DERR-2025-002737

Tetra Tech
4750 West 2100 South, 4th Floor, Salt Lake City, UT 84120
ww.tetratech.com
April 15, 2025
Mark E. Crim, P.G.
Environmental Scientist
Utah Department of Environmental Quality
Division of Environmental Response and Remediation
195 North 1950 West
Salt Lake City, Utah 84114-4840

Subject : Corrective Action Plan Update
Maverik #319, Price, Utah
Facility ID 5000038, Release Site MTQ
Dear Mr. Crim:
On behalf of Maverik, Tetra Tech, Inc. (Tetra Tech) has prepared this Corrective Action Plan (CAP)
update for t he Maverik Store #319, located at 891 East Main Street, Price, Utah, as shown on Figure 1.
In 2011, a release was detected at the site based on the presence of free-phase gasoline in some
monitor wells installed at the site from a previous release. Maverik identified the source of the release
to be a loose siphon check valve at the submersible pump for the unleaded gasoline tank. The leak was
immediately repaired. Gasoline detected in monitoring wells, adjacent and down-gradient from where
the leak originated, prompted Maverik to initiate emergency abatement actions to prevent further
migration of gasoline. Maverik prepared a CAP dated November 30, 2015, which was approved by the
Utah Division of Environmental Response and Remediation (DERR) in a letter dated February 4, 2016.
As part of that CAP, Maverik inten ded to perform source removal at the time of the planned store
closure. The store is slated to close in May 2025, and the underground storage tanks (USTs) will be
removed by Direct Push Services (DPS). Additionally, the store closure will involve demolition of the
store, which will provide access to the impacted soil beneath the building and surrounding
infrastructure. The building demolition is scheduled to occur at the same time as the USTs' removal.
Figure 2 illustrates the existing site layout, which includes the building, USTs, and canopy and
dispenser area. Also presented on Figure 2 are the locations and depths at which soil samples were
collected in 2013 that exceeded the Utah Risk-Based Corrective Action (RBCA) Tier 1 Screening
Levels, all of which were below a depth of sixteen feet. The excavator that DPS plans to use has the
capability to dig to a depth of twenty-two feet. The actual depths that the excavator can reach will
depend on the stability of the excavation sidewalls. Shown on Figure 2 are the proposed limits of
excavation based on existing soil data collected in 2013.

TETRA TECH
Scope of Work
Concurrent with the USTs removal and demolition of the building, DPS will be retained to remove
additional soil to the extent practical or to the limits of impacts caused by the release identifier MTQ.
Based on previously collected soil sample results, it is anticipated that impacts will be encountered
under the building area and to the south. Figure 2 shows the proposed limits of excavation based on
these data. The depth of impact is expected to extend to groundwater at approximately 18 feet or more.
Most of soil within the excavation limits is likely to be clean overburden and can be reused to backfill
the excavation and to regrade the area after the excavation is complete. There will be areas where fill
will be needed after removal of the building foundation and canopy footings. In discussion with DPS, it
is expected that through benching and careful management, the excavation can extend to groundwater,
and removal of the smear zone can be accomplished. The actual removal depth will be determined in
the field and depend on the excavation stability.
Assuming the excavation reaches groundwater, Maverik will place Klozur ® persulfate , manufactured by
PeroxyChem, into the bottom of the excavation to initiate in situ chemical oxidation (ISCO). Klozur ®
persulfate is a suite of products that contain sodium persulfate. The introduction of an oxidant into the
subsurface is designed to oxidize petroleum residuals in soil and groundwater. The specific compound
and amount of Klozur® persulfate to be applied is currently being evaluated with Evonik, the U.S.
distributor of the product. The product will be placed at the bottom of the excavation and mixed with soil
using the excavator bucket. Application procedures for the product are presented in Attachment 1.
Tetra Tech will provide a Utah -certified Soil and Groundwater sampler for field screening and soil
sample collection. Tetra Tech will collect soil samples for field inspection for petroleum staining and
screening for volatile organic compounds (VOCs) using a photoionization detector (PID). This will help
guide the excavator operator on where the excavation should proceed.
Petroleum -impacted soil will be loaded directly into trucks for transportation and disposal at an
appropriate landfill facility based on existing analytical results. It is expected that the soil can be
disposed of at the Republic Services, LLC, ECDC environmental landfill in East Carbon, Utah.
Confirmation soil samples will be collected around the excavation perimeter, sidewalls, and floor of the
excavation. It is proposed that samples be collected from the sidewalls at a depth where the most
impacted zone is encountered and collected every 50 linear feet of sidewall around the excavation. The
excavation floor is expected to be below the groundwater elevation , floor samples will be collected if
feasible. Samples will be collected in laboratory-supplied containers and analyzed by a Utah -certified
laboratory for benzene, ethylbenzene, toluene, total xylenes, and naphthalene (BTEXN) and total
petroleum hydrocarbons as gasoline (TPH-GRO) using EPA Method 8260d .
Public Notification
Prior to implementing the corrective action, the potentially affected public will be notified of the
corrective action plans and timing in accordance with UAC R315-124. Public notification is required to
reach the segment of the public that may be directly affected by the release or the corrective action
process. Public notice will be conducted by direct notification to adjoining property owners that could be
affected. If significant concerns are raised by affected individuals and/or businesses, a public meeting
may be necessary and will be coordinated with the DERR.
A copy of the proposed public notice is included in Attachment 2 . The public notice includes all
requirements outlined in the Public Notice Template published by DERR in the DERR Corrective Action
Guide.

TETRA TECH
Permitting and Notification
Implementation of this CAP will require correspondence and potential permitting through the following
agencies. This list is not all-inclusive, and all applicable local, state, or federal rules, codes, or laws will
be followed by Maverik and Tetra Tech . Documentation of notifications, permits, or approvals obtained
from other agencies will be submitted to the DERR project manager.
Carbon County Health Department
The Carbon County Health Department will be notified at least 72 hours before the commencement of
field work related to the corrective action.
Blue Stakes
Blue Stakes of Utah will be notified before the commencement of excavation activities related to the
corrective action for utility clearances.
Completion Report
On behalf of Maverik, Tetra Tech will prepare and submit a Corrective Action Completion Report to DERR
for review and approval once corrective action activities are completed. The report will document the
following:
• Narrative of the work performed, including deviations from this CAP, if any, as approved during
the work by the DERR.
• As-built drawings to show the final limits of excavation.
• Total weight of soil disposed of at the ECDC landfill.
• A table summarizing all loads removed from the Site for disposal. The table will include the date
of each load, the manifest number, and the weight on the disposal ticket. Copies of all the
manifests will be included as an appendix.
• Table summarizing the confirmation soil sample results compared to the Utah Initial Screening
Levels (ISLs) and the Utah Risk Based Corrective Action (RBCA) Tier 1 screening criteria.
• Summary of use and application of Klozur ® persulfate.
• Scaled maps showing all environmental sample locations.
• Soil boring logs and/or well construction details.
• Copies of applicable sample collection data forms and laboratory analytical reports.
• Conclusions and recommendations for further evaluation for Site closure.
The Corrective Action Completion Report will provide a comprehensive summary of the corrective action
process, supporting closure for Release MTQ.
Groundwater Monitoring
Groundwater samples collected in 2024 were collected from monitor wells (MW) MW-1a, MW-3a, MW-
7a, MW-8, MW-9, MW-11, MW-12, MW-13, MW -14, and MW-16 as shown on Figure 2. It is anticipated
that some wells will be destroyed during the UST removal and subsequent soil excavation. Wells that
can be protected will be maintained for future use. Strategic replacement wells will be installed, after
backfilling the excavation, if required following a review of confirmatory soil analytical data, the most
TETRA TECH
recent groundwater analytical data, and an evaluation of the RCBA Tier 1 Criteria. The frequency of
sampling is proposed to be within three months of post-excavation, followed by quarterly sampling for
the first year, and then an evaluation of Site Closure can be performed.
If you have questions about this report or would like additional information, please contact us.
Respectfully Submitted,
Tetra Tech, Inc.

Curt Stripeika David S. Wilson, P.E., P.G.
Utah Certified Environmental Consultant CC0003 Principal Engineer
[e-mail] [e-mail]

TETRA TECH

FIGURES

L a s V e g a s
U t a h
S a l t L a k e C i t y
Project Location:
Carbon County, Utah
Date: 4/2/2025
Maverik #319
891 East Main Street
Price, Utah
Maverik, Inc
Figure 1: Project Location
0 0.50.25
Miles
Legend
Project Area
6
E
M
a
in

S
t
E

M
a
in

S
t
E

M
a
in

S
t
MW-9
MW-14
MW-11
Date: 4/4/2025
Maverik #319, 891 East Main Street
Price, Utah
Maverik, Inc
Figure 2: Proposed Limits of
Excavation
0 10050
Feet
Legend
Monitoring Wells (Soil analytical data from
2015 Subsurface Investigation Report)
Property Line
Proposed limits of Excavation
MW-3a
@16' Benzene -
27.3 mg/kg
@18' Benzene -
10.9 mg/kg
MW-1
@16' Benzene -
11.6 mg/kg
MW-7a
@19' Benzene -
9.23 mg/kg
MW-8
@21' Benzene -
3.57 mg/kgMW-12
@19' Benzene -
2.97 mg/kg
MW-13
@20' Benzene -
2.62 mg/kg
mg/kg = milligrams/kilograms
Wells with no data shown had soil analytical results below the Utah Initial Screening Levels (ISLs).
TETRA TECH

ATTACHMENT 1
KLOZUR APLICATION GUIDE

Product Application Guide

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Klozur® Persulfate Soil Mixing
Recommendations and Application Guidelines
Klozur® persulfate is a high purity environmental grade product used as an in situ chemical oxidation (ISCO)
technology to treat a wide variety of contaminants of concern in soil and groundwater around the world. Klozur
persulfate can be activated using PeroxyChem’s patented technologies1 to form the powerful oxidative and reductive
radicals that aggressively treat targeted contaminants. This technology is well established having been successfully
applied in thousands of field applications and scientifically validated in hundreds of independent peer-reviewed journal
articles and conference presentations.
The Klozur persulfate portfolio includes several high purity products:
• Klozur SP is based on sodium persulfate which is highly soluble and has been used for over a decade to
treat contaminated source areas.
• Klozur One is a blend of Klozur SP with carefully crafted activator technologies combined into a single all-in-
one product. Klozur One makes applying Klozur SP more convenient than ever before.
• Klozur KP is based on potassium persulfate which has over an order of magnitude lower solubility than
Klozur SP. This allows it to serve as an extended release oxidant to treat low permeable soils and in
permeable reactive barriers.
• Klozur CR provides a combined remedy of chemical oxidation and bioremediation. The product is a blend of
Klozur SP and PermeOx® Ultra, typically used to treat low to moderately contaminated site source zones,
plumes, and in excavation backfill applications.
Klozur products are typically applied using an injection, soil mixing or backfill strategies to establish contact between
Klozur SP and the contaminants of concern. This document discusses the soil mixing strategies for applying Klozur
products.
Soil Mixing
A soil mixing strategy typically involves the mechanical agitation of
subsurface soils blending in both Klozur persulfate and the necessary
activator reagents. The mechanical agitation breaks apart the natural soil
structure and helps to establish contact between activated Klozur persulfate
and the contamination found in the soils. This contact is key for successful
remediation. A soil mixing application strategy can be particularly useful in
treating source zones and lower permeable soils such as silts or clays.

Soil mixing has been used to target:
• Source areas as the primary method of treatment
• Residual contamination after excavation as a secondary method of treatment
• Combined with in situ stabilization (ISS) and other technologies
• To blend in reagents to form a permeable reactive barrier
ISCO works by
establishing contact
between sufficient mass
of activated persulfate
with the mass of
contamination

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Key Advantages of Soil Mixing
• Very effective in establishing contact between the activated persulfate and contaminant on soils
• Can be used to breakup low permeability materials allowing better contact minimizing the impact of site soil
heterogeneity.
• Helps establish contact of reagents with zones of high concentration including non-aqueous phase liquids
(NAPLs)
• Rapid process that is well suited for source zones
• Amendments can be added to increase soil strength and decrease contaminant flux from soils
In situ soil mixing of activated Klozur persulfate can be combined with a second remedial technology: in situ
stabilization (ISS). The combination of ISCO and ISS occurs when Portland cement, bentonite, or other solidification
compounds are blended in with the activated persulfate. The benefit of combining both technologies into a single
application is that ISCO can be used to reduce the contaminant mass while ISS can be used to reduce the potential
contaminant mass flux coming from the blended area. In addition, ISS using Portland cement can increase soil
strength following a soil mixing application, providing surface support.
Methods of Soil Mixing
There are several different methods that can be used to mix the Klozur persulfate with soil to establish contact with
the contamination.
Excavation Buckets
The buckets on backhoes and excavators can be used to mix the
reagents with the soils. This method typically has a low mobilization
costs, but tends to be less efficient, have a limited depth range, and
reagents tend to be applied at the surface and blended down into the
target depth interval. Because of these limitations, excavation bucket
mixing is typically used for smaller and shallow sites.

Excavator Mounted Drum Mixers
Excavator mounted drum mixers have become more advanced and
their use more commonplace. These drum mixers typically have a
method to inject liquid or slurried reagents from the drum allowing for
the placement of the reagents at depth and have teeth that rotate on
a drum to mix the reagents with the soil. Many drum mixers allow the
drum itself to rotate creating multiple axis of rotation. Drum mixers
can have lower mobilization costs since they are typically on arms that
can be mounted on excavators. The functional depth of drum mixers
Courtesy of CH2M
Courtesy of ISOTEC

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without benching or terracing of the soils is limited to reach of the excavator arm (typical: 15 to 25 ft; 4.5 to 7.5 m).
These mixers tend to be efficient, mixing between 200 to 600 tons of soil per day.

Rotary Augers
Rotary augers are circular devices mounted to various rigs or cranes. The
augers rotate mixing in the reagents and soils. Some rotary augers allow
injection of liquid or slurried reagents at depth typically through injection
ports in the rotary blades. Mobilization costs of rotary augers typically
increase with the size and depth of which the auger is capable of treating.
However, rotary augers can be used to soil mix at depths well below the
other soil mixing methods and tend to be used for soil mixing projects
where the tool needs to reach deeper than 25 to 30 ft. bgs (8 to 9 m bgs).
Screening
Dry reagents can be blended with excavated soils above ground and
reapplied to the excavation area.
Soil mixing is usually accomplished by dividing a site area into cells. These
cells will vary in size as needed, but are typically squares with sides of 10
to 15 feet (3 to 4.5 meters). If augers are to be used, the cell is typically
defined by the auger diameter. If liquid or slurry reagents and tooling allow
injection at depth, vertical intervals are also established with different mass
of reagents being applied as required to each vertical interval. Another
common approach is to mix the entire vertical target interval sufficiently
assuming an average distribution of both the contaminant and reagent.
This method allows the treatment of the entire vertical interval with a single
approach and reagents can be added at the surface and blended down.
Soil m ixing has been conducted in both saturated and unsaturated
(vadose) zones. However, vadose zone applications may require the addition of water depending on the bound
moisture content of the soil. If excess water is applied then additional time may be required for the soil to drain.
Please see “Lessons Learned” section of this document for a discussion regarding post application drainage.
Persulfate Activation
Activated persulfate can generate powerful radicals capable of treating most contaminants of concern. Common
activation methods include alkaline or high pH, iron-chelate, di-valent iron, zero valent iron, heat, and hydrogen
peroxide. While all of PeroxyChem’s recommended activation methods can be used with an in situ mixing application
strategy, materials compatibility with in situ mixing projects is often an important consideration, since mixing
equipment typically has components that contain carbon steel, which is reactive with Klozur persulfate at neutral and
acidic pH values.
Alkaline activated persulfate is the most common activation method used for in situ soil mixing projects because
carbon steel has a significantly lower rate of corrosion under alkaline conditions. Any equipment contacting reagents
Courtesy of GeoSolutions

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needs to be chemically compatible with those reagents. Please consult PeroxyChem’s Corrosion and Materials
Compatibility with Klozur Persulfate guide for more information.
Combining ISCO with ISS
In situ soil mixing of activated Klozur persulfate can be combined with in situ stabilization (ISS) to reduce the
contaminant mass, enhance the soil characteristics post soil mixing, and to minimize the contaminant mass flux from
the treated area. The combination of ISCO and ISS occurs when Portland cement, bentonite, or other solidification
compounds are blended in with the activated Klozur persulfate. The amount and type of solidification agent can be
varied depending upon the desired soil characteristics.
Solidification Agents
Several different compounds can be used to help with soil structure following a soil mixing project by partially or
completely solidify the soils. These compounds include:
• Portland Cement • Blast Furnace Slag
• Calcium hydroxide (Ca(OH)2);
hydrated, slaked, or caustic lime)
• Cement Kiln Dust
• Lime Kiln Dust
• Calcium Oxide (CaO; quicklime) • Other pozzolans
• Fly Ash (Class C & F) • Bentonite
Always consider the purity and impurities of the above substances to make sure they are appropriate for your site
specific needs.
Key Design Considerations and Parameters
Design considerations are site specific. Among the most
critical design parameters are the loading rates of the different
reagents to be added. Loadings can vary both horizontally
from cell to cell or column to column or vertically if using a
mixing technology that allows placement of the reagents at
depth.
Common loading parameters include:
• Persulfate loading
• Activator loading
• Stabilization agent loading
Soil design loadings are typically reported as grams reagent
per Kg soil (g/Kg) or % reagent weight per soil weight (% w/w).
While it is common to specify an average loading for each area, it can be beneficial to also specify a minimum loading
and, if needed, a maximum loading. It is important to specify when using dry soil weight or wet soil weight. Dry soil
Courtesy of Cascade

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weights are commonly used in calculations and laboratory reported data since this methodology eliminates the
potential variability that a soil’s moisture content can introduce. However, some environmental professionals prefer
to specify reagent loading in terms of wet soil weight to aide in field monitoring.

Other typical key design parameters include:
• Cell or column size
• Vertical target interval
• Number of cells and columns
• Post application geotechnical soil characteristics such as
compressive strength and hydraulic conductivity
Bench Scale Tests
Bench scale tests for in situ soil mixing projects commonly evaluate several site specific parameters including:
• Base buffering capacity: Amount of alkali required to bring the site into alkaline range (if using alkaline
activated persulfate)
• Different loadings of Klozur persulfate, activator and stabilization agent
• Treatment efficacy of combined reagent blend
• Soil strength, hydraulic conductivity and other properties
• Decrease in leachability when combined with ISS
Monitoring
Monitoring programs are a critical aspect of applying any remedial
technology. It is important to understand and develop a list of key
questions and make sure the monitoring program is sufficient to
generate the data to answer those questions. The exact questions
will vary depending upon the site, but common questions for soil
mixing with activated persulfate include:
• What was the progress toward the interim or final remedial
goals?
• What was the contaminant mass reduction due to ISCO
(soil, groundwater and NAPL)?
• Were the Klozur persulfate and activator uniformly
blended?
• Were the desired reagent application rates achieved?
• What are the new groundwater flow patterns at the site?
• Are anaerobic oxidation or biogeochemical treatment occurring post ISCO?

Courtesy of Orin
Courtesy of Redox Tech

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For sites combining ISCO with ISS, or otherwise, using a solidification agent to help with geotechnical soil
characteristics, other common goals for a monitoring program include:
• What is the resulting compressive soil strength and hydraulic conductivity of post application soils?
• What is the immediate change in contaminant leachability?
• What is the long term change in contaminant leachability after exposure to multiple volumes of water?
The frequency and time intervals of sample points are site specific. Generally speaking, PeroxyChem recommends
waiting until more than 95 percent of the persulfate has been consumed or until persulfate concentrations have fallen
to less than 1 g/L before collecting soil samples. It is important to insure sufficient time for the contaminant to re-
equilibrate between soil and groundwater before monitoring groundwater. This equilibration process typically takes
between 1 to 3 months (post-application) for soil samples and 2 to 4 months (post-application) for groundwater
samples.
Case Studies
In situ soil mixing has been used as an application strategy for Klozur persulfate for the past decade. The following
is a sampling of available case studies.
In Situ Mixing
In situ mixing has been used to apply Klozur persulfate at a large number of
sites and as a result there are numerous case studies which have been
presented at conferences. Some of these case studies include:
• Fulkerson et al (2016) presented on a number of different soil mixing
applications including two lime activated Klozur SP projects.
• Perlmutter et al (2017) presented on a site where over 740,000 lbs of
Klozur SP and 260,000 lbs of hydrated lime that resulted in greater than
90 percent treatment of the contaminants of concern as measured 2 to
4 weeks post treatment.
• Morris et al (2012) used hydrated lime with Klozur SP to treat a complex
mixture of pesticides.
• Trichloroethene (TCE) was reduced by 96 to 99.9 percent in 18 of 21 sampling locations at another alkaline
activated Klozur persulfate site (Tarmann et al., 2012).
• Soils with up to 2,300 mg/Kg of mixed cVOCs were reduced to 1 mg/Kg at a site in New Jersey by soil mixing
with activated persulfate (Dyson and Palko, 2012).
ISS with ISCO
A combination of Portland cement, lime and 760,000 lbs of Klozur SP were applied at Turtle Bayou using auger mixers
and summarized in Wiley and Block (2010). The ratio of the cement was maintained so that the soil had structure but
was still sufficiently malleable to allow multiple applications. The application met its remedial goal of greater than 80
percent treatment. Combining ISS with activated persulfate was also discussed in Cassidy et al (2015) this research
showed treatment by activated persulfate, a reduction in contaminant leaching due to ISS, and then anaerobic
oxidation of petroleum hydrocarbons from a single application of Portland cement and Klozur SP.
Courtesy of Bill Lang

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Lessons Learned
As with any technology, there have been lessons learned during field applications. A few of lessons learned from in
situ soil mixing of activated persulfate are summarized below:
Dusting
Applying reagents in winds, from height or a combination can result in reagent dust. Mitigation measures for the
various possible field conditions should be considered. Common mitigation measures include having staff in proper
PPE, minimizing drop height of the reagents, misting, applying hydrated reagents, and avoiding exposing dry reagents
if winds are above a certain velocity.
Soil Expansion
Soils are typically not as compacted following a soil mixing application and high plasticity clays can expand. This can
result in excess soils that will no longer fit in the excavation area that is referred to as fluff. The excess materials are
either typically stockpiled to the side of or on top of the excavation area, or removed for disposal. Material stockpiled
on top of the excavation may partially or completely return to the excavation area as the mixed soils compress over
time. Site management during an application may include building of berms around the treatment area.
Drainage
Soil mixing in the vadose zone, especially if significant amounts of water are added, can result in mostly dry soils
becoming a soil slurry. These conditions may persist especially if drainage from the mixing area is limited. This issue
is most common when soil mixing low permeability vadose zone soils that can remain a slurry for an extended period
of time as the added water slowly moves out of the area.
Soil Strength
The resulting soil strength or compressive characteristics of soils following an in situ soil mixing project may not be
suited for subsequent site activities. These characteristics may make moving machinery or building upon the soil
following an in situ soil mixing project more challenging. This can be mitigated by increasing soil strength with the
addition of a solidification agents such as a calcium source (calcium hydroxide, etc.) to form gypsum with the residual
sulfate, Portland cement, or another bulking agent. Varying degrees of the solidification agents can be used to obtain
different soil characteristics.
Mitigation of ISCO by ISS
While ISS and ISCO have been successfully applied together, if the ISS solidifies the soils too quickly it could interfere
with the ISCO oxidation processes. This can occur if a significant concentration of Portland cement is added to the
mixture or if the mixture contains too little water and the Portland cement effectively dries the soils. The rate of
solidification and the percent treatment by ISCO can be evaluated on a bench scale test.
Health and Safety
Klozur persulfate has been applied safely and effectively at thousands of sites. However, as with any chemical,
proper procedures and equipment are recommended in its use. When working with Klozur persulfate, ensure to have
adequate ventilation and use the appropriate personal protective equipment, including safety glasses, suitable
protective clothing, boots (steel toed or equivalent), chemical resistant gloves, hard hat, and hearing protection (when
direct push is used). For dust, splash, mist, or spray exposures wear a filtering dust mask and chemical protective
goggles. A face shield can also be used in addition to goggles.

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Dust
When applying any solid reagent, dust could evolve. PeroxyChem recommends proper
consideration of this potential including personal protective equipment (PPE), and dust
mitigation measures.
Contaminant
Vapors
The mixing process can expose contaminated soils to the atmosphere and allow vapors to
escape potentially causing a health and safety hazard. Some mixing technologies have
developed hoods to help minimize this risk.

Please consult the appropriate safety data sheets (SDS) for guidelines regarding proper handling procedures. Klozur
persulfate SDS’s can be found at http://www.peroxychem.com/remediation. Additional safety equipment may be
required for mechanical and site operations.
Please contact PeroxyChem for additional guidance.

Notes
1. A limited use license is included with the purchase of Klozur Persulfate for PeroxyChem’s suite of national and
international patents for the in situ activation of persulfate to remediate environmental contaminants of concern including
US 6019548, US 6474908, US 7524141, US 7576254B2, US 7785038, and US 9375768B2.

References
Cassidy, D.P., Srivastava, V.J., Dombrowski, F.J., and Lingle, J.W., (2015) “Combining in situ chemical oxidation, stabilization, and anaerobic
bioremediation in a single application to reduce contaminant mass and leachability in soil,” J. of Hazardous Materials, 297, 347-355
Dyson, K.D., and Palko, P.J., (2012) “Chemically Activated Sodium Persulfate Soil Mixing Preceding Site Redevelopment Activities,” Eighth
International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA
Fulkerson, M., Sale, T., and Simpkin, T., (2016) “Ten Years of Soil Mixing: Technology Applications, Advancements, and Lessons Learned,” Tenth
International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Palm Springs, CA
Morris, K.A., Brown, R., Ross, D., and Butler, W.A., (2012) “ISCO Treatment of an Organochlorine Pesticide Source Area via Shallow Soil Mixing,”
Eighth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA
Perlmutter, M., Simpkin, T., Cassidy, D., and Smith B.A., (2017) “Soil Mixing and In situ Stabilization using Klozur® Persulfate: Theories, Benefits,
and Lessons Learned,” PeroxyChem Website, January 27, 2017
Tarmann, S., Kakarla, P., and Caldicott, W., (2012) “In-Situ Chemical Oxidation of Trichloroethylene in Clay Soil Using Rotating Dual Axis Blending
Technology,” Poster, Eighth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA
Wiley, J., Block, P., (2010) “Chemical Oxidation Using Sodium Persulfate at a Superfund Site in Texas,” Seventh International Conference on
Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA

Klozur and PermeOx are registered trademarks of PeroxyChem. © 2017 PeroxyChem. All rights reserved. Document 97-01-ESD-17 The
information contained herein is presented to the best of our knowledge, PeroxyChem makes no representations or warranties regarding the
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TETRA TECH
ATTACHMENT 2
PUBLIC NOTICE
Public Notice
PUBLIC COMMENT PERIOD
Date to Date, 2025
Corrective Action
Maverik #31 9
891 East Main Street, Price, Utah
Facility ID No. 5000038 and Release Site MTQ

A gasoline release has occurred at the Maverik #319 located at 891 East Main Street, Price,
Utah. Maverik has prepared a Corrective Action Plan (CAP), approved by the Division of
Environmental Response and Remediation (DERR), for the remediation of gasoline -
impacted soils.
Site Description and Background
The release of gasoline occurred in 2013. The environmental impacts associated with this
release required the development of a CAP to remediate.
Proposed Remediation Method
Soil excavation will be used to remove the gasoline-impacted soil. Work will involve
excavating an estimated volume of 250 to 750 cubic yards of contaminated soil for disposal
at the ET Technologies Soil Regeneration Site in Salt Lake County, Utah.
Schedule
Excavation is planned to begin on _______ (date) and is expected to take approximately
________ weeks.
If you have any comments, please contact:
Mark Crim, DERR Project Manager
Division of Environmental Response and Remediation
195 North 1950 West, 1st Floor
P.O. Box 144840
Salt Lake City, Utah 84114-4840
[phone]
TETRA TECH
3475 East Foothill Boulevard, Pasadena, CA 91107 USA p.+1 [phone]f.+1 [phone]
[e-mail]
Tetra Tech is Leading with Science® to provide innovative, sustainable solutions that help our clients address their water, environment, infrastructure,
resource management, energy, and international development challenges. We are proud to be home to leading technical experts in every sector and
to use that expertise throughout the project life cycle. Our commitment to safety is ingrained in our culture and at the forefront of every project. We
combine the resources of a global, multibillion dollar company with local, client-focused delivery. tetratech.com