DERR-2024-006343

6952 South High Tech Drive Ste. B
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials 1
Cover Page
Quarterly Groundwater Monitoring
Report; March 2024
Brent Redd Property
148 East Center Street Monticello, Utah
Facility ID #5000003 Release ID GZQ
April 10, 2024 | Terracon Project No. AL067003
Prepared for:
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
Salt Lake City, Utah
6952 South High Tech Drive Ste. B
Midvale, Utah 84047
P [phone]
Terracon.com
Facilities | Environmental | Geotechnical | Materials i
Cover Letter
April 10, 2024
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West
Salt Lake City, Utah 84114
Attn: Mr. Mark Crim
E:[e-mail]
Re:Quarterly Groundwater Monitoring Report – March 2024
Brent Redd Facility
148 East Center Street, Monticello, Utah
Facility Identification No. 5000003, Release ID GZQ
Terracon Project No. AL067003
Dear Mr. Crim:
Terracon Consultants, Inc. (Terracon) is pleased to submit this Quarterly Groundwater
Monitoring Report documenting the third quarterly groundwater sampling event conducted
under Work Assignment GZQ-57 at the Brent Redd facility (Facility ID 5000003, Release ID
GZQ), located at 148 East Center Street, Monticello, Utah.
Terracon has performed this work pursuant to Work Plan GZQ-56-TER dated August 21, 2023.
This work was conducted under Terracon's contract (Contract Number 216383) with the
Division of Environmental Response and Remediation.
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
Utah-Certified UST Consultant #0238
Amy Austin
Facilities | Environmental | Geotechnical | Materials ii
Table Of Contents
1.0 Introduction ................................................................................ 1
1.1 Site Description ..................................................................................... 1
1.2 Scope of Services ................................................................................... 1
1.3 Standard of Care .................................................................................... 1
1.4 Additional Scope Limitations .................................................................... 1
1.5 Reliance ................................................................................................ 2
2.0 Groundwater Sampling Event......................................................... 2
2.1 Groundwater Sample Collection ............................................................... 2
2.2 General Observations ............................................................................. 2
3.0 Laboratory Analytical Methods ....................................................... 3
4.0 Data Evaluation ........................................................................... 3
4.1 Groundwater Sample Results ................................................................... 3
4.2 Quality Control ....................................................................................... 4
5.0 Findings And Conclusions .............................................................. 4
Facilities | Environmental | Geotechnical | Materials iii
APPENDICES
Appendix A Exhibits
Exhibit 1:Topographic Site Overview
Exhibit 2:Site Diagram
Exhibit 3:Groundwater Elevation Map, March 2024
Exhibit 4: TPH-GRO Concentrations, March 2024
Exhibit 5: TPH-DRO Concentrations, March 2024
Exhibit 6:Benzene Concentrations, March 2024
Appendix B Data Tables
Table 1:Well Construction and Groundwater Elevation Data
Table 2:Groundwater Analytical Results
Appendix C Chain of Custody and Laboratory Data Sheets
Groundwater Monitoring Report; 3RD Event
Brent Redd | Monticello, Utah
April 10, 2024 | Terracon Project No. AL067003
Facilities | Environmental | Geotechnical | Materials 1
1.0 Introduction
1.1 Site Description
Terracon conducted a groundwater monitoring event at the Brent Redd facility (Facility ID
5000003, Release ID GZQ), located at 148 East Center Street, Monticello, Utah. Exhibit 1
(Appendix A) presents a topographic map of the area. Exhibit 2 (Appendix A) is a site
diagram that shows monitoring well locations.
1.2 Scope of Services
The work objective of Work Assignment GZQ-57-TER was to collect groundwater samples
from eleven existing on- and off-site monitoring wells to assess the current groundwater
conditions. This is the THIRD event of six quarterly groundwater monitoring events under
Work Assignment GZQ-57-TER.
1.3 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.
1.4 Additional Scope Limitations
Findings, conclusions, and recommendations resulting from these services are based upon
information derived from the on-site activities and other services performed under this
scope of 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.
Groundwater Monitoring Report; 3RD Event
Brent Redd | Monticello, Utah
April 10, 2024 | Terracon Project No. AL067003
Facilities | Environmental | Geotechnical | Materials 2
1.5 Reliance
This report has been prepared for the exclusive use and reliance of the Utah Department of
Environmental Quality (UDEQ). Use or reliance by any other party is prohibited without the
written authorization of the UDEQ 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 20, 2024, Terracon collected groundwater samples from eleven monitoring wells
located at the site and a down-gradient property (Monticello Inn): Groundwater samples
were collected from monitoring wells B-3R, MW-5R, MW-7, MW-14, MW-15, MW-16, MW-17,
MW-18, MW-19, MW-20, and MW-21. Two quality control samples consisting of a trip blank
and a field blank, were also collected.
Prior to collecting the groundwater samples, each well was purged of three well volumes to
remove stagnant water from the well casings prior to sampling. Monitoring wells B-3R, MW-
15, and MW-16 were purged dry, then allowed to recover prior to sampling. A slight sheen
was observed on the purge water from monitoring well B-3R. Purge water was thin spread
across the surface in the vicinity of the well that generated the water 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, other monitoring wells, utilities, etc.) or
residential property.
2.2 General Observations
Depth-to-water measurements and groundwater elevations are presented in Table 1
(Appendix B). Groundwater elevations at the site were measured to range between 7030.52
and 7036.07 feet above mean sea level (msl).
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 east (Exhibit 3, Appendix A). The calculated
groundwater gradient and associated flow direction were generally consistent with the flow
directions observed during previous monitoring events. Free product was not observed in
any monitoring wells during this sampling event. Groundwater levels were significantly
Groundwater Monitoring Report; 3RD Event
Brent Redd | Monticello, Utah
April 10, 2024 | Terracon Project No. AL067003
Facilities | Environmental | Geotechnical | Materials 3
higher than the previous quarters and extended above the well screen level in some wells.
This may be the reason there is some variation in groundwater contours and gradient.
Terracon had previously installed passive light non-aqueous phase liquid (LNAPL) recovery
equipment: Durham Geo SoakEase product-selective absorbent socks and stainless-steel
canisters in monitoring wells B-3R and MW-7. The absorbent socks were removed during
past sampling events. Product was not observed in these wells during this event and the
absorbent socks were not replaced.
3.0 Laboratory Analytical Methods
All groundwater samples were collected and placed in laboratory-prepared containers,
labeled, and placed on ice in a cooler and transported to Chemtech-Ford Laboratory in
Sandy, Utah.
The groundwater samples were submitted for analysis of methyl tertiary-butyl ether,
benzene, toluene, ethylbenzene, total xylenes, and naphthalene (MBTEXN) and total
petroleum hydrocarbons gasoline-range organics (TPH-GRO) using EPA Method 8260B, and
total petroleum hydrocarbons diesel-range organics (TPH-DRO) using EPA Method 8015C.
The field blank and trip blank were analyzed for MBTEXN and TPH-GRO.
The samples were analyzed using the following methods:
Analysis Sample type No. Of
Samples Laboratory method
BTEXN, MTBE and TPH-
GRO Groundwater 13 EPA Method 8260B
TPH-DRO Groundwater 11 EPA Method 8015C
The executed chain-of-custody form and laboratory data sheets are provided in Appendix C.
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), petroleum hydrocarbons were reported above the
laboratory method reporting limits in eight of the wells sampled.
Groundwater Monitoring Report; 3RD Event
Brent Redd | Monticello, Utah
April 10, 2024 | Terracon Project No. AL067003
Facilities | Environmental | Geotechnical | Materials 4
TPH-GRO concentrations exceeded the Initial Screening Level (ISL) in monitoring
wells MW-7 and MW-15. TPH-GRO concentrations exceeded the Tier 1 Screening
Level in monitoring wells B-3R, MW-16, and MW-17.
TPH-DRO concentrations exceeded the ISL in monitoring wells B-3R, MW-7, MW-16,
MW-17, and MW-18. No concentration exceeded the Tier 1 Screening Level for TPH-
DRO.
Benzene concentrations exceeded the ISL in monitoring well MW-7. Benzene
concentrations exceeded the Tier 1 Screening Level in monitoring wells MW-3R, MW-
5R, MW-15, MW-16, and MW-17.
Isoconcentration contour maps for TPH-GRO, TPH-DRO, and benzene are presented as
Exhibits 4, 5, and 6 (Appendix A), respectively.
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 quality control samples
(field and trip blank) did not report constituents above laboratory reporting limits.
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. Naphthalene was flagged in MW-18 a MS-Low qualifier, which indicates
the reported concentration is low due to Matrix Spike recovery. As naphthalene
concentrations reported in this sample was well below regulatory screening levels, this
qualifier is not likely to affect the usability of the data.
5.0 Findings And Conclusions
Petroleum hydrocarbon concentrations remain elevated at the site and at the property
boundaries. Monitoring wells B-3R, MW-16, and MW-17 continue to exhibit the highest
petroleum constituent concentrations across the site. Free product had previously been
observed in monitoring wells B-3R, MW-5, MW-7, and MW-16 between 2002 and 2013. Free
product was not observed for this event.
For the 2022 and 2023 groundwater monitoring events, fluctuating concentrations of
benzene and TPH exceeding ISLs were shown to migrate past the north and eastern
Groundwater Monitoring Report; 3RD Event
Brent Redd | Monticello, Utah
April 10, 2024 | Terracon Project No. AL067003
Facilities | Environmental | Geotechnical | Materials 5
property boundary, as demonstrated by analytical results from well MW-5R on the north
property boundary and MW-7 located on the eastern-adjoining Monticello Inn property.
For this current event, concentrations of dissolved benzene and TPH were reported that
exceed the ISLs both on the property and extend off-site onto the east adjoining property.
The concentration of TPH-GRO exceeded the Tier 1 Screening Level on the site down-
gradient of the source and exceeded the ISL off-site. The concentration of TPH-DRO
exceeded the ISL both on-site and off-site. The concentration of benzene exceeded the Tier
1 Screening Level both on the property and to the north and the ISL to east. As
groundwater levels were significantly higher than the previous quarters and extended above
the well screen level in some wells, there is some variation in groundwater concentrations of
petroleum hydrocarbons.
Concentrations of dissolved petroleum hydrocarbons exceeding UDEQ screening levels
persist on the property and off-site. A review of historical data shows periodic fluctuation of
petroleum hydrocarbon concentrations in groundwater across the site. Unstable
concentrations of the dissolved petroleum constituents observed may be associated with
changing groundwater elevations. High dissolved phase concentrations of benzene and TPH
observed at monitoring wells B-3R, MW-16, and MW-17 suggest a petroleum hydrocarbon
source may remain in the subsurface.
Appendix A
Exhibits
Appendix B
Data Tables
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
99.42 11/08/91 15.76 83.66
10/10/95 10.41 7,036.73
02/01/96 14.49 7,032.65
09/10/96 15.71 7,031.43
12/10/96 14.54 7,032.60
03/12/97 9.70 7,037.44
06/12/97 9.28 7,037.86
10/01/97 10.36 7,036.78
12/10/97 12.51 7,034.63
03/26/98 11.39 7,035.75
07/14/98 10.82 7,036.32
01/11/99 13.30 7,033.84
04/28/99 12.35 7,034.79
07/20/99 12.44 7,034.70
10/13/99 12.38 7,034.76
05/24/00 13.15 7,033.99
08/09/00 12.76 7,034.38
11/07/00 12.42 7,034.72
02/08/01 13.49 7,033.65
05/08/01 13.00 7,034.14
08/14/01 12.33 7,034.81
08/05/02 17.43 7,029.71
11/13/02 18.41 7,028.74
12/05/02 18.94 7,028.20
01/19/03 19.42 7,027.72
02/19/03 19.58 7,027.56
03/20/03 17.00 7,030.14
05/27/03 19.34 7,027.80
03/23/04 18.93 7,028.21
10/10/06 10.79 7,036.35
05/08/07 14.42 7,032.72
11/12/09 14.28 7,032.86
06/29/10 9.82 7,037.32
02/14/13 16.81 7,030.33
09/10/13 17.82 7,029.32
11/19/13 17.85 7,029.29
07/23/14 19.15 7,027.99
05/14/15 15.13 7,032.01
05/03/16 13.42 7,033.72
11/18/16 15.68 7,031.46
06/06/18 18.88 7,028.26
04/16/19 10.32 7,036.82
10/09/19 NM --
01/27/22 NM --
7047.62 05/24/00 13.87 7,033.75
08/09/00 13.90 7,033.62
11/07/00 13.19 7,034.33
02/08/01 15.28 7,032.24
05/08/01 13.50 7,034.02
08/14/01 12.85 7,034.67
08/05/02 17.93 7,029.59
11/13/02 18.96 7,028.56
12/05/02 19.15 7,028.37
01/19/03 NM NM
02/19/03 NM LNAPL
03/20/03 17.82 7,029.70
05/27/03 NM LNAPL
03/23/04 19.53 7,027.99
10/09/06 11.90 7,035.62
05/08/07 14.99 LNAPL (0.03')
11/12/09 14.69 7,032.83
06/29/10 10.33 7,037.19
02/14/13 17.32 LNAPL (0.07')
09/10/13 18.29 LNAPL (0.10')
11/18/13 18.31 LNAPL (0.07')
07/23/14 19.84 7,027.68
05/14/15 15.81 7,031.71
05/03/16 14.20 7,033.32
11/18/16 16.08 7,031.44
06/06/18 19.31 7,028.21
04/16/19 10.93 7,036.59
10/09/19 15.64 7,031.88
06/25/20 16.32 7,031.20
01/27/22 19.52 7,028.00
04/21/22 19.48 7,028.04
07/28/22 19.70 7,027.82
10/20/22 19.50 7,028.02
09/26/23 14.45 7,033.07
12/12/23 15.62 7,031.90
03/20/24 12.38 7,035.14
B-3R 2 10-20 20.00 7047.52
B-2 7047.1438.7322-374
Well Abandoned
Page 1 of 6 Terracon Consultants
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
10/11/95 10.43 7,034.67
02/01/96 14.46 7,030.64
06/21/96 15.61 7,029.49
09/10/96 15.50 7,029.60
12/10/96 14.50 7,030.60
03/12/97 10.28 7,034.82
06/12/97 9.26 7,035.84
10/01/97 10.27 7,034.83
12/10/97 12.43 7,032.67
03/26/98 11.50 7,033.60
07/14/98 9.85 7,035.25
01/11/99 13.38 7,031.72
04/28/99 12.87 7,032.23
07/20/99 12.62 7,032.48
10/13/99 12.52 7,032.58
05/24/00 13.25 7,031.85
08/09/00 12.84 7,032.26
11/07/00 12.86 7,032.24
02/08/01 14.93 7,030.17
05/08/01 13.20 7,031.90
08/14/01 11.50 7,033.60
08/05/02 17.18 7,027.92
11/13/02 18.50 7,026.60
12/05/02 18.57 7,026.53
01/19/03 19.01 7,026.09
02/19/03 19.24 7,025.86
03/20/03 16.81 7,028.29
05/27/03 18.85 7,026.25
03/23/04 18.28 7,026.82
10/09/06 11.43 LNAPL (0.11')
05/08/07 14.50 LNAPL (0.15')
11/12/09 14.06 LNAPL (0.01')
06/29/10 9.84 7,035.26
02/14/13 16.58 7,028.52
09/10/13 16.03 7,029.07
11/18/13 17.49 7,027.61
07/22/14 18.66 7,026.44
05/14/15 15.12 7,029.98
05/03/16 13.70 7,031.40
11/18/16 15.60 7,029.50
06/06/18 NM --
04/16/19 NM --
10/09/19 NM --
01/27/22 18.30 7,026.42
04/21/22 18.11 7,026.61
07/28/22 19.22 7,025.50
10/20/22 18.34 7,026.38
09/26/23 13.17 7,031.55
12/12/23 14.15 7,030.57
03/20/24 10.67 7,034.05
29.64 7044.72
4 8-23
MW-5R 2 10-30
7045.10
Well Abandoned
22.97
MW-5
Well Casing
Damaged
Page 2 of 6 Terracon Consultants
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
10/11/95 10.25 7,030.79
02/01/96 14.31 7,026.73
06/21/96 14.92 7,026.12
09/10/96 15.05 7,025.99
12/10/96 14.51 7,026.53
03/12/97 9.83 7,031.21
06/12/97 8.72 7,032.32
10/01/97 9.97 7,031.07
12/10/97 12.24 7,028.80
03/26/98 11.35 7,029.69
07/14/98 9.99 7,031.05
01/11/99 13.03 7,028.01
04/28/99 12.46 7,028.58
07/20/99 11.84 7,029.20
10/13/99 11.91 7,029.13
05/24/00 12.49 7,028.55
08/09/00 12.36 7,028.68
11/07/00 12.82 7,028.22
02/08/01 14.67 7,026.37
05/08/01 12.80 7,028.24
08/14/01 12.10 7,028.94
08/05/02 16.75 7,024.29
11/13/02 16.70 7,024.34
12/05/02 18.03 7,023.01
01/19/03 NM NM
02/19/03 18.45 7,022.59
03/20/03 NM NM
05/27/03 NM NM
03/23/04 NM NM
11/12/09 14.36 LNAPL (0.05')
06/29/10 9.61 7,031.43
02/14/13 NM NM
09/10/13 16.09 LNAPL (0.01')
11/18/13 16.53 LNAPL (0.03')
07/22/14 17.82 7,023.22
05/13/15 14.68 7,026.36
05/03/16 13.42 7,027.62
11/18/16 15.52 7,025.52
6/6/2018 17.81 7,023.23
4/16/2019 9.95 7,031.09
10/09/19 14.05 7,026.99
06/25/20 14.57 7,026.47
01/27/22 17.99 7,023.05
04/21/22 17.68 7,023.36
07/28/22 18.45 7,022.59
10/20/22 18.00 7,023.04
09/26/23 12.96 7,028.08
12/12/23 13.19 7,027.85
03/20/24 8.70 7,032.34
MW-7 4 8-23 22.61 7041.04
Page 3 of 6 Terracon Consultants
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
05/24/00 12.99 7,034.73
08/09/00 12.64 7,035.08
11/07/00 12.30 7,035.42
02/08/01 14.20 7,033.52
05/08/01 12.70 7,035.02
08/14/01 11.98 7,035.74
08/05/02 17.04 7,030.68
11/13/02 18.10 7,029.63
12/05/02 18.66 7,029.07
01/19/03 19.19 7,028.53
02/19/03 19.42 7,028.31
03/20/03 17.06 7,030.66
05/27/03 19.21 7,028.51
03/23/04 18.93 7,028.79
10/10/06 10.95 7,036.77
05/09/07 13.92 7,033.80
11/12/09 13.96 7,033.76
06/29/10 9.43 7,038.29
02/14/13 16.58 7,031.14
09/10/13 17.57 7,030.15
11/19/13 17.67 7,030.05
07/23/14 18.95 7,028.77
05/14/15 15.01 7,032.71
05/03/16 13.29 7,034.43
11/18/16 15.26 7,032.46
06/06/18 18.62 7,029.10
04/16/19 10.33 7,037.39
10/09/19 14.66 7,033.06
06/25/20 15.38 7,032.34
01/27/22 19.21 7,028.51
04/21/22 19.16 7,028.56
07/28/22 20.44 7,027.28
10/20/22 19.38 7,028.34
09/26/23 13.75 7,033.97
12/12/23 14.95 7,032.77
03/20/24 11.65 7,036.07
05/27/03 19.61 7,026.96
03/23/04 19.22 7,027.35
10/09/06 12.41 7,034.16
05/08/07 15.10 LNAPL (0.01')
05/05/16 14.34 7032.23
11/18/16 15.98 7,030.59
06/06/18 19.39 7,027.18
04/16/19 10.63 7,035.94
10/09/19 15.33 7,031.24
06/25/20 16.12 7,030.45
01/27/22 19.66 7,026.91
04/21/22 19.51 7,027.06
07/28/22 20.76 7,025.81
10/20/22 19.77 7,026.80
09/26/23 14.40 7,032.17
12/12/23 15.59 7,030.98
03/20/24 12.89 7,033.68
05/27/03 20.06 7,026.81
03/23/04 19.66 7,027.21
10/09/06 12.38 7,034.49
05/08/07 14.52 LNAPL (0.02')
11/12/09 15.06 LNAPL (0.01')
06/29/10 10.62 LNAPL (0.01')
02/14/13 17.59 7,029.28
09/10/13 15.16 7,031.71
11/19/13 18.56 7,028.31
07/22/14 19.76 7,027.11
05/14/15 16.10 7,030.77
05/03/16 14.55 7,032.32
11/18/16 16.42 7,030.45
06/06/18 19.64 7,027.23
04/16/19 11.05 7,035.82
10/09/19 15.73 7,031.14
06/25/20 16.43 7,030.44
01/27/22 20.01 7,026.86
04/21/22 19.85 7,027.02
07/28/22 21.07 7,025.80
10/20/22 20.12 7,026.75
09/26/23 14.80 7,032.07
12/12/23 15.88 7,030.99
03/20/24 12.71 7,034.16
7047.72
MW-15 4 12-22 22.7 7046.57
MW-14 2 13-23 22.75
MW-16 4 12.5-22.5 22.82 7046.87
Page 4 of 6 Terracon Consultants
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
05/27/03 20.28 7,026.29
03/23/04 19.77 7,026.80
10/09/06 12.31 7,034.26
05/08/07 15.42 7,031.15
11/12/09 15.63 7,030.94
06/29/10 11.12 7,035.45
02/14/13 17.79 7,028.78
09/10/13 18.60 7,027.97
11/19/13 18.72 7,027.85
07/22/14 19.93 7,026.64
05/13/15 15.30 7,031.27
05/04/16 14.71 7,031.86
11/18/16 16.87 7,029.70
06/06/18 19.84 7,026.73
04/16/19 11.34 7,035.23
10/09/19 16.08 7,030.49
06/25/20 18.73 7,027.84
01/27/22 19.90 7,026.67
04/21/22 19.75 7,026.82
07/28/22 20.92 7,025.65
10/20/22 20.04 7,026.53
09/26/23 14.84 7,031.73
12/12/23 15.82 7,030.75
03/20/24 12.13 7,034.44
05/27/03 18.49 7,025.89
03/23/04 17.96 7,026.42
10/09/06 10.56 7,033.82
05/08/07 14.09 7,030.29
11/12/09 14.04 7,030.34
06/29/10 9.36 7,035.02
02/14/13 15.97 7,028.41
09/10/13 16.75 7,027.63
11/19/13 16.89 LNAPL (0.01')
07/22/14 18.06 7,026.32
05/14/15 14.49 7,029.89
05/04/16 12.95 7,031.43
11/18/16 15.17 7,029.21
06/06/18 18.01 7,026.37
04/16/19 9.19 7,035.19
10/09/19 14.24 7,030.14
06/25/20 14.89 7,029.49
01/27/22 18.29 7,026.09
04/21/22 18.09 7,026.29
07/28/22 19.21 7,025.17
10/20/22 18.35 7,026.03
09/26/23 13.19 7,031.19
12/12/23 14.14 7,030.24
03/20/24 9.41 7,034.97
01/27/22 19.09 7,026.18
04/21/22 18.89 7,026.38
07/28/22 20.08 7,025.19
10/20/22 19.25 7,026.02
09/26/23 14.12 7,031.15
12/12/23 15.05 7,030.22
03/20/24 10.97 7,034.30
MW-17 2 6.5-26.5 25.975 7046.57
MW-19 2 10-30 29.70 7045.27
MW-18 2 5-25 24.78 7044.38
Page 5 of 6 Terracon Consultants
Table 1
Brett Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
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)
01/27/22 17.27 7,023.64
04/21/22 16.94 7,023.97
07/28/22 17.65 7,023.26
10/20/22 17.28 7,023.63
09/26/23 12.22 7,028.69
12/12/23 12.69 7,028.22
03/20/24 8.61 7,032.30
01/27/22 18.72 7,018.95
04/21/22 18.20 7,019.47
07/28/22 18.50 7,019.17
10/20/22 18.49 7,019.18
09/26/23 12.87 7,024.80
12/12/23 12.46 7,025.21
03/20/24 7.15 7,030.52
NOTES:
ft-bgs = Feet below ground surface.
ft-btoc = Feet below top of casing.
NM = Not measured.
LNAPL = Light non-aqueous phase liquid
MW-20 2 10-30 30.00 7040.91
MW-21 2 7037.6727.758-28
Page 6 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
11/08/91 15.76 <200 NA NA 40.8 39.7 23 61.2 <5
10/10/95 10.41 <500 NA NA 18.7 2.4 <2 9.3 <2
02/01/96 14.49 <500 NA NA 12.8 <2 <2 <6 <2
09/10/96 15.71 <500 NA NA <2 13.5 5.2 39.4 4
12/10/96 14.54 <500 NA NA 23.6 <2 <2 <6 <2
03/12/97 9.70 1,500 NA 456 302 <10 <10 <30 <10
06/12/97 9.28 <500 NA 218 235 5.6 7.8 9.7 <2
10/01/97 10.36 <500 NA 115 137 3.5 6.4 <6 <2
12/10/97 12.51 <500 NA 95.2 53.9 <2 2.4 <6 <2
03/26/98 11.39 <500 NA 72.2 32.1 <2 <2 <6 <2
07/14/98 10.82 <500 NA 89.5 146 <2 <2 <6 <2
01/11/99 13.30 <500 NA 334 80.9 <2 <2 <6 <2
04/28/99 12.35 <500 NA 242 54.5 <2 <2 <6 <2
07/20/99 12.44 <500 NA 166 122 <2 <2 <6 <2
10/13/99 12.38 <500 NA 109 82.5 <2 <2 <6 <2
05/24/00 13.15 3,800 NA 199 1,100 27.3 13.5 69.9 <10
08/09/00 12.76 1,800 NA 209 684 19.3 19.0 22.4 <2
11/07/00 12.42 6,300 NA 123 1,280 62.6 29.2 57.6 <5
02/08/01 13.49 <500 NA 60.3 74.1 4.6 2.9 <6 <2
05/08/01 13.00 3,000 NA 236 885 46.5 51.8 58.9 6.0
08/14/01 12.33 <500 NA 125 32.3 <2 2.1 <6 3.2
08/08/02 17.43 <500 <500 147 <2 5.0 <10 <30 <10
11/14/02 18.41 <500 <500 86.7 <2 <2 <2 <6 <2
02/19/03 19.58 <500 <500 83.8 12.6 <2 <2 <6 <2
05/28/03 19.34 <500 <500 <2 4.6 <2 <2 <6 <2
03/24/04 18.93 <500 <500 94 22 3 <2 <6 <2
10/10/06 10.79 54 <2,000 194 10 <1 <1 <3 <1
05/08/07 14.42 <50 <2,000 376 2 <1 <1 <3 <1
11/12/09 14.28 <20 <500 710 16 <2 <2 <2 <2
06/29/10 9.82 1,300 636 523 1,260 <2 5.99 4.81 3.37
02/14/13 16.81 <50 <1,000 109 <1 <1 <1 <3 <2
09/10/13 17.82 <50 <1,000 22 <1 <1 <1 <3 <2
11/16/13 17.85 <50 <1,000 5 <1 <1 <1 <3 <2
07/22/14 19.15 <50 <1,000 1 <1 <1 <1 <3 <2
05/14/15 15.13 <50 <1,000 2 1 <1 1 6 2
05/03/16 13.42 <222 <1,000 9 <2 <5 <5 <5 <5
11/18/16 15.68 <50 <1,000 <2 <2 <5 <5 <5 <5
06/06/18 18.88 <125 <1,000 7 <5 <12 <12 <12 <12
04/16/19 10.32 <125 <1,000 59 15 <12 <12 <12 <12
10/09/19 NM
06/25/20 NM
05/24/00 13.87 114,000 NA <200 17,300 9,500 727 8,160
08/09/00 13.90 149,100 NA <100 18,200 7,830 989 8,660 240
11/07/00 13.19 115,500 NA <100 18,200 5,790 826 6,910 181
02/08/01 15.28 118,600 NA <500 19,500 10,200 1,010 8,440 <500
05/08/01 13.50 92,700 NA <100 15,100 11,400 672 6,890 213
08/14/01 12.85 120,800 NA <200 20,700 18,200 647 9,110 350
08/08/02 17.93 139,000 7,700 <1,000 25,100 18,500 968 9,510 <1,000
11/13/02 18.96
02/19/03 NM
05/27/03 NM
03/23/04 19.53
10/09/06 11.90 74,600 <2,000 <5 19,200 8,970 1,130 9,720 338
05/08/07 14.99
11/12/09 14.69 50,000 12,000 <40 18,000 2,500 1,400 10,000 380
06/29/10 10.33 47,900 29,200 <20 23,600 1,390 1,360 11,000 418
02/14/13 17.32
09/10/13 18.29
11/18/13 18.31
07/22/14 19.84
05/14/15 15.81 43,500 3,600 <1 17,100 277 1,050 9,580 443
05/03/16 14.20 30,100 4,700 <5 11,800 176 810 6,380 390
11/18/16 16.08 36,000 8,900 <200 12,700 <500 1,210 8,600 <500
06/06/18 19.31 36,200 10,300 <5 10,100 194 1,050 6,840 406
04/17/19 10.93 32,300 16,400 <5 5,620 125 1,150 6,060 375
10/09/19 15.64 39,000 15,400 <5 6,850 154 1,520 9,440 406
06/25/20 16.32 29,700 9,000 <100 8,040 <250 1,070 6,760 318
01/27/22 19.52
04/21/22 19.48
07/28/22 19.70
10/20/22 19.50
09/27/23 14.45 26,300 7,000 <5 5,930 80 1,200 5,080 313
12/12/23 15.62
25,300 8,900 <5 5,440 103 1,070 4,980 319
03/20/24 12.38
27,700 8,300 <50 4,090 <125 1,170 4,950 398
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
LNAPL
LNAPL
LNAPL
Insufficient water column
LNAPL
B-3R
Not sampled as per Work Assignment GZQ-49-TER
Not sampled as per Work Assignment GZQ-49-TER
B-2
Insufficient water column
Insufficient water column
LNAPL
Insufficient water column
LNAPL
LNAPL
LNAPL
Not Sampled - purged dry with no recovery after 24 hours
Well abandoned
Page 1 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
10/11/95 10.43 94,800 NA NA 17,200 12,300 2,110 8,880 <400
02/01/96 14.46 55,700 NA NA 14,300 5,520 1,080 5,670 620
06/21/96 15.61 49,800 NA NA 17,000 5,100 1,180 5,120 249
09/10/96 15.50 35,300 NA NA 14,800 4,160 1,050 4,610 214
12/10/96 14.50 49,500 NA NA 17,400 5,460 1,160 5,930 315
03/12/97 10.28 49,200 NA <100 21,500 7,340 1,290 6,700 316
06/12/97 9.26 43,400 NA <175 18,000 3,170 1,060 4,830 422
10/01/97 10.27 50,200 NA <25 17,360 6,250 1,240 6,680 415
12/10/97 12.43 54,300 NA <143 25,300 8,400 1,510 8,400 405
03/26/98 11.50 48,800 NA <100 22,200 6,870 1,380 7,150 323
07/14/98 9.85 48,400 NA <200 24,100 9,370 1,340 7,280 275
01/11/99 13.38 38,700 NA <100 22,800 7,450 1,510 7,180 441
04/28/99 12.87 136,000 NA <100 14,100 5,310 1,120 5,770 384
07/20/99 12.62 41,100 NA <100 22,900 6,650 1,460 6,910 361
10/13/99 12.52 32,400 NA <200 20,300 4,840 1,250 6,150 429
05/24/00 13.25 92,800 NA <200 19,100 4,330 987 4,840 271
08/09/00 12.84 17,100 NA <20 2,710 720 112 937 44.3
11/07/00 12.86 39,800 NA <100 17,400 3,900 1,050 4,710 183
02/08/01 14.93 90,400 NA <500 19,000 4,060 1,070 4,980 1,040
05/08/01 13.20 79,300 NA <100 17,300 4,560 1,110 5,160 246
08/16/01 11.50 82,300 NA <100 19,000 5,910 1,280 6,060 266
08/08/02 17.18 104,000 2,900 <400 20,100 5,960 1,600 8,630 <400
11/13/02 18.50
02/19/03 19.24
05/27/03 18.85
03/23/04 18.28
10/09/06 11.43
05/08/07 14.50
11/12/09 14.04
06/29/10 9.84 25,400 39,600 <20 442 477 1,330 8,930 581
02/14/13 16.58 17,700 178,000 <20 2100 103 898 6,050 1,330
09/10/13 16.03 11,200 2,000 <20 749 105 631 4,440 263
11/18/13 17.49 13,600 2,400 <5 1,110 118 743 5,620 296
07/22/14 18.66 12,800 4,300 <5 1,040 109 665 3,340 326
05/14/15 15.12 7,560 1,800 <1 614 32 317 1,950 194
05/03/16 13.70 10,600 3,100 <5 614 24 470 2,620 247
11/18/16 15.60 17,200 4,300 <100 2,770 <250 935 4,820 <250
06/06/18 NM
04/17/19 NM
10/09/19 NM
06/25/20 NM
01/27/22 18.30 3,980 1,100 <5 754 <12 332 772 62
04/21/22 18.11 4,490 1,400 <5 679 <12 388 856 74
07/28/22 19.22 1,920 <1,000 <5 482 <12 157 281 31
10/20/22 18.34 2,190 <1,000 <5 466 <12 184 329 21
09/27/23 13.17 1,920 <1,000 <5 601 <12 117 162 <12
12/12/23 14.15
1,130 <1,000 <5 495 <12 99 91 12
03/20/24 10.67
969 <1,000 <5 340 <12 79 96 12
LNAPL
Well abandoned
LNAPL
LNAPL
LNAPL
LNAPL
Not Sampled - well casing damaged and debris in well
MW-5R
MW-5
Not Sampled - well casing damaged and debris in well
Not Sampled - well casing damaged and debris in well
LNAPL
LNAPL
Not Sampled - well casing damaged and debris in well
Page 2 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
10/11/95 10.25 <500 NA NA <2 <2 <2 <6 <2
02/01/96 14.31 <500 NA NA <2 <2 <2 <6 <2
06/21/96 14.92 <500 NA NA <2 <2 <2 <6 <2
09/10/96 15.05 <500 NA NA <2 <2 <2 <6 <2
12/10/96 14.51 <500 NA NA <2 <2 <2 <6 <2
03/12/97 9.83 <500 NA 403 12.9 <2 <2 <6 <2
06/12/97 8.72 <500 NA 750 3.4 <2 <2 <6 <2
10/01/97 9.97 <500 NA 306 <2 <2 <2 <6 <2
12/10/97 12.24 <500 NA 276 <2 <2 <2 <6 <2
03/26/98 11.35 <500 NA 261 <2 <2 <2 <6 <2
07/14/98 9.99 <500 NA 167 <2 <2 <2 <6 <2
01/11/99 13.03 <500 NA 102 <2 <2 <2 <6 <2
04/28/99 12.46 <500 NA 76.5 <2 <2 <2 <6 <2
07/20/99 11.84 <500 NA 104 <2 <2 <2 <6 <2
10/13/99 11.91 <500 NA 149 <2 <2 <2 <6 <2
05/24/00 12.49 <500 NA 85.3 3.3 <2 <2 <6 <2
08/09/00 12.36 <500 NA 128 <2 <2 <2 <6 <2
11/07/00 12.82 <500 NA 134 <2 <2 <2 <6 <2
02/08/01 14.67 <500 NA 110 <2 <2 <2 <6 <2
05/08/01 12.80 <500 NA 124 <2 <2 <2 <6 <2
08/14/01 12.10 <500 NA 131 <2 <2 <2 <6 <2
08/09/02 16.75 <500 <500 13.6 <2 <2 <2 <6 <2
11/14/02 16.70 <500 <500 8.6 <2 <2 <2 <6 <2
02/19/03 18.45 <500 <500 5.7 <2 <2 <2 <6 <2
11/12/09 14.36
06/29/10 9.61 4,770 1,930 30.2 619 28.9 137 788 97.4
02/14/13 NM NA NA NA NA NA NA NA NA
09/10/13 16.09 4,660 <1,000 <5 <5 <5 43 215 50
11/18/13 16.53 1,000 <1,000 <5 <5 <5 17 68 13
07/22/14 17.82 1,500 <1,000 <1 2 <1 34 126 16
05/13/15 14.68 1,870 <1,000 <1 24 <1 15 66 15
05/03/16 13.42 16,800 24,300 <5 60 <5 72 333 103
11/18/16 15.52 7,310 5,600 <3 68 <8 31 98 16
06/06/18 17.81 2,940 1,600 <5 28 <12 14 50 <12
04/17/19 9.95 6,560 2,200 <5 193 <12 31 87 20
10/09/19 14.05 13,800 13,900 <5 62 <12 32 86 21
06/25/20 14.57 2,180 1,500 <5 53 <12 14 28 <12
01/27/22 17.99 3,420 1,300 <5 33 <12 <12 14 <12
04/21/22 17.68 1,740 <1,000 <5 50 <12 <12 13 <12
07/28/22 18.45 3,220 1,600 <5 40 <12 14 24 <12
10/20/22 18.00 2,010 1,000 <5 23 <12 <12 <12 <12
09/27/23 12.96 4,780 1,300 <5 133 <12 23 49 <12
12/12/23 13.19
2,230 <1,000 <5 39 <12 <12 17 <12
03/20/24 8.70
2,450 1,200 <5 41 <12 30 65 19
MW-7
LNAPL
Page 3 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
05/24/00 12.99 600 NA <5 135 <5 <5 <15 <5
08/09/00 12.64 1,700 NA <5 21.9 <5 <5 <15 <5
11/07/00 12.30 1,900 NA <5 7.2 <5 <5 <15 <5
02/08/01 14.20 2,700 NA <2 95.9 <2 <2 <6 <2
05/08/01 12.70 3,100 NA <2 74.0 <2 <2 15.9 4.7
08/14/01 11.98 3,200 NA <2 45.2 <2 <2 <6 <2
08/08/02 17.04 1,000 640 <5 12.0 <5 <5 <15 <5
11/13/02 18.10 600 <500 <2 112 <2 <2 <6 <2
02/19/03 19.42 6,400 4,300 <2 104 9.5 <2 10.3 3.3
05/28/03 19.21 980 <500 <2 60 3.3 <2 <6 <2
03/24/04 18.93 16,900 E 2,170 <10 106 14 19 27 44
10/10/06 10.95 1,210 <2,000 <1 9 <1 <1 <3 16
05/09/07 13.92 <50 <2,000 <1 14 <1 <1 <3 <1
11/12/09 13.96 14,000 3,900 <2 76 <2 2.6 3.5 <2
06/29/10 9.43 5,450 8,150 <2 75.2 <2 6.81 12.5 7.19
02/14/13 16.58 6,330 <1000 <1 3 <1 <1 <3 <2
09/10/13 17.57 2,260 <1,000 <1 2 <1 <1 <3 <2
11/19/13 17.67 2,830 <1,000 <1 4 <1 <1 <3 <2
07/22/14 18.95 1,700 <1,000 <1 5 <1 <1 <3 7
05/14/15 15.01 2,170 1,100 <1 24 <1 2 10 4
05/04/16 13.29 1,450 <1,000 <5 21 <5 <5 10 <5
11/18/16 15.26 2,020 <1000 <2 10 <5 <5 <5 <5
06/06/18 18.62 11,300 1,800 <5 <5 <12 <12 <12 <12
04/17/19 10.33 6,580 1,500 <5 71 <12 18 54 15
10/09/19 14.66 3,820 2,300 <5 22 <12 <12 <12 <12
06/25/20 15.38 2,810 2,400 <5 34 <12 <12 <12 <12
01/27/22 19.21 3,080 <1,000 <5 <5 <12 <12 <12 <12
04/21/22 19.16 1,900 <1,000 <5 <5 <12 <12 <12 <12
07/28/22 20.44 798 <1,000 <5 6 <12 <12 <12 <12
10/20/22 19.38 2,170 <1,000 <5 26 <12 <12 <12 <12
09/27/23 13.75 2,000 1,100 <5 29 <12 <12 <12 <12
12/12/23 14.95
1,420 1,400 <5 33 <12 <12 <12 <12
03/20/24 11.65
437 <1,000 <5 <5 <12 <12 <12 <12
05/30/03 19.61 63,000 5,400 <100 11,000 E 5,500 E 1,700 9,100 340
03/25/04 19.22 46,000 7,910 <100 10,700 E 1,670 1,110 5,440 201
10/09/06 12.41 16,700 <2,000 <1 7,700 966 1,630 5,000 303
05/04/16 14.34 6,960 1,300 <5 878 58 269 590 58
11/18/16 15.98 7,090 1,600 <20 2,150 103 474 1,170 66
06/06/18 19.39 2,530 1,400 <5 446 23 126 361 16
04/17/19 10.63 396 <1,000 <5 94 <12 23 17 <12
10/09/19 15.33 1,730 <1,000 <5 474 14 103 121 16
06/25/20 16.12 1,300 <1,000 <5 323 13 66 162 <12
01/27/22 19.66 5,510 1,100 <5 1,740 19 374 663 37
04/21/22 19.51 5,070 <1,000 <5 2,490 21 368 422 32
07/28/22 20.76 8,740 1,400 <5 4,340 27 354 446 41
10/20/22 19.77 8,520 1,200 <5 4,700 38 364 404 37
09/27/23 14.40 4,820 1,100 <5 3,400 <12 99 123 25
12/12/23 15.59
2,870 <1,000 <5 2,110 21 116 92 23
03/20/24 12.89
4,150 <1,000 <5 2,970 22 121 139 27
05/30/03 20.06 82,000 E 5,700 <100 21,000 E 7,400 E 730 8,200 280
10/09/06 12.38 65,100 <2,000 <5 11,200 1,570 1,520 8,780 485
05/08/07 14.52
11/12/09 15.06 41,000 10,000 <40 4,700 1,100 1,100 5,000 360
06/29/10 10.62
02/14/13 17.59 32,000 3,800 <50 8,290 271 668 3,550 227
09/10/13 15.16 20,200 2,400 <25 4,880 170 580 3,120 208
11/19/13 18.56 23,300 2,600 <10 8,140 211 814 4,000 227
07/22/14 19.76 14,100 1,800 <10 4,100 99 576 2,660 178
05/14/15 16.10 12,300 2,300 <1 2,680 51 364 2,260 137
05/03/16 14.55 19,700 4,900 <5 1,760 26 280 1,370 156
11/18/16 16.42 7,500 2,300 <100 3,580 <250 <250 900 <250
06/06/18 19.64 8,830 4,400 <5 1,700 <12 125 504 54
04/17/19 11.05 901 <1,000 <5 41 <12 <12 34 <12
10/09/19 15.73 3,110 1,700 <5 578 <12 54 143 20
06/25/20 16.43 <2,500 3,800 <100 1,910 <250 <250 350 <250
01/27/22 20.01 13,100 2,200 <5 6,690 15 178 580 57
04/21/22 19.85 14,600 2,800 <5 8,320 20 202 644 63
07/28/22 21.07 17,000 4,000 <5 10,300 17 166 577 72
10/20/22 20.12 19,900 4,100 <5 10,500 28 225 759 92
09/27/23 14.80 15,200 2,700 <5 9,330 17 167 309 34
12/12/23 15.88
11,600 2,900 <5 8,990 24 199 421 59
03/20/24 12.71
18,400 2,400 <5 14,300 28 291 617 81
MW-14
MW-15
MW-16
LNAPL
LNAPL
Page 4 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
05/28/03 20.28 19,000 E 1,900 <20 4,300 E 2,200 E 210 1,500 41
03/24/04 19.77 29,700 E 7,310 <10 4,810 E 2,360 E 238 3,960 E 242
10/09/06 12.31 17,900 <2,000 <1 4,520 196 430 2,000 139
05/08/07 15.42 8,670 <2,000 3 4,670 116 307 1,330 133
11/12/09 15.63 18,000 1,900 6.3 9,100 140 690 2,000 210
06/29/10 11.12 15,700 5,820 3.75 6,120 126 1,430 4,700 272
02/14/13 17.79 19,100 <1000 <20 8,880 32 423 872 121
09/10/13 18.60 12,300 <1,000 <25 6,710 28 318 571 97
11/19/13 18.72 32,800 1,900 <5 16,600 47 737 1,560 186
07/22/14 19.93 18,000 1,200 <10 9,960 27 480 944 95
05/13/15 15.30 19,700 <1,000 2 10,800 24 511 938 158
05/04/16 14.71 20,300 2,600 <5 10,000 20 415 1,200 206
11/18/16 16.87 21,000 3,100 <50 12,700 <50 730 1,220 182
06/06/18 19.84 14,400 3,900 <5 5,620 24 505 676 123
04/17/19 11.34 20,600 8,300 <40 1,930 <100 1,600 4,400 423
10/09/19 16.08 21,200 5,400 <5 10,000 18 915 1,680 266
06/25/20 18.73 21,900 5,100 <50 11,900 <125 924 1,660 194
01/27/22 19.90 20,000 2,100 <5 13,800 25 544 804 135
04/21/22 19.75 19,700 2,500 <5 13,000 28 592 872 144
07/28/22 20.92 30,000 3,000 <5 20,600 33 640 848 165
10/20/22 20.04 21,300 3,100 <5 14,500 33 542 744 134
09/27/23 14.84 24,200 5,800 <5 8,850 27 1,040 2,390 170
12/12/23 15.82
25,300 5,400 <5 15,100 34 1,080 1,590 284
03/20/24 12.13
18,800 3,800 <5 10,500 20 764 1,160 223
05/28/03 18.49 23,000 E 2,100 <20 8,400 E 1,100 E 27 1,000 47
03/24/04 17.96 16,600 E 6,090 <10 5,410 E 545 E 94 671 120
10/09/06 10.56 5,780 <2,000 <1 243 52.7 127 893 182
05/08/07 14.09 5,270 <2,000 <1 3,270 351 323 379 107
11/12/09 14.04 2,500 720 <2 970 17.0 94 230 55
06/29/10 9.36 477 670 <2 410 <2 7.08 4.89 3.16
02/14/13 15.97 3,640 1,200 <10 834 102 393 744 164
09/10/13 16.75 4,180 1,400 <5 525 116 272 443 34
11/19/13 16.89 3,080 <1,000 <5 378 56 247 510 25
07/22/14 18.06 1,760 <1,000 <10 240 50 183 680 36
05/14/15 14.49 2,170 1,000 <1 175 33 88 276 17
05/04/16 12.95 404 <1,000 <5 12 <5 13 18 6
11/18/16 15.17 2,930 <1,000 <10 258 <25 206 168 <25
06/06/18 18.01 3,310 1,200 <5 306 35 230 381 33
04/17/19 9.19 <125 <1,000 <5 5 <12 <12 <12 <12
10/09/19 14.24 1,270 <1,000 <5 812 <12 <12 <12 16
06/25/20 14.89 <1,125 <1,000 <50 1,100 <125 <125 <125 <125
01/27/22 18.29 965 <1,100 <5 460 <12 74 42 <12
04/21/22 18.09 959 <1,000 <5 412 13 113 162 24
07/28/22 19.21 588 <1,000 <5 349 <12 44 17 <12
10/20/22 18.35 <125 <1,000 <5 115 <12 <12 <12 <12
09/27/23 13.19 <125 2,100 <5 46 <12 <12 <12 <12
12/12/23 14.14
982 2,300 <5 982 <12 <12 <12 <12
03/20/24 9.41
<125 2,000 <5 <5 <12 <12 <12 15
MW-18
MW-17
Page 5 of 6 Terracon Consultants
Table 2
Brent Redd Property
148 East Center Street, Monticello, UT
(Facility ID 5000003, Release Site GZQ)
Groundwater Analytical Results (mg/L)
Sample
Location Sample Date
Depth to
Water
(ft-btoc)
TPH-GRO TPH-DRO MTBE Benzene Toluene
Ethyl-
benzene
Total
Xylene
Naph-
thalene
1,000 1,000 200 5 1,000 700 10,000 700
10,000 10,000 200 300 3,000 4,000 10,000 700
Initial Screening Levels (ug/L)
TIER 1 Screening Criteria (ug/L)
01/27/22 19.09 687 <1,000 <5 25 <12 21 43 14
04/21/22 18.89 <125 <1,000 <5 10 <12 <12 15 <12
07/28/22 20.08 <125 <1,000 <5 8 <12 <12 <12 <12
10/20/22 19.25 <125 <1,000 <5 8 <12 <12 <12 <12
09/27/23 14.12 <125 <1,000 <5 5 <12 <12 <12 <12
12/12/23 15.05
<10 <1,000 <4 0.5 <1 <1 <1 <1
03/20/24 10.97
<125 <1,000 <5 <5 <12 <12 <12 <12
01/27/22 17.27 <125 <1,000 <5 9 <12 <12 <12 <12
04/21/22 16.94 <125 <1,000 <5 9 <12 <12 <12 <12
07/28/22 17.65 <125 <1,000 <5 7 <12 <12 <12 <12
10/20/22 17.28 <125 <1,000 <5 <5 <12 <12 <12 <12
09/27/23 12.22 <125 <1,000 <5 18 <12 <12 <12 <12
12/12/23 12.69
<12 <1,000 <5 11 <12 <12 <12 <12
03/20/24 8.61
<125 <1,000 <5 <5 <12 <12 <12 <12
01/27/22 18.72 <125 <1,000 <5 <5 <12 <12 <12 <12
04/21/22 18.20 <125 <1,000 <5 <5 <12 <12 <12 <12
07/28/22 18.50 <125 <1,000 <5 <5 <12 <12 <12 <12
10/20/22 18.49 <125 <1,000 <5 <5 <12 <12 <12 <12
09/27/23 12.87 <125 <1,000 <5 <5 <12 <12 <12 <12
12/12/23 12.46 <125 <1,000 <5 <5 <12 <12 <12 <12
03/20/24 7.15 <125 <1,000 <5 <5 <12 <12 <12 <12
NOTES:
LNAPL = Light Nonaqueous Phase Liquid
Bold type indicates concentration exceeds laboratory reporting limit.
<Not detected at laboratory reporting limit.
Concentration exceeds Initial Screening Level (ISL)
concentration exceeds Tier 1 Screening Level (Tier 1 SL)
MW-19
MW-20
MW-21
Page 6 of 6 Terracon Consultants
Appendix C
Chain of Custody and Laboratory Data Sheets
The analyses presented on this report were performed in accordance with the
National Environmental Laboratory Accreditation Program (NELAP) unless
noted in the comments, flags, or case narrative. If the report is to be used for
regulatory compliance, it should be presented in its entirety, and not be
altered.
Client Service Contact: 801.262.7299
Terracon IHI
Attn: Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
Work Order: 24C1584
Project: DERR Brent Redd LUST, Monticello
3/28/2024
Approved By:
Mark Broadhead, Project Manager
9632 South 500 West Sandy, Utah 84070
Serving the Intermountain West since 1953
801.262.7299 Main 866.792.0093 Fax www.ChemtechFord.com
Page 1 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: B-3R
Lab ID: 24C1584-01Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 8:15
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.050 EPA 8260D/5030B4.09Benzene
mg/L 3/22/243/22/240.125 EPA 8260D/5030B1.17Ethylbenzene
mg/L 3/22/243/22/240.050 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.125 EPA 8260D/5030B0.398Naphthalene
mg/L 3/22/243/22/240.125 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.125 EPA 8260D/5030B4.95Xylenes, total
Gasoline Range
mg/L 3/22/243/22/241.25 EPA 8260B/C /5030A/[CALC]27.7Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 C8.3Diesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 2 of 16Page 2 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-14
Lab ID: 24C1584-02Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 9:00
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]0.437Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 3 of 16Page 3 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-15
Lab ID: 24C1584-03Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 10:21
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.100 EPA 8260D/5030B2.97Benzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.121Ethylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.027Naphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.022Toluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.139Xylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]4.15Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 4 of 16Page 4 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-16
Lab ID: 24C1584-04Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 10:44
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.250 EPA 8260D/5030B14.3Benzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.291Ethylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.081Naphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.028Toluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.617Xylenes, total
Gasoline Range
mg/L 3/22/243/22/240.250 EPA 8260B/C /5030A/[CALC]18.4Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 C2.4Diesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 5 of 16Page 5 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-17
Lab ID: 24C1584-05Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 11:20
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.250 EPA 8260D/5030B10.5Benzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.764Ethylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.223Naphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.020Toluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B1.16Xylenes, total
Gasoline Range
mg/L 3/22/243/22/240.250 EPA 8260B/C /5030A/[CALC]18.8Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 C3.8Diesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 6 of 16Page 6 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-18
Lab ID: 24C1584-06Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 12:13
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/25/243/25/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/25/243/25/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/25/243/25/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L MS-Low3/25/243/25/240.012 EPA 8260D/5030B0.015Naphthalene
mg/L 3/25/243/25/240.012 EPA 8260D/5030BNDToluene
mg/L 3/25/243/25/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/25/243/25/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 C2.0Diesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 7 of 16Page 7 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-19
Lab ID: 24C1584-07Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 13:03
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 8 of 16Page 8 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-5R
Lab ID: 24C1584-08Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 14:02
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030B0.340Benzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.079Ethylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.012Naphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.096Xylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]0.969Gasoline Range Organics
Diesel Range
mg/L 3/27/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 9 of 16Page 9 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-7
Lab ID: 24C1584-09Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 15:21
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030B0.041Benzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.030Ethylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.019Naphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030B0.065Xylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]2.45Gasoline Range Organics
Diesel Range
mg/L 3/28/243/27/241.0 EPA 8015 C1.2Diesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 10 of 16Page 10 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-20
Lab ID: 24C1584-10Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 16:05
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 3/28/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
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xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: MW-21
Lab ID: 24C1584-11Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 16:43
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Diesel Range
mg/L 3/28/243/27/241.0 EPA 8015 CNDDiesel Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 12 of 16Page 12 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: Field Blank
Lab ID: 24C1584-12Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 17:00
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 13 of 16Page 13 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Sample ID: Trip Blank
Lab ID: 24C1584-13Matrix: Water
Flag(s)Units
Analysis
Date/Time
Date Sampled: 3/20/24 0:00
Preparation
Date/Time
Sampled By: Mark Lilly
Minimum
Reporting
Limit MethodResult
MBTEXn
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDBenzene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDEthylbenzene
mg/L 3/22/243/22/240.005 EPA 8260D/5030BNDMethyl tert-Butyl Ether (MTBE)
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDNaphthalene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDToluene
mg/L 3/22/243/22/240.012 EPA 8260D/5030BNDXylenes, total
Gasoline Range
mg/L 3/22/243/22/240.125 EPA 8260B/C /5030A/[CALC]NDGasoline Range Organics
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
Page 14 of 16Page 14 of 16
xx
Chemtech-Ford Laboratories
Serving the Intermountain West Since 1953
Certificate of Analysis
9632 South 500 West
Sandy, UT 84070
O:[phone] F: [phone]
www.ChemtechFord.com
Terracon IHI
Amy Austin
6949 South High Tech Drive
Midvale, UT 84047
PO#:
Receipt:
Date Reported:
Project Name:
#AL067003 / GZQ-57-TER, Task 1c
3/21/24 14:42 @ 2.5 °C
3/28/2024
DERR Brent Redd LUST, Monticello
Report Footnotes
Abbreviations
ND = Not detected at the corresponding Minimum Reporting Limit (MRL).
1 mg/L = one milligram per liter or 1 mg/kg = one milligram per kilogram = 1 part per million.
1 ug/L = one microgram per liter or 1 ug/kg = one microgram per kilogram = 1 part per billion.
1 ng/L = one nanogram per liter or 1 ng/kg = one nanogram per kilogram = 1 part per trillion.
On calculated parameters, there may be a slight difference between summing the rounded values shown on the report
vs the unrounded values used in the calculation.
Flag Descriptions
MS-Low = Estimated low due to Matrix Spike recovery.
Project Name: DERR Brent Redd LUST, Monticello CtF WO#: 24C1584
www.ChemtechFord.com
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