DERR-2024-008348

Deq submit <[e-mail]>
Updated Well Installation and Groundwater Monitoring Report, 21st and 21st
Properties, Salt Lake City, Utah
1 message
Turner, Andrew S <[e-mail]>Wed, Jun 12, 2024 at 4:04 PM
To: "[e-mail]" <[e-mail]>
Cc: Ethan Upton <[e-mail]>
Please see attached report. Thank you.
Andrew S. Turner, PG
Project Manager – Environmental Services
6952 S. High Tech Dr. Suite B I Midvale, UT 84047
D [phone] I F [phone] I M [phone]
[e-mail] I Terracon.com
Terracon provides environmental, facilities, geotechnical, and materials consulting engineering services delivered with
responsiveness, resourcefulness, and reliability.
Private and confidential as detailed here (www.terracon.com/disclaimer). If you cannot access the hyperlink, please e-mail
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21st and 21st Quarterly Groundwater Monitoring Report_Updated - signed.pdf
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6/13/24, 3:06 PM State of Utah Mail - Updated Well Installation and Groundwater Monitoring Report, 21st and 21st Properties, Salt Lake City, Utah
https://mail.google.com/mail/b/AEoRXRQICE_IaaXDbsS7w6E0Bv5Q_CY1WHRpvQqoJYOKu0RwIerU/u/0/?ik=adf9d5e615&view=pt&search=all&per…1/1
DSHW-2024-006739
DSHW-2024-006502 195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144880 • Salt Lake City, UT 84114-4880
Telephone [phone] • Fax [phone] • T.D.D. 711
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah
SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor
Department of
Environmental Quality
Kimberly D. Shelley
Executive Director
DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Douglas J. Hansen
Director
May 30, 2024
Tom Henriod
Rockworth Companies, LLC
4655 South 2300 East, Suite 205
Holladay, UT 84117
RE: Comments on the Monitoring Well Installation and Quarterly Groundwater Monitoring Report,
April 2024
21st & 21st Properties
2100 South and 2100 East, Salt Lake City, Utah 84109
UTCA-0032
Dear Mr. Henroid:
The Division of Waste Management and Radiation Control (Division) has performed its review of the
Monitoring Well Installation and Quarterly Groundwater Monitoring Report, April 2024 (Report) dated
May 9, 2024. The Report details the groundwater monitoring well installation and first quarter, 2024
sampling performed at the 21st & 21st Properties (Site) located at 2100 South 2100 East, Salt Lake City,
Utah.
Comments pertaining specifically to the Report are included in the attachment to this letter. Please
provide a response to the attached comments by July 15, 2024.
In addition to the attached specific comments on the Report, the Division has identified several other
issues related to the Site.
1.The Division understands that a Corrective Measures Implementation Report (CMIR) is in
development, outlining the completed tasks specified in the March 2021 Remedial Action Plan
(RAP). The Report indicates in Section 5.0 that the Vapor Intrusion Mitigation System (VIMS)
was installed at the Site, the source was removed, and contaminated soil was excavated and
taken off-site in accordance with the RAP. As of the date of this letter, the Division has not
received the CMIR and cannot verify the actions described in the Report. Please provide the
CMIR by July 1, 2024.
(Over)
Page 2 of 3
2.It is the Division’s understanding that the Revised Site Management Plan (SMP) Outline
(Outline) submitted February 17, 2022 (and as provided in Appendix D of the Report), outlines
the installation of monitoring wells and monitoring requirements for the Site. Additionally, the
Outline highlights the steps to be taken if contaminant action limits are exceeded and if
commercial land use exceedances are identified. According to Section 5.0 of the Report, data
from all on-site monitoring wells (MW-1A, MW-4, and MW-5) exceeded the
U.S. Environmental Protection Agency (EPA) Commercial Vapor Intrusion Screening Level
(VISL) for tetrachloroethene (PCE). Additionally, the monitoring well on the off-Site property
and to the west of the Site (MW-2A) exceeds the U.S. EPA Commercial VISL for PCE as well.
Based on the agreements set forth in the Outline, additional investigation is required.
The Division is aware that the installation of the VIMS was proposed in the RAP. However, the
Outline indicates that if a Cancer Risk of 1E-04 or greater and a hazard index of 1 or greater are
identified in on-site monitoring wells, “Terracon must prove that the VIMS is protective for this
risk range.” Per the Outline, the following is to be performed for four consecutive quarters to
ensure the VIMS is adequately mitigating the vapor intrusion pathway:
a.The VIMS exhaust pipes should be sampled for the Contaminants of Concern (COCs)
that include PCE, trichloroethylene (TCE), cis-1,2-dichloroethene (cis-DCE), 1,1-
dichloroethylene (1,1-DCE), and vinyl chloride.
b.Permanent sub-slab vapor points should be installed and sampled for COCs.
c.Indoor air sampling for COCs should be performed in tandem with the sub-slab vapor
sampling. Evaluation of the efficacy of the VIMS must address cumulative risk to the
commercial receptor, not just individual contaminant risk.
The Report indicates the Commercial VISL for PCE was exceeded at MW-2A. This exceedance
triggers additional investigation of potential off-stie impacts per the Outline. Soil gas sampling,
in accordance with the Outline, must be performed to assess whether COCs pose a potential risk
to the property associated with MW-2A, and areas west of the Site.
Please provide the Additional Investigation Work Plan (Work Plan), assessing contamination and
exposure pathways at the Site as described in the Outline by August 1, 2024.
If you have any questions, please call Ethan Upton at 385-414-1323.
Sincerely,
Paige Walton, Program Manager Corrective Action
Division of Waste Management and Radiation Control
Page 3 of 3
PW/EAU/wa
Enclosure: Division Comments on the Monitoring Well Installation and Quarterly Groundwater
Monitoring Report, April 2024
c: Dorothy Adams, Interim Health Officer, Salt Lake County Health Dept.
Ron Lund, Environmental Health Director, Salt Lake County Health Dept.
Eric Peterson, Environmental Health Deputy Director, Salt Lake County Health Dept.
Eileen Brennan, Division of Environmental Response and Remediation, UDEQ
Andrew Turner, Terracon Consultants, Inc. (Email)
Tom Henroid, Rockworth Companies, LLC (Hard Copy and Email)
Page 1 of 3
Division Comments on the Monitoring Well Installation and Quarterly Groundwater Monitoring
Report, April 2024
1.Throughout the Monitoring Well Installation and Quarterly Groundwater Monitoring Report,
April 2024 (Report) for the 21st & 21st Properties (Site) located at 2100 South 2100 East,
Salt Lake City, Utah, reference is made to MW-1 through MW-3. As noted in Section 1.1 of the
Report, MW-1 through MW-3 had production issues and replacement wells MW-1A through
MW-3A were installed in January 2024. The Report does not refer to the replacement well
numbers, which creates confusion as to which wells were sampled. Revise the Report in its
entirety to refer to the correct well numbers, e.g., MW-1A, MW-2A, and MW-3A, consistent
with the well logs in Appendix C.
2.Section 1.1 of the Report indicates that new monitoring wells were constructed due to the
inability to sample the original monitoring wells on-Site (MW-1, MW-2, and MW-3). However,
the Report does not indicate whether the original wells were abandoned or destroyed before or
during the redevelopment of the Site. Update the Report to indicate the status of the original
three monitoring wells. If the monitoring wells are still active update the figures to include their
location.
3.Section 1.1 indicates that the Outline was submitted to Dale Urban on February 17, 2024. Please
clarify the text that the Outline was provided in 2022.
4.The installation of five monitoring wells (MW-1A, MW-2A, MW-3A, MW-4, and MW-5) was
proposed in the Revised Site Management Plan (SMP) Outline (Outline). However, the
construction details were not expressly included in the Outline nor submitted in a formal work
plan. As such, it is not clear whether details on well construction were discussed with Division
personnel. Section 1.2 of the Report outlines the monitoring well installation and construction,
which includes all five wells installed to approximately 40 feet below land surface (ft bls) and
screened from 20 to 40 ft bls. These screen lengths are atypically long. Several uncertainties
arise with the increase in monitoring well screen length, most notably contamination location and
mobilization through the lithology. Please revise the Report to include the rationale of the
chosen well construction methodology and to discuss uncertainties in comparing data collected
across varying well screen lengths.
5.Section 1.2 indicates the newly installed monitoring wells were developed using a surge block
and bailer until geochemical parameters were stabilized, with a minimum of six “purge volumes”
extracted from each monitoring well. During the Division’s sampling observation on
March 31, 2024, the purge water from the observed wells appeared highly turbid and it was
unclear how stabilization was determined, based solely on observation of the color of the
groundwater sample. The stabilization criteria used to determine if the monitoring wells were
fully developed were not discussed in the Report. Additionally, “purge volumes” and the total
development volume are not detailed in the Report. Please discuss what parameters and
stabilization criteria were used for development. Additionally, define purge volumes and include
the well development logs in the Report, so calculations may be verified.
Page 2 of 3
6.Sections 1.2 and 2.1 indicate that purge water from the development and sampling of new wells
was spread on-site and allowed to infiltrate into the ground. Division does not practice thin
spreading without generator knowledge and/or waste characterization data. Additionally, if
generator knowledge is known and thin spreading is practiced, the water extracted from the wells
should never be allowed to leave the Site or infiltrate into the ground. Thin spreading should be
performed on an impervious surface to allow known contaminants of concern to volatilize
without being reintroduced into the subsurface. Please provide justification, e.g., historical waste
analysis data, for handling investigation derived waste in this manner.
7.Section 1.3 of the Report states MW-4 was unable to be surveyed due to “considerable large
debris located on top of the well.” As the well was installed in January 2024, it is unclear the
source of this debris. Please indicate if MW-4 will be surveyed and when the survey will occur
so that it may be included in future groundwater elevation measurements. The Division
understands that the survey of the monitoring wells was collected off an “arbitrary
semi-permanent on-site benchmark.” If this method is used to survey monitoring well
elevations, MW-4 should be measured based on the same benchmark as the monitoring wells
that were previously surveyed. If the same benchmark cannot be utilized, it is recommended that
all monitoring wells on-site be resurveyed.
8.Section 2.1 of the Report outlines the sampling procedure used to sample all five monitoring
wells at the Site. The Report indicates the monitoring wells were purged and sampled using a
bailer. However, there are no decontamination procedures discussed in the Report for how the
equipment used to sample was decontaminated in between monitoring wells. Update the Report
to discuss the decontamination procedures and efforts to reduce cross-contamination for the
water level meter and bailer used during sampling. If a new bailer and twine was used for each
monitoring well, please update the Report accordingly.
9.The Report outlines the use of a bailer to sample the monitoring wells. During the Division’s
observation of sampling on March 31, 2024, Terracon personnel stated that the groundwater was
too deep to perform low-flow sampling using a peristaltic pump. The Division suggests
sampling via low-flow sampling procedure to obtain the most accurate, representative
groundwater sample possible at the Site. Please update the Report with rationale of using a
bailer rather than a peristaltic pump for this sampling event and the planned sampling procedure
for future groundwater monitoring events using the low-flow method.
10.Section 2.1 of the Report states that prior to sampling, geochemical parameters (temperature, pH,
specific conductivity, dissolved oxygen, and oxygen reduction potential) were collected until
stability was achieved or three volumes were purged from the monitoring wells. However, the
Report does not define what groundwater parameter values are used to determine stabilization or
what constitutes a “volume” (i.e. well volume, boring volume, equipment volume). Please
provide the well volume calculations and groundwater sampling forms demonstrating stability of
groundwater geochemical parameters or sufficient well purge volumes.
11.Section 2.2 indicates groundwater elevations ranged from 67.22 to 77.22 feet above mean sea
level. The Division understands that a survey was performed using an arbitrary benchmark
rather than a benchmark with a known elevation above mean sea level. Based on the relative
elevation of the Site, the groundwater elevations are not likely representative of actual feet above
mean sea level and should be reported accordingly throughout the report, in the figures, and in
Table 1.
Page 3 of 3
12.Section 5.0 indicates that the off-Site well, MW-2A, exceeds the commercial vapor intrusion
screening level (VISL) for tetrachloroethylene (PCE). As noted in Exhibit 2, MW-2A is located
near a building (northwest corner of 2100 S and 2100 E). It appears that the extent of the
groundwater plume has not been defined in this direction. Discuss the potential for vapor
intrusion issues in this building. Also clarify if the owner of the building has been notified of
potential vapor intrusion issues due to impacted groundwater underlying the building.
13.The Outline provided in Appendix D indicates the on-site monitoring action levels are based on a
cancer risk of 1E-04 or greater and a hazard index of 1 or greater. However, in order to enter
into an SMP, the total (cumulative) cancer risk must be shown to be within the acceptable cancer
risk range of 1E-04 to 1E-06 and equal to or below a hazard index of one, as defined in Utah
Administrative Code R315-101. While use of the action levels (VISLs) provides a gauge as the
magnitude of residual contamination, individual comparison is not acceptable, but rather total
risk and hazard must be determined.
14.The Division of Environmental Response and Remediation (DERR) Leaking Underground
Storage Tank (LUST) located in the southwest portion of the Site was discussed in Section 5.0 of
the Report. The DERR LUST regulatory requirements and regulations do not fall under the
Division’s Environmental Cleanup Program (ECP) and are not governed under the requirements
of Utah Administrative Code R315-101 which establishes the requirements for the Sites under in
the ECP. As such, the DERR LUST at the Site should not be included in the Report.
Additionally, DERR initial screening levels (ISLs), Tier 1 screening levels, and Utah
groundwater quality standards should not be listed in the Tables or used to scrutinize analytical
results as they are not relevant to Utah Administrative Code R315-101. Please update the report
accordingly.
Responses to DWMRC May 30, 2024, Comments on the Monitoring Well
Installation and Quarterly Groundwater Monitoring Report, April 2024
1. Well Number Updates
Replacement well numbers MW-1A, MW-2A, and MW-3A now included.
2. Previous Well Abandonment
Abandonment procedures provided in the report. These wells are no longer active.
3. Outline Submittal
Updated.
4. Well Construction Details
The well construction details were discussed on multiple occasions with Dale Urban. It was
decided to go to 40 ft bgs to ensure that we were well within the groundwater column to
properly sample, especially since suspected DNAPL may be present. Previously, well depths
to 30 ft bgs produced little to no water. Groundwater can fluctuate on and off-site due to
high influx years and clayey layers present at depth, and we wanted to make sure that
water would not go above the screening interval (especially since there was also historically
LNAPL at a portion of the site). Had we screened a smaller interval (i.e. from 40-25 ft bgs),
both MW-1A and MW-4 would have groundwater above the screened zone, which can lead
to considerable uncertainties. A 20-foot screening level is rather common.
5. Well Development
Development forms are included in Appendix E and described in the report.
6. Purge Water
Any potential source has been previously removed from the site as determined by
substantial stockpile and soil confirmation conducted at the site. No significant off-site soil
or groundwater exceedances in chlorinated solvents or petroleum hydrocarbons had
previously been noted. Additionally, any groundwater generated during purging (both off
and on-site) was placed in portions of the site where off site migration would not be
predicted, and a vapor barrier is present under the residential buildings at the site. Due to
the results obtained during this investigation, any water purged during future well sampling
activities will be drummed and characterized as needed.
The installation, development, and sampling of both these wells and previous wells was
discussed with Dale Urban on multiple occasions. Well installation, development, and
sampling occurred on and off-site in 2021. It was never requested that any water generated
be drummed, and no comment was received from DWMRC requesting this to occur before or
after the sampling event or the report being issued.
7. Well Survey of MW-4
The same benchmark will be utilized to survey MW-4 once the location is accessible. The
area is currently an active construction zone and covered in 10-20 foot long steel I-beams
being used for outer building construction that began after our initial well installation.
8. Decontamination Procedures
Updated and addressed in the report.
9. Low-Flow Sampling
Although not required, it was originally planned to conduct low-flow sampling techniques to
sample these wells. Due to the depth of the groundwater (approximately 25 feet bgs),
peristaltic pumps are not able to effectively pump from that depth and still provide a stable
flow to accurately sample these wells. Purging at least three well volumes and sampling
using a bailer was then utilized instead, which is also an acceptable method.
10. Sampling Parameters
Report has been updated to include sampling and parameter notes.
11. Arbitrary Benchmark
Report and exhibits have been updated.
12. Extent of Groundwater Plume and Vapor Intrusion Issues
A previous groundwater sample collected at former monitoring well MW-2 did not exceed a
VISL for a chlorinated solvent. Additionally, a groundwater sample collected further west of
the off-site building during a previous investigation did not exceed a regulatory screening
level. Due to a single event showing a regulatory exceedance, it is premature to state that
there is a potential vapor intrusion issue off-site. Additionally, a risk evaluation was
conducted at this location with the concentrations of chloroform, PCE, and TCE imputed. The
calculated carcinogenic risk was 4.48 x 10-5, which is below the 1 x 10-4 target commercial
hazard index. It was recommended in the current groundwater monitoring report to conduct
at least one more round of groundwater sampling to determine whether this recent reading
is anomalous or if a potential issue is present. Another quarterly groundwater monitoring
event is expected to occur in June 2024. If the calculated carcinogenic risk exceeds the
commercial hazard index, we will propose an additional investigation as needed.
13. Action Levels
An extensive VIMS system was designed and installed at the site. This groundwater report is
intended to present the results from the most recent groundwater sampling event. Another
quarterly groundwater monitoring event is scheduled for June 2024. As discussed in the
recent report, we would like to determine whether concentrations found during this
sampling event are anomalous or further investigation is warranted. Previous data collected
at the site does not indicate the same level of concern as this recent data.
14. DERR LUST Screening Levels
The southwest portion of the site is a DERR regulated LUST site. This report is also
submitted to Eileen Brennan, by request, in order to request closure for that related portion
of the site. DERR results are applicable for the LUST portion of the site and, hence, should
remain in the report.
6952 South High Tech Drive Ste. B
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials 1
Cover Page
Monitoring Well Installation and
Quarterly Groundwater Monitoring
Report; April 2024
21st & 21st Properties
NEC 100 South and 2100 East
Salt Lake City, Salt Lake County, Utah
May 9, 2024 Updated June 7, 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
June 7, 2024
Rockworth Companies
4655 South 2300 East, Suite 205
Holladay, Utah 84117
Attn: Mr. Tom Henriod
P: [phone]
E:[e-mail]
Re:Monitoring Well Installation and 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 Monitoring Well Installation
and Quarterly Groundwater Monitoring Report documenting the first 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, March 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
June 7, 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 at on-site historical dry cleaning businesses
as well as from off-site sources. 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 an historical 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
June 7, 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
June 7, 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. On-site monitoring well MW-4 was unable to be properly surveyed due to
considerable large debris located on top of the well. 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 install five new groundwater monitoring wells (three wells replacing older
wells) and collect groundwater samples to assess the current groundwater conditions. This
is the first 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
June 7, 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 March 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).
Prior to collecting the groundwater samples, each well was purged using a single-use
disposable plastic bailer and twine which was discarded after use on each well. The water
meter used for depth to water measurements was decontaminated using an Alconox wash
followed by a rinsing with potable and distilled water. Parameters, including temperature,
pH, conductivity, DO, and oxygen reduction potential (ORP) were periodically collected
during the purging. Each well was purged a minimum of three well volumes (calculated
volume of water within the initial water column) prior to sampling. No sheen or distinct odor
was noted during the sampling. Purge water was thin spread across the surface of the site
and allowed to evaporate or infiltrate into surface soils. Care was taken to not allow purge
water to affect nearby receptors (e.g., stormwater catch basins, utilities, etc.) or residential
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
June 7, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 5
property. Appendix F includes the field notes associated with the groundwater sampling
event.
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 67.22 (MW-3)
and 77.22 (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.
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
June 7, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 6
Well Analyte Exceedance
MW-1
Chloroform
PCE
TCE
Residential VISL
Commercial VISL, MCL
Residential VISL
MW-2
Chloroform
PCE
TCE
Residential VISL
Commercial VISL, MCL
Residential VISL
MW-3 Chloroform
PCE
Residential VISL
MCL
MW-4 Chloroform
PCE
Residential VISL
Commercial VISL, MCL
MW-5
Chloroform
PCE
TCE
1,1,1,2-Tetrachloroethane
Residential VISL
Commercial VISL, MCL
Residential VISL
Residential VISL
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, chloroform, and
1,1,1,2-tetrachloroethane 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.
Concentrations of PCE in groundwater were considerably higher than historical groundwater
samples taken in the vicinity of MW-1A, MW-4 and MW-5. TCE is also elevated above
Monitoring Well Installation and Report
21st and 21st Salt Lake City, Utah
June 7, 2024 | Terracon Project No. 61197460
Facilities | Environmental | Geotechnical | Materials 7
Residential VISLs in select areas. A Vapor Intrusion Mitigation System (VIMS) was installed
at the site to mitigate potential vapor intrusion associated with the elevated PCE in
groundwater. 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 full completed, and the pipes have not been fully
tested. Additionally, commercial and residential tenants have not moved into the site.
Terracon recommends conducting an additional round of quarterly groundwater sampling
(scheduled for June 2024) to determine whether a further investigation is warranted.
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. 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. Results from this sampling are
considerably higher than concentrations from the previous sampling event at the initial
adjacent well location, which did not exceed the Commercial VISL.
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, and chloroform were imputed. 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 4.48 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. The area around MW-2A is
developed for commercial use.
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)
MW-1A 2 20-40 39.86 97.65 03/21/24 24.89 72.76
MW-2A 2 20-40 40.27 96.09 03/21/24 27.78 68.31
MW-3A 2 20-40 40.04 96.10 03/21/24 28.88 67.22
MW-4 2 20-40 39.88 NM 03/21/24 24.90 NM
MW-5 2 20-40 40.21 102.49 03/21/24 25.27 77.22
NOTES:
ft-bgs = Feet below ground surface.
ft-btoc = Feet below top of casing.
NM = Not measured.
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 0.0113 0.05
ACROLEIN 107-02-8 8260B mg/l NE 0.00418 0.0176 NE NE NE <0.0500 0.00254 0.05 <0.0500 0.00254 0.05
ACRYLONITRILE 107-13-1 8260B mg/l NE 0.00732 0.032 NE NE NE <0.0100 0.000671 0.01 <0.0100 0.000671 0.01
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 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 0.00128 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 <0.00100 0.000126 0.001
TRANS-1,2-DICHLOROETHENE 156-60-5 8260B mg/l 0.1 0.109 0.457 NE NE 0.1 <0.00100 0.000149 0.001 <0.00100 0.000149 0.001
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
Date Collected 3/21/2024 3/21/2024
Depth to Water (ft)24.89 27.78
Lab Sample ID L1718417-01 L1718417-02
Client Sample ID MW-1A MW-2A
Page 1 of 9
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
Date Collected 3/21/2024 3/21/2024
Depth to Water (ft)24.89 27.78
Lab Sample ID L1718417-01 L1718417-02
Client Sample ID MW-1A MW-2A
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 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 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 0.407 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 0.00144 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 9
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
Date Collected 3/21/2024 3/21/2024
Depth to Water (ft)24.89 27.78
Lab Sample ID L1718417-01 L1718417-02
Client Sample ID MW-1A MW-2A
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
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 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
Result Q MDL RDL Result Q MDL RDL
<0.0500 0.0113 0.05 <0.0500 0.0113 0.05
<0.0500 0.00254 0.05 <0.0500 0.00254 0.05
<0.0100 0.000671 0.01 <0.0100 0.000671 0.01
<0.00100 0.0000941 0.001 <0.00100 0.0000941 0.001
<0.00100 0.000118 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 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 0.00106 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
3/21/2024 3/21/2024
28.88 24.90
L1718417-03 L1718417-04
MW-3A MW-4
Page 4 of 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
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
3/21/2024 3/21/2024
28.88 24.90
L1718417-03 L1718417-04
MW-3A MW-4
<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 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 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 0.819 0.006 0.02
<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 0.000355 J 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 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
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
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
3/21/2024 3/21/2024
28.88 24.90
L1718417-03 L1718417-04
MW-3A MW-4
<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 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
Result Q MDL RDL
<0.0500 0.0113 0.05
<0.0500 0.00254 0.05
<0.0100 0.000671 0.01
<0.00100 0.0000941 0.001
<0.00100 0.000118 0.001
<0.00100 0.000136 0.001
<0.00100 0.000129 0.001
<0.00500 0.000605 0.005
<0.00100 0.000157 0.001
<0.00100 0.000125 0.001
<0.00100 0.000127 0.001
<0.00100 0.000128 0.001
0.000129 J 0.000116 0.001
<0.00100 0.00014 0.001
<0.00500 0.000192 0.005
<0.0500 0.000575 0.05
0.00208 J 0.000111 0.005
<0.00250 0.00096 0.003
<0.00100 0.000106 0.001
<0.00100 0.000114 0.001
<0.00500 0.000276 0.005
<0.00100 0.000126 0.001
<0.00100 0.000122 0.001
<0.00100 0.000107 0.001
<0.00100 0.00011 0.001
<0.00100 0.00012 0.001
<0.00500 0.000374 0.005
<0.00100 0.0001 0.001
<0.00100 0.0000819 0.001
<0.00100 0.000188 0.001
0.000431 J 0.000126 0.001
<0.00100 0.000149 0.001
<0.00100 0.000149 0.001
<0.00100 0.000142 0.001
<0.00100 0.00011 0.001
<0.00100 0.000111 0.001
25.27
3/21/2024
MW-5
L1718417-05
Page 7 of 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
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
25.27
3/21/2024
MW-5
L1718417-05
<0.00100 0.000118 0.001
<0.00100 0.000161 0.001
<0.00100 0.000105 0.001
<0.00100 0.000137 0.001
<0.00100 0.000337 0.001
<0.00100 0.000105 0.001
<0.00100 0.00012 0.001
<0.0100 0.00119 0.01
<0.00500 0.00043 0.005
<0.0100 0.000478 0.01
<0.00100 0.000101 0.001
<0.00500 0.001 0.005
<0.00100 0.0000993 0.001
<0.00100 0.000118 0.001
0.00389 0.000147 0.001
<0.00100 0.000133 0.001
<0.00100 0.00018 0.001
6.89 0.075 0.25
<0.00100 0.000278 0.001
<0.00100 0.00023 0.001
<0.00100 0.000481 0.001
<0.00100 0.000149 0.001
0.000793 J 0.000158 0.001
0.00263 0.00019 0.001
<0.00500 0.00016 0.005
<0.00250 0.000237 0.003
<0.00100 0.000322 0.001
<0.00100 0.000104 0.001
Page 8 of 9
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
Date Collected
Depth to Water (ft)
Lab Sample ID
Client Sample ID
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
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
25.27
3/21/2024
MW-5
L1718417-05
<0.00100 0.000104 0.001
<0.00100 0.000234 0.001
<0.00300 0.000174 0.003
Page 9 of 9
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
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1
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(
f
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)
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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
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R
I
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G

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P
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(
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 05JUN2024:12:13:36
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 05JUN2024:12:13:36
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 05JUN2024:12:13:36
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 05JUN2024:12:13:36
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 U 2.30E-05 U 1.00E-02 U 1.95E-03 U 1 6.83E-03
Tetrachloroethylene 127-18-No Yes Organics 2.10E-03 U 2.60E-07 U 6.00E-03 U 4.00E-02 U 1 3.34E-02
Trichloroethylene 79-01-6 Yes Yes Organics 4.60E-02 U 4.10E-06 U 5.00E-04 U 2.00E-03 U 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
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
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 05JUN2024:12:13:36
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 U 2.30E-05 U 1.00E-02 U 1.95E-03 U 1 6.83E-03 119.38 2.87E-02 1.18E+00 4.90E-01
Tetrachloroethylene 2.10E-03 U 2.60E-07 U 6.00E-03 U 4.00E-02 U 1 3.34E-02 165.83 1.65E-01 2.14E+00 8.92E-01
Trichloroethylene 4.60E-02 U 4.10E-06 U 5.00E-04 U 2.00E-03 U 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 1.28E+00 5.09E-07 4.39E-08 5.24E-06 5.80E-06 6.38E-03 5.06E-04
1 Yes 4.66E-03 1.47E-02 2.55E-02 5.00E+00 4.07E+02 1.10E-05 6.24E-06 1.88E-05 3.61E-05 3.38E+00 1.77E+00
1 Yes 1.48E-04 1.23E-03 2.12E-03 5.00E+00 1.44E+00 1.22E-06 1.93E-07 1.51E-06 2.92E-06 1.44E-01 2.09E-02
------1.27E-05 6.47E-06 2.56E-05 4.48E-05 3.53E+00 1.79E+00
Inhalation
Child
HQ
Noncarcinogenic
Child
HI
Ingestion
Adult
HQ
Dermal
Adult
HQ
Inhalation
Adult
HQ
Noncarcinogenic
Adult
HI
3.15E-01 3.22E-01 3.84E-03 3.36E-04 3.15E-01 3.19E-01
4.88E+00 1.00E+01 2.03E+00 1.17E+00 4.88E+00 8.09E+00
3.45E-01 5.10E-01 8.63E-02 1.39E-02 3.45E-01 4.45E-01
5.54E+00 1.09E+01 2.12E+00 1.19E+00 5.54E+00 8.85E+00
Appendix H
Chain of Custody and Laboratory Data Sheets
ANALYTICAL REPORT
April 04, 2024
Terracon - Salt Lake City, UT
Sample Delivery Group:L1718417
Samples Received:03/23/2024
Project Number:61197460
Description:21st and 21st Properties
Report To:Andrew Turner
6949 South High Tech Drive
Midvale, UT 84047
Entire Report Reviewed By:
April 04, 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 www.pacenational.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 L1718417 04/04/24 16:51 1 of 27
April 04, 2024
Chris Ward
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 L1718417 04/04/24 16:57 1 of 27
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-1 L1718417-01 5
MW-2 L1718417-02 7
MW-3 L1718417-03 9
MW-4 L1718417-04 11
MW-5 L1718417-05 13
Qc: Quality Control Summary 15
Volatile Organic Compounds (GC/MS) by Method 8260B 15
Gl: Glossary of Terms 25
Al: Accreditations & Locations 26
Sc: Sample Chain of Custody 27
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 L1718417 04/04/24 16:51 2 of 27
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
Terracon - Salt Lake City, UT 61197460 L1718417 04/04/24 16:57 2 of 27
SAMPLE SUMMARY
Collected by Collected date/time Received date/time
MW-1 L1718417-01 GW Steve Maliszeski 03/21/24 14:38 03/23/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2256496 1 03/30/24 05:30 03/30/24 05:30 JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2257996 10 04/01/24 23:36 04/01/24 23:36 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-2 L1718417-02 GW Steve Maliszeski 03/21/24 15:20 03/23/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2256496 1 03/30/24 05:50 03/30/24 05:50 JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2257996 10 04/01/24 23:55 04/01/24 23:55 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-3 L1718417-03 GW Steve Maliszeski 03/21/24 16:00 03/23/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2256496 1 03/30/24 06:11 03/30/24 06:11 JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2257996 1 04/01/24 20:28 04/01/24 20:28 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-4 L1718417-04 GW Steve Maliszeski 03/21/24 13:55 03/23/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2256496 1 03/30/24 06:31 03/30/24 06:31 JHH Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2257996 20 04/02/24 00:14 04/02/24 00:14 JHH Mt. Juliet, TN
Collected by Collected date/time Received date/time
MW-5 L1718417-05 GW Steve Maliszeski 03/21/24 11:45 03/23/24 08:00
Method Batch Dilution Preparation Analysis Analyst Location
date/time date/time
Volatile Organic Compounds (GC/MS) by Method 8260B WG2256764 1 03/31/24 03:40 03/31/24 03:40 TJJ Mt. Juliet, TN
Volatile Organic Compounds (GC/MS) by Method 8260B WG2259395 250 04/04/24 09:59 04/04/24 09:59 ACG Mt. Juliet, TN
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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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
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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Chris Ward
Project Manager
ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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SAMPLE RESULTS - 01
L1718417
MW-1
Collected date/time: 03/21/24 14:38
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 0.0113 0.0500 1 03/30/2024 05:30 WG2256496
Acrolein U 0.00254 0.0500 1 03/30/2024 05:30 WG2256496
Acrylonitrile U 0.000671 0.0100 1 03/30/2024 05:30 WG2256496
Benzene U 0.0000941 0.00100 1 03/30/2024 05:30 WG2256496
Bromobenzene U 0.000118 0.00100 1 03/30/2024 05:30 WG2256496
Bromodichloromethane U 0.000136 0.00100 1 03/30/2024 05:30 WG2256496
Bromoform U 0.000129 0.00100 1 03/30/2024 05:30 WG2256496
Bromomethane U 0.000605 0.00500 1 03/30/2024 05:30 WG2256496
n-Butylbenzene 0.00131 0.000157 0.00100 1 03/30/2024 05:30 WG2256496
sec-Butylbenzene 0.000735 J 0.000125 0.00100 1 03/30/2024 05:30 WG2256496
tert-Butylbenzene 0.000194 J 0.000127 0.00100 1 03/30/2024 05:30 WG2256496
Carbon tetrachloride U 0.000128 0.00100 1 03/30/2024 05:30 WG2256496
Chlorobenzene U 0.000116 0.00100 1 03/30/2024 05:30 WG2256496
Chlorodibromomethane U 0.000140 0.00100 1 03/30/2024 05:30 WG2256496
Chloroethane U 0.000192 0.00500 1 03/30/2024 05:30 WG2256496
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 03/30/2024 05:30 WG2256496
Chloroform 0.00122 J 0.000111 0.00500 1 03/30/2024 05:30 WG2256496
Chloromethane U 0.000960 0.00250 1 03/30/2024 05:30 WG2256496
2-Chlorotoluene U 0.000106 0.00100 1 03/30/2024 05:30 WG2256496
4-Chlorotoluene U 0.000114 0.00100 1 03/30/2024 05:30 WG2256496
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 03/30/2024 05:30 WG2256496
1,2-Dibromoethane U 0.000126 0.00100 1 03/30/2024 05:30 WG2256496
Dibromomethane U 0.000122 0.00100 1 03/30/2024 05:30 WG2256496
1,2-Dichlorobenzene U 0.000107 0.00100 1 03/30/2024 05:30 WG2256496
1,3-Dichlorobenzene U 0.000110 0.00100 1 03/30/2024 05:30 WG2256496
1,4-Dichlorobenzene U 0.000120 0.00100 1 03/30/2024 05:30 WG2256496
Dichlorodifluoromethane U 0.000374 0.00500 1 03/30/2024 05:30 WG2256496
1,1-Dichloroethane U 0.000100 0.00100 1 03/30/2024 05:30 WG2256496
1,2-Dichloroethane U 0.0000819 0.00100 1 03/30/2024 05:30 WG2256496
1,1-Dichloroethene U 0.000188 0.00100 1 03/30/2024 05:30 WG2256496
cis-1,2-Dichloroethene U 0.000126 0.00100 1 03/30/2024 05:30 WG2256496
trans-1,2-Dichloroethene U 0.000149 0.00100 1 03/30/2024 05:30 WG2256496
1,2-Dichloropropane U 0.000149 0.00100 1 03/30/2024 05:30 WG2256496
1,1-Dichloropropene U 0.000142 0.00100 1 03/30/2024 05:30 WG2256496
1,3-Dichloropropane U 0.000110 0.00100 1 03/30/2024 05:30 WG2256496
cis-1,3-Dichloropropene U 0.000111 0.00100 1 03/30/2024 05:30 WG2256496
trans-1,3-Dichloropropene U 0.000118 0.00100 1 03/30/2024 05:30 WG2256496
2,2-Dichloropropane U 0.000161 0.00100 1 03/30/2024 05:30 WG2256496
Di-isopropyl ether U 0.000105 0.00100 1 03/30/2024 05:30 WG2256496
Ethylbenzene 0.000717 J 0.000137 0.00100 1 03/30/2024 05:30 WG2256496
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 03/30/2024 05:30 WG2256496
Isopropylbenzene 0.00103 0.000105 0.00100 1 03/30/2024 05:30 WG2256496
p-Isopropyltoluene 0.000523 J 0.000120 0.00100 1 03/30/2024 05:30 WG2256496
2-Butanone (MEK)U 0.00119 0.0100 1 03/30/2024 05:30 WG2256496
Methylene Chloride U 0.000430 0.00500 1 03/30/2024 05:30 WG2256496
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 03/30/2024 05:30 WG2256496
Methyl tert-butyl ether U 0.000101 0.00100 1 03/30/2024 05:30 WG2256496
Naphthalene 0.00386 J 0.00100 0.00500 1 03/30/2024 05:30 WG2256496
n-Propylbenzene 0.00217 0.0000993 0.00100 1 03/30/2024 05:30 WG2256496
Styrene U 0.000118 0.00100 1 03/30/2024 05:30 WG2256496
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 03/30/2024 05:30 WG2256496
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 03/30/2024 05:30 WG2256496
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 03/30/2024 05:30 WG2256496
Tetrachloroethene 0.431 0.00300 0.0100 10 04/01/2024 23:36 WG2257996
Toluene U 0.000278 0.00100 1 03/30/2024 05:30 WG2256496
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 03/30/2024 05:30 WG2256496
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 01
L1718417
MW-1
Collected date/time: 03/21/24 14:38
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 03/30/2024 05:30 WG2256496
1,1,1-Trichloroethane U 0.000149 0.00100 1 03/30/2024 05:30 WG2256496
1,1,2-Trichloroethane U 0.000158 0.00100 1 03/30/2024 05:30 WG2256496
Trichloroethene 0.00122 0.000190 0.00100 1 03/30/2024 05:30 WG2256496
Trichlorofluoromethane U 0.000160 0.00500 1 03/30/2024 05:30 WG2256496
1,2,3-Trichloropropane U 0.000237 0.00250 1 03/30/2024 05:30 WG2256496
1,2,4-Trimethylbenzene 0.0265 0.000322 0.00100 1 03/30/2024 05:30 WG2256496
1,2,3-Trimethylbenzene 0.00909 0.000104 0.00100 1 03/30/2024 05:30 WG2256496
1,3,5-Trimethylbenzene 0.00955 0.000104 0.00100 1 03/30/2024 05:30 WG2256496
Vinyl chloride U 0.000234 0.00100 1 03/30/2024 05:30 WG2256496
Xylenes, Total 0.0120 0.000174 0.00300 1 03/30/2024 05:30 WG2256496
(S) Toluene-d8 100 80.0-120 03/30/2024 05:30 WG2256496
(S) Toluene-d8 106 80.0-120 04/01/2024 23:36 WG2257996
(S) 4-Bromofluorobenzene 95.9 77.0-126 03/30/2024 05:30 WG2256496
(S) 4-Bromofluorobenzene 112 77.0-126 04/01/2024 23:36 WG2257996
(S) 1,2-Dichloroethane-d4 93.8 70.0-130 03/30/2024 05:30 WG2256496
(S) 1,2-Dichloroethane-d4 109 70.0-130 04/01/2024 23:36 WG2257996
1 Cp
2 Tc
3 Ss
4 Cn
5 Sr
6 Qc
7 Gl
8 Al
9 Sc
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SAMPLE RESULTS - 02
L1718417
MW-2
Collected date/time: 03/21/24 15:20
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 0.0113 0.0500 1 03/30/2024 05:50 WG2256496
Acrolein U 0.00254 0.0500 1 03/30/2024 05:50 WG2256496
Acrylonitrile U 0.000671 0.0100 1 03/30/2024 05:50 WG2256496
Benzene U 0.0000941 0.00100 1 03/30/2024 05:50 WG2256496
Bromobenzene U 0.000118 0.00100 1 03/30/2024 05:50 WG2256496
Bromodichloromethane U 0.000136 0.00100 1 03/30/2024 05:50 WG2256496
Bromoform U 0.000129 0.00100 1 03/30/2024 05:50 WG2256496
Bromomethane U 0.000605 0.00500 1 03/30/2024 05:50 WG2256496
n-Butylbenzene U 0.000157 0.00100 1 03/30/2024 05:50 WG2256496
sec-Butylbenzene U 0.000125 0.00100 1 03/30/2024 05:50 WG2256496
tert-Butylbenzene U 0.000127 0.00100 1 03/30/2024 05:50 WG2256496
Carbon tetrachloride U 0.000128 0.00100 1 03/30/2024 05:50 WG2256496
Chlorobenzene U 0.000116 0.00100 1 03/30/2024 05:50 WG2256496
Chlorodibromomethane U 0.000140 0.00100 1 03/30/2024 05:50 WG2256496
Chloroethane U 0.000192 0.00500 1 03/30/2024 05:50 WG2256496
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 03/30/2024 05:50 WG2256496
Chloroform 0.00128 J 0.000111 0.00500 1 03/30/2024 05:50 WG2256496
Chloromethane U 0.000960 0.00250 1 03/30/2024 05:50 WG2256496
2-Chlorotoluene U 0.000106 0.00100 1 03/30/2024 05:50 WG2256496
4-Chlorotoluene U 0.000114 0.00100 1 03/30/2024 05:50 WG2256496
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 03/30/2024 05:50 WG2256496
1,2-Dibromoethane U 0.000126 0.00100 1 03/30/2024 05:50 WG2256496
Dibromomethane U 0.000122 0.00100 1 03/30/2024 05:50 WG2256496
1,2-Dichlorobenzene U 0.000107 0.00100 1 03/30/2024 05:50 WG2256496
1,3-Dichlorobenzene U 0.000110 0.00100 1 03/30/2024 05:50 WG2256496
1,4-Dichlorobenzene U 0.000120 0.00100 1 03/30/2024 05:50 WG2256496
Dichlorodifluoromethane U 0.000374 0.00500 1 03/30/2024 05:50 WG2256496
1,1-Dichloroethane U 0.000100 0.00100 1 03/30/2024 05:50 WG2256496
1,2-Dichloroethane U 0.0000819 0.00100 1 03/30/2024 05:50 WG2256496
1,1-Dichloroethene U 0.000188 0.00100 1 03/30/2024 05:50 WG2256496
cis-1,2-Dichloroethene U 0.000126 0.00100 1 03/30/2024 05:50 WG2256496
trans-1,2-Dichloroethene U 0.000149 0.00100 1 03/30/2024 05:50 WG2256496
1,2-Dichloropropane U 0.000149 0.00100 1 03/30/2024 05:50 WG2256496
1,1-Dichloropropene U 0.000142 0.00100 1 03/30/2024 05:50 WG2256496
1,3-Dichloropropane U 0.000110 0.00100 1 03/30/2024 05:50 WG2256496
cis-1,3-Dichloropropene U 0.000111 0.00100 1 03/30/2024 05:50 WG2256496
trans-1,3-Dichloropropene U 0.000118 0.00100 1 03/30/2024 05:50 WG2256496
2,2-Dichloropropane U 0.000161 0.00100 1 03/30/2024 05:50 WG2256496
Di-isopropyl ether U 0.000105 0.00100 1 03/30/2024 05:50 WG2256496
Ethylbenzene U 0.000137 0.00100 1 03/30/2024 05:50 WG2256496
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 03/30/2024 05:50 WG2256496
Isopropylbenzene U 0.000105 0.00100 1 03/30/2024 05:50 WG2256496
p-Isopropyltoluene U 0.000120 0.00100 1 03/30/2024 05:50 WG2256496
2-Butanone (MEK)U 0.00119 0.0100 1 03/30/2024 05:50 WG2256496
Methylene Chloride U 0.000430 0.00500 1 03/30/2024 05:50 WG2256496
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 03/30/2024 05:50 WG2256496
Methyl tert-butyl ether U 0.000101 0.00100 1 03/30/2024 05:50 WG2256496
Naphthalene U 0.00100 0.00500 1 03/30/2024 05:50 WG2256496
n-Propylbenzene U 0.0000993 0.00100 1 03/30/2024 05:50 WG2256496
Styrene U 0.000118 0.00100 1 03/30/2024 05:50 WG2256496
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 03/30/2024 05:50 WG2256496
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 03/30/2024 05:50 WG2256496
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 03/30/2024 05:50 WG2256496
Tetrachloroethene 0.407 0.00300 0.0100 10 04/01/2024 23:55 WG2257996
Toluene U 0.000278 0.00100 1 03/30/2024 05:50 WG2256496
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 03/30/2024 05:50 WG2256496
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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SAMPLE RESULTS - 02
L1718417
MW-2
Collected date/time: 03/21/24 15:20
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 03/30/2024 05:50 WG2256496
1,1,1-Trichloroethane U 0.000149 0.00100 1 03/30/2024 05:50 WG2256496
1,1,2-Trichloroethane U 0.000158 0.00100 1 03/30/2024 05:50 WG2256496
Trichloroethene 0.00144 0.000190 0.00100 1 03/30/2024 05:50 WG2256496
Trichlorofluoromethane U 0.000160 0.00500 1 03/30/2024 05:50 WG2256496
1,2,3-Trichloropropane U 0.000237 0.00250 1 03/30/2024 05:50 WG2256496
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 03/30/2024 05:50 WG2256496
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 05:50 WG2256496
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 05:50 WG2256496
Vinyl chloride U 0.000234 0.00100 1 03/30/2024 05:50 WG2256496
Xylenes, Total U 0.000174 0.00300 1 03/30/2024 05:50 WG2256496
(S) Toluene-d8 105 80.0-120 03/30/2024 05:50 WG2256496
(S) Toluene-d8 108 80.0-120 04/01/2024 23:55 WG2257996
(S) 4-Bromofluorobenzene 95.5 77.0-126 03/30/2024 05:50 WG2256496
(S) 4-Bromofluorobenzene 111 77.0-126 04/01/2024 23:55 WG2257996
(S) 1,2-Dichloroethane-d4 96.3 70.0-130 03/30/2024 05:50 WG2256496
(S) 1,2-Dichloroethane-d4 106 70.0-130 04/01/2024 23:55 WG2257996
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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SAMPLE RESULTS - 03
L1718417
MW-3
Collected date/time: 03/21/24 16:00
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 0.0113 0.0500 1 03/30/2024 06:11 WG2256496
Acrolein U 0.00254 0.0500 1 03/30/2024 06:11 WG2256496
Acrylonitrile U 0.000671 0.0100 1 03/30/2024 06:11 WG2256496
Benzene U 0.0000941 0.00100 1 03/30/2024 06:11 WG2256496
Bromobenzene U 0.000118 0.00100 1 03/30/2024 06:11 WG2256496
Bromodichloromethane 0.000335 J 0.000136 0.00100 1 03/30/2024 06:11 WG2256496
Bromoform U 0.000129 0.00100 1 03/30/2024 06:11 WG2256496
Bromomethane U 0.000605 0.00500 1 03/30/2024 06:11 WG2256496
n-Butylbenzene U 0.000157 0.00100 1 03/30/2024 06:11 WG2256496
sec-Butylbenzene U 0.000125 0.00100 1 03/30/2024 06:11 WG2256496
tert-Butylbenzene U 0.000127 0.00100 1 03/30/2024 06:11 WG2256496
Carbon tetrachloride U 0.000128 0.00100 1 03/30/2024 06:11 WG2256496
Chlorobenzene U 0.000116 0.00100 1 03/30/2024 06:11 WG2256496
Chlorodibromomethane U 0.000140 0.00100 1 03/30/2024 06:11 WG2256496
Chloroethane U 0.000192 0.00500 1 03/30/2024 06:11 WG2256496
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 03/30/2024 06:11 WG2256496
Chloroform 0.00233 J 0.000111 0.00500 1 03/30/2024 06:11 WG2256496
Chloromethane U 0.000960 0.00250 1 03/30/2024 06:11 WG2256496
2-Chlorotoluene U 0.000106 0.00100 1 03/30/2024 06:11 WG2256496
4-Chlorotoluene U 0.000114 0.00100 1 03/30/2024 06:11 WG2256496
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 03/30/2024 06:11 WG2256496
1,2-Dibromoethane U 0.000126 0.00100 1 03/30/2024 06:11 WG2256496
Dibromomethane U 0.000122 0.00100 1 03/30/2024 06:11 WG2256496
1,2-Dichlorobenzene U 0.000107 0.00100 1 03/30/2024 06:11 WG2256496
1,3-Dichlorobenzene U 0.000110 0.00100 1 03/30/2024 06:11 WG2256496
1,4-Dichlorobenzene U 0.000120 0.00100 1 03/30/2024 06:11 WG2256496
Dichlorodifluoromethane U 0.000374 0.00500 1 03/30/2024 06:11 WG2256496
1,1-Dichloroethane U 0.000100 0.00100 1 03/30/2024 06:11 WG2256496
1,2-Dichloroethane U 0.0000819 0.00100 1 03/30/2024 06:11 WG2256496
1,1-Dichloroethene U 0.000188 0.00100 1 03/30/2024 06:11 WG2256496
cis-1,2-Dichloroethene U 0.000126 0.00100 1 03/30/2024 06:11 WG2256496
trans-1,2-Dichloroethene U 0.000149 0.00100 1 03/30/2024 06:11 WG2256496
1,2-Dichloropropane U 0.000149 0.00100 1 03/30/2024 06:11 WG2256496
1,1-Dichloropropene U 0.000142 0.00100 1 03/30/2024 06:11 WG2256496
1,3-Dichloropropane U 0.000110 0.00100 1 03/30/2024 06:11 WG2256496
cis-1,3-Dichloropropene U 0.000111 0.00100 1 03/30/2024 06:11 WG2256496
trans-1,3-Dichloropropene U 0.000118 0.00100 1 03/30/2024 06:11 WG2256496
2,2-Dichloropropane U 0.000161 0.00100 1 03/30/2024 06:11 WG2256496
Di-isopropyl ether U 0.000105 0.00100 1 03/30/2024 06:11 WG2256496
Ethylbenzene U 0.000137 0.00100 1 03/30/2024 06:11 WG2256496
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 03/30/2024 06:11 WG2256496
Isopropylbenzene U 0.000105 0.00100 1 03/30/2024 06:11 WG2256496
p-Isopropyltoluene U 0.000120 0.00100 1 03/30/2024 06:11 WG2256496
2-Butanone (MEK)U 0.00119 0.0100 1 03/30/2024 06:11 WG2256496
Methylene Chloride U 0.000430 0.00500 1 03/30/2024 06:11 WG2256496
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 03/30/2024 06:11 WG2256496
Methyl tert-butyl ether U 0.000101 0.00100 1 03/30/2024 06:11 WG2256496
Naphthalene U 0.00100 0.00500 1 03/30/2024 06:11 WG2256496
n-Propylbenzene U 0.0000993 0.00100 1 03/30/2024 06:11 WG2256496
Styrene U 0.000118 0.00100 1 03/30/2024 06:11 WG2256496
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 03/30/2024 06:11 WG2256496
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 03/30/2024 06:11 WG2256496
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 03/30/2024 06:11 WG2256496
Tetrachloroethene 0.00522 0.000300 0.00100 1 04/01/2024 20:28 WG2257996
Toluene U 0.000278 0.00100 1 03/30/2024 06:11 WG2256496
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 03/30/2024 06:11 WG2256496
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:
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SAMPLE RESULTS - 03
L1718417
MW-3
Collected date/time: 03/21/24 16:00
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 03/30/2024 06:11 WG2256496
1,1,1-Trichloroethane U 0.000149 0.00100 1 03/30/2024 06:11 WG2256496
1,1,2-Trichloroethane U 0.000158 0.00100 1 03/30/2024 06:11 WG2256496
Trichloroethene U 0.000190 0.00100 1 03/30/2024 06:11 WG2256496
Trichlorofluoromethane U 0.000160 0.00500 1 03/30/2024 06:11 WG2256496
1,2,3-Trichloropropane U 0.000237 0.00250 1 03/30/2024 06:11 WG2256496
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 03/30/2024 06:11 WG2256496
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 06:11 WG2256496
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 06:11 WG2256496
Vinyl chloride U 0.000234 0.00100 1 03/30/2024 06:11 WG2256496
Xylenes, Total U 0.000174 0.00300 1 03/30/2024 06:11 WG2256496
(S) Toluene-d8 106 80.0-120 03/30/2024 06:11 WG2256496
(S) Toluene-d8 113 80.0-120 04/01/2024 20:28 WG2257996
(S) 4-Bromofluorobenzene 96.1 77.0-126 03/30/2024 06:11 WG2256496
(S) 4-Bromofluorobenzene 107 77.0-126 04/01/2024 20:28 WG2257996
(S) 1,2-Dichloroethane-d4 98.3 70.0-130 03/30/2024 06:11 WG2256496
(S) 1,2-Dichloroethane-d4 114 70.0-130 04/01/2024 20:28 WG2257996
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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SAMPLE RESULTS - 04
L1718417
MW-4
Collected date/time: 03/21/24 13:55
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 0.0113 0.0500 1 03/30/2024 06:31 WG2256496
Acrolein U 0.00254 0.0500 1 03/30/2024 06:31 WG2256496
Acrylonitrile U 0.000671 0.0100 1 03/30/2024 06:31 WG2256496
Benzene U 0.0000941 0.00100 1 03/30/2024 06:31 WG2256496
Bromobenzene U 0.000118 0.00100 1 03/30/2024 06:31 WG2256496
Bromodichloromethane U 0.000136 0.00100 1 03/30/2024 06:31 WG2256496
Bromoform U 0.000129 0.00100 1 03/30/2024 06:31 WG2256496
Bromomethane U 0.000605 0.00500 1 03/30/2024 06:31 WG2256496
n-Butylbenzene U 0.000157 0.00100 1 03/30/2024 06:31 WG2256496
sec-Butylbenzene U 0.000125 0.00100 1 03/30/2024 06:31 WG2256496
tert-Butylbenzene U 0.000127 0.00100 1 03/30/2024 06:31 WG2256496
Carbon tetrachloride U 0.000128 0.00100 1 03/30/2024 06:31 WG2256496
Chlorobenzene U 0.000116 0.00100 1 03/30/2024 06:31 WG2256496
Chlorodibromomethane U 0.000140 0.00100 1 03/30/2024 06:31 WG2256496
Chloroethane U 0.000192 0.00500 1 03/30/2024 06:31 WG2256496
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 03/30/2024 06:31 WG2256496
Chloroform 0.00106 J 0.000111 0.00500 1 03/30/2024 06:31 WG2256496
Chloromethane U 0.000960 0.00250 1 03/30/2024 06:31 WG2256496
2-Chlorotoluene U 0.000106 0.00100 1 03/30/2024 06:31 WG2256496
4-Chlorotoluene U 0.000114 0.00100 1 03/30/2024 06:31 WG2256496
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 03/30/2024 06:31 WG2256496
1,2-Dibromoethane U 0.000126 0.00100 1 03/30/2024 06:31 WG2256496
Dibromomethane U 0.000122 0.00100 1 03/30/2024 06:31 WG2256496
1,2-Dichlorobenzene U 0.000107 0.00100 1 03/30/2024 06:31 WG2256496
1,3-Dichlorobenzene U 0.000110 0.00100 1 03/30/2024 06:31 WG2256496
1,4-Dichlorobenzene U 0.000120 0.00100 1 03/30/2024 06:31 WG2256496
Dichlorodifluoromethane U 0.000374 0.00500 1 03/30/2024 06:31 WG2256496
1,1-Dichloroethane U 0.000100 0.00100 1 03/30/2024 06:31 WG2256496
1,2-Dichloroethane U 0.0000819 0.00100 1 03/30/2024 06:31 WG2256496
1,1-Dichloroethene U 0.000188 0.00100 1 03/30/2024 06:31 WG2256496
cis-1,2-Dichloroethene U 0.000126 0.00100 1 03/30/2024 06:31 WG2256496
trans-1,2-Dichloroethene U 0.000149 0.00100 1 03/30/2024 06:31 WG2256496
1,2-Dichloropropane U 0.000149 0.00100 1 03/30/2024 06:31 WG2256496
1,1-Dichloropropene U 0.000142 0.00100 1 03/30/2024 06:31 WG2256496
1,3-Dichloropropane U 0.000110 0.00100 1 03/30/2024 06:31 WG2256496
cis-1,3-Dichloropropene U 0.000111 0.00100 1 03/30/2024 06:31 WG2256496
trans-1,3-Dichloropropene U 0.000118 0.00100 1 03/30/2024 06:31 WG2256496
2,2-Dichloropropane U 0.000161 0.00100 1 03/30/2024 06:31 WG2256496
Di-isopropyl ether U 0.000105 0.00100 1 03/30/2024 06:31 WG2256496
Ethylbenzene U 0.000137 0.00100 1 03/30/2024 06:31 WG2256496
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 03/30/2024 06:31 WG2256496
Isopropylbenzene U 0.000105 0.00100 1 03/30/2024 06:31 WG2256496
p-Isopropyltoluene U 0.000120 0.00100 1 03/30/2024 06:31 WG2256496
2-Butanone (MEK)U 0.00119 0.0100 1 03/30/2024 06:31 WG2256496
Methylene Chloride U 0.000430 0.00500 1 03/30/2024 06:31 WG2256496
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 03/30/2024 06:31 WG2256496
Methyl tert-butyl ether U 0.000101 0.00100 1 03/30/2024 06:31 WG2256496
Naphthalene U 0.00100 0.00500 1 03/30/2024 06:31 WG2256496
n-Propylbenzene U 0.0000993 0.00100 1 03/30/2024 06:31 WG2256496
Styrene U 0.000118 0.00100 1 03/30/2024 06:31 WG2256496
1,1,1,2-Tetrachloroethane U 0.000147 0.00100 1 03/30/2024 06:31 WG2256496
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 03/30/2024 06:31 WG2256496
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 03/30/2024 06:31 WG2256496
Tetrachloroethene 0.819 0.00600 0.0200 20 04/02/2024 00:14 WG2257996
Toluene U 0.000278 0.00100 1 03/30/2024 06:31 WG2256496
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 03/30/2024 06:31 WG2256496
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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SAMPLE RESULTS - 04
L1718417
MW-4
Collected date/time: 03/21/24 13:55
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 03/30/2024 06:31 WG2256496
1,1,1-Trichloroethane U 0.000149 0.00100 1 03/30/2024 06:31 WG2256496
1,1,2-Trichloroethane U 0.000158 0.00100 1 03/30/2024 06:31 WG2256496
Trichloroethene 0.000355 J 0.000190 0.00100 1 03/30/2024 06:31 WG2256496
Trichlorofluoromethane U 0.000160 0.00500 1 03/30/2024 06:31 WG2256496
1,2,3-Trichloropropane U 0.000237 0.00250 1 03/30/2024 06:31 WG2256496
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 03/30/2024 06:31 WG2256496
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 06:31 WG2256496
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 03/30/2024 06:31 WG2256496
Vinyl chloride U 0.000234 0.00100 1 03/30/2024 06:31 WG2256496
Xylenes, Total U 0.000174 0.00300 1 03/30/2024 06:31 WG2256496
(S) Toluene-d8 101 80.0-120 03/30/2024 06:31 WG2256496
(S) Toluene-d8 119 80.0-120 04/02/2024 00:14 WG2257996
(S) 4-Bromofluorobenzene 95.4 77.0-126 03/30/2024 06:31 WG2256496
(S) 4-Bromofluorobenzene 121 77.0-126 04/02/2024 00:14 WG2257996
(S) 1,2-Dichloroethane-d4 95.7 70.0-130 03/30/2024 06:31 WG2256496
(S) 1,2-Dichloroethane-d4 91.0 70.0-130 04/02/2024 00:14 WG2257996
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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SAMPLE RESULTS - 05
L1718417
MW-5
Collected date/time: 03/21/24 11:45
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 0.0113 0.0500 1 03/31/2024 03:40 WG2256764
Acrolein U 0.00254 0.0500 1 03/31/2024 03:40 WG2256764
Acrylonitrile U 0.000671 0.0100 1 03/31/2024 03:40 WG2256764
Benzene U 0.0000941 0.00100 1 03/31/2024 03:40 WG2256764
Bromobenzene U 0.000118 0.00100 1 03/31/2024 03:40 WG2256764
Bromodichloromethane U 0.000136 0.00100 1 03/31/2024 03:40 WG2256764
Bromoform U 0.000129 0.00100 1 03/31/2024 03:40 WG2256764
Bromomethane U 0.000605 0.00500 1 03/31/2024 03:40 WG2256764
n-Butylbenzene U 0.000157 0.00100 1 03/31/2024 03:40 WG2256764
sec-Butylbenzene U 0.000125 0.00100 1 03/31/2024 03:40 WG2256764
tert-Butylbenzene U 0.000127 0.00100 1 03/31/2024 03:40 WG2256764
Carbon tetrachloride U 0.000128 0.00100 1 03/31/2024 03:40 WG2256764
Chlorobenzene 0.000129 J 0.000116 0.00100 1 03/31/2024 03:40 WG2256764
Chlorodibromomethane U 0.000140 0.00100 1 03/31/2024 03:40 WG2256764
Chloroethane U 0.000192 0.00500 1 03/31/2024 03:40 WG2256764
2-Chloroethyl vinyl ether U 0.000575 0.0500 1 03/31/2024 03:40 WG2256764
Chloroform 0.00208 J 0.000111 0.00500 1 03/31/2024 03:40 WG2256764
Chloromethane U 0.000960 0.00250 1 03/31/2024 03:40 WG2256764
2-Chlorotoluene U 0.000106 0.00100 1 03/31/2024 03:40 WG2256764
4-Chlorotoluene U 0.000114 0.00100 1 03/31/2024 03:40 WG2256764
1,2-Dibromo-3-Chloropropane U 0.000276 0.00500 1 03/31/2024 03:40 WG2256764
1,2-Dibromoethane U 0.000126 0.00100 1 03/31/2024 03:40 WG2256764
Dibromomethane U 0.000122 0.00100 1 03/31/2024 03:40 WG2256764
1,2-Dichlorobenzene U 0.000107 0.00100 1 03/31/2024 03:40 WG2256764
1,3-Dichlorobenzene U 0.000110 0.00100 1 03/31/2024 03:40 WG2256764
1,4-Dichlorobenzene U 0.000120 0.00100 1 03/31/2024 03:40 WG2256764
Dichlorodifluoromethane U 0.000374 0.00500 1 03/31/2024 03:40 WG2256764
1,1-Dichloroethane U 0.000100 0.00100 1 03/31/2024 03:40 WG2256764
1,2-Dichloroethane U 0.0000819 0.00100 1 03/31/2024 03:40 WG2256764
1,1-Dichloroethene U 0.000188 0.00100 1 03/31/2024 03:40 WG2256764
cis-1,2-Dichloroethene 0.000431 J 0.000126 0.00100 1 03/31/2024 03:40 WG2256764
trans-1,2-Dichloroethene U 0.000149 0.00100 1 03/31/2024 03:40 WG2256764
1,2-Dichloropropane U 0.000149 0.00100 1 03/31/2024 03:40 WG2256764
1,1-Dichloropropene U 0.000142 0.00100 1 03/31/2024 03:40 WG2256764
1,3-Dichloropropane U 0.000110 0.00100 1 03/31/2024 03:40 WG2256764
cis-1,3-Dichloropropene U 0.000111 0.00100 1 03/31/2024 03:40 WG2256764
trans-1,3-Dichloropropene U 0.000118 0.00100 1 03/31/2024 03:40 WG2256764
2,2-Dichloropropane U 0.000161 0.00100 1 03/31/2024 03:40 WG2256764
Di-isopropyl ether U 0.000105 0.00100 1 03/31/2024 03:40 WG2256764
Ethylbenzene U 0.000137 0.00100 1 03/31/2024 03:40 WG2256764
Hexachloro-1,3-butadiene U 0.000337 0.00100 1 03/31/2024 03:40 WG2256764
Isopropylbenzene U 0.000105 0.00100 1 03/31/2024 03:40 WG2256764
p-Isopropyltoluene U 0.000120 0.00100 1 03/31/2024 03:40 WG2256764
2-Butanone (MEK)U 0.00119 0.0100 1 03/31/2024 03:40 WG2256764
Methylene Chloride U 0.000430 0.00500 1 03/31/2024 03:40 WG2256764
4-Methyl-2-pentanone (MIBK)U 0.000478 0.0100 1 03/31/2024 03:40 WG2256764
Methyl tert-butyl ether U 0.000101 0.00100 1 03/31/2024 03:40 WG2256764
Naphthalene U 0.00100 0.00500 1 03/31/2024 03:40 WG2256764
n-Propylbenzene U 0.0000993 0.00100 1 03/31/2024 03:40 WG2256764
Styrene U 0.000118 0.00100 1 03/31/2024 03:40 WG2256764
1,1,1,2-Tetrachloroethane 0.00389 0.000147 0.00100 1 03/31/2024 03:40 WG2256764
1,1,2,2-Tetrachloroethane U 0.000133 0.00100 1 03/31/2024 03:40 WG2256764
1,1,2-Trichlorotrifluoroethane U 0.000180 0.00100 1 03/31/2024 03:40 WG2256764
Tetrachloroethene 6.89 0.0750 0.250 250 04/04/2024 09:59 WG2259395
Toluene U 0.000278 0.00100 1 03/31/2024 03:40 WG2256764
1,2,3-Trichlorobenzene U 0.000230 0.00100 1 03/31/2024 03:40 WG2256764
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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SAMPLE RESULTS - 05
L1718417
MW-5
Collected date/time: 03/21/24 11:45
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 03/31/2024 03:40 WG2256764
1,1,1-Trichloroethane U 0.000149 0.00100 1 03/31/2024 03:40 WG2256764
1,1,2-Trichloroethane 0.000793 J 0.000158 0.00100 1 03/31/2024 03:40 WG2256764
Trichloroethene 0.00263 0.000190 0.00100 1 03/31/2024 03:40 WG2256764
Trichlorofluoromethane U 0.000160 0.00500 1 03/31/2024 03:40 WG2256764
1,2,3-Trichloropropane U 0.000237 0.00250 1 03/31/2024 03:40 WG2256764
1,2,4-Trimethylbenzene U 0.000322 0.00100 1 03/31/2024 03:40 WG2256764
1,2,3-Trimethylbenzene U 0.000104 0.00100 1 03/31/2024 03:40 WG2256764
1,3,5-Trimethylbenzene U 0.000104 0.00100 1 03/31/2024 03:40 WG2256764
Vinyl chloride U 0.000234 0.00100 1 03/31/2024 03:40 WG2256764
Xylenes, Total U 0.000174 0.00300 1 03/31/2024 03:40 WG2256764
(S) Toluene-d8 103 80.0-120 03/31/2024 03:40 WG2256764
(S) Toluene-d8 108 80.0-120 04/04/2024 09:59 WG2259395
(S) 4-Bromofluorobenzene 102 77.0-126 03/31/2024 03:40 WG2256764
(S) 4-Bromofluorobenzene 103 77.0-126 04/04/2024 09:59 WG2259395
(S) 1,2-Dichloroethane-d4 94.7 70.0-130 03/31/2024 03:40 WG2256764
(S) 1,2-Dichloroethane-d4 103 70.0-130 04/04/2024 09:59 WG2259395
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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QUALITY CONTROL SUMMARYWG2256496
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-01,02,03,04
Method Blank (MB)
(MB) R4052206-3 03/29/24 19:59
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
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QUALITY CONTROL SUMMARYWG2256496
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-01,02,03,04
Method Blank (MB)
(MB) R4052206-3 03/29/24 19:59
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 106 80.0-120
(S) 4-Bromofluorobenzene 96.7 77.0-126
(S) 1,2-Dichloroethane-d4 94.9 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052206-1 03/29/24 18:57 • (LCSD) R4052206-2 03/29/24 19:18
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 0.0275 0.0257 110 103 19.0-160 6.77 27
Acrolein 0.0250 0.0157 0.0152 62.8 60.8 10.0-160 3.24 26
Acrylonitrile 0.0250 0.0219 0.0236 87.6 94.4 55.0-149 7.47 20
Benzene 0.00500 0.00447 0.00429 89.4 85.8 70.0-123 4.11 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 SUMMARYWG2256496
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052206-1 03/29/24 18:57 • (LCSD) R4052206-2 03/29/24 19:18
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 0.00456 0.00443 91.2 88.6 73.0-121 2.89 20
Bromodichloromethane 0.00500 0.00443 0.00432 88.6 86.4 75.0-120 2.51 20
Bromoform 0.00500 0.00445 0.00458 89.0 91.6 68.0-132 2.88 20
Bromomethane 0.00500 0.00269 0.00242 53.8 48.4 10.0-160 10.6 25
n-Butylbenzene 0.00500 0.00469 0.00456 93.8 91.2 73.0-125 2.81 20
sec-Butylbenzene 0.00500 0.00465 0.00452 93.0 90.4 75.0-125 2.84 20
tert-Butylbenzene 0.00500 0.00481 0.00475 96.2 95.0 76.0-124 1.26 20
Carbon tetrachloride 0.00500 0.00486 0.00466 97.2 93.2 68.0-126 4.20 20
Chlorobenzene 0.00500 0.00530 0.00522 106 104 80.0-121 1.52 20
Chlorodibromomethane 0.00500 0.00500 0.00506 100 101 77.0-125 1.19 20
Chloroethane 0.00500 0.00462 0.00425 92.4 85.0 47.0-150 8.34 20
2-Chloroethyl vinyl ether 0.0250 0.0230 0.0224 92.0 89.6 51.0-160 2.64 20
Chloroform 0.00500 0.00457 0.00431 91.4 86.2 73.0-120 5.86 20
Chloromethane 0.00500 0.00386 0.00359 77.2 71.8 41.0-142 7.25 20
2-Chlorotoluene 0.00500 0.00485 0.00457 97.0 91.4 76.0-123 5.94 20
4-Chlorotoluene 0.00500 0.00488 0.00459 97.6 91.8 75.0-122 6.12 20
1,2-Dibromo-3-Chloropropane 0.00500 0.00482 0.00533 96.4 107 58.0-134 10.0 20
1,2-Dibromoethane 0.00500 0.00545 0.00513 109 103 80.0-122 6.05 20
Dibromomethane 0.00500 0.00505 0.00504 101 101 80.0-120 0.198 20
1,2-Dichlorobenzene 0.00500 0.00509 0.00492 102 98.4 79.0-121 3.40 20
1,3-Dichlorobenzene 0.00500 0.00505 0.00506 101 101 79.0-120 0.198 20
1,4-Dichlorobenzene 0.00500 0.00500 0.00471 100 94.2 79.0-120 5.97 20
Dichlorodifluoromethane 0.00500 0.00337 0.00309 67.4 61.8 51.0-149 8.67 20
1,1-Dichloroethane 0.00500 0.00451 0.00424 90.2 84.8 70.0-126 6.17 20
1,2-Dichloroethane 0.00500 0.00442 0.00433 88.4 86.6 70.0-128 2.06 20
1,1-Dichloroethene 0.00500 0.00462 0.00445 92.4 89.0 71.0-124 3.75 20
cis-1,2-Dichloroethene 0.00500 0.00516 0.00473 103 94.6 73.0-120 8.70 20
trans-1,2-Dichloroethene 0.00500 0.00487 0.00478 97.4 95.6 73.0-120 1.87 20
1,2-Dichloropropane 0.00500 0.00450 0.00417 90.0 83.4 77.0-125 7.61 20
1,1-Dichloropropene 0.00500 0.00475 0.00444 95.0 88.8 74.0-126 6.75 20
1,3-Dichloropropane 0.00500 0.00524 0.00503 105 101 80.0-120 4.09 20
cis-1,3-Dichloropropene 0.00500 0.00446 0.00443 89.2 88.6 80.0-123 0.675 20
trans-1,3-Dichloropropene 0.00500 0.00470 0.00472 94.0 94.4 78.0-124 0.425 20
2,2-Dichloropropane 0.00500 0.00414 0.00387 82.8 77.4 58.0-130 6.74 20
Di-isopropyl ether 0.00500 0.00419 0.00399 83.8 79.8 58.0-138 4.89 20
Ethylbenzene 0.00500 0.00519 0.00504 104 101 79.0-123 2.93 20
Hexachloro-1,3-butadiene 0.00500 0.00372 0.00374 74.4 74.8 54.0-138 0.536 20
Isopropylbenzene 0.00500 0.00489 0.00462 97.8 92.4 76.0-127 5.68 20
p-Isopropyltoluene 0.00500 0.00488 0.00477 97.6 95.4 76.0-125 2.28 20
2-Butanone (MEK)0.0250 0.0242 0.0243 96.8 97.2 44.0-160 0.412 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 SUMMARYWG2256496
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-01,02,03,04
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052206-1 03/29/24 18:57 • (LCSD) R4052206-2 03/29/24 19:18
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 0.00441 0.00421 88.2 84.2 67.0-120 4.64 20
4-Methyl-2-pentanone (MIBK)0.0250 0.0235 0.0239 94.0 95.6 68.0-142 1.69 20
Methyl tert-butyl ether 0.00500 0.00453 0.00449 90.6 89.8 68.0-125 0.887 20
Naphthalene 0.00500 0.00568 0.00604 114 121 54.0-135 6.14 20
n-Propylbenzene 0.00500 0.00471 0.00450 94.2 90.0 77.0-124 4.56 20
Styrene 0.00500 0.00490 0.00487 98.0 97.4 73.0-130 0.614 20
1,1,1,2-Tetrachloroethane 0.00500 0.00507 0.00493 101 98.6 75.0-125 2.80 20
1,1,2,2-Tetrachloroethane 0.00500 0.00506 0.00487 101 97.4 65.0-130 3.83 20
1,1,2-Trichlorotrifluoroethane 0.00500 0.00484 0.00482 96.8 96.4 69.0-132 0.414 20
Toluene 0.00500 0.00484 0.00482 96.8 96.4 79.0-120 0.414 20
1,2,3-Trichlorobenzene 0.00500 0.00614 0.00652 123 130 50.0-138 6.00 20
1,2,4-Trichlorobenzene 0.00500 0.00481 0.00448 96.2 89.6 57.0-137 7.10 20
1,1,1-Trichloroethane 0.00500 0.00458 0.00446 91.6 89.2 73.0-124 2.65 20
1,1,2-Trichloroethane 0.00500 0.00519 0.00517 104 103 80.0-120 0.386 20
Trichloroethene 0.00500 0.00560 0.00533 112 107 78.0-124 4.94 20
Trichlorofluoromethane 0.00500 0.00489 0.00476 97.8 95.2 59.0-147 2.69 20
1,2,3-Trichloropropane 0.00500 0.00559 0.00585 112 117 73.0-130 4.55 20
1,2,4-Trimethylbenzene 0.00500 0.00483 0.00465 96.6 93.0 76.0-121 3.80 20
1,2,3-Trimethylbenzene 0.00500 0.00479 0.00477 95.8 95.4 77.0-120 0.418 20
1,3,5-Trimethylbenzene 0.00500 0.00475 0.00459 95.0 91.8 76.0-122 3.43 20
Vinyl chloride 0.00500 0.00433 0.00413 86.6 82.6 67.0-131 4.73 20
Xylenes, Total 0.0150 0.0148 0.0146 98.7 97.3 79.0-123 1.36 20
(S) Toluene-d8 102 102 80.0-120
(S) 4-Bromofluorobenzene 95.4 95.8 77.0-126
(S) 1,2-Dichloroethane-d4 95.8 95.1 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 SUMMARYWG2256764
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-05
Method Blank (MB)
(MB) R4052479-3 03/31/24 01:17
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
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QUALITY CONTROL SUMMARYWG2256764
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-05
Method Blank (MB)
(MB) R4052479-3 03/31/24 01:17
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 106 80.0-120
(S) 4-Bromofluorobenzene 98.2 77.0-126
(S) 1,2-Dichloroethane-d4 98.4 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052479-1 03/31/24 00:13 • (LCSD) R4052479-2 03/31/24 00:34
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 0.0243 0.0251 97.2 100 19.0-160 3.24 27
Acrolein 0.0250 0.0237 0.0251 94.8 100 10.0-160 5.74 26
Acrylonitrile 0.0250 0.0231 0.0241 92.4 96.4 55.0-149 4.24 20
Benzene 0.00500 0.00529 0.00537 106 107 70.0-123 1.50 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:
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QUALITY CONTROL SUMMARYWG2256764
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052479-1 03/31/24 00:13 • (LCSD) R4052479-2 03/31/24 00:34
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 0.00497 0.00496 99.4 99.2 73.0-121 0.201 20
Bromodichloromethane 0.00500 0.00507 0.00509 101 102 75.0-120 0.394 20
Bromoform 0.00500 0.00428 0.00440 85.6 88.0 68.0-132 2.76 20
Bromomethane 0.00500 0.000955 0.00121 19.1 24.2 10.0-160 23.6 25
n-Butylbenzene 0.00500 0.00435 0.00447 87.0 89.4 73.0-125 2.72 20
sec-Butylbenzene 0.00500 0.00495 0.00507 99.0 101 75.0-125 2.40 20
tert-Butylbenzene 0.00500 0.00498 0.00522 99.6 104 76.0-124 4.71 20
Carbon tetrachloride 0.00500 0.00471 0.00478 94.2 95.6 68.0-126 1.48 20
Chlorobenzene 0.00500 0.00505 0.00520 101 104 80.0-121 2.93 20
Chlorodibromomethane 0.00500 0.00474 0.00488 94.8 97.6 77.0-125 2.91 20
Chloroethane 0.00500 0.00483 0.00521 96.6 104 47.0-150 7.57 20
2-Chloroethyl vinyl ether 0.0250 0.0229 0.0238 91.6 95.2 51.0-160 3.85 20
Chloroform 0.00500 0.00530 0.00531 106 106 73.0-120 0.189 20
Chloromethane 0.00500 0.00361 0.00364 72.2 72.8 41.0-142 0.828 20
2-Chlorotoluene 0.00500 0.00520 0.00527 104 105 76.0-123 1.34 20
4-Chlorotoluene 0.00500 0.00483 0.00479 96.6 95.8 75.0-122 0.832 20
1,2-Dibromo-3-Chloropropane 0.00500 0.00378 0.00412 75.6 82.4 58.0-134 8.61 20
1,2-Dibromoethane 0.00500 0.00492 0.00490 98.4 98.0 80.0-122 0.407 20
Dibromomethane 0.00500 0.00508 0.00507 102 101 80.0-120 0.197 20
1,2-Dichlorobenzene 0.00500 0.00478 0.00504 95.6 101 79.0-121 5.30 20
1,3-Dichlorobenzene 0.00500 0.00478 0.00483 95.6 96.6 79.0-120 1.04 20
1,4-Dichlorobenzene 0.00500 0.00476 0.00485 95.2 97.0 79.0-120 1.87 20
Dichlorodifluoromethane 0.00500 0.00490 0.00496 98.0 99.2 51.0-149 1.22 20
1,1-Dichloroethane 0.00500 0.00512 0.00521 102 104 70.0-126 1.74 20
1,2-Dichloroethane 0.00500 0.00481 0.00486 96.2 97.2 70.0-128 1.03 20
1,1-Dichloroethene 0.00500 0.00537 0.00555 107 111 71.0-124 3.30 20
cis-1,2-Dichloroethene 0.00500 0.00526 0.00529 105 106 73.0-120 0.569 20
trans-1,2-Dichloroethene 0.00500 0.00557 0.00571 111 114 73.0-120 2.48 20
1,2-Dichloropropane 0.00500 0.00474 0.00478 94.8 95.6 77.0-125 0.840 20
1,1-Dichloropropene 0.00500 0.00530 0.00548 106 110 74.0-126 3.34 20
1,3-Dichloropropane 0.00500 0.00475 0.00482 95.0 96.4 80.0-120 1.46 20
cis-1,3-Dichloropropene 0.00500 0.00461 0.00478 92.2 95.6 80.0-123 3.62 20
trans-1,3-Dichloropropene 0.00500 0.00456 0.00479 91.2 95.8 78.0-124 4.92 20
2,2-Dichloropropane 0.00500 0.00517 0.00526 103 105 58.0-130 1.73 20
Di-isopropyl ether 0.00500 0.00472 0.00485 94.4 97.0 58.0-138 2.72 20
Ethylbenzene 0.00500 0.00514 0.00522 103 104 79.0-123 1.54 20
Hexachloro-1,3-butadiene 0.00500 0.00464 0.00516 92.8 103 54.0-138 10.6 20
Isopropylbenzene 0.00500 0.00520 0.00537 104 107 76.0-127 3.22 20
p-Isopropyltoluene 0.00500 0.00513 0.00530 103 106 76.0-125 3.26 20
2-Butanone (MEK)0.0250 0.0250 0.0250 100 100 44.0-160 0.000 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:
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ACCOUNT:PROJECT:SDG:DATE/TIME:PAGE:
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QUALITY CONTROL SUMMARYWG2256764
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-05
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4052479-1 03/31/24 00:13 • (LCSD) R4052479-2 03/31/24 00:34
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 0.00532 0.00551 106 110 67.0-120 3.51 20
4-Methyl-2-pentanone (MIBK)0.0250 0.0226 0.0232 90.4 92.8 68.0-142 2.62 20
Methyl tert-butyl ether 0.00500 0.00537 0.00532 107 106 68.0-125 0.935 20
Naphthalene 0.00500 0.00405 0.00410 81.0 82.0 54.0-135 1.23 20
n-Propylbenzene 0.00500 0.00501 0.00517 100 103 77.0-124 3.14 20
Styrene 0.00500 0.00461 0.00478 92.2 95.6 73.0-130 3.62 20
1,1,1,2-Tetrachloroethane 0.00500 0.00487 0.00501 97.4 100 75.0-125 2.83 20
1,1,2,2-Tetrachloroethane 0.00500 0.00467 0.00492 93.4 98.4 65.0-130 5.21 20
1,1,2-Trichlorotrifluoroethane 0.00500 0.00512 0.00531 102 106 69.0-132 3.64 20
Toluene 0.00500 0.00520 0.00521 104 104 79.0-120 0.192 20
1,2,3-Trichlorobenzene 0.00500 0.00407 0.00437 81.4 87.4 50.0-138 7.11 20
1,2,4-Trichlorobenzene 0.00500 0.00413 0.00424 82.6 84.8 57.0-137 2.63 20
1,1,1-Trichloroethane 0.00500 0.00542 0.00534 108 107 73.0-124 1.49 20
1,1,2-Trichloroethane 0.00500 0.00505 0.00522 101 104 80.0-120 3.31 20
Trichloroethene 0.00500 0.00510 0.00523 102 105 78.0-124 2.52 20
Trichlorofluoromethane 0.00500 0.00500 0.00521 100 104 59.0-147 4.11 20
1,2,3-Trichloropropane 0.00500 0.00506 0.00529 101 106 73.0-130 4.44 20
1,2,4-Trimethylbenzene 0.00500 0.00514 0.00521 103 104 76.0-121 1.35 20
1,2,3-Trimethylbenzene 0.00500 0.00509 0.00513 102 103 77.0-120 0.783 20
1,3,5-Trimethylbenzene 0.00500 0.00499 0.00512 99.8 102 76.0-122 2.57 20
Vinyl chloride 0.00500 0.00464 0.00486 92.8 97.2 67.0-131 4.63 20
Xylenes, Total 0.0150 0.0159 0.0159 106 106 79.0-123 0.000 20
(S) Toluene-d8 104 104 80.0-120
(S) 4-Bromofluorobenzene 101 102 77.0-126
(S) 1,2-Dichloroethane-d4 97.4 99.7 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 SUMMARYWG2257996
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-01,02,03,04
Method Blank (MB)
(MB) R4052608-2 04/01/24 19:03
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Tetrachloroethene U 0.000300 0.00100
(S) Toluene-d8 108 80.0-120
(S) 4-Bromofluorobenzene 116 77.0-126
(S) 1,2-Dichloroethane-d4 115 70.0-130
Laboratory Control Sample (LCS)
(LCS) R4052608-1 04/01/24 18:25
Spike Amount LCS Result LCS Rec.Rec. Limits LCS Qualifier
Analyte mg/l mg/l %%
Tetrachloroethene 0.00500 0.00485 97.0 72.0-132
(S) Toluene-d8 106 80.0-120
(S) 4-Bromofluorobenzene 107 77.0-126
(S) 1,2-Dichloroethane-d4 109 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 SUMMARYWG2259395
Volatile Organic Compounds (GC/MS) by Method 8260B L1718417-05
Method Blank (MB)
(MB) R4053885-4 04/04/24 09:28
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Tetrachloroethene U 0.000300 0.00100
(S) Toluene-d8 105 80.0-120
(S) 4-Bromofluorobenzene 102 77.0-126
(S) 1,2-Dichloroethane-d4 100 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)
(LCS) R4053885-1 04/04/24 08:02 • (LCSD) R4053885-2 04/04/24 08:23
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 0.00556 0.00535 111 107 72.0-132 3.85 20
(S) Toluene-d8 106 104 80.0-120
(S) 4-Bromofluorobenzene 102 99.1 77.0-126
(S) 1,2-Dichloroethane-d4 97.7 103 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.
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
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California 2932 New Mexico ¹TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
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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
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Missouri 340 Wisconsin 998093910
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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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