Issuu

I hereby certify that this report was prepared by me or under my direct supervision and that I am a duly Registered Geologist under the laws of the State of Missouri.

01/16/2026

Anthony Schroer RG #: 2010039499 Date

2025 Blue Valley Facility CCR

Tables

Table 1 IPL Well Construction Summary

Table 2 Groundwater Elevation Summary

Table 3 Groundwater Analytical Summary

Figures

Figure 1 Site Location

Figure 2 Site Layout

Figure 3 Monitoring Well Locations

Figure 4 Groundwater Contours – June 2025

Figure 5 Groundwater Contours – December 2025

Figure 6 June 2025 Groundwater Concentrations

Figure 7 December 2025 Groundwater Concentrations

Appendices

Appendix A Hydrographs

Appendix B Well Installation Notes

Appendix C Field Notes

Appendix D Laboratory Analytical Data

Abbreviations

CCR coal combustion residual

COC chain of custody

GMSAP Groundwater Monitoring Sampling and Analysis Plan

gpm gallons per minute

IPL Independence Power and Light

MCL maximum contaminant level

MDNR Missouri Department of Natural Resources

MRBCA Missouri Risk-Based Corrective Action

MSL mean sea level

MSOP Missouri State Operating Permit

ORP oxidation-reduction potential

QC Quality Control

USDA United States Department of Agriculture

USEPA United States Environmental Protection Agency

1 Introduction

Independence Power and Light (IPL) owns three closed and capped, former coal combustion residuals (CCR) impoundments totaling approximately 54-acres, at the Blue Valley Power Plant (Site) in Independence, Missouri (Figure 1). The Missouri State Operating Permit (MSOP), MO-0115924, Part C. Special Condition 16., for the facility outlines a list of requirements that includes groundwater monitoring for the site.

On behalf of the Independence Power and Light (IPL), Barr Engineering Co. (Barr) has prepared this 2025 Groundwater Monitoring Report for the IPL Blue Valley Power Plant Facility located at 21500 East Truman Road in Independence, Missouri.

Project sampling activities conducted in May and October 2025 included routine groundwater monitoring and well inspections. This report presents the field data and analytical results for both of the 2025 monitoring events.

1.1 Site Background

The Facility was constructed in 1958 as a tri-fuel steam electric power plant that burned coal, diesel, and natural gas until 2015, when it ceased power production from coal and diesel and was converted to a natural gas facility. Two of the original CCR impoundments, the south fly ash pond, and bottom ash pond were built in 1978. The north fly ash pond was constructed in 1989. The Facility sluiced bottom ash and fly ash into the ponds until 2015. Upon the discontinuation of ash sluicing into the CCR impoundments, the former impoundments became “inactive surface impoundments” subject to the requirements of the Federal CCR Rule, 40 CFR 257.100, Subpart D. The Notice of Closure Completion for all three former impoundments was submitted to the Missouri Department of Natural Resources (MDNR) on December 19, 2017.

The Site is located approximately seven miles south of the Missouri River in the north central portion of Jackson County at 21500 East Truman Road in Independence, Missouri in Section 3, Township 49N, and Range 31W. Figure 2 displays the Site location and impoundment boundary. The Site is located within the Central Irregular Plains Ecoregion of west central Missouri. Potential natural vegetation of this ecoregion includes a mix of grassland and forest, with forested areas particularly located along streams (Purdue, 2020). Land use adjacent to the Site, displayed on Figure 2, is primarily industrial and agricultural, with industries located north, south, and west of the Site and agricultural land located to the east. An isolated residential area is also located north of the Site.

Regional topography is characterized by hills and associated dendritic drainage patterns with approximately 150 feet of relief within one mile of the Site. Hills north and west of the Facility have elevations as high as 900 feet above mean sea level (MSL). The Site has features with elevations that range from approximately 750 to 800 feet above MSL and slope from the northwest to southeast (Figure 1). A topographic divide, located in the southwest portion of the Site, separates the Little Blue River and Burr Oak-Creek-Little Blue River subwatersheds (Hydrologic Unit Code 12).

1.2 Regional Geology

The surficial soils of the region and portions of the Site outside the former impoundments consist primarily of unconsolidated alluvial sediments known as the Sibley Silt Loam series. According to the Soil Survey of Jackson County, Missouri (1984) developed by the United States Department of Agriculture (USDA),

the Sibley Silt Loam is a friable, moderate permeability soil with naturally high fertility (USDA, 1984). The surface layer is generally dark brown, the middle sections can be dark brown to grey, and the lower sections are generally more clayey and dark yellowish-brown with various mottles.

Based on the report, City of Independence, Missouri, Blue Valley Generating Station Ash Pond Addition and Other Improvements (Burns and McDonnell, 1977), the subsurface soil in the proximity of the former impoundments consists primarily of silty clay with interbedded seams of fine-grained, uncompacted sandy silt. The report provides descriptive logs for 27 borings drilled in a grid pattern encompassing the area of the former fly ash and bottom ash ponds. The borings ranged in depth from 10 feet to 64 feet bgs.

The bedrock underlying the region and Site consists of Pennsylvanian aged shales, limestones, sandstone, and siltstones with interbedded coal seams. Naturally occurring crude oil was identified in upgradient borings during the Site Characterization performed in 2020. The Pennsylvanian-aged shales overly older Mississippian aged formations (MDNR, 1997).

The Pennsylvanian-aged Pleasanton Group is the first bedrock unit encountered in the region, located approximately 25 feet bgs. The Pleasanton Group is predominantly a thick unit of shale with limestone and a basal unit of siltstone or very fined-grained sandstone. Two additional sandstone units, which combined are known as the Warrensburg Sandstone, are sometimes present in the upper half of the group depending on the location. The base of the Pleasanton Group marks a break in the depositional sequence occurring in the Pennsylvanian time. This break in the depositional sequence forms a regional disconformity. Underlying the Pleasanton Group bedrock unit is the Marmaton Group. The Marmaton Group is comprised mainly of thick shales with intervening thin layers of limestone and sandstone.

1.3 Regional Hydrogeology

The hydrogeology around the Site is represented by the Missouri River alluvium and Lake City alluvium, two groundwater subprovinces of the West-Central groundwater province. The Site is primarily located within the Missouri River alluvium, which borders the Lake City alluvium just east of the Site near the Little Blue River. Information describing the West-Central groundwater province and each subprovince is provided below.

The West-Central groundwater province is bounded by the Missouri River to the north, the Springfield Plateau groundwater province to the south and east, and the Kansas state boundary to the west. The greatest potential for groundwater yield within this province is from the alluvial deposits along the northern edge of the province, which include the Missouri River alluvium and Lake City alluvium, further described below. Pennsylvanian-aged formations comprise the bedrock surface units for most of this groundwater province, specifically the Pleasanton and Marmaton Groups in the area of the Site. The Pleasanton and Marmaton Groups in the region have low recharge potential due to their extremely low horizontal and vertical permeabilities and are not considered to be water bearing; the Pleasanton Group is considered to be less productive than the Marmaton Group (MDNR, 2021). Of the small amounts of groundwater that may potentially be drawn from these groups, the groundwater is expected to be of poor quality.

The Missouri River alluvium province is located at the northern portion of the West-Central groundwater province and extends for the entire length of the Missouri River throughout the state with an aerial extent of approximately 440 square miles in the vicinity of the Site. The Missouri River alluvium formed from glacial meltwater runoff during the Pleistocene epoch (Ice Age); the melt water transported a significant amount of sediments that ranged in size from clay particles to boulders, which carved a river channel much wider than the channel occupied by the Missouri River today. Following the Pleistocene epoch,

over-bank flooding of present-day rivers has deposited additional alluvium on river floodplains. The Missouri River and the Missouri River alluvium province experience delayed recharge; studies of wells within the alluvium indicated a delayed response of several days between river stages and groundwater levels. Under normal flow conditions in the Missouri River, groundwater gradients in the Missouri River alluvium are toward the river (MDNR, 1997).

In the report Groundwater Resources of Missouri (MDNR, 1997), the Missouri River alluvium is divided into four segments from the Iowa border to St. Charles, prior to the Missouri River and Mississippi River confluence. For the purpose of this project, the portion of the Missouri River alluvium province discussed in this section is the Kansas City to Miami, Missouri segment. The Missouri River alluvium in this segment composed primarily of fine sand, silt, and clay with coarse sands and gravels comprising the deeper portions of the alluvium. The alluvium has a maximum thickness of 140 feet and an average thickness of 85 to 90 feet. The average saturated thickness of the alluvium is approximately 75 feet for this area. Groundwater from wells within the Missouri River alluvium supplies a majority of the potable water in the Kansas City area. Yields from the Missouri River alluvium may reach 1,000 to 1,500 gallons per minute (gpm) in the more permeable areas of the alluvium (MDNR, 1997).

The Lake City alluvium groundwater subprovince is a 16-mile-long, 1-2-mile-wide channel that begins at the southern edge of the Missouri River alluvium in central Jackson County near the town of Atherton, extends southeast to Lake City, and then trends northeast until it again intersects with the Missouri River alluvium in northeastern Jackson County near the town of Levasy. The Lake City alluvial channel likely formed as a result of an ice damming event on the ancestral Missouri River, which forced the river south of the existing channel and eroded the new channel, which currently serves as the river valley for the Little Blue River from Lake City to the Missouri River. The Site is located on the western edge of the Lake City alluvium channel. A study of this alluvium aquifer at the Lake City Army Ammunition Plant in the early 1940s estimated the alluvium’s thickness to 80 to 90 feet with a depth to water of 15 to 20 feet bgs. Well pumping rates during this study reached 300 to 400 gpm (MDNR, 1997).

2 Hydrogeologic Data and Monitoring

Hydrogeologic monitoring at the Site includes the collection of groundwater elevation data from Site monitoring wells. The monitoring well locations at the Site are shown on Figure 3 and well construction information is located in Table 1.

2.1 Potentiometric Surface Measurements

During the semi-annual 2025 monitoring events, water-levels were collected from the two (2) routinely scheduled groundwater monitoring wells. The resultant elevation data were used to develop potentiometric surface flow maps, assess flow direction, and calculate gradients for the shallow groundwater. A summary of all groundwater elevation data is included as Table 2.

2.2 Groundwater Flow Direction and Gradient

The groundwater elevation data from the Site’s shallow monitoring wells were contoured to construct potentiometric surface maps for each semi-annual event. As graphically illustrated on Figures 4 and 5 groundwater flows generally towards the east which is consistent with historic water elevation data for the Site.

The calculated hydraulic gradient for each of the Semi-Annual 2025 monitoring events is provided below:

Hydraulic gradients measured across the Site range from 0.0005 to 0.004 (range of gradients from three different areas of the Site) for the Semi-Annual 2025 groundwater elevation data (Table 2). The hydraulic gradient measured across the northwestern portion of the Site (MW-6 to MW-8) was calculated to be0.0005 for May 2025 and 0.003 for October 2025. The hydraulic gradient measured across the northeastern portion of the Site (MW-8 to MW-1) was calculated to be 0.002 for May 2025 and 0.003 for October 2025. The hydraulic gradient measured across the central portion of the Site (MW-6 to MW-1) was calculated to be 0.001 for May 2025 and 0.004 for October 2025. It should be noted that water levels measured in the upgradient wells may not be representative of actual static water levels since stabilization subsequent to purging can take several weeks.

The average hydraulic gradient is towards the east with a slope of approximately 0.001 for May and 0.003 for October across the Site. This slope is relatively shallow as compared to previous years likely due to the varying water elevations in the upgradient monitoring wells. An approximate average interstitial velocity across the Site has been estimated to range from 1.86 x 10-3 feet/day to 5.1 x 10-4 feet/day (i.e. 0.7 to 0.2 feet/year) for May 2025 and 4.9 x 10-3 feet/day to 1.3 x 10-3 feet/day (i.e. 1.8 to 0.5 feet/year) for October 2025 as calculated by the following equation and input data:

v = Ki/n, where

v = average interstitial velocity

K = hydraulic conductivity (ranges from 0.388 to 0.171 feet/day)

i = average hydraulic gradient across the Site (0.001 and 0.003)

n = effective porosity (estimated to range from 0.25 to 0.4)

2.3 Groundwater Hydrographs

Overall, groundwater elevations measured in wells during the Semi-Annual events of 2025 monitoring events were relatively consistent with the data from the measurements taken during the previous sampling events (Barr, 2025). Hydrographs of the groundwater elevations are provided in Appendix A.

Due to the relatively higher recharge rates the downgradient well groundwater elevations have not changed significantly from previous monitoring periods. Water levels decreased significantly between the May to October sampling events with an average decrease of 1.73 feet for the downgradient wells. This groundwater elevation change represents measurements with seasonal flux and significantly drier/wetter periods. Additionally, water levels within MW-2 are generally higher than other downgradient wells. The elevated water level is thought to be connected to an impoundment let-down structure located northwest of the well. The let-down structure can be the cause of increased runoff or focused recharge near MW-2, which can create the presence of a groundwater mound.

The groundwater elevation fluctuations in the upgradient wells are typically more prominent than the changes observed in the downgradient wells, however for 2025 the water level changes were less than in previous years. The depth to water measurements for MW-7 were consistent in 2025, however, the overall groundwater elevations appear to be very low when compared to the other upgradient wells. It is likely that MW-7 did not completely stabilize subsequent to purging during each event.

The hydrographs for the upgradient monitoring wells indicates that since the September 2021 monitoring event the water levels have not consistently completely recovered after purging. The water levels for MW8 during the second through eighth quarterly events are on average 11 feet lower than the water level measured during the first semi-annual event. The water levels for MW-7 have varied almost 30 feet over the course of monitoring. The water levels for MW-6 have varied almost 5 feet from 2021 to 2025. The variations in the water levels for the upgradient wells is likely due to groundwater levels not completely recharging between the quarterly sampling events, but may also be impacted by varying amounts of recharge from upgradient locations.

Groundwater levels for active monitoring wells are presented in Table 2.

2.4 Groundwater Monitoring Network

In August 2025, monitoring well MW-2 was damaged during routine ground maintenance activities. Unfortunately, the resulting damage terminated monitoring well MW-2’s capability of providing representative groundwater samples.

The monitoring well was replaced on September 18 and 19, 2025. The replacement groundwater monitoring well, hereforth to be referred to as MW-2A, was constructed so that the well specifications are identical to the original monitoring well. Monitoring well MW-2A was installed approximately five feet to the

north of the original monitoring well so that groundwater samples provided by the replacement well are representative of the aquifer and are geochemically equivalent to samples from well MW-2.

The well installation notes, a well construction log, and installation photographs are located in Appendix B.

3 Groundwater Sampling and Field Activities

The field methods for the collection of the samples are described in the Groundwater Monitoring Sampling and Analysis Plan (GMSAP) (Barr, 2021).

3.1 Well Inspection

During the 2025 monitoring events, the sampling crew measured the static water levels in each of the eight active monitoring wells at the site and visually inspected each well’s condition. Any evidence of well damage was documented in the field documents (Appendix C). Table 1 contains a summary of the monitoring well construction including well number designation, measured total depth, elevation for top of screen, and the measured static water level for each well.

3.2 Well Development

During the September 2025 well installation, downgradient monitoring well MW-2A was developed. The well development was conducted by surging and overpumping. This process consisted of surging the well with a solid surge block to break down any potential sediment or disturbed zones where fine-grained particles may be concentrated in the well screen and purging well water using a submersible pump. The well was pumped until the water became visibly clear or the well purged dry.

3.3 Sample Collection

Groundwater samples were collected during two semi-annual sampling events (May 2025 and October 2025) from the eight active monitoring wells at the Site. For the October 2025 sampling event the groundwater sample was collected from monitoring well MW-2A as it had been previously installed and well MW-2 had been abandoned. Groundwater sampling was conducted using bailers and low stress (low flow) methodology in compliance with the GMSAP (Barr, 2021). For the downgradient wells sampled via low stress (low flow) methodology, a submersible pump was lowered into the well screen and pumped at the lowest possible rate until measurements of temperature, pH, specific conductivity, dissolved oxygen, turbidity, and oxidation/reduction potential (ORP) stabilized. These parameters can be found on the field logs in Appendix C. The low flow sampling was performed in compliance with Section 3.0, Section 4.0, and Appendix D of the GMSAP.

For the upgradient wells sampled via bailers, the wells were purged at least three weeks prior to the sampling events. During the sampling event the bailers were extracted from the wells and the samples collected. Water quality parameters were collected via bailer immediately subsequent to the sample collection.

For quality control (QC) purposes duplicate samples were collected during each sampling event. During both sampling events, duplicate samples were collected from downgradient well MW-5 for both the June sampling event and the October sampling event.

4 Groundwater Analytical Results

4.1 May 2025

Groundwater samples were collected from all monitoring wells installed at the Site. Table 3 summarizes the groundwater concentration data from the wells and compares the concentrations against the USEPA’s MCLs (40 CFR 141.62 and 257.95). Groundwater samples from the May 2025 sampling event that exceeded United States Environmental Protection Agency’s (USEPA) maximum contaminant levels (MCLs) are shown on Figure 6. The laboratory analytical results are provided in Appendix D.

Groundwater concentration exceedances of the United States Environmental Protection Agency (USEPA) MCLs for total/dissolved arsenic and total/dissolved lithium were identified in some of the samples both upgradient and downgradient of the closed impoundments. The following list summarizes the exceedances for each constituent:

• Total and dissolved arsenic: Groundwater concentrations exceeded the total arsenic MCL of 10 µg/L at downgradient monitoring wells MW-2, MW-3, and MW-4. Total arsenic concentrations at the wells ranged from 11.6 to 67 µg/L. Groundwater concentrations exceeded the dissolved arsenic MCL of 10 µg/L at downgradient monitoring wells MW-3 and MW-4. Dissolved arsenic concentrations at MW-3 and MW-4 were 18.3 and 27.6 ug/L respectively.

• Total and dissolved lithium: Groundwater concentrations exceed the total lithium MCL of 40 µg/L at upgradient monitoring wells MW-6, MW-7, and MW-8. Total lithium concentrations at the wells ranged from 41.7 to 64.9 µg/L. Groundwater concentrations exceeded the dissolved lithium MCL of 40 µg/L at upgradient monitoring wells MW-6 and MW-8. Dissolved lithium concentrations for MW-6 and MW8 were 55.6 and 90.3 µg/L respectively.

4.2 October 2025

During the October 2025 sampling event, groundwater samples were collected from all eight monitoring wells installed at the Site. Groundwater samples from the October 2025 sampling event that exceeded USEPA’s MCLs on Figure 7.

Groundwater concentration exceedances of the USEPA MCLs for total/dissolved arsenic and total/dissolved lithium were identified in some of the samples in wells both upgradient and downgradient of the closed impoundments. The following list summarizes the exceedances for each constituent:

• Total and dissolved arsenic: Groundwater concentrations exceeded the total and dissolved arsenic MCL of 10 µg/L at downgradient monitoring wells MW-3 and MW-4. Total arsenic concentrations for MW-3 and MW-4 were 38.1 and 72.6 µg/L respectively. Dissolved concentrations in MW-3 and MW-4 were 16.5 and 13.3 ug/L respectively.

• Total and dissolved lithium: Groundwater concentrations exceed the lithium MCL of 40 µg/L at upgradient monitoring wells MW-6 and MW-8. The total lithium concentrations for wells MW-6 and MW-8 were 64.9 and 87.1 µg/L respectively. The dissolved lithium concentrations for wells MW-6 and MW-8 were 59.4 and 96.1 µg/L respectively.

5 Conclusions

and Recommendations

The results of the 2025 groundwater sampling events at the Site have been summarized in the previous sections and the conclusions and recommendations based on those results are outlined in the following paragraphs.

5.1 Site Groundwater

Upgradient and downgradient groundwater sample concentrations indicate that the groundwater contains metals concentrations for arsenic and lithium that exceed the MCLs in some of the upgradient and downgradient wells. As discussed in the Site Characterization Report (Barr, 2020), the native materials at the Site contain concentrations of metals that exceed the Missouri Risk-Based Corrective Action (MRBCA) Default Target Levels and are naturally occurring metals in the native materials that are typically associated with CCR material. Therefore, the native soil around the former impoundments is likely to be a source for metals in the groundwater.

The upgradient wells MW-6, MW-7, and MW-8 have lithium concentrations that exceed the USEPA MCLs. Since these wells are upgradient of the CCR impoundments, it is unlikely that these concentrations are a result of the impoundment materials. As discussed above, the lithium concentrations are very likely natural occurring from the native materials. This is supported by the presence of lithium in MW-7 which is located several hundred feet upgradient of the CCR impoundments and is not likely to being experiencing potential impoundment impacts that far upgradient. Also, the detection of lithium in downgradient wells would represent continued presence of lithium in the groundwater as it moves downgradient and is not likely related to the impoundments.

Historically the dissolved arsenic concentrations in the downgradient monitoring wells have been below or slightly over the total arsenic MCL of 10 µg/L. In comparison, the total arsenic concentrations in the downgradient monitoring wells with the exception of MW-5 have exceeded the total arsenic MCL of 10 µg/L and typically range from 20 to 40 µg/L. The disparity between the dissolved and total concentrations is usually due to fine-grained suspended particulates in the water column that are included with the sample volume. These fine-grained particulates bias the sample and result in an elevated total concentration.

The downgradient sampling event results for 2025 are very to those collected in 2024. Elevated arsenic concentrations for both the dissolved and total samples were detected in both the May and October events. The dissolved arsenic concentrations ranged from 13.3 to 27.6 µg/L for the two monitoring wells. The totals arsenic concentrations were higher and ranged from 36.9 to 72.6 µg/L for monitoring wells MW-3 and MW-4. In addition, there was a total arsenic detection of 11.6 µg/L for MW-2 in May 2025. Overall, these concentrations appear lower than those detected in 2024. It is still unclear as to what may be the reason for the continued increase in arsenic concentrations. It should be noted that arsenic was not detected above 10 ug/L in either MW-1 or the furthest downgradient well, MW-5, during either May or October 2025 sampling events.

5.2 Groundwater Flow

Results of the Site Characterization Report (Barr, 2020) indicates that the shallow groundwater underlying the site migrates slowly, particularly in the upgradient wells, due to the fine-grained nature/low permeability of the unconsolidated units underlying the former impoundments.

The groundwater data continues to be consistent with previous observations made regarding groundwater flow and direction. The groundwater flow at the Site is primarily to the east/southeast and groundwater underlying the former impoundments migrates primarily through the sand layers in the unconsolidated units.

Since groundwater contact with the impoundment material is limited, it is unlikely that leaching of metals from CCR materials is occurring via lateral groundwater movement through the former impoundment. In addition, to date, groundwater elevations measured from groundwater wells do not indicate that groundwater is migrating through CCR materials in the northwest corner of the impoundment area. Therefore, the potential for COCs to migrate is primarily via vertical leaching of the low volumes of meteoric water that infiltrates through the engineered cap.

6 References

Barr, 2024. Blue Valley Coal Combustion Residuals Impoundment Baseline Monitoring Statistical Summary Report, Independence Power and Light Blue Valley Power Plant, Independence, Missouri. February 2024.

Barr, 2021. Blue Valley Coal Combustion Residuals Impoundment Groundwater Monitoring Sampling and Analysis Plan, Independence Power and Light Blue Valley Power Plant, Independence, Missouri. July 2021.

Barr, 2020. Blue Valley Coal Combustion Residuals Impoundment Site Characterization Report, Independence Power and Light Blue Valley Power Plant, Independence, Missouri. May 2020.

Burns and McDonnell, 1977. City of Independence, Missouri, Blue Valley Generating Station Ash Pond Addition and Other Improvements, May 1977.

Freeze, R. A. and J. A. Cherry, 1979. Groundwater, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 604p.

Missouri Department of Natural Resources, 2021. Geosciences Technical Resources Assessment Tool Website, URL: https://dnr.mo.gov/geology/geostrat.htm. Accessed January 2020.

Missouri Department of Natural Resources Division of Geology and Land Survey, 1997. Groundwater Resources of Missouri, Don E. Miller, 1997.

Purdue University, 2020. Primary Distinguishing Characteristics of Level III Ecoregions of the Continental United States Website, URL: https://hort.purdue.edu/newcrop/cropmap/ecoreg/descript.html#40.

Accessed July – September, 2019.

US Department of Agriculture, 1984. Soil Survey of Jackson County, Missouri. September 1984

(1) Elevations were surveyed on 5/5/2020.

LocationMW-5MW-5 Date5/15/202510/07/2025

5/15/202510/07/20255/15/202510/07/20255/15/202510/07/20255/15/202510/07/20255/15/202510/07/20255/15/202510/07/20255/15/202510/07/2025

Sample Type

ParameterUnits

Last Updated 04/01/202408/28/2020 Exceedance KeyBold Underline

General Parameters

Carbon,

Chemical Oxygen

Fluorideug/l4000<

Hardness, as CaCO3ug/l648000319000826000636000511000549000321000319000388

Nitrogen, nitrate, as

Nitrogen, nitrite, as Nug/l1000<

Solids, total

Sulfate, as SO4ug/l10700064200143000193000<

Dissolved oxygenug/l470210240260200240190230390--310--44602900471028305

Specific conductance @ 25 deg Cumhos/cm10294991124108610581150845883521--665--1116143311369729041448 Temperaturedeg C15.515.614.516.115.116.014.517.116.3--15.9--16.814.517.015.316.514.4 TurbidityNTU 5 (19)177.355.42140.47

Dissolved Metals

Bariumug/l200085.510734282455647332427130834529729564172213414817.5185

Boronug/l326075238.4<

Calciumug/l168000959002050001800001740001510001040008210091700102000810007990058400658001420015000157052400

Cobaltug/l63.41.91.9<

Copperug/l1300

Ironug/l59989829505680201020603200112026.028010090.8229317<

Lithiumug/l4020.37.813.316.09.26.815.511.93.83.9<

Magnesiumug/l203001360040300333004390036400262002060020800232001

Manganeseug/l59502950736045202410247015901600116010901210124024026477.382.3<

Molybdenumug/l1001.7<

Nickelug/l9.07.91.9<

Sodiumug/l62700 J-1940014400 J-1150085400

Bariumug/l2000124120625104074681256358041036632030985990016816354.889.7

Boronug/l425082545.4<

Calciumug/l2160001030002500001950001450001580009170092400112000989008660084900715007230017500159002570034300

Cobaltug/l64.6<

Copperug/l1300

Ironug/l370010301810014900156001330021700206002840277070771

Lithiumug/l4025.411.515.918.37.57.313.213.45.45.0<

Magnesiumug/l263001510049200365003600037400224002150026000226001

Manganeseug/l663031308020495026002720207018801240

Molybdenumug/l1002.23.0<

Nickelug/l11.98.72.6<

Sodiumug/l797002080017600121006950073000795008210059200516004

Not analyzed/Not available.

N Sample Type: Normal

FD Sample Type: Field Duplicate

Barr Standard Footnotes and Qualifiers

H Recommended sample preservation, extraction or analysis holding time was exceeded.

J Estimated detected value. Either certain QC criteria were not met or the concentration is between the laboratory's detection and quantitation limits.

J- The result is an estimated quantity and may be biased low.

U The analyte was analyzed for, but was not detected.

EPA Maximum Contaminant Levels

(19) At no time can turbidity go above 5 NTU. TT(12) Treatment technique; Copper action level 1.3 mg/l; lead action level 0.015 mg/l.

Page 1 of 1 2/4/2026

UnnamedTributarytoLittleBlueRiver

Independence

North Fly Ash Impoundment (Closed)

South Fly Ash Impoundment (Closed) Bottom Ash Impoundment (Closed)

Transportation

Bottom Ash Impoundment (Clean Closure and Converted to a Sedimentation Basin)

FIGURE

FIGURE 3

FIGURE

TRUMAN

Note: Property boundary obtained from Jackson County parcel dataset, MO GIS Department. Imagery: Nearmap, August 2025

FIGURE

MW-6 5/15/2025

DissolvedLithium55.6ug/L

TotalLithium64.9ug/L

MW-8 5/15/2025

DissolvedLithium90.3ug/L

TotalLithium62.6ug/L

MW-7 5/15/2025

TotalLithium41.7ug/L

MW-2 5/15/2025 TotalArsenic 11.6ug/L

MW-3 5/15/2025

DissolvedArsenic 18.3ug/L

36.9ug/L

MW-4 5/15/2025

DissolvedArsenic 27.6ug/L

MW-6 10/7/2025

DissolvedLithium59.4ug/L

TotalLithium64.9ug/L

MW-8 10/7/2025

DissolvedLithium96.1ug/L

TotalLithium87.1ug/L

MW-3 10/7/2025

DissolvedArsenic 16.5ug/L

38.1ug/L

MW-4 10/7/2025

DissolvedArsenic 13.3ug/L

72.6ug/L

FIGURE

Appendices

Appendix A

Hydrographs

MW-2 GROUNDWATER ELEVATION HYDROGRAPH

MW-3 GROUNDWATER ELEVATION HYDROGRAPH

MW-4 GROUNDWATER ELEVATION HYDROGRAPH

MW-8 GROUNDWATER ELEVATION HYDROGRAPH

Well Installation Notes

Appendix C

Field Notes

Laboratory Analytical Data

June 11, 2025

Cameron Dulle Barr Engineering Company

1001 Diamond Ridge Suite 1100

http://www.teklabinc.com/

Illinois100226

Illinois1004652024-2

KansasE-10374

Louisiana05002

Louisiana05003

Oklahoma9978

Jefferson City, MO 65109 (952) 832-2893 (573) 638-5001

TEL: FAX:

25491019.01 RE:

Dear Cameron Dulle:

WorkOrder: 25051581

TEKLAB, INC received 9 samples on 5/16/2025 2:40:00 PM for the analysis presented in the following report.

Samples are analyzed on an as received basis unless otherwise requested and documented. The sample results contained in this report relate only to the requested analytes of interest as directed on the chain of custody. NELAP accredited fields of testing are indicated by the letters NELAP under the Certification column. Unless otherwise documented within this report, Teklab Inc. analyzes samples utilizing the most current methods in compliance with 40CFR. All tests are performed in the Collinsville, IL laboratory unless otherwise noted in the Case Narrative.

All quality control criteria applicable to the test methods employed for this project have been satisfactorily met and are in accordance with NELAP except where noted. The following report shall not be reproduced, except in full, without the written approval of Teklab, Inc.

If you have any questions regarding these tests results, please feel free to call.

Sincerely,

Paul Schultz Project Manager Pschultz@teklabinc.com

Definitions

Client: Barr Engineering Company

Client Project: 25491019.01

AbbrDefinition

*Analytes on report marked with an asterisk are not NELAP accredited

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

CCVContinuing calibration verification is a check of a standard to determine the state of calibration of an instrument between recalibration.

CRQLA Client Requested Quantitation Limit is a reporting limit that varies according to customer request. The CRQL may not be less than the MDL.

DFDilution factor is the dilution performed during analysis only and does not take into account any dilutions made during sample preparation. The reported result is final and includes all dilution factors.

DNIDid not ignite

DUPLaboratory duplicate is a replicate aliquot prepared under the same laboratory conditions and independently analyzed to obtain a measure of precision.

ICVInitial calibration verification is a check of a standard to determine the state of calibration of an instrument before sample analysis is initiated.

IDPHIL Dept. of Public Health

LCSLaboratory control sample is a sample matrix, free from the analytes of interest,spiked with verified known amounts of analytes and analyzed exactly like a sample to establish intra-laboratory or analyst specific precision and bias or to assess the performance of all or a portion of the measurement system.

LCSDLaboratory control sample duplicate is a replicate laboratory control sample that is prepared and analyzed in order to determine the precision of the approved test method. The acceptable recovery range is listed in the QC Package (provided upon request).

MBLKMethod blank is a sample of a matrix similar to the batch of associated sample (when available) that is free from the analytes of interest and is processed simultaneously with and under the same conditions as samples through all steps of the analytical procedures, and in which no target analytes or interferences should present at concentrations that impact the analytical results for sample analyses.

MDL"The method detection limit is defined as the minimum measured concentration of a substance that can be reported with 99% confidence that the measured concentration is distinguishable from method blank results."

MSMatrix spike is an aliquot of matrix fortified (spiked) with known quantities of specific analytes that is subjected to the entire analytical procedures in order to determine the effect of the matrix on an approved test method’s recovery system. The acceptable recovery range is listed in the QC Package (provided upon request).

MSDMatrix spike duplicate means a replicate matrix spike that is prepared and analyzed in order to determine the precision of the approved test method. The acceptable recovery range is listed in the QC Package (provided upon request).

MWMolecular weight

NCData is not acceptable for compliance purposes

NDNot Detected at the Reporting Limit

NELAPNELAP Accredited

PQLPractical quantitation limit means the lowest level that can be reliably achieved within specified limits of precision and accuracy during routine laboratory operation conditions.

RLThe reporting limit the lowest level that the data is displayed in the final report. The reporting limit may vary according to customer request or sample dilution. The reporting limit may not be less than the MDL.

RPDRelative percent difference is a calculated difference between two recoveries (ie. MS/MSD). The acceptable recovery limit is listed in the QC Package (provided upon request).

SPKThe spike is a known mass of target analyte added to a blank sample or sub-sample; used to determine recovery deficiency or for other quality control purposes.

SurrSurrogates are compounds which are similar to the analytes of interest in chemical composition and behavior in the analytical process, but which are not normally found in environmental samples.

TICTentatively identified compound: Analytes tentatively identified in the sample by using a library search. Only results not in the calibration standard will be reported as tentatively identified compounds. Results for tentatively identified compounds that are not present in the calibration standard, but are assigned a specific chemical name based upon the library search, are calculated using total peak areas from reconstructed ion chromatograms and a response factor of one. The nearest Internal Standard is used for the calculation. The results of any TICs must be considered estimated, and are flagged with a "T". If the estimated result is above the calibration range it is flagged "ET"

TNTCToo numerous to count ( > 200 CFU )

Client: Barr Engineering Company

Client Project: 25491019.01

# - Unknown hydrocarbon

C - RL shown is a Client Requested Quantitation Limit

H - Holding times exceeded

J - Analyte detected below quantitation limits

ND - Not Detected at the Reporting Limit

S - Spike Recovery outside recovery limits

X - Value exceeds Maximum Contaminant Level

Definitions

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Qualifiers

B - Analyte detected in associated Method Blank

E - Value above quantitation range

I - Associated internal standard was outside method criteria

M - Manual Integration used to determine area response

R - RPD outside accepted recovery limits

T - TIC(Tentatively identified compound)

http://www.teklabinc.com/

Client Project: 25491019.01

Client: Barr Engineering Company Report Date: 11-Jun-25

Cooler Receipt Temp: 3.9/4.9 °

Work Order: 25051581

This report was revised on 6/11/2025. The reason for the revision is to report total and dissolved Aluminum for all samples. Please replace report dated 6/3/2025 with this report. PS 6/11/25

Collinsville

5445 Horseshoe Lake Road

Collinsville, IL 62234-7425 (618) 344-1004 (618) 344-1005

jhriley@teklabinc.com

Collinsville Air

5445 Horseshoe Lake Road Collinsville, IL 62234-7425 (618) 344-1004 (618) 344-1005

EHurley@teklabinc.com

Locations

Springfield 3920 Pintail Dr Springfield, IL 62711-9415 (217) 698-1004 (217) 698-1005

KKlostermann@teklabinc.com

Chicago 1319 Butterfield Rd. Downers Grove, IL 60515 (630) 324-6855

arenner@teklabinc.com

Kansas City 8421 Nieman Road Lenexa, KS 66214 (913) 541-1998 (913) 541-1998

jhriley@teklabinc.com

Accreditations

Client Project: 25491019.01

Client: Barr Engineering Company Report Date: 11-Jun-25

State

Work Order: 25051581

Dept

Illinois 100226 1/31/2026 Collinsville NELAP IEPA

Illinois 1004652024-2 4/30/2026 Collinsville NELAP IEPA

Kansas E-10374 4/30/2026 Collinsville NELAP KDHE

Louisiana 05002 6/30/2025 Collinsville NELAP LDEQ

Louisiana 05003 6/30/2025 Collinsville NELAP LDEQ

Oklahoma 9978 8/31/2025 Collinsville NELAP ODEQ

Arkansas 88-0966 3/14/2026 Collinsville ADEQ

Illinois 17584 5/31/2025 Collinsville IDPH

Iowa 430 6/1/2026 Collinsville IDNR

Kentucky KY98050 12/31/2025 Collinsville KWLCP

Kentucky KY98006 12/31/2025 Collinsville KWLCP

Kentucky 0073 1/31/2026 Collinsville UST Mississippi 4/30/2026 Collinsville MSDH

Missouri 930 1/31/2028 Collinsville MDNR

Missouri 00930 10/31/2026 Collinsville MDNR

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-001

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW01

Collection Date: 05/15/2025 10:15

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

METHODS 2340 B,

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-001

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW01

Collection Date: 05/15/2025 10:15

Sample result for Mn exceed 10 times the method blank contamination. Data is reportable per the TNI Standard. Sample results for Ca and Fe exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-002

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW02

Collection Date: 05/15/2025 11:05

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-002

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW02

Collection Date: 05/15/2025 11:05

Sample results for Fe and Mn exceed 10 times the method blank contamination. Data is reportable per the TNI Standard. Sample result for Ca exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-003

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW03

Collection Date: 05/15/2025 11:55

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

METHODS 2340 B, HARDNESS (TOTAL) 2011

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-003

Matrix: GROUNDWATER

Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW03

Collection Date: 05/15/2025 11:55

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-004

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW04

Collection Date: 05/15/2025 12:50

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-004

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW04

Collection Date: 05/15/2025 12:50

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-005 Client Sample ID: MW-5

Matrix: GROUNDWATER

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

Sample required re-analysis out of hold time.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2011

3005A, 6020A, METALS BY ICPMS (DISSOLVED)

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 11:20

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-005 Client Sample ID: MW-5

http://www.teklabinc.com/ Analyses

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 11:20

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-006

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: MW-6

Collection Date: 05/15/2025 9:25

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

METHODS 2340 B,

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-006 Client Sample ID: MW-6 Matrix: GROUNDWATER

http://www.teklabinc.com/ Analyses

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 9:25

Sample results for Ca, Fe, and Mn exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-007 Client Sample ID: MW-7

Matrix: GROUNDWATER

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 9:00

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

METHODS 2340 B, HARDNESS (TOTAL) 2011

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-007 Client Sample ID: MW-7 Matrix: GROUNDWATER

http://www.teklabinc.com/ Analyses

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 9:00

Sample result for Ca exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-008 Client Sample ID: MW-8

Matrix: GROUNDWATER

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 10:00

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

METHODS 2340 B, HARDNESS (TOTAL) 2011

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-008 Client Sample ID: MW-8 Matrix: GROUNDWATER

http://www.teklabinc.com/ Analyses

Work Order: 25051581

Report Date: 11-Jun-25

Collection Date: 05/15/2025 10:00

Sample result for Ca exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-009

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: Dup 1

Collection Date: 05/15/2025 0:00

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2015

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

CCV recovered outside the upper control limits. Sample results are below the reporting limit. Data is reportable per the TNI standard.

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

STANDARD METHODS 5220 D (TOTAL) 1997, 2011

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25051581-009

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Client Sample ID: Dup 1

Collection Date: 05/15/2025 0:00

Engineering

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

25051581-001AMW01

Work Order: 25051581

Report Date: 11-Jun-25

Collection DateReceived Date

05/15/2025 10:1505/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2015

05/20/2025 11:43

05/29/2025 16:48

Standard Methods 4500-NO2 B (Total) 2000, 2011 05/16/2025 20:46

Standard Methods 4500-NO3 F (Total) 2000, 2011

05/16/2025 20:16

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:16

25051581-001BMW01

05/15/2025 10:1505/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-001CMW01

Standard Methods 2340 B, Hardness (Total) 2011

05/15/2025 10:1505/16/2025 14:40

05/19/2025 16:43

05/20/2025 0:00 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/20/2025 13:08 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/21/2025 9:45 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 06/09/2025 20:20 05/19/2025 13:34

25051581-001DMW01

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 10:1505/16/2025 14:40

05/20/2025 15:14 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 05/21/2025 11:06 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 06/09/2025 21:52 05/19/2025 13:30

25051581-001EMW01

Standard Methods 5310 C 2000, 2011, Organic Carbon

05/15/2025 10:1505/16/2025 14:40

25051581-001FMW01 05/15/2025 10:1505/16/2025 14:40

Standard Methods 5220 D (Total) 1997, 2011

25051581-002AMW02

05/15/2025 11:0505/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2015

Standard Methods 4500-NO2 B (Total) 2000, 2011

Standard Methods 4500-NO3 F (Total) 2000, 2011

25051581-002BMW02

05/15/2025 11:0505/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-002CMW02

Standard Methods 2340 B, Hardness (Total) 2011

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25051581-002DMW02

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 11:0505/16/2025 14:40

05/27/2025 17:52

05/20/2025 17:36

05/19/2025 16:05

05/29/2025 16:48

05/16/2025 20:17

05/16/2025 20:18

05/19/2025 16:55

05/20/2025 0:00 05/19/2025 13:34

05/20/2025 13:15 05/19/2025 13:34

05/21/2025 9:49 05/19/2025 13:34

06/09/2025 21:09 05/19/2025 13:34

05/20/2025 15:20 05/19/2025 13:30

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

Collection DateReceived Date

Work Order: 25051581

Report Date: 11-Jun-25

05/21/2025 11:10 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 06/09/2025 21:58 05/19/2025 13:30

25051581-002EMW02

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-002FMW02

Standard Methods 5220 D (Total) 1997, 2011

25051581-003AMW03

05/15/2025 11:0505/16/2025 14:40

05/15/2025 11:5505/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

05/27/2025 18:28

05/20/2025 17:36

05/19/2025 15:56

Standard Methods 2540 C (Total) 2015 05/29/2025 16:48

Standard Methods 4500-NO2 B (Total) 2000, 2011

05/16/2025 20:47

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:21

25051581-003BMW03 05/15/2025 11:5505/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-003CMW03

Standard Methods 2340 B, Hardness (Total) 2011

05/15/2025 11:5505/16/2025 14:40

05/19/2025 17:06

05/19/2025 13:34

05/20/2025 0:00

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/20/2025 13:21 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25051581-003DMW03

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

25051581-003EMW03

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-003FMW03

Standard Methods 5220 D (Total) 1997, 2011

25051581-004AMW04

05/15/2025 11:5505/16/2025 14:40

05/21/2025 9:54 05/19/2025 13:34

05/19/2025 13:34

05/19/2025 13:30

05/15/2025 11:5505/16/2025 14:40

05/15/2025 12:5005/16/2025 14:40

06/09/2025 21:15

05/20/2025 15:51

05/21/2025 11:15

06/09/2025 22:04 05/19/2025 13:30

05/27/2025 18:46

05/20/2025 17:36

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed 05/19/2025 16:24

Standard Methods 2540 C (Total) 2015

Standard Methods 4500-NO2 B (Total) 2000, 2011

05/29/2025 16:48

05/16/2025 18:40

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:23

25051581-004BMW04

05/15/2025 12:5005/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-004CMW04

05/15/2025 12:5005/16/2025 14:40

05/19/2025 17:18

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID Collection DateReceived Date

Test Name

Standard Methods 2340 B, Hardness (Total) 2011

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25051581-004DMW04

05/15/2025 12:5005/16/2025 14:40

Work Order: 25051581

Report Date: 11-Jun-25

05/19/2025 13:34

05/20/2025 0:00

05/20/2025 13:33 05/19/2025 13:34

05/22/2025 10:35 05/19/2025 13:34

06/09/2025 20:26 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 05/20/2025 15:57 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

25051581-004EMW04 05/15/2025 12:5005/16/2025 14:40

05/21/2025 11:19 05/19/2025 13:30

06/09/2025 22:35 05/19/2025 13:30

Standard Methods 5310 C 2000, 2011, Organic Carbon 05/27/2025 19:28

25051581-004FMW04

Standard Methods 5220 D (Total) 1997, 2011

05/15/2025 12:5005/16/2025 14:40

25051581-005AMW-5 05/15/2025 11:2005/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

05/20/2025 17:36

05/21/2025 15:01

Standard Methods 2540 C (Total) 2015 05/29/2025 16:48

Standard Methods 4500-NO2 B (Total) 2000, 2011

Standard Methods 4500-NO3 F (Total) 2000, 2011

05/20/2025 20:12

05/16/2025 20:25

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:25

25051581-005BMW-5

05/15/2025 11:2005/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-005CMW-5

Standard Methods 2340 B, Hardness (Total) 2011

SW-846 3005A, 6020A, Metals by ICPMS (Total)

05/15/2025 11:2005/16/2025 14:40

05/19/2025 17:29

05/20/2025 0:00 05/19/2025 13:34

05/19/2025 13:34

05/20/2025 13:27

05/21/2025 9:58 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 06/09/2025 21:21 05/19/2025 13:34

25051581-005DMW-5

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 11:2005/16/2025 14:40

05/19/2025 13:30

05/20/2025 16:35

05/22/2025 9:10 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 06/09/2025 23:05 05/19/2025 13:30

25051581-005EMW-5

05/15/2025 11:2005/16/2025 14:40

Standard Methods 5310 C 2000, 2011, Organic Carbon 05/27/2025 19:46

25051581-005FMW-5

Standard Methods 5220 D (Total) 1997, 2011

25051581-006AMW-6

05/15/2025 11:2005/16/2025 14:40

05/15/2025 9:2505/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

05/20/2025 17:34

05/19/2025 15:44

Standard Methods 2540 C (Total) 2015 05/29/2025 16:48

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

Standard Methods 4500-NO2 B (Total) 2000, 2011

Standard Methods 4500-NO3 F (Total) 2000, 2011

Dates Report

Work Order: 25051581 http://www.teklabinc.com/

Report Date: 11-Jun-25

Collection DateReceived Date

05/16/2025 18:40

05/16/2025 20:33

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:33

25051581-006BMW-6

05/15/2025 9:2505/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-006CMW-6 05/15/2025 9:2505/16/2025 14:40

Standard Methods 2340 B, Hardness (Total) 2011

SW-846 3005A, 6020A, Metals by ICPMS (Total)

05/19/2025 18:04

05/20/2025 0:00 05/19/2025 13:34

05/20/2025 14:49 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 06/09/2025 21:28 05/19/2025 13:34

25051581-006DMW-6 05/15/2025 9:2505/16/2025 14:40

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

25051581-006EMW-6

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-006FMW-6

Standard Methods 5220 D (Total) 1997, 2011

25051581-007AMW-7

05/15/2025 9:2505/16/2025 14:40

05/15/2025 9:0005/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2015

Standard Methods 4500-NO2 B (Total) 2000, 2011

Standard Methods 4500-NO3 F (Total) 2000, 2011

05/20/2025 16:04 05/19/2025 13:30

06/11/2025 9:59 05/19/2025 13:30

05/27/2025 20:04

05/20/2025 17:36

05/19/2025 15:46

05/29/2025 16:48

05/16/2025 20:09

05/16/2025 20:49

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:49

25051581-007BMW-7

05/15/2025 9:0005/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography 05/19/2025 18:16

25051581-007CMW-7

Standard Methods 2340 B, Hardness (Total) 2011

SW-846 3005A, 6020A, Metals by ICPMS (Total)

05/15/2025 9:0005/16/2025 14:40

05/20/2025 0:00 05/22/2025 8:48

05/20/2025 14:55 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/22/2025 15:45 05/22/2025 8:48

SW-846 3005A, 6020A, Metals by ICPMS (Total) 06/09/2025 21:34 05/19/2025 13:34

25051581-007DMW-7

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 9:0005/16/2025 14:40

05/20/2025 16:10 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 06/11/2025 8:33 05/19/2025 13:30

25051581-007EMW-7

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-007FMW-7

05/15/2025 9:0005/16/2025 14:40

05/27/2025 20:22

Standard Methods 5220 D (Total) 1997, 2011 05/20/2025 17:37

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

25051581-008AMW-8

Work Order: 25051581

Report Date: 11-Jun-25

Collection DateReceived Date

05/15/2025 10:0005/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2015

05/19/2025 15:53

05/29/2025 16:48

Standard Methods 4500-NO2 B (Total) 2000, 2011 05/16/2025 20:09

Standard Methods 4500-NO3 F (Total) 2000, 2011

05/16/2025 20:52

Standard Methods 4500-NO3 F (Total) 2000, 2011 05/16/2025 20:52

25051581-008BMW-8

05/15/2025 10:0005/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-008CMW-8

Standard Methods 2340 B, Hardness (Total) 2011

05/15/2025 10:0005/16/2025 14:40

05/19/2025 19:03

05/20/2025 0:00 05/22/2025 8:48

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/20/2025 15:01 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/22/2025 15:51 05/22/2025 8:48

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25051581-008DMW-8

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 10:0005/16/2025 14:40

06/09/2025 21:40 05/19/2025 13:34

05/20/2025 16:16 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 06/09/2025 22:53 05/19/2025 13:30

25051581-008EMW-8

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-008FMW-8

Standard Methods 5220 D (Total) 1997, 2011

25051581-009ADup 1

05/15/2025 10:0005/16/2025 14:40

05/15/2025 0:0005/16/2025 14:40

Standard Method 4500-H B 2000, 2011, Laboratory Analyzed

05/27/2025 20:40

05/20/2025 17:37

05/19/2025 15:47

Standard Methods 2540 C (Total) 2015 05/29/2025 16:48

Standard Methods 4500-NO2 B (Total) 2000, 2011 05/16/2025 20:10

Standard Methods 4500-NO3 F (Total) 2000, 2011

25051581-009BDup 1

05/15/2025 0:0005/16/2025 14:40

SW846 9056A Total Anionic Compounds by Ion Chromatography

25051581-009CDup 1

Standard Methods 2340 B, Hardness (Total) 2011

05/15/2025 0:0005/16/2025 14:40

05/16/2025 20:54

05/19/2025 19:14

05/20/2025 0:00 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total) 05/20/2025 15:07 05/19/2025 13:34

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25051581-009DDup 1

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

05/15/2025 0:0005/16/2025 14:40

05/21/2025 11:01 05/19/2025 13:34

06/09/2025 21:46 05/19/2025 13:34

05/20/2025 16:22 05/19/2025 13:30

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 05/21/2025 12:17 05/19/2025 13:30

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID Collection DateReceived Date

Test Name

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

25051581-009EDup 1

Standard Methods 5310 C 2000, 2011, Organic Carbon

25051581-009FDup 1

Standard Methods 5220 D (Total) 1997, 2011

05/15/2025 0:0005/16/2025 14:40

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

06/09/2025 22:59 05/19/2025 13:30

05/27/2025 21:22

05/20/2025 17:37

STANDARD METHOD 4500-H B 2000, 2011, LABORATORY ANALYZED

SampType:

SampID:

STANDARD METHODS 2540 C (TOTAL) 2015

SampID: MBLK

SampID:

STANDARD METHODS 2540 C (TOTAL) 2015

Quality

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

SampID:

Client Project: 25491019.01

Quality Control Results

http://www.teklabinc.com/

Client: Barr Engineering Company Report Date: 11-Jun-25

STANDARD METHODS 4500-NO2 B (TOTAL) 2000, 2011

R365123 Batch

SampID: 25051581-009AMSD

Batch

SampID: MBLK

Batch

STANDARD METHODS 4500-NO3 F (TOTAL) 2000, 2011

Work Order: 25051581

Quality Control

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SampID:

STANDARD METHODS 5310 C 2000, 2011, ORGANIC CARBON

SampID: MBLK/ICB SampType: MBLK

Quality

SampID: 25051581-005BMSD

Quality Control Results

Receiving Check List

Client: Barr Engineering Company

Client Project: 25491019.01

Carrier: Crossroads

Completed by:

http://www.teklabinc.com/

Work Order: 25051581

Report Date: 11-Jun-25

Received By: LEH

Reviewed by: On: 16-May-25 On: 16-May-25

Dilallo Ellie Hopkins

Chain of custody 1 Extra pages included 0

Shipping container/cooler in good condition? Yes No Not Present

Type of thermal preservation?

Chain of custody present? Yes No

Chain of custody signed when relinquished and received? Yes No

Chain of custody agrees with sample labels? Yes No

Samples in proper container/bottle? Yes No

Sample containers intact?

Yes No

Sufficient sample volume for indicated test? Yes No

All samples received within holding time?

Yes No

Reported field parameters measured: Field Lab

Sample analyses to be measured in the field and/or within 15 minutes of collection were analyzed in the lab as soon as practicable. These analyses include Chlorine (demand, free and/or residual), Carbon Dioxide, Dissolved Oxygen, Ferrous Iron, pH, and Sulfite.

Container/Temp Blank temperature in compliance?

Yes No

When thermal preservation is required, samples are compliant with a temperature between 0.1°C - 6.0°C, or when samples are received on ice the same day as collected.

Water – at least one vial per sample has zero headspace? Yes No No VOA vials

Water - TOX containers have zero headspace?

Water - pH acceptable upon receipt? Yes No

NPDES/CWA TCN interferences checked/treated in the field?

Custody seal(s) intact on shipping container/cooler. - LH/amberdilallo - 5/16/2025 3:56:19 PM pH strip #101358. - JD/amberdilallo - 5/16/2025 3:56:21 PM

Samples were filtered and preserved with Nitric Acid (103505) for the dissolved parameters upon arrival at the laboratory. - amberdilallo - 5/16/2025 3:58:36 PM

Amber

October 16, 2025

Cameron Dulle Barr Engineering Company

1001 Diamond Ridge Suite 1100

http://www.teklabinc.com/

Illinois100226

Illinois1004652024-2

KansasE-10438

KansasE-10374

Louisiana05002

Louisiana05003

Oklahoma9978

TEL: FAX:

Jefferson City, MO 65109 (952) 832-2893 (573) 638-5001

25491019.01 RE:

Dear Cameron Dulle:

WorkOrder: 25100572

TEKLAB, INC received 9 samples on 10/8/2025 10:54:00 AM for the analysis presented in the following report.

If you have any questions regarding these tests results, please feel free to call.

Sincerely,

Paul Schultz Project Manager Pschultz@teklabinc.com

Definitions

Client: Barr Engineering Company

Client Project: 25491019.01

AbbrDefinition

*Analytes on report marked with an asterisk are not NELAP accredited

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

CCVContinuing calibration verification is a check of a standard to determine the state of calibration of an instrument between recalibration.

CRQLA Client Requested Quantitation Limit is a reporting limit that varies according to customer request. The CRQL may not be less than the MDL.

DNIDid not ignite

DUPLaboratory duplicate is a replicate aliquot prepared under the same laboratory conditions and independently analyzed to obtain a measure of precision.

ICVInitial calibration verification is a check of a standard to determine the state of calibration of an instrument before sample analysis is initiated.

IDPHIL Dept. of Public Health

MWMolecular weight

NCData is not acceptable for compliance purposes

NDNot Detected at the Reporting Limit

NELAPNELAP Accredited

PQLPractical quantitation limit means the lowest level that can be reliably achieved within specified limits of precision and accuracy during routine laboratory operation conditions.

RPDRelative percent difference is a calculated difference between two recoveries (ie. MS/MSD). The acceptable recovery limit is listed in the QC Package (provided upon request).

SPKThe spike is a known mass of target analyte added to a blank sample or sub-sample; used to determine recovery deficiency or for other quality control purposes.

SurrSurrogates are compounds which are similar to the analytes of interest in chemical composition and behavior in the analytical process, but which are not normally found in environmental samples.

TNTCToo numerous to count ( > 200 CFU )

Client: Barr Engineering Company

Client Project: 25491019.01

# - Unknown hydrocarbon

C - RL shown is a Client Requested Quantitation Limit

H - Holding times exceeded

J - Analyte detected below quantitation limits

ND - Not Detected at the Reporting Limit

S - Spike Recovery outside recovery limits

X - Value exceeds Maximum Contaminant Level

Definitions

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Qualifiers

B - Analyte detected in associated Method Blank

E - Value above quantitation range

I - Associated internal standard was outside method criteria

M - Manual Integration used to determine area response

R - RPD outside accepted recovery limits

T - TIC(Tentatively identified compound)

Client: Barr Engineering Company

Client Project: 25491019.01

Cooler Receipt Temp: 5.1 °C

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Collinsville

5445 Horseshoe Lake Road

Collinsville, IL 62234-7425 (618) 344-1004 (618) 344-1005

jhriley@teklabinc.com

Collinsville Air

5445 Horseshoe Lake Road Collinsville, IL 62234-7425 (618) 344-1004 (618) 344-1005

EHurley@teklabinc.com

Locations

Springfield 3920 Pintail Dr Springfield, IL 62711-9415 (217) 698-1004 (217) 698-1005

KKlostermann@teklabinc.com

Chicago

1319 Butterfield Rd. Downers Grove, IL 60515 (630) 324-6855

arenner@teklabinc.com

Kansas City 8421 Nieman Road Lenexa, KS 66214 (913) 541-1998 (913) 541-1998

jhriley@teklabinc.com

Accreditations

Client Project: 25491019.01

Client: Barr Engineering Company Report Date: 16-Oct-25

State

Dept

Work Order: 25100572

http://www.teklabinc.com/ NELAP

Illinois 100226 1/31/2026 Collinsville NELAP IEPA

Illinois 1004652024-2 4/30/2026 Collinsville NELAP IEPA

Kansas E-10438 7/31/2026 Collinsville NELAP KDHE

Kansas E-10374 4/30/2026 Collinsville NELAP KDHE

Louisiana 05002 6/30/2026 Collinsville NELAP LDEQ

Louisiana 05003 6/30/2026 Collinsville NELAP LDEQ

Oklahoma 9978 8/31/2025 Collinsville NELAP ODEQ

Arkansas 88-0966 3/14/2026 Collinsville ADEQ

Illinois 17584 5/31/2025 Collinsville IDPH

Iowa 430 6/1/2026 Collinsville IDNR

KWLCP Kentucky

KWLCP

Kentucky 0073 1/31/2026 Collinsville UST

Mississippi 4/30/2026 Collinsville MSDH

Missouri 930 1/31/2028 Collinsville MDNR

Missouri 00930 10/31/2026 Collinsville MDNR

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-001 Client Sample ID: MW1

Matrix: GROUNDWATER

STANDARD METHOD 4500-H B 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

Collection Date: 10/07/2025 9:10

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-001 Client Sample ID: MW1

Matrix: GROUNDWATER

Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 9:10

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard. Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-002 Client Sample ID: MW2A

Matrix: GROUNDWATER

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

METHODS 5310 C 2011, ORGANIC

SW846

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

Collection Date: 10/07/2025 11:45

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard. SW-846

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-002 Client Sample ID: MW2A Matrix: GROUNDWATER

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 11:45

Matrix spike control limits for Ca are not applicable due to high sample/spike ratio.

Matrix spike control limits for Fe are not applicable due to high sample/spike ratio.

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-003

Matrix: GROUNDWATER

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

METHODS 5310 C 2011, ORGANIC

Laboratory Results

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

Client Sample ID: MW3

Collection Date: 10/07/2025 12:45

Matrix spike control limits for Ca, Mg, and Na are not applicable due to high sample/spike ratio.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-003 Client Sample ID: MW3

Matrix: GROUNDWATER

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 12:45

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-004 Client Sample ID: MW4

Matrix: GROUNDWATER

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC

SW846 9056A

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

Collection Date: 10/07/2025 13:35

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard. SW-846

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-004 Client Sample ID: MW4

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 13:35

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-005 Client Sample ID: MW5

Matrix: GROUNDWATER

STANDARD METHOD 4500-H B 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC CARBON

SW846 9056A

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 11:00

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-005

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: MW5

Collection Date: 10/07/2025 11:00

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard. Contamination present in the CCB for Li. Sample results below the reporting limit are reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-006 Client Sample ID: MW6

Matrix: GROUNDWATER

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

METHODS 5310 C 2011, ORGANIC

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 9:20

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-006

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: MW6

Collection Date: 10/07/2025 9:20

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-007

Matrix: GROUNDWATER

Laboratory Results

STANDARD METHOD 4500-H B 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC CARBON

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: MW7

Collection Date: 10/07/2025 8:55

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-007

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: MW7

Collection Date: 10/07/2025 8:55

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Laboratory Results

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-008 Client Sample ID: MW8

Matrix: GROUNDWATER

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC CARBON

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Collection Date: 10/07/2025 9:40

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-008

Matrix: GROUNDWATER

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Laboratory Results

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: MW8

Collection Date: 10/07/2025 9:40

Sample result(s) for Na exceed 10 times the method blank contamination. Data is reportable per the TNI Standard.

Sample result(s) for Li exceed 10 times the CCB. Data is reportable per the TNI Standard.

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-009

Matrix: GROUNDWATER

Laboratory Results

STANDARD METHOD 4500-H B 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2020

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

STANDARD METHODS 5310 C 2011, ORGANIC CARBON

SW846 9056A

STANDARD METHODS 2340 B, HARDNESS (TOTAL) 2021

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: Dup 1

Collection Date: 10/07/2025 0:00

Client: Barr Engineering Company

Client Project: 25491019.01

Lab ID: 25100572-009

Matrix: GROUNDWATER

Laboratory Results

http://www.teklabinc.com/ Analyses

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Work Order: 25100572

Report Date: 16-Oct-25

Client Sample ID: Dup 1

Collection Date: 10/07/2025 0:00

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

25100572-001AMW1

Standard Method 4500-H B 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2020

Collection DateReceived Date

10/07/2025 9:1010/08/2025 10:54

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

10/13/2025 11:56

10/09/2025 13:10

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:09

Standard Methods 4500-NO3 F (Total) 2019

10/08/2025 18:49

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 18:49

25100572-001BMW1

10/07/2025 9:1010/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-001CMW1 10/07/2025 9:1010/08/2025 10:54

Standard Methods 2340 B, Hardness (Total) 2021

10/08/2025 23:19

10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/10/2025 13:28 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 11:55 10/08/2025 14:16

25100572-001DMW1 10/07/2025 9:1010/08/2025 10:54

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/10/2025 15:02 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:03 10/08/2025 13:53

25100572-001EMW1 10/07/2025 9:1010/08/2025 10:54

Standard Methods 5310 C 2011, Organic Carbon

25100572-001FMW1

Standard Methods 5220 D (Total) 2011

10/07/2025 9:1010/08/2025 10:54

25100572-002AMW2A 10/07/2025 11:4510/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed

Standard Methods 2540 C (Total) 2020

Standard Methods 4500-NO2 B (Total) 2021

Standard Methods 4500-NO3 F (Total) 2019

25100572-002BMW2A

10/07/2025 11:4510/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-002CMW2A

Standard Methods 2340 B, Hardness (Total) 2021

SW-846 3005A, 6020A, Metals by ICPMS (Total)

10/07/2025 11:4510/08/2025 10:54

10/09/2025 12:32

10/10/2025 11:09

10/13/2025 11:58

10/09/2025 13:10

10/08/2025 22:09

10/08/2025 18:52

10/09/2025 0:06

10/13/2025 0:00 10/08/2025 14:16

10/10/2025 13:34 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 10:23 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25100572-002DMW2A

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 11:4510/08/2025 10:54

10/14/2025 10:46 10/08/2025 14:16

10/10/2025 15:08 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:09 10/08/2025 13:53

25100572-002EMW2A

10/07/2025 11:4510/08/2025 10:54

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID Collection DateReceived Date

Test Name

Standard Methods 5310 C 2011, Organic Carbon

25100572-002FMW2A

10/07/2025 11:4510/08/2025 10:54

Work Order: 25100572

Report Date: 16-Oct-25

10/09/2025 13:08

Standard Methods 5220 D (Total) 2011 10/10/2025 11:09

25100572-003AMW3 10/07/2025 12:4510/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed

10/13/2025 11:36

Standard Methods 2540 C (Total) 2020 10/09/2025 13:10

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:10

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 18:54

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 18:54 25100572-003BMW3 10/07/2025 12:4510/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-003CMW3

Standard Methods 2340 B, Hardness (Total) 2021

10/07/2025 12:4510/08/2025 10:54

10/09/2025 0:41

10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/10/2025 14:18 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 10:18 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:01 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/15/2025 10:16 10/08/2025 14:16

25100572-003DMW3

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 12:4510/08/2025 10:54

10/10/2025 16:24 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:37 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/15/2025 10:24 10/08/2025 13:53

25100572-003EMW3 10/07/2025 12:4510/08/2025 10:54

Standard Methods 5310 C 2011, Organic Carbon

25100572-003FMW3

Standard Methods 5220 D (Total) 2011

25100572-004AMW4

Standard Method 4500-H B 2011, Laboratory Analyzed

10/07/2025 12:4510/08/2025 10:54

10/07/2025 13:3510/08/2025 10:54

10/09/2025 13:26

10/10/2025 11:10

10/13/2025 11:37

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:10

Standard Methods 4500-NO3 F (Total) 2019

10/08/2025 18:56

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 18:56

25100572-004BMW4

10/07/2025 13:3510/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-004CMW4 10/07/2025 13:3510/08/2025 10:54

Standard Methods 2340 B, Hardness (Total) 2021

10/09/2025 0:52

10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/10/2025 14:24 10/08/2025 14:16

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

SW-846 3005A, 6020A, Metals by ICPMS (Total)

Dates Report

Work Order: 25100572

Report Date: 16-Oct-25

Collection DateReceived Date

10/14/2025 10:12 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:06 10/08/2025 14:16

25100572-004DMW4

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 13:3510/08/2025 10:54

10/10/2025 15:14 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:15 10/08/2025 13:53

25100572-004EMW4

Standard Methods 5310 C 2011, Organic Carbon

10/07/2025 13:3510/08/2025 10:54

25100572-004FMW4 10/07/2025 13:3510/08/2025 10:54

10/09/2025 13:44

Standard Methods 5220 D (Total) 2011 10/10/2025 11:10

25100572-005AMW5

Standard Method 4500-H B 2011, Laboratory Analyzed

10/07/2025 11:0010/08/2025 10:54

10/13/2025 11:44

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:11

Standard Methods 4500-NO3 F (Total) 2019

10/08/2025 19:11

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:11

25100572-005BMW5

10/07/2025 11:0010/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-005CMW5 10/07/2025 11:0010/08/2025 10:54

Standard Methods 2340 B, Hardness (Total) 2021

SW-846 3005A, 6020A, Metals by ICPMS (Total)

10/09/2025 1:04

10/13/2025 0:00 10/08/2025 14:16

10/10/2025 14:31 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:12 10/08/2025 14:16

25100572-005DMW5

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 11:0010/08/2025 10:54

10/10/2025 15:46 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:20 10/08/2025 13:53

25100572-005EMW5

Standard Methods 5310 C 2011, Organic Carbon

10/07/2025 11:0010/08/2025 10:54

25100572-005FMW5 10/07/2025 11:0010/08/2025 10:54

10/13/2025 12:57

Standard Methods 5220 D (Total) 2011 10/10/2025 11:10

25100572-006AMW6

10/07/2025 9:2010/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed 10/13/2025 12:20

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:14

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:13

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:13 25100572-006BMW6

10/07/2025 9:2010/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography 10/09/2025 1:16

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID Collection DateReceived Date

Test Name

25100572-006CMW6

Standard Methods 2340 B, Hardness (Total) 2021

SW-846 3005A, 6020A, Metals by ICPMS (Total)

10/07/2025 9:2010/08/2025 10:54

Work Order: 25100572

Report Date: 16-Oct-25

10/13/2025 0:00 10/08/2025 14:16

10/10/2025 14:37 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:18 10/08/2025 14:16

25100572-006DMW6

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 9:2010/08/2025 10:54

10/10/2025 15:52 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:26 10/08/2025 13:53

25100572-006EMW6

Standard Methods 5310 C 2011, Organic Carbon

10/07/2025 9:2010/08/2025 10:54

25100572-006FMW6 10/07/2025 9:2010/08/2025 10:54

10/09/2025 14:44

Standard Methods 5220 D (Total) 2011 10/10/2025 11:10

25100572-007AMW7

10/07/2025 8:5510/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed 10/13/2025 11:51

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021

10/08/2025 22:14

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:15

25100572-007BMW7

10/07/2025 8:5510/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-007CMW7 10/07/2025 8:5510/08/2025 10:54

10/09/2025 1:27

Standard Methods 2340 B, Hardness (Total) 2021 10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total)

10/10/2025 14:43 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:23 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total)

25100572-007DMW7 10/07/2025 8:5510/08/2025 10:54

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/15/2025 10:20 10/08/2025 14:16

10/10/2025 15:59 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 13:32 10/08/2025 13:53

25100572-007EMW7

10/07/2025 8:5510/08/2025 10:54

Standard Methods 5310 C 2011, Organic Carbon 10/09/2025 15:02

25100572-007FMW7

10/07/2025 8:5510/08/2025 10:54

Standard Methods 5220 D (Total) 2011 10/10/2025 11:11

25100572-008AMW8 10/07/2025 9:4010/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed

10/13/2025 12:19

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:14

Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:17

Dates Report

Client: Barr Engineering Company

Client Project: 25491019.01

Sample IDClient Sample ID

Test Name

Standard Methods 4500-NO3 F (Total) 2019

25100572-008BMW8

Collection DateReceived Date

Work Order: 25100572 http://www.teklabinc.com/

Report Date: 16-Oct-25

10/07/2025 9:4010/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-008CMW8 10/07/2025 9:4010/08/2025 10:54

Standard Methods 2340 B, Hardness (Total) 2021

10/08/2025 19:17

10/09/2025 1:39

10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/10/2025 14:49 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:29 10/08/2025 14:16

25100572-008DMW8

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved)

10/07/2025 9:4010/08/2025 10:54

10/10/2025 16:05 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 14:46 10/08/2025 13:53

25100572-008EMW8

10/07/2025 9:4010/08/2025 10:54

Standard Methods 5310 C 2011, Organic Carbon 10/09/2025 15:20 25100572-008FMW8 10/07/2025 9:4010/08/2025 10:54

Standard Methods 5220 D (Total) 2011 10/10/2025 11:11

25100572-009ADup 1

10/07/2025 0:0010/08/2025 10:54

Standard Method 4500-H B 2011, Laboratory Analyzed 10/13/2025 12:04

Standard Methods 2540 C (Total) 2020 10/09/2025 13:22

Standard Methods 4500-NO2 B (Total) 2021 10/08/2025 22:14 Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:20 Standard Methods 4500-NO3 F (Total) 2019 10/08/2025 19:20

25100572-009BDup 1

10/07/2025 0:0010/08/2025 10:54

SW846 9056A Total Anionic Compounds by Ion Chromatography

25100572-009CDup 1

10/09/2025 1:51

10/07/2025 0:0010/08/2025 10:54

Standard Methods 2340 B, Hardness (Total) 2021 10/13/2025 0:00 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/10/2025 14:56 10/08/2025 14:16

SW-846 3005A, 6020A, Metals by ICPMS (Total) 10/14/2025 12:58 10/08/2025 14:16

25100572-009DDup 1

10/07/2025 0:0010/08/2025 10:54

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/10/2025 16:11 10/08/2025 13:53

SW-846 3005A, 6020A, Metals by ICPMS (Dissolved) 10/14/2025 14:51 10/08/2025 13:53

25100572-009EDup 1

10/07/2025 0:0010/08/2025 10:54

Standard Methods 5310 C 2011, Organic Carbon 10/09/2025 15:38

25100572-009FDup 1

10/07/2025 0:0010/08/2025 10:54

Standard Methods 5220 D (Total) 2011 10/10/2025 11:11

Quality Control Results

STANDARD METHOD 4500-H B 2011, LABORATORY ANALYZED

STANDARD METHODS 2540 C (TOTAL) 2020

SampID: MBLK

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

SampID: MBLK

Client Project: 25491019.01 Client:

Quality Control Results

Engineering Company Report Date: 16-Oct-25 Work Order: 25100572 http://www.teklabinc.com/

STANDARD METHODS 4500-NO2 B (TOTAL) 2021

Batch

SampID: LCS

STANDARD METHODS 4500-NO3 F (TOTAL) 2019

STANDARD METHODS 5220 D (TOTAL) 2011

Quality

STANDARD METHODS 5310 C 2011, ORGANIC CARBON

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION

R372637 Batch

SampID: MBLK/ICB SampType: MBLK

CHROMATOGRAPHY

SampID:

Quality Control Results

SW846 9056A TOTAL ANIONIC COMPOUNDS BY ION CHROMATOGRAPHY

SampID: 25100572-002BMS SampType:

SW-846 3005A, 6020A, METALS BY ICPMS (DISSOLVED)

SampID:

Quality Control Results

SW-846 3005A, 6020A, METALS BY ICPMS (TOTAL)

Quality Control Results

Receiving Check List

Client: Barr Engineering Company

Client Project: 25491019.01

Received By: DIM Carrier: VIA

Completed by:

Reviewed by: On: 08-Oct-25 On: 08-Oct-25

Emily Kossakoski

Chain of custody 1 Extra pages included 0

Paul Schultz

http://www.teklabinc.com/

Work Order: 25100572

Report Date: 16-Oct-25

Shipping container/cooler in good condition? Yes No Not Present

Type of thermal preservation? None Ice Blue Ice Dry Ice

Chain of custody present? Yes No

Chain of custody signed when relinquished and received? Yes No

Chain of custody agrees with sample labels? Yes No

Samples in proper container/bottle?

Sample containers intact?

Sufficient sample volume for indicated test?

All samples received within holding time?

Yes No

Reported field parameters measured: Field Lab NA

Container/Temp Blank temperature in compliance?

Yes No

When thermal preservation is required, samples are compliant with a temperature between 0.1°C - 6.0°C, or when samples are received on ice the same day as collected.

Water – at least one vial per sample has zero headspace? Yes No No VOA vials

Water - TOX containers have zero headspace? No TOX containers Yes No

Water - pH acceptable upon receipt? Yes No NA

NPDES/CWA TCN interferences checked/treated in the field? Yes No NA

Custody seal(s) intact on shipping container/cooler. - DM/ekossakoski - 10/8/2025 1:15:17 PM pH strip #104524. - DM/ekossakoski - 10/8/2025 1:15:20 PM

Samples were filtered and preserved with nitric acid (106426) for the dissolved parameters upon arrival at the laboratory. - ekossakoski - 10/8/2025 1:15:23 PM

Additional cooler temperature 3.5C. EK 10/8/2025