish brown, moist, fine to coarse-grained subrounded sand, with fine
gravel, zones of gravel with sand and clay locally.
Cobbles encountered 22 ft bgs, more gravel.
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, moist to wet, fine
subangular gravel, fine to coarse-grained subrounded sand, variable clay, some cobbles. More clay
25-27 ft bgs. More cobbles 27 ft.
LEAN CLAY (CL), reddish brown, moist to wet, soft to firm, medium plasticity, thin SM and SP
layers present.
Silica Sand Pack
18'-30'
2" slotted (0.010
in) PVC Screen
20'-40'
72.4
51.9
1635
572.4
278.2
147.2
106.5
81.9
139.1
15.1
8.2
0.0
0.0
0.0
0.0
0.0
0.0
0.0
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 2 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-1A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-2
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
20
25
30
35
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
40.0
LEAN CLAY (CL), reddish brown, moist to wet, soft to firm, medium plasticity, thin SM and SP
layers present.(continued)
Boring Terminated at 40 Feet
0.0
0.0
0.0
0.0
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 3 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-1A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-3
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
40
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
RE
C
O
V
E
R
Y

(
%
)
0.3
1.1
4.7
6.1
9.0
15.0
ASPHALT, Approximately 4 inches asphalt.
FILL - POORLY GRADED GRAVEL WITH SAND (GP), dark brown to olive brown, moist, fine
subangular gravel, fine to coarse-grained subrounded sand, some silt and clay.
SILT (ML), dark brown to yellowish brown, slightly moist, firm, non-plastic, some clay and clayey
zones, siltier with depth.
SILTY SAND (SM), yellowish brown, slightly moist, fine sand, minor coarser sand and isolated fine
gravels.
LEAN CLAY (CL), light brownish gray, moist, soft, medium plasticity, minor yellowish brown
mottling.
LEAN CLAY (CL), light brownish gray, moist, firm, low to medium plasticity, yellowish brown
mottling, some apparent silty layers.
SILTY SAND (SM), light brownish gray, moist, fine sand, variable silt.
Well completed
with traffic-rated
well box and
7-inch well cover.
2" Blank PVC
0-20'
Hydrated
bentonite 1-18'
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 1 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-11-2024
WELL LOG NO. MW-2A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-4
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
5
10
15
Well Completion:
INSTALLATION DETAILS
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 33 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
21.0
22.1
22.4
26.1
30.0
32.0
33.0
34.5
SILTY SAND (SM), light brownish gray, moist, fine sand, variable silt.(continued)
Thin gravel with sand layer (GP)
CLAYEY SAND (SC), reddish brown, moist, fine sand, clay with sand locally, clay is soft with
medium plasticity.
LEAN CLAY (CL), reddish brown, moist, hard, medium plasticity.
CLAYEY SAND (SC), reddish brown, moist, fine to medium-grained subrounded sand, minor
coarser sand and isolated fine gravels, sandier than above with more gravels with depth.
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, moist, fine
subangular gravel, fine to medium-grained sugrounded sand, some coarser gravel, SC with gravel
locally, clay is firm with medium plasticity, less gravels with depth.
LEAN CLAY WITH SAND (CL), reddish brown, moist, medium plasticity, fine-grained sand,
localized medium to coarse gravel.
CLAYEY SAND (SC), reddish brown, moist, fine to medium-grained sand, minor layers of coarser
sand, medium plasticity clay.
Increased sand, trace isolated fine gravels.
LEAN CLAY WITH SAND (CL), reddish brown, wet, firm, some silt, no gravel.
LEAN CLAY WITH SAND (CL), light grayish brown, wet, firm, low plasticity, wiht 2" lenses of sand.
Silica Sand Pack
18'-30'
2" slotted (0.010
in) PVC Screen
20'-40'0.4
0.2
0.4
0.4
0.6
0.2
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 2 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-11-2024
WELL LOG NO. MW-2A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-5
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
20
25
30
35
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 33 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
38.5
40.0
LEAN CLAY WITH SAND (CL), light grayish brown, wet, firm, low plasticity, wiht 2" lenses of sand.
(continued)
Soft sand with clay layer.
LEAN CLAY WITH SAND (CL), light grayish brown, wet, soft, low plasticity, isolated fine to coarse
subrounded gravel.
Boring Terminated at 40 Feet
0.0
0.6
0.8
0.4
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 3 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-11-2024
WELL LOG NO. MW-2A
Rockworth Companies
Driller: Cascade
Well Completed: 01-11-2024
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: 21st and 21st
B-6
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
40
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 33 ft bgs.
WATER LEVEL OBSERVATIONS
100
RE
C
O
V
E
R
Y

(
%
)
0.5
1.6
4.6
6.3
9.2
14.8
TOPSOIL, Approximately 6 inches topsoil
FILL - POORLY GRADED GRAVEL WITH SAND (GP), dark brown to olive brown, moist, fine
subangular gravel, fine to coarse-grained subrounded sand, some silt and clay (GP-SC locally).
SILT (ML), dark brown to yellowish brown, slightly moist, firm, non-plastic, some clay in upper
portion.
SILTY SAND (SM), yellowish brown, slightly moist, fine sand, variable silt.
LEAN CLAY (CL), light brownish gray, moist, soft, medium plasticity.
LEAN CLAY (CL), light brownish gray, moist, soft to firm, low to medium plasticity, yellowish brown
mottling.
SILTY SAND (SM), light brownish gray, moist, fine sand, variable silt with apparent thin silty lenses.
Well completed
with traffic-rated
well box and
7-inch well cover.
2" Blank PVC
0-20'
Hydrated
bentonite 1-18'
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 1 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-12-2024
WELL LOG NO. MW-3A
Rockworth Companies
Driller: Cascade
Well Completed: 01-12-2024
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: 21st and 21st
B-7
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
5
10
15
Well Completion:
INSTALLATION DETAILS
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountred approximately 31 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
21.5
22.5
22.9
24.6
26.0
29.5
32.1
35.0
SILTY SAND (SM), light brownish gray, moist, fine sand, variable silt with apparent thin silty lenses.
(continued)
Thin gravel layer 18.7 ft.
CLAYEY SAND (SC), reddish brown, moist, fine sand, some coarser sand and occasional fine
gravel, clay with sand (CL) locally, clay is firm with low plasticity.
LEAN CLAY (CL), reddish brown, moist, firm, low to medium plasticity.
CLAYEY SAND (SC), reddish brown, slightly moist, fine to medium-grained subrounded sand,
some fine subangular gravels (GP-GC locally), more gravels with depth. Transitional bottom contact.
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, slightly moist, fine
subangulr gravel, some coarse gravel and cobbles, fine to medium-grained subrounded sand, variable
clay - GP with sand locally.
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, slightly moist, fine
angular gravel, soft and low plasticity clay, cobbles present.
CLAYEY SAND (SC), light grayish brown, moist to wet, soft clay, trace fine gravel.
LEAN CLAY WITH SAND (CL), light reddish brown, wet, trace fine gravel.
POORLY GRADED GRAVEL WITH SAND (GP), reddish brown, wet, fine to coarse subrounded to
subangular gravel, cobbles present. 2-4" silty lenses with trace clay present.
Silica Sand Pack
18'-30'
2" slotted (0.010
in) PVC Screen
20'-40'0.9
0.4
0.4
0.6
0.8
0.3
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 2 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-12-2024
WELL LOG NO. MW-3A
Rockworth Companies
Driller: Cascade
Well Completed: 01-12-2024
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: 21st and 21st
B-8
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
20
25
30
35
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountred approximately 31 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
36.5
38.8
40.0
CLAYEY SAND (SC), reddish brown, wet, with silt and fine subrounded gravel.
LEAN CLAY WITH SAND (CL), light reddish brown, wet, firm.
Boring Terminated at 40 Feet
0.5
0.4
0.8
0.6
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 3 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-12-2024
WELL LOG NO. MW-3A
Rockworth Companies
Driller: Cascade
Well Completed: 01-12-2024
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: 21st and 21st
B-9
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
40
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountred approximately 31 ft bgs.
WATER LEVEL OBSERVATIONS
100
RE
C
O
V
E
R
Y

(
%
)
0.5
2.5
4.9
5.9
7.5
16.2
CONCRETE, Approximately 6 inches concrete.
FILL - POORLY GRADED GRAVEL WITH SAND (GP), olive brown to yellowish brown, slightly
moist, fine subangular gravel, fine to coarse-grained subrounded sand, some silt, some thin sand
layers.
SILT (ML), dark brown, slightly moist, firm, non plastic, some clay, minor fine sand.
SILTY SAND (SM), yellowish brown, slightly moist, fine to medium-grained subrounded sand.
POORLY GRADED SAND (SP), yellowish brwon, slightly moist, fine to medium-grained
subrounded sand, minor coarse sand and fine gravel.
LEAN CLAY (CL), light brownish gray to greenish gray, moist, firm, low to medium plasticity,
yellowish brown mottling, some silt, some iron staining. Increasing moisture with depth, more silt and
fine sand (SM/ML) at very bottom.
SILTY SAND (SM), light brownish gray, moist, fine sand, greenish gray mottling, silt with minor clay
locally, dark staining and odor noted.
Well completed
with traffic-rated
well box and
7-inch well cover.
2" Blank PVC
0-20'
Hydrated
bentonite 1-18'
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 1 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-4
Rockworth Companies
Driller: Cascade
Well Completed: 01-10-2024
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: 21st and 21st
B-10
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
5
10
15
Well Completion:
INSTALLATION DETAILS
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 28 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
19.0
20.0
21.0
22.0
23.3
26.5
29.3
30.0
32.0
35.0
SILTY SAND (SM), light brownish gray, moist, fine sand, greenish gray mottling, silt with minor clay
locally, dark staining and odor noted.(continued)
POORLY GRADED SAND (SP), yellowish brown, moist, fine to medium-grained subrounded sand,
minor coarse sand and fine gravel, minor darker staining.
POORLY GRADED GRAVEL WITH SAND (GP), reddish brown to olive brown, moist, fine
subangular gravel, fine to coarse-grained subrounded sand, some silt, minor staining.
LEAN CLAY (CL), reddish brown, moist, firm, low to medium plasticity, some silt and fine sand.
POORLY GRADED SAND (SP), reddish brown, moist, fine to medium-grained subrounded sand,
some coarser sand and fine gravel.
SILTY SAND (SM), reddish brown, moist, fine sand, few thin SP layers.
Gravels and cobbles encountred.
POORLY GRADED SAND (SP), reddish brown, moist to wet, fine to medium-grained subrounded
sand, some grayish mottling, minor silt, thin coarser sand and fine gravel layers, thin silty sand layers
throughout.
POORLY GRADED GRAVEL WITH SAND (GP), reddish brown to yellowish brown, wet, fine
subangular gravel, fine to coarse-grained subrounded sand, minor silt and coarse gravel.
POORLY GRADED SAND WITH CLAY (SP-SC), reddish brown, wet, fine to medium-grained
subrounded sand, some aoarse sand and fine gravels.
LEAN CLAY WITH SAND (CL), reddish brown and light brownish gray, wet, soft to firm, medium
plasticity.
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, wet, fine to coarse
subangular gravel, fine to coarse-grained subrounded sand, variable clay, cobbles present.
Silica Sand Pack
18'-30'
2" slotted (0.010
in) PVC Screen
20'-40'0.4
2.1
0.1
0.4
1.0
0.0
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 2 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-4
Rockworth Companies
Driller: Cascade
Well Completed: 01-10-2024
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: 21st and 21st
B-11
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
20
25
30
35
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 28 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
38.0
40.0
POORLY GRADED GRAVEL WITH CLAY AND SAND (GP-GC), reddish brown, wet, fine to coarse
subangular gravel, fine to coarse-grained subrounded sand, variable clay, cobbles present.
(continued)
CLAYEY SAND (SC), reddish brown and light brownish gray, moist to wet, soft to firm, medium
plasticity clay, fine to medium-grained subrounded sand.
Boring Terminated at 40 Feet
0.0
0.0
0.1
0.3
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 3 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-10-2024
WELL LOG NO. MW-4
Rockworth Companies
Driller: Cascade
Well Completed: 01-10-2024
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: 21st and 21st
B-12
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
40
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 28 ft bgs.
WATER LEVEL OBSERVATIONS
100
RE
C
O
V
E
R
Y

(
%
)
0.5
2.5
4.9
5.9
7.5
16.2
CONCRETE, Approximately 6 inches concrete.
FILL - POORLY GRADED GRAVEL WITH SAND (GP), olive brown to yellowish brown, dry, fine
subangular gravel, fine to coarse-grained subrounded sand, some silt, some thin sand layers.
SILT (ML), dark brown, slightly moist, firm, non plastic, some clay, minor fine sand.
SILTY SAND (SM), yellowish brown, slightly moist, fine to medium-grained subrounded sand.
POORLY GRADED SAND (SP), yellowish brwon, slightly moist, fine to medium-grained
subrounded sand, minor coarse sand and fine gravel.
LEAN CLAY (CL), light brownish gray to greenish gray, moist, firm, low to medium plasticity,
yellowish brown mottling, some silt, some iron staining. Increasing moisture with depth, more silt and
fine sand (SM/ML) at very bottom.
SILTY SAND (SM), light brownish gray, moist, fine sand, silt with minor clay locally.
Well completed
with traffic-rated
well box and
7-inch well cover.
2" Blank PVC
0-20'
Hydrated
bentonite 1-18'
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 1 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-09-2024
WELL LOG NO. MW-5
Rockworth Companies
Driller: Cascade
Well Completed: 01-09-2024
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: 21st and 21st
B-13
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
5
10
15
Well Completion:
INSTALLATION DETAILS
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
19.0
20.0
21.0
22.0
23.3
25.0
27.0
30.0
SILTY SAND (SM), light brownish gray, moist, fine sand, silt with minor clay locally.(continued)
POORLY GRADED SAND (SP), yellowish brown, moist, fine to medium-grained subrounded sand,
minor coarse sand and fine gravel.
POORLY GRADED GRAVEL WITH SAND (GP), reddish brown to olive brown, moist, fine
subangular gravel, fine to coarse-grained subrounded sand, some silt.
LEAN CLAY (CL), reddish brown, moist, firm, low to medium plasticity, some silt and fine sand.
POORLY GRADED SAND (SP), reddish brown, moist, fine to medium-grained subrounded sand,
some coarser sand and fine gravel.
SILTY SAND (SM), reddish brown, moist, fine sand, few thin SP layers.
LEAN CLAY (CL), light brownish gray, moist, soft, medium plasticity, some fine sand and silt.
POORLY GRADED GRAVEL WITH SAND (GP), reddish brown, wet, fine subangular gravel, fine to
coarse-grained subrounded sand, some cobbles and clay present.
LEAN CLAY WITH SAND (CL), reddish brown, wet, soft to firm, medium plasticity, fine to
medium-grained subrounded sand, minor gravels, zones of clayey sand locally.
Silica Sand Pack
18'-30'
2" slotted (0.010
in) PVC Screen
20'-40'0.2
0.7
0.2
0.2
0.1
0.8
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 2 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-09-2024
WELL LOG NO. MW-5
Rockworth Companies
Driller: Cascade
Well Completed: 01-09-2024
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: 21st and 21st
B-14
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
20
25
30
35
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
100
100
100
100
RE
C
O
V
E
R
Y

(
%
)
40.0
LEAN CLAY WITH SAND (CL), reddish brown, wet, soft to firm, medium plasticity, fine to
medium-grained subrounded sand, minor gravels, zones of clayey sand locally.(continued)
Boring Terminated at 40 Feet
1.3
0.8
0.8
0.9
GR
A
P
H
I
C

L
O
G
See Exhibit 2LOCATION
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.
2105 South 2100 East
Salt Lake City, Utah, Utah
SITE:
Page 3 of 3
Advancement Method:
Sonic
Abandonment Method:
Hydrated Bentonite
Notes:
Project No.: 61197460
Drill Rig: Mini Sonic
Well Started: 01-09-2024
WELL LOG NO. MW-5
Rockworth Companies
Driller: Cascade
Well Completed: 01-09-2024
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: 21st and 21st
B-15
6949 S High Tech Dr Ste 100
Midvale, UT
MATERIAL DESCRIPTION
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

J
A
N
U
A
R
Y
2
0
2
2
_
D
R
I
L
L
L
O
G
S
.
G
P
J

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

1
/
2
5
/
2
4
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
DE
P
T
H

(
f
t
)
40
OV
A
/
P
I
D
(p
p
m
)
Groundwater encountered approximately 27 ft bgs.
WATER LEVEL OBSERVATIONS
100
RE
C
O
V
E
R
Y

(
%
)
Appendix D
Revised Site Management Plan Outline, February 17, 2022
Memo
TO: Dale Urban, Utah DWMRC, via email
FROM: Kitty Hiortdahl, Terracon Consultants
DATE: Thursday, February 17, 2022
RE:Revised Site Management Plan Outline per Wednesday February 9, 2022 meeting
21st & 21st Properties, NEC 2100 South & 2100 East
Salt Lake City, Salt Lake County, Utah
Terracon Project No. 61197460
The following memo captures Terracon’s understanding of the February 9, 2022 meeting with
representatives from the Division of Waste Management and Radiation Control (DWMRC) including Eric
Baiden, Brad Maulding and yourself, representatives from Terracon on behalf of Rockworth Companies
(site property owner) including Ben Bowers and myself. Terracon has expanded upon the discussion
held to compose an outline of a scope of work associated with the site management plan as discussed.
It is our understanding that once corrective action with controls is implemented (i.e., the Remedial
Action Plan (RAP) is implemented fully, a Site Management Plan (SMP) including a Vapor Intrusion
Mitigation System (VIMS) design is composed and approved, and environmental deed restrictions are
recorded), a letter acknowledging that corrective action has been completed can be issued by the
DWMRC. On-going monitoring will be encompassed as part of the SMP, which is performed post
corrective action.
It was established during our discussion that the purpose of groundwater monitoring in the SMP is to
measure the results of the remedial action performed, which consisted of removal of contaminated
soils. Source mass removal subsequently should result in less contaminant mass leaching into
groundwater, thereby, reducing and/or stabilizing groundwater concentrations at the site. Per our
discussion, groundwater monitoring is also to be employed to ensure offsite receptors are not
impacted by vapor intrusion.
Plan for monitoring in the SMP is proposed as follows:
Monitoring network; Analytical via EPA Method 8260 for Volatile Organic Compounds:
Onsite - 3 monitoring wells (existing MW-1, proposed MW-4 and MW-5)
o Install 2 additional monitoring wells in the assumed plume centerline
1 near/downgradient of the former Leavitts drycleaner sump
1 between the former Leavitts drycleaner and MW-1
Offsite - 2 wells (existing MW-2 and MW-3)
Monitoring wells will be completed to a depth of 35 feet and up to 45 feet below ground surface using
hollow stem auger to ensure the seasonally low water table is captured. Additional sampling may be
coupled with the above effort as part of the Leaking Underground Storage Tank (LUST) closure
regulated under the Division of Environmental Response and Remediation.
21st and 21st SMP Outline ■ Salt Lake City, UT
February 17, 2022 ■ Terracon Project No. 61197460
2
Sampling Duration is proposed as:
5 years of groundwater monitoring
o 1 year quarterly (4 sampling events)
o 2 years semiannual (4 sampling events)
o 2 years annual (2 sampling events)
Plume Stability Criteria and Contingency:
Once a stable and/or decreasing plume trend is established via an appropriate statistical
method, groundwater monitoring for remedial action performance will be considered achieved.
o Termination clause established for 8 data points early for statistical analysis
o Post the establishment of a stable and/or decreasing plume, monitoring wells will be
properly abandoned (if no longer in use by the LUST program)
If plume stability is not reached within the proposed 5-year timeframe, Terracon will determine
causation and perform appropriate actions, potentially including: additional investigation,
additional remedial actions, and/or abatement.
Offsite Vapor Intrusion monitoring and Contingency:
Offsite monitoring wells (MW-2 and MW-3) will be additionally monitored for vapor intrusion
o The SMP will detail Vapor Intrusion Screening Levels (VISL) applicable to the offsite
monitoring through utilizing the EPA VISL Calculator based on land use.
If offsite groundwater concentrations exceed the calculated threshold for appropriate land use
this will trigger 1) soil gas sampling; if soil gas sampling exceeds thresholds, 2) sub slab soil
gas sampling, to determine if the offsite plume is posing a vapor intrusion risk to offsite
properties.
If sub-slab sampling exceeds thresholds for vapor intrusion, 4 quarterly rounds of coupled sub
slab and indoor air sampling will be conducted. If during any sampling event indoor air exceeds
applicable thresholds and is verified by a coupled sub-slab point, emergency actions will be
taken (i.e. mobile air purifiers).
If consistent rounds of sampling demonstrate vapor intrusion occurring through coupled indoor
air and sub slab sampling, abatement actions will be taken as appropriate (i.e. sub slab
depressurization system installation).
Multiple lines of evidence, a robust conceptual site model, building conditions review, data review and
order of magnitude evaluations would be required for a full vapor intrusion investigation. These
details are not scoped in the SMP since offsite monitoring wells are currently below the EPA RSL for
vapor intrusion. It is not suspected that actions onsite will elevate groundwater concentration and
initiate the above contingencies; they are included based on discussion. A general outline of steps is
included in this memo for completeness of the receptor pathway accounting for all potential risk.
Additional stimulations of the SMP:
A VIMS design is under review by the DWMRC, and the construction completion of the VIMS will
be included in the SMP. It is assumed the VIMS will be installed per the design; if the installation
varies from the design, changes will be reviewed by the Professional Engineer and the DWMRC
prior to modification to ensure the protectiveness level is not affected by the modifications.
Environmental Deed Restrictions will be drafted and recorded as appropriate, in general they
will:
21st and 21st SMP Outline ■ Salt Lake City, UT
February 17, 2022 ■ Terracon Project No. 61197460
3
o Restrict groundwater use
o Restrict soil excavation where waste is left in place at the property boundary
o Restrict new development
Vapor Intrusion clause for new development: an assessment of potential need
for VIMS or other abetment actions for any new occupied spaces onsite.
o Annual notification requirement stating these stipulations have been meet and
maintained
Including a checklist for the VIMS competency, slab competency, and other
elements which might affect the integrity and protectiveness of the VIMS and/or
vapor mitigation pathway
If CR 10-4 or greater, and HQ of 1 or greater in onsite monitoring wells, Terracon
must prove that the VIMS is protective for this risk range:
Measure exhaust from pipes and sub-slab vapor (permanent points)
If sub-slab exceeds applicable thresholds, perform sub-slab sampling
coupled with indoor air sampling post a chemical inventory of the
occupied space:
o Analyze using EPA Method TO-15 for the “drycleaner” five
PCE, TCE, cis-DCE, 1,1-DCE, and VC
o Perform 4 quarters of sampling (first event includes installation)
for sub-slab sampling and indoor air sampling
o Clause for revision
If land change use or modifications are necessitated in the future the SMP shall
be revised as appropriate.
Appendix E
Well Development Forms
Appendix F
Monitoring Well Sampling Field Notes
Appendix G
Risk Evaluation Sheets
Output generated 05SEP2024:15:38:41
Site-specific 1
Resident Tap Water Inputs
Variable
Resident
Tap
Water
Default
Value
Site-Specific
Value
BW 0-2 (mutagenic body weight) kg 15 15
BW 2-6 (mutagenic body weight) kg 15 15
BW 6-16 (mutagenic body weight) kg 80 80
BW 16-26 (mutagenic body weight) kg 80 80
BW res-a (body weight - adult) kg 80 80
BW res-c (body weight - child) kg 15 15
DFW res-adj (age-adjusted dermal factor) cm 2-event/kg 2610650 2610650
DFWM res-adj (mutagenic age-adjusted dermal factor) cm 2-event/kg 8191633 8191633
EDres (exposure duration - resident) years 26 26
ED0-2 (mutagenic exposure duration first phase) years 2 2
ED2-6 (mutagenic exposure duration second phase) years 4 4
ED6-16 (mutagenic exposure duration third phase) years 10 10
ED16-26 (mutagenic exposure duration fourth phase) years 10 10
EDres-a (exposure duration - adult) years 20 20
EDres-c (exposure duration - child) years 6 6
EFres (exposure frequency) days/year 350 350
EF0-2 (mutagenic exposure frequency first phase) days/year 350 350
EF2-6 (mutagenic exposure frequency second phase) days/year 350 350
EF6-16 (mutagenic exposure frequency third phase) days/year 350 350
EF16-26 (mutagenic exposure frequency fourth phase) days/year 350 350
EFres-a (exposure frequency - adult) days/year 350 350
EFres-c (exposure frequency - child) days/year 350 350
ETres (exposure time) hours/day 24 24
ETevent-res-adj (age-adjusted exposure time) hours/event 0.67077 0.67077
ETevent-res-madj (mutagenic age-adjusted exposure time) hours/event 0.67077 0.67077
ET0-2 (mutagenic dermal exposure time first phase) hours/event 0.54 0.54
ET2-6 (mutagenic dermal exposure time second phase) hours/event 0.54 0.54
ET6-16 (mutagenic dermal exposure time third phase) hours/event 0.71 0.71
Output generated 05SEP2024:15:38:41
Site-specific 2
Resident Tap Water Inputs
Variable
Resident
Tap
Water
Default
Value
Site-Specific
Value
ET16-26 (mutagenic dermal exposure time fourth phase) hours/event 0.71 0.71
ETres-a (dermal exposure time - adult) hours/event 0.71 0.71
ETres-c (dermal exposure time - child) hours/event 0.54 0.54
ET0-2 (mutagenic inhalation exposure time first phase) hours/day 24 24
ET2-6 (mutagenic inhalation exposure time second phase) hours/day 24 24
ET6-16 (mutagenic inhalation exposure time third phase) hours/day 24 24
ET16-26 (mutagenic inhalation exposure time fourth phase) hours/day 24 24
ETres-a (inhalation exposure time - adult) hours/day 24 24
ETres-c (inhalation exposure time - child) hours/day 24 24
EV0-2 (mutagenic events) per day 1 1
EV2-6 (mutagenic events) per day 1 1
EV6-16 (mutagenic events) per day 1 1
EV16-26 (mutagenic events) per day 1 1
EVres-a (events - adult) per day 1 1
EVres-c (events - child) per day 1 1
THQ (target hazard quotient) unitless 0.1 1
IFW res-adj (adjusted intake factor) L/kg 327.95 327.95
IFWM res-adj (mutagenic adjusted intake factor) L/kg 1019.9 1019.9
IRW 0-2 (mutagenic water intake rate) L/day 0.78 0.78
IRW 2-6 (mutagenic water intake rate) L/day 0.78 0.78
IRW 6-16 (mutagenic water intake rate) L/day 2.5 2.5
IRW 16-26 (mutagenic water intake rate) L/day 2.5 2.5
IRW res-a (water intake rate - adult) L/day 2.5 2.5
IRW res-c (water intake rate - child) L/day 0.78 0.78
K (volatilization factor of Andelman) L/m 3 0.5 0.5
LT (lifetime) years 70 70
SA0-2 (mutagenic skin surface area) cm 2 6365 6365
SA2-6 (mutagenic skin surface area) cm 2 6365 6365
Output generated 05SEP2024:15:38:41
Site-specific 3
Resident Tap Water Inputs
Variable
Resident
Tap
Water
Default
Value
Site-Specific
Value
SA6-16 (mutagenic skin surface area) cm 2 19652 19652
SA16-26 (mutagenic skin surface area) cm 2 19652 19652
SAres-a (skin surface area - adult) cm 2 19652 19652
SAres-c (skin surface area - child) cm 2 6365 6365
lsc (apparent thickness of stratum corneum) cm 0.001 0.001
TR (target risk) unitless 1.0E-06 1.0E-06
Output generated 05SEP2024:15:38:41
Site-specific 4
Resident Risk-Based Regional Screening Levels (RSL) for Tap Water
Key: I = IRIS; P = PPRTV; O = OPP; A = ATSDR; T = ATSDR DRAFT; C = Cal EPA; X = PPRTV Screening Level; H = HEAST; D = OW; R = ORD; N = WI; W = TEF
applied; E = RPF applied; G = see user guide; U = user provided; ca = cancer; nc = noncancer; * = where: nc SL < 100X ca SL; ** = where nc SL < 10X ca SL;
SSL values are based on DAF=1; max = ceiling limit exceeded; sat = Csat exceeded.
Chemical
CAS
Number Mutagen?Volatile?
Chemical
Type
SFo(mg/kg-day)-1
SFoRef
IUR
(ug/m 3)-1
IUR
Ref
RfD
(mg/kg-day)
RfD
Ref
RfC
(mg/m 3)
RfC
Ref GIABS
Kp\
(cm/hr)
Chloroform 67-66-3 No Yes Organics 3.10E-02 C 2.30E-05 I 1.00E-02 I 1.95E-03 A 1 6.83E-03
Dichloroethylene, cis-1,2-156-59-2 No Yes Organics --2.00E-03 I 4.00E-02 X 1 1.10E-02
Tetrachloroethylene 127-18-4 No Yes Organics 2.10E-03 I 2.60E-07 I 6.00E-03 I 4.00E-02 I 1 3.34E-02
Trichloroethylene 79-01-6 Yes Yes Organics 4.60E-02 I 4.10E-06 I 5.00E-04 I 2.00E-03 I 1 1.16E-02
MW
B
(unitless)
t*
(hr)
τevent
(hr/event)
FA
(unitless)
In
EPD?DAevent (ca)
DAevent(nc child)
DAevent(nc adult)
MCL
(ug/L)
Ingestion
SL
TR=1E-06
(ug/L)
Dermal
SL
TR=1E-06
(ug/L)
Inhalation
SL
TR=1E-06
(ug/L)
Carcinogenic
SL
TR=1E-06
(ug/L)
119.38 2.87E-02 1.18E+00 4.90E-01 1 Yes 3.16E-04 2.46E-02 4.25E-02 8.00E+01 2.51E+00 2.92E+01 2.44E-01 2.21E-01
96.944 4.17E-02 8.81E-01 3.67E-01 1 Yes -4.92E-03 8.49E-03 7.00E+01 ----
165.83 1.65E-01 2.14E+00 8.92E-01 1 Yes 4.66E-03 1.47E-02 2.55E-02 5.00E+00 3.71E+01 6.53E+01 2.16E+01 1.13E+01
131.39 5.11E-02 1.37E+00 5.72E-01 1 Yes 1.48E-04 1.23E-03 2.12E-03 5.00E+00 1.18E+00 7.45E+00 9.57E-01 4.94E-01
Ingestion
SL
Child
THQ=1
(ug/L)
Dermal
SL
Child
THQ=1
(ug/L)
Inhalation
SL
Child
THQ=1
(ug/L)
Noncarcinogenic
SL
Child
THI=1
(ug/L)
Ingestion
SL
Adult
THQ=1
(ug/L)
Dermal
SL
Adult
THQ=1
(ug/L)
Inhalation
SL
Adult
THQ=1
(ug/L)
Noncarcinogenic
SL
Adult
THI=1
(ug/L)
Screening
Level
(ug/L)
2.01E+02 2.53E+03 4.07E+00 3.98E+00 3.34E+02 3.81E+03 4.07E+00 4.01E+00 2.21E-01 ca
4.01E+01 3.63E+02 8.34E+01 2.52E+01 6.67E+01 5.47E+02 8.34E+01 3.47E+01 2.52E+01 nc
1.20E+02 2.30E+02 8.34E+01 4.06E+01 2.00E+02 3.47E+02 8.34E+01 5.03E+01 1.13E+01 ca
1.00E+01 6.89E+01 4.17E+00 2.83E+00 1.67E+01 1.04E+02 4.17E+00 3.23E+00 4.94E-01 ca
Output generated 05SEP2024:15:38:41
Site-specific 5
Resident Risk for Tap Water
Chemical
SFo(mg/kg-day)-1
SFoRef
IUR
(ug/m 3)-1
IUR
Ref
RfD
(mg/kg-day)
RfD
Ref
RfC
(mg/m 3)
RfC
Ref GIABS
Kp\
(cm/hr)MW
B
(unitless)
t*
(hr)
τevent
(hr/event)
Chloroform 3.10E-02 C 2.30E-05 I 1.00E-02 I 1.95E-03 A 1 6.83E-03 119.38 2.87E-02 1.18E+00 4.90E-01
Dichloroethylene, cis-1,2---2.00E-03 I 4.00E-02 X 1 1.10E-02 96.944 4.17E-02 8.81E-01 3.67E-01
Tetrachloroethylene 2.10E-03 I 2.60E-07 I 6.00E-03 I 4.00E-02 I 1 3.34E-02 165.83 1.65E-01 2.14E+00 8.92E-01
Trichloroethylene 4.60E-02 I 4.10E-06 I 5.00E-04 I 2.00E-03 I 1 1.16E-02 131.39 5.11E-02 1.37E+00 5.72E-01
*Total Risk/HI ----------
FA
(unitless)
In
EPD?DAevent (ca)
DAevent(nc child)
DAevent(nc adult)
MCL
(ug/L)
Concentration
(ug/L)
Ingestion
Risk
Dermal
Risk
Inhalation
Risk
Carcinogenic
Risk
Ingestion
Child
HQ
Dermal
Child
HQ
1 Yes 3.16E-04 2.46E-02 4.25E-02 8.00E+01 9.72E-01 3.87E-07 3.33E-08 3.98E-06 4.40E-06 4.85E-03 3.84E-04
1 Yes -4.92E-03 8.49E-03 7.00E+01 2.59E-01 ----6.46E-03 7.13E-04
1 Yes 4.66E-03 1.47E-02 2.55E-02 5.00E+00 1.37E+02 3.69E-06 2.10E-06 6.34E-06 1.21E-05 1.14E+00 5.95E-01
1 Yes 1.48E-04 1.23E-03 2.12E-03 5.00E+00 4.11E+00 3.48E-06 5.52E-07 4.30E-06 8.32E-06 4.10E-01 5.96E-02
------7.56E-06 2.68E-06 1.46E-05 2.49E-05 1.56E+00 6.56E-01
Inhalation
Child
HQ
Noncarcinogenic
Child
HI
Ingestion
Adult
HQ
Dermal
Adult
HQ
Inhalation
Adult
HQ
Noncarcinogenic
Adult
HI
2.39E-01 2.44E-01 2.91E-03 2.55E-04 2.39E-01 2.42E-01
3.10E-03 1.03E-02 3.88E-03 4.73E-04 3.10E-03 7.46E-03
1.64E+00 3.38E+00 6.84E-01 3.95E-01 1.64E+00 2.72E+00
9.85E-01 1.45E+00 2.46E-01 3.96E-02 9.85E-01 1.27E+00
2.87E+00 5.09E+00 9.37E-01 4.36E-01 2.87E+00 4.24E+00
Appendix H
Chain of Custody and Laboratory Data Sheets
ANALYTICAL REPORT
July 03, 2024
Terracon - Salt Lake City, UT
Sample Delivery Group:L1750411
Samples Received:06/25/2024
Project Number:61197460 TASK 3
Description:21st and 21st
Report To:Andrew Turner
6949 South High Tech Drive
Midvale, UT 84047
Entire Report Reviewed By:
July 03, 2024
[Preliminary Report]
Chris Ward
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be
reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace
Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and
ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided,
and as the samples are received.
Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 mydata.pacelabs.com
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 1 of 23
July 03, 2024
Chris Ward
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 1 of 23
TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Sr: Sample Results 5
MW-1A L1750411-01 5
MW-2A L1750411-02 7
MW-3A L1750411-03 9
MW-4 L1750411-04 11
MW-5 L1750411-05 13
Qc: Quality Control Summary 15
Volatile Organic Compounds (GC/MS) by Method 8260B 15
Gl: Glossary of Terms 20
Al: Accreditations & Locations 21
Sc: Sample Chain of Custody 22
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 2 of 23
SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-1A L1750411-01 GW Steve Maliszeski 06/21/24 11:48 06/25/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2314646 1 06/29/24 17:28 06/29/24 17:28 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2316084 10 07/02/24 17:06 07/02/24 17:06 DYW Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2A L1750411-02 GW Steve Maliszeski 06/21/24 12:55 06/25/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2314646 1 06/29/24 17:47 06/29/24 17:47 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2316084 5 07/02/24 17:26 07/02/24 17:26 DYW Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3A L1750411-03 GW Steve Maliszeski 06/21/24 13:45 06/25/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2314646 1 06/29/24 18:06 06/29/24 18:06 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2316084 1 07/02/24 16:45 07/02/24 16:45 DYW Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1750411-04 GW Steve Maliszeski 06/21/24 09:50 06/25/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2314646 1 06/29/24 18:24 06/29/24 18:24 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2316084 10 07/02/24 17:47 07/02/24 17:47 DYW Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-5 L1750411-05 GW Steve Maliszeski 06/21/24 10:55 06/25/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2314646 1 06/29/24 18:43 06/29/24 18:43 DWR Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2316084 50 07/02/24 18:07 07/02/24 18:07 DYW Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 3 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct
temperature, in the proper containers, with the appropriate preservatives, and within method specified
holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental
samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality
Control are within established criteria except where addressed in this case narrative, a
non-conformance form or properly qualified within the sample results. By my digital signature below, I
affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the
potential to affect the quality of the data have been identified by the laboratory, and no information or
data have been knowingly withheld that would affect the quality of the data.
[Preliminary Report]
Chris Ward
Project Manager
Sample Delivery Group (SDG) Narrative
2-chloroethylvinyl ether degrades under acidic conditions. Associated results were performed from an acid-preserved sample. Compound
results not determined.
Batch Method Lab Sample ID
WG2314646 8260B L1750411-01, 02, 03, 04, 05
WG2316084 8260B L1750411-01, 02, 03, 04, 05
Volatile Organic Compounds (GC/MS) by Method 8260B
The associated batch QC was above the established quality control range for accuracy.
Batch Lab Sample ID Analytes
WG2314646 (LCS) R4089146-1, (LCSD)
R4089146-2, L1750411-01, 02, 03, 04,
05
2-Butanone (MEK), Acetone, Acrylonitrile and Methyl tert-butyl ether
The associated batch QC was outside the established quality control range for precision.
Batch Lab Sample ID Analytes
WG2314646 (LCSD) R4089146-2, L1750411-01, 02,
03, 04, 05
2-Butanone (MEK), Acetone, Acrolein and Bromomethane
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 4 of 23
Chris Ward
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 4 of 23
SAMPLE RESULTS - 01
L1750411
MW-1A
Collected date/time: 06/21/24 11:48
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Acetone U J3 J4 0.0113 0.0500 1 06/29/2024 17:28 WG2314646
Acrolein U J3 0.00254 0.0500 1 06/29/2024 17:28 WG2314646
Acrylonitrile U J4 0.000671 0.0100 1 06/29/2024 17:28 WG2314646
Benzene U 0.0000941 0.00100 1 06/29/2024 17:28 WG2314646
Bromobenzene U 0.000118 0.00100 1 06/29/2024 17:28 WG2314646
Bromodichloromethane U 0.000136 0.00100 1 06/29/2024 17:28 WG2314646
Bromoform U 0.000129 0.00100 1 06/29/2024 17:28 WG2314646
Bromomethane U J3 0.000605 0.00500 1 06/29/2024 17:28 WG2314646
n-Butylbenzene U 0.000157 0.00100 1 06/29/2024 17:28 WG2314646
sec-Butylbenzene U 0.000125 0.00100 1 06/29/2024 17:28 WG2314646
tert-Butylbenzene U 0.000127 0.00100 1 06/29/2024 17:28 WG2314646
Carbon tetrachloride U 0.000128 0.00100 1 06/29/2024 17:28 WG2314646
Chlorobenzene U 0.000116 0.00100 1 06/29/2024 17:28 WG2314646
Chlorodibromomethane U 0.000140 0.00100 1 06/29/2024 17:28 WG2314646
Chloroethane U 0.000192 0.00500 1 06/29/2024 17:28 WG2314646
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 06/29/2024 17:28 WG2314646
Chloroform 0.00135 J 0.000111 0.00500 1 06/29/2024 17:28 WG2314646
Chloromethane U 0.000960 0.00250 1 06/29/2024 17:28 WG2314646
2-Chlorotoluene U 0.000106 0.00100 1 06/29/2024 17:28 WG2314646
4-Chlorotoluene U 0.000114 0.00100 1 06/29/2024 17:28 WG2314646
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 06/29/2024 17:28 WG2314646
1,2-Dibromoethane U 0.000126 0.00100 1 06/29/2024 17:28 WG2314646
Dibromomethane U 0.000122 0.00100 1 06/29/2024 17:28 WG2314646
1,2-Dichlorobenzene U 0.000107 0.00100 1 06/29/2024 17:28 WG2314646
1,3-Dichlorobenzene U 0.000110 0.00100 1 06/29/2024 17:28 WG2314646
1,4-Dichlorobenzene U 0.000120 0.00100 1 06/29/2024 17:28 WG2314646
Dichlorodifluoromethane U 0.000374 0.00500 1 06/29/2024 17:28 WG2314646
1,1-Dichloroethane U 0.000100 0.00100 1 06/29/2024 17:28 WG2314646
1,2-Dichloroethane U 0.0000819 0.00100 1 06/29/2024 17:28 WG2314646
1,1-Dichloroethene U 0.000188 0.00100 1 06/29/2024 17:28 WG2314646
cis-1,2-Dichloroethene 0.000364 J 0.000126 0.00100 1 06/29/2024 17:28 WG2314646
trans-1,2-Dichloroethene U 0.000149 0.00100 1 06/29/2024 17:28 WG2314646
1,2-Dichloropropane U 0.000149 0.00100 1 06/29/2024 17:28 WG2314646
1,1-Dichloropropene U 0.000142 0.00100 1 06/29/2024 17:28 WG2314646
1,3-Dichloropropane U 0.000110 0.00100 1 06/29/2024 17:28 WG2314646
cis-1,3-Dichloropropene U 0.000111 0.00100 1 06/29/2024 17:28 WG2314646
trans-1,3-Dichloropropene U 0.000118 0.00100 1 06/29/2024 17:28 WG2314646
2,2-Dichloropropane U 0.000161 0.00100 1 06/29/2024 17:28 WG2314646
Di-isopropyl ether U 0.000105 0.00100 1 06/29/2024 17:28 WG2314646
Ethylbenzene U 0.000137 0.00100 1 06/29/2024 17:28 WG2314646
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 06/29/2024 17:28 WG2314646
Isopropylbenzene U 0.000105 0.00100 1 06/29/2024 17:28 WG2314646
p-Isopropyltoluene U 0.000120 0.00100 1 06/29/2024 17:28 WG2314646
2-Butanone (MEK)U J3 J4 0.00119 0.0100 1 06/29/2024 17:28 WG2314646
Methylene Chloride U 0.000430 0.00500 1 06/29/2024 17:28 WG2314646
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 06/29/2024 17:28 WG2314646
Methyl tert-butyl ether U J4 0.000101 0.00100 1 06/29/2024 17:28 WG2314646
Naphthalene U 0.00100 0.00500 1 06/29/2024 17:28 WG2314646
n-Propylbenzene U 0.0000993 0.00100 1 06/29/2024 17:28 WG2314646
Styrene U 0.000118 0.00100 1 06/29/2024 17:28 WG2314646
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 06/29/2024 17:28 WG2314646
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 06/29/2024 17:28 WG2314646
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 06/29/2024 17:28 WG2314646
Tetrachloroethene 0.274 0.00300 0.0100 10 07/02/2024 17:06 WG2316084
Toluene U 0.000278 0.00100 1 06/29/2024 17:28 WG2314646
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 06/29/2024 17:28 WG2314646
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 5 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 5 of 23
SAMPLE RESULTS - 01
L1750411
MW-1A
Collected date/time: 06/21/24 11:48
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
1,2,4-Trichlorobenzene U 0.000481 0.00100 1 06/29/2024 17:28 WG2314646
1,1,1-Trichloroethane U 0.000149 0.00100 1 06/29/2024 17:28 WG2314646
1,1,2-Trichloroethane U 0.000158 0.00100 1 06/29/2024 17:28 WG2314646
Trichloroethene 0.00123 0.000190 0.00100 1 06/29/2024 17:28 WG2314646
Trichlorofluoromethane U 0.000160 0.00500 1 06/29/2024 17:28 WG2314646
1,2,3-Trichloropropane U 0.000237 0.00250 1 06/29/2024 17:28 WG2314646
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 06/29/2024 17:28 WG2314646
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 17:28 WG2314646
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 17:28 WG2314646
Vinyl chloride U 0.000234 0.00100 1 06/29/2024 17:28 WG2314646
Xylenes, Total U 0.000174 0.00300 1 06/29/2024 17:28 WG2314646
(S) Toluene-d8 101 80.0-120 06/29/2024 17:28 WG2314646
(S) Toluene-d8 110 80.0-120 07/02/2024 17:06 WG2316084
(S) 4-Bromofluorobenzene 101 77.0-126 06/29/2024 17:28 WG2314646
(S) 4-Bromofluorobenzene 104 77.0-126 07/02/2024 17:06 WG2316084
(S) 1,2-Dichloroethane-d4 105 70.0-130 06/29/2024 17:28 WG2314646
(S) 1,2-Dichloroethane-d4 86.7 70.0-130 07/02/2024 17:06 WG2316084
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 6 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 6 of 23
SAMPLE RESULTS - 02
L1750411
MW-2A
Collected date/time: 06/21/24 12:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Acetone U J3 J4 0.0113 0.0500 1 06/29/2024 17:47 WG2314646
Acrolein U J3 0.00254 0.0500 1 06/29/2024 17:47 WG2314646
Acrylonitrile U J4 0.000671 0.0100 1 06/29/2024 17:47 WG2314646
Benzene U 0.0000941 0.00100 1 06/29/2024 17:47 WG2314646
Bromobenzene U 0.000118 0.00100 1 06/29/2024 17:47 WG2314646
Bromodichloromethane U 0.000136 0.00100 1 06/29/2024 17:47 WG2314646
Bromoform U 0.000129 0.00100 1 06/29/2024 17:47 WG2314646
Bromomethane U J3 0.000605 0.00500 1 06/29/2024 17:47 WG2314646
n-Butylbenzene U 0.000157 0.00100 1 06/29/2024 17:47 WG2314646
sec-Butylbenzene U 0.000125 0.00100 1 06/29/2024 17:47 WG2314646
tert-Butylbenzene U 0.000127 0.00100 1 06/29/2024 17:47 WG2314646
Carbon tetrachloride U 0.000128 0.00100 1 06/29/2024 17:47 WG2314646
Chlorobenzene U 0.000116 0.00100 1 06/29/2024 17:47 WG2314646
Chlorodibromomethane U 0.000140 0.00100 1 06/29/2024 17:47 WG2314646
Chloroethane U 0.000192 0.00500 1 06/29/2024 17:47 WG2314646
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 06/29/2024 17:47 WG2314646
Chloroform 0.000972 J 0.000111 0.00500 1 06/29/2024 17:47 WG2314646
Chloromethane U 0.000960 0.00250 1 06/29/2024 17:47 WG2314646
2-Chlorotoluene U 0.000106 0.00100 1 06/29/2024 17:47 WG2314646
4-Chlorotoluene U 0.000114 0.00100 1 06/29/2024 17:47 WG2314646
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 06/29/2024 17:47 WG2314646
1,2-Dibromoethane U 0.000126 0.00100 1 06/29/2024 17:47 WG2314646
Dibromomethane U 0.000122 0.00100 1 06/29/2024 17:47 WG2314646
1,2-Dichlorobenzene U 0.000107 0.00100 1 06/29/2024 17:47 WG2314646
1,3-Dichlorobenzene U 0.000110 0.00100 1 06/29/2024 17:47 WG2314646
1,4-Dichlorobenzene U 0.000120 0.00100 1 06/29/2024 17:47 WG2314646
Dichlorodifluoromethane U 0.000374 0.00500 1 06/29/2024 17:47 WG2314646
1,1-Dichloroethane U 0.000100 0.00100 1 06/29/2024 17:47 WG2314646
1,2-Dichloroethane U 0.0000819 0.00100 1 06/29/2024 17:47 WG2314646
1,1-Dichloroethene U 0.000188 0.00100 1 06/29/2024 17:47 WG2314646
cis-1,2-Dichloroethene 0.000259 J 0.000126 0.00100 1 06/29/2024 17:47 WG2314646
trans-1,2-Dichloroethene U 0.000149 0.00100 1 06/29/2024 17:47 WG2314646
1,2-Dichloropropane U 0.000149 0.00100 1 06/29/2024 17:47 WG2314646
1,1-Dichloropropene U 0.000142 0.00100 1 06/29/2024 17:47 WG2314646
1,3-Dichloropropane U 0.000110 0.00100 1 06/29/2024 17:47 WG2314646
cis-1,3-Dichloropropene U 0.000111 0.00100 1 06/29/2024 17:47 WG2314646
trans-1,3-Dichloropropene U 0.000118 0.00100 1 06/29/2024 17:47 WG2314646
2,2-Dichloropropane U 0.000161 0.00100 1 06/29/2024 17:47 WG2314646
Di-isopropyl ether U 0.000105 0.00100 1 06/29/2024 17:47 WG2314646
Ethylbenzene U 0.000137 0.00100 1 06/29/2024 17:47 WG2314646
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 06/29/2024 17:47 WG2314646
Isopropylbenzene U 0.000105 0.00100 1 06/29/2024 17:47 WG2314646
p-Isopropyltoluene U 0.000120 0.00100 1 06/29/2024 17:47 WG2314646
2-Butanone (MEK)U J3 J4 0.00119 0.0100 1 06/29/2024 17:47 WG2314646
Methylene Chloride U 0.000430 0.00500 1 06/29/2024 17:47 WG2314646
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 06/29/2024 17:47 WG2314646
Methyl tert-butyl ether U J4 0.000101 0.00100 1 06/29/2024 17:47 WG2314646
Naphthalene U 0.00100 0.00500 1 06/29/2024 17:47 WG2314646
n-Propylbenzene U 0.0000993 0.00100 1 06/29/2024 17:47 WG2314646
Styrene U 0.000118 0.00100 1 06/29/2024 17:47 WG2314646
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 06/29/2024 17:47 WG2314646
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 06/29/2024 17:47 WG2314646
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 06/29/2024 17:47 WG2314646
Tetrachloroethene 0.137 0.00150 0.00500 5 07/02/2024 17:26 WG2316084
Toluene U 0.000278 0.00100 1 06/29/2024 17:47 WG2314646
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 06/29/2024 17:47 WG2314646
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 7 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 7 of 23
SAMPLE RESULTS - 02
L1750411
MW-2A
Collected date/time: 06/21/24 12:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
1,2,4-Trichlorobenzene U 0.000481 0.00100 1 06/29/2024 17:47 WG2314646
1,1,1-Trichloroethane U 0.000149 0.00100 1 06/29/2024 17:47 WG2314646
1,1,2-Trichloroethane U 0.000158 0.00100 1 06/29/2024 17:47 WG2314646
Trichloroethene 0.00411 0.000190 0.00100 1 06/29/2024 17:47 WG2314646
Trichlorofluoromethane U 0.000160 0.00500 1 06/29/2024 17:47 WG2314646
1,2,3-Trichloropropane U 0.000237 0.00250 1 06/29/2024 17:47 WG2314646
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 06/29/2024 17:47 WG2314646
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 17:47 WG2314646
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 17:47 WG2314646
Vinyl chloride U 0.000234 0.00100 1 06/29/2024 17:47 WG2314646
Xylenes, Total U 0.000174 0.00300 1 06/29/2024 17:47 WG2314646
(S) Toluene-d8 101 80.0-120 06/29/2024 17:47 WG2314646
(S) Toluene-d8 108 80.0-120 07/02/2024 17:26 WG2316084
(S) 4-Bromofluorobenzene 99.7 77.0-126 06/29/2024 17:47 WG2314646
(S) 4-Bromofluorobenzene 103 77.0-126 07/02/2024 17:26 WG2316084
(S) 1,2-Dichloroethane-d4 109 70.0-130 06/29/2024 17:47 WG2314646
(S) 1,2-Dichloroethane-d4 87.1 70.0-130 07/02/2024 17:26 WG2316084
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 8 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 8 of 23
SAMPLE RESULTS - 03
L1750411
MW-3A
Collected date/time: 06/21/24 13:45
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Acetone U J3 J4 0.0113 0.0500 1 06/29/2024 18:06 WG2314646
Acrolein U J3 0.00254 0.0500 1 06/29/2024 18:06 WG2314646
Acrylonitrile U J4 0.000671 0.0100 1 06/29/2024 18:06 WG2314646
Benzene U 0.0000941 0.00100 1 06/29/2024 18:06 WG2314646
Bromobenzene U 0.000118 0.00100 1 06/29/2024 18:06 WG2314646
Bromodichloromethane U 0.000136 0.00100 1 06/29/2024 18:06 WG2314646
Bromoform U 0.000129 0.00100 1 06/29/2024 18:06 WG2314646
Bromomethane U J3 0.000605 0.00500 1 06/29/2024 18:06 WG2314646
n-Butylbenzene U 0.000157 0.00100 1 06/29/2024 18:06 WG2314646
sec-Butylbenzene U 0.000125 0.00100 1 06/29/2024 18:06 WG2314646
tert-Butylbenzene U 0.000127 0.00100 1 06/29/2024 18:06 WG2314646
Carbon tetrachloride U 0.000128 0.00100 1 06/29/2024 18:06 WG2314646
Chlorobenzene U 0.000116 0.00100 1 06/29/2024 18:06 WG2314646
Chlorodibromomethane U 0.000140 0.00100 1 06/29/2024 18:06 WG2314646
Chloroethane U 0.000192 0.00500 1 06/29/2024 18:06 WG2314646
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 06/29/2024 18:06 WG2314646
Chloroform 0.00134 J 0.000111 0.00500 1 06/29/2024 18:06 WG2314646
Chloromethane U 0.000960 0.00250 1 06/29/2024 18:06 WG2314646
2-Chlorotoluene U 0.000106 0.00100 1 06/29/2024 18:06 WG2314646
4-Chlorotoluene U 0.000114 0.00100 1 06/29/2024 18:06 WG2314646
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 06/29/2024 18:06 WG2314646
1,2-Dibromoethane U 0.000126 0.00100 1 06/29/2024 18:06 WG2314646
Dibromomethane U 0.000122 0.00100 1 06/29/2024 18:06 WG2314646
1,2-Dichlorobenzene U 0.000107 0.00100 1 06/29/2024 18:06 WG2314646
1,3-Dichlorobenzene U 0.000110 0.00100 1 06/29/2024 18:06 WG2314646
1,4-Dichlorobenzene U 0.000120 0.00100 1 06/29/2024 18:06 WG2314646
Dichlorodifluoromethane U 0.000374 0.00500 1 06/29/2024 18:06 WG2314646
1,1-Dichloroethane U 0.000100 0.00100 1 06/29/2024 18:06 WG2314646
1,2-Dichloroethane U 0.0000819 0.00100 1 06/29/2024 18:06 WG2314646
1,1-Dichloroethene U 0.000188 0.00100 1 06/29/2024 18:06 WG2314646
cis-1,2-Dichloroethene U 0.000126 0.00100 1 06/29/2024 18:06 WG2314646
trans-1,2-Dichloroethene U 0.000149 0.00100 1 06/29/2024 18:06 WG2314646
1,2-Dichloropropane U 0.000149 0.00100 1 06/29/2024 18:06 WG2314646
1,1-Dichloropropene U 0.000142 0.00100 1 06/29/2024 18:06 WG2314646
1,3-Dichloropropane U 0.000110 0.00100 1 06/29/2024 18:06 WG2314646
cis-1,3-Dichloropropene U 0.000111 0.00100 1 06/29/2024 18:06 WG2314646
trans-1,3-Dichloropropene U 0.000118 0.00100 1 06/29/2024 18:06 WG2314646
2,2-Dichloropropane U 0.000161 0.00100 1 06/29/2024 18:06 WG2314646
Di-isopropyl ether U 0.000105 0.00100 1 06/29/2024 18:06 WG2314646
Ethylbenzene U 0.000137 0.00100 1 06/29/2024 18:06 WG2314646
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 06/29/2024 18:06 WG2314646
Isopropylbenzene U 0.000105 0.00100 1 06/29/2024 18:06 WG2314646
p-Isopropyltoluene U 0.000120 0.00100 1 06/29/2024 18:06 WG2314646
2-Butanone (MEK)U J3 J4 0.00119 0.0100 1 06/29/2024 18:06 WG2314646
Methylene Chloride U 0.000430 0.00500 1 06/29/2024 18:06 WG2314646
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 06/29/2024 18:06 WG2314646
Methyl tert-butyl ether U J4 0.000101 0.00100 1 06/29/2024 18:06 WG2314646
Naphthalene U 0.00100 0.00500 1 06/29/2024 18:06 WG2314646
n-Propylbenzene U 0.0000993 0.00100 1 06/29/2024 18:06 WG2314646
Styrene U 0.000118 0.00100 1 06/29/2024 18:06 WG2314646
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 06/29/2024 18:06 WG2314646
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 06/29/2024 18:06 WG2314646
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 06/29/2024 18:06 WG2314646
Tetrachloroethene 0.00513 0.000300 0.00100 1 07/02/2024 16:45 WG2316084
Toluene U 0.000278 0.00100 1 06/29/2024 18:06 WG2314646
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 06/29/2024 18:06 WG2314646
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 9 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 9 of 23
SAMPLE RESULTS - 03
L1750411
MW-3A
Collected date/time: 06/21/24 13:45
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
1,2,4-Trichlorobenzene U 0.000481 0.00100 1 06/29/2024 18:06 WG2314646
1,1,1-Trichloroethane U 0.000149 0.00100 1 06/29/2024 18:06 WG2314646
1,1,2-Trichloroethane U 0.000158 0.00100 1 06/29/2024 18:06 WG2314646
Trichloroethene U 0.000190 0.00100 1 06/29/2024 18:06 WG2314646
Trichlorofluoromethane U 0.000160 0.00500 1 06/29/2024 18:06 WG2314646
1,2,3-Trichloropropane U 0.000237 0.00250 1 06/29/2024 18:06 WG2314646
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 06/29/2024 18:06 WG2314646
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:06 WG2314646
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:06 WG2314646
Vinyl chloride U 0.000234 0.00100 1 06/29/2024 18:06 WG2314646
Xylenes, Total U 0.000174 0.00300 1 06/29/2024 18:06 WG2314646
(S) Toluene-d8 101 80.0-120 06/29/2024 18:06 WG2314646
(S) Toluene-d8 109 80.0-120 07/02/2024 16:45 WG2316084
(S) 4-Bromofluorobenzene 98.5 77.0-126 06/29/2024 18:06 WG2314646
(S) 4-Bromofluorobenzene 106 77.0-126 07/02/2024 16:45 WG2316084
(S) 1,2-Dichloroethane-d4 108 70.0-130 06/29/2024 18:06 WG2314646
(S) 1,2-Dichloroethane-d4 86.3 70.0-130 07/02/2024 16:45 WG2316084
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 10 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 10 of 23
SAMPLE RESULTS - 04
L1750411
MW-4
Collected date/time: 06/21/24 09:50
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Acetone U J3 J4 0.0113 0.0500 1 06/29/2024 18:24 WG2314646
Acrolein U J3 0.00254 0.0500 1 06/29/2024 18:24 WG2314646
Acrylonitrile U J4 0.000671 0.0100 1 06/29/2024 18:24 WG2314646
Benzene U 0.0000941 0.00100 1 06/29/2024 18:24 WG2314646
Bromobenzene U 0.000118 0.00100 1 06/29/2024 18:24 WG2314646
Bromodichloromethane 0.000175 J 0.000136 0.00100 1 06/29/2024 18:24 WG2314646
Bromoform U 0.000129 0.00100 1 06/29/2024 18:24 WG2314646
Bromomethane U J3 0.000605 0.00500 1 06/29/2024 18:24 WG2314646
n-Butylbenzene U 0.000157 0.00100 1 06/29/2024 18:24 WG2314646
sec-Butylbenzene U 0.000125 0.00100 1 06/29/2024 18:24 WG2314646
tert-Butylbenzene U 0.000127 0.00100 1 06/29/2024 18:24 WG2314646
Carbon tetrachloride U 0.000128 0.00100 1 06/29/2024 18:24 WG2314646
Chlorobenzene U 0.000116 0.00100 1 06/29/2024 18:24 WG2314646
Chlorodibromomethane U 0.000140 0.00100 1 06/29/2024 18:24 WG2314646
Chloroethane U 0.000192 0.00500 1 06/29/2024 18:24 WG2314646
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 06/29/2024 18:24 WG2314646
Chloroform 0.00163 J 0.000111 0.00500 1 06/29/2024 18:24 WG2314646
Chloromethane U 0.000960 0.00250 1 06/29/2024 18:24 WG2314646
2-Chlorotoluene U 0.000106 0.00100 1 06/29/2024 18:24 WG2314646
4-Chlorotoluene U 0.000114 0.00100 1 06/29/2024 18:24 WG2314646
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 06/29/2024 18:24 WG2314646
1,2-Dibromoethane U 0.000126 0.00100 1 06/29/2024 18:24 WG2314646
Dibromomethane U 0.000122 0.00100 1 06/29/2024 18:24 WG2314646
1,2-Dichlorobenzene U 0.000107 0.00100 1 06/29/2024 18:24 WG2314646
1,3-Dichlorobenzene U 0.000110 0.00100 1 06/29/2024 18:24 WG2314646
1,4-Dichlorobenzene U 0.000120 0.00100 1 06/29/2024 18:24 WG2314646
Dichlorodifluoromethane U 0.000374 0.00500 1 06/29/2024 18:24 WG2314646
1,1-Dichloroethane U 0.000100 0.00100 1 06/29/2024 18:24 WG2314646
1,2-Dichloroethane U 0.0000819 0.00100 1 06/29/2024 18:24 WG2314646
1,1-Dichloroethene U 0.000188 0.00100 1 06/29/2024 18:24 WG2314646
cis-1,2-Dichloroethene U 0.000126 0.00100 1 06/29/2024 18:24 WG2314646
trans-1,2-Dichloroethene U 0.000149 0.00100 1 06/29/2024 18:24 WG2314646
1,2-Dichloropropane U 0.000149 0.00100 1 06/29/2024 18:24 WG2314646
1,1-Dichloropropene U 0.000142 0.00100 1 06/29/2024 18:24 WG2314646
1,3-Dichloropropane U 0.000110 0.00100 1 06/29/2024 18:24 WG2314646
cis-1,3-Dichloropropene U 0.000111 0.00100 1 06/29/2024 18:24 WG2314646
trans-1,3-Dichloropropene U 0.000118 0.00100 1 06/29/2024 18:24 WG2314646
2,2-Dichloropropane U 0.000161 0.00100 1 06/29/2024 18:24 WG2314646
Di-isopropyl ether U 0.000105 0.00100 1 06/29/2024 18:24 WG2314646
Ethylbenzene U 0.000137 0.00100 1 06/29/2024 18:24 WG2314646
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 06/29/2024 18:24 WG2314646
Isopropylbenzene U 0.000105 0.00100 1 06/29/2024 18:24 WG2314646
p-Isopropyltoluene U 0.000120 0.00100 1 06/29/2024 18:24 WG2314646
2-Butanone (MEK)U J3 J4 0.00119 0.0100 1 06/29/2024 18:24 WG2314646
Methylene Chloride U 0.000430 0.00500 1 06/29/2024 18:24 WG2314646
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 06/29/2024 18:24 WG2314646
Methyl tert-butyl ether U J4 0.000101 0.00100 1 06/29/2024 18:24 WG2314646
Naphthalene U 0.00100 0.00500 1 06/29/2024 18:24 WG2314646
n-Propylbenzene U 0.0000993 0.00100 1 06/29/2024 18:24 WG2314646
Styrene U 0.000118 0.00100 1 06/29/2024 18:24 WG2314646
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 06/29/2024 18:24 WG2314646
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 06/29/2024 18:24 WG2314646
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 06/29/2024 18:24 WG2314646
Tetrachloroethene 0.403 0.00300 0.0100 10 07/02/2024 17:47 WG2316084
Toluene U 0.000278 0.00100 1 06/29/2024 18:24 WG2314646
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 06/29/2024 18:24 WG2314646
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 11 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 11 of 23
SAMPLE RESULTS - 04
L1750411
MW-4
Collected date/time: 06/21/24 09:50
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
1,2,4-Trichlorobenzene U 0.000481 0.00100 1 06/29/2024 18:24 WG2314646
1,1,1-Trichloroethane U 0.000149 0.00100 1 06/29/2024 18:24 WG2314646
1,1,2-Trichloroethane U 0.000158 0.00100 1 06/29/2024 18:24 WG2314646
Trichloroethene U 0.000190 0.00100 1 06/29/2024 18:24 WG2314646
Trichlorofluoromethane U 0.000160 0.00500 1 06/29/2024 18:24 WG2314646
1,2,3-Trichloropropane U 0.000237 0.00250 1 06/29/2024 18:24 WG2314646
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 06/29/2024 18:24 WG2314646
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:24 WG2314646
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:24 WG2314646
Vinyl chloride U 0.000234 0.00100 1 06/29/2024 18:24 WG2314646
Xylenes, Total U 0.000174 0.00300 1 06/29/2024 18:24 WG2314646
(S) Toluene-d8 99.6 80.0-120 06/29/2024 18:24 WG2314646
(S) Toluene-d8 109 80.0-120 07/02/2024 17:47 WG2316084
(S) 4-Bromofluorobenzene 97.9 77.0-126 06/29/2024 18:24 WG2314646
(S) 4-Bromofluorobenzene 106 77.0-126 07/02/2024 17:47 WG2316084
(S) 1,2-Dichloroethane-d4 110 70.0-130 06/29/2024 18:24 WG2314646
(S) 1,2-Dichloroethane-d4 88.8 70.0-130 07/02/2024 17:47 WG2316084
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 12 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 12 of 23
SAMPLE RESULTS - 05
L1750411
MW-5
Collected date/time: 06/21/24 10:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Acetone U J3 J4 0.0113 0.0500 1 06/29/2024 18:43 WG2314646
Acrolein U J3 0.00254 0.0500 1 06/29/2024 18:43 WG2314646
Acrylonitrile U J4 0.000671 0.0100 1 06/29/2024 18:43 WG2314646
Benzene U 0.0000941 0.00100 1 06/29/2024 18:43 WG2314646
Bromobenzene U 0.000118 0.00100 1 06/29/2024 18:43 WG2314646
Bromodichloromethane 0.000185 J 0.000136 0.00100 1 06/29/2024 18:43 WG2314646
Bromoform U 0.000129 0.00100 1 06/29/2024 18:43 WG2314646
Bromomethane U J3 0.000605 0.00500 1 06/29/2024 18:43 WG2314646
n-Butylbenzene U 0.000157 0.00100 1 06/29/2024 18:43 WG2314646
sec-Butylbenzene U 0.000125 0.00100 1 06/29/2024 18:43 WG2314646
tert-Butylbenzene U 0.000127 0.00100 1 06/29/2024 18:43 WG2314646
Carbon tetrachloride U 0.000128 0.00100 1 06/29/2024 18:43 WG2314646
Chlorobenzene U 0.000116 0.00100 1 06/29/2024 18:43 WG2314646
Chlorodibromomethane U 0.000140 0.00100 1 06/29/2024 18:43 WG2314646
Chloroethane U 0.000192 0.00500 1 06/29/2024 18:43 WG2314646
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 06/29/2024 18:43 WG2314646
Chloroform 0.00171 J 0.000111 0.00500 1 06/29/2024 18:43 WG2314646
Chloromethane U 0.000960 0.00250 1 06/29/2024 18:43 WG2314646
2-Chlorotoluene U 0.000106 0.00100 1 06/29/2024 18:43 WG2314646
4-Chlorotoluene U 0.000114 0.00100 1 06/29/2024 18:43 WG2314646
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 06/29/2024 18:43 WG2314646
1,2-Dibromoethane U 0.000126 0.00100 1 06/29/2024 18:43 WG2314646
Dibromomethane U 0.000122 0.00100 1 06/29/2024 18:43 WG2314646
1,2-Dichlorobenzene U 0.000107 0.00100 1 06/29/2024 18:43 WG2314646
1,3-Dichlorobenzene U 0.000110 0.00100 1 06/29/2024 18:43 WG2314646
1,4-Dichlorobenzene U 0.000120 0.00100 1 06/29/2024 18:43 WG2314646
Dichlorodifluoromethane U 0.000374 0.00500 1 06/29/2024 18:43 WG2314646
1,1-Dichloroethane U 0.000100 0.00100 1 06/29/2024 18:43 WG2314646
1,2-Dichloroethane U 0.0000819 0.00100 1 06/29/2024 18:43 WG2314646
1,1-Dichloroethene U 0.000188 0.00100 1 06/29/2024 18:43 WG2314646
cis-1,2-Dichloroethene 0.000313 J 0.000126 0.00100 1 06/29/2024 18:43 WG2314646
trans-1,2-Dichloroethene U 0.000149 0.00100 1 06/29/2024 18:43 WG2314646
1,2-Dichloropropane U 0.000149 0.00100 1 06/29/2024 18:43 WG2314646
1,1-Dichloropropene U 0.000142 0.00100 1 06/29/2024 18:43 WG2314646
1,3-Dichloropropane U 0.000110 0.00100 1 06/29/2024 18:43 WG2314646
cis-1,3-Dichloropropene U 0.000111 0.00100 1 06/29/2024 18:43 WG2314646
trans-1,3-Dichloropropene U 0.000118 0.00100 1 06/29/2024 18:43 WG2314646
2,2-Dichloropropane U 0.000161 0.00100 1 06/29/2024 18:43 WG2314646
Di-isopropyl ether U 0.000105 0.00100 1 06/29/2024 18:43 WG2314646
Ethylbenzene U 0.000137 0.00100 1 06/29/2024 18:43 WG2314646
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 06/29/2024 18:43 WG2314646
Isopropylbenzene U 0.000105 0.00100 1 06/29/2024 18:43 WG2314646
p-Isopropyltoluene U 0.000120 0.00100 1 06/29/2024 18:43 WG2314646
2-Butanone (MEK)U J3 J4 0.00119 0.0100 1 06/29/2024 18:43 WG2314646
Methylene Chloride U 0.000430 0.00500 1 06/29/2024 18:43 WG2314646
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 06/29/2024 18:43 WG2314646
Methyl tert-butyl ether U J4 0.000101 0.00100 1 06/29/2024 18:43 WG2314646
Naphthalene U 0.00100 0.00500 1 06/29/2024 18:43 WG2314646
n-Propylbenzene U 0.0000993 0.00100 1 06/29/2024 18:43 WG2314646
Styrene U 0.000118 0.00100 1 06/29/2024 18:43 WG2314646
1,1,1,2-Tetrachloroethane 0.00251 0.000147 0.00100 1 06/29/2024 18:43 WG2314646
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 06/29/2024 18:43 WG2314646
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 06/29/2024 18:43 WG2314646
Tetrachloroethene 2.99 0.0150 0.0500 50 07/02/2024 18:07 WG2316084
Toluene U 0.000278 0.00100 1 06/29/2024 18:43 WG2314646
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 06/29/2024 18:43 WG2314646
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 13 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 13 of 23
SAMPLE RESULTS - 05
L1750411
MW-5
Collected date/time: 06/21/24 10:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
1,2,4-Trichlorobenzene U 0.000481 0.00100 1 06/29/2024 18:43 WG2314646
1,1,1-Trichloroethane U 0.000149 0.00100 1 06/29/2024 18:43 WG2314646
1,1,2-Trichloroethane U 0.000158 0.00100 1 06/29/2024 18:43 WG2314646
Trichloroethene 0.00165 0.000190 0.00100 1 06/29/2024 18:43 WG2314646
Trichlorofluoromethane U 0.000160 0.00500 1 06/29/2024 18:43 WG2314646
1,2,3-Trichloropropane U 0.000237 0.00250 1 06/29/2024 18:43 WG2314646
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 06/29/2024 18:43 WG2314646
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:43 WG2314646
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 06/29/2024 18:43 WG2314646
Vinyl chloride U 0.000234 0.00100 1 06/29/2024 18:43 WG2314646
Xylenes, Total U 0.000174 0.00300 1 06/29/2024 18:43 WG2314646
(S) Toluene-d8 99.0 80.0-120 06/29/2024 18:43 WG2314646
(S) Toluene-d8 109 80.0-120 07/02/2024 18:07 WG2316084
(S) 4-Bromofluorobenzene 96.4 77.0-126 06/29/2024 18:43 WG2314646
(S) 4-Bromofluorobenzene 104 77.0-126 07/02/2024 18:07 WG2316084
(S) 1,2-Dichloroethane-d4 97.6 70.0-130 06/29/2024 18:43 WG2314646
(S) 1,2-Dichloroethane-d4 88.5 70.0-130 07/02/2024 18:07 WG2316084
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 14 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 14 of 23
QUALITY CONTROL SUMMARYWG2314646
Volatile Organic Compounds (GC/MS) by Method 8260B L1750411-01,02,03,04,05
Method Blank (MB)
(MB) R4089146-3 06/29/24 14:04
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Acetone U 0.0113 0.0500
Acrolein U 0.00254 0.0500
Acrylonitrile U 0.000671 0.0100
Benzene U 0.0000941 0.00100
Bromobenzene U 0.000118 0.00100
Bromodichloromethane U 0.000136 0.00100
Bromoform U 0.000129 0.00100
Bromomethane U 0.000605 0.00500
n-Butylbenzene U 0.000157 0.00100
sec-Butylbenzene U 0.000125 0.00100
tert-Butylbenzene U 0.000127 0.00100
Carbon tetrachloride U 0.000128 0.00100
Chlorobenzene U 0.000116 0.00100
Chlorodibromomethane U 0.000140 0.00100
Chloroethane U 0.000192 0.00500
2-Chloroethyl vinyl ether U 0.000575 0.0500
Chloroform U 0.000111 0.00500
Chloromethane U 0.000960 0.00250
2-Chlorotoluene U 0.000106 0.00100
4-Chlorotoluene U 0.000114 0.00100
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500
1,2-Dibromoethane U 0.000126 0.00100
Dibromomethane U 0.000122 0.00100
1,2-Dichlorobenzene U 0.000107 0.00100
1,3-Dichlorobenzene U 0.000110 0.00100
1,4-Dichlorobenzene U 0.000120 0.00100
Dichlorodifluoromethane U 0.000374 0.00500
1,1-Dichloroethane U 0.000100 0.00100
1,2-Dichloroethane U 0.0000819 0.00100
1,1-Dichloroethene U 0.000188 0.00100
cis-1,2-Dichloroethene U 0.000126 0.00100
trans-1,2-Dichloroethene U 0.000149 0.00100
1,2-Dichloropropane U 0.000149 0.00100
1,1-Dichloropropene U 0.000142 0.00100
1,3-Dichloropropane U 0.000110 0.00100
cis-1,3-Dichloropropene U 0.000111 0.00100
trans-1,3-Dichloropropene U 0.000118 0.00100
2,2-Dichloropropane U 0.000161 0.00100
Di-isopropyl ether U 0.000105 0.00100
Ethylbenzene U 0.000137 0.00100
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 15 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 15 of 23
QUALITY CONTROL SUMMARYWG2314646
Volatile Organic Compounds (GC/MS) by Method 8260B L1750411-01,02,03,04,05
Method Blank (MB)
(MB) R4089146-3 06/29/24 14:04
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Hexachloro-1,3-butadiene U 0.000337 0.00100
Isopropylbenzene U 0.000105 0.00100
p-Isopropyltoluene U 0.000120 0.00100
2-Butanone (MEK)U 0.00119 0.0100
Methylene Chloride U 0.000430 0.00500
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100
Methyl tert-butyl ether U 0.000101 0.00100
Naphthalene U 0.00100 0.00500
n-Propylbenzene U 0.0000993 0.00100
Styrene U 0.000118 0.00100
1,1,1,2-Tetrachloroethane U 0.000147 0.00100
1,1,2,2-Tetrachloroethane U 0.000133 0.00100
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100
Toluene U 0.000278 0.00100
1,2,3-Trichlorobenzene U 0.000230 0.00100
1,2,4-Trichlorobenzene U 0.000481 0.00100
1,1,1-Trichloroethane U 0.000149 0.00100
1,1,2-Trichloroethane U 0.000158 0.00100
Trichloroethene U 0.000190 0.00100
Trichlorofluoromethane U 0.000160 0.00500
1,2,3-Trichloropropane U 0.000237 0.00250
1,2,4-Trimethylbenzene U 0.000322 0.00100
1,2,3-Trimethylbenzene U 0.000104 0.00100
1,3,5-Trimethylbenzene U 0.000104 0.00100
Vinyl chloride U 0.000234 0.00100
Xylenes, Total U 0.000174 0.00300
(S) Toluene-d8 102 80.0-120
(S) 4-Bromofluorobenzene 98.0 77.0-126
(S) 1,2-Dichloroethane-d4 106 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4089146-1 06/29/24 13:02 • (LCSD) R4089146-2 06/29/24 13:26
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Acetone 0.0250 0.0303 0.0409 121 164 19.0-160 J J J3 J4 29.8 27
Acrolein 0.0250 0.00430 0.00751 17.2 30.0 10.0-160 J J J3 54.4 26
Acrylonitrile 0.0250 0.0481 0.0519 192 208 55.0-149 J4 J4 7.60 20
Benzene 0.00500 0.00534 0.00509 107 102 70.0-123 4.79 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:13 16 of 23
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 TASK 3 L1750411 07/03/24 12:57 16 of 23
QUALITY CONTROL SUMMARYWG2314646
Volatile Organic Compounds (GC/MS) by Method 8260B L1750411-01,02,03,04,05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4089146-1 06/29/24 13:02 • (LCSD) R4089146-2 06/29/24 13:26
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Bromobenzene 0.00500 0.00465 0.00447 93.0 89.4 73.0-121 3.95 20
Bromodichloromethane 0.00500 0.00516 0.00494 103 98.8 75.0-120 4.36 20
Bromoform 0.00500 0.00461 0.00447 92.2 89.4 68.0-132 3.08 20
Bromomethane 0.00500 0.00554 0.00403 111 80.6 10.0-160 J J3 31.6 25
n-Butylbenzene 0.00500 0.00436 0.00431 87.2 86.2 73.0-125 1.15 20
sec-Butylbenzene 0.00500 0.00507 0.00482 101 96.4 75.0-125 5.06 20
tert-Butylbenzene 0.00500 0.00457 0.00424 91.4 84.8 76.0-124 7.49 20
Carbon tetrachloride 0.00500 0.00523 0.00476 105 95.2 68.0-126 9.41 20
Chlorobenzene 0.00500 0.00486 0.00458 97.2 91.6 80.0-121 5.93 20
Chlorodibromomethane 0.00500 0.00525 0.00485 105 97.0 77.0-125 7.92 20
Chloroethane 0.00500 0.00457 0.00423 91.4 84.6 47.0-150 J J 7.73 20
2-Chloroethyl vinyl ether 0.0250 0.0302 0.0281 121 112 51.0-160 J J 7.20 20
Chloroform 0.00500 0.00503 0.00468 101 93.6 73.0-120 J 7.21 20
Chloromethane 0.00500 0.00426 0.00439 85.2 87.8 41.0-142 3.01 20
2-Chlorotoluene 0.00500 0.00476 0.00453 95.2 90.6 76.0-123 4.95 20
4-Chlorotoluene 0.00500 0.00492 0.00459 98.4 91.8 75.0-122 6.94 20
1,2-Dibromo-3-Chloropropane 0.00500 0.00602 0.00597 120 119 58.0-134 0.834 20
1,2-Dibromoethane 0.00500 0.00553 0.00519 111 104 80.0-122 6.34 20
Dibromomethane 0.00500 0.00587 0.00577 117 115 80.0-120 1.72 20
1,2-Dichlorobenzene 0.00500 0.00501 0.00482 100 96.4 79.0-121 3.87 20
1,3-Dichlorobenzene 0.00500 0.00479 0.00451 95.8 90.2 79.0-120 6.02 20
1,4-Dichlorobenzene 0.00500 0.00485 0.00434 97.0 86.8 79.0-120 11.1 20
Dichlorodifluoromethane 0.00500 0.00453 0.00416 90.6 83.2 51.0-149 J J 8.52 20
1,1-Dichloroethane 0.00500 0.00550 0.00531 110 106 70.0-126 3.52 20
1,2-Dichloroethane 0.00500 0.00517 0.00507 103 101 70.0-128 1.95 20
1,1-Dichloroethene 0.00500 0.00458 0.00430 91.6 86.0 71.0-124 6.31 20
cis-1,2-Dichloroethene 0.00500 0.00550 0.00516 110 103 73.0-120 6.38 20
trans-1,2-Dichloroethene 0.00500 0.00495 0.00495 99.0 99.0 73.0-120 0.000 20
1,2-Dichloropropane 0.00500 0.00571 0.00565 114 113 77.0-125 1.06 20
1,1-Dichloropropene 0.00500 0.00470 0.00449 94.0 89.8 74.0-126 4.57 20
1,3-Dichloropropane 0.00500 0.00537 0.00487 107 97.4 80.0-120 9.77 20
cis-1,3-Dichloropropene 0.00500 0.00470 0.00446 94.0 89.2 80.0-123 5.24 20
trans-1,3-Dichloropropene 0.00500 0.00455 0.00433 91.0 86.6 78.0-124 4.95 20
2,2-Dichloropropane 0.00500 0.00464 0.00433 92.8 86.6 58.0-130 6.91 20
Di-isopropyl ether 0.00500 0.00586 0.00559 117 112 58.0-138 4.72 20
Ethylbenzene 0.00500 0.00498 0.00462 99.6 92.4 79.0-123 7.50 20
Hexachloro-1,3-butadiene 0.00500 0.00446 0.00444 89.2 88.8 54.0-138 0.449 20
Isopropylbenzene 0.00500 0.00502 0.00471 100 94.2 76.0-127 6.37 20
p-Isopropyltoluene 0.00500 0.00490 0.00462 98.0 92.4 76.0-125 5.88 20
2-Butanone (MEK)0.0250 0.0305 0.0410 122 164 44.0-160 J3 J4 29.4 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2314646
Volatile Organic Compounds (GC/MS) by Method 8260B L1750411-01,02,03,04,05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4089146-1 06/29/24 13:02 • (LCSD) R4089146-2 06/29/24 13:26
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Methylene Chloride 0.00500 0.00482 0.00477 96.4 95.4 67.0-120 J J 1.04 20
4-Methyl-2-pentanone (MIBK)0.0250 0.0356 0.0353 142 141 68.0-142 0.846 20
Methyl tert-butyl ether 0.00500 0.00701 0.00689 140 138 68.0-125 J4 J4 1.73 20
Naphthalene 0.00500 0.00535 0.00551 107 110 54.0-135 2.95 20
n-Propylbenzene 0.00500 0.00508 0.00473 102 94.6 77.0-124 7.14 20
Styrene 0.00500 0.00492 0.00465 98.4 93.0 73.0-130 5.64 20
1,1,1,2-Tetrachloroethane 0.00500 0.00519 0.00506 104 101 75.0-125 2.54 20
1,1,2,2-Tetrachloroethane 0.00500 0.00540 0.00541 108 108 65.0-130 0.185 20
1,1,2-Trichlorotrifluoroethane 0.00500 0.00409 0.00389 81.8 77.8 69.0-132 5.01 20
Toluene 0.00500 0.00514 0.00460 103 92.0 79.0-120 11.1 20
1,2,3-Trichlorobenzene 0.00500 0.00502 0.00532 100 106 50.0-138 5.80 20
1,2,4-Trichlorobenzene 0.00500 0.00490 0.00476 98.0 95.2 57.0-137 2.90 20
1,1,1-Trichloroethane 0.00500 0.00506 0.00483 101 96.6 73.0-124 4.65 20
1,1,2-Trichloroethane 0.00500 0.00576 0.00539 115 108 80.0-120 6.64 20
Trichloroethene 0.00500 0.00504 0.00494 101 98.8 78.0-124 2.00 20
Trichlorofluoromethane 0.00500 0.00437 0.00422 87.4 84.4 59.0-147 J J 3.49 20
1,2,3-Trichloropropane 0.00500 0.00604 0.00542 121 108 73.0-130 10.8 20
1,2,4-Trimethylbenzene 0.00500 0.00478 0.00463 95.6 92.6 76.0-121 3.19 20
1,2,3-Trimethylbenzene 0.00500 0.00510 0.00488 102 97.6 77.0-120 4.41 20
1,3,5-Trimethylbenzene 0.00500 0.00479 0.00451 95.8 90.2 76.0-122 6.02 20
Vinyl chloride 0.00500 0.00482 0.00444 96.4 88.8 67.0-131 8.21 20
Xylenes, Total 0.0150 0.0147 0.0141 98.0 94.0 79.0-123 4.17 20
(S) Toluene-d8 99.7 101 80.0-120
(S) 4-Bromofluorobenzene 102 99.9 77.0-126
(S) 1,2-Dichloroethane-d4 104 108 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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QUALITY CONTROL SUMMARYWG2316084
Volatile Organic Compounds (GC/MS) by Method 8260B L1750411-01,02,03,04,05
Method Blank (MB)
(MB) R4089567-3 07/02/24 15:43
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Tetrachloroethene U 0.000300 0.00100
(S) Toluene-d8 110 80.0-120
(S) 4-Bromofluorobenzene 106 77.0-126
(S) 1,2-Dichloroethane-d4 85.6 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4089567-1 07/02/24 14:40 • (LCSD) R4089567-2 07/02/24 15:01
Spike Amount LCS Result LCSD Result LCS Rec.LCSD Rec.Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits
Analyte mg/l mg/l mg/l %%%%%
Tetrachloroethene 0.00500 0.00551 0.00530 110 106 72.0-132 3.89 20
(S) Toluene-d8 109 108 80.0-120
(S) 4-Bromofluorobenzene 107 108 77.0-126
(S) 1,2-Dichloroethane-d4 86.1 86.8 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report
The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not
intended as a comprehensive explanation, and if you have additional questions please contact your project representative.
Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name,
Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and
Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.
Abbreviations and Definitions
MDL Method Detection Limit.
RDL Reported Detection Limit.
Rec.Recovery.
RPD Relative Percent Difference.
SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and
Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be
detected in all environmental media.
U Not detected at the Reporting Limit (or MDL where applicable).
Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes
reported.
Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the
standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the
laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the
result reported has already been corrected for this factor.
Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal
for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or
duplicated within these ranges.
Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result
reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and
potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.
Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was
no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL”
(Below Detectable Levels). The information in the results column should always be accompanied by either an MDL
(Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect
or report for this analyte.
Uncertainty
(Radiochemistry)Confidence level of 2 sigma.
Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol
observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will
be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.
Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or
analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not
being performed on your samples typically, but on laboratory generated material.
Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and
date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This
chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the
samples from the time of collection until delivery to the laboratory for analysis.
Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided
by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for
each sample will provide the name and method number for the analysis reported.
Sample Summary (Ss)This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and
times of preparation and/or analysis.
Qualifier Description
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.
J4 The associated batch QC was outside the established quality control range for accuracy.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹DW21704
Georgia NELAP North Carolina ³41
Georgia ¹923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶KY90010 South Carolina 84004002
Kentucky ²16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003
ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable
* Not all certifications held by the laboratory are applicable to the results reported in the attached report.
* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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