Agenda packet — Burbank City Council, June 2, 2026 (part 17 of 21)

1 May 2025
SOP-20 SOIL GAS ACTIVE – INSTALL AND COLLECT
Scope and Application
The objective of this standard operating procedure (SOP) is to provide information regarding collection of soil gas samples for analysis of volatile organic compounds (VOCs) using active sampling techniques. The soil gas samples will be collected from soil gas probes (SGPs) that will be installed to depths between 5 feet below ground surface and 30 feet below ground surface.

The activities in this SOP are generally consistent with the Active Soil Gas Investigations Advisory (CalEPA, 2015). In various relevant regulatory guidance documents (CalEPA, 2023; State Water Board, 2019), the terms “soil vapor” and “soil gas” have been used interchangeably; EKI’s convention is to use the term “soil gas” except where well-established terms are used such as “soil vapor extraction” or “vapor pin”.

Specific step-by-step instructions regarding equipment need for and collection of soil gas samples are included in Attachment A. The instructions include:
• A detailed list of sampling equipment and materials;
• Additional equipment and material required for to collect field quality assurance/quality control (QA/QC) duplicates;
• How to:
• Set up sample trains and perform shut-in tests;
• Set up sample trains and perform shut-in tests;
• Perform leak testing using shrouds and leak check gas; and • Collect samples.
• Checks prior to shipment and specific information to include on the chain-of-custody regarding items for the laboratory to check the conditions of canisters.

This SOP describes use of a tracer gas, in particular 1,1-difluoroethane (DFA) for checking leaks.

If other gases are used, such as helium, or liquid tracers are used, such a 2-propanol (isopropyl alcohol), the site-specific work plan will include detailed instructions for use of that tracer. Field staff should verify with the EKI Project Manager that the procedures described herein are appropriate for the project. In the event that a project has site-specific procedures, protocols, and/or requirements, these procedures, protocols, and/or requirements should be followed in lieu of those described in this SOP.

In advance of field work, field staff should verify with the EKI Project Manager that the procedures described in this SOP are appropriate for the project. In the event that a project has site-specific procedures, protocols, and/or requirements, these procedures, protocols, and/or requirements should be followed in lieu of those described in this SOP. Work will be conducted under the supervision of a Licensed Site Professional (LSP), Licensed Environmental Professional (LEP), licensed Professional Geologist, and/or licensed Professional Engineer, as applicable.

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1.1 PRE-MOBILIZATION
Pre-mobilization activities will include:
• Discussing objectives and concerns with EKI Project Manager; • Preparing, or reviewing, proposal to client that details scope, schedule, and budget for the sampling activities;
• Notifying the regulatory oversight agency (e.g., Regional Water Quality Control Board; Department of Toxic Substances Control; County), if required; • Reviewing the site-specific workplan that was submitted to and approved by the regulatory oversight agency;
• Coordinating with property owners/tenants;
• Coordinating with analytical laboratory to obtain appropriate sample collection equipment (see Attachment A and Table 1) and courier contact info (or if not couriering, FedEx office location, hours, and EKI FedEx account number); • Coordinating and preparing work authorizations for drilling and coring subcontractors, including provisions for insurance certifications, if needed; • Preparing or updating the site-specific health and safety plan (HASP) for EKI personnel, if necessary; and
• Marking locations, clearing with a private utility clearing company, and calling Underground Services Alert (USA).

1.2 HEALTH AND SAFETY
Work will comply with all applicable California Occupational Safety and Health Agency (CalOSHA) requirements, the site’s health and safety procedures, and EKI’s site-specific Health and Safety Plan (HASP). EKI personnel will pay attention to potential physical hazards (e.g., trips, slips, falls, vehicles, rotating equipment, falling objects) while on site. EKI personnel working on-site will minimize contact with potential biological or chemical contaminants in soil, dust, and vapors using appropriate personal protection equipment (PPE).
• For direct contact with solids, PPE may include, but is not limited to, disposable protective clothing (e.g., Tyvek®), disposable gloves, and eye protection. • For vapors and dust, PPE may include air purifying respirators and/or self-contained breathing apparatus (SCBA) units, as necessary.

To screen for potential concerns related to organic vapors, EKI personnel should use a calibrated photoionization detector (PID) to measure volatile organic compounds (VOCs) and total petroleum hydrocarbons as gasoline (TPH-g) emanating from groundwater wells, soil gas wells, boreholes, excavations, and excavated soil and VOCs from within the breathing zone of personnel in the active work area. If this screening indicates elevated VOC levels are present, EKI personnel should implement the procedures described in the HASP and notify the EKI Project Manager.

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1.3 GENERAL PROCEDURES
At this time in California, it is expected that data pertaining to assessment of vapor intrusion will be uploaded to the State Water Resources Control Board’s (State Water Board) GeoTracker database. The State Water Board has developed guidance regarding the naming conventions for different types of air samples. It is important the sample names are selected upfront, to correspond with the GeoTracker requirements (State Water Board, 2019). The data formatting requirements for creation of an electronic deliverable format (EDF) need to be provided to the analytical laboratory in advance of sample analysis so that the laboratory prepares the EDF in a format that is compatible with GeoTracker requirements. The GeoTracker sample nomenclature identifies “SG” as the prefix for names of samples of soil gas collected exterior to buildings.

1.4 MATERIALS AND EQUIPMENT
The following table includes materials and equipment for the soil gas probes. The sample collection materials and equipment are provided in Attachment A.

Borehole depth • 5.5 feet bgs or 0.75 feet above shallow groundwater Borehole diameter • 4-inches (typically 4-inches with standard hand auger, 2.5-inches with direct push rig, 8- to 10-inches with hollow stem auger rig) Downhole probe tubing • Material: Teflon® fluorinated ethylene propylene tubing • Size:
o Outer diameter: 0.25-inch or 1/4-inch;
o Inner diameter: 0.188-inch or 3/16-inch;
o Wall thickness: 0.031 inch
Probe tip • Stainless-steel (SS) mesh screen, 3- or 6-inches long, 0.5-inch diameter, ¼-inch tubing fitting
• Depth to bottom of screen: borehole depth – 0.5 feet bgs • Depth to top of screen: depth to bottom of screen – screen length in feet bgs
Sand pack • Material: #3 sand (8x20 mesh)
• Top: borehole depth – screen length – 1 feet bgs
• Bottom: borehole depth (see above)
Dry granular bentonite • Material: medium granular bentonite, dry • Thickness above the sandpack: 6 inches
Grout • Material:
o Temporary probe (sampled for <1 year): hydrated granular bentonite
o Permanent probe (sampled for >1 year): neat cement grout with 1 to 5% bentonite
• Place from above the dry bentonite to the depth of the surface vault.

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Probe valve • SS plug valve with ¼-inch tubing compression fittings and cap o Swagelok Plug Valve, Part No.: SS-4P4T
o Swagelok Cap, Part No.: SS-400-P
• Install valve on top end of downhole tubing. Connect to downhole tubing using compression fitting.
• Keep valve closed and provide threaded cap on outlet when not used for sampling.

Surface finish Project Specific
• Plastic irrigation valve box
• Traffic-rated steel well box

1.5 INSTALLATION OF SOIL GAS PROBES
As noted above, soil gas probe locations will be cleared with USA and using a private utility locator. A hand auger will be used for the first five feet of each SGP. Deeper probes will be installed by direct push rigs or using a hollow-stem auger after hand clearing the top five feet.

Generic SGP construction details are included in Figure 1.

Each SGP will consist of a 3- or 6-inch long, ½-inch diameter stainless-steel wire mesh screen attached to a length of continuous ¼-inch diameter Teflon® fluorinated ethylene propylene (FEP) tubing (or equivalent) fitted at the top with a stainless-steel laboratory-grade plug valve using Swagelok-type compression-ferrule connections.

SGPs will be emplaced using an approximately 1-inch diameter threaded flush-joint polyvinyl chloride (PVC) emplacement “guide” pipe, to keep the screen and tubing centered in the borehole at the proper depth. SGP screens will be backfilled with a one-foot vertical filter pack at a minimum, consisting of prewashed silica sand, tremied slowly into the borehole. The SGP screen will be suspended using the guide pipe at the approximate center of the sand interval.

After emplacement of the sand, the guide pipe will be withdrawn, and slight tension will be maintained on the tubing to ensure it remains centered during sealing and grouting.

Above the sand, each SGP will be sealed with a 6-inch layer of dry medium granular bentonite, and above this layer, each borehole will be backfilled to approximately one foot below existing grade using grout (see above) (CalEPA, 2015). The SGP may be completed at the surface with a traffic-rated well box to protect the sampling valve or with a plastic irrigation box; the type of surface completion will be detailed in the site-specific work plan.

For SGPs installed using direct push, soil gas samples will not be collected until at least 2 hours have passed after installation of the SGPs, to allow subsurface conditions to re-equilibrate from drilling and SGP construction (CalEPA, 2015). For SGPs installed using a hand auger or hollowstem auger, soil gas samples will not be collected until at least 48 hours have passed after installation of the SGPs, to allow subsurface conditions to re-equilibrate from drilling and SGP construction (CalEPA, 2015).

After completion of soil gas sample collection, described below, the SGPs will be removed, if temporary, and the boring will be reamed, if necessary, and grouted to the surface.

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1.6 SUMMARY OF SOIL GAS COLLECTION PROCEDURES
SGPs will not be sampled during rainfall or within 5 days of a significant rainfall event (i.e., 0.5- inches or more of rain in a 24-hour period); however, soil gas sampling after rainfall can proceed where infiltration has not occurred, such as under buildings or beneath high-integrity pavement (CalEPA, 2015). Collect pressure measurements from each SGP prior to sample collection.

Samples will be collected in pre-evacuated 1-liter SUMMA®-passivated stainless-steel canisters using a 125 milliliter per minute (mL/min) flow restrictor. All materials used for sample collection, e.g., manifolds, hose barbs, sample tubing and fittings will be provided by the analytical laboratory.

Flow rates between 100 to 200 mL/min and vacuums less than 100-inches of water should be maintained during purging and sampling to minimize stripping (partitioning of vapors from pore water to soil gas), to prevent ambient air from diluting the soil gas samples, and to reduce variability between contractors. Maintaining these flow rates and vacuums will increase the likelihood that representative samples will be collected. A flow rate greater than 200 mL/min may be used when purging times are excessive, such as for deep wells with larger-diameter tubing. An oil-free vacuum pump can be used to purge soil gas wells. However, a vacuum of 100-inches of water or less will be maintained during sampling whenever a higher flow rate is used for purging. The pressure gauge used to measure vacuum should be calibrated and in good working order. When purging at rates of greater 200 mL/min, reduce the flow rate to 200 mL/min for sampling.

During soil gas sample collection, a temporary plastic shroud will be placed over the sampling apparatus at each location. A small amount of “leak-check” compound, DFA, will be sprayed into the shroud to create a measurable concentration of DFA in the air around the sampling apparatus. An air sample from within the shroud will be collected at each sampling location unless otherwise indicated in the site-specific work plan.

Specific details regarding soil gas collection are provided in Attachment A. If low flow conditions are observed, i.e., during sampling greater than 7.5 inches of mercury (in-Hg) (100-inches of water) on the manifold gauge are observed, sample collection guidelines to be followed are included in Attachment B.

1.7 FIELD AND LABORATORY QUALITY ASSURANCE/QUALITY CONTROL Field QA/QC is performed by collecting leak-check samples within the shroud and collecting field duplicates.

Field duplicate samples. Field duplicates are used to estimate sampling and laboratory analysis precision. field duplicate samples should be collected to match as best as possible the sampling location, time, and duration to create a matched pair for direct comparison. Field duplicate(s) will be collected at a rate of approximately 5% of the total number of samples (i.e., approximately 1 per 20 samples). In general, a minimum of one duplicate sample should be collected per sampling event.

1.8 LIST OF TABLES
Table 1 Project Specific Sampling Analysis and Scope
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1.9 LIST OF FIGURES
Figure 1 Generic SGP construction details
Figure 2 Soil Gas Sampling Setups with a Purge Canister

1.10 LIST OF ATTACHMENTS
Attachment A Step-by-Step Instructions for Soil Gas Sampling Attachment B Sampling Procedures if Low-Flow Conditions Are Observed

1.11 LIST OF FORMS
• Daily Field Notes
• Daily Safety Meeting Log (if working with subcontractor, e.g., drillers) • Sample Collection Log - Sub-Slab Soil Gas or Soil Gas Probes • Field sampling identification number for each sample; • Summa® canister serial number;
• Probe installation date and time;
• Measured in-situ vacuum or pressure at each location; • Shut-in test results;
• Purge information;
• Confirmation that leak check compound and a weighted shroud was used; • Date and time of collection for each sample;
• Summa® canister vacuums at beginning and end of sampling; • Post-sampling field measurements at each location.
• Chain-of-Custody Record

1.12 OTHER RELEVANT SOPS
• Sample Handling and Chain of Custody
• Field Notes and Photographs
• Management of Investigation Derived Waste

1.13 REFERENCES
CalEPA (2023). Final Draft Supplemental Guidance: Screening and Evaluating Vapor Intrusion.

California Environmental Protection Agency, Department of Toxic Substances Control, and State Water Resources Control Board. February 2023.

CalEPA (2015). Advisory Active Soil Gas Investigations, California Environmental Protection Agency (Department of Toxic Substances Control, Los Angeles Regional Water Quality Control Board, and San Francisco Regional Water Quality Control Board). July 2015.

State Water Board (2019). Guidance on Uploading Vapor Intrusion Information into GeoTracker, Electronic Submittal of Information Format, Version 1. State Water Resources Control Board, August 2019.

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TABLE 1 (EXAMPLE)

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Project-Specific Details for Soil Gas Sampling Event
Project Name: XXXXX
EKI Project Number: XXXXX
Date: XX July 2023

SAMPLING AND ANALYSIS SCOPE
Analytical Laboratory • K Prime Analytical, Santa Rosa, CA Number of samples and
canister certification
(canisters provided by
laboratory)
• Soil gas, 1-L batch certified canisters
o 19 soil gas samples in total, includes 1 field duplicate • Shroud Gas, 1-L batch certified canisters
o 18 leak-check shroud air samples (collect one at each sample location). Use a 6-L canister for the field duplicate sample location.

Soil Gas Sample Analyses • VOCs by USEPA TO-15 SIM
• 1,1-DFA by USEPA TO-3
• Standard TAT
Shroud Air Sample
Analyses
• 1,1-DFA by USEPA TO-3
• Standard TAT
Manifolds
(provided by laboratory)
• Soil Gas
o 17 single manifolds, batch certified
o 1 dual manifold (for field duplicate), batch certified • Shroud Air Samples
o 18 single manifolds, batch certified
Note: prior to ordering equipment from the laboratory and conducting the sampling event, double-check the quantity of samples with the EKI Project Manager in the event that the sitespecific work plan is revised.

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FIGURE 1

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FIGURE 2

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ATTACHMENT A

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SAMPLING EQUIPMENT AND MATERIALS
Sample canisters • 1-liter, pre-evacuated, SUMMA®-passivated stainless-steel canisters with inlet valves (provided by analytical laboratory).
o SUMMA® canisters may be either batch or individually certified based upon the sampling objectives (see Table 1).

Shroud air canister • 1-liter, pre-evacuated, SUMMA®-passivated stainless-steel canisters with inlet valves (provided by analytical laboratory).

Canister vacuum gauge • 0-30 in-Hg gauge (provided by analytical laboratory) connected between sample canister and flow controller.
o Prior to use, establish the maximum and minimum values on the gauge and record data on field form.

Manifold vacuum gauge • 0-30 in-Hg gauge (provided by analytical laboratory) connected between manifold valve and flow controller.
o Used to check for low-flow conditions during sampling, verify that the manifold vacuum gauge is installed ahead of the flow controller.

Manifolds • Single manifolds for each sample location (see Field QA/QC section below for duplicates) (provided by analytical laboratory). o Manifolds may be either batch or individually certified based upon the sampling objectives (see Table 1).

Flow controller/restrictor • Critical flow orifice rated for 100-200 mL/min (provided by analytical laboratory)
Sample tubing • Teflon (FEP), 1/4-inch outer diameter, new and unused (provided by analytical laboratory)
Fittings • Swagelok-type stainless-steel compression fittings for ¼-inch tubing. • Provided by laboratory.

Shroud • 30- to 40-gallon clear plastic trash bag; minimum plastic thickness 1.2 mil.

Leak check gas • 1,1-DFA (CAS No. 75-37-6) (provided in pressurized can by laboratory).

FIELD QA/QC - DUPLICATE SAMPLING EQUIPMENT
Shroud air canister • If the collection of concurrent duplicate samples is required, request 6-L SUMMA®-passivated stainless-steel canisters and inlet valves from analytical laboratory (the number of canisters and inlet values required is equal to the number of duplicate samples).

Manifolds • Request a dual manifold for each duplicate sample location (provided by analytical laboratory).
o Dual manifolds may be either batch or individually certified based upon the sampling objectives (see Table 1).

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ATTACHMENT A

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PRE-MOBILIZATION
Sample Container
Inventory and Field
Documents
• Verify correct number of SGPs, sample canisters, and manifolds • Prepare Chain-of-Custody.
• Print out Sample Collection Log - Sub-Slab Soil Gas or Soil Gas Probes (in addition to the standard field forms).

Site Coordination • Confirm onsite sampling schedule and site contact details.

PRE-SAMPLING MEASUREMENTS
Probe pressure (vacuum) • Attach sample tubing to probe valve and connect tubing to a vacuum gauge or digital manometer, capable of measuring 0.01 in-WC or less. • Open probe valve.
• Record pressure (or vacuum) in probe relative to outdoor air pressure.
• Close probe valve.
• Remove vacuum gauge.

Canister vacuum testing • Verify canisters remain at or near full vacuum (30 in-Hg) prior to sample collection. For sample canisters:
• Measure and record the canister vacuum during the shut-in test (see below).
• Sample canisters with a measured vacuum within 5% of full vacuum may be used for soil gas sample collection.
• For shroud air canisters:
• Measure and record the canister vacuum during the leak check setup (see below).
• Shroud air canisters with a vacuum within 10% of full vacuum may be used for shroud air sample collection for leak testing.

SAMPLING TRAIN SETUP AND SHUT-IN TEST
Sample Train Setup • Assemble sampling train (see Figure 2):
• Sample canister(s), sample tubing, and manifold with vacuum gauges and flow controller.

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ATTACHMENT A

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Shut-in test • After connecting sampling train to SGP, open the manifold valve and briefly open and then close sample canister valve. Keep probe valve closed throughout test.
• Open manifold valve while the probe valve is closed:
o Briefly open and then close sample canister valve.
o Allow 10 to 30 seconds for the vacuum to equilibrate in manifold. The vacuum may be lower than the initial vacuum as pressure equilibrates in the manifold tubing through the flow controller.
o After equilibration, observe and record vacuum reading on canister vacuum gauge (this is the start of the shut-in test). • Approximately 2 minutes after start of shut-in test, observe and record vacuum reading on canister vacuum gauge (this is the end of the shut-in test).
o Shut-in test is successful if vacuum is stable or decreases by less than 2 in-Hg over 2 minutes.
o If vacuum decreases by more than 2 in-Hg in 2 minutes:
 Close manifold valve and replace the tubing between the manifold valve and probe valve (this is the most common portion of sampling train to leak). Re-test to assess if the leak is fixed.
 Based on findings, check manifold fittings and re-test as needed.
• After a successful shut-in test, proceed with leak testing, purging, and sample collection.

LEAK TESTING
Leak Check Setup • Place plastic bag (“shroud”) around entire sampling setup, including probe, sample tubing, flow controller, and sample canister. • Secure base of shroud to the floor with sandbags or other weights.

Leak Check Procedure • Inject leak check gas into shroud for approximately 1 second immediately prior to beginning sampling; if the sampling duration is longer than 10 minutes, inject additional leak check gas into the shroud every 10 minutes.
• Objective is to provide a concentration of approximately 3,000 to 30,000 ppmv of leak check gas in the shroud air during sample collection.
• Collect a sample of the shroud air in the shroud air canister concurrent with soil gas sample collection (see below).

Leak Check Evaluation • Both the sample canister and the shroud air canister will be analyzed for DFA at the laboratory. A DFA concentration in the sample canister of 5% or less of the DFA concentration in the shroud air canister is acceptable (indicates a leak of 5% or less).

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ATTACHMENT A

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PRE-SAMPLE PURGE
Purge volume • One purge volume is the volume of downhole probe tubing, probe tip, and pore space in the sand pack and dry bentonite. For example:
o Downhole probe tubing: 5 feet (150 cm) long, 0.4 cm ID: volume = 19 mL
o Probe tip: 3 inches (7.6 cm) long, 0.5-inch (1.3 cm) diameter:
volume = 10 mL
o Sand pack and bentonite: 18 inches (46 cm) long, 3.5 inches (8.9 cm) diameter, and assuming 40% porosity: volume = 1,145 mL o Total volume = 1,174 mL (= 1.2 L)
o 3 purge volumes = 3.6 L
o Purge 3.6 L prior to sample collection
Purge Device • 6-liter pre-evacuated purge canister, or • Oil-free vacuum pump
Pre-sample purge • After completing the shut-in test and setting up the leak check shroud:
o Open manifold valve and probe valve.
o Open valve on purge canister inlet and record initial vacuum. o Inject leak check gas into the shroud, as described above. o Wait for vacuum on the purge canister vacuum gauge to decrease the appropriate amount for the desired purge volume.  Volume removed (liters) = [Change in vacuum (in-Hg)] / [29.9 in-Hg] x [canister volume (liters)]
 For a 6-liter canister, vacuum decreases 5 in-Hg for each oneliter of purge volume.  For a 3.6 L purge, vacuum should decrease 18 in-Hg.
o When vacuum decreases for the required purge volume, close purge canister valve.
o Monitor the manifold vacuum gauge reading periodically during purging to verify the manifold vacuum gauge does not exceed

7.5 in-Hg (appx. 100 in-WC). If exceeded, stop and follow the low-flow sampling procedures listed in Attachment B. Record if low-flow conditions were observed.
• Estimated purge time: 3.6 L at 125 mL/minute = 30 minutes

SAMPLE COLLECTION
Sampling Setup
Verification
• Verify sampling setup, installed as described in prior steps, includes:
• Sample canister (with inlet valve closed)
• Canister vacuum gauge
• Flow controller
• Manifold vacuum gauge (verify gauge is installed ahead of the flow controller)
• Sample tubing connected to SGP
• Shroud covering sampling setup
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ATTACHMENT A

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Soil Gas and Shroud
Sample Collection
• Simultaneously open inlet valves on sample canister and shroud canister, and immediately inject leak check gas into shroud (see above).
• Verify the base of shroud is secured against the floor with sandbags or other weights.
• Open manifold valve and record initial vacuum in each canister. • Monitor the manifold vacuum gauge reading periodically during sampling to verify the gauge does not exceed 7.5 in-Hg (appx. 100 inWC). If exceeded, stop and follow the low-flow sampling procedures listed in Attachment B. Record if low-flow conditions were observed. • Monitor the canister vacuum gauge and wait for vacuum to decrease to between 1 and 5 in-Hg (2-3 in-Hg is ideal).
• Simultaneously close valves on sample canister and shroud canister.

Record the final vacuum in each canister.
• Close manifold valve.
• Close soil gas probe valve.
• Remove shroud.
• Remove sample canister, manifold, and sample tubing. Before disconnecting the sample tubing from the probe valve, attach a 2- inch length peroxide cured silicone tubing onto the end of the sample (Teflon) tubing, and while opening the probe valve simultaneously insert the PID and other meters23, if being used, to obtain field readings and record on field form. Objective is to capture the soil gas sample stream immediately following sample collection – if multiple field meters are used, verify the probe valve is closed each time between switching field meters.
• Prepare sample canisters for transport to the laboratory. • Secure the protective cap and secured cover (if applicable) at the sample location.

SAMPLE SHIPPING
Sample Packaging and
Shipment
• Double-check that sample canister valve and threaded cap are tightly closed (finger-tight only, no wrenches).
• Place completed and signed Chain of Custody form in the box with the filled samples containers.
• Place a signed Custody Seal(s) on the boxes containing the filled sample canisters.
23 Methane meters or combustible gas meters may also be used. Required use of other meters will be included in the site-specific work plan. The meters will be used in accordance with manufacturers specifications.

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ATTACHMENT A

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Abbreviations:
cm: centimeters in-WC: inches water column QA/QC: quality assurance/quality control DFA: 1,1-difluoroethane mL: milliliters
ID: inner diameter PID: photoionization detector
in-Hg: inches mercury ppmv: parts per million by volume ATTACHMENT 6 - 3519
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ATTACHMENT B

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SAMPLING PROCEDURES IF LOW-FLOW CONDITIONS ARE OBSERVED (>7.5 in-Hg on manifold gauge during initial sampling attempt)
Soil Gas and Shroud
Sample Collection
• If 7.5 in-Hg (approximately. 100 in-WC) is exceeded during sampling, follow the steps listed below. Note that low-flow sampling locations may need to be performed in a separate mobilization.
o Re-start the standard sampling process with a new sampling apparatus (new SUMMA®, manifold, etc.), and substitute a 6-L SUMMA® canister for the shroud sample (this is to ensure an adequate shroud sample volume for the extended sampling duration to collect aliquots of soil gas).
o Follow the Step-by-Step Instructions for Soil Gas Sampling (Attachment A).
o Monitor the manifold vacuum gauge reading during sampling to verify the gauge does not exceed 7.5 in-Hg (approximately 100 inWC). When this value is exceeded, record the observed low-flow conditions, time, and canister vacuum readings. Simultaneously close valves on sample and shroud canisters and close the manifold valve.
o Wait approximately 15 minutes to allow for soil gas equilibration in the subsurface.
o Simultaneously open valves on sample and shroud canisters, and open the manifold valve, and then immediately inject leak check gas into shroud. Record time, canister vacuum readings, and the manifold vacuum reading.
o Monitor the manifold vacuum gauge reading during sampling to verify the gauge does not exceed 7.5 in-Hg (approximately 100 inWC). If exceeded, stop and repeat the steps listed above, and increase the waiting time increment by 15 minutes (or as necessary) to collect sufficient aliquots of soil gas.
o Monitor the canister vacuum gauge and wait for vacuum to decrease to between 1 and 5 in-Hg (2-3 in-Hg is ideal). o Simultaneously close valves on sample canister and shroud canister. Record the final vacuum in each canister.
o Close manifold valve.
o Remove shroud.
o Remove sample canister, manifold, and sample tubing.
o Prepare sample canister for transport to the laboratory. o Secure the protective cap and secured cover (if applicable) at the sample location.

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SOP-7 Borehole Installation, Soil Sample Collection, and Borehole Abandonment

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SOP-7 BOREHOLE INSTALLATION, SOIL SAMPLE COLLECTION, AND BOREHOLE

ABANDONMENT
Scope and Application
This standard operating procedure (SOP) sets forth the general field procedures for the installation and abandonment of boreholes and the collection of soil samples. This SOP provides general information for the collection of samples to be analyzed for chemicals of concern, including volatile and non-volatile chemicals. A specific protocol for collection and field preservation of samples for volatile organic analyses, including total petroleum hydrocarbons as gasoline (TPH-g) and volatile organic compounds (VOCs) in accordance with United State Environmental Protection Agency (USEPA) Method 5035 are included in a separate SOP.

Borehole installation method should minimally alter the medium that is being investigated. It is essential that the drilling process does not introduce hazardous or foreign substances into the borehole or create conduits that: (a) introduce new soil or groundwater contaminants or (b) facilitate the spread of existing groundwater contaminants. This SOP describes the methods most commonly used by EKI for borehole installation for environmental investigations which include:
hand augering, direct push technology (DPT), and hollow-stem auger drilling.

EKI SOPs require hand-augering of all boreholes to a minimum of 5 feet below ground surface to determine if underground utilities are present.

This SOP does not address the following: multi-increment sample collection, collection of samples for per- and polyfluoroalkyl substances (PFAS), collection of soil gassamples, or collection of grab groundwater samples. Please refer to the specific SOPs for appropriate procedures for the collection of such samples.

The procedures in this SOP include:
• Installation of boreholes using hand auger, direct push, and selected drilling techniques and collection of soil samples;
• General processing of samples for chemicals of concern (COCs) and other analyses; • Borehole abandonment; and
• Field Quality Assurance/Quality Control (QA/QC).

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1.1 PRE-MOBILIZATION
Pre-mobilization activities will include:
• Preparing, or reviewing, proposal to client that details scope, schedule, and budget for the sampling activities. Discuss objectives and concerns with EKI Project Manager; • Notifying the regulatory oversight agency (e.g., Regional Water Quality Control Board, Department of Toxic Substances Control, County), if required; • Obtaining permits for drilling from County and/or City, if required, and notifying the permitting agency prior to fieldwork as required by the permit; • Coordinating with property owners/tenants;
• Checking out necessary equipment from EKI supply room/office (e.g., water level meter, peristaltic pump, tubing, etc.) and/or ordering rental equipment, if EKI equipment not available;
• Coordinating and preparing work authorizations for drilling subcontractors, including provisions for insurance certifications;
• Coordinating with analytical laboratory to obtain appropriate sample containers, minimum volumes, preservation requirements, sample handling, courier contact info (or if not couriering, FedEx office location, hours, and EKI FedEx account number); • Preparing or updating the site-specific health and safety plan (HASP) for EKI personnel, if necessary;
• Review historical sampling events to determine sampling requirements for Investigation Derived Waste (IDW); and
• Marking locations, clearing with a private utility clearing company, and calling Underground Services Alert (USA).

To screen for potential concerns related to organic vapors, EKI personnel should use a calibrated photoionization detector (PID) to measure volatile organic compounds (VOCs) and total petroleum hydrocarbons as gasoline (TPH-g) emanating from groundwater wells, soil gas wells, boreholes, excavations, and excavated soil and VOCs from within the breathing zone of personnel in the active work area. If this screening indicates elevated VOC levels are present, ATTACHMENT 6 - 3522
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EKI personnel should implement the procedures described in the HASP and notify the EKI Project Manager.

1.3 MATERIALS AND EQUIPMENT
SOP-specific equipment • Hand auger and extension rod, with additional auger head for the materials likely to be encountered:
o Open mud-auger head (with cutouts) for clay;
o Normal cylindrical head for sandy soil; and
o Sand head (with auger teeth touching each other) for loose sands and gravels.
• Extension rods for hand auger (allows deeper drilling with less effort) • Ratcheting handle for hand auger
• Liners for sampling equipment, if needed
• Slide Hammer
• Pipe wrenches (to remove hand auger bits)
• 5-gram EnCore® Samplers and EnCore® Standard T-Handle or 5-gram Terra Core® Samplers and pre-preserved vials obtained from the laboratory
• Glass sample jars obtained from the laboratory (4-, 8-, or 16-ounce jars dependent on the number of analyses being requested at the laboratory)
• Photoionization detector (PID)
• Stainless-steel trowels, spoons, or scoops
• Gloves
• Ziploc-type Bags
• Sample Labels
• Fine tip sharpie
• Plastic sheeting
General equipment and
materials
• Decontamination materials (e.g., deionized water, Alconox™, paper towels, bucket)
• Forms (see below) and pens
• Chain of custody
• Coolers with ice

1.4 DECONTAMINATION OF DRILLING AND SAMPLING EQUIPMENT
Decontamination of all reusable soil sampling equipment will be performed in accordance with EKI SOP-4 (Decontamination of Reusable Equipment).

1.5 HAND AUGER BOREHOLE INSTALLATION
As stated above, EKI standard operating procedures require hand-augering of all boreholes to a minimum of 5 feet below ground surface to determine if underground utilities are present. Hand augering may be performed by EKI field staff for shallow soil investigations without a drilling subcontractor. Typically, the down-hole end of the hand auger consists of a 2- to 4-inch stainlesssteel auger head with cutting teeth. The head of the hand auger is advanced by simultaneously ATTACHMENT 6 - 3523
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pushing and turning the attached handle with extension rods (if needed). Once the head of the hand auger is full of soil, the head is pulled to the surface and the soil is removed from the head and placed on plastic sheeting. Cored soil should be placed on the plastic sheeting in a line based upon the order it was removed so that the depth can be identified for sampling. Removal of soil from a hand-auger head is most easily accomplished by tapping the head with a rubber mallet, using light to no more than moderate force. Hand augers may appear to be tough, but they are surprisingly easy to break (and expensive to replace).

To sample soil from a hand augered borehole for volatile chemical analyses (e.g., TPH-g, VOCs, etc.), a down-hole undisturbed soil core should be collected using a slide hammer and sample barrel that is typically 6-inches long. At the desired sampling depth, the hand auger is removed, and the sample barrel is driven into undisturbed soil using a weighted hammer attachment. The 6-inch long sample barrel is fitted with two (2) 3-inch long, new, unused, stainless-steel sample liners that retain the undisturbed soil when brought back up from the borehole. The practical depth of sampling using a hand auger with or without a slide hammer depends upon the soil properties and depth of investigation. Sandy, incohesive soils may be difficult to retain within the sample barrel though “sand catcher” devices can help. Collection of soil samples using the slide hammer in clayey soils may be difficult due to increased friction and torquing of the hand auger extensions. Do not bend the slide hammer sampler when driving it downward or pulling it upward. One narrow bolt holds the head on, which can break if the force is not aligned with the axis of the sampler. Additional instructions regarding collection of soil samples for volatile compounds are included in EKI SOP-8 (Collection of Soil Samples for VOCs and TPH-g Using Method 5035).

If a slide hammer cannot be used to collect soil samples for volatile chemical analysis due to soil conditions, the most cohesive portions of hand augered soil should be selected and sub-sampled as described above.

1.6 DIRECT PUSH TECHNOLOGY FOR BOREHOLE INSTALLATION
DPT drilling rigs use hydraulically operated hammers to advance small-diameter hollow steel rods into the ground. For boreholes installed using DPT, drilling and sampling will be performed with a dual–tube sampling method that allows the outer drilling rods to remain in the ground to prevent borehole collapse and cross-contamination. An undisturbed, continuous soil core is then collected in inner sampling rods fitted with new, unused, butyrate plastic sample liners that are typically 4-feet long.

The filled soil core liner should be cut open lengthwise by the drilling subcontractor and placed on new plastic sheeting or a decontaminated core tray on the logging/sample processing table.

EKI field staff will then screen the soil core with the PID, collect soil samples, and describe the core as described below.

1.7 HOLLOW-STEM AUGER DRILLING FOR BOREHOLE INSTALLATION The hollow stem auger drilling method uses continuous flight augers that mechanically excavate soil cuttings from the borehole as the augers are pushed and rotated into the ground. The hollow ATTACHMENT 6 - 3524
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center of the auger allows access to the bottom of the hole without withdrawing the auger string and drilling bit. When the target sample depth is reached, an undisturbed soil sample is collected ahead of the auger string and drilling bit using a decontaminated steel split-spoon sampler. The split-spoon sampler is lowered to the bottom of the borehole and driven to a depth equal to the total length of the sampler, which is typically 18-inches or 24-inches long and 2-inches or 2.5- inches in diameter. The sampler is typically pounded into the ground in 6-inch intervals using a 140-pound weight (hammer) repeatedly dropped from a height of 30-inches or using a hydraulic hammer. The number of hammer blows is typically counted (blow counts) by the drilling contractor and recorded for each 6-inch interval, if requested by the field technician.

Split-spoon samplers can be fitted with 1.5-inch or 2-inch diameter stainless-steel liners, but liners should not be used for EKI projects unless specifically required by the site-specific work plan as collecting soil inside liners fitted into the split-spoon sampler makes screening and logging of the core more difficult. After retrieval, the split-spoon sampler will be opened by the drilling subcontractor and placed on new plastic sheeting or a decontaminated core tray on the logging/sample processing table. EKI field staff will then screen the soil core with the PID, collect soil samples, and describe the core as described below.

1.8 COLLECTION OF SOIL SAMPLES
After soil is collected for sampling as described above, EKI field staff will perform the following tasks:
• Record the amount of soil recovered for each sample interval; • Briefly examine the soil visually for obvious signs of contamination; • Screen the soil with the PID by placing the intake of the PID very close to the soil and record the PID reading for each 6-inch interval, if possible; and • Determine the sample collection interval as directed by the EKI work plan.

While performing these tasks, EKI field staff will take care to:
• Not collect soil that was in contact with the sidewalls of the barrel, liner, or sampler; • Always use decontaminated stainless-steel spatulas, spoons, or scoops to handle the soil; and
• Always don a new pair of nitrile gloves before handling the soil to prevent crosscontamination in the soil core.

Upon examination of the soil, EKI field staff should contact the EKI Project Manager if there are any questions or clarifications needed to determine the exact sample interval(s).

All samples will be labeled and handled in accordance with EKI SOP-2 (Sample Handling and Chain of Custody).

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1.8.1 Collection Of Soil Samples for Non-Volatile Chemical Analyses Samples collected for non-volatile analyses (e.g., metals, pesticides, polychlorinated biphenyls (PCBs), semivolatile organic compounds (SVOCs), etc.) will be collected by one of the following methods:
• Capping both ends of the sample liner with Teflon sheeting and tight-fitting high-density polyethylene end caps;
• Placing soil directly into laboratory-supplied glass jars using a decontaminated stainlesssteel spatula, spoon, or scoop; or • Donning a new pair of nitrile gloves before placing soil into the jar by hand.

1.8.2 Collection Of Soil Samples For Volatile Chemical Analyses Samples collected for volatile chemical analyses (TPH-g, VOCs, etc.) will be sub-sampled in general accordance with USEPA’s Method 5035 Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples, as described in EKI SOP-8 (Collection of Soil Samples for VOCs and TPH-g Using Method 5035). USEPA Method 5035 describes several methods for preserving soil samples in the field, including sub-sampling devices which preserve or seal the soil sample from the atmosphere, such as the EnCore® sampler or field preservation of soil samples in pre-preserved vials obtained from the laboratory.

If required by the site-specific work plan, soil samples for volatile chemical analyses collected for characterization for off-site disposal at a landfill may be collected in a 1.5-inch or 2-inch diameter sample liner capped at both ends with Teflon sheeting and tight-fitting high-density polyethylene end caps.

1.9 BOREHOLE SOIL DESCRIPTION AND LOGGING
Soil from borehole drilling will be logged by EKI field staff using the Unified Soil Classification System (USCS). Soil color will be described in accordance with The Munsell Soil Color Charts. EKI field staff will record descriptions of the soil core on the Borehole and Well Construction Log form. EKI field staff that are logging soil core will be California-registered Professional Geologists or will be working under the supervision of a professional geologist or engineering geologist that is registered in the State of California or a Licensed Site Professional (LSP), Licensed Environmental Professional (LEP), licenced Professional Geologist, and/or licensed Professional Engineer, as applicable.

1.10 BOREHOLE ABANDONMENT
Abandonment of the borehole will be conducted in accordance with the permits for drilling from the County and/or City, if required, and/or the appropriate State of California Well Standards, including California Department of Water Resources (DWR) Bulletins 74-81 (DWR, 1981) and 74- 90 (DWR, 1991).

1.11 INVESTIGATION DERIVED WASTE (IDW)
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(e.g., 55-gllon drums or roll-off bins) and processed in accordance with the EKI SOP-3 (Management of Investigation Derived Waste).

1.12 FIELD QUALITY ASSURANCE/QUALITY CONTROL
Field QA/QC samples for soil samples may include equipment blanks, matrix spike/matrix spike duplicates, and temperature blanks.

Equipment blank: Equipment blank samples are used to assess the adequacy of the implemented decontamination procedures and/or to evaluate potential contamination from the equipment used during sampling. An equipment blank is a sample of purified (e.g., distilled) water that has been poured over decontaminated reusable sampling equipment before sampling. The equipment blank sample should be collected in a clean, unused 1-Liter amber bottle and decanted into the appropriate laboratory-supplied containers for the analyses specified in the site-specific work plan for the equipment blank. In general, one equipment blank sample should be collected and analyzed for every 20 soil samples that are collected for analysis.

For each sampling event, EKI personnel will collect the following field QA/QC samples for analysis by the laboratory, unless otherwise specified in the site-specific work plan.

Temperature blank: A temperature blank is a small container (e.g., a 40 mL VOA vial or small plastic sampling bottle) that is filled with distilled water; one temperature blank should be placed into each cooler that is shipped to the analytical laboratory. The temperature of the temperature blank is measured at the analytical laboratory to evaluate if the samples were adequately cooled during shipment to the laboratory.

If specifically required by the site-specific work plan, the following Field QA/QC samples should also be collected:

MS/MSD samples: Matrix spike (MS) and matrix spike duplicate (MSD) samples are duplicate samples that are submitted to the analytical laboratory to evaluate the QA/QC procedures of the analytical laboratory using site-specific matrices. Consult with the analytical laboratory to determine how many additional samples are required for the analysis of VOCs or TPH-g. In general, one MS/MSD sample should be collected and analyzed for every 20 soil samples that are collected for analysis.

1.13 LIST OF ATTACHMENTS
Attachment A Borehole and Well Construction Log

1.14 LIST OF FORMS
• Daily Field Notes
• Daily Safety Meeting Log (if working with subcontractor, e.g., drillers) • Borehole and Well Construction Log
• Chain-of-Custody Record

1.15 OTHER RELEVANT SOPS
• Collection of Soil Samples for VOCs and TPH-g Using Method 5035 ATTACHMENT 6 - 3527
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• Photoionization Detector Calibration and Use
• Decontamination of Reusable Equipment
• Sample Handling and Chain of Custody
• Field Notes and Photographs
• Management of Investigation Derived Waste

1.16 REFERENCES
DTSC, 2013. Drilling, Logging, and Sampling at Contaminated Sites, Department of Toxic Substances Control, California Environmental Protection Agency, June 2013.

DWR, 1981. Water Well Standards: State of California. Department of Water Resources, Bulletin 74-81, December 1981.

DWR, 1991. California Well Standards. Department of Water Resources, Bulletin 74-90 (Supplement to Bulletin 74-81), June 1991.

Munsell, 2019. Munsell Soil Color Charts, Munsell Color, 2019.

USEPA. 2002. Method 5035A (SW-846): Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples, Draft Revision 1. Washington, DC.

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SOP-8 COLLECTION OF SOIL SAMPLES FOR VOCS AND TPH-G USING METHOD 5035 Scope and Application
Traditional soil sampling methods have been shown to result in significant losses of volatile organic compounds (VOCs) and/or total petroleum hydrocarbons in the gasoline range (TPH-g).

The purpose of this standard operating procedure (SOP) is to implement sample collection and handling procedures that will minimize losses of VOCs and/or TPH-g in solid samples and thus obtain more representative results. This SOP addresses select aspects of sample collection, handling, preparation, and shipment in accordance with the United States Environmental Protection Agency (USEPA) Method 5035A (SW-846): Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples (USEPA, 2002). It does not address non-field related requirements of SW-846 Method 5035A guidance such as sampling design, laboratory quality assurance/quality control procedures, or laboratory analytical methods, etc.

To minimize the time during which samples are exposed to atmospheric conditions (i.e., under conditions which facilitate the volatilization, and hence loss, of VOCs and TPH-g from the sample), a hand-operated cylindrical coring device (e.g., EnCore® or Terra Core® samplers) is used to collect the samples. While the procedures for sampling cohesive granular materials using EnCore® and Terra Core® samplers are similar, the sample preservation requirements for each technique are significantly different. Regardless of which sampling methodology is employed, several (typically between 3 and 5) collocated sub-samples will be required for each sample location.

The procedures in this SOP include:
• Soil sample collection using EnCore® and Terra Core® samplers; • Sample preservation; and
• Field quality assurance/quality control (QA/QC).

1.1 PRE-MOBILIZATION
Pre-mobilization activities will include:
• Reviewing the planned scope of work;
• Discussing sampling objectives and potential concerns with the EKI Project Manager; • Confirming whether the necessary sampling supplies are available and, if not, ordering these supplies from a product vendor or the analytical laboratory; and ATTACHMENT 6 - 3532
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• Coordinating with the analytical laboratory and/or courier to arrange for sample dropoff, pickup, and/or delivery.

SOP-specific equipment • 5-gram EnCore® samplers and EnCore® standard T-handle OR 5-gram Terra Core® samplers and three 40 milliliter (mL) VOA vials containing an appropriate volume of sample preservative16
• Standard ppm PID lamp 10.6 electron volts (eV)
• Disposable gloves
• Hand auger with extender pipe (if necessary), additional bit for clay (if necessary), and pipe wrenches
• Stainless-steel trowel
• Ziplock-type bags
• Sample labels
• Fine tip indelible marker (e.g., Sharpie)
General equipment and
materials
• Decontamination materials (e.g., deionized water, Alconox™, paper towels, bucket)
• Field notes and pens
• Chain of custody
• Coolers with ice, Ziploc-type bags, and bubble wrap
16 The sample preservative is typically distilled water, acidified distilled water, methanol, or sodium bisulfate. NOTE:

The use of acidified water is not recommended for the analysis of solids with significant levels of carbonates, because the acidified water and carbonates will result in effervescence and the loss of volatile compounds.

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1.3 MATERIALS AND EQUIPMENT

1.4 DECONTAMINATION
Decontamination of all reusable soil sampling equipment will be performed in accordance with EKI SOP-4 (Decontamination of Reusable Equipment).

1.5 SAMPLING FOR VOCS OR TPH-G
Don the appropriate PPE as specified in the site-specific HASP. Locate the sampling location and document pertinent information in the field notes. Using clean decontaminated tools, carefully remove stones, vegetation, debris, etc. from the surface of the sampling area. To minimize the loss of VOCs or TPH-g, expose a fresh soil surface for sampling and collect sub-samples for analysis as quickly as possible, taking special care to limit exposure and disaggregation of the soil’s physical structure. If the soil surface has been exposed for more than a minute or two, a fresh surface should be created just prior to sampling and sampling personnel should be prepared to collect the sub-samples immediately thereafter.

Details regarding sampling with EnCore® and Terra Core® samplers are provided below in Sections 1.5.1 and 1.5.2, respectively. For reporting VOCs and TPH-g in dry-weight concentrations, collect additional soil in a 4-ounce glass jar for the analysis of moisture content (if additional soil is collected for the analysis of other analytes (e.g., metals), it is not necessary to collect more material for the analysis of moisture content).

1.5.1 EnCore® Samplers
The EnCore® sampler is a sampling device that can be used as both a simultaneous coring tool for cohesive soils and a transport device to an offsite analytical laboratory. The EnCore® sampler consists of a cylindrical coring/storage chamber with a vapor tight plunger and cap. EnCore® samplers are single use devices that cannot be cleaned and/or reused and they will be used with the EnCore® T-handle.

New, unused EnCore® samplers are purchased by EKI and brought to the Site. In general, laboratories require collection of a minimum of three (3) EnCore® samplers per analysis (i.e., a total of six (6) EnCore® samplers would be required for VOCs and TPH-g analysis). EKI field personnel should contact the project analytical laboratory to confirm the number of EnCore® samplers required for the analyses outlined in the site-specific work plan.

To collect a sample using an EnCore® sampler, follow the steps below. • Using clean disposable gloves, remove the coring body (Figure 1) from the foil bag. • Hold the coring body and push the plunger rod down until the small o-ring rests against the tabs (if it is not already in this position).
• Depress the locking lever on the T-handle (Figure 1). Place coring body, plunger end first, into open end of T-handle, aligning the two slots on the coring body with the two locking pins in the T-handle. Twist the coring body clockwise to lock the pins in slots.

Confirm that coring body is locked in place.

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• Push the coring body of the sampler into the soil until the coring body is completely full; when full, the small o-ring will be centered in the T-handle viewing hole. • Visually confirm that there is no void space at the top of the sampler and that the sampled material extends slightly beyond the end of the sampler (no more than 1 millimeter). Wipe excess soil from exterior of the coring body using a clean paper towel. • Cap the coring body while it is still on the T-handle. Push the cap locking arms (Figure 2) over the flat area of the ridge (Figure 1) and twist to lock the cap in place. Cap will be properly seated to seal the sampler (Figure 2).
• Remove the capped sampler by depressing the locking lever on the T-handle while twisting and pulling the sampler from the T-handle.
• Lock the plunger by twisting the extended plunger rod counterclockwise until the wings (Figure 1) rest firmly against the tabs.
• Repeat the procedures above until the required number of sub-samples have been collected. To provide the laboratory with enough sample to meet applicable quality assurance and quality control (QA/QC) requirements and potential re-analysis needs, it is usually necessary to collect three (3) EnCore® samplers per analysis. • For moisture analysis as discussed above, place soil directly into the laboratory-supplied glass jar either by: (a) using a decontaminated stainless-steel spatula, spoon, or scoop; or (b) donning a new pair of nitrile gloves before placing soil into the jar by hand. • Place the sealed samplers into the EnCore® sampling bag and label the sampling bag with a unique sample name, the date and time of sampling, and other relevant project information and place the collected sub-samples into a cooler filled with ice. • Decontaminate all non-disposable sampling equipment, e.g., the T-handle.

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EnCore® Sampler EnCore® T-Handle
Side View Top View
Figure 1: Schematic diagrams of the EnCore® sampler and EnCore® T-handle.

Sampler Correctly Capped Sampler Incorrectly Capped
(Locking arm grooves seated over coring body
ridge)
(Cap appears crooked; locking arm grooves
not fully seated over coring body ridge)
Figure 2: Schematic diagram of correctly and incorrectly capped EnCore® samplers.

1.5.2 Terra Core® Sample Kits
Terra Core® samplers are a plastic one-time use transfer tool designed to collect 5-gram (or 10- gram) soil sub-samples and transfer the sub-sample to laboratory provided containers for in-field chemical preservation. Terra Core® samplers cannot be cleaned and/or reused. Each Terra Core® sampling kit obtained from the project laboratory will include three (3) or four (4) 40-milliliter ATTACHMENT 6 - 3536
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(mL) VOA vials with preservative, a glass sample jar for percent moisture analysis, and one disposable plastic Terra Core™ syringe. The preservative is placed into each VOA vial by the project laboratory; one of the VOA vials will contain methanol17 and the remaining VOA vials will contain distilled (DI) water or acidified water.18 The volume (in mL) of preservative in each VOA vial should match the mass (in grams) of the sample being collected (i.e., for 5-gram Terra Core® samplers, each of the vials should contain approximately 5 mL of liquid). Each of the VOA vials are pre-weighed and pre-labeled by the laboratory; it is imperative that the weight recorded on each vial remains legible upon receipt at the analytical laboratory. Only one sampling kit is required for the analysis of VOCs and TPH-g.19
To collect a sample using a Terra Core® sample kit, follow the steps below. • Using clean disposable gloves, prepare one of the VOA vials containing the sample preservative to receive the sampled material.
• With the plunger seated in the handle of a clean unused Terra Core® sampler, push the sampler into freshly exposed soil until the chamber is filled (Figure 3a). • Visually verify that the sampling chamber is filled; if it is not, press the sampler into the soil again. The sampled material should be flush with the mouth of the sampler; remove any excess material that extends beyond the mouth of the sampler (Figure 3b). • Wipe excess soil off of the sampler using a clean paper towel (Figure 3b). • Place the mouth of the sampler into the VOA vial containing the appropriate preservative and rotate the plunger that was seated in the handle top 90 degrees until it is aligned with the slots in the body (Figure 3c).
• To minimize splashing, hold the VOA vial and sampler at a slight angle and extrude the sample into the preservative by pushing the plunger down (Figure 3c). • Quickly remove the sampler from the VOA vial and recap the VOA vial. To make sure that the VOA vial is well sealed, remove any soil from the top and/or threads of the vial prior to re-capping.
• Ensure that all of the sampled material is covered by the sample preservative; if necessary, agitate the sample slightly to disaggregate the sample. • Using a fine tip indelible marker, fill out the label on the sealed VOA vial with a unique sample name, the date and time of sampling, the analyses required, and other relevant project information. Do not affix an additional label to the vial as it will alter the weight 17 The methanol preserved sample is for the analysis of samples that contain greater than 200 micrograms per kilogram (ug/kg) of total VOCs and the water preserved samples are used for the analysis of samples that contain less than 200 ug/kg of total VOCs.
18 The acidified water preservative is created by mixing sodium bisulfate with distilled water; for a 5-gram sample, approximately 1 gram of sodium bisulfate is dissolved in approximately 5 mL of distilled water. The analytical laboratory also typically includes a magnetic stir bar in the VOA vials that contain DI water/acidified water. 19 If both VOCs AND TPH-g will be analyzed, a total of four VOA vials are required (one containing methanol and the remaining three containing DI or acidified water); if only VOCs OR TPH-g will be analyzed, only three VOA vials are required (one containing methanol and the remaining two containing DI or acidified water).

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of the vial. Instead, affix any additional labels to the exterior of a Ziploc®-type bag in which the VOA vials are placed.
• Repeat the procedure above to fill the remaining VOA vials included in the sampling kit. • For moisture analysis as discussed above, place soil directly into the laboratory-supplied glass jar either by: (a) using a decontaminated stainless-steel spatulas, spoon, or scoop; or (b) donning a new pair of nitrile gloves before placing soil into the jar by hand. • Place the sealed vials into the sampling kit bag and label with a unique sample name, the date and time of sampling, and other relevant project information and place the collected sub-samples into a cooler filled with ice.
• For every 20 samples that are collected, one extra Terra Core® sampling kit should be collected and submitted for analysis for the analytical laboratory’s batch quality assurance quality control testing.
• Decontaminate all non-disposable sampling equipment.
(a) (b) (c)
Figure 3: Terra Core® sampling steps.

1.6 TRANSPORT, PRESERVATION, AND HOLDING TIMES
• Transport samples to the analytical laboratory on wet ice. • EnCore® samples will be extracted at the laboratory within 48 hours of being collected; EnCore® samples received within 48 hours of collection may instead be frozen on arrival at the analytical laboratory20 to extend the holding time to 14 days from the date of collection.
• Terra Core® samples preserved in DI water or acidified water will be shipped and delivered to the analytical laboratory for extraction within 48 hours of sample collection. If these samples cannot be extracted within 48 hours, the samples can be preserved by freezing the sample within 48 hours (to a temperature between -7 and -20 degrees Celsius); the frozen samples can then be shipped to the analytical laboratory where they will be thawed and extracted within 14 days of sample collection. 20 The laboratory must document that the samples were frozen and maintained at a temperature between -7 and - 20 degrees Celsius until extraction.

ATTACHMENT 6 - 3538
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Standard Operating Procedures
SOP-8 Collection of Soil Samples for VOCs and TPH-g Using Method 5035

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1 May 2025
• Methanol preserved samples will be extracted within 14 days of sample collection.

1.7 FIELD QUALITY ASSURANCE/QUALITY CONTROL
Field QA/QC samples for soil may include the collection of equipment blanks, matrix spike/matrix spike duplicate (MS/MSD) samples, and temperature blank; additional details about these samples are presented below.

1.8 LIST OF FORMS
• Daily Field Notes
• Chain-of-Custody Record

1.9 OTHER RELEVANT SOPS
• Field Notes and Photographs
• Sample Handling and Chain of Custody
• Photoionization Detector Calibration and Use
• Decontamination of Reusable Equipment
21 Typically, for EnCore®-based sampling an additional 2 EnCores® will need to be collected for the MS/MSD for VOCs and TPH-g; for Terra Core®-based sampling, and additional Terra Core® sampling kit will need to be used.

ATTACHMENT 6 - 3539
4512
Standard Operating Procedures
SOP-8 Collection of Soil Samples for VOCs and TPH-g Using Method 5035

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1 May 2025

1.10 REFERENCES
USEPA. 2002. Method 5035A (SW-846): Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples, Draft Revision 1. Washington, DC.

ATTACHMENT 6 - 3540
4513
Soil Vapor Sampling with H&P Equipment
Summary of Procedures
Revision 3
Revised: October 2024
Effective: October 2024
The information contained in this document is proprietary and intended for use with H&P services only. These soil vapor sampling procedures are the standard policies and practices communicated to clients for use with laboratory equipment supplied by H&P Mobile Geochemistry, Inc. The H&P client is responsible for following these procedures and for updating the text that follows to account for any modifications to the procedures.

ATTACHMENT 6 - 3541
4514
Description of SV Sampling with Helium Shroud
Revision: 3
Revised: 10/01/2024
Effective: 10/01/2024

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Soil Vapor Sample Collection

1.0 Sample Train Set-Up

1.1 Components of the Sampling Train
The H&P sampling train consists of an in-line gauge to monitor probe vacuum during purging, a gauge to monitor the summa canister vacuum during sampling, the summa canister container, and a purge device (i.e. syringe or pump).

1.2 Connecting the Sampling Train
The sampling train is assembled using a combination of Swagelok quick-connect fittings, luer lock valves, small amounts of connector Tygon tubing (installed flush, so as not to expose the tubing to the vapor sample), and zip ties. The sampling train is attached to the vapor probe via a luer lock connection between the one-way valve at the termination of the vapor probe, and a three-way valve that branches off to the purge device on one side, and the sampling container on the other side.

1.3 Conducting a Shut-In Test
Prior to purging and sampling, a shut-in test is conducted on the sampling train to check for leaks in the above-ground fittings. The shut-in test is conducted by attaching the complete sample train assembly to the termination valve on the soil vapor probe. With the valve attached to the soil vapor probe in the “off” position, a purge syringe or vacuum pump is used to evacuate the sample train of air to a minimum measured vacuum of approximately 100 inches of water. The vacuum is observed on an in-line vacuum gauge which is positioned prior to the purge syringe or vacuum pump. The vacuum gauge is observed for one minute and all above ground connections will be considered “air-tight” if the pressure on the gauge does not noticeably dissipate. If there is an observable loss in vacuum, the fittings in the sample assembly are checked and tightened, and the test is repeated. Sampling is not commenced until the above ground fittings are deemed air-tight.

2.0 Leak Check
A leak test is performed on each individual soil vapor sample probe in order to test the integrity of the entire sampling system. Its purpose is to evaluate whether an adequate seal is established at the soil vapor probe interface with the ground surface, as well as a leak check of all above ground fittings to ensure that the samples collected are not being diluted by ambient air.

ATTACHMENT 6 - 3542
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Description of SV Sampling with Helium Shroud
Revision: 3
Revised: 10/01/2024
Effective: 10/01/2024

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2.1 Liquid Leak Check Compounds
Liquid leak check compounds, such as Difluoroethane (DFA) or Tetrafluoroethane (PFA) can be used to evaluate sample integrity. The liquid tracer compound is applied to a towel and kept in a closed plastic zip lock bag until it is ready to be used. Prior to purging and sampling of the soil vapor probe, the towel is emptied from the plastic bag and placed directly at the point of entry of the soil vapor probe into the borehole. This is used to test the integrity of the construction of the soil vapor probe. Additional saturated towels can also be set near all above ground sample train connections to ensure there are no leaks in the above ground fittings as well. The towel used for the leak detection can be reused between samples and should be refreshed with the liquid compound prior to each purging and sampling event. If the purging and sampling collection takes longer than five minutes in duration, the liquid tracer should be reapplied to the cloth, or steps should be made to contain the compound within an enclosure.

2.1 Gaseous Leak Check Compounds
Gaseous tracer compounds, such as helium, can be used to evaluate sample integrity.

The tracer gas is contained in a shroud which is then placed over the soil vapor probe location, or the entire sample train, evaluating any leaks in the sampling system. More details can be found in attached Appendix B.

3.0 Purging the Soil Vapor Probe

3.1 Calculating Purge Volume
The purge volume of a soil vapor well is defined as the internal volume of the length of tubing used in the construction of the soil gas well added to the “dead space volume” of the sand pack around the probe tip/filter, as well as the “dead space volume” of the dry bentonite placed above and below the sand pack. Purge volume definitions and calculations will vary based on local and state regulations, as well as individual client interpretations of purge volume.

3.2 Removing the Purge Air from the Soil Vapor Probe
Depending on the volume of purge air that is required to be removed from the soil vapor probe, there are two options that can be used for purging. For smaller purge volumes, a plastic, gas-tight, calibrated syringe is used to purge the probe. For larger purge volumes, a vacuum pump is used. The purging device is attached to a 3-way valve (or a tee fitting) which is then connected to the on/off valve on the soil vapor probe. This 3-valve allows the sample train to be connected to one port on the valve, and the purge equipment to be attached to the other. This ensures that all of the sample train assembly being used for the collection of the sample will be upstream of the purging device, and therefore eliminates any potential for cross contamination.

ATTACHMENT 6 - 3543
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Description of SV Sampling with Helium Shroud
Revision: 3
Revised: 10/01/2024
Effective: 10/01/2024

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3.3 Purge/Sample Flow Rate and Applied Vacuum
Flow rates between 100 to 200 mL/min and probe vacuum pressures of less than 100 inches of water are maintained during purging and sampling of the soil vapor probe to minimize stripping, and to prevent ambient air from diluting the soil vapor samples.

When using a syringe for purging and sample collection, flow rates can be monitored by timing the interval at which the plunger is drawn. A 60 mL syringe will take approximately 20 seconds to fill in order to maintain a 200 mL/min flow rate. When using a vacuum pump, in-line calibrated flow meters are used to accurately monitor flow rates. These flow meters have metering valves which allow the flow rates to be increased or decreased to the appropriate rate.

An in-line vacuum gauge is used when purging with a syringe or a pump in order to maintain probe vacuum pressures less than 100” of water. If, while purging, vacuum pressure exceeds 100” of water, the client will be informed that the soil vapor probe location appears to be in a low-permeable soil formation. The sample technician will then slow the purge flow rate to a rate of 100 mL/min in attempt to maintain flow and keep the applied vacuum below 100” water.

4.0 Collecting the Sample
Soil Vapor samples are collected in the appropriate gas-tight container required for specific projects and analysis needed. All sample collection assemblies and containers should be attached to the soil vapor probe via a 3-way valve prior to the purging device in order to avoid cross contamination.

4.1 Glass Syringes
H&P uses an airtight calibrated glass syringe for sample collection to be analyzed by the mobile on-site laboratory. The glass syringe is attached via a luer lock connection to a 3- way valve, which allows sample to be drawn into the syringe and then sealed off by rotating the valve. The syringe is attached to the “T” fitting (or 3-way valve) connected to the soil vapor probe on/off valve, and prior to the purging device. After purging of the soil vapor probe has been completed, the valve is rotated so that the flow path of the soil vapor probe is diverted towards the sample syringe. The plunger is then slowly drawn back at a flow rate of 200 mL/min or less. When the plunger is pulled back and the soil vapor sample has been drawn into the syringe, the valve is shut off at the syringe. It is then disconnected and immediately wrapped in aluminum foil, or transferred to a cool, dark bag to prevent photo degradation of the target analytes from direct sunlight. The soil vapor holding time in the syringe should not exceed 15 minutes before it is transferred to the sample instrument.

4.2 Summa Canister
H&P provides summa canister volumes of 1L or smaller for soil vapor and subslab sampling (1L, 450mL, 400mL, or 200mL). The summa canisters are attached to a sample assembly (also called a flow regulator or flow restrictor) via a quick-connect fitting. The ATTACHMENT 6 - 3544
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Description of SV Sampling with Helium Shroud
Revision: 3
Revised: 10/01/2024
Effective: 10/01/2024

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sample assembly contains a vacuum gauge which is used to monitor the summa canister vacuum pressure, and a critical orifice which restricts the flow of air through the device at the desired rate. The leading end of the sample assembly contains a barb fitting which is attached to the “T” fitting (or 3-way valve) connected to the soil vapor probe on/off valve, and prior to the purging device. After purging of the soil vapor probe has been completed, the valve is rotated so that the flow path of the soil vapor probe is diverted towards the sample assembly and summa canister. The valve on the summa canister is then opened and sampling is commenced. Canister vacuum pressures are recorded prior to sampling, and again after sampling has been completed. It is H&P’s procedure to allow the vacuum pressure to zero with the collection of the sample. This allows the canister to be under zero pressure and thus, along with the shut-off male quick connect fitting and the canister valve, assures that there is no potential for unwanted air to enter the canister should a leak occur during transit. If requested, slight vacuum (two to four inches of mercury) may be left in the canister at the commencement of sampling. Summa canisters should be kept out of direct sun light and kept at room temperature until received by the laboratory. The soil vapor holding time in a summa canister should not exceed 30 days.

4.1 Tedlar Bags
H&P also uses new Tedlar Bags for sample collection to be analyzed by the mobile on-site laboratory. A disposable plastic syringe can be used by drawing the sample into the syringe, and then evacuating it through a side port in the 3-way valve into the Tedlar bag.

This process is repeated until the proper amount of sample is collected in the bag.

Samples collected in Tedlar bags should not be exposed to sunlight or extreme temperatures. Photo degradation of target analytes is possible with light exposure. The soil vapor holding time for Tedlar bags should not exceed 3 days.

ATTACHMENT 6 - 3545
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Phase I Environmental Site Assessment and Results of Phase II Sampling Investigation 110 West Olive Avenue, Burbank, CA

APPENDIX J
Los Angeles County Department of Environmental Health Soil Boring Permit ATTACHMENT 6 - 3546
4519

ENVIRONMENTAL HEALTH
Drinking Water Program
5050 Commerce Drive, Baldwin Park, CA 91706
Telephone: (626) 430-5420 • Facsimile: (626) 813-3013 • Email: [email protected] http://publichealth.lacounty.gov/eh/ep/dw/dw_main.htm
Work Plan Approval

WORK SITE ADDRESS CITY ZIP EMAIL ADDRESS FOR WELL PERMIT APPROVAL 110 W Olive Ave Burbank 91502 [email protected] NOTICE:
• WORK PLAN APPROVALS ONCE GRANTED, ARE VALID FOR 180 DAYS. 30 DAY EXTENSIONS OF WORK PLAN APPROVALS ARE CONSIDERED ON AN INDIVIDUAL (CASE-BY-CASE) BASIS AND MAY BE SUBJECT TO ADDITIONAL PLAN REVIEW FEES (HOURLY RATE AS APPLICABLE). • WORK PLAN MODIFICATIONS MAY BE REQUIRED IF WELL AND GEOLOGIC CONDITIONS ENCOUNTERED AT THE SITE INSPECTION ARE FOUND TO DIFFER FROM THE SCOPE OF WORK PRESENTED TO THE DEPARTMENT OF PUBLIC HEALTH—DRINKING WATER PROGRAM. • POTENTIAL APPROVALS ARE LIMITED TO COMPLIANCE WITH THE CALIFORNIA WELL STANDARDS AND THE LOS ANGELES COUNTY CODE AND DOES NOT GRANT ANY RIGHTS TO CONSTRUCT, RENOVATE, OR DECOMMISSION ANY WELL. THE APPLICANT IS RESPONSIBLE FOR SECURING ALL OTHER

NECESSARY PERMITS SUCH AS WATER RIGHTS, PROPERTY RIGHTS, COASTAL COMMISSION OR WATERMASTER APPROVALS, USE COVENANTS, ENCROACHMENT PERMISSIONS, UTILITY LINE SETBACKS, CITY/COUNTY PUBLIC WORKS RIGHTS OF WAY, ETC. • THIS PERMIT IS NOT COMPLETE UNTIL ALL OF THE FOLLOWING REQUIREMENTS ARE SIGNED BY THE DEPUTY HEALTH OFFICER. WORK SHALL NOT BE INITIATED WITHOUT A WORK PLAN APPROVAL STAMPED BY THE DEPARTMENT OF PUBLIC HEALTH—DRINKING WATER PROGRAM.

TO BE COMPLETED BY DEPARTMENT OF PUBLIC HEALTH—DRINKING WATER PROGRAM:
✔ WORK PLAN APPROVED FOR:
2 - Soil Borings/Exp. Holes
PERMIT
NUMBER: SR0435347 DATE: February 20, 2026
ADDITIONAL APPROVAL CONDITIONS:

You are hereby directed to follow the work plan conditions:
• Work plan approval is issued for scope of work submitted to the Drinking Water Program. Any modifications to the scope of work will require an additional work plan review.
• Ensure the borings/exploration holes are backfilled within 24 hours of boring construction. • Ensure to backfill using a tremie pipe under pressure or equivalent equipment with approved cement grout, proceeding upward from the bottom of the boring/exploration hole to surface. • Ensure soil borings are sealed per California Well Standards (Bulletins 74-81 and 74-90) o Cement grout mix ratio of 5-6 gallons of water per 94-pound bag of Portland cement. o Up to 6% of Bentonite may be added to the cement-based mix. o No hydrated Bentonite chips and/or soil cuttings.
• Borings/Exploration holes must comply with all applicable requirements published in the California Well Standards (Bulletins 74-81 and 74-90) and the Los Angeles County Code, Title 11.

Please note: We no longer allow soil vapor probes to be installed into ground water sample borings or borings that extend into ground water. Follow the Advisory Active Soil Gas Investigations July 2015: Cal EPA, DTSC, LA RWQCB and San Francisco RWQCB for vapor probe borings. We do not permit percolation test borings or soil vapor probe installations in the vadose zone.

APPROVED BY: Joseph Harris
REHS Environmental Health Specialist Ill
Drinking Water Program
Environmental Health Protection Division
Los Angeles County Department of Public Health
5050 Commerce Drive
Baldwin Park, CA 91706
Ph (626) 430 - 5420
[email protected]
ATTACHMENT 6 - 3547
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Phase I Environmental Site Assessment and Results of Phase II Sampling Investigation 110 West Olive Avenue, Burbank, CA

APPENDIX K
Daily Reports for Soil Sampling and Soil Vapor Installation and Sampling ATTACHMENT 6 - 3548
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ATTACHMENT 6 - 3549
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ATTACHMENT 6 - 3550
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ATTACHMENT 6 - 3551
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ATTACHMENT 6 - 3552
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Project:

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Personnel Onsite:

Daily Work
Summary:

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Special Conditions,
Scope Changes,
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Issues, Delays:

Field Notes:
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Daily Field Summary Report
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Equipment:

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Irvine, CA 9292614
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ATTACHMENT 6 - 3553
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ekı:

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ATTACHMENT 6 - 3554
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Phase I Environmental Site Assessment and Results of Phase II Sampling Investigation 110 West Olive Avenue, Burbank, CA

APPENDIX L
Lithologic Borehole Logs
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Phase I Environmental Site Assessment and Results of Phase II Sampling Investigation 110 West Olive Avenue, Burbank, CA

APPENDIX M
Laboratory Reports
ATTACHMENT 6 - 3582
4555

ANALYTICAL REPORT

PREPARED FOR
Attn: Kian Lew
EKI Environment & Water Inc
17880 Fitch
Irvine, California 92614
Generated 3/18/2026 7:49:55 PM

JOB DESCRIPTION
Borrmann Steel Company

JOB NUMBER
570-269712-1
See page two for job notes and contact information.

Tustin CA 92780
Suite 100
2841 Dow Avenue
Eurofins Calscience

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Eurofins Calscience
Eurofins Calscience is a laboratory within Eurofins Environment Testing Southwest, LLC, a company within Eurofins Environment Testing Group of Companies Job Notes
This report may not be reproduced except in full, and with written approval from the laboratory. The results relate only to the samples tested. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page.

The test results in this report relate only to the samples as received by the laboratory and will meet all requirements of the methodology, with any exceptions noted. This report shall not be reproduced except in full, without the express written approval of the laboratory. All questions should be directed to the Eurofins Calscience Project Manager.

Authorization
Generated
3/18/2026 7:49:55 PM
Authorized for release by
Erick Ovalle, Project Manager
[email protected]
(657)210-6331

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Table of Contents
Client: EKI Environment & Water Inc
Project/Site: Borrmann Steel Company
Laboratory Job ID: 570-269712-1

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Eurofins Calscience
3/18/2026
Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 1 2
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Definitions/Glossary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Qualifiers

GC/MS VOA
Qualifier Description
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Qualifier
GC/MS Semi VOA
Qualifier Description
*+ LCS and/or LCSD is outside acceptance limits, high biased.

Qualifier
*1 LCS/LCSD RPD exceeds control limits.

F1 MS and/or MSD recovery exceeds control limits.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. me LCS Recovery is within Marginal Exdeedance (ME) control limit range (± 4 SD from the mean).

GC Semi VOA
Qualifier Description
*+ LCS and/or LCSD is outside acceptance limits, high biased.

Qualifier
F1 MS and/or MSD recovery exceeds control limits.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

LCMS
Qualifier Description
*3 ISTD response or retention time outside acceptable limits.

Qualifier
Metals
Qualifier Description
F1 MS and/or MSD recovery exceeds control limits.

Qualifier
J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Glossary
These commonly used abbreviations may or may not be present in this report. ☼ Listed under the "D" column to designate that the result is reported on a dry weight basis Abbreviation
%R Percent Recovery
CFL Contains Free Liquid
CFU Colony Forming Unit
CNF Contains No Free Liquid
DER Duplicate Error Ratio (normalized absolute difference) Dil Fac Dilution Factor
DL Detection Limit (DoD/DOE)
DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision Level Concentration (Radiochemistry)
EDL Estimated Detection Limit (Dioxin)
LOD Limit of Detection (DoD/DOE)
LOQ Limit of Quantitation (DoD/DOE)
MCL EPA recommended "Maximum Contaminant Level"
MDA Minimum Detectable Activity (Radiochemistry)
MDC Minimum Detectable Concentration (Radiochemistry)
MDL Method Detection Limit
ML Minimum Level (Dioxin)
MPN Most Probable Number
MQL Method Quantitation Limit
NC Not Calculated
ND Not Detected at the reporting limit (or MDL or EDL if shown) NEG Negative / Absent
POS Positive / Present
PQL Practical Quantitation Limit
PRES Presumptive
QC Quality Control
RER Relative Error Ratio (Radiochemistry)
Eurofins Calscience

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Definitions/Glossary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Glossary (Continued)
These commonly used abbreviations may or may not be present in this report.

RL Reporting Limit or Requested Limit (Radiochemistry)
Abbreviation
RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin)
TEQ Toxicity Equivalent Quotient (Dioxin)
TNTC Too Numerous To Count
Eurofins Calscience

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Job Narrative
570-269712-1
The analytical test results presented in this report meet all requirements of the associated regulatory program listed on the Accreditation/Certification Summary Page, unless otherwise noted. Data qualifiers and/or narrative comments are included to explain any exceptions, if applicable. Regulated compliance samples (e.g. SDWA, NPDES) must comply with associated agency requirements/permits.
· Matrix-specific batch QC (e.g., MS, MSD, SD) may not be reported when insufficient sample volume is available or when sitespecific QC samples are not submitted. In such cases, a Laboratory Control Sample Duplicate (LCSD) may be analyzed to provide precision data for the batch.
· For samples analyzed using surrogate and/or isotope dilution analytes, any recoveries falling outside of established acceptance criteria are re-prepared and/or re-analyzed to confirm results, unless the deviation is due to sample dilution or otherwise explained in the case narrative.

Receipt
The samples were received on 3/2/2026 11:45 AM. Unless otherwise noted below, the samples arrived in good condition, and, where required, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 1.8°C and 2.1°C.

GC/MS VOA
Method 8260B: The method blank for analytical batch 570-705634 contained Methylene Chloride above the method detection limit.

This target analyte concentration was less than the reporting limit (RL) in the method blank; therefore, re-extraction and/or reanalysis of samples was not performed.

Method 8260B: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with analytical batch 570-705634. The laboratory control sample (LCS) was performed in duplicate (LCSD) to provide precision data for this batch.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

GC/MS Semi VOA
Method 8270C: The continuing calibration verification (CCV) associated with batch 570-704919 recovered above the upper control limit for 2,4-Dinitrophenol, 2-Nitrophenol and Benzoic acid. The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported. The associated samples are:EKI-SB-10-0.5 (570-269712-1), EKISB-10-2.0 (570-269712-2), EKI-SB-10-5.0 (570-269712-3), EKI-SB-1-5.5 (570-269712-4), EKI-SB-2-3.0 (570-269712-5), EKISB-3-5.5 (570-269712-6), EKI-DB-2-7.0 (570-269712-10), EKI-DB-2-15.0 (570-269712-11), EKI-UST-1-8.0 (570-269712-12), EKISB-1-7.0 (570-269712-14), EKI-SB-1-15.0 (570-269712-15), EKI-SB-7-2.5 (570-269712-17) and (CCVIS 570-704919/2).

Method 8270C: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for preparation batch 570-704242 and analytical batch 570-704919 recovered outside control limits for the following analytes: 2-Nitrophenol and Benzoic acid. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported.

Method 8270C: The RPD of the laboratory control sample (LCS) and laboratory control sample duplicate (LCSD) for preparation batch 570-704242 and analytical batch 570-704919 recovered outside control limits for the following analytes: Pyridine.

Method 8270C: The matrix spike/matrix spike duplicate (MS/MSD) for preparation batch 570-704242 and analytical batch 570-704919 exceeded control limits for the following analyte(s): Benzidine and Benzoic acid, Note that this analyte is a known poor performer when analyzed using this method.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Gasoline Range Organics
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Diesel Range Organics
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Pesticides
Case Narrative
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project: Borrmann Steel Company
Eurofins Calscience
Job ID: 570-269712-1 Eurofins Calscience

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Method 8141B: The continuing calibration verification (CCV) associated with batch 570-710088 recovered above the upper control limit for Azinphos-methyl, Demeton-o/s, Dichlorvos, Ethoprop and Mevinphos. The samples associated with this CCV were nondetects for the affected analytes; therefore, the data have been reported. The associated samples are:EKI-SB-4-5.5 (570-269712-7), EKI-SB-5-6.0 (570-269712-8), EKI-SB-6-4.5 (570-269712-9), EKI-DB-2-7.0 (570-269712-10), EKI-DB-2-15.0 (570-269712-11), EKI-SB-1-7.0 (570-269712-14) and EKI-SB-1-15.0 (570-269712-15).

Method 8141B: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for preparation batch 570-704317 and analytical batch 570-710088 were outside control limits.

Method 8141B: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for preparation batch 570-704317 and analytical batch 570-710088 recovered outside control limits for the following analytes: Dichlorvos and Mevinphos.

These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported.

Method 8141B: The continuing calibration verification (CCV) associated with 570-710088 recovered high and outside the control limits on one column. Results are confirmed on both columns and reported from the passing column. The associated samples are: (CCV 570-710088/17), (CCV 570-710088/18), (CCV 570-710088/27), (CCV 570-710088/28), (CCV 570-710088/36), (CCV 570-710088/37), (CCV 570-710088/45) and (CCV 570-710088/46).

No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Herbicides
Method 8321B: Internal standard responses were outside of acceptance limits for the following sample: EKI-DB-2-7.0 (570-269712-10). The sample(s) shows evidence of matrix interference.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Metals
Method 6020B: The matrix spike / matrix spike duplicate (MS/MSD) recoveries for preparation batch 570-704833 and analytical batch 570-706069 were outside control limits for one or more analytes. See QC Sample Results for detail. Sample matrix interference and/or non-homogeneity are suspected because the associated laboratory control sample (LCS) recovery is within acceptance limits.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

General Chemistry
No additional analytical or quality issues were noted, other than those described above or in the Definitions/ Glossary page.

Case Narrative
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project: Borrmann Steel Company
Eurofins Calscience
Job ID: 570-269712-1 (Continued) Eurofins Calscience

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Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Acetone ☼
RL
19 ug/Kg
MDL

9.1 Analyte Result Qualifier Unit Dil Fac D Method Prep Type 30 1 8260B Total/NA
Benzene 0.47 J 0.93 0.24 ug/Kg 1 ☼ 8260B Total/NA
Tetrachloroethene 0.30 J 0.93 0.21 ug/Kg 1 ☼ 8260B Total/NA DRO (C13-C22) 22 5.4 4.7 mg/Kg 1 ☼ 8015C Total/NA
ORO (C23-C40) 220 27 4.7 mg/Kg 1 ☼ 8015C Total/NA
Arsenic 2.56 0.509 0.226 mg/Kg 5 ☼ 6020B Total/NA
Barium 146 0.509 0.333 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.283 J 0.509 0.223 mg/Kg 5 ☼ 6020B Total/NA
Cadmium 0.195 J 0.509 0.170 mg/Kg 5 ☼ 6020B Total/NA
Chromium 18.4 0.509 0.315 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 8.37 0.509 0.190 mg/Kg 5 ☼ 6020B Total/NA
Copper 26.4 0.509 0.203 mg/Kg 5 ☼ 6020B Total/NA
Lead 17.8 0.509 0.192 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.514 0.509 0.284 mg/Kg 5 ☼ 6020B Total/NA
Nickel 14.9 0.509 0.287 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.01 0.509 0.435 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 41.8 0.509 0.316 mg/Kg 5 ☼ 6020B Total/NA
Zinc 83.2 5.09 2.13 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0371 J 0.0940 0.0227 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Acetone ☼
RL
20 ug/Kg
MDL

9.7 Analyte Result Qualifier Unit Dil Fac D Method Prep Type 23 1 8260B Total/NA
Benzene 0.77 J 0.98 0.25 ug/Kg 1 ☼ 8260B Total/NA
Tetrachloroethene 0.58 J 0.98 0.22 ug/Kg 1 ☼ 8260B Total/NA Toluene 0.39 J 0.98 0.26 ug/Kg 1 ☼ 8260B Total/NA
Bis(2-ethylhexyl) phthalate 0.47 J 0.51 0.22 mg/Kg 1 ☼ 8270C Total/NA Di-n-butyl phthalate 0.26 J 0.51 0.11 mg/Kg 1 ☼ 8270C Total/NA ORO (C23-C40) 8.7 J 26 4.5 mg/Kg 1 ☼ 8015C Total/NA
Arsenic 2.35 0.527 0.234 mg/Kg 5 ☼ 6020B Total/NA
Barium 125 0.527 0.345 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.282 J 0.527 0.231 mg/Kg 5 ☼ 6020B Total/NA
Chromium 17.9 0.527 0.327 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 7.78 0.527 0.196 mg/Kg 5 ☼ 6020B Total/NA
Copper 19.9 0.527 0.210 mg/Kg 5 ☼ 6020B Total/NA
Lead 24.4 0.527 0.199 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.636 0.527 0.294 mg/Kg 5 ☼ 6020B Total/NA
Nickel 12.1 0.527 0.298 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.01 0.527 0.451 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 39.3 0.527 0.327 mg/Kg 5 ☼ 6020B Total/NA
Zinc 67.1 5.27 2.20 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0363 J 0.0854 0.0206 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Acetone ☼
RL
28 ug/Kg
MDL
14 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J26 1 8260B Total/NA
Benzene 2.6 1.4 0.36 ug/Kg 1 ☼ 8260B Total/NA
Toluene 1.2 J 1.4 0.38 ug/Kg 1 ☼ 8260B Total/NA
Di-n-butyl phthalate 0.26 J 0.51 0.11 mg/Kg 1 ☼ 8270C Total/NA Arsenic 1.08 0.561 0.250 mg/Kg 5 ☼ 6020B Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-10-5.0 (Continued) Lab Sample ID: 570-269712-3 Barium ☼
RL

0.561 mg/Kg
MDL

0.367
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

94.0 5 6020B Total/NA
Chromium 11.5 0.561 0.348 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 6.57 0.561 0.209 mg/Kg 5 ☼ 6020B Total/NA
Copper 11.4 0.561 0.224 mg/Kg 5 ☼ 6020B Total/NA
Lead 2.46 0.561 0.212 mg/Kg 5 ☼ 6020B Total/NA
Nickel 8.36 0.561 0.317 mg/Kg 5 ☼ 6020B Total/NA
Selenium 0.668 0.561 0.480 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 30.1 0.561 0.349 mg/Kg 5 ☼ 6020B Total/NA
Zinc 41.0 5.61 2.35 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0274 J 0.0833 0.0201 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-1-5.5 Lab Sample ID: 570-269712-4 Bis(2-ethylhexyl) phthalate
RL

0.50 mg/Kg
MDL

0.22 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.45 1 8270C Total/NA
Di-n-butyl phthalate 0.26 J 0.50 0.11 mg/Kg 1 8270C Total/NA Arsenic 1.63 0.538 0.239 mg/Kg 5 6020B Total/NA
Barium 115 0.538 0.352 mg/Kg 5 6020B Total/NA
Chromium 16.3 0.538 0.334 mg/Kg 5 6020B Total/NA
Cobalt 6.91 0.538 0.201 mg/Kg 5 6020B Total/NA
Copper 15.6 0.538 0.215 mg/Kg 5 6020B Total/NA
Lead 2.90 0.538 0.203 mg/Kg 5 6020B Total/NA
Molybdenum 0.351 J 0.538 0.301 mg/Kg 5 6020B Total/NA
Nickel 10.9 0.538 0.304 mg/Kg 5 6020B Total/NA
Selenium 0.911 0.538 0.460 mg/Kg 5 6020B Total/NA
Vanadium 39.2 0.538 0.335 mg/Kg 5 6020B Total/NA
Zinc 46.4 5.38 2.25 mg/Kg 5 6020B Total/NA
Mercury 0.147 0.0817 0.0198 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Di-n-butyl phthalate
RL

0.50 mg/Kg
MDL

0.11 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.27 1 8270C Total/NA
Arsenic 2.91 0.430 0.192 mg/Kg 5 6020B Total/NA
Barium 159 0.430 0.282 mg/Kg 5 6020B Total/NA
Beryllium 0.279 J 0.430 0.189 mg/Kg 5 6020B Total/NA
Chromium 19.8 0.430 0.267 mg/Kg 5 6020B Total/NA
Cobalt 9.07 0.430 0.161 mg/Kg 5 6020B Total/NA
Copper 21.6 0.430 0.172 mg/Kg 5 6020B Total/NA
Lead 2.76 0.430 0.162 mg/Kg 5 6020B Total/NA
Molybdenum 0.303 J 0.430 0.240 mg/Kg 5 6020B Total/NA
Nickel 14.7 0.430 0.243 mg/Kg 5 6020B Total/NA
Selenium 1.07 0.430 0.368 mg/Kg 5 6020B Total/NA
Thallium 0.153 J 0.430 0.134 mg/Kg 5 6020B Total/NA
Vanadium 44.5 0.430 0.268 mg/Kg 5 6020B Total/NA
Zinc 55.1 4.30 1.80 mg/Kg 5 6020B Total/NA
Mercury 0.0366 J 0.0786 0.0190 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-SB-3-5.5 Lab Sample ID: 570-269712-6 Di-n-butyl phthalate
RL

0.49 mg/Kg
MDL

0.11 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.27 1 8270C Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-3-5.5 (Continued) Lab Sample ID: 570-269712-6 Arsenic
RL

0.507 mg/Kg
MDL

0.226
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

0.818 5 6020B Total/NA
Barium 86.9 0.507 0.332 mg/Kg 5 6020B Total/NA
Chromium 9.28 0.507 0.314 mg/Kg 5 6020B Total/NA
Cobalt 5.55 0.507 0.189 mg/Kg 5 6020B Total/NA
Copper 9.65 0.507 0.202 mg/Kg 5 6020B Total/NA
Lead 1.66 0.507 0.191 mg/Kg 5 6020B Total/NA
Nickel 6.42 0.507 0.286 mg/Kg 5 6020B Total/NA
Selenium 0.545 0.507 0.434 mg/Kg 5 6020B Total/NA
Vanadium 26.6 0.507 0.315 mg/Kg 5 6020B Total/NA
Zinc 30.7 5.07 2.12 mg/Kg 5 6020B Total/NA
Mercury 0.0329 J 0.0850 0.0206 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-SB-4-5.5 Lab Sample ID: 570-269712-7 Arsenic
RL

0.486 mg/Kg
MDL

0.216
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

3.76 5 6020B Total/NA
Barium 192 0.486 0.318 mg/Kg 5 6020B Total/NA
Beryllium 0.403 J 0.486 0.213 mg/Kg 5 6020B Total/NA
Chromium 24.4 0.486 0.301 mg/Kg 5 6020B Total/NA
Cobalt 11.6 0.486 0.181 mg/Kg 5 6020B Total/NA
Copper 29.2 0.486 0.194 mg/Kg 5 6020B Total/NA
Lead 3.16 0.486 0.183 mg/Kg 5 6020B Total/NA
Molybdenum 0.499 0.486 0.271 mg/Kg 5 6020B Total/NA
Nickel 18.5 0.486 0.274 mg/Kg 5 6020B Total/NA
Selenium 1.32 0.486 0.415 mg/Kg 5 6020B Total/NA
Thallium 0.182 J 0.486 0.152 mg/Kg 5 6020B Total/NA
Vanadium 55.4 0.486 0.302 mg/Kg 5 6020B Total/NA
Zinc 62.4 4.86 2.03 mg/Kg 5 6020B Total/NA
Mercury 0.0330 J 0.0850 0.0206 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-SB-5-6.0 Lab Sample ID: 570-269712-8 Arsenic
RL

0.556 mg/Kg
MDL

0.248
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

2.00 5 6020B Total/NA
Barium 190 0.556 0.364 mg/Kg 5 6020B Total/NA
Beryllium 0.269 J 0.556 0.244 mg/Kg 5 6020B Total/NA
Chromium 19.3 0.556 0.345 mg/Kg 5 6020B Total/NA
Cobalt 11.0 0.556 0.208 mg/Kg 5 6020B Total/NA
Copper 21.8 0.556 0.222 mg/Kg 5 6020B Total/NA
Lead 2.65 0.556 0.210 mg/Kg 5 6020B Total/NA
Molybdenum 0.944 0.556 0.311 mg/Kg 5 6020B Total/NA
Nickel 14.8 0.556 0.314 mg/Kg 5 6020B Total/NA
Selenium 1.02 0.556 0.476 mg/Kg 5 6020B Total/NA
Vanadium 44.0 0.556 0.346 mg/Kg 5 6020B Total/NA
Zinc 53.2 5.56 2.33 mg/Kg 5 6020B Total/NA
Mercury 0.0386 J 0.0887 0.0214 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-SB-6-4.5 Lab Sample ID: 570-269712-9 Arsenic
RL

0.536 mg/Kg
MDL

0.239
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

3.20 5 6020B Total/NA
Barium 171 0.536 0.351 mg/Kg 5 6020B Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-6-4.5 (Continued) Lab Sample ID: 570-269712-9 Beryllium
RL

0.536 mg/Kg
MDL

0.235
Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.386 5 6020B Total/NA
Chromium 23.1 0.536 0.333 mg/Kg 5 6020B Total/NA
Cobalt 10.6 0.536 0.200 mg/Kg 5 6020B Total/NA
Copper 25.2 0.536 0.214 mg/Kg 5 6020B Total/NA
Lead 2.88 0.536 0.202 mg/Kg 5 6020B Total/NA
Molybdenum 0.576 0.536 0.300 mg/Kg 5 6020B Total/NA
Nickel 17.1 0.536 0.303 mg/Kg 5 6020B Total/NA
Selenium 1.24 0.536 0.459 mg/Kg 5 6020B Total/NA
Thallium 0.184 J 0.536 0.167 mg/Kg 5 6020B Total/NA
Vanadium 51.2 0.536 0.333 mg/Kg 5 6020B Total/NA
Zinc 57.6 5.36 2.24 mg/Kg 5 6020B Total/NA
Mercury 0.0210 J 0.0817 0.0198 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Di-n-butyl phthalate
RL

0.49 mg/Kg
MDL

0.11 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.26 1 8270C Total/NA
ORO (C23-C40) 5.8 J 25 4.3 mg/Kg 1 8015C Total/NA
Arsenic 1.85 0.462 0.206 mg/Kg 5 6020B Total/NA
Barium 44.5 0.462 0.302 mg/Kg 5 6020B Total/NA
Cadmium 1.15 0.462 0.155 mg/Kg 5 6020B Total/NA
Chromium 65.2 0.462 0.286 mg/Kg 5 6020B Total/NA
Cobalt 2.86 0.462 0.172 mg/Kg 5 6020B Total/NA
Copper 10.2 0.462 0.184 mg/Kg 5 6020B Total/NA
Lead 4.52 0.462 0.174 mg/Kg 5 6020B Total/NA
Nickel 3.95 0.462 0.261 mg/Kg 5 6020B Total/NA
Silver 1.21 0.924 0.482 mg/Kg 5 6020B Total/NA
Vanadium 10.5 0.462 0.287 mg/Kg 5 6020B Total/NA
Zinc 41.0 4.62 1.93 mg/Kg 5 6020B Total/NA
Mercury 0.0458 J 0.0801 0.0194 mg/Kg 1 7471B Total/NA
Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Di-n-butyl phthalate
RL

0.49 mg/Kg
MDL

0.11 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.27 1 8270C Total/NA
Arsenic 3.89 0.508 0.226 mg/Kg 5 6020B Total/NA
Barium 233 0.508 0.333 mg/Kg 5 6020B Total/NA
Beryllium 0.439 J 0.508 0.223 mg/Kg 5 6020B Total/NA
Chromium 28.4 0.508 0.315 mg/Kg 5 6020B Total/NA
Cobalt 12.7 0.508 0.190 mg/Kg 5 6020B Total/NA
Copper 32.1 0.508 0.203 mg/Kg 5 6020B Total/NA
Lead 3.47 0.508 0.192 mg/Kg 5 6020B Total/NA
Molybdenum 0.415 J 0.508 0.284 mg/Kg 5 6020B Total/NA
Nickel 21.1 0.508 0.287 mg/Kg 5 6020B Total/NA
Selenium 1.48 0.508 0.435 mg/Kg 5 6020B Total/NA
Thallium 0.219 J 0.508 0.159 mg/Kg 5 6020B Total/NA
Vanadium 61.9 0.508 0.316 mg/Kg 5 6020B Total/NA
Zinc 70.5 5.08 2.12 mg/Kg 5 6020B Total/NA
Mercury 0.0372 J 0.0817 0.0198 mg/Kg 1 7471B Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Benzene ☼
RL

0.96 ug/Kg
MDL

0.25 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.33 1 8260B Total/NA
Toluene 0.39 J 0.96 0.26 ug/Kg 1 ☼ 8260B Total/NA
tert-Butyl alcohol (TBA) 5.7 J 19 ug/Kg2.9 1 ☼ 8260B Total/NA Bis(2-ethylhexyl) phthalate 0.61 0.54 0.23 mg/Kg 1 ☼ 8270C Total/NA Di-n-butyl phthalate 0.28 J 0.54 0.12 mg/Kg 1 ☼ 8270C Total/NA DRO (C13-C22) 8.0 5.4 4.8 mg/Kg 1 ☼ 8015C Total/NA
ORO (C23-C40) 38 27 4.8 mg/Kg 1 ☼ 8015C Total/NA
Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 tert-Butyl alcohol (TBA) ☼
RL
18 ug/Kg
MDL

2.7 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J2.7 1 8260B Total/NA
Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Di-n-butyl phthalate ☼
RL

0.61 mg/Kg
MDL

0.14 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.31 1 8270C Total/NA
Arsenic 2.01 0.585 0.260 mg/Kg 5 ☼ 6020B Total/NA
Barium 151 0.585 0.383 mg/Kg 5 ☼ 6020B Total/NA
Chromium 20.0 0.585 0.363 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 9.43 0.585 0.218 mg/Kg 5 ☼ 6020B Total/NA
Copper 18.9 0.585 0.233 mg/Kg 5 ☼ 6020B Total/NA
Lead 3.40 0.585 0.220 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.334 J 0.585 0.327 mg/Kg 5 ☼ 6020B Total/NA Nickel 14.1 0.585 0.330 mg/Kg 5 ☼ 6020B Total/NA
Selenium 0.969 0.585 0.500 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 46.4 0.585 0.364 mg/Kg 5 ☼ 6020B Total/NA
Zinc 55.5 5.85 2.44 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0640 J 0.0981 0.0237 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-1-15.0 Lab Sample ID: 570-269712-15 3/4-Methylphenol ☼
RL

1.1 mg/Kg
MDL

0.11 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J0.11 1 8270C Total/NA
Di-n-butyl phthalate 0.29 J 0.54 0.12 mg/Kg 1 ☼ 8270C Total/NA Antimony 1.45 F1 0.589 0.344 mg/Kg 5 ☼ 6020B Total/NA
Arsenic 3.16 0.589 0.262 mg/Kg 5 ☼ 6020B Total/NA
Barium 92.2 0.589 0.386 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.441 J 0.589 0.258 mg/Kg 5 ☼ 6020B Total/NA
Chromium 15.8 0.589 0.365 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 6.54 0.589 0.220 mg/Kg 5 ☼ 6020B Total/NA
Copper 15.5 0.589 0.235 mg/Kg 5 ☼ 6020B Total/NA
Lead 1.39 0.589 0.222 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.968 0.589 0.329 mg/Kg 5 ☼ 6020B Total/NA
Nickel 11.1 0.589 0.333 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.01 0.589 0.504 mg/Kg 5 ☼ 6020B Total/NA
Thallium 0.361 J F1 0.589 0.184 mg/Kg 5 ☼ 6020B Total/NA Vanadium 42.3 0.589 0.366 mg/Kg 5 ☼ 6020B Total/NA
Zinc 31.4 5.89 2.46 mg/Kg 5 ☼ 6020B Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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4567
Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Acetone ☼
RL
21 ug/Kg
MDL
10 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J17 1 8260B Total/NA
Benzene 1.4 1.1 0.27 ug/Kg 1 ☼ 8260B Total/NA
Toluene 0.63 J 1.1 0.28 ug/Kg 1 ☼ 8260B Total/NA
Arsenic 3.30 0.512 0.228 mg/Kg 5 ☼ 6020B Total/NA
Barium 217 0.512 0.335 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.598 0.512 0.224 mg/Kg 5 ☼ 6020B Total/NA
Chromium 27.3 0.512 0.318 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 12.0 0.512 0.191 mg/Kg 5 ☼ 6020B Total/NA
Copper 30.7 0.512 0.204 mg/Kg 5 ☼ 6020B Total/NA
Lead 4.60 0.512 0.193 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.481 J 0.512 0.286 mg/Kg 5 ☼ 6020B Total/NA Nickel 19.2 0.512 0.289 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.42 0.512 0.438 mg/Kg 5 ☼ 6020B Total/NA
Thallium 0.259 J 0.512 0.160 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 56.7 0.512 0.318 mg/Kg 5 ☼ 6020B Total/NA
Zinc 77.0 5.12 2.14 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0367 J 0.0979 0.0237 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 2-Butanone (MEK) ☼
RL
23 ug/Kg
MDL

5.3 Analyte Result Qualifier Unit Dil Fac D Method Prep Type J7.7 1 8260B Total/NA
Acetone 30 23 ug/Kg11 1 ☼ 8260B Total/NA
Benzene 0.31 J 1.2 0.30 ug/Kg 1 ☼ 8260B Total/NA
Benzo[k]fluoranthene 0.11 J 0.54 0.10 mg/Kg 1 ☼ 8270C Total/NA Di-n-butyl phthalate 0.27 J 0.54 0.12 mg/Kg 1 ☼ 8270C Total/NA Arsenic 3.10 0.593 0.264 mg/Kg 5 ☼ 6020B Total/NA
Barium 167 0.593 0.388 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.418 J 0.593 0.260 mg/Kg 5 ☼ 6020B Total/NA
Chromium 23.5 0.593 0.368 mg/Kg 5 ☼ 6020B Total/NA
Cobalt 10.2 0.593 0.221 mg/Kg 5 ☼ 6020B Total/NA
Copper 24.5 0.593 0.236 mg/Kg 5 ☼ 6020B Total/NA
Lead 5.13 0.593 0.223 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.477 J 0.593 0.331 mg/Kg 5 ☼ 6020B Total/NA Nickel 16.8 0.593 0.335 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.12 0.593 0.507 mg/Kg 5 ☼ 6020B Total/NA
Thallium 0.185 J 0.593 0.185 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 53.1 0.593 0.369 mg/Kg 5 ☼ 6020B Total/NA
Zinc 59.4 5.93 2.48 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0420 J 0.0867 0.0210 mg/Kg 1 ☼ 7471B Total/NA Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Acetone ☼
RL
27 ug/Kg
MDL
13 Analyte Result Qualifier Unit Dil Fac D Method Prep Type 32 1 8260B Total/NA
Benzene 0.53 J 1.3 0.34 ug/Kg 1 ☼ 8260B Total/NA
o-Xylene 0.38 J 1.3 0.34 ug/Kg 1 ☼ 8260B Total/NA
m,p-Xylene 1.2 J 2.7 0.63 ug/Kg 1 ☼ 8260B Total/NA
Xylenes, Total 1.6 J 2.7 0.80 ug/Kg 1 ☼ 8260B Total/NA
Arsenic 4.21 0.543 0.242 mg/Kg 5 ☼ 6020B Total/NA
Barium 227 0.543 0.355 mg/Kg 5 ☼ 6020B Total/NA
Beryllium 0.474 J 0.543 0.238 mg/Kg 5 ☼ 6020B Total/NA
Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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4568
Detection Summary
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Client Sample ID: EKI-SB-8-1.5 (Continued) Lab Sample ID: 570-269712-18 Chromium ☼
RL

0.543 mg/Kg
MDL

0.336
Analyte Result Qualifier Unit Dil Fac D Method Prep Type

29.8 5 6020B Total/NA
Cobalt 13.7 0.543 0.202 mg/Kg 5 ☼ 6020B Total/NA
Copper 36.3 0.543 0.216 mg/Kg 5 ☼ 6020B Total/NA
Lead 5.32 0.543 0.205 mg/Kg 5 ☼ 6020B Total/NA
Molybdenum 0.722 0.543 0.303 mg/Kg 5 ☼ 6020B Total/NA
Nickel 22.6 0.543 0.307 mg/Kg 5 ☼ 6020B Total/NA
Selenium 1.44 0.543 0.464 mg/Kg 5 ☼ 6020B Total/NA
Thallium 0.258 J 0.543 0.169 mg/Kg 5 ☼ 6020B Total/NA
Vanadium 64.3 0.543 0.337 mg/Kg 5 ☼ 6020B Total/NA
Zinc 81.3 5.43 2.27 mg/Kg 5 ☼ 6020B Total/NA
Mercury 0.0324 J 0.0874 0.0211 mg/Kg 1 ☼ 7471B Total/NA Eurofins Calscience
This Detection Summary does not include radiochemical test results.

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4569
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.93 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 0.93 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1,2,2-Tetrachloroethane ND 1.9 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 9.3 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1,2-Trichloroethane ND 0.93 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1-Dichloroethane ND 0.93 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1-Dichloroethene ND 0.93 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,1-Dichloropropene ND 1.9 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2,3-Trichlorobenzene ND 1.9 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2,3-Trichloropropane ND 1.9 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2,4-Trichlorobenzene ND 1.9 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2,4-Trimethylbenzene ND 1.9 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dibromo-3-Chloropropane ND 9.3 3.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dibromoethane ND 0.93 0.19 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dichlorobenzene ND 0.93 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dichloroethane ND 0.93 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dichloropropane ND 0.93 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,3,5-Trimethylbenzene ND 1.9 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,3-Dichlorobenzene ND 0.93 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,3-Dichloropropane ND 0.93 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,4-Dichlorobenzene ND 0.93 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 2,2-Dichloropropane ND 4.6 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 2-Butanone (MEK) ND 19 4.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 2-Chlorotoluene ND 0.93 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 2-Hexanone ND 19 2.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 4-Chlorotoluene ND 0.93 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 4-Methyl-2-pentanone (MIBK) ND 19 2.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Acetone 30 19 9.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Benzene 0.47 J 0.93 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Bromobenzene ND 0.93 0.19 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Bromochloromethane ND 1.9 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Bromodichloromethane ND 0.93 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Bromoform ND 4.6 1.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Bromomethane ND 19 6.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 cis-1,2-Dichloroethene ND 0.93 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 cis-1,3-Dichloropropene ND 0.93 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Carbon disulfide ND 9.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Carbon tetrachloride ND 0.93 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Chlorobenzene ND 0.93 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Chloroethane ND 1.9 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Chloroform ND 0.93 0.55 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Chloromethane ND 19 1.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Dibromochloromethane ND 1.9 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Dibromomethane ND 0.93 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Dichlorodifluoromethane ND 1.9 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Ethylbenzene ND 0.93 0.19 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Isopropylbenzene ND 0.93 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Methylene Chloride ND 9.3 2.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Methyl-t-Butyl Ether (MTBE) ND 1.9 0.17 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Eurofins Calscience

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4570
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 9.3 3.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Naphthalene
n-Butylbenzene ND 0.93 0.20 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 N-Propylbenzene ND 1.9 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 o-Xylene ND 0.93 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 m,p-Xylene ND 1.9 0.44 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 p-Isopropyltoluene ND 0.93 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 sec-Butylbenzene ND 0.93 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Styrene ND 0.93 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 trans-1,2-Dichloroethene ND 0.93 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 trans-1,3-Dichloropropene ND 1.9 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 tert-Butylbenzene ND 0.93 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Tetrachloroethene 0.30 J 0.93 0.21 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Toluene ND 0.93 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Trichloroethene ND 1.9 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Trichlorofluoromethane ND 9.3 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Vinyl acetate ND 9.3 3.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Vinyl chloride ND 0.93 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 Xylenes, Total ND 1.9 0.56 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:17 1 1,2-Dichloroethane-d4 (Surr) 108 32 - 179 03/03/26 12:03 03/06/26 20:17 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 80 - 120 03/03/26 12:03 03/06/26 20:17 1 Dibromofluoromethane (Surr) 101 58 - 147 03/03/26 12:03 03/06/26 20:17 1 Toluene-d8 (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 20:17 1 Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.98 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 0.98 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1,2,2-Tetrachloroethane ND 2.0 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 9.8 0.46 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1,2-Trichloroethane ND 0.98 0.46 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1-Dichloroethane ND 0.98 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1-Dichloroethene ND 0.98 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,1-Dichloropropene ND 2.0 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2,3-Trichlorobenzene ND 2.0 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2,3-Trichloropropane ND 2.0 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2,4-Trichlorobenzene ND 2.0 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2,4-Trimethylbenzene ND 2.0 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dibromo-3-Chloropropane ND 9.8 3.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dibromoethane ND 0.98 0.20 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dichlorobenzene ND 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dichloroethane ND 0.98 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dichloropropane ND 0.98 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,3,5-Trimethylbenzene ND 2.0 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,3-Dichlorobenzene ND 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,3-Dichloropropane ND 0.98 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,4-Dichlorobenzene ND 0.98 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 4.9 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2,2-Dichloropropane
2-Butanone (MEK) ND 20 4.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 2-Chlorotoluene ND 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 2-Hexanone ND 20 3.0 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 4-Chlorotoluene ND 0.98 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 4-Methyl-2-pentanone (MIBK) ND 20 2.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Acetone 23 20 9.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Benzene 0.77 J 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Bromobenzene ND 0.98 0.21 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Bromochloromethane ND 2.0 0.44 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Bromodichloromethane ND 0.98 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Bromoform ND 4.9 1.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Bromomethane ND 20 6.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 cis-1,2-Dichloroethene ND 0.98 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 cis-1,3-Dichloropropene ND 0.98 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Carbon disulfide ND 9.8 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Carbon tetrachloride ND 0.98 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Chlorobenzene ND 0.98 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Chloroethane ND 2.0 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Chloroform ND 0.98 0.58 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Chloromethane ND 20 1.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Dibromochloromethane ND 2.0 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Dibromomethane ND 0.98 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Dichlorodifluoromethane ND 2.0 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Ethylbenzene ND 0.98 0.20 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Isopropylbenzene ND 0.98 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Methylene Chloride ND 9.8 3.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Methyl-t-Butyl Ether (MTBE) ND 2.0 0.18 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Naphthalene ND 9.8 3.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 n-Butylbenzene ND 0.98 0.21 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 N-Propylbenzene ND 2.0 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 o-Xylene ND 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 m,p-Xylene ND 2.0 0.47 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 p-Isopropyltoluene ND 0.98 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 sec-Butylbenzene ND 0.98 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Styrene ND 0.98 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 trans-1,2-Dichloroethene ND 0.98 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 trans-1,3-Dichloropropene ND 2.0 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 tert-Butylbenzene ND 0.98 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Tetrachloroethene 0.58 J 0.98 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Toluene 0.39 J 0.98 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Trichloroethene ND 2.0 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Trichlorofluoromethane ND 9.8 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Vinyl acetate ND 9.8 3.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Vinyl chloride ND 0.98 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 Xylenes, Total ND 2.0 0.59 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:38 1 1,2-Dichloroethane-d4 (Surr) 109 32 - 179 03/03/26 12:03 03/06/26 20:38 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 20:38 1 Eurofins Calscience

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4572
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
Dibromofluoromethane (Surr) 103 58 - 147 03/03/26 12:03 03/06/26 20:38 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Toluene-d8 (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 20:38 1 Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 1.4 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 1.4 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1,2,2-Tetrachloroethane ND 2.8 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 14 0.65 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1,2-Trichloroethane ND 1.4 0.65 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1-Dichloroethane ND 1.4 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1-Dichloroethene ND 1.4 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,1-Dichloropropene ND 2.8 0.55 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2,3-Trichlorobenzene ND 2.8 0.53 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2,3-Trichloropropane ND 2.8 0.59 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2,4-Trichlorobenzene ND 2.8 0.58 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2,4-Trimethylbenzene ND 2.8 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dibromo-3-Chloropropane ND 14 4.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dibromoethane ND 1.4 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dichlorobenzene ND 1.4 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dichloroethane ND 1.4 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dichloropropane ND 1.4 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,3,5-Trimethylbenzene ND 2.8 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,3-Dichlorobenzene ND 1.4 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,3-Dichloropropane ND 1.4 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,4-Dichlorobenzene ND 1.4 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 2,2-Dichloropropane ND 7.0 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 2-Butanone (MEK) ND 28 6.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 2-Chlorotoluene ND 1.4 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 2-Hexanone ND 28 4.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 4-Chlorotoluene ND 1.4 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 4-Methyl-2-pentanone (MIBK) ND 28 4.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Acetone 26 J 28 14 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Benzene 2.6 1.4 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Bromobenzene ND 1.4 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Bromochloromethane ND 2.8 0.63 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Bromodichloromethane ND 1.4 0.46 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Bromoform ND 7.0 1.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Bromomethane ND 28 9.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 cis-1,2-Dichloroethene ND 1.4 0.47 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 cis-1,3-Dichloropropene ND 1.4 0.49 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Carbon disulfide ND 14 0.56 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Carbon tetrachloride ND 1.4 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Chlorobenzene ND 1.4 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Chloroethane ND 2.8 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Chloroform ND 1.4 0.83 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Chloromethane ND 28 2.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Eurofins Calscience

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4573
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 2.8 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Dibromochloromethane
Dibromomethane ND 1.4 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Dichlorodifluoromethane ND 2.8 0.64 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Ethylbenzene ND 1.4 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Isopropylbenzene ND 1.4 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Methylene Chloride ND 14 4.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Methyl-t-Butyl Ether (MTBE) ND 2.8 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Naphthalene ND 14 5.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 n-Butylbenzene ND 1.4 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 N-Propylbenzene ND 2.8 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 o-Xylene ND 1.4 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 m,p-Xylene ND 2.8 0.67 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 p-Isopropyltoluene ND 1.4 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 sec-Butylbenzene ND 1.4 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Styrene ND 1.4 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 trans-1,2-Dichloroethene ND 1.4 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 trans-1,3-Dichloropropene ND 2.8 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 tert-Butylbenzene ND 1.4 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Tetrachloroethene ND 1.4 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Toluene 1.2 J 1.4 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Trichloroethene ND 2.8 0.54 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Trichlorofluoromethane ND 14 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Vinyl acetate ND 14 5.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Vinyl chloride ND 1.4 0.53 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 Xylenes, Total ND 2.8 0.84 ug/Kg ☼ 03/03/26 12:03 03/06/26 20:59 1 1,2-Dichloroethane-d4 (Surr) 114 32 - 179 03/03/26 12:03 03/06/26 20:59 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 80 - 120 03/03/26 12:03 03/06/26 20:59 1 Dibromofluoromethane (Surr) 106 58 - 147 03/03/26 12:03 03/06/26 20:59 1 Toluene-d8 (Surr) 101 80 - 120 03/03/26 12:03 03/06/26 20:59 1 Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL

0.33 J 0.96 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Benzene
Toluene 0.39 J 0.96 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Xylenes, Total ND 1.9 0.58 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 o-Xylene ND 0.96 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 m,p-Xylene ND 1.9 0.46 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Ethylbenzene ND 0.96 0.20 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Di-isopropyl ether (DIPE) ND 0.96 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Ethanol ND 240 89 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Ethyl-t-butyl ether (ETBE) ND 0.96 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Tert-amyl-methyl ether (TAME) ND 0.96 0.19 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 tert-Butyl alcohol (TBA) 5.7 J 19 2.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Methyl-t-Butyl Ether (MTBE) ND 1.9 0.18 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:20 1 Eurofins Calscience

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4574
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) 1,2-Dichloroethane-d4 (Surr) 113 32 - 179 03/03/26 12:03 03/06/26 21:20 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 21:20 1 Dibromofluoromethane (Surr) 105 58 - 147 03/03/26 12:03 03/06/26 21:20 1 Toluene-d8 (Surr) 101 80 - 120 03/03/26 12:03 03/06/26 21:20 1 Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.89 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Benzene
Toluene ND 0.89 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Xylenes, Total ND 1.8 0.54 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 o-Xylene ND 0.89 0.23 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 m,p-Xylene ND 1.8 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Ethylbenzene ND 0.89 0.18 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Di-isopropyl ether (DIPE) ND 0.89 0.21 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Ethanol ND 220 82 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Ethyl-t-butyl ether (ETBE) ND 0.89 0.21 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Tert-amyl-methyl ether (TAME) ND 0.89 0.17 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 tert-Butyl alcohol (TBA) 2.7 J 18 2.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 Methyl-t-Butyl Ether (MTBE) ND 1.8 0.17 ug/Kg ☼ 03/03/26 12:03 03/06/26 21:41 1 1,2-Dichloroethane-d4 (Surr) 111 32 - 179 03/03/26 12:03 03/06/26 21:41 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 99 80 - 120 03/03/26 12:03 03/06/26 21:41 1 Dibromofluoromethane (Surr) 104 58 - 147 03/03/26 12:03 03/06/26 21:41 1 Toluene-d8 (Surr) 99 80 - 120 03/03/26 12:03 03/06/26 21:41 1 Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 1.1 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 1.1 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1,2,2-Tetrachloroethane ND 2.1 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 11 0.49 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1,2-Trichloroethane ND 1.1 0.49 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1-Dichloroethane ND 1.1 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1-Dichloroethene ND 1.1 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,1-Dichloropropene ND 2.1 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2,3-Trichlorobenzene ND 2.1 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2,3-Trichloropropane ND 2.1 0.44 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2,4-Trichlorobenzene ND 2.1 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2,4-Trimethylbenzene ND 2.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dibromo-3-Chloropropane ND 11 3.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dibromoethane ND 1.1 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dichlorobenzene ND 1.1 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dichloroethane ND 1.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dichloropropane ND 1.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,3,5-Trimethylbenzene ND 2.1 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,3-Dichlorobenzene ND 1.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,3-Dichloropropane ND 1.1 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,4-Dichlorobenzene ND 1.1 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Eurofins Calscience

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4575
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.3 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2,2-Dichloropropane
2-Butanone (MEK) ND 21 4.8 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 2-Chlorotoluene ND 1.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 2-Hexanone ND 21 3.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 4-Chlorotoluene ND 1.1 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 4-Methyl-2-pentanone (MIBK) ND 21 3.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Acetone 17 J 21 10 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Benzene 1.4 1.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Bromobenzene ND 1.1 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Bromochloromethane ND 2.1 0.47 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Bromodichloromethane ND 1.1 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Bromoform ND 5.3 1.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Bromomethane ND 21 6.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 cis-1,2-Dichloroethene ND 1.1 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 cis-1,3-Dichloropropene ND 1.1 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Carbon disulfide ND 11 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Carbon tetrachloride ND 1.1 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Chlorobenzene ND 1.1 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Chloroethane ND 2.1 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Chloroform ND 1.1 0.62 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Chloromethane ND 21 1.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Dibromochloromethane ND 2.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Dibromomethane ND 1.1 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Dichlorodifluoromethane ND 2.1 0.48 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Ethylbenzene ND 1.1 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Isopropylbenzene ND 1.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Methylene Chloride ND 11 3.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Methyl-t-Butyl Ether (MTBE) ND 2.1 0.20 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Naphthalene ND 11 4.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 n-Butylbenzene ND 1.1 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 N-Propylbenzene ND 2.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 o-Xylene ND 1.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 m,p-Xylene ND 2.1 0.50 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 p-Isopropyltoluene ND 1.1 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 sec-Butylbenzene ND 1.1 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Styrene ND 1.1 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 trans-1,2-Dichloroethene ND 1.1 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 trans-1,3-Dichloropropene ND 2.1 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 tert-Butylbenzene ND 1.1 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Tetrachloroethene ND 1.1 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Toluene 0.63 J 1.1 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Trichloroethene ND 2.1 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Trichlorofluoromethane ND 11 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Vinyl acetate ND 11 4.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Vinyl chloride ND 1.1 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 Xylenes, Total ND 2.1 0.63 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:02 1 1,2-Dichloroethane-d4 (Surr) 114 32 - 179 03/03/26 12:03 03/06/26 22:02 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 101 80 - 120 03/03/26 12:03 03/06/26 22:02 1 Eurofins Calscience

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4576
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
Dibromofluoromethane (Surr) 104 58 - 147 03/03/26 12:03 03/06/26 22:02 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Toluene-d8 (Surr) 101 80 - 120 03/03/26 12:03 03/06/26 22:02 1 Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 1.2 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 1.2 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1,2,2-Tetrachloroethane ND 2.3 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 12 0.54 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1,2-Trichloroethane ND 1.2 0.54 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1-Dichloroethane ND 1.2 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1-Dichloroethene ND 1.2 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,1-Dichloropropene ND 2.3 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2,3-Trichlorobenzene ND 2.3 0.44 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2,3-Trichloropropane ND 2.3 0.49 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2,4-Trichlorobenzene ND 2.3 0.48 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2,4-Trimethylbenzene ND 2.3 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dibromo-3-Chloropropane ND 12 3.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dibromoethane ND 1.2 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dichlorobenzene ND 1.2 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dichloroethane ND 1.2 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dichloropropane ND 1.2 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,3,5-Trimethylbenzene ND 2.3 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,3-Dichlorobenzene ND 1.2 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,3-Dichloropropane ND 1.2 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,4-Dichlorobenzene ND 1.2 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 2,2-Dichloropropane ND 5.8 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 2-Butanone (MEK) 7.7 J 23 5.3 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 2-Chlorotoluene ND 1.2 0.29 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 2-Hexanone ND 23 3.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 4-Chlorotoluene ND 1.2 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 4-Methyl-2-pentanone (MIBK) ND 23 3.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Acetone 30 23 11 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Benzene 0.31 J 1.2 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Bromobenzene ND 1.2 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Bromochloromethane ND 2.3 0.52 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Bromodichloromethane ND 1.2 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Bromoform ND 5.8 1.5 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Bromomethane ND 23 7.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 cis-1,2-Dichloroethene ND 1.2 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 cis-1,3-Dichloropropene ND 1.2 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Carbon disulfide ND 12 0.47 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Carbon tetrachloride ND 1.2 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Chlorobenzene ND 1.2 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Chloroethane ND 2.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Chloroform ND 1.2 0.69 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Chloromethane ND 23 1.8 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Eurofins Calscience

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4577
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 2.3 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Dibromochloromethane
Dibromomethane ND 1.2 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Dichlorodifluoromethane ND 2.3 0.53 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Ethylbenzene ND 1.2 0.24 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Isopropylbenzene ND 1.2 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Methylene Chloride ND 12 3.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Methyl-t-Butyl Ether (MTBE) ND 2.3 0.22 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Naphthalene ND 12 4.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 n-Butylbenzene ND 1.2 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 N-Propylbenzene ND 2.3 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 o-Xylene ND 1.2 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 m,p-Xylene ND 2.3 0.55 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 p-Isopropyltoluene ND 1.2 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 sec-Butylbenzene ND 1.2 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Styrene ND 1.2 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 trans-1,2-Dichloroethene ND 1.2 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 trans-1,3-Dichloropropene ND 2.3 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 tert-Butylbenzene ND 1.2 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Tetrachloroethene ND 1.2 0.26 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Toluene ND 1.2 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Trichloroethene ND 2.3 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Trichlorofluoromethane ND 12 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Vinyl acetate ND 12 4.6 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Vinyl chloride ND 1.2 0.44 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 Xylenes, Total ND 2.3 0.70 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:23 1 1,2-Dichloroethane-d4 (Surr) 115 32 - 179 03/03/26 12:03 03/06/26 22:23 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 80 - 120 03/03/26 12:03 03/06/26 22:23 1 Dibromofluoromethane (Surr) 104 58 - 147 03/03/26 12:03 03/06/26 22:23 1 Toluene-d8 (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 22:23 1 Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 1.3 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane
1,1,1-Trichloroethane ND 1.3 0.31 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1,2,2-Tetrachloroethane ND 2.7 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1,2-Trichloro-1,2,2-trifluoroethane ND 13 0.61 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1,2-Trichloroethane ND 1.3 0.62 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1-Dichloroethane ND 1.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1-Dichloroethene ND 1.3 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,1-Dichloropropene ND 2.7 0.52 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2,3-Trichlorobenzene ND 2.7 0.50 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2,3-Trichloropropane ND 2.7 0.56 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2,4-Trichlorobenzene ND 2.7 0.55 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2,4-Trimethylbenzene ND 2.7 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2-Dibromo-3-Chloropropane ND 13 4.4 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2-Dibromoethane ND 1.3 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Eurofins Calscience

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4578
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 1.3 0.33 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2-Dichlorobenzene
1,2-Dichloroethane ND 1.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2-Dichloropropane ND 1.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,3,5-Trimethylbenzene ND 2.7 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,3-Dichlorobenzene ND 1.3 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,3-Dichloropropane ND 1.3 0.39 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,4-Dichlorobenzene ND 1.3 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 2,2-Dichloropropane ND 6.6 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 2-Butanone (MEK) ND 27 6.0 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 2-Chlorotoluene ND 1.3 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 2-Hexanone ND 27 4.1 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 4-Chlorotoluene ND 1.3 0.32 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 4-Methyl-2-pentanone (MIBK) ND 27 3.9 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Acetone 32 27 13 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Benzene 0.53 J 1.3 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Bromobenzene ND 1.3 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Bromochloromethane ND 2.7 0.59 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Bromodichloromethane ND 1.3 0.43 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Bromoform ND 6.6 1.8 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Bromomethane ND 27 8.7 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 cis-1,2-Dichloroethene ND 1.3 0.45 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 cis-1,3-Dichloropropene ND 1.3 0.46 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Carbon disulfide ND 13 0.53 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Carbon tetrachloride ND 1.3 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Chlorobenzene ND 1.3 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Chloroethane ND 2.7 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Chloroform ND 1.3 0.78 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Chloromethane ND 27 2.0 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Dibromochloromethane ND 2.7 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Dibromomethane ND 1.3 0.41 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Dichlorodifluoromethane ND 2.7 0.60 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Ethylbenzene ND 1.3 0.27 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Isopropylbenzene ND 1.3 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Methylene Chloride ND 13 4.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Methyl-t-Butyl Ether (MTBE) ND 2.7 0.25 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Naphthalene ND 13 5.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 n-Butylbenzene ND 1.3 0.28 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 N-Propylbenzene ND 2.7 0.35 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 o-Xylene 0.38 J 1.3 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 m,p-Xylene 1.2 J 2.7 0.63 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 p-Isopropyltoluene ND 1.3 0.38 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 sec-Butylbenzene ND 1.3 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Styrene ND 1.3 0.42 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 trans-1,2-Dichloroethene ND 1.3 0.40 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 trans-1,3-Dichloropropene ND 2.7 0.37 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 tert-Butylbenzene ND 1.3 0.34 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Tetrachloroethene ND 1.3 0.30 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Toluene ND 1.3 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Trichloroethene ND 2.7 0.51 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Eurofins Calscience

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4579
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8260B - Volatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 13 0.36 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Trichlorofluoromethane
Vinyl acetate ND 13 5.2 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Vinyl chloride ND 1.3 0.50 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 Xylenes, Total 1.6 J 2.7 0.80 ug/Kg ☼ 03/03/26 12:03 03/06/26 22:44 1 1,2-Dichloroethane-d4 (Surr) 114 32 - 179 03/03/26 12:03 03/06/26 22:44 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 80 - 120 03/03/26 12:03 03/06/26 22:44 1 Dibromofluoromethane (Surr) 106 58 - 147 03/03/26 12:03 03/06/26 22:44 1 Toluene-d8 (Surr) 101 80 - 120 03/03/26 12:03 03/06/26 22:44 1 Eurofins Calscience

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4580
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.54 0.090 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 1,3-Dichlorobenzene ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 1,4-Dichlorobenzene ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 1-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4,5-Trichlorophenol ND 0.54 0.21 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4,6-Trichlorophenol ND 0.54 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4-Dichlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4-Dimethylphenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4-Dinitrophenol ND 2.1 0.98 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4-Dinitrotoluene ND 0.54 0.087 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,6-Dichlorophenol ND 0.54 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,6-Dinitrotoluene ND 0.54 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Chloronaphthalene ND 0.54 0.093 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Chlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Methylphenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Nitroaniline ND 0.54 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2-Nitrophenol ND *+ 0.54 0.15 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 3,3'-Dichlorobenzidine ND 2.7 0.58 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 3/4-Methylphenol ND 1.1 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 3-Nitroaniline ND 0.54 0.090 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4,6-Dinitro-2-methylphenol ND 2.7 1.0 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Bromophenyl phenyl ether ND 0.54 0.078 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Chloro-3-methylphenol ND 0.54 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Chloroaniline ND 0.54 0.088 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Chlorophenyl phenyl ether ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Nitroaniline ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 4-Nitrophenol ND 0.54 0.34 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Acenaphthene ND 0.54 0.085 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Acenaphthylene ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Aniline ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Anthracene ND 0.54 0.083 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Azobenzene ND 0.54 0.084 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzidine ND F1 5.4 0.62 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzo[a]anthracene ND 0.54 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzo[a]pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzo[b]fluoranthene ND 0.54 0.091 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzo[g,h,i]perylene ND 0.54 0.096 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzo[k]fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzoic acid ND *+ F1 2.7 0.72 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Benzyl alcohol ND 0.54 0.18 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Bis(2-chloroethoxy)methane ND 0.54 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Bis(2-chloroethyl)ether ND 2.7 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 bis(2 chloro-1-methylethyl) ether ND 0.54 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Bis(2-ethylhexyl) phthalate ND 0.54 0.23 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Butyl benzyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Chrysene ND 0.54 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Dibenz(a,h)anthracene ND 0.54 0.085 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Eurofins Calscience

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4581
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Dibenzofuran
Diethyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Dimethyl phthalate ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Di-n-butyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Di-n-octyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Fluorene ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Hexachloro-1,3-butadiene ND 0.54 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Hexachlorobenzene ND 0.54 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Hexachlorocyclopentadiene ND 1.6 0.093 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Hexachloroethane ND 0.54 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Indeno[1,2,3-cd]pyrene ND 0.54 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Isophorone ND 0.54 0.085 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Naphthalene ND 0.54 0.15 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Nitrobenzene ND 2.1 0.15 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 N-Nitrosodimethylamine ND 0.54 0.095 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 N-Nitrosodi-n-propylamine ND 0.54 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 n-Nitrosodiphenylamine(as ND 0.54 0.091 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 diphenylamine)
Pentachlorophenol ND 2.7 2.0 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Phenanthrene ND 0.54 0.077 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Phenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 Pyridine ND *1 0.54 0.25 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:04 1 2,4,6-Tribromophenol (Surr) 74 20 - 135 03/04/26 10:33 03/05/26 16:04 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 62 28 - 110 03/04/26 10:33 03/05/26 16:04 1 2-Fluorophenol (Surr) 64 20 - 135 03/04/26 10:33 03/05/26 16:04 1 Nitrobenzene-d5 (Surr) 76 22 - 116 03/04/26 10:33 03/05/26 16:04 1 p-Terphenyl-d14 (Surr) 61 27 - 118 03/04/26 10:33 03/05/26 16:04 1 Phenol-d6 (Surr) 64 20 - 127 03/04/26 10:33 03/05/26 16:04 1 Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.51 0.087 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 1,3-Dichlorobenzene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 1,4-Dichlorobenzene ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 1-Methylnaphthalene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4,5-Trichlorophenol ND 0.51 0.20 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4,6-Trichlorophenol ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4-Dichlorophenol ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4-Dimethylphenol ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4-Dinitrophenol ND 2.1 0.94 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4-Dinitrotoluene ND 0.51 0.084 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,6-Dichlorophenol ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,6-Dinitrotoluene ND 0.51 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Eurofins Calscience

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4582
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.51 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2-Chloronaphthalene
2-Chlorophenol ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2-Methylnaphthalene ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2-Methylphenol ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2-Nitroaniline ND 0.51 0.094 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2-Nitrophenol ND *+ 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 3,3'-Dichlorobenzidine ND 2.6 0.55 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 3/4-Methylphenol ND 1.0 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 3-Nitroaniline ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4,6-Dinitro-2-methylphenol ND 2.6 0.98 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Bromophenyl phenyl ether ND 0.51 0.075 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Chloro-3-methylphenol ND 0.51 0.095 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Chloroaniline ND 0.51 0.085 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Chlorophenyl phenyl ether ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Nitroaniline ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 4-Nitrophenol ND 0.51 0.32 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Acenaphthene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Acenaphthylene ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Aniline ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Anthracene ND 0.51 0.080 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Azobenzene ND 0.51 0.081 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzidine ND 5.1 0.59 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzo[a]anthracene ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzo[a]pyrene ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzo[b]fluoranthene ND 0.51 0.087 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzo[g,h,i]perylene ND 0.51 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzo[k]fluoranthene ND 0.51 0.097 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzoic acid ND *+ 2.6 0.69 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Benzyl alcohol ND 0.51 0.17 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Bis(2-chloroethoxy)methane ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Bis(2-chloroethyl)ether ND 2.6 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 bis(2 chloro-1-methylethyl) ether ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Bis(2-ethylhexyl) phthalate 0.47 J 0.51 0.22 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Butyl benzyl phthalate ND 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Chrysene ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Dibenz(a,h)anthracene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Dibenzofuran ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Diethyl phthalate ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Dimethyl phthalate ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Di-n-butyl phthalate 0.26 J 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Di-n-octyl phthalate ND 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Fluoranthene ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Fluorene ND 0.51 0.097 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Hexachloro-1,3-butadiene ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Hexachlorobenzene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Hexachlorocyclopentadiene ND 1.5 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Hexachloroethane ND 0.51 0.095 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Indeno[1,2,3-cd]pyrene ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Isophorone ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Naphthalene
Nitrobenzene ND 2.1 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 N-Nitrosodimethylamine ND 0.51 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 N-Nitrosodi-n-propylamine ND 0.51 0.088 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 n-Nitrosodiphenylamine(as ND 0.51 0.088 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 diphenylamine)
Pentachlorophenol ND 2.6 1.9 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Phenanthrene ND 0.51 0.074 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Phenol ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Pyrene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 Pyridine ND *1 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:28 1 2,4,6-Tribromophenol (Surr) 93 20 - 135 03/04/26 10:33 03/05/26 16:28 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 71 28 - 110 03/04/26 10:33 03/05/26 16:28 1 2-Fluorophenol (Surr) 78 20 - 135 03/04/26 10:33 03/05/26 16:28 1 Nitrobenzene-d5 (Surr) 88 22 - 116 03/04/26 10:33 03/05/26 16:28 1 p-Terphenyl-d14 (Surr) 73 27 - 118 03/04/26 10:33 03/05/26 16:28 1 Phenol-d6 (Surr) 78 20 - 127 03/04/26 10:33 03/05/26 16:28 1 Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.51 0.087 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 1,3-Dichlorobenzene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 1,4-Dichlorobenzene ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 1-Methylnaphthalene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4,5-Trichlorophenol ND 0.51 0.20 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4,6-Trichlorophenol ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4-Dichlorophenol ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4-Dimethylphenol ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4-Dinitrophenol ND 2.1 0.94 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4-Dinitrotoluene ND 0.51 0.084 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,6-Dichlorophenol ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,6-Dinitrotoluene ND 0.51 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Chloronaphthalene ND 0.51 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Chlorophenol ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Methylnaphthalene ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Methylphenol ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Nitroaniline ND 0.51 0.094 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2-Nitrophenol ND *+ 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 3,3'-Dichlorobenzidine ND 2.6 0.55 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 3/4-Methylphenol ND 1.0 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 3-Nitroaniline ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 4,6-Dinitro-2-methylphenol ND 2.6 0.98 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 4-Bromophenyl phenyl ether ND 0.51 0.075 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 4-Chloro-3-methylphenol ND 0.51 0.095 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 4-Chloroaniline ND 0.51 0.085 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Eurofins Calscience

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4584
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4-Chlorophenyl phenyl ether
4-Nitroaniline ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 4-Nitrophenol ND 0.51 0.32 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Acenaphthene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Acenaphthylene ND 0.51 0.099 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Aniline ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Anthracene ND 0.51 0.080 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Azobenzene ND 0.51 0.081 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzidine ND 5.1 0.59 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzo[a]anthracene ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzo[a]pyrene ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzo[b]fluoranthene ND 0.51 0.087 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzo[g,h,i]perylene ND 0.51 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzo[k]fluoranthene ND 0.51 0.097 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzoic acid ND *+ 2.6 0.69 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Benzyl alcohol ND 0.51 0.17 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Bis(2-chloroethoxy)methane ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Bis(2-chloroethyl)ether ND 2.6 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 bis(2 chloro-1-methylethyl) ether ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Bis(2-ethylhexyl) phthalate ND 0.51 0.22 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Butyl benzyl phthalate ND 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Chrysene ND 0.51 0.086 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Dibenz(a,h)anthracene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Dibenzofuran ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Diethyl phthalate ND 0.51 0.12 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Dimethyl phthalate ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Di-n-butyl phthalate 0.26 J 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Di-n-octyl phthalate ND 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Fluoranthene ND 0.51 0.098 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Fluorene ND 0.51 0.097 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Hexachloro-1,3-butadiene ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Hexachlorobenzene ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Hexachlorocyclopentadiene ND 1.5 0.089 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Hexachloroethane ND 0.51 0.095 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Indeno[1,2,3-cd]pyrene ND 0.51 0.13 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Isophorone ND 0.51 0.082 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Naphthalene ND 0.51 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Nitrobenzene ND 2.1 0.14 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 N-Nitrosodimethylamine ND 0.51 0.092 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 N-Nitrosodi-n-propylamine ND 0.51 0.088 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 n-Nitrosodiphenylamine(as ND 0.51 0.088 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 diphenylamine)
Pentachlorophenol ND 2.6 1.9 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Phenanthrene ND 0.51 0.074 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Phenol ND 0.51 0.10 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Pyrene ND 0.51 0.11 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 Pyridine ND *1 0.51 0.24 mg/Kg ☼ 03/04/26 10:33 03/05/26 16:53 1 2,4,6-Tribromophenol (Surr) 90 20 - 135 03/04/26 10:33 03/05/26 16:53 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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4585
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
2-Fluorobiphenyl (Surr) 70 28 - 110 03/04/26 10:33 03/05/26 16:53 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 80 20 - 135 03/04/26 10:33 03/05/26 16:53 1 Nitrobenzene-d5 (Surr) 91 22 - 116 03/04/26 10:33 03/05/26 16:53 1 p-Terphenyl-d14 (Surr) 72 27 - 118 03/04/26 10:33 03/05/26 16:53 1 Phenol-d6 (Surr) 80 20 - 127 03/04/26 10:33 03/05/26 16:53 1 Client Sample ID: EKI-SB-1-5.5 Lab Sample ID: 570-269712-4 Date Collected: 02/28/26 15:05 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.50 0.084 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 1,3-Dichlorobenzene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 1,4-Dichlorobenzene ND 0.50 0.095 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 1-Methylnaphthalene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4,5-Trichlorophenol ND 0.50 0.19 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4,6-Trichlorophenol ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4-Dichlorophenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4-Dimethylphenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4-Dinitrophenol ND 2.0 0.91 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4-Dinitrotoluene ND 0.50 0.081 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,6-Dichlorophenol ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,6-Dinitrotoluene ND 0.50 0.085 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Chloronaphthalene ND 0.50 0.086 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Chlorophenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Methylnaphthalene ND 0.50 0.099 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Methylphenol ND 0.50 0.096 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Nitroaniline ND 0.50 0.091 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2-Nitrophenol ND *+ 0.50 0.14 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 3,3'-Dichlorobenzidine ND 2.5 0.53 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 3/4-Methylphenol ND 0.99 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 3-Nitroaniline ND 0.50 0.083 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4,6-Dinitro-2-methylphenol ND 2.5 0.94 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Bromophenyl phenyl ether ND 0.50 0.073 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Chloro-3-methylphenol ND 0.50 0.092 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Chloroaniline ND 0.50 0.082 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Chlorophenyl phenyl ether ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Nitroaniline ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 4-Nitrophenol ND 0.50 0.31 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Acenaphthene ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Acenaphthylene ND 0.50 0.096 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Aniline ND 0.50 0.095 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Anthracene ND 0.50 0.077 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Azobenzene ND 0.50 0.078 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzidine ND 5.0 0.57 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzo[a]anthracene ND 0.50 0.083 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzo[a]pyrene ND 0.50 0.099 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzo[b]fluoranthene ND 0.50 0.084 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzo[g,h,i]perylene ND 0.50 0.089 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Eurofins Calscience

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4586
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-1-5.5 Lab Sample ID: 570-269712-4 Date Collected: 02/28/26 15:05 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Benzo[k]fluoranthene
Benzoic acid ND *+ 2.5 0.67 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Benzyl alcohol ND 0.50 0.17 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Bis(2-chloroethoxy)methane ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Bis(2-chloroethyl)ether ND 2.5 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 bis(2 chloro-1-methylethyl) ether ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Bis(2-ethylhexyl) phthalate 0.45 J 0.50 0.22 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Butyl benzyl phthalate ND 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Chrysene ND 0.50 0.083 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Dibenz(a,h)anthracene ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Dibenzofuran ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Diethyl phthalate ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Dimethyl phthalate ND 0.50 0.098 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Di-n-butyl phthalate 0.26 J 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Di-n-octyl phthalate ND 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Fluoranthene ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Fluorene ND 0.50 0.093 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Hexachloro-1,3-butadiene ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Hexachlorobenzene ND 0.50 0.080 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Hexachlorocyclopentadiene ND 1.5 0.086 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Hexachloroethane ND 0.50 0.091 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Indeno[1,2,3-cd]pyrene ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Isophorone ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Naphthalene ND 0.50 0.14 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Nitrobenzene ND 2.0 0.14 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 N-Nitrosodimethylamine ND 0.50 0.088 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 N-Nitrosodi-n-propylamine ND 0.50 0.085 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 n-Nitrosodiphenylamine(as ND 0.50 0.085 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 diphenylamine)
Pentachlorophenol ND 2.5 1.8 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Phenanthrene ND 0.50 0.072 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Phenol ND 0.50 0.097 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Pyrene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 Pyridine ND *1 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:17 1 2,4,6-Tribromophenol (Surr) 88 20 - 135 03/04/26 10:33 03/05/26 17:17 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 70 28 - 110 03/04/26 10:33 03/05/26 17:17 1 2-Fluorophenol (Surr) 75 20 - 135 03/04/26 10:33 03/05/26 17:17 1 Nitrobenzene-d5 (Surr) 87 22 - 116 03/04/26 10:33 03/05/26 17:17 1 p-Terphenyl-d14 (Surr) 69 27 - 118 03/04/26 10:33 03/05/26 17:17 1 Phenol-d6 (Surr) 77 20 - 127 03/04/26 10:33 03/05/26 17:17 1 Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Date Collected: 03/01/26 10:59 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:41 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.50 0.084 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 1,3-Dichlorobenzene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Eurofins Calscience

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4587
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Date Collected: 03/01/26 10:59 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.50 0.095 mg/Kg 03/04/26 10:33 03/05/26 17:41 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,4-Dichlorobenzene
1-Methylnaphthalene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4,5-Trichlorophenol ND 0.50 0.19 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4,6-Trichlorophenol ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4-Dichlorophenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4-Dimethylphenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4-Dinitrophenol ND 2.0 0.90 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4-Dinitrotoluene ND 0.50 0.081 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,6-Dichlorophenol ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,6-Dinitrotoluene ND 0.50 0.085 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Chloronaphthalene ND 0.50 0.086 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Chlorophenol ND 0.50 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Methylnaphthalene ND 0.50 0.099 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Methylphenol ND 0.50 0.096 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Nitroaniline ND 0.50 0.091 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2-Nitrophenol ND *+ 0.50 0.14 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 3,3'-Dichlorobenzidine ND 2.5 0.53 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 3/4-Methylphenol ND 0.99 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 3-Nitroaniline ND 0.50 0.083 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4,6-Dinitro-2-methylphenol ND 2.5 0.94 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Bromophenyl phenyl ether ND 0.50 0.073 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Chloro-3-methylphenol ND 0.50 0.092 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Chloroaniline ND 0.50 0.082 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Chlorophenyl phenyl ether ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Nitroaniline ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 4-Nitrophenol ND 0.50 0.31 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Acenaphthene ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Acenaphthylene ND 0.50 0.095 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Aniline ND 0.50 0.095 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Anthracene ND 0.50 0.077 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Azobenzene ND 0.50 0.078 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzidine ND 5.0 0.57 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzo[a]anthracene ND 0.50 0.083 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzo[a]pyrene ND 0.50 0.099 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzo[b]fluoranthene ND 0.50 0.084 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzo[g,h,i]perylene ND 0.50 0.088 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzo[k]fluoranthene ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzoic acid ND *+ 2.5 0.67 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Benzyl alcohol ND 0.50 0.17 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Bis(2-chloroethoxy)methane ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Bis(2-chloroethyl)ether ND 2.5 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 bis(2 chloro-1-methylethyl) ether ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Bis(2-ethylhexyl) phthalate ND 0.50 0.22 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Butyl benzyl phthalate ND 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Chrysene ND 0.50 0.082 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Dibenz(a,h)anthracene ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Dibenzofuran ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Diethyl phthalate ND 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Dimethyl phthalate ND 0.50 0.097 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Eurofins Calscience

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4588
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Date Collected: 03/01/26 10:59 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL

0.27 J 0.50 0.11 mg/Kg 03/04/26 10:33 03/05/26 17:41 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Di-n-butyl phthalate
Di-n-octyl phthalate ND 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Fluoranthene ND 0.50 0.094 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Fluorene ND 0.50 0.093 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Hexachloro-1,3-butadiene ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Hexachlorobenzene ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Hexachlorocyclopentadiene ND 1.5 0.086 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Hexachloroethane ND 0.50 0.091 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Indeno[1,2,3-cd]pyrene ND 0.50 0.12 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Isophorone ND 0.50 0.079 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Naphthalene ND 0.50 0.14 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Nitrobenzene ND 2.0 0.13 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 N-Nitrosodimethylamine ND 0.50 0.088 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 N-Nitrosodi-n-propylamine ND 0.50 0.085 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 n-Nitrosodiphenylamine(as ND 0.50 0.084 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 diphenylamine)
Pentachlorophenol ND 2.5 1.8 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Phenanthrene ND 0.50 0.072 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Phenol ND 0.50 0.096 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Pyrene ND 0.50 0.10 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 Pyridine ND *1 0.50 0.23 mg/Kg 03/04/26 10:33 03/05/26 17:41 1 2,4,6-Tribromophenol (Surr) 81 20 - 135 03/04/26 10:33 03/05/26 17:41 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 71 28 - 110 03/04/26 10:33 03/05/26 17:41 1 2-Fluorophenol (Surr) 72 20 - 135 03/04/26 10:33 03/05/26 17:41 1 Nitrobenzene-d5 (Surr) 91 22 - 116 03/04/26 10:33 03/05/26 17:41 1 p-Terphenyl-d14 (Surr) 71 27 - 118 03/04/26 10:33 03/05/26 17:41 1 Phenol-d6 (Surr) 76 20 - 127 03/04/26 10:33 03/05/26 17:41 1 Client Sample ID: EKI-SB-3-5.5 Lab Sample ID: 570-269712-6 Date Collected: 03/01/26 11:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:05 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 1,3-Dichlorobenzene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 1,4-Dichlorobenzene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 1-Methylnaphthalene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4,5-Trichlorophenol ND 0.49 0.19 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4,6-Trichlorophenol ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4-Dichlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4-Dimethylphenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4-Dinitrophenol ND 2.0 0.90 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4-Dinitrotoluene ND 0.49 0.080 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,6-Dichlorophenol ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,6-Dinitrotoluene ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2-Chloronaphthalene ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2-Chlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2-Methylnaphthalene ND 0.49 0.099 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Eurofins Calscience

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15 ATTACHMENT 6 - 3616
4589
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-3-5.5 Lab Sample ID: 570-269712-6 Date Collected: 03/01/26 11:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:05 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2-Methylphenol
2-Nitroaniline ND 0.49 0.090 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2-Nitrophenol ND *+ 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 3,3'-Dichlorobenzidine ND 2.5 0.53 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 3/4-Methylphenol ND 0.99 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 3-Nitroaniline ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4,6-Dinitro-2-methylphenol ND 2.5 0.93 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Bromophenyl phenyl ether ND 0.49 0.072 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Chloro-3-methylphenol ND 0.49 0.092 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Chloroaniline ND 0.49 0.081 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Chlorophenyl phenyl ether ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Nitroaniline ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 4-Nitrophenol ND 0.49 0.31 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Acenaphthene ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Acenaphthylene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Aniline ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Anthracene ND 0.49 0.077 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Azobenzene ND 0.49 0.077 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzidine ND 4.9 0.57 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzo[a]anthracene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzo[a]pyrene ND 0.49 0.098 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzo[b]fluoranthene ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzo[g,h,i]perylene ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzo[k]fluoranthene ND 0.49 0.093 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzoic acid ND *+ 2.5 0.66 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Benzyl alcohol ND 0.49 0.16 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Bis(2-chloroethoxy)methane ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Bis(2-chloroethyl)ether ND 2.5 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 bis(2 chloro-1-methylethyl) ether ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Bis(2-ethylhexyl) phthalate ND 0.49 0.22 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Butyl benzyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Chrysene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Dibenz(a,h)anthracene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Dibenzofuran ND 0.49 0.093 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Diethyl phthalate ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Dimethyl phthalate ND 0.49 0.097 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Di-n-butyl phthalate 0.27 J 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Di-n-octyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Fluoranthene ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Fluorene ND 0.49 0.093 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Hexachloro-1,3-butadiene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Hexachlorobenzene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Hexachlorocyclopentadiene ND 1.5 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Hexachloroethane ND 0.49 0.091 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Indeno[1,2,3-cd]pyrene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Isophorone ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Naphthalene ND 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Nitrobenzene ND 2.0 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 N-Nitrosodimethylamine ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Eurofins Calscience

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4590
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-3-5.5 Lab Sample ID: 570-269712-6 Date Collected: 03/01/26 11:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:05 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac N-Nitrosodi-n-propylamine
n-Nitrosodiphenylamine(as ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 diphenylamine)
Pentachlorophenol ND 2.5 1.8 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Phenanthrene ND 0.49 0.071 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Phenol ND 0.49 0.096 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Pyrene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 Pyridine ND *1 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:05 1 2,4,6-Tribromophenol (Surr) 99 20 - 135 03/04/26 10:33 03/05/26 18:05 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 82 28 - 110 03/04/26 10:33 03/05/26 18:05 1 2-Fluorophenol (Surr) 93 20 - 135 03/04/26 10:33 03/05/26 18:05 1 Nitrobenzene-d5 (Surr) 103 22 - 116 03/04/26 10:33 03/05/26 18:05 1 p-Terphenyl-d14 (Surr) 82 27 - 118 03/04/26 10:33 03/05/26 18:05 1 Phenol-d6 (Surr) 94 20 - 127 03/04/26 10:33 03/05/26 18:05 1 Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:30 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 1,3-Dichlorobenzene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 1,4-Dichlorobenzene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 1-Methylnaphthalene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4,5-Trichlorophenol ND 0.49 0.19 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4,6-Trichlorophenol ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4-Dichlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4-Dimethylphenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4-Dinitrophenol ND 2.0 0.90 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4-Dinitrotoluene ND 0.49 0.080 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,6-Dichlorophenol ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,6-Dinitrotoluene ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Chloronaphthalene ND 0.49 0.086 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Chlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Methylnaphthalene ND 0.49 0.099 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Methylphenol ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Nitroaniline ND 0.49 0.090 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2-Nitrophenol ND *+ 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 3,3'-Dichlorobenzidine ND 2.5 0.53 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 3/4-Methylphenol ND 0.99 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 3-Nitroaniline ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4,6-Dinitro-2-methylphenol ND 2.5 0.94 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Bromophenyl phenyl ether ND 0.49 0.072 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Chloro-3-methylphenol ND 0.49 0.092 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Chloroaniline ND 0.49 0.081 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Chlorophenyl phenyl ether ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Nitroaniline ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 4-Nitrophenol ND 0.49 0.31 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Eurofins Calscience

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4591
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:30 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Acenaphthene
Acenaphthylene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Aniline ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Anthracene ND 0.49 0.077 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Azobenzene ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzidine ND 4.9 0.57 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzo[a]anthracene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzo[a]pyrene ND 0.49 0.098 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzo[b]fluoranthene ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzo[g,h,i]perylene ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzo[k]fluoranthene ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzoic acid ND *+ 2.5 0.67 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Benzyl alcohol ND 0.49 0.17 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Bis(2-chloroethoxy)methane ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Bis(2-chloroethyl)ether ND 2.5 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 bis(2 chloro-1-methylethyl) ether ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Bis(2-ethylhexyl) phthalate ND 0.49 0.22 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Butyl benzyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Chrysene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Dibenz(a,h)anthracene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Dibenzofuran ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Diethyl phthalate ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Dimethyl phthalate ND 0.49 0.097 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Di-n-butyl phthalate 0.26 J 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Di-n-octyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Fluoranthene ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Fluorene ND 0.49 0.093 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Hexachloro-1,3-butadiene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Hexachlorobenzene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Hexachlorocyclopentadiene ND 1.5 0.086 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Hexachloroethane ND 0.49 0.091 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Indeno[1,2,3-cd]pyrene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Isophorone ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Naphthalene ND 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Nitrobenzene ND 2.0 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 N-Nitrosodimethylamine ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 N-Nitrosodi-n-propylamine ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 n-Nitrosodiphenylamine(as ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 diphenylamine)
Pentachlorophenol ND 2.5 1.8 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Phenanthrene ND 0.49 0.071 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Phenol ND 0.49 0.096 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Pyrene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 Pyridine ND *1 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:30 1 2,4,6-Tribromophenol (Surr) 93 20 - 135 03/04/26 10:33 03/05/26 18:30 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 74 28 - 110 03/04/26 10:33 03/05/26 18:30 1 2-Fluorophenol (Surr) 83 20 - 135 03/04/26 10:33 03/05/26 18:30 1 Nitrobenzene-d5 (Surr) 94 22 - 116 03/04/26 10:33 03/05/26 18:30 1 Eurofins Calscience

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4592
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
p-Terphenyl-d14 (Surr) 75 27 - 118 03/04/26 10:33 03/05/26 18:30 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Phenol-d6 (Surr) 82 20 - 127 03/04/26 10:33 03/05/26 18:30 1 Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Date Collected: 02/28/26 09:55 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:54 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 1,3-Dichlorobenzene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 1,4-Dichlorobenzene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 1-Methylnaphthalene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4,5-Trichlorophenol ND 0.49 0.19 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4,6-Trichlorophenol ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4-Dichlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4-Dimethylphenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4-Dinitrophenol ND 2.0 0.90 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4-Dinitrotoluene ND 0.49 0.080 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,6-Dichlorophenol ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,6-Dinitrotoluene ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Chloronaphthalene ND 0.49 0.086 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Chlorophenol ND 0.49 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Methylnaphthalene ND 0.49 0.099 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Methylphenol ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Nitroaniline ND 0.49 0.090 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2-Nitrophenol ND *+ 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 3,3'-Dichlorobenzidine ND 2.5 0.53 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 3/4-Methylphenol ND 0.99 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 3-Nitroaniline ND 0.49 0.083 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4,6-Dinitro-2-methylphenol ND 2.5 0.94 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Bromophenyl phenyl ether ND 0.49 0.072 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Chloro-3-methylphenol ND 0.49 0.092 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Chloroaniline ND 0.49 0.081 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Chlorophenyl phenyl ether ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Nitroaniline ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 4-Nitrophenol ND 0.49 0.31 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Acenaphthene ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Acenaphthylene ND 0.49 0.095 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Aniline ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Anthracene ND 0.49 0.077 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Azobenzene ND 0.49 0.078 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzidine ND 4.9 0.57 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzo[a]anthracene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzo[a]pyrene ND 0.49 0.098 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzo[b]fluoranthene ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzo[g,h,i]perylene ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzo[k]fluoranthene ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzoic acid ND *+ 2.5 0.67 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Benzyl alcohol ND 0.49 0.17 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Eurofins Calscience

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4593
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Date Collected: 02/28/26 09:55 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:54 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Bis(2-chloroethoxy)methane
Bis(2-chloroethyl)ether ND 2.5 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 bis(2 chloro-1-methylethyl) ether ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Bis(2-ethylhexyl) phthalate ND 0.49 0.22 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Butyl benzyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Chrysene ND 0.49 0.082 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Dibenz(a,h)anthracene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Dibenzofuran ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Diethyl phthalate ND 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Dimethyl phthalate ND 0.49 0.097 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Di-n-butyl phthalate 0.27 J 0.49 0.11 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Di-n-octyl phthalate ND 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Fluoranthene ND 0.49 0.094 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Fluorene ND 0.49 0.093 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Hexachloro-1,3-butadiene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Hexachlorobenzene ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Hexachlorocyclopentadiene ND 1.5 0.086 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Hexachloroethane ND 0.49 0.091 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Indeno[1,2,3-cd]pyrene ND 0.49 0.12 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Isophorone ND 0.49 0.079 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Naphthalene ND 0.49 0.14 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Nitrobenzene ND 2.0 0.13 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 N-Nitrosodimethylamine ND 0.49 0.088 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 N-Nitrosodi-n-propylamine ND 0.49 0.085 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 n-Nitrosodiphenylamine(as ND 0.49 0.084 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 diphenylamine)
Pentachlorophenol ND 2.5 1.8 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Phenanthrene ND 0.49 0.071 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Phenol ND 0.49 0.096 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Pyrene ND 0.49 0.10 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 Pyridine ND *1 0.49 0.23 mg/Kg 03/04/26 10:33 03/05/26 18:54 1 2,4,6-Tribromophenol (Surr) 81 20 - 135 03/04/26 10:33 03/05/26 18:54 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 68 28 - 110 03/04/26 10:33 03/05/26 18:54 1 2-Fluorophenol (Surr) 71 20 - 135 03/04/26 10:33 03/05/26 18:54 1 Nitrobenzene-d5 (Surr) 86 22 - 116 03/04/26 10:33 03/05/26 18:54 1 p-Terphenyl-d14 (Surr) 68 27 - 118 03/04/26 10:33 03/05/26 18:54 1 Phenol-d6 (Surr) 72 20 - 127 03/04/26 10:33 03/05/26 18:54 1 Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.54 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 1,3-Dichlorobenzene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 1,4-Dichlorobenzene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 1-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,4,5-Trichlorophenol ND 0.54 0.21 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Eurofins Calscience

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4594
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2,4,6-Trichlorophenol
2,4-Dichlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,4-Dimethylphenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,4-Dinitrophenol ND 2.1 0.98 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,4-Dinitrotoluene ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,6-Dichlorophenol ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,6-Dinitrotoluene ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Chloronaphthalene ND 0.54 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Chlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Methylphenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Nitroaniline ND 0.54 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2-Nitrophenol ND *+ 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 3,3'-Dichlorobenzidine ND 2.7 0.58 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 3/4-Methylphenol ND 1.1 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 3-Nitroaniline ND 0.54 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4,6-Dinitro-2-methylphenol ND 2.7 1.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Bromophenyl phenyl ether ND 0.54 0.078 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Chloro-3-methylphenol ND 0.54 0.099 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Chloroaniline ND 0.54 0.088 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Chlorophenyl phenyl ether ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Nitroaniline ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 4-Nitrophenol ND 0.54 0.34 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Acenaphthene ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Acenaphthylene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Aniline ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Anthracene ND 0.54 0.083 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Azobenzene ND 0.54 0.084 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzidine ND 5.4 0.62 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzo[a]anthracene ND 0.54 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzo[a]pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzo[b]fluoranthene ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzo[g,h,i]perylene ND 0.54 0.096 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzo[k]fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzoic acid ND *+ 2.7 0.72 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Benzyl alcohol ND 0.54 0.18 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Bis(2-chloroethoxy)methane ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Bis(2-chloroethyl)ether ND 2.7 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 bis(2 chloro-1-methylethyl) ether ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Bis(2-ethylhexyl) phthalate 0.61 0.54 0.23 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Butyl benzyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Chrysene ND 0.54 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Dibenz(a,h)anthracene ND 0.54 0.086 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Dibenzofuran ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Diethyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Dimethyl phthalate ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Di-n-butyl phthalate 0.28 J 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Di-n-octyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Eurofins Calscience

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4595
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Fluorene
Hexachloro-1,3-butadiene ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Hexachlorobenzene ND 0.54 0.086 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Hexachlorocyclopentadiene ND 1.6 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Hexachloroethane ND 0.54 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Indeno[1,2,3-cd]pyrene ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Isophorone ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Naphthalene ND 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Nitrobenzene ND 2.1 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 N-Nitrosodimethylamine ND 0.54 0.095 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 N-Nitrosodi-n-propylamine ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 n-Nitrosodiphenylamine(as ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 diphenylamine)
Pentachlorophenol ND 2.7 2.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Phenanthrene ND 0.54 0.077 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Phenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 Pyridine ND *1 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 19:18 1 2,4,6-Tribromophenol (Surr) 75 20 - 135 03/04/26 17:34 03/05/26 19:18 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 70 28 - 110 03/04/26 17:34 03/05/26 19:18 1 2-Fluorophenol (Surr) 61 20 - 135 03/04/26 17:34 03/05/26 19:18 1 Nitrobenzene-d5 (Surr) 73 22 - 116 03/04/26 17:34 03/05/26 19:18 1 p-Terphenyl-d14 (Surr) 69 27 - 118 03/04/26 17:34 03/05/26 19:18 1 Phenol-d6 (Surr) 58 20 - 127 03/04/26 17:34 03/05/26 19:18 1 Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.59 0.099 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 1,3-Dichlorobenzene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 1,4-Dichlorobenzene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 1-Methylnaphthalene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4,5-Trichlorophenol ND 0.59 0.23 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4,6-Trichlorophenol ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4-Dichlorophenol ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4-Dimethylphenol ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4-Dinitrophenol ND 2.4 1.1 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4-Dinitrotoluene ND 0.59 0.096 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,6-Dichlorophenol ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,6-Dinitrotoluene ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Chloronaphthalene ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Chlorophenol ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Methylnaphthalene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Methylphenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Nitroaniline ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2-Nitrophenol ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Eurofins Calscience

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4596
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 2.9 0.63 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 3,3'-Dichlorobenzidine
3/4-Methylphenol ND 1.2 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 3-Nitroaniline ND 0.59 0.098 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4,6-Dinitro-2-methylphenol ND 2.9 1.1 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Bromophenyl phenyl ether ND 0.59 0.086 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Chloro-3-methylphenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Chloroaniline ND 0.59 0.097 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Chlorophenyl phenyl ether ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Nitroaniline ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 4-Nitrophenol ND 0.59 0.37 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Acenaphthene ND 0.59 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Acenaphthylene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Aniline ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Anthracene ND 0.59 0.091 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Azobenzene ND 0.59 0.092 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzidine ND 5.9 0.68 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzo[a]anthracene ND 0.59 0.098 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzo[a]pyrene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzo[b]fluoranthene ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzo[g,h,i]perylene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzo[k]fluoranthene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzoic acid ND 2.9 0.79 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Benzyl alcohol ND 0.59 0.20 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Bis(2-chloroethoxy)methane ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Bis(2-chloroethyl)ether ND 2.9 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 bis(2 chloro-1-methylethyl) ether ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Bis(2-ethylhexyl) phthalate ND 0.59 0.26 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Butyl benzyl phthalate ND 0.59 0.28 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Chrysene ND 0.59 0.098 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Dibenz(a,h)anthracene ND 0.59 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Dibenzofuran ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Diethyl phthalate ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Dimethyl phthalate ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Di-n-butyl phthalate ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Di-n-octyl phthalate ND 0.59 0.27 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Fluoranthene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Fluorene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Hexachloro-1,3-butadiene ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Hexachlorobenzene ND 0.59 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Hexachlorocyclopentadiene ND 1.8 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Hexachloroethane ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Indeno[1,2,3-cd]pyrene ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Isophorone ND 0.59 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Naphthalene ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Nitrobenzene ND 2.4 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 N-Nitrosodimethylamine ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 N-Nitrosodi-n-propylamine ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 n-Nitrosodiphenylamine(as ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 diphenylamine)
Pentachlorophenol ND 2.9 2.2 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Eurofins Calscience

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4597
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.59 0.085 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Phenanthrene
Phenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Pyrene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 Pyridine ND 0.59 0.28 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:26 1 2,4,6-Tribromophenol (Surr) 69 20 - 135 03/13/26 10:04 03/16/26 16:26 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 86 28 - 110 03/13/26 10:04 03/16/26 16:26 1 2-Fluorophenol (Surr) 76 20 - 135 03/13/26 10:04 03/16/26 16:26 1 Nitrobenzene-d5 (Surr) 84 22 - 116 03/13/26 10:04 03/16/26 16:26 1 p-Terphenyl-d14 (Surr) 92 27 - 118 03/13/26 10:04 03/16/26 16:26 1 Phenol-d6 (Surr) 74 20 - 127 03/13/26 10:04 03/16/26 16:26 1 Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Date Collected: 02/28/26 15:12 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.61 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 1,3-Dichlorobenzene ND 0.61 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 1,4-Dichlorobenzene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 1-Methylnaphthalene ND 0.61 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4,5-Trichlorophenol ND 0.61 0.24 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4,6-Trichlorophenol ND 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4-Dichlorophenol ND 0.61 0.16 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4-Dimethylphenol ND 0.61 0.16 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4-Dinitrophenol ND 2.5 1.1 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4-Dinitrotoluene ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,6-Dichlorophenol ND 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,6-Dinitrotoluene ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Chloronaphthalene ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Chlorophenol ND 0.61 0.16 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Methylnaphthalene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Methylphenol ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Nitroaniline ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2-Nitrophenol ND *+ 0.61 0.17 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 3,3'-Dichlorobenzidine ND 3.1 0.66 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 3/4-Methylphenol ND 1.2 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 3-Nitroaniline ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4,6-Dinitro-2-methylphenol ND 3.1 1.2 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Bromophenyl phenyl ether ND 0.61 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Chloro-3-methylphenol ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Chloroaniline ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Chlorophenyl phenyl ether ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Nitroaniline ND 0.61 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 4-Nitrophenol ND 0.61 0.39 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Acenaphthene ND 0.61 0.097 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Acenaphthylene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Aniline ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Anthracene ND 0.61 0.095 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Eurofins Calscience

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4598
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Date Collected: 02/28/26 15:12 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.61 0.096 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Azobenzene
Benzidine ND 6.1 0.71 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzo[a]anthracene ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzo[a]pyrene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzo[b]fluoranthene ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzo[g,h,i]perylene ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzo[k]fluoranthene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzoic acid ND *+ 3.1 0.83 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Benzyl alcohol ND 0.61 0.20 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Bis(2-chloroethoxy)methane ND 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Bis(2-chloroethyl)ether ND 3.1 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 bis(2 chloro-1-methylethyl) ether ND 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Bis(2-ethylhexyl) phthalate ND 0.61 0.27 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Butyl benzyl phthalate ND 0.61 0.29 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Chrysene ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Dibenz(a,h)anthracene ND 0.61 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Dibenzofuran ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Diethyl phthalate ND 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Dimethyl phthalate ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Di-n-butyl phthalate 0.31 J 0.61 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Di-n-octyl phthalate ND 0.61 0.28 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Fluoranthene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Fluorene ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Hexachloro-1,3-butadiene ND 0.61 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Hexachlorobenzene ND 0.61 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Hexachlorocyclopentadiene ND 1.8 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Hexachloroethane ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Indeno[1,2,3-cd]pyrene ND 0.61 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Isophorone ND 0.61 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Naphthalene ND 0.61 0.17 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Nitrobenzene ND 2.5 0.17 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 N-Nitrosodimethylamine ND 0.61 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 N-Nitrosodi-n-propylamine ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 n-Nitrosodiphenylamine(as ND 0.61 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 diphenylamine)
Pentachlorophenol ND 3.1 2.3 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Phenanthrene ND 0.61 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Phenol ND 0.61 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Pyrene ND 0.61 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 Pyridine ND *1 0.61 0.29 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:06 1 2,4,6-Tribromophenol (Surr) 84 20 - 135 03/04/26 17:34 03/05/26 20:06 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 69 28 - 110 03/04/26 17:34 03/05/26 20:06 1 2-Fluorophenol (Surr) 69 20 - 135 03/04/26 17:34 03/05/26 20:06 1 Nitrobenzene-d5 (Surr) 88 22 - 116 03/04/26 17:34 03/05/26 20:06 1 p-Terphenyl-d14 (Surr) 67 27 - 118 03/04/26 17:34 03/05/26 20:06 1 Phenol-d6 (Surr) 74 20 - 127 03/04/26 17:34 03/05/26 20:06 1 Eurofins Calscience

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4599
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) Client Sample ID: EKI-SB-1-15.0 Lab Sample ID: 570-269712-15 Date Collected: 02/28/26 15:20 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.54 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 1,3-Dichlorobenzene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 1,4-Dichlorobenzene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 1-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4,5-Trichlorophenol ND 0.54 0.21 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4,6-Trichlorophenol ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4-Dichlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4-Dimethylphenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4-Dinitrophenol ND 2.1 0.98 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4-Dinitrotoluene ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,6-Dichlorophenol ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,6-Dinitrotoluene ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Chloronaphthalene ND 0.54 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Chlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Methylphenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Nitroaniline ND 0.54 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2-Nitrophenol ND *+ 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 3,3'-Dichlorobenzidine ND 2.7 0.58 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 3/4-Methylphenol 0.11 J 1.1 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 3-Nitroaniline ND 0.54 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4,6-Dinitro-2-methylphenol ND 2.7 1.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Bromophenyl phenyl ether ND 0.54 0.078 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Chloro-3-methylphenol ND 0.54 0.099 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Chloroaniline ND 0.54 0.088 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Chlorophenyl phenyl ether ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Nitroaniline ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 4-Nitrophenol ND 0.54 0.34 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Acenaphthene ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Acenaphthylene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Aniline ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Anthracene ND 0.54 0.083 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Azobenzene ND 0.54 0.084 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzidine ND 5.4 0.62 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzo[a]anthracene ND 0.54 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzo[a]pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzo[b]fluoranthene ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzo[g,h,i]perylene ND 0.54 0.096 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzo[k]fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzoic acid ND *+ 2.7 0.72 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Benzyl alcohol ND 0.54 0.18 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Bis(2-chloroethoxy)methane ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Bis(2-chloroethyl)ether ND 2.7 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 bis(2 chloro-1-methylethyl) ether ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Bis(2-ethylhexyl) phthalate ND 0.54 0.23 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Butyl benzyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Chrysene ND 0.54 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Dibenz(a,h)anthracene ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-1-15.0 Lab Sample ID: 570-269712-15 Date Collected: 02/28/26 15:20 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Dibenzofuran
Diethyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Dimethyl phthalate ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Di-n-butyl phthalate 0.29 J 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Di-n-octyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Fluorene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Hexachloro-1,3-butadiene ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Hexachlorobenzene ND 0.54 0.086 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Hexachlorocyclopentadiene ND 1.6 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Hexachloroethane ND 0.54 0.098 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Indeno[1,2,3-cd]pyrene ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Isophorone ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Naphthalene ND 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Nitrobenzene ND 2.1 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 N-Nitrosodimethylamine ND 0.54 0.095 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 N-Nitrosodi-n-propylamine ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 n-Nitrosodiphenylamine(as ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 diphenylamine)
Pentachlorophenol ND 2.7 2.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Phenanthrene ND 0.54 0.077 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Phenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 Pyridine ND *1 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 20:31 1 2,4,6-Tribromophenol (Surr) 31 20 - 135 03/04/26 17:34 03/05/26 20:31 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 53 28 - 110 03/04/26 17:34 03/05/26 20:31 1 2-Fluorophenol (Surr) 31 20 - 135 03/04/26 17:34 03/05/26 20:31 1 Nitrobenzene-d5 (Surr) 63 22 - 116 03/04/26 17:34 03/05/26 20:31 1 p-Terphenyl-d14 (Surr) 62 27 - 118 03/04/26 17:34 03/05/26 20:31 1 Phenol-d6 (Surr) 24 20 - 127 03/04/26 17:34 03/05/26 20:31 1 Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.59 0.099 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 1,3-Dichlorobenzene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 1,4-Dichlorobenzene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 1-Methylnaphthalene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4,5-Trichlorophenol ND 0.59 0.23 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4,6-Trichlorophenol ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4-Dichlorophenol ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4-Dimethylphenol ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4-Dinitrophenol ND 2.3 1.1 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4-Dinitrotoluene ND 0.59 0.095 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,6-Dichlorophenol ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,6-Dinitrotoluene ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Eurofins Calscience

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4601
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 2-Chloronaphthalene
2-Chlorophenol ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2-Methylnaphthalene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2-Methylphenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2-Nitroaniline ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2-Nitrophenol ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 3,3'-Dichlorobenzidine ND 2.9 0.63 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 3/4-Methylphenol ND 1.2 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 3-Nitroaniline ND 0.59 0.098 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4,6-Dinitro-2-methylphenol ND 2.9 1.1 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Bromophenyl phenyl ether ND 0.59 0.086 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Chloro-3-methylphenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Chloroaniline ND 0.59 0.097 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Chlorophenyl phenyl ether ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Nitroaniline ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 4-Nitrophenol ND 0.59 0.37 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Acenaphthene ND 0.59 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Acenaphthylene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Aniline ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Anthracene ND 0.59 0.091 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Azobenzene ND 0.59 0.092 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzidine ND 5.9 0.67 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzo[a]anthracene ND 0.59 0.098 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzo[a]pyrene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzo[b]fluoranthene ND 0.59 0.099 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzo[g,h,i]perylene ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzo[k]fluoranthene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzoic acid ND 2.9 0.79 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Benzyl alcohol ND 0.59 0.20 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Bis(2-chloroethoxy)methane ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Bis(2-chloroethyl)ether ND 2.9 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 bis(2 chloro-1-methylethyl) ether ND 0.59 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Bis(2-ethylhexyl) phthalate ND 0.59 0.26 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Butyl benzyl phthalate ND 0.59 0.28 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Chrysene ND 0.59 0.097 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Dibenz(a,h)anthracene ND 0.59 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Dibenzofuran ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Diethyl phthalate ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Dimethyl phthalate ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Di-n-butyl phthalate ND 0.59 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Di-n-octyl phthalate ND 0.59 0.27 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Fluoranthene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Fluorene ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Hexachloro-1,3-butadiene ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Hexachlorobenzene ND 0.59 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Hexachlorocyclopentadiene ND 1.8 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Hexachloroethane ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Indeno[1,2,3-cd]pyrene ND 0.59 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Isophorone ND 0.59 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Eurofins Calscience

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4602
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.59 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Naphthalene
Nitrobenzene ND 2.3 0.16 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 N-Nitrosodimethylamine ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 N-Nitrosodi-n-propylamine ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 n-Nitrosodiphenylamine(as ND 0.59 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 diphenylamine)
Pentachlorophenol ND 2.9 2.2 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Phenanthrene ND 0.59 0.085 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Phenol ND 0.59 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Pyrene ND 0.59 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 Pyridine ND 0.59 0.28 mg/Kg ☼ 03/13/26 10:04 03/16/26 16:48 1 2,4,6-Tribromophenol (Surr) 66 20 - 135 03/13/26 10:04 03/16/26 16:48 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 80 28 - 110 03/13/26 10:04 03/16/26 16:48 1 2-Fluorophenol (Surr) 78 20 - 135 03/13/26 10:04 03/16/26 16:48 1 Nitrobenzene-d5 (Surr) 81 22 - 116 03/13/26 10:04 03/16/26 16:48 1 p-Terphenyl-d14 (Surr) 86 27 - 118 03/13/26 10:04 03/16/26 16:48 1 Phenol-d6 (Surr) 78 20 - 127 03/13/26 10:04 03/16/26 16:48 1 Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 1,3-Dichlorobenzene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 1,4-Dichlorobenzene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 1-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4,5-Trichlorophenol ND 0.54 0.21 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4,6-Trichlorophenol ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4-Dichlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4-Dimethylphenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4-Dinitrophenol ND 2.2 0.99 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4-Dinitrotoluene ND 0.54 0.089 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,6-Dichlorophenol ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,6-Dinitrotoluene ND 0.54 0.094 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Chloronaphthalene ND 0.54 0.094 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Chlorophenol ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Methylphenol ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Nitroaniline ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2-Nitrophenol ND *+ 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 3,3'-Dichlorobenzidine ND 2.7 0.59 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 3/4-Methylphenol ND 1.1 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 3-Nitroaniline ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 4,6-Dinitro-2-methylphenol ND 2.7 1.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 4-Bromophenyl phenyl ether ND 0.54 0.080 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 4-Chloro-3-methylphenol ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 4-Chloroaniline ND 0.54 0.090 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Eurofins Calscience

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4603
Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4-Chlorophenyl phenyl ether
4-Nitroaniline ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 4-Nitrophenol ND 0.54 0.34 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Acenaphthene ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Acenaphthylene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Aniline ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Anthracene ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Azobenzene ND 0.54 0.085 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzidine ND 5.4 0.63 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzo[a]anthracene ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzo[a]pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzo[b]fluoranthene ND 0.54 0.092 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzo[g,h,i]perylene ND 0.54 0.097 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzo[k]fluoranthene 0.11 J 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzoic acid ND *+ 2.7 0.73 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Benzyl alcohol ND 0.54 0.18 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Bis(2-chloroethoxy)methane ND 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Bis(2-chloroethyl)ether ND 2.7 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 bis(2 chloro-1-methylethyl) ether ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Bis(2-ethylhexyl) phthalate ND 0.54 0.24 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Butyl benzyl phthalate ND 0.54 0.26 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Chrysene ND 0.54 0.091 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Dibenz(a,h)anthracene ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Dibenzofuran ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Diethyl phthalate ND 0.54 0.13 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Dimethyl phthalate ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Di-n-butyl phthalate 0.27 J 0.54 0.12 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Di-n-octyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Fluorene ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Hexachloro-1,3-butadiene ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Hexachlorobenzene ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Hexachlorocyclopentadiene ND 1.6 0.094 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Hexachloroethane ND 0.54 0.10 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Indeno[1,2,3-cd]pyrene ND 0.54 0.14 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Isophorone ND 0.54 0.087 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Naphthalene ND 0.54 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Nitrobenzene ND 2.2 0.15 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 N-Nitrosodimethylamine ND 0.54 0.097 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 N-Nitrosodi-n-propylamine ND 0.54 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 n-Nitrosodiphenylamine(as ND 0.54 0.093 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 diphenylamine)
Pentachlorophenol ND 2.7 2.0 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Phenanthrene ND 0.54 0.079 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Phenol ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Pyrene ND 0.54 0.11 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 Pyridine ND *1 0.54 0.26 mg/Kg ☼ 03/04/26 17:34 03/05/26 21:19 1 2,4,6-Tribromophenol (Surr) 56 20 - 135 03/04/26 17:34 03/05/26 21:19 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
2-Fluorobiphenyl (Surr) 55 28 - 110 03/04/26 17:34 03/05/26 21:19 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 40 20 - 135 03/04/26 17:34 03/05/26 21:19 1 Nitrobenzene-d5 (Surr) 56 22 - 116 03/04/26 17:34 03/05/26 21:19 1 p-Terphenyl-d14 (Surr) 66 27 - 118 03/04/26 17:34 03/05/26 21:19 1 Phenol-d6 (Surr) 31 20 - 127 03/04/26 17:34 03/05/26 21:19 1 Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 1,2,4-Trichlorobenzene
1,2-Dichlorobenzene ND 0.54 0.091 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 1,3-Dichlorobenzene ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 1,4-Dichlorobenzene ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 1-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4,5-Trichlorophenol ND 0.54 0.21 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4,6-Trichlorophenol ND 0.54 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4-Dichlorophenol ND 0.54 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4-Dimethylphenol ND 0.54 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4-Dinitrophenol ND 2.2 0.99 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4-Dinitrotoluene ND 0.54 0.088 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,6-Dichlorophenol ND 0.54 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,6-Dinitrotoluene ND 0.54 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Chloronaphthalene ND 0.54 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Chlorophenol ND 0.54 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Methylnaphthalene ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Methylphenol ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Nitroaniline ND 0.54 0.099 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2-Nitrophenol ND 0.54 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 3,3'-Dichlorobenzidine ND 2.7 0.58 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 3/4-Methylphenol ND 1.1 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 3-Nitroaniline ND 0.54 0.091 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4,6-Dinitro-2-methylphenol ND 2.7 1.0 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Bromophenyl phenyl ether ND 0.54 0.079 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Chloro-3-methylphenol ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Chloroaniline ND 0.54 0.089 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Chlorophenyl phenyl ether ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Nitroaniline ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 4-Nitrophenol ND 0.54 0.34 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Acenaphthene ND 0.54 0.086 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Acenaphthylene ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Aniline ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Anthracene ND 0.54 0.084 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Azobenzene ND 0.54 0.085 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzidine ND 5.4 0.62 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzo[a]anthracene ND 0.54 0.090 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzo[a]pyrene ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzo[b]fluoranthene ND 0.54 0.092 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzo[g,h,i]perylene ND 0.54 0.097 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8270C - Semivolatile Organic Compounds (GC/MS) (Continued) Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Benzo[k]fluoranthene
Benzoic acid ND 2.7 0.73 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Benzyl alcohol ND 0.54 0.18 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Bis(2-chloroethoxy)methane ND 0.54 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Bis(2-chloroethyl)ether ND 2.7 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 bis(2 chloro-1-methylethyl) ether ND 0.54 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Bis(2-ethylhexyl) phthalate ND 0.54 0.24 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Butyl benzyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Chrysene ND 0.54 0.090 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Dibenz(a,h)anthracene ND 0.54 0.087 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Dibenzofuran ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Diethyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Dimethyl phthalate ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Di-n-butyl phthalate ND 0.54 0.12 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Di-n-octyl phthalate ND 0.54 0.25 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Fluoranthene ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Fluorene ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Hexachloro-1,3-butadiene ND 0.54 0.14 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Hexachlorobenzene ND 0.54 0.087 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Hexachlorocyclopentadiene ND 1.6 0.094 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Hexachloroethane ND 0.54 0.10 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Indeno[1,2,3-cd]pyrene ND 0.54 0.13 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Isophorone ND 0.54 0.086 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Naphthalene ND 0.54 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Nitrobenzene ND 2.2 0.15 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 N-Nitrosodimethylamine ND 0.54 0.097 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 N-Nitrosodi-n-propylamine ND 0.54 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 n-Nitrosodiphenylamine(as ND 0.54 0.093 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 diphenylamine)
Pentachlorophenol ND 2.7 2.0 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Phenanthrene ND 0.54 0.078 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Phenol ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Pyrene ND 0.54 0.11 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 Pyridine ND 0.54 0.26 mg/Kg ☼ 03/13/26 10:04 03/16/26 17:11 1 2,4,6-Tribromophenol (Surr) 75 20 - 135 03/13/26 10:04 03/16/26 17:11 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorobiphenyl (Surr) 78 28 - 110 03/13/26 10:04 03/16/26 17:11 1 2-Fluorophenol (Surr) 80 20 - 135 03/13/26 10:04 03/16/26 17:11 1 Nitrobenzene-d5 (Surr) 80 22 - 116 03/13/26 10:04 03/16/26 17:11 1 p-Terphenyl-d14 (Surr) 81 27 - 118 03/13/26 10:04 03/16/26 17:11 1 Phenol-d6 (Surr) 76 20 - 127 03/13/26 10:04 03/16/26 17:11 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8015C - Gasoline Range Organics (GRO) (GC) Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.048 mg/Kg ☼ 03/06/26 09:13 03/06/26 12:40 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 100 42 - 126 03/06/26 09:13 03/06/26 12:40 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.10 0.045 mg/Kg ☼ 03/06/26 09:13 03/06/26 13:04 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 98 42 - 126 03/06/26 09:13 03/06/26 13:04 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.10 0.046 mg/Kg ☼ 03/06/26 09:13 03/06/26 13:27 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 96 42 - 126 03/06/26 09:13 03/06/26 13:27 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.10 0.044 mg/Kg 03/06/26 09:13 03/06/26 13:50 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 96 42 - 126 03/06/26 09:13 03/06/26 13:50 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Date Collected: 02/28/26 09:55 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.10 0.044 mg/Kg 03/07/26 11:46 03/07/26 15:33 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 85 42 - 126 03/07/26 11:46 03/07/26 15:33 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.047 mg/Kg ☼ 03/06/26 09:13 03/06/26 14:36 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 99 42 - 126 03/06/26 09:13 03/06/26 14:36 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8015C - Gasoline Range Organics (GRO) (GC) Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.12 0.052 mg/Kg ☼ 03/06/26 09:13 03/06/26 14:59 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 97 42 - 126 03/06/26 09:13 03/06/26 14:59 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Date Collected: 02/28/26 15:12 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.12 0.053 mg/Kg ☼ 03/06/26 09:13 03/06/26 15:22 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 95 42 - 126 03/06/26 09:13 03/06/26 15:22 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-1-15.0 Lab Sample ID: 570-269712-15 Date Collected: 02/28/26 15:20 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.048 mg/Kg ☼ 03/06/26 09:13 03/06/26 17:25 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 96 42 - 126 03/06/26 09:13 03/06/26 17:25 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.051 mg/Kg ☼ 03/06/26 09:13 03/06/26 17:48 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 99 42 - 126 03/06/26 09:13 03/06/26 17:48 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.048 mg/Kg ☼ 03/06/26 09:13 03/06/26 18:11 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 98 42 - 126 03/06/26 09:13 03/06/26 18:11 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.11 0.048 mg/Kg ☼ 03/06/26 09:13 03/06/26 18:34 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Gasoline Range Organics (C4-C12)
4-Bromofluorobenzene (Surr) 96 42 - 126 03/06/26 09:13 03/06/26 18:34 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: EPA 8015C - Diesel Range Organics (DRO) (GC)
Client Sample ID: EKI-SB-10-0.5 Lab Sample ID: 570-269712-1 Date Collected: 03/01/26 13:21 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
22 5.4 4.7 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:01 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) 220 27 4.7 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:01 1 n-Octacosane (Surr) 79 29 - 160 03/05/26 10:16 03/09/26 13:01 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-10-2.0 Lab Sample ID: 570-269712-2 Date Collected: 03/01/26 13:24 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.2 4.5 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:28 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) 8.7 J 26 4.5 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:28 1 n-Octacosane (Surr) 84 29 - 160 03/05/26 10:16 03/09/26 13:28 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-10-5.0 Lab Sample ID: 570-269712-3 Date Collected: 03/01/26 13:28 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.2 4.5 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:55 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 26 4.5 mg/Kg ☼ 03/05/26 10:16 03/09/26 13:55 1 n-Octacosane (Surr) 83 29 - 160 03/05/26 10:16 03/09/26 13:55 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 4.9 4.3 mg/Kg 03/05/26 10:16 03/09/26 14:22 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) 5.8 J 25 4.3 mg/Kg 03/05/26 10:16 03/09/26 14:22 1 n-Octacosane (Surr) 81 29 - 160 03/05/26 10:16 03/09/26 14:22 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Date Collected: 02/28/26 09:55 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 4.9 4.3 mg/Kg 03/05/26 10:16 03/09/26 14:49 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 24 4.3 mg/Kg 03/05/26 10:16 03/09/26 14:49 1 n-Octacosane (Surr) 82 29 - 160 03/05/26 10:16 03/09/26 14:49 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-UST-1-8.0 Lab Sample ID: 570-269712-12 Date Collected: 02/28/26 11:00 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL

8.0 5.4 4.8 mg/Kg ☼ 03/05/26 10:16 03/09/26 15:16 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) 38 27 4.8 mg/Kg ☼ 03/05/26 10:16 03/09/26 15:16 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: EPA 8015C - Diesel Range Organics (DRO) (GC) (Continued) n-Octacosane (Surr) 79 29 - 160 03/05/26 10:16 03/09/26 15:16 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-UST-1-15.0 Lab Sample ID: 570-269712-13 Date Collected: 02/28/26 11:10 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.8 5.1 mg/Kg ☼ 03/05/26 10:16 03/09/26 15:43 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 29 5.1 mg/Kg ☼ 03/05/26 10:16 03/09/26 15:43 1 n-Octacosane (Surr) 80 29 - 160 03/05/26 10:16 03/09/26 15:43 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Date Collected: 02/28/26 15:12 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 6.2 5.4 mg/Kg ☼ 03/05/26 10:16 03/09/26 16:10 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 31 5.4 mg/Kg ☼ 03/05/26 10:16 03/09/26 16:10 1 n-Octacosane (Surr) 80 29 - 160 03/05/26 10:16 03/09/26 16:10 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-1-15.0 Lab Sample ID: 570-269712-15 Date Collected: 02/28/26 15:20 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 0.054 0.047 mg/Kg ☼ 03/05/26 10:16 03/09/26 16:37 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 0.27 0.047 mg/Kg ☼ 03/05/26 10:16 03/09/26 16:37 1 n-Octacosane (Surr) 81 29 - 160 03/05/26 10:16 03/09/26 16:37 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-9-8.5 Lab Sample ID: 570-269712-16 Date Collected: 03/01/26 09:25 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.9 5.1 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:04 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 29 5.1 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:04 1 n-Octacosane (Surr) 76 29 - 160 03/05/26 10:16 03/09/26 17:04 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Client Sample ID: EKI-SB-7-2.5 Lab Sample ID: 570-269712-17 Date Collected: 03/01/26 09:41 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.4 4.7 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:31 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 27 4.7 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:31 1 n-Octacosane (Surr) 79 29 - 160 03/05/26 10:16 03/09/26 17:31 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: EPA 8015C - Diesel Range Organics (DRO) (GC)
Client Sample ID: EKI-SB-8-1.5 Lab Sample ID: 570-269712-18 Date Collected: 03/01/26 09:38 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.4 4.8 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:58 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac DRO (C13-C22)
ORO (C23-C40) ND 27 4.8 mg/Kg ☼ 03/05/26 10:16 03/09/26 17:58 1 n-Octacosane (Surr) 79 29 - 160 03/05/26 10:16 03/09/26 17:58 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8081B - Organochlorine Pesticides (GC)
Client Sample ID: EKI-SB-1-5.5 Lab Sample ID: 570-269712-4 Date Collected: 02/28/26 15:05 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 21:32 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 alpha-BHC ND 5.0 0.58 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 beta-BHC ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 delta-BHC ND 5.0 0.92 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Dieldrin ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endosulfan sulfate ND 5.0 0.62 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Endrin ketone ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 gamma-Chlordane ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Heptachlor epoxide ND 5.0 0.53 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 21:32 1 Tetrachloro-m-xylene (Surr) 67 38 - 148 03/04/26 11:44 03/06/26 21:32 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 77 37 - 151 03/04/26 11:44 03/06/26 21:32 1 Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Date Collected: 03/01/26 10:59 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 21:47 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 alpha-BHC ND 5.0 0.59 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 beta-BHC ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 delta-BHC ND 5.0 0.93 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Dieldrin ND 5.0 0.55 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endosulfan sulfate ND 5.0 0.63 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Endrin ketone ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 gamma-Chlordane ND 5.0 3.4 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8081B - Organochlorine Pesticides (GC) (Continued) Client Sample ID: EKI-SB-2-3.0 Lab Sample ID: 570-269712-5 Date Collected: 03/01/26 10:59 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 21:47 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Heptachlor epoxide
Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 21:47 1 Tetrachloro-m-xylene (Surr) 73 38 - 148 03/04/26 11:44 03/06/26 21:47 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 78 37 - 151 03/04/26 11:44 03/06/26 21:47 1 Client Sample ID: EKI-SB-3-5.5 Lab Sample ID: 570-269712-6 Date Collected: 03/01/26 11:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 22:02 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 alpha-BHC ND 5.0 0.58 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 beta-BHC ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 delta-BHC ND 5.0 0.93 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Dieldrin ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endosulfan sulfate ND 5.0 0.63 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Endrin ketone ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 gamma-Chlordane ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Heptachlor epoxide ND 5.0 0.53 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 22:02 1 Tetrachloro-m-xylene (Surr) 63 38 - 148 03/04/26 11:44 03/06/26 22:02 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 64 37 - 151 03/04/26 11:44 03/06/26 22:02 1 Client Sample ID: EKI-SB-4-5.5 Lab Sample ID: 570-269712-7 Date Collected: 03/01/26 12:11 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 4.9 0.71 ug/Kg 03/04/26 11:44 03/06/26 22:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 4.9 0.68 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 4,4'-DDT ND 4.9 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Aldrin ND 4.9 1.6 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 alpha-BHC ND 4.9 0.58 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 alpha-Chlordane ND 4.9 0.56 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 beta-BHC ND 4.9 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8081B - Organochlorine Pesticides (GC) (Continued) Client Sample ID: EKI-SB-4-5.5 Lab Sample ID: 570-269712-7 Date Collected: 03/01/26 12:11 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 25 4.0 ug/Kg 03/04/26 11:44 03/06/26 22:17 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Chlordane
delta-BHC ND 4.9 0.92 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Dieldrin ND 4.9 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endosulfan I ND 4.9 1.1 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endosulfan II ND 4.9 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endosulfan sulfate ND 4.9 0.62 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endrin ND 4.9 0.66 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endrin aldehyde ND 4.9 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Endrin ketone ND 4.9 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 gamma-Chlordane ND 4.9 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 gamma-BHC (Lindane) ND 4.9 0.51 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Heptachlor ND 4.9 0.59 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Heptachlor epoxide ND 4.9 0.53 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Methoxychlor ND 4.9 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 22:17 1 Tetrachloro-m-xylene (Surr) 71 38 - 148 03/04/26 11:44 03/06/26 22:17 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 78 37 - 151 03/04/26 11:44 03/06/26 22:17 1 Client Sample ID: EKI-SB-5-6.0 Lab Sample ID: 570-269712-8 Date Collected: 03/01/26 12:42 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 22:32 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 alpha-BHC ND 5.0 0.59 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 beta-BHC ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 delta-BHC ND 5.0 0.93 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Dieldrin ND 5.0 0.55 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endosulfan sulfate ND 5.0 0.63 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Endrin ketone ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 gamma-Chlordane ND 5.0 3.4 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Heptachlor epoxide ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 22:32 1 Tetrachloro-m-xylene (Surr) 67 38 - 148 03/04/26 11:44 03/06/26 22:32 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 61 37 - 151 03/04/26 11:44 03/06/26 22:32 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8081B - Organochlorine Pesticides (GC)
Client Sample ID: EKI-SB-6-4.5 Lab Sample ID: 570-269712-9 Date Collected: 03/01/26 13:09 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 4.9 0.71 ug/Kg 03/04/26 11:44 03/06/26 22:47 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 4.9 0.68 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 4,4'-DDT ND 4.9 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Aldrin ND 4.9 1.6 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 alpha-BHC ND 4.9 0.58 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 alpha-Chlordane ND 4.9 0.56 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 beta-BHC ND 4.9 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Chlordane ND 25 4.0 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 delta-BHC ND 4.9 0.92 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Dieldrin ND 4.9 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endosulfan I ND 4.9 1.1 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endosulfan II ND 4.9 0.54 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endosulfan sulfate ND 4.9 0.62 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endrin ND 4.9 0.67 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endrin aldehyde ND 4.9 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Endrin ketone ND 4.9 0.89 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 gamma-Chlordane ND 4.9 3.3 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 gamma-BHC (Lindane) ND 4.9 0.51 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Heptachlor ND 4.9 0.59 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Heptachlor epoxide ND 4.9 0.53 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Methoxychlor ND 4.9 1.2 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 22:47 1 Tetrachloro-m-xylene (Surr) 77 38 - 148 03/04/26 11:44 03/06/26 22:47 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 85 37 - 151 03/04/26 11:44 03/06/26 22:47 1 Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 23:01 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 alpha-BHC ND 5.0 0.59 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 beta-BHC ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 delta-BHC ND 5.0 0.93 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Dieldrin ND 5.0 0.55 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endosulfan sulfate ND 5.0 0.63 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Endrin ketone ND 5.0 0.90 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 gamma-Chlordane ND 5.0 3.4 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Eurofins Calscience

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Client Sample Results
Client: EKI Environment & Water Inc Job ID: 570-269712-1 Project/Site: Borrmann Steel Company
Method: SW846 8081B - Organochlorine Pesticides (GC) (Continued) Client Sample ID: EKI-DB-2-7.0 Lab Sample ID: 570-269712-10 Date Collected: 02/28/26 09:40 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 23:01 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac Heptachlor epoxide
Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 23:01 1 Tetrachloro-m-xylene (Surr) 73 38 - 148 03/04/26 11:44 03/06/26 23:01 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 82 37 - 151 03/04/26 11:44 03/06/26 23:01 1 Client Sample ID: EKI-DB-2-15.0 Lab Sample ID: 570-269712-11 Date Collected: 02/28/26 09:55 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 5.0 0.71 ug/Kg 03/04/26 11:44 03/06/26 23:16 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 5.0 0.68 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 4,4'-DDT ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Aldrin ND 5.0 1.6 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 alpha-BHC ND 5.0 0.59 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 alpha-Chlordane ND 5.0 0.56 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 beta-BHC ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Chlordane ND 25 4.1 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 delta-BHC ND 5.0 0.93 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Dieldrin ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endosulfan I ND 5.0 1.1 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endosulfan II ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endosulfan sulfate ND 5.0 0.63 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endrin ND 5.0 0.67 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endrin aldehyde ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Endrin ketone ND 5.0 0.89 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 gamma-Chlordane ND 5.0 3.3 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 gamma-BHC (Lindane) ND 5.0 0.51 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Heptachlor ND 5.0 0.60 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Heptachlor epoxide ND 5.0 0.54 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Methoxychlor ND 5.0 1.2 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Toxaphene ND 25 15 ug/Kg 03/04/26 11:44 03/06/26 23:16 1 Tetrachloro-m-xylene (Surr) 75 38 - 148 03/04/26 11:44 03/06/26 23:16 1 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 76 37 - 151 03/04/26 11:44 03/06/26 23:16 1 Client Sample ID: EKI-SB-1-7.0 Lab Sample ID: 570-269712-14 Date Collected: 02/28/26 15:12 Matrix: Solid
Date Received: 03/02/26 11:45
RL MDL
ND 6.2 0.89 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1
Analyte Result Qualifier Unit D Prepared Analyzed Dil Fac 4,4'-DDD
4,4'-DDE ND 6.2 0.85 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 4,4'-DDT ND 6.2 1.5 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 Aldrin ND 6.2 2.0 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 alpha-BHC ND 6.2 0.73 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 alpha-Chlordane ND 6.2 0.70 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 beta-BHC ND 6.2 1.1 ug/Kg ☼ 03/04/26 12:30 03/06/26 23:31 1 Eurofins Calscience

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Burbank City CouncilJune 2, 2026

Burbank City Council
June 2, 2026