DERR-2024-004280

195 North 1950 West
Mailing Address: P.O. Box 144840 Salt Lake City, UT 84114-4840
Telephone [phone] ) 359-8853 [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor
Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF ENVIRONMENTAL
RESPONSE AND REMEDIATION

Brent H. Everett
Director
ERRC-010-24

January 23, 2024

Athena Jones
U.S. EPA, Region 8
Mail Code 8EPR-SR
1595 Wynkoop Street
Denver, Colorado 80202-1129

Dear Ms. Jones:

Please find enclosed the Midvale Slag Annual Groundwater and Surface Water Monitoring
and Sampling Report for sampling completed during May 2023. Concentrations for the
contaminants of concern in groundwater and surface water were below established action levels,
and the remedy appears to be functioning as intended.

If you have any questions concerning this report, please contact me at 801-536-4100.

Sincerely,

Tony Howes, Environmental Scientist
Division of Environmental Response and Remediation

TH/lg

Enclosure(s): Midvale Slag 2023 Groundwater Monitoring Report

ecc: Billie Smathers, Midvale City
Corbin Anderson, Salt Lake Valley Health Department (letter only)

ANNUAL GROUNDWATER AND SURFACE WATER
MONITORING AND SAMPLING REPORT
MIDVALE SLAG SUPERFUND SITE
Midvale City, Utah
May 2023

Utah Department of Environmental Quality
Division of Environmental Response and Remediation

TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................................................................................ 1 1.1 Site Description............................................................................................................................................................ 1 1.2 Hydrogeology ............................................................................................................................................................... 1 1.3 Monitoring System ..................................................................................................................................................... 1 2.0 DATA COLLECTION ......................................................................................................................................................... 2 2.1 Static Water Level Measurements ....................................................................................................................... 2 2.2 Groundwater Sampling ............................................................................................................................................ 2 2.3 Surface Water Sampling ........................................................................................................................................... 3 2.4 Quality Assurance/Quality Control ..................................................................................................................... 3 3.0 SUMMARY OF RESULTS ................................................................................................................................................ 3 3.1 Groundwater Elevations .......................................................................................................................................... 3 3.2 Field Parameters ......................................................................................................................................................... 4 3.3 Analytical Results ........................................................................................................................................................ 4 3.3.1 COC Concentrations in Upgradient Monitoring Wells ........................................................................ 4 3.3.2 COC Concentrations in Downgradient Monitoring Wells .................................................................. 5 3.3.3 COC Concentrations in Plume Core Monitoring Wells ........................................................................ 5 3.3.4 COC Concentrations in ACL Monitoring Wells ....................................................................................... 5 3.3.5 COC Concentrations in Surface Water ....................................................................................................... 5 3.4 Data Trends ................................................................................................................................................................... 5 4.0 CONCLUSIONS ................................................................................................................................................................... 6 5.0 REFERENCES ..................................................................................................................................................................... 7

LIST OF FIGURES, TABLES, AND APPENDICES
FIGURES: Figure 1: Site Location Map Figure 2: Potentiometric Surface Map for Shallow Monitoring Wells Figure 3: Dissolved Antimony Concentrations in Shallow and Intermediate Monitoring Wells Figure 4: Dissolved Arsenic Concentrations in Shallow and Intermediate Monitoring Wells Figure 5: Dissolved Cadmium Concentrations in Shallow and Intermediate Monitoring Wells Figure 6: Dissolved Selenium Concentrations in Shallow and Intermediate Monitoring Wells
TABLES: Table 1: Groundwater Elevations and Monitoring Well Survey Data Table 2: Difference in Groundwater Elevation at Monitoring Well Pairs Table 3: Summary of Field Parameters Table 4: Dissolved Metal Concentrations in Groundwater and Surface Water Table 5: Comparison of Surface Water Results to Surface Water Quality Criteria Table 6: Summary of Antimony Trends in Groundwater and Surface Water Table 7: Summary of Arsenic Trends in Groundwater and Surface Water Table 8: Summary of Cadmium Trends in Groundwater and Surface Water Table 9: Summary of Selenium Trends in Groundwater and Surface Water
APPENDICES:
Appendix A: Water Level Measurements Appendix B: Water Quality Field Parameters Appendix C: Laboratory Analytical Data Reports Appendix D: Trend Analysis Results

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 1
1.0 INTRODUCTION This report was prepared by the Utah Department of Environmental Quality, Division of Environmental Response and Remediation (UDEQ/DERR) to summarize annual groundwater and surface water monitoring/sampling performed at the Midvale Slag Superfund Site during May 2023. The goal of the monitoring and sampling event was to determine the effectiveness of the selected remedy established in the 2002 Midvale Slag Operable Unit (OU-2) Record of Decision (ROD) prepared by the U.S. Environmental Protection Agency (EPA). The remedy selected for the OU-2 ROD for groundwater did not actively attempt to restore the Upper Sand and Gravel (US&G) aquifer. Instead, the remedy established monitoring points for assessing groundwater conditions, required the implementation of institutional controls, and established alternate concentration limits (ACLs) for the US&G aquifer. The specific objectives for groundwater monitoring and sampling at the Midvale Slag Site are as follows:
• Conduct groundwater and surface water monitoring to assess if applicable groundwater and surface water quality criteria are being met for the contaminants of concern (COC) which are antimony, arsenic, cadmium, and selenium.
• Assess monitoring data and determine if contamination is moving laterally or vertically within the boundaries of the Site.
1.1 Site Description The Midvale Slag Superfund Site is located in a commercial and residential area of Midvale City, Utah. The Sharon Steel Superfund Site (UTD980951388) and Jordan River are located immediately adjacent to the Site on the south and west, respectively. The Site was historically used as a lead and copper smelting/milling facility that operated from 1871 to 1971. In addition to lead and copper, the facility produced other metals, including gold and silver. Wastes generated from the smelting/milling process were disposed of on-site and included arsenic trioxide, calcine, slag, and other smelter related waste.
1.2 Hydrogeology Groundwater at the Midvale Slag Site is comprised of three distinct hydrogeologic units: an unconfined US&G aquifer (also referred to as the shallow unconfined aquifer), a confined deep principal aquifer, and local/perched groundwater. Wastes generated and disposed of on-site contaminated the US&G aquifer primarily with arsenic.
1.3 Monitoring System The monitoring system at the Site consists of collocated wells at 14 locations, for a total of 28 wells and two surface water sampling locations (Figure 1). Each well pair consists of one shallow monitoring well screened in the upper interval of the US&G aquifer and one intermediate monitoring well screened at a lower interval within the US&G aquifer. Specific screen intervals are listed in Table 1. The monitoring system is divided into four groups and consists of upgradient, downgradient, plume core, and ACL monitoring wells. The specific objectives for each of these groups, respectively, are as follows:

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 2
• Upgradient wells are used to monitor COC concentrations upgradient of the Site and consist of six wells designated MW-503s, MW-503i, MW-504s, MW-504i, MW-505s, and MW-505i.
• Downgradient wells are used to assess downgradient and cross gradient conditions between contaminated groundwater and a municipal well operated by Murray City and consist of four wells designated MW-506s, MW-506i, MW-507s, and MW-507i.
• Plume core monitoring wells are used to assess locations known to exhibit the highest COC concentrations and consist of four wells designated MW-601s, MW-601i, MW-602s, and MW-602i.
• The ACL monitoring wells are used to assess COC concentrations prior to discharge to the Jordan River and consists of 14 wells designated MW-701s, MW-701i, MW-702s, MW-702i, MW-703s, MW-703i, MW-704s, MW-704i, MW-705s, MW-705i, MW-706s, MW-706i, MW-707s, and MW-707i.
2.0 DATA COLLECTION Field activities associated with the May 2023 groundwater monitoring and sampling event were conducted by Tony Howes, the UDEQ/DERR Project Manager. Sampling activities were conducted according to procedures outlined in the Project Plans prepared by URS in 2009. A total of 30 samples were collected during the May 2023 monitoring and sampling event. These samples consisted of two surface water samples and 28 groundwater samples.
2.1 Static Water Level Measurements Depth to groundwater from the top of each well casing was measured with an electronic water level meter and recorded on the water level measurement form (Appendix A) prior to deploying HYDRASleeve™ samplers. Depth to groundwater measurements were used in conjunction with surveyed elevations for the top of the casing at each monitoring well to determine the groundwater surface elevation (Table 1).
2.2 Groundwater Sampling Samples were collected from each monitoring well with a HYDRASleeve™ sampler according to the
HYDRASleeve™ Simple by Design Field Manual and Standard Operating Procedure: Sampling
Groundwater with a HydraSleeve (GeoInsight, 2006; 2010). HYDRASleeve™ samplers were deployed immediately following the depth to groundwater measurement taken at each monitoring well. Monitoring wells were allowed to equilibrate for a minimum of 48 hours before retrieving the HYDRASleeve™ sampler and collecting groundwater samples. The use of HYDRASleeve™ samplers eliminated the need to purge the monitoring wells and contain the purge water. Water quality field parameters (Appendix B) were measured and recorded following the collection of all samples. Water quality field parameters measured and recorded during the May 2023 monitoring and sampling event included acidity (pH), temperature, conductivity, dissolved oxygen, oxidation/reduction potential, and turbidity. Field parameters recorded for the May 2023 monitoring and sampling event are discussed in Section 3.2. Groundwater samples collected for metal analysis were filtered in the field with a new, disposable 0.45-micron filter at each sampling location, preserved with nitric acid, and placed on ice in an insulated cooler and prepared for shipping. All samples were shipped to Bonner Analytical Testing Company in Hattiesburg, Mississippi as specified by the EPA Contract Laboratory Program (CLP).

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 3
2.3 Surface Water Sampling Surface water samples were collected from the Jordan River using a wide mouth plastic container attached to a 6-foot pole. The samples were collected as far from the bank as possible by submerging the plastic container beneath the water surface. Surface water samples were filtered in the field with a new 0.45-micron disposable filter at each location and preserved with nitric acid. Surface water samples were placed on ice in an insulated cooler and prepared for shipping. All surface water samples were shipped to Bonner Analytical Testing Company in Hattiesburg, Mississippi for metals analysis as specified by the EPA CLP. The streamflow recorded at the Jordan River 90th South gauging station at approximately the same time as surface water samples were collected was 135.38 cubic feet per second (cfs). Current and historic water flows for the Jordan River at the 90th South gauging station can be obtained at http://slco.org/flood-control/real-time-streamflow-totals/. Weather conditions obtained from the National Weather Service website (http://forecast.weather.gov/MapClick.php?lat=38.4494&lon=-112.2302#.WDXS-H04JfV) and recorded at the time of collecting surface water samples were mostly cloudy and 67° Fahrenheit.
2.4 Quality Assurance/Quality Control To ensure overall data quality, field activities at the Midvale Slag Site were performed according to requirements established in the Quality Assurance Program Plan for Environmental Data Operations
for the CERCLA Branch (UDEQ, 2018). The following quality assurance/control samples were collected during the May 2023 sampling event:
• A field duplicate sample was collected in conjunction with sample MW-602s.
• Samples MW-701s and SW-201 were specified as Matrix Spike (MS) samples on the inorganic traffic report. Sample documentation included the completion of all CLP forms, labels, and sample seals. Samples were handled under a strict chain-of-custody protocol. Inorganic chain-of-custody reports were prepared, signed, and placed in coolers containing samples and shipped to the designated contract laboratory.
3.0 SUMMARY OF RESULTS
3.1 Groundwater Elevations Groundwater elevations for the shallow monitoring wells ranged from 4,274.52 feet above mean sea level (amsl) at MW-703s to 4,284.24 feet amsl at MW-505s (Table 1). Elevations decrease from the southeast to the northwest indicating groundwater flow direction is towards the northwest and Jordan River. Horizontal hydraulic gradients were calculated for the site using the three point method (Heath, 1998) for two sets of well triplets. Monitoring wells MW-602s, MW-704s, and MW-707s were selected to calculate the hydraulic gradient in the southern portion of the site, and monitoring wells MW-506s, MW-507s, and MW-701s were selected to calculate the hydraulic gradient in the northern portion of the site (Figure 2).

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 4
The hydraulic gradient calculated for the southern portion of the site indicates a flow direction of 340° clockwise from North and a magnitude of 0.00503 feet/foot (ft/ft). The hydraulic gradient calculated for the northern portion of the site indicates a flow direction of 290° clockwise from the North and a magnitude of 0.00477 ft/ft. Flow directions and gradients calculated with the three point method are consistent with the groundwater contours illustrated in Figure 2. A summary of the calculated vertical hydraulic gradient and groundwater elevations is provided in Table 2 and indicates very little difference between the monitoring well pairs. Based on differences in groundwater elevations for the current sampling event it is difficult to determine the overall direction of the vertical hydraulic gradient at the Site. The DERR will continue to collect and evaluate groundwater elevation data in the future to determine, if possible, the overall direction of the vertical hydraulic gradient.
3.2 Field Parameters A summary of field parameters recorded for the May 2023 monitoring and sampling event is provided in Table 3. Field parameters were not recorded for well MW505i due to an insufficient amount of water in the HYDRASleeve™ sampler. The pH values recorded for this monitoring event ranged from 6.71 standard units at MW-507s to 8.50 standard units at MW-706i. Specific conductivity ranged from 0.998 microsiemens per centimeter (µS/cm) at MW-704i to 3.04 µS/cm at MW-505s. Groundwater temperatures recorded for this monitoring event ranged from 17.07 degrees Celsius (°C) at MW-707s to 22.72°C at MW-704s. Turbidity values ranged from zero nephelometric turbidity unit (NTU) at MW-504s, MW-504i, MW-506s, MW-506i, MW-507i, MW-601s, MW-601i, MW-701s, MW-703i, MW-704i, MW-705s, and MW-705i to 41.7 NTU at MW-507s. Oxidation/reduction potential (ORP) values ranged from -184 millivolts (mV) at MW-601i to 305 mV at MW-602i. Dissolved oxygen levels ranged from 0.03 milligrams per liter (mg/L) at MW-503i to 12.24 mg/L at MW-504i.
3.3 Analytical Results Groundwater and surface water samples collected at the Midvale Slag Site were analyzed for dissolved metals. A summary of dissolved metal concentrations for samples collected during the May 2023 monitoring and sampling event is provided in Table 4 and the laboratory analytical data packages are provided in Appendix C. Monitoring well locations and corresponding COC concentrations are illustrated in Figures 3 through 6.
3.3.1 COC Concentrations in Upgradient Monitoring Wells With the exception of monitoring well MW-505s, antimony concentrations in the upgradient monitoring wells were not detected above the sample quantitation limit of 2 micrograms per liter (µg/L). The antimony concentration detected in monitoring well MW-505s was 4.5 J+ µg/L (Table 4). With the exception of monitoring wells MW-503s and MW-505s, arsenic concentrations in the upgradient monitoring wells were not detected above the sample quantitation limit of 1 µg/L. The arsenic concentrations detected in monitoring wells MW-503s and MW-505s were 3.6 J+ µg/L and 28 J+ µg/L, respectively (Table 4). With the exception of monitoring well MW-505s, cadmium concentrations in the upgradient monitoring wells were not detected above the sample quantitation limit of 1 µg/L. The cadmium concentration detected in monitoring well MW-505s was 8 µg/L (Table 4). Selenium concentrations detected in upgradient monitoring wells ranged in concentration from 3.6 J µg/L at MW-505i to 6.2 µg/L at MW-504i (Table 4).

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 5
3.3.2 COC Concentrations in Downgradient Monitoring Wells Antimony concentrations in the downgradient monitoring wells were not detected above the sample quantitation limit of 2 µg/L (Table 4). Arsenic in the two downgradient intermediate monitoring wells (MW-506i and MW-507i) was not detected above the sample quantitation limit of 1 µg/L (Table 4). The arsenic concentrations in the two downgradient shallow monitoring wells (MW506s and MW507s) were 14 J+ µg/L (Table 4). Cadmium concentrations in the downgradient monitoring wells were not detected above the sample quantitation limit of 1 µg/L (Table 4). Selenium concentrations detected in downgradient monitoring wells ranged in concentration from 3.7 J µg/L at monitoring well MW-507i to 4 J µg/L at monitoring well MW-506i (Table 4).
3.3.3 COC Concentrations in Plume Core Monitoring Wells Antimony concentrations detected in the plume core monitoring wells ranged from 7.8 J+ µg/L at MW-601s to 16 J+ µg/L at MW-602s (Table 4). Arsenic concentrations detected in the plume core monitoring wells were higher for samples collected from the shallow monitoring wells than samples collected from the intermediate monitoring wells. Arsenic concentrations detected in the plume core monitoring wells ranged from 48 J+ µg/L at MW-602i to 4,000 µg/L at MW-601s (Table 4). With the exception of monitoring well MW-601s, cadmium concentrations in the plume core monitoring wells were not detected above the sample quantitation limit of 1 µg/L. The cadmium concentration detected in monitoring well MW-601s was 460 µg/L (Table 4). Selenium concentrations in the plume core monitoring wells ranged from 8.1 µg/L at MW-602i to 34 µg/L at MW-602s (Table 4).
3.3.4 COC Concentrations in ACL Monitoring Wells A comparison summary of the analytical results for COC concentrations in samples collected from the ACL monitoring wells to established ACLs is provided in Table 4. Antimony concentrations in the ACL monitoring wells were detected above the sample quantitation limit of 2 µg/L at four locations. Antimony concentrations for monitoring wells MW-701s, MW-703s, MW-705s, and MW-706s, were 0.72 J µg/L, 2.2 J+ µg/L, 2 J+ µg/L, and 53 J+ µg/L, respectively and did not exceed the established ACL for antimony of 380 µg/L (Table 4). Arsenic values were greater in the shallow ACL monitoring wells as compared to arsenic values in the intermediate ACL monitoring wells. Arsenic concentrations detected in the ACL monitoring wells did not exceed the established arsenic ACL of 7,000 µg/L and concentrations ranged from 0.62 J µg/L in monitoring well MW-704i to 2,800 µg/L at MW-703s (Table 4). Detected cadmium concentrations ranged from 0.11 J µg/L at MW-705i to 0.99 J µg/L at MW-706s and did not exceed the established cadmium ACL value of 1,560 µg/L (Table 4). Selenium concentrations detected in the ACL monitoring wells ranged from 2.1 J µg/L at MW-707s to 49 µg/L at MW-706s and did not exceed the established selenium ACL of 900 µg/L (Table 4).
3.3.5 COC Concentrations in Surface Water A comparison summary of COC concentrations detected in surface water samples collected from the Jordan River to the established surface water quality criteria for the Jordan River is provided in Table 5. Metal concentrations detected in surface water samples did not exceed established surface water quality criteria for the Jordan River.
3.4 Data Trends COC concentration trends were evaluated with the Mann-Kendall non-parametric statistical test for trend even though no exceedances of the ACL values were observed in the ACL monitoring wells. The evaluation of contaminant trends was completed with a free spreadsheet based software tool

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 6
obtained from GSI (GSI, 2012). The results of the GSI statistical trend evaluation are provided in Appendix D. A summary of the COC trends in each monitoring well and COC trends in the surface water are provided in Tables 6 through 9. Analytical data for groundwater and surface water samples collected from October 2014 to May 2023 were used to perform the statistical test for trends. Analytical data that were reported as non-detect were assigned a common value less than the smallest measured value in the data set as suggested in the EPA guidance document Statistical Analysis of Groundwater Monitoring Data at
RCRA Facilities Unified Guidance (EPA, 2009). A confidence factor of 95% was used for the trend evaluation. Strong increasing or decreasing trends are indicated as having a confidence factor greater than 95% and trends indicated as either “probably decreasing” or “probably increasing” have a confidence factor between 90% and 95%. Confidence factors less than 90% were either indicated as “no trend” or “stable”. The results of the Mann-Kendall statistical trend analysis for COC concentration trends in groundwater and COC concentration trends in surface water indicate the following:
• Antimony concentrations were indicated as having a “probably increasing” trend in monitoring well MW-505s, a decreasing trend in monitoring well MW-602s, and a “probably decreasing” trend in monitoring well MW-706s. (Table 6).
• Arsenic concentrations are increasing in monitoring wells MW-505s, MW-601s, MW-601i, MW-602i, MW-706s; “probably increasing” in MW-703s; decreasing in monitoring wells MW-504s, MW-507s, MW-602s, MW-701s, MW-701i, MW-702i, MW-704s; “probably decreasing” in monitoring wells MW-507i and MW- MW-707i (Table 7).
• Cadmium concentrations are increasing in monitoring well MW-505s; “probably increasing” in monitoring wells MW-504i, MW-506i; and “probably decreasing” in monitoring wells MW-504s and MW-507s (Table 8).
• Selenium concentrations are increasing in monitoring wells MW-505i, MW-601i; “probably increasing” in monitoring wells MW-601s, MW-706i; decreasing in monitoring well MW-701s and “probably decreasing” in monitoring wells MW-505s and MW-705i (Table 9).
4.0 CONCLUSIONS Based on the monitoring and sampling data for May 2023, the following conclusions can be made:
• Groundwater flow direction is towards the northwest and is consistent with past trends.
• COC concentrations in the ACL monitoring wells, did not exceed their respective ACL value.
• Metal concentrations in surface water did not exceed the established surface water quality criteria for the Jordan River.
• Statistical evaluation of COC concentration trends indicates that arsenic, and selenium are increasing in some ACL monitoring wells at levels below the established ACL values.
• COC concentrations in groundwater continue to be confined within the boundaries of the site. The UDEQ/DERR will continue to monitor the site on a semi-annual basis in order to identify contaminant trends and gain a better understanding of the hydrology at the Midvale Slag Site. The next monitoring and sampling event is scheduled during May 2024.

Midvale Slag Superfund Site May 2023 Groundwater and Surface Water Monitoring Report Page 7
5.0 REFERENCES GeoInsight, 2006, HYDRASleeve™ Simple by Design Field Manual, http://www.hydrasleeve.com/images/stories/support/HydraSleeve_No-Purge_manual_updated.pdf. GeoInsight, 2010, HYDRASleeve™ Simple by Design Standard Operating Procedure: Sampling Ground Water with a HydraSleeve, http://www.hydrasleeve.com/images/stories/support/HydraSleeve_SOP.pdf. GSI Environmental Inc. (GSI), 2012, GSI Mann-Kendall Toolkit for Constituent Trend Analysis Version 1, http://www.gsi-net.com/en/software/free-software/gsi-mann-kendall-toolkit.html. Heath, Ralph C., 1998, Basic Ground-Water Hydrology, U.S. Department of the Interior, U.S. Geological Survey, Water-Supply Paper 2220, 86p. Utah Department of Environmental Quality (UDEQ), 2018 Quality Assurance Program Plan for Environmental Data Operations for the CERCLA Branch, Final Plan Revision # 7; revised December 2018, 60p. United States Environmental Protection Agency (EPA), 2002, Midvale Slag Superfund Site Operable Unit 2 Midvale, Utah, Record of Decision, October 2002. United States Environmental Protection Agency (EPA), 2009, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities Unified Guidance, U.S. Environmental Protection Agency, EPA/530/R-09-007. URS Corporation (URS), 2009, Final Project Plans for Quarterly Groundwater and Surface water Monitoring Midvale Slag Superfund Site Midvale Utah, January 2009.

Figures
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700 West
7200 South
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SW-201
SW-202
MW-707sMW-707i
MW-706sMW-706i
MW-705sMW-705i
MW-704iMW-704s
MW-703sMW-703i
MW-701sMW-701i
MW-702sMW-702i
MW-601sMW-601i
MW-602sMW-602i
MW-506sMW-506i
MW-507sMW-507i
MW-505sMW-505i
MW-504sMW-504i
MW-503sMW-503i
Midvale Sl ag Superfund Site
Site Location MapMay 2023®
EXPLA NATION
Figure 1
Sit e Boundary
@A Alternate Concentration Limit (ACL) Monitoring W ell
@A Plume Core Monitoring W ell
@A Dow ngradient Monitoring W ell
@A Upgradient Monitoring W ell
!(Surface Water Sample Location
0 500 1,000 1,500 2,000FeetScale:1:7,000
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700 West
7200 South
D
D
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MW-703s
4274.52
MW-505s
4284.24
MW-707s
4280 .63
MW-504s
4282.97
MW-602 s
4281.52
MW-706 s
4279.09
MW-503s
4280.47MW-601s
4277 .33
MW-705s
4277.38
MW-704s
4275 .04
MW-702s
4274 .92
MW-701s
4274.81
MW-506s
4279 .39
MW-507s
4277.26
427 7
4 2 7 84276
4 2 7 9
4275
4274
4 2 8 1
428 2
4 2 8 0
4283
4285
4284
EXPLANATION
Figure 2
®
0 250 500 750 1,000125
Feet
Scale:1:5,000
Midvale Slag Su perfund Site
Pote ntio metric Surface Map for
Shallow Monitoring Wells
May 2023
D Groun dwater Flow Direction
@A Shallo w Mo nito ring Well
Groun dwater Elevation Contour
(Fee t above mean sea level)
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700 West
7200 South
MW-507s 2 UJ µg/L
MW-507i 2 UJ µg/L
MW-506s 2 UJ µg/L
MW-506i 2 UJ µg/L
MW-701s 0.72 J µg/L
MW-701i 2 UJ µg/L
SW-202 2 U µg/L
MW-702s 2 UJ µg/L
MW-702i 2 UJ µg/L
MW-703s 2.2 J+ µg/L
MW-703i 2 UJ µg/L
MW-704s 2 U µg/L
MW-704i 2 U µg/L
MW-503s2 UJ µg/L
MW-503i 2 UJ µg/L
MW-504s 2 UJ µg/L
MW-504i 2 UJ µg/L
MW-602s 16 J+ µg/L
MW-602i 2 UJ µg/L
MW-601s 7.8 J+ µg/L
MW-601i 2 UJ µg/L
MW-705s 2 J+ µg/L
MW-705i 2 U µg/L
MW-706s 53 J+ µg/L
MW-706i 2 U µg/L
MW-707s 2 U µg/L
MW-707i 2 U µg/L
MW-505s 4.5 J+ µg/L
MW-505i 2 UJ µg/L
SW-201 2 U µg/L
D
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4 2 7 7 4 2 7 8
4276
4275
4283
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4282
4 2 8 1
4 2 8 0
4 2 7 9
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Midvale Slag Su perfund Site
Dissolved Antimony Concentrations
in Shallow and Interme diate
Monitoring Wells
May 2023®
Note : The es ta blis hed AC L for An tim ony is 380 µg /L
EX PLAN ATION
@A Plume C ore Mo nitoring Well
@A Downgr adient Monitoring Well
@A Upgrad ie nt Mo nitorin g Well
!(Surfac e Water Sa mple Loc ation @A Alte rnate C oncen tra tion Limit (ACL ) Monitoring We ll
Groundw ater Elevation Contour
D Shallow Groun dwater Flow D ir ection
0 250 500 750 1,000Feet
Scale:1:5,500 Figure 3
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7800 South
7000 South
70
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7200 South
MW-507s 14 J+ µg/L
MW-507i 1 U µg/L
MW-506s 14 J+ µg/L
MW-506i 1 U µg/L
MW-701s 9.4 µg/L
MW-701i 1 U µg/L
SW-202 6.4 µg/L
MW-702s 12 J+ µg/L
MW-702i 1 U µg/L
MW-703s 2800 µg/L
MW-703i 1.1 J+ µg/L
MW-704s 590 µg/L
MW-704i 0.62 J µg/L
MW-503s 3.6 J+ µg/L
MW-503i 1 U µg/L
MW-504s 1 U µg/L
MW-504i 1 U µg/L
MW-602s 430 J+ µg/L
MW-602i 48 J+ µg/L
MW-601s 4000 µg/L
MW-601i 2100 µg/L
MW-705s 390 µg/L
MW-705i 74 µg/L
MW-706s 230 µg/L
MW-706i 5 µg/L
MW-707s 110 µg/L
MW-707i 1.3 µg/L
MW-505s 28 J+ µg/L
MW-505i 1 U µg/L
SW-201 5.1 µg/L
D
D
D
4279
427
8
4280
42
7
7
427
6
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4282
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4284
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7
4
4285
Midvale Slag Superfund Site
Dissolved Arsenic Concentrations
in Shallow and Intermediate
Monitoring Wells
May 2023®
Note: The established ACL for Arsenic is 7,000 µg/L
EXPLANATION
@A Plume Core Monitoring Well
@A Downgradient Monitoring Well
@A Upgradient Monitoring Well
!(Surface Water Sample Location @A Alternate Concentration Limit (ACL) Monitoring Well
Groundwater Elevation Contour
D Shallow Groundwater Flow Direction
0 250 500 750 1,000Feet
Scale:1:5,500 Figure 4
Midvale Slag Su perfund Site
Disso lved Cadmium Concentrations
in Shallow and Interme diate
Monitoring Wells
May 2023®
Note : The esta blished AC L for Cadmium is 1,560 µg /L
EXPLAN ATION
@A Plume C ore Mo nitoring Well
@A Downgr adient Monitoring Well
@A Upgrad ie nt Mo nitorin g Well
!(Surfac e Water Sa mple Loc ation @A Alte rnate C oncen tra tion Limit (ACL ) Monitoring We ll
Groundw ater Elevation Contour
D Shallow Groun dwater Flow D ir ection
0 250 500 750 1,000Feet
Scale:1:5,500 Figure 5
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
!(
!(
7 8 0 0 S o u t h
7000 South
700 West
7200 South
MW-507s 1 U µg/L
MW-507i 0.33 J µg/L
MW-506s 1 U µg/L
MW-506i 1 U µg/L
MW-701s 0.37 J µg/L
MW-701i 1 U µg/L
SW-202 0.2 U µg/L
MW-702s 1 U µg/L
MW-702i 1 U µg/L
MW-703s 1 U µg/L
MW-703i 1 U µg/L
MW-704s 0.36 J µg/L
MW-704i 1 U µg/L
MW-503s 1 U µg/L
MW-503i 1 U µg/L
MW-504s 1 U µg/L
MW-504i 1 U µg/L
MW-602s 1 U µg/L
MW-602i 1 U µg/L
MW-601s 460 µg/L
MW-601i 1 U µg/L
MW-705s 1 U µg/L
MW-705i 0.11 J µg/L
MW-706s 0.99 J µg/L
MW-706i 1 U µg/L
MW-707s 0.15 J µg/L
MW-707i 0.18 J µg/L
MW-505s 8 µg/L
MW-505i 1 U µg/L
SW-201 0.2 U µg/L
D
D
D
4 2 7 7
4 2 7 8
4276
4275
4283
4274
4282
4 2 8 1
4 2 8 0
4 2 7 9
4284
4285
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
@A
!(
!(
7 8 0 0 S o u t h
7000 South
700 West
7200 South
MW-507s 5 U µg/LMW-507i 3.7 J µg/L
MW-506s 5 U µg/LMW-506i 4 J µg/L
MW-701s 4.4 J µg/LMW-701i 5.1 µg/L
SW-202 2.1 J µg/L
MW-702s 5 U µg/LMW-702i 11 µg/L
MW-703s 25 µg/LMW-703i 6.7 µg/L
MW-704s 8.3 µg/LMW-704i 3.3 J µg/L
MW-503s 5 U µg/LMW-503i 4.1 J µg/L
MW-504s 6 µg/LMW-504i 6.2 µg/L
MW-602s 34 µg/LMW-602i 8.1 µg/L
MW-601s 22 µg/LMW-601i 18 µg/L
MW-705s 5 U µg/LMW-705i 5 U µg/L
MW-706s 49 µg/LMW-706i 3.8 J µg/L
MW-707s 2.1 J µg/LMW-707i 2.4 J µg/L
MW-505s 5 U µg/LMW-505i 3.6 J µg/L
SW-201 1.9 J µg/L
D
D
D
4277 42784276
4275
4283
4274
4282
4 2 8 1
4 2 8 0
4 2 7 9
4284
4285
Midvale Slag Superfund Site
Dissolved Sel enium Concentrations in Shallow and IntermediateMonitoring W ellsMay 2023®
Note: T he established ACL for Selenium is 900 µg/L
EXPLA NATION
@A Plume Core Monitoring W ell
@A Downgradient Monitoring W ell
@A Upgradient Monitoring W ell
!(Surface Water Sample Location @A Alternate Concentration Limit (ACL) Monitoring W ell
Groundwater Elevation ContourDShallow Groundwater Flow Direction
0 250 500 750 1,000Feet
Scale:1:5,500 Figure 6

Tables
Table 1: Groundwater Elevations and Monitoring Well Survey Data
Well ID Northing¹ Easting¹
Ground Surface
Elevation² (ft amsl)
Top of Casing
Elevation² (ft amsl)
Screen Interval
(ft btoc)
Depth to Water
(ft btoc)
Groundwater
Elevation May-2023
(ft amsl)
MW-503s 7393960.225 1526141.508 4320.906 4323.917 40.30 - 50.30 43.45 4280.467
MW-503i 7393961.524 1526146.267 4320.906 4323.863 71.20 - 81.20 42.16 4281.703
MW-504s 7393024.211 1526273.210 4344.153 4343.741 62.60 - 72.60 60.77 4282.971
MW-504i 7393023.353 1526265.430 4344.153 4343.838 101.00 - 111.00 60.90 4282.938
MW-505s 7391382.979 1524266.808 4308.810 4309.404 31.70 - 41.70 25.16 4284.244
MW-505i 7391375.753 1524267.355 4308.810 4309.114 70.30 - 80.30 24.82 4284.294
MW-506s 7395366.872 1525263.718 4292.030 4294.961 16.40 - 26.40 15.57 4279.391
MW-506i 7395362.718 1525268.645 4292.030 4295.026 47.20 - 57.20 16.27 4278.756
MW-507s 7396936.501 1525551.697 4287.400 4287.103 9.50 - 19.50 9.84 4277.263
MW-507i 7396932.948 1525557.470 4287.400 4286.902 38.30 - 48.30 9.64 4277.262
MW-601s 7393799.854 1524690.665 4307.230 4306.940 29.54 - 39.54 29.61 4277.330
MW-601i 7393800.021 1524684.456 4306.620 4306.320 60.79 - 70.79 29.01 4277.310
MW-602s 7393238.466 1525055.304 4334.192 4337.150 62.60 - 72.60 55.63 4281.520
MW-602i 7393232.551 1525056.765 4334.192 4337.271 92.90 - 102.90 55.66 4281.611
MW-701s 7395097.609 1524323.468 4287.363 4285.860 15.22 - 25.22 11.05 4274.810
MW-701i 7395093.671 1524321.935 4287.363 4285.880 47.02 - 57.02 11.02 4274.860
MW-702s 7394651.963 1524144.688 4288.970 4288.690 13.4 - 23.40 13.77 4274.920
MW-702i 7394656.930 1524146.626 4288.980 4288.710 43.71 - 53.71 13.79 4274.920
MW-703s 7394386.456 1523899.499 4285.170 4284.880 17.60 - 27.60 10.36 4274.520
MW-703i 7394380.777 1523898.249 4285.090 4284.800 47.30 - 57.30 10.24 4274.560
MW-704s 7393947.589 1523956.118 4285.620 4285.360 8.36 - 18.36 10.32 4275.040
MW-704i 7393943.297 1523956.838 4285.570 4285.260 40.96 - 50.96 10.16 4275.100
MW-705s 7393606.074 1524013.454 4288.550 4288.130 12.43 - 22.43 10.75 4277.380
MW-705i 7393604.018 1524007.264 4288.450 4288.140 43.54 - 53.54 12.05 4276.090
MW-706s 7393332.133 1523966.081 4293.660 4296.624 17.10 - 27.10 17.53 4279.094
MW-706i 7393327.166 1523961.895 4293.660 4296.586 44.20 - 54.20 17.43 4279.156
MW-707s 7392662.280 1524004.807 4292.280 4292.331 15.40 - 25.40 11.70 4280.631
MW-707i 7392663.578 1524011.597 4292.280 4292.488 39.90 - 49.90 11.97 4280.518
¹ North American Datum 1983 (NAD 83) US State Plane Coordinates, Utah Central Zone, US Foot
² North American Vertical Datum 1988 (NAVD 88)
ft - feet
amsl - above mean sea level
btoc - below top of casing
Table 2: Difference in Groundwater Elevation at Monitoring Well Pairs
Well Pair¹
Distance Between
Midpoints of
Screened Interval
(ft)²
Groundwater
Elevation Shallow
Well (ft amsl)
Groundwater
Elevation
Intermediate Well
(ft amsl)
Elevation Difference
(ft)
MW-503 29.38 4280.467 4281.703 -1.236 U 0.0421
MW-504 38.24 4282.971 4282.938 0.033 D 0.0009
MW-505 38.89 4284.244 4284.294 -0.05 U 0.0013
MW-506 30.74 4279.391 4278.756 0.635 D 0.0207
MW-507 28.83 4277.263 4277.262 0.001 D 0.00003
MW-601 30.92 4277.330 4277.310 0.020 D 0.0006
MW-602 30.18 4281.520 4281.611 -0.091 U 0.0030
MW-701 31.78 4274.810 4274.860 -0.05 U 0.0016
MW-702 30.18 4274.920 4274.920 0.000 -0.0000
MW-703 29.78 4274.520 4274.560 -0.040 U 0.0013
MW-704 32.60 4275.040 4275.100 -0.060 U 0.0018
MW-705 30.99 4277.380 4276.090 1.290 D 0.0416
MW-706 26.92 4279.094 4279.156 -0.062 U 0.0023
MW-707 24.34 4280.631 4280.518 0.113 D 0.0046
ft - feet
amsl - above mean sea level
ft/ft - feet/foot
¹Well pair refers to both the shallow and intermediate monitoring well at a given location (e.g., well pair 501 refers to 501s and 501i)
U - Upward vertical gradient
D - Downward vertical gradient
Vertical Hydraulic
Gradient (ft/ft)
²The water column length value was used to calculate the midpoint value for shallow wells in which the column length is less
than the screen interval
Table 3: Summary of Field Parameters
Well ID Date
Recorded
Temperature
(ºC)
Specific
Conductance
(µS/cm)
Dissolved
Oxygen
(mg/L)
pH (standard
units)
Oxidation/
Reduction
Potential
(mV)
Turbidity
(NTU)
MW-503s 5/30/2023 20.39 2.54 0.05 7.12 -78 34.9
MW-503i 5/30/2023 20.59 1.22 0.03 7.03 -112 2.5
MW-504s 6/2/2023 20.48 1.72 0.14 6.98 157 0
MW-504i 6/2/2023 20.74 1.65 12.24 7.07 -172 0
MW-505s 5/25/2023 20.46 3.04 0.04 7.73 -102 0.7
MW-505i¹ NR NR NR NR NR NR NR
MW-506s 6/1/2023 18.79 1.76 0.09 7.28 188 0
MW-506i 6/1/2023 17.60 1.80 0.06 7.06 20 0
MW-507s 6/1/2023 17.64 2.67 0.12 6.71 -96 41.7
MW-507i 6/1/2023 17.58 1.68 0.14 6.90 29 0
MW-601s 6/1/2023 18.21 2.46 0.05 6.94 181 0
MW-601i 6/1/2023 18.78 1.95 0.11 7.17 -184 0
MW-602s 5/30/2023 21.00 2.21 0.04 7.03 278 34.4
MW-602i 5/30/2023 19.48 1.85 0.04 6.83 305 2.2
MW-701s 6/1/2023 19.36 1.96 0.05 7.04 105 0
MW-701i 6/1/2023 18.35 1.44 0.06 6.88 -142 18.7
MW-702s 5/31/2023 21.30 1.51 0.05 7.17 -23 6.3
MW-702i 5/31/2023 20.41 1.69 0.05 6.87 82 0.3
MW-703s 5/31/2023 21.54 1.77 0.05 6.92 190 3.5
MW-703i 5/31/2023 21.52 1.11 0.04 7.21 188 0
MW-704s 5/31/2023 22.72 2.10 0.05 6.91 212 12.2
MW-704i 5/31/2023 21.31 0.998 0.04 7.18 183 0
MW-705s 5/30/2023 18.94 1.67 0.07 7.56 75 0
MW-705i 5/30/2023 19.44 1.22 0.05 7.42 113 0
MW-706s 5/30/2023 18.93 1.48 0.05 7.69 276 0.1
MW-706i 5/30/2023 19.47 1.04 0.05 8.50 254 0.7
MW-707s 5/30/2023 17.07 2.20 0.05 6.76 247 0.8
MW-707i 5/30/2023 17.48 1.61 0.06 7.27 248 5.7
SW-201² 6/2/2023 16.62 0.743 0.10 7.66 127 27.2
SW-202² 6/2/2023 16.51 0.895 0.23 7.78 74 28.1
ºC - Degrees Celsius
µS/cm - Microsiemens per centimeter
mg/L - Milligrams per liter
mV - Millivolts
NTU - Nephelometric turbidity unit
NR - Not Recorded
¹Parameters were not recorded due to an insufficient amount of water
²Surface water samples collected from the Jordan River
Table 4: Dissolved Metal Concentrations in Groundwater and Surface Water
Page 1 of 2
Monitoring Group
Well ID MW-503s MW-503i MW-504s MW-504i MW-505s MW-505i MW-506s MW-506i MW-507s MW-507i MW-601s MW-601i MW-602s MW-602s FD MW-602i
Sample Date 05/30/23 05/30/23 06/02/23 06/02/23 05/25/23 05/25/23 06/01/23 06/01/23 06/01/23 06/01/23 06/01/23 06/01/23 05/30/23 05/30/23 05/30/23
Antimony (µg/L) 2 UJ 2 UJ 2 UJ 2 UJ 4.5 J+ 2 UJ 2 UJ 2 UJ 2 UJ 2 UJ 7.8 J+ 2 UJ 16 J+ 15 J+ 2 UJ
Arsenic (µg/L) 3.6 J+ 1 U 1 U 1 U 28 J+ 1 U 14 J+ 1 U 14 J+ 1 U 4000 2100 430 J+ 430 48 J+
Cadmium (µg/L) 1 U 1 U 1 U 1 U 8 1 U 1 U 1 U 1 U 0.33 J 460 1 U 1 U 1 U 1 U
Selenium (µg/L) 5 U 4.1 J 6 6.2 5 U 3.6 J 5 U 4 J 5 U 3.7 J 22 18 34 34 8.1
µg/L Micro grams per Liter
FD Field Duplicate
U The analyte was analyzed for, but was not detected above the level of the reported sample quantitatiion limit.
J The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample.
J+ The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample. The associated value has a high bias.
UJ The reported quantitation limit is estimated because quality control criteria were not met. Element may or may not be present.
Plume Core Monitoring WellsUpgradient Monitoring Wells Downgradient Monitoring Wells
Table 4: Dissolved Metal Concentrations in Groundwater and Surface Water
Page 2 of 2
Monitoring Group
Well ID MW-701s MW-701i MW-702s MW-702i MW-703s MW-703i MW-704s MW-704i MW-705s MW-705i MW-706s MW-706i MW-707s MW-707i SW-201 SW-202
Sample Date 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/31/23 05/30/23 05/30/23 05/30/23 05/30/23 06/02/23 06/02/23
Antimony (µg/L)380 0.72 J 2 UJ 2 UJ 2 UJ 2.2 J+ 2 UJ 2 U 2 U 2 J+ 2 U 53 J+ 2 U 2 U 2 U 2 U 2 U
Arsenic (µg/L)7000 9.4 1 U 12 J+ 1 U 2800 1.1 J+ 590 0.62 J 390 74 230 5 110 1.3 5.1 6.4
Cadmium (µg/L)1560 0.37 J 1 U 1 U 1 U 1 U 1 U 0.36 J 1 U 1 U 0.11 J 0.99 J 1 U 0.15 J 0.18 J 0.2 U 0.2 U
Selenium (µg/L)900 4.4 J 5.1 5 U 11 25 6.7 8.3 3.3 J 5 U 5 U 49 3.8 J 2.1 J 2.4 J 1.9 J 2.1 J
NS Not Sampled
µg/L Micro grams per Liter
U The analyte was analyzed for, but was not detected above the level of the reported sample quantitatiion limit.
J The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample.
J+ The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample. The associated value has a high bias.
UJ The reported quantitation limit is estimated because quality control criteria were not met. Element may or may not be present.
ACL Monitoring Wells Surface Water
ACL Value
(µg/L)
Table 5: Comparison of Surface Water Results to Surface Water Quality Criteria
Analyte & Units
Human
Health (µg/L)
Aquatic Wildlife
1 hr (µg/L)
Aquatic Wildlife
4 Day (µg/L)
Agriculture
(µg/L)
SW-201
6/2/23 (µg/L)
SW-202
6/2/23 (µg/L)
Antimony 4,300 NS NS NS 2 U 2 U
Arsenic NS 340 150 100 5.1 6.4
Cadmium NS 2 0.25 10 0.2 U 0.2 U
Selenium NS 18.4 4.6 50 1.9 J 2.1 J
Metal results are for the dissolved fraction
NS No Standard
µg/L micro grams per liter
J The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample.
U The analyte was analyzed for, but was not detected above the level of the reported sample quantitatiion limit.
Surface Water Quality Criteria Sample Location Results
Table 6: Summary of Antimony Trends in Groundwater and Surface Water
Well ID Coefficient of
Variation
Mann-Kendall
Statistic (S)Confidence Factor Trend
MW-503s 0.13 -3 56.9% Stable
MW-503i 0.40 -7 70.0% Stable
MW-504s 0.28 -3 56.9% Stable
MW-504i 0.25 -3 56.9% Stable
MW-505s 0.79 17 92.2%Prob. Increasing
MW-505i 0.33 -9 75.8% Stable
MW-506s 0.60 -3 56.9% Stable
MW-506i 0.39 -9 75.8% Stable
MW-507s 0.49 -9 75.8% Stable
MW-507i 0.53 -9 75.8% Stable
MW-601s 0.13 11 81.0% No Trend
MW-601i 0.73 -7 70.0% Stable
MW-602s 0.09 -20 95.5%Decreasing
MW-602i 0.63 -15 89.2% Stable
MW-701s 0.61 -7 70.0% Stable
MW-701i 0.28 -3 56.9% Stable
MW-702s 0.81 3 56.9% No Trend
MW-702i 0.60 -3 56.9% Stable
MW-703s 0.60 -2 53.5% Stable
MW-703i 0.60 -7 70.0% Stable
MW-704s 0.71 -2 53.5% Stable
MW-704i 0.09 -3 56.9% Stable
MW-705s 0.3 -11 81.0% Stable
MW-705i 0.38 -10 78.4% Stable
MW-706s 0.10 -17 92.2%Prob. Decreasing
MW-706i 0.21 -3 56.9% Stable
MW-707s 0.39 -9 75.8% Stable
MW-707i 0.39 -7 70.0% Stable
SW-201* 0.85 -15 89.2% Stable
SW-202* 0.82 -15 89.2% Stable
* Surface Water Locations
Table 7: Summary of Arsenic Trends in Groundwater and Surface Water
Well ID Coefficient of
Variation
Mann-Kendall
Statistic (S)Confidence Factor Trend
MW-503s 1.00 13 85.4% No Trend
MW-503i 2.12 -6 66.8% No Trend
MW-504s 0.26 -23 97.7%Decreasing
MW-504i 0.18 -15 89.2% Stable
MW-505s 0.64 24 98.2%Increasing
MW-505i 0.25 -4 60.3% Stable
MW-506s 0.85 11 81.0% No Trend
MW-506i 0.23 -11 81.0% Stable
MW-507s 0.60 -27 99.2%Decreasing
MW-507i 0.62 -18 93.4%Prob. Decreasing
MW-601s 0.39 24 98.2%Increasing
MW-601i 0.67 31 99.8%Increasing
MW-602s 0.14 -31 99.8%Decreasing
MW-602i 0.80 20 95.5%Increasing
MW-701s 0.16 -32 99.9%Decreasing
MW-701i 0.20 -22 97.1%Decreasing
MW-702s 2.56 -3 56.9% No Trend
MW-702i 0.23 -22 97.1%Decreasing
MW-703s 0.74 19 94.6%Prob. Increasing
MW-703i 0.80 -6 66.8% Stable
MW-704s 0.11 -26 98.9%Decreasing
MW-704i 2.74 -9 75.8% No Trend
MW-705s 0.07 6 66.8% No Trend
MW-705i 0.34 -13 85.4% Stable
MW-706s 0.13 20 95.5%Increasing
MW-706i 0.10 14 87.3% No Trend
MW-707s 0.63 1 50.0% No Trend
MW-707i 0.13 -18 93.4%Prob. Decreasing
SW-201* 0.23 -3 56.9% Stable
SW-202* 1.57 -11 81.0% No Trend
* Surface Water Locations
Table 8: Summary of Cadmium Trends in Groundwater and Surface Water
Well ID Coefficient of
Variation
Mann-Kendall
Statistic (S)Confidence Factor Trend
MW-503s 0.99 -13 85.4% Stable
MW-503i 0.37 -9 75.8% Stable
MW-504s 0.48 -18 93.4%Prob. Decreasing
MW-504i 0.16 16 90.7%Prob. Increasing
MW-505s 1.01 36 >99.9 Increasing
MW-505i 0.07 -9 75.8% Stable
MW-506s 0.77 -3 56.9% Stable
MW-506i 0.89 18 93.4%Prob. Increasing
MW-507s 0.34 -19 94.6%Prob. Decreasing
MW-507i 0.39 -3 56.9% Stable
MW-601s 0.09 -10 78.4% Stable
MW-601i 0.87 -5 63.6% Stable
MW-602s 0.44 -5 63.6% Stable
MW-602i 0.62 -2 53.5% Stable
MW-701s 0.14 -3 56.9% Stable
MW-701i 0.00 0 45.6% Stable
MW-702s 0.18 3 56.9% No Trend
MW-702i 0.00 0 45.6% Stable
MW-703s 0.69 10 78.4% No Trend
MW-703i 0.89 -8 72.9% Stable
MW-704s 0.47 5 63.6% No Trend
MW-704i 0.00 0 45.6% Stable
MW-705s 0.21 9 75.8% No Trend
MW-705i 0.07 9 75.8% No Trend
MW-706s 0.46 -6 66.8% Stable
MW-706i 0.47 -1 50.0% Stable
MW-707s 0.73 -9 75.8% Stable
MW-707i 0.83 1 50.0% No Trend
SW-201* 0.49 -11 81.0% Stable
SW-202* 0.88 -9 75.8% Stable
* Surface Water Locations
Table 9: Summary of Selenium Trends in Groundwater and Surface Water
Well ID Coefficient of
Variation
Mann-Kendall
Statistic (S)Confidence Factor Trend
MW-503s 0.77 -5 63.6% Stable
MW-503i 0.35 -10 78.4% Stable
MW-504s 0.12 7 70.0% No Trend
MW-504i 0.14 2 53.5% No Trend
MW-505s 0.83 -17 92.2%Prob. Decreasing
MW-505i 0.43 20 95.5%Increasing
MW-506s 0.69 -5 63.6% Stable
MW-506i 0.2 -1 50.0% Stable
MW-507s 0 0 45.6% Stable
MW-507i 0.70 8 72.9% No Trend
MW-601s 0.26 17 92.2%Prob. Increasing
MW-601i 0.27 23 97.7%Increasing
MW-602s 0.42 9 75.8% No Trend
MW-602i 0.21 5 63.6% No Trend
MW-701s 0.81 -25 98.6%Decreasing
MW-701i 0.16 -15 89.2% Stable
MW-702s 1.09 -8 72.9% No Trend
MW-702i 0.13 -6 66.8% Stable
MW-703s 0.25 1 50.0% No Trend
MW-703i 0.52 8 72.9% No Trend
MW-704s 0.41 0 45.6% Stable
MW-704i 0.62 -5 63.6% Stable
MW-705s 0.10 -5 63.6% Stable
MW-705i 0.65 -17 92.2%Prob. Decreasing
MW-706s 0.32 -3 56.9% Stable
MW-706i 0.20 16 90.7%Prob. Increasing
MW-707s 1.42 -11 81.0% No Trend
MW-707i 0.76 6 66.8% No Trend
SW-201* 0.39 -2 53.5% Stable
SW-202* 0.50 6 66.8% No Trend
* Surface Water Locations

Appendix A:
Water Level Measurements

Appendix B:
Water Quality Field Parameters

Appendix C:
Laboratory Analytical Data Reports
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 1 Wed, 28 Jun 2023 08:35:44
Sample Number: LCS01 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Spike 46 ug/L 46 1 YES S3VE
Antimony Spike 4.2 J+ug/L 4.2 1 YES S3VE
Arsenic Spike 2.0 J+ug/L 2.0 1 YES S3VE
Barium Spike 19 ug/L 19 1 YES S3VE
Beryllium Spike 2.0 ug/L 2.0 1 YES S3VE
Cadmium Spike 1.9 ug/L 1.9 1 YES S3VE
Calcium Spike 1000 ug/L 1000 1 YES S3VE
Chromium Spike 4.1 ug/L 4.1 1 YES S3VE
Cobalt Spike 2.1 ug/L 2.1 1 YES S3VE
Copper Spike 4.0 ug/L 4.0 1 YES S3VE
Iron Spike 410 ug/L 410 1 YES S3VE
Lead Spike 1.8 J+ug/L 1.8 1 YES S3VE
Magnesium Spike 1000 J+ug/L 1000 1 YES S3VE
Manganese Spike 2.3 ug/L 2.3 1 YES S3VE
Nickel Spike 2.2 ug/L 2.2 1 YES S3VE
Potassium Spike 1000 ug/L 1000 1 YES S3VE
Selenium Spike 9.6 ug/L 9.6 1 YES S3VE
Silver Spike 2.0 ug/L 2.0 1 YES S3VE
Sodium Spike 1100 J+ug/L 1100 1 YES S3VE
Thallium Spike 1.9 ug/L 1.9 1 YES S3VE
Vanadium Spike 9.9 ug/L 9.9 1 YES S3VE
Zinc Spike 10 ug/L 10 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 2 Wed, 28 Jun 2023 08:35:44
Sample Number: LCS02 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Spike 45 ug/L 45 1 YES S3VE
Antimony Spike 4.1 ug/L 4.1 1 YES S3VE
Arsenic Spike 2.0 ug/L 2.0 1 YES S3VE
Barium Spike 20 ug/L 20 1 YES S3VE
Beryllium Spike 2.1 J+ug/L 2.1 1 YES S3VE
Cadmium Spike 1.9 ug/L 1.9 1 YES S3VE
Calcium Spike 1000 ug/L 1000 1 YES S3VE
Chromium Spike 4.0 ug/L 4.0 1 YES S3VE
Cobalt Spike 2.1 J+ug/L 2.1 1 YES S3VE
Copper Spike 4.0 ug/L 4.0 1 YES S3VE
Iron Spike 410 ug/L 410 1 YES S3VE
Lead Spike 2.0 J+ug/L 2.0 1 YES S3VE
Magnesium Spike 1000 J+ug/L 1000 1 YES S3VE
Manganese Spike 2.3 ug/L 2.3 1 YES S3VE
Nickel Spike 2.3 ug/L 2.3 1 YES S3VE
Potassium Spike 1000 J+ug/L 1000 1 YES S3VE
Selenium Spike 11 ug/L 11 1 YES S3VE
Silver Spike 1.9 ug/L 1.9 1 YES S3VE
Sodium Spike 1000 J+ug/L 1000 1 YES S3VE
Thallium Spike 1.9 ug/L 1.9 1 YES S3VE
Vanadium Spike 10 ug/L 10 1 YES S3VE
Zinc Spike 10 ug/L 10 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 3 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA4 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW503i pH: 1.Sample Date: 05/30/2023 Sample Time: 14:25:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 150 ug/L 150 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.50 J 1 YES S3VE
Barium Target 21 ug/L 21 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 210000 ug/L 210000 D 3 YES S3VE
Chromium Target 2.3 ug/L 2.3 1 YES S3VE
Cobalt Target 0.10 J ug/L 0.10 J 1 YES S3VE
Copper Target 1.1 J ug/L 1.1 J 1 YES S3VE
Iron Target 160 J ug/L 160 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 82000 J+ug/L 82000 1 YES S3VE
Manganese Target 6.4 ug/L 6.4 1 YES S3VE
Nickel Target 1.1 ug/L 1.1 1 YES S3VE
Potassium Target 7600 ug/L 7600 1 YES S3VE
Selenium Target 4.1 J ug/L 4.1 J 1 YES S3VE
Silver Target 0.20 J ug/L 0.20 J 1 YES S3VE
Sodium Target 210000 J+ug/L 210000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.94 J ug/L 0.94 J 1 YES S3VE
Zinc Target 2.6 J ug/L 2.6 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 4 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA5 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW503s pH: 1.Sample Date: 05/30/2023 Sample Time: 14:09:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 21 ug/L 21 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 3.6 J+ug/L 3.6 1 YES S3VE
Barium Target 57 ug/L 57 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 260000 ug/L 260000 D 6 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.16 J ug/L 0.16 J 1 YES S3VE
Copper Target 0.42 J ug/L 0.42 J 1 YES S3VE
Iron Target 7800 ug/L 7800 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 230000 J+ug/L 230000 D 3 YES S3VE
Manganese Target 610 ug/L 610 1 YES S3VE
Nickel Target 1.0 ug/L 1.0 1 YES S3VE
Potassium Target 35000 ug/L 35000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 290000 J+ug/L 290000 D 6 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.46 J ug/L 0.46 J 1 YES S3VE
Zinc Target 2.1 J ug/L 2.1 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 5 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA6 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW504i pH: 1.Sample Date: 06/02/2023 Sample Time: 13:42:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.49 J 1 YES S3VE
Barium Target 19 ug/L 19 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 270000 ug/L 270000 D 3 YES S3VE
Chromium Target 1.3 J ug/L 1.3 J 1 YES S3VE
Cobalt Target 0.17 J ug/L 0.17 J 1 YES S3VE
Copper Target 0.68 J ug/L 0.68 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 96000 J+ug/L 96000 1 YES S3VE
Manganese Target 15 ug/L 15 1 YES S3VE
Nickel Target 0.68 J ug/L 0.68 J 1 YES S3VE
Potassium Target 8600 ug/L 8600 1 YES S3VE
Selenium Target 6.2 ug/L 6.2 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 220000 J+ug/L 220000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.67 J ug/L 0.67 J 1 YES S3VE
Zinc Target 28 ug/L 28 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 6 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA7 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW504s pH: 1.Sample Date: 06/02/2023 Sample Time: 13:25:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.69 J 1 YES S3VE
Barium Target 24 ug/L 24 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 320000 ug/L 320000 D 3 YES S3VE
Chromium Target 1.2 J ug/L 1.2 J 1 YES S3VE
Cobalt Target 0.047 J ug/L 0.047 J 1 YES S3VE
Copper Target 1.0 J ug/L 1.0 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 93000 J+ug/L 93000 1 YES S3VE
Manganese Target 0.41 J ug/L 0.41 J 1 YES S3VE
Nickel Target 0.43 J ug/L 0.43 J 1 YES S3VE
Potassium Target 10000 ug/L 10000 1 YES S3VE
Selenium Target 6.0 ug/L 6.0 1 YES S3VE
Silver Target 0.14 J ug/L 0.14 J 1 YES S3VE
Sodium Target 250000 J+ug/L 250000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.90 J ug/L 0.90 J 1 YES S3VE
Zinc Target 4.2 J ug/L 4.2 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 7 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA8 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW505i pH: 1.Sample Date: 05/25/2023 Sample Time: 14:23:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.55 J 1 YES S3VE
Barium Target 45 ug/L 45 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 120000 ug/L 120000 1 YES S3VE
Chromium Target 1.2 J ug/L 1.2 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 0.43 J ug/L 0.43 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 38000 J+ug/L 38000 1 YES S3VE
Manganese Target 0.84 J ug/L 0.84 J 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 6000 ug/L 6000 1 YES S3VE
Selenium Target 3.6 J ug/L 3.6 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 250000 J+ug/L 250000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.77 J ug/L 0.77 J 1 YES S3VE
Zinc Target 2.2 J ug/L 2.2 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 8 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BA9 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW505s pH: 1.Sample Date: 05/25/2023 Sample Time: 14:13:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 18 J ug/L 18 J 1 YES S3VE
Antimony Target 4.5 J+ug/L 4.5 *1 YES S3VE
Arsenic Target 28 J+ug/L 28 1 YES S3VE
Barium Target 45 ug/L 45 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 8.0 ug/L 8.0 1 YES S3VE
Calcium Target 320000 ug/L 320000 D 5 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.66 J ug/L 0.66 J 1 YES S3VE
Copper Target 1.6 J ug/L 1.6 J 1 YES S3VE
Iron Target 100 J ug/L 100 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.36 J 1 YES S3VE
Magnesium Target 110000 J+ug/L 110000 1 YES S3VE
Manganese Target 900 ug/L 900 1 YES S3VE
Nickel Target 4.7 ug/L 4.7 1 YES S3VE
Potassium Target 18000 ug/L 18000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 260000 J+ug/L 260000 D 5 YES S3VE
Thallium Target 0.62 J ug/L 0.62 J 1 YES S3VE
Vanadium Target 2.3 J ug/L 2.3 J 1 YES S3VE
Zinc Target 770 ug/L 770 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 9 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB0 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW506i pH: 1.Sample Date: 06/01/2023 Sample Time: 14:26:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 130 ug/L 130 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.66 J 1 YES S3VE
Barium Target 23 ug/L 23 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 290000 ug/L 290000 D 3 YES S3VE
Chromium Target 0.91 J ug/L 0.91 J 1 YES S3VE
Cobalt Target 0.16 J ug/L 0.16 J 1 YES S3VE
Copper Target 1.3 J ug/L 1.3 J 1 YES S3VE
Iron Target 140 J ug/L 140 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.27 J 1 YES S3VE
Magnesium Target 96000 J+ug/L 96000 1 YES S3VE
Manganese Target 5.8 ug/L 5.8 1 YES S3VE
Nickel Target 0.46 J ug/L 0.46 J 1 YES S3VE
Potassium Target 10000 ug/L 10000 1 YES S3VE
Selenium Target 4.0 J ug/L 4.0 J 1 YES S3VE
Silver Target 0.20 J ug/L 0.20 J 1 YES S3VE
Sodium Target 250000 J+ug/L 250000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.1 J ug/L 1.1 J 1 YES S3VE
Zinc Target 1.8 J ug/L 1.8 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 10 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB1 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW506s pH: 1.Sample Date: 06/01/2023 Sample Time: 14:06:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 14 J+ug/L 14 1 YES S3VE
Barium Target 150 ug/L 150 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 100000 ug/L 100000 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.056 J ug/L 0.056 J 1 YES S3VE
Copper Target 0.32 J ug/L 0.32 J 1 YES S3VE
Iron Target 180 J ug/L 180 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 49000 J+ug/L 49000 1 YES S3VE
Manganese Target 51 ug/L 51 1 YES S3VE
Nickel Target 0.61 J ug/L 0.61 J 1 YES S3VE
Potassium Target 9900 ug/L 9900 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 400000 J+ug/L 400000 D 5 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.21 J ug/L 0.21 J 1 YES S3VE
Zinc Target 6.4 ug/L 6.4 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 11 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB2 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW507i pH: 1.Sample Date: 06/01/2023 Sample Time: 15:03:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 21 ug/L 21 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.90 J 1 YES S3VE
Barium Target 31 ug/L 31 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.33 J ug/L 0.33 J 1 YES S3VE
Calcium Target 280000 ug/L 280000 D 3 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.94 J ug/L 0.94 J 1 YES S3VE
Copper Target 1.4 J ug/L 1.4 J 1 YES S3VE
Iron Target 25 J ug/L 25 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 85000 J+ug/L 85000 1 YES S3VE
Manganese Target 1200 ug/L 1200 1 YES S3VE
Nickel Target 1.6 ug/L 1.6 1 YES S3VE
Potassium Target 12000 ug/L 12000 1 YES S3VE
Selenium Target 3.7 J ug/L 3.7 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 320000 J+ug/L 320000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.86 J ug/L 0.86 J 1 YES S3VE
Zinc Target 2.7 J ug/L 2.7 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 12 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB3 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW507s pH: 1.Sample Date: 06/01/2023 Sample Time: 14:55:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 14 J+ug/L 14 1 YES S3VE
Barium Target 150 ug/L 150 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 100000 ug/L 100000 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.061 J ug/L 0.061 J 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 180 J ug/L 180 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 50000 J+ug/L 50000 1 YES S3VE
Manganese Target 51 ug/L 51 1 YES S3VE
Nickel Target 0.62 J ug/L 0.62 J 1 YES S3VE
Potassium Target 10000 ug/L 10000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 420000 J+ug/L 420000 D 5 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.20 J ug/L 0.20 J 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 13 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB4 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW601i pH: 1.Sample Date: 06/01/2023 Sample Time: 12:13:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 1.6 J*1 YES S3VE
Arsenic Target 2100 ug/L 2100 D 3 YES S3VE
Barium Target 18 ug/L 18 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 300000 ug/L 300000 D 3 YES S3VE
Chromium Target 0.53 J ug/L 0.53 J 1 YES S3VE
Cobalt Target 0.054 J ug/L 0.054 J 1 YES S3VE
Copper Target 0.36 J ug/L 0.36 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 120000 J+ug/L 120000 1 YES S3VE
Manganese Target 6.8 ug/L 6.8 1 YES S3VE
Nickel Target 0.49 J ug/L 0.49 J 1 YES S3VE
Potassium Target 19000 ug/L 19000 1 YES S3VE
Selenium Target 18 ug/L 18 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 240000 J+ug/L 240000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 3.6 J ug/L 3.6 J 1 YES S3VE
Zinc Target 7.4 ug/L 7.4 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 14 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB5 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW601s pH: 1.Sample Date: 06/01/2023 Sample Time: 12:00:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 7.8 J+ug/L 7.8 *1 YES S3VE
Arsenic Target 4000 ug/L 4000 D 10 YES S3VE
Barium Target 28 ug/L 28 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 460 ug/L 460 1 YES S3VE
Calcium Target 330000 ug/L 330000 D 5 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.2 ug/L 1.2 1 YES S3VE
Copper Target 1.4 J ug/L 1.4 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 150000 J+ug/L 150000 D 5 YES S3VE
Manganese Target 160 ug/L 160 1 YES S3VE
Nickel Target 3.1 ug/L 3.1 1 YES S3VE
Potassium Target 32000 ug/L 32000 1 YES S3VE
Selenium Target 22 ug/L 22 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 240000 J+ug/L 240000 D 5 YES S3VE
Thallium Target 11 ug/L 11 1 YES S3VE
Vanadium Target 8.2 ug/L 8.2 1 YES S3VE
Zinc Target 310 ug/L 310 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 15 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB6 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW602i pH: 1.Sample Date: 05/30/2023 Sample Time: 13:34:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 18 J ug/L 18 J 1 YES S3VE
Antimony Target 2.0 UJ ug/L 0.86 J*1 YES S3VE
Arsenic Target 48 J+ug/L 48 1 YES S3VE
Barium Target 18 ug/L 18 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 330000 ug/L 330000 D 3 YES S3VE
Chromium Target 0.67 J ug/L 0.67 J 1 YES S3VE
Cobalt Target 0.067 J ug/L 0.067 J 1 YES S3VE
Copper Target 1.3 J ug/L 1.3 J 1 YES S3VE
Iron Target 29 J ug/L 29 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 100000 J+ug/L 100000 1 YES S3VE
Manganese Target 3.7 ug/L 3.7 1 YES S3VE
Nickel Target 0.60 J ug/L 0.60 J 1 YES S3VE
Potassium Target 18000 ug/L 18000 1 YES S3VE
Selenium Target 8.1 ug/L 8.1 1 YES S3VE
Silver Target 0.079 J ug/L 0.079 J 1 YES S3VE
Sodium Target 300000 J+ug/L 300000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.3 J ug/L 1.3 J 1 YES S3VE
Zinc Target 4.0 J ug/L 4.0 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 16 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB7 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW602s pH: 1.Sample Date: 05/30/2023 Sample Time: 13:17:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 49 ug/L 49 1 YES S3VE
Antimony Target 16 J+ug/L 16 *1 YES S3VE
Arsenic Target 430 J+ug/L 430 1 YES S3VE
Barium Target 20 ug/L 20 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 370000 ug/L 370000 D 3 YES S3VE
Chromium Target 0.69 J ug/L 0.69 J 1 YES S3VE
Cobalt Target 0.15 J ug/L 0.15 J 1 YES S3VE
Copper Target 1.5 J ug/L 1.5 J 1 YES S3VE
Iron Target 110 J ug/L 110 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.25 J 1 YES S3VE
Magnesium Target 170000 J+ug/L 170000 D 3 YES S3VE
Manganese Target 14 ug/L 14 1 YES S3VE
Nickel Target 1.1 ug/L 1.1 1 YES S3VE
Potassium Target 28000 ug/L 28000 1 YES S3VE
Selenium Target 34 ug/L 34 1 YES S3VE
Silver Target 0.047 J ug/L 0.047 J 1 YES S3VE
Sodium Target 290000 J+ug/L 290000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.3 J ug/L 2.3 J 1 YES S3VE
Zinc Target 4.5 J ug/L 4.5 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 17 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB8 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW701i pH: 1.Sample Date: 06/01/2023 Sample Time: 13:10:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 ug/L 20 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.71 J 1 YES S3VE
Barium Target 21 ug/L 21 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 190000 ug/L 190000 D 2 YES S3VE
Chromium Target 1.0 J ug/L 1.0 J 1 YES S3VE
Cobalt Target 0.052 J ug/L 0.052 J 1 YES S3VE
Copper Target 2.4 ug/L 2.4 1 YES S3VE
Iron Target 24 J ug/L 24 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.42 J 1 YES S3VE
Magnesium Target 83000 J+ug/L 83000 1 YES S3VE
Manganese Target 4.8 ug/L 4.8 1 YES S3VE
Nickel Target 0.99 J ug/L 0.99 J 1 YES S3VE
Potassium Target 7600 ug/L 7600 1 YES S3VE
Selenium Target 5.1 ug/L 5.1 1 YES S3VE
Silver Target 0.13 J ug/L 0.13 J 1 YES S3VE
Sodium Target 180000 J+ug/L 180000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.91 J ug/L 0.91 J 1 YES S3VE
Zinc Target 14 ug/L 14 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 18 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB9 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW701s pH: 1.Sample Date: 06/01/2023 Sample Time: 12:58:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 0.66 J ug/L 0.66 J*1 YES S3VE
Arsenic Target 9.4 ug/L 9.4 1 YES S3VE
Barium Target 46 ug/L 46 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.37 J ug/L 0.37 J 1 YES S3VE
Calcium Target 270000 ug/L 270000 D 3 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 0.30 J 1 YES S3VE
Copper Target 1.4 J ug/L 1.4 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 97000 J+ug/L 97000 1 YES S3VE
Manganese Target 650 ug/L 650 1 YES S3VE
Nickel Target 2.9 ug/L 2.9 1 YES S3VE
Potassium Target 15000 J+ug/L 15000 1 YES S3VE
Selenium Target 4.4 J ug/L 4.4 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 270000 J+ug/L 270000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.8 J ug/L 1.8 J 1 YES S3VE
Zinc Target 2.9 J ug/L 2.9 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 19 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB9A Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: 06/01/2023 Sample Time: 12:58:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Antimony Spike 7.4 ug/L 7.4 *1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 20 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB9D Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: 06/01/2023 Sample Time: 12:58:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 0.64 J ug/L 0.64 J 1 YES S3VE
Arsenic Target 9.3 ug/L 9.3 1 YES S3VE
Barium Target 46 ug/L 46 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.37 J ug/L 0.37 J 1 YES S3VE
Calcium Target 260000 ug/L 260000 D 3 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 0.32 J 1 YES S3VE
Copper Target 1.3 J ug/L 1.3 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 97000 J+ug/L 97000 1 YES S3VE
Manganese Target 640 ug/L 640 1 YES S3VE
Nickel Target 3.0 ug/L 3.0 1 YES S3VE
Potassium Target 15000 J+ug/L 15000 1 YES S3VE
Selenium Target 3.8 J ug/L 3.8 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 260000 J+ug/L 260000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.9 J ug/L 1.9 J 1 YES S3VE
Zinc Target 2.4 J ug/L 2.4 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 21 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB9L Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 100 U ug/L 100 U 5 YES S3VE
Antimony Target 10 U ug/L 10 U 5 YES S3VE
Arsenic Target 8.4 ug/L 8.4 5 YES S3VE
Barium Target 46 J ug/L 46 J 5 YES S3VE
Beryllium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Cadmium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Calcium Target 250000 ug/L 250000 D 15 YES S3VE
Chromium Target 10 U ug/L 10 U 5 YES S3VE
Cobalt Target 5.0 U ug/L 0.35 J 5 YES S3VE
Copper Target 1.4 J ug/L 1.4 J 5 YES S3VE
Iron Target 1000 U ug/L 1000 U 5 YES S3VE
Lead Target 5.0 U ug/L 5.0 U 5 YES S3VE
Magnesium Target 100000 J+ug/L 100000 5 YES S3VE
Manganese Target 630 ug/L 630 5 YES S3VE
Nickel Target 2.6 J ug/L 2.6 J 5 YES S3VE
Potassium Target 14000 J+ug/L 14000 5 YES S3VE
Selenium Target 25 U ug/L 25 U 5 YES S3VE
Silver Target 5.0 U ug/L 5.0 U 5 YES S3VE
Sodium Target 260000 J+ug/L 260000 D 15 YES S3VE
Thallium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Vanadium Target 1.6 J ug/L 1.6 J 5 YES S3VE
Zinc Target 25 U ug/L 25 U 5 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 22 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BB9S Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: 06/01/2023 Sample Time: 12:58:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Antimony Spike 0.72 J ug/L 0.72 J*1 YES S3VE
Arsenic Spike 53 ug/L 53 1 YES S3VE
Barium Spike 2100 ug/L 2100 1 YES S3VE
Beryllium Spike 57 J+ug/L 57 1 YES S3VE
Cadmium Spike 52 ug/L 52 1 YES S3VE
Chromium Spike 200 ug/L 200 1 YES S3VE
Cobalt Spike 510 J+ug/L 510 1 YES S3VE
Copper Spike 250 ug/L 250 1 YES S3VE
Lead Spike 20 J+ug/L 20 1 YES S3VE
Manganese Spike 1200 ug/L 1200 1 YES S3VE
Nickel Spike 500 ug/L 500 1 YES S3VE
Selenium Spike 110 ug/L 110 1 YES S3VE
Silver Spike 41 ug/L 41 1 YES S3VE
Thallium Spike 50 ug/L 50 1 YES S3VE
Vanadium Spike 530 ug/L 530 1 YES S3VE
Zinc Spike 510 ug/L 510 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 23 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BC0 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW702i pH: 1.Sample Date: 05/31/2023 Sample Time: 14:33:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 1.0 U ug/L 0.56 J 1 YES S3VE
Barium Target 19 ug/L 19 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 260000 ug/L 260000 D 3 YES S3VE
Chromium Target 1.0 J ug/L 1.0 J 1 YES S3VE
Cobalt Target 0.061 J ug/L 0.061 J 1 YES S3VE
Copper Target 0.67 J ug/L 0.67 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 99000 J+ug/L 99000 1 YES S3VE
Manganese Target 1.2 ug/L 1.2 1 YES S3VE
Nickel Target 0.48 J ug/L 0.48 J 1 YES S3VE
Potassium Target 9300 ug/L 9300 1 YES S3VE
Selenium Target 11 ug/L 11 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 210000 J+ug/L 210000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.87 J ug/L 0.87 J 1 YES S3VE
Zinc Target 1.2 J ug/L 1.2 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 24 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BC1 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW702s pH: 1.Sample Date: 05/31/2023 Sample Time: 14:18:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 UJ ug/L 2.0 U*1 YES S3VE
Arsenic Target 12 J+ug/L 12 1 YES S3VE
Barium Target 160 ug/L 160 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 300000 ug/L 300000 D 3 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.42 J ug/L 0.42 J 1 YES S3VE
Copper Target 0.36 J ug/L 0.36 J 1 YES S3VE
Iron Target 1300 ug/L 1300 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 110000 J+ug/L 110000 1 YES S3VE
Manganese Target 160 ug/L 160 1 YES S3VE
Nickel Target 0.67 J ug/L 0.67 J 1 YES S3VE
Potassium Target 15000 ug/L 15000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 240000 J+ug/L 240000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.33 J ug/L 0.33 J 1 YES S3VE
Zinc Target 10 ug/L 10 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 25 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BC2 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW703i pH: 1.Sample Date: 05/31/2023 Sample Time: 13:44:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 75 ug/L 75 1 YES S3VE
Antimony Target 2.0 UJ ug/L 0.25 J*1 YES S3VE
Arsenic Target 1.1 J+ug/L 1.1 1 YES S3VE
Barium Target 22 ug/L 22 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 190000 ug/L 190000 D 2 YES S3VE
Chromium Target 0.91 J ug/L 0.91 J 1 YES S3VE
Cobalt Target 0.11 J ug/L 0.11 J 1 YES S3VE
Copper Target 1.1 J ug/L 1.1 J 1 YES S3VE
Iron Target 100 J ug/L 100 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.36 J 1 YES S3VE
Magnesium Target 72000 J+ug/L 72000 1 YES S3VE
Manganese Target 3.6 ug/L 3.6 1 YES S3VE
Nickel Target 0.34 J ug/L 0.34 J 1 YES S3VE
Potassium Target 6700 ug/L 6700 1 YES S3VE
Selenium Target 6.7 ug/L 6.7 1 YES S3VE
Silver Target 0.059 J ug/L 0.059 J 1 YES S3VE
Sodium Target 170000 J+ug/L 170000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.3 J ug/L 1.3 J 1 YES S3VE
Zinc Target 22 ug/L 22 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 26 Wed, 28 Jun 2023 08:35:44
Sample Number: MH0BC3 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW703s pH: 1.Sample Date: 05/31/2023 Sample Time: 13:32:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 76 ug/L 76 1 YES S3VE
Antimony Target 2.2 J+ug/L 2.2 *1 YES S3VE
Arsenic Target 2800 ug/L 2800 D 6 YES S3VE
Barium Target 34 ug/L 34 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 280000 ug/L 280000 D 6 YES S3VE
Chromium Target 0.56 J ug/L 0.56 J 1 YES S3VE
Cobalt Target 0.17 J ug/L 0.17 J 1 YES S3VE
Copper Target 2.1 ug/L 2.1 1 YES S3VE
Iron Target 160 J ug/L 160 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.35 J 1 YES S3VE
Magnesium Target 170000 J+ug/L 170000 D 3 YES S3VE
Manganese Target 12 ug/L 12 1 YES S3VE
Nickel Target 0.87 J ug/L 0.87 J 1 YES S3VE
Potassium Target 23000 ug/L 23000 1 YES S3VE
Selenium Target 25 ug/L 25 1 YES S3VE
Silver Target 0.19 J ug/L 0.19 J 1 YES S3VE
Sodium Target 300000 J+ug/L 300000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 6.0 ug/L 6.0 1 YES S3VE
Zinc Target 9.5 ug/L 9.5 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 27 Wed, 28 Jun 2023 08:35:44
Sample Number: PBS02 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 1.0 U ug/L 1.0 U 1 YES S3VE
Barium Target 10 U ug/L 10 U 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 500 U ug/L 500 U 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 500 U ug/L 500 U 1 YES S3VE
Manganese Target 1.0 U ug/L 1.0 U 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 500 U ug/L 500 U 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 500 U ug/L 500 U 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 28 Wed, 28 Jun 2023 08:35:44
Sample Number: PBW01 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 1.0 U ug/L 1.0 U 1 YES S3VE
Barium Target 10 U ug/L 10 U 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 500 U ug/L 500 U 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 500 U ug/L 500 U 1 YES S3VE
Manganese Target 1.0 U ug/L 1.0 U 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 500 U ug/L 500 U 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 42 J ug/L 42 J 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BA4 Lab Name: Bonner Analytical Testing Co.
Page 29 Wed, 28 Jun 2023 08:35:44
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 1 Wed, 28 Jun 2023 08:36:25
Sample Number: LCS01 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Spike 47 ug/L 47 1 YES S3VE
Antimony Spike 4.1 J+ug/L 4.1 1 YES S3VE
Arsenic Spike 1.9 ug/L 1.9 1 YES S3VE
Barium Spike 19 ug/L 19 1 YES S3VE
Beryllium Spike 1.9 J+ug/L 1.9 1 YES S3VE
Cadmium Spike 1.9 ug/L 1.9 1 YES S3VE
Calcium Spike 990 ug/L 990 1 YES S3VE
Chromium Spike 4.2 ug/L 4.2 1 YES S3VE
Cobalt Spike 2.2 ug/L 2.2 1 YES S3VE
Copper Spike 4.2 ug/L 4.2 1 YES S3VE
Iron Spike 410 ug/L 410 1 YES S3VE
Lead Spike 1.9 J+ug/L 1.9 1 YES S3VE
Magnesium Spike 1100 J+ug/L 1100 1 YES S3VE
Manganese Spike 2.4 ug/L 2.4 1 YES S3VE
Nickel Spike 2.3 ug/L 2.3 1 YES S3VE
Potassium Spike 1000 J+ug/L 1000 1 YES S3VE
Selenium Spike 11 ug/L 11 1 YES S3VE
Silver Spike 2.0 ug/L 2.0 1 YES S3VE
Sodium Spike 1100 J+ug/L 1100 1 YES S3VE
Thallium Spike 1.9 ug/L 1.9 1 YES S3VE
Vanadium Spike 10 ug/L 10 1 YES S3VE
Zinc Spike 9.8 ug/L 9.8 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 2 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC4 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW704i pH: 1.Sample Date: 05/31/2023 Sample Time: 13:08:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 0.62 J ug/L 0.62 J 1 YES S3VE
Barium Target 32 ug/L 32 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 170000 ug/L 170000 D 2 YES S3VE
Chromium Target 0.71 J ug/L 0.71 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 0.88 J ug/L 0.88 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 60000 J+ug/L 60000 1 YES S3VE
Manganese Target 1.7 ug/L 1.7 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 6400 J+ug/L 6400 1 YES S3VE
Selenium Target 2.9 J ug/L 2.9 J 1 YES S3VE
Silver Target 0.047 J ug/L 0.047 J 1 YES S3VE
Sodium Target 150000 J+ug/L 150000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.79 J ug/L 0.79 J 1 YES S3VE
Zinc Target 4.4 J ug/L 4.4 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 3 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC4D Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: 05/31/2023 Sample Time: 13:08:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 0.62 J ug/L 0.62 J 1 YES S3VE
Barium Target 32 ug/L 32 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 170000 ug/L 170000 D 2 YES S3VE
Chromium Target 0.73 J ug/L 0.73 J 1 YES S3VE
Cobalt Target 0.051 J ug/L 0.051 J 1 YES S3VE
Copper Target 0.97 J ug/L 0.97 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 60000 J+ug/L 60000 1 YES S3VE
Manganese Target 1.7 ug/L 1.7 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 6400 J+ug/L 6400 1 YES S3VE
Selenium Target 3.3 J ug/L 3.3 J 1 YES S3VE
Silver Target 0.044 J ug/L 0.044 J 1 YES S3VE
Sodium Target 150000 J+ug/L 150000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.88 J ug/L 0.88 J 1 YES S3VE
Zinc Target 4.7 J ug/L 4.7 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 4 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC4L Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 100 U ug/L 100 U 5 YES S3VE
Antimony Target 10 U ug/L 10 U 5 YES S3VE
Arsenic Target 5.0 U ug/L 5.0 U 5 YES S3VE
Barium Target 32 J ug/L 32 J 5 YES S3VE
Beryllium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Cadmium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Calcium Target 170000 ug/L 170000 D 10 YES S3VE
Chromium Target 10 U ug/L 10 U 5 YES S3VE
Cobalt Target 5.0 U ug/L 5.0 U 5 YES S3VE
Copper Target 1.0 J ug/L 1.0 J 5 YES S3VE
Iron Target 1000 U ug/L 1000 U 5 YES S3VE
Lead Target 5.0 U ug/L 5.0 U 5 YES S3VE
Magnesium Target 60000 J+ug/L 60000 5 YES S3VE
Manganese Target 5.0 U ug/L 5.0 U 5 YES S3VE
Nickel Target 5.0 U ug/L 5.0 U 5 YES S3VE
Potassium Target 6500 J+ug/L 6500 5 YES S3VE
Selenium Target 25 U ug/L 25 U 5 YES S3VE
Silver Target 5.0 U ug/L 5.0 U 5 YES S3VE
Sodium Target 150000 J+ug/L 150000 D 10 YES S3VE
Thallium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Vanadium Target 1.0 J ug/L 1.0 J 5 YES S3VE
Zinc Target 4.8 J ug/L 4.8 J 5 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 5 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC4S Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: 1.Sample Date: 05/31/2023 Sample Time: 13:08:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Antimony Spike 110 J+ug/L 110 1 YES S3VE
Arsenic Spike 40 ug/L 40 1 YES S3VE
Barium Spike 1900 ug/L 1900 1 YES S3VE
Beryllium Spike 50 J+ug/L 50 1 YES S3VE
Cadmium Spike 48 ug/L 48 1 YES S3VE
Chromium Spike 190 ug/L 190 1 YES S3VE
Cobalt Spike 460 ug/L 460 1 YES S3VE
Copper Spike 240 ug/L 240 1 YES S3VE
Lead Spike 18 J+ug/L 18 1 YES S3VE
Manganese Spike 470 ug/L 470 1 YES S3VE
Nickel Spike 470 ug/L 470 1 YES S3VE
Selenium Spike 100 ug/L 100 1 YES S3VE
Silver Spike 48 ug/L 48 1 YES S3VE
Thallium Spike 46 ug/L 46 1 YES S3VE
Vanadium Spike 490 ug/L 490 1 YES S3VE
Zinc Spike 480 ug/L 480 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 6 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC5 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW704s pH: 1.Sample Date: 05/31/2023 Sample Time: 12:56:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 1.5 J 1 YES S3VE
Arsenic Target 590 ug/L 590 1 YES S3VE
Barium Target 26 ug/L 26 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.36 J ug/L 0.36 J 1 YES S3VE
Calcium Target 310000 ug/L 310000 D 3 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.039 J ug/L 0.039 J 1 YES S3VE
Copper Target 1.2 J ug/L 1.2 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 120000 J+ug/L 120000 1 YES S3VE
Manganese Target 40 ug/L 40 1 YES S3VE
Nickel Target 2.0 ug/L 2.0 1 YES S3VE
Potassium Target 26000 J+ug/L 26000 1 YES S3VE
Selenium Target 8.3 ug/L 8.3 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 250000 J+ug/L 250000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 3.6 J ug/L 3.6 J 1 YES S3VE
Zinc Target 2.2 J ug/L 2.2 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 7 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC6 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW705i pH: 1.Sample Date: 05/31/2023 Sample Time: 12:12:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 32 ug/L 32 1 YES S3VE
Antimony Target 2.0 U ug/L 0.31 J 1 YES S3VE
Arsenic Target 74 ug/L 74 1 YES S3VE
Barium Target 37 ug/L 37 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.11 J ug/L 0.11 J 1 YES S3VE
Calcium Target 190000 ug/L 190000 D 2 YES S3VE
Chromium Target 0.80 J ug/L 0.80 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 0.62 J ug/L 0.62 J 1 YES S3VE
Iron Target 34 J ug/L 34 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 56000 J+ug/L 56000 1 YES S3VE
Manganese Target 2.8 ug/L 2.8 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 6000 J+ug/L 6000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 0.046 J ug/L 0.046 J 1 YES S3VE
Sodium Target 160000 J+ug/L 160000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.4 J ug/L 2.4 J 1 YES S3VE
Zinc Target 4.4 J ug/L 4.4 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 8 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC7 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW705s pH: 1.Sample Date: 05/31/2023 Sample Time: 11:59:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 J+ug/L 2.0 1 YES S3VE
Arsenic Target 390 ug/L 390 1 YES S3VE
Barium Target 47 ug/L 47 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 210000 ug/L 210000 D 2 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 180 J ug/L 180 J 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 52000 J+ug/L 52000 1 YES S3VE
Manganese Target 31 ug/L 31 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 57000 J+ug/L 57000 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 220000 J+ug/L 220000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 9 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC8 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW706i pH: 1.Sample Date: 05/30/2023 Sample Time: 12:18:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 14 J ug/L 14 J 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 5.0 ug/L 5.0 1 YES S3VE
Barium Target 47 ug/L 47 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 100000 ug/L 100000 1 YES S3VE
Chromium Target 2.2 ug/L 2.2 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 0.47 J ug/L 0.47 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 40000 J+ug/L 40000 1 YES S3VE
Manganese Target 3.9 ug/L 3.9 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 6500 J+ug/L 6500 1 YES S3VE
Selenium Target 3.8 J ug/L 3.8 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 170000 J+ug/L 170000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 1.4 J ug/L 1.4 J 1 YES S3VE
Zinc Target 0.95 J ug/L 0.95 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 10 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BC9 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW706s pH: 1.Sample Date: 05/30/2023 Sample Time: 12:03:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 53 J+ug/L 53 1 YES S3VE
Arsenic Target 230 ug/L 230 1 YES S3VE
Barium Target 50 ug/L 50 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.99 J ug/L 0.99 J 1 YES S3VE
Calcium Target 200000 ug/L 200000 D 2 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.052 J ug/L 0.052 J 1 YES S3VE
Copper Target 3.0 ug/L 3.0 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 0.46 J 1 YES S3VE
Magnesium Target 48000 J+ug/L 48000 1 YES S3VE
Manganese Target 35 ug/L 35 1 YES S3VE
Nickel Target 0.47 J ug/L 0.47 J 1 YES S3VE
Potassium Target 43000 J+ug/L 43000 1 YES S3VE
Selenium Target 49 ug/L 49 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 190000 J+ug/L 190000 D 2 YES S3VE
Thallium Target 2.8 ug/L 2.8 1 YES S3VE
Vanadium Target 0.96 J ug/L 0.96 J 1 YES S3VE
Zinc Target 37 ug/L 37 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 11 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BD0 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW707i pH: 1.Sample Date: 05/30/2023 Sample Time: 11:29:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 73 ug/L 73 1 YES S3VE
Antimony Target 2.0 U ug/L 0.29 J 1 YES S3VE
Arsenic Target 1.3 ug/L 1.3 1 YES S3VE
Barium Target 35 ug/L 35 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.18 J ug/L 0.18 J 1 YES S3VE
Calcium Target 160000 ug/L 160000 D 2 YES S3VE
Chromium Target 1.9 J ug/L 1.9 J 1 YES S3VE
Cobalt Target 0.10 J ug/L 0.10 J 1 YES S3VE
Copper Target 1.8 J ug/L 1.8 J 1 YES S3VE
Iron Target 120 J ug/L 120 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.31 J 1 YES S3VE
Magnesium Target 67000 J+ug/L 67000 1 YES S3VE
Manganese Target 100 ug/L 100 1 YES S3VE
Nickel Target 0.63 J ug/L 0.63 J 1 YES S3VE
Potassium Target 8900 J+ug/L 8900 1 YES S3VE
Selenium Target 2.4 J ug/L 2.4 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 180000 J+ug/L 180000 D 2 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 0.88 J ug/L 0.88 J 1 YES S3VE
Zinc Target 6.8 ug/L 6.8 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 12 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BD1 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW707s pH: 1.Sample Date: 05/30/2023 Sample Time: 11:13:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 0.29 J 1 YES S3VE
Arsenic Target 110 ug/L 110 1 YES S3VE
Barium Target 26 ug/L 26 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.15 J ug/L 0.15 J 1 YES S3VE
Calcium Target 330000 ug/L 330000 D 5 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 0.85 J ug/L 0.85 J 1 YES S3VE
Copper Target 0.94 J ug/L 0.94 J 1 YES S3VE
Iron Target 610 ug/L 610 1 YES S3VE
Lead Target 1.0 U ug/L 0.47 J 1 YES S3VE
Magnesium Target 100000 J+ug/L 100000 1 YES S3VE
Manganese Target 260 ug/L 260 1 YES S3VE
Nickel Target 1.5 ug/L 1.5 1 YES S3VE
Potassium Target 20000 J+ug/L 20000 1 YES S3VE
Selenium Target 2.1 J ug/L 2.1 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 230000 J+ug/L 230000 D 5 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.6 J ug/L 2.6 J 1 YES S3VE
Zinc Target 1.8 J ug/L 1.8 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 13 Wed, 28 Jun 2023 08:36:25
Sample Number: MH0BD2 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: MS-MW801 pH: 1.Sample Date: 05/30/2023 Sample Time: 12:33:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 96 ug/L 96 1 YES S3VE
Antimony Target 15 J+ug/L 15 1 YES S3VE
Arsenic Target 430 ug/L 430 1 YES S3VE
Barium Target 20 ug/L 20 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 340000 ug/L 340000 D 3 YES S3VE
Chromium Target 0.75 J ug/L 0.75 J 1 YES S3VE
Cobalt Target 0.17 J ug/L 0.17 J 1 YES S3VE
Copper Target 1.1 J ug/L 1.1 J 1 YES S3VE
Iron Target 160 J ug/L 160 J 1 YES S3VE
Lead Target 1.0 U ug/L 0.20 J 1 YES S3VE
Magnesium Target 160000 ug/L 160000 D 3 YES S3VE
Manganese Target 15 ug/L 15 1 YES S3VE
Nickel Target 1.0 ug/L 1.0 1 YES S3VE
Potassium Target 27000 J+ug/L 27000 1 YES S3VE
Selenium Target 34 ug/L 34 1 YES S3VE
Silver Target 0.054 J ug/L 0.054 J 1 YES S3VE
Sodium Target 270000 J+ug/L 270000 D 3 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.3 J ug/L 2.3 J 1 YES S3VE
Zinc Target 3.8 J ug/L 3.8 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 14 Wed, 28 Jun 2023 08:36:25
Sample Number: PBW01 Method: Metals by ICP-MS Matrix: Water MA Number:
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 1.0 U ug/L 1.0 U 1 YES S3VE
Barium Target 10 U ug/L 10 U 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Calcium Target 500 U ug/L 500 U 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 500 U ug/L 500 U 1 YES S3VE
Manganese Target 1.0 U ug/L 1.0 U 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 500 U ug/L 500 U 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 34 J ug/L 34 J 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BC4 Lab Name: Bonner Analytical Testing Co.
Page 15 Wed, 28 Jun 2023 08:36:25
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 1 Wed, 28 Jun 2023 08:35:23
Sample Number: LCS01 Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Spike 42 ug/L 42 1 YES S3VE
Antimony Spike 4.4 J+ug/L 4.4 1 YES S3VE
Arsenic Spike 1.9 ug/L 1.9 1 YES S3VE
Barium Spike 20 ug/L 20 1 YES S3VE
Beryllium Spike 2.0 J+ug/L 2.0 1 YES S3VE
Calcium Spike 930 ug/L 930 1 YES S3VE
Chromium Spike 4.5 ug/L 4.5 1 YES S3VE
Cobalt Spike 2.3 J+ug/L 2.3 1 YES S3VE
Copper Spike 4.4 ug/L 4.4 1 YES S3VE
Iron Spike 390 ug/L 390 1 YES S3VE
Lead Spike 2.1 J+ug/L 2.1 1 YES S3VE
Magnesium Spike 980 J+ug/L 980 1 YES S3VE
Manganese Spike 2.1 ug/L 2.1 1 YES S3VE
Nickel Spike 2.4 ug/L 2.4 1 YES S3VE
Potassium Spike 980 ug/L 980 1 YES S3VE
Selenium Spike 9.2 ug/L 9.2 1 YES S3VE
Silver Spike 2.0 ug/L 2.0 1 YES S3VE
Sodium Spike 980 J+ug/L 980 1 YES S3VE
Thallium Spike 2.0 ug/L 2.0 1 YES S3VE
Vanadium Spike 11 ug/L 11 1 YES S3VE
Zinc Spike 9.3 ug/L 9.3 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 2 Wed, 28 Jun 2023 08:35:23
Sample Number: LCS02 Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Cadmium Spike 0.40 ug/L 0.40 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 3 Wed, 28 Jun 2023 08:35:23
Sample Number: MH0BD3 Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: MS-SW201 pH: 1.Sample Date: 06/02/2023 Sample Time: 12:52:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 11 J ug/L 11 J 1 YES S3VE
Antimony Target 2.0 U ug/L 0.40 J 1 YES S3VE
Arsenic Target 5.1 ug/L 5.1 1 YES S3VE
Barium Target 46 ug/L 46 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.20 U ug/L 0.20 U 1 YES S3VE
Calcium Target 67000 ug/L 67000 1 YES S3VE
Chromium Target 0.47 J ug/L 0.47 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 0.14 J 1 YES S3VE
Copper Target 1.6 J ug/L 1.6 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 29000 J+ug/L 29000 1 YES S3VE
Manganese Target 28 ug/L 28 1 YES S3VE
Nickel Target 0.72 J ug/L 0.72 J 1 YES S3VE
Potassium Target 7800 ug/L 7800 1 YES S3VE
Selenium Target 1.9 J ug/L 1.9 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 96000 J+ug/L 96000 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.5 J ug/L 2.5 J 1 YES S3VE
Zinc Target 3.2 J ug/L 3.2 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 4 Wed, 28 Jun 2023 08:35:23
Sample Number: MH0BD3D Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: 1.Sample Date: 06/02/2023 Sample Time: 12:52:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 0.31 J 1 YES S3VE
Arsenic Target 4.9 ug/L 4.9 1 YES S3VE
Barium Target 45 ug/L 45 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.20 U ug/L 0.20 U 1 YES S3VE
Calcium Target 62000 ug/L 62000 1 YES S3VE
Chromium Target 0.36 J ug/L 0.36 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 0.14 J 1 YES S3VE
Copper Target 1.4 J ug/L 1.4 J 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 27000 J+ug/L 27000 1 YES S3VE
Manganese Target 25 ug/L 25 1 YES S3VE
Nickel Target 0.69 J ug/L 0.69 J 1 YES S3VE
Potassium Target 7300 ug/L 7300 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 89000 J+ug/L 89000 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.4 J ug/L 2.4 J 1 YES S3VE
Zinc Target 3.1 J ug/L 3.1 J 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 5 Wed, 28 Jun 2023 08:35:23
Sample Number: MH0BD3L Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: 1.Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 100 U ug/L 100 U 5 YES S3VE
Antimony Target 10 U ug/L 10 U 5 YES S3VE
Arsenic Target 4.3 J ug/L 4.3 J 5 YES S3VE
Barium Target 41 J ug/L 41 J 5 YES S3VE
Beryllium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Cadmium Target 1.0 U ug/L 1.0 U 5 YES S3VE
Calcium Target 57000 ug/L 57000 5 YES S3VE
Chromium Target 10 U ug/L 10 U 5 YES S3VE
Cobalt Target 5.0 U ug/L 5.0 U 5 YES S3VE
Copper Target 1.3 J ug/L 1.3 J 5 YES S3VE
Iron Target 1000 U ug/L 1000 U 5 YES S3VE
Lead Target 5.0 U ug/L 5.0 U 5 YES S3VE
Magnesium Target 24000 J+ug/L 24000 5 YES S3VE
Manganese Target 24 ug/L 24 5 YES S3VE
Nickel Target 5.0 U ug/L 5.0 U 5 YES S3VE
Potassium Target 6800 ug/L 6800 5 YES S3VE
Selenium Target 25 U ug/L 25 U 5 YES S3VE
Silver Target 5.0 U ug/L 5.0 U 5 YES S3VE
Sodium Target 86000 J+ug/L 86000 5 YES S3VE
Thallium Target 5.0 U ug/L 5.0 U 5 YES S3VE
Vanadium Target 2.4 J ug/L 2.4 J 5 YES S3VE
Zinc Target 3.8 J ug/L 3.8 J 5 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 6 Wed, 28 Jun 2023 08:35:23
Sample Number: MH0BD3S Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: 1.Sample Date: 06/02/2023 Sample Time: 12:52:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Antimony Spike 110 J+ug/L 110 1 YES S3VE
Arsenic Spike 45 ug/L 45 1 YES S3VE
Barium Spike 1900 ug/L 1900 1 YES S3VE
Beryllium Spike 50 J+ug/L 50 1 YES S3VE
Cadmium Spike 48 ug/L 48 1 YES S3VE
Chromium Spike 200 ug/L 200 1 YES S3VE
Cobalt Spike 500 J+ug/L 500 1 YES S3VE
Copper Spike 250 ug/L 250 1 YES S3VE
Lead Spike 18 J+ug/L 18 1 YES S3VE
Manganese Spike 490 ug/L 490 1 YES S3VE
Nickel Spike 490 ug/L 490 1 YES S3VE
Selenium Spike 100 ug/L 100 1 YES S3VE
Silver Spike 41 ug/L 41 1 YES S3VE
Thallium Spike 46 ug/L 46 1 YES S3VE
Vanadium Spike 500 ug/L 500 1 YES S3VE
Zinc Spike 480 ug/L 480 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 7 Wed, 28 Jun 2023 08:35:23
Sample Number: MH0BD4 Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: MS-SW202 pH: 1.Sample Date: 06/02/2023 Sample Time: 12:28:00
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 0.45 J 1 YES S3VE
Arsenic Target 6.4 ug/L 6.4 1 YES S3VE
Barium Target 49 ug/L 49 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.20 U ug/L 0.20 U 1 YES S3VE
Calcium Target 73000 ug/L 73000 1 YES S3VE
Chromium Target 0.46 J ug/L 0.46 J 1 YES S3VE
Cobalt Target 1.0 U ug/L 0.17 J 1 YES S3VE
Copper Target 2.9 ug/L 2.9 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 30000 J+ug/L 30000 1 YES S3VE
Manganese Target 24 ug/L 24 1 YES S3VE
Nickel Target 0.83 J ug/L 0.83 J 1 YES S3VE
Potassium Target 10000 ug/L 10000 1 YES S3VE
Selenium Target 2.1 J ug/L 2.1 J 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 110000 J+ug/L 110000 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 2.7 J ug/L 2.7 J 1 YES S3VE
Zinc Target 8.8 ug/L 8.8 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 8 Wed, 28 Jun 2023 08:35:23
Sample Number: PBW01 Method: Metals by ICP-MS Matrix: Water MA Number: 3077.0
Sample Location: pH: Sample Date: Sample Time:
% Moisture: % Solids: 0.0
Analyte Name Analyte Type Validation Result Validation Flag Units Lab Result Lab Flag Dilution Factor Reportable Validation Level
Aluminum Target 20 U ug/L 20 U 1 YES S3VE
Antimony Target 2.0 U ug/L 2.0 U 1 YES S3VE
Arsenic Target 1.0 U ug/L 1.0 U 1 YES S3VE
Barium Target 10 U ug/L 10 U 1 YES S3VE
Beryllium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Cadmium Target 0.20 U ug/L 0.20 U 1 YES S3VE
Calcium Target 500 U ug/L 500 U 1 YES S3VE
Chromium Target 2.0 U ug/L 2.0 U 1 YES S3VE
Cobalt Target 1.0 U ug/L 1.0 U 1 YES S3VE
Copper Target 2.0 U ug/L 2.0 U 1 YES S3VE
Iron Target 200 U ug/L 200 U 1 YES S3VE
Lead Target 1.0 U ug/L 1.0 U 1 YES S3VE
Magnesium Target 500 U ug/L 500 U 1 YES S3VE
Manganese Target 1.0 U ug/L 1.0 U 1 YES S3VE
Nickel Target 1.0 U ug/L 1.0 U 1 YES S3VE
Potassium Target 500 U ug/L 500 U 1 YES S3VE
Selenium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Silver Target 1.0 U ug/L 1.0 U 1 YES S3VE
Sodium Target 500 U ug/L 500 U 1 YES S3VE
Thallium Target 1.0 U ug/L 1.0 U 1 YES S3VE
Vanadium Target 5.0 U ug/L 5.0 U 1 YES S3VE
Zinc Target 5.0 U ug/L 5.0 U 1 YES S3VE
Sample Summary Report
Project Name: MIDVALE SLAG Project GroupID: 50760/68HERH20D0009/MH0BD3 Lab Name: Bonner Analytical Testing Co.
Page 9 Wed, 28 Jun 2023 08:35:23

Appendix D:
Trend Analysis Results
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503s MW-504s MW-505s
Sampling Sampling
Event Date
1 Oct-14 0.45 0.45 0.45
2 Apr-15 0.45 0.45 2.4
3 Sep-15 0.45 0.45 1
4 Mar-16 0.64 0.89 1.6
5 Sep-16 0.45 0.45 0.45
6 Mar-17 0.45 0.45 2.1
7 Sep-17 0.45 0.45 0.45
8 May-19 0.45 0.45 2.1
9 May-21 0.45 0.45 4.7
10 May-23 0.45 0.45 4.5
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.13 0.28 0.79
Mann-Kendall Statistic (S):-3 -3 17
Confidence Factor:56.9% 56.9% 92.2%
Concentration Trend:Stable Stable Prob. Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
ANTIMONY CONCENTRATION (ug/L)
May-2023
Midvale Slag Antimony
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
T. Howes
Shallow Upgradient Monitoring Wells
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503s
MW-504s
MW-505s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506s MW-507s
Sampling Sampling
Event Date
1 Oct-14 0.45 0.45
2 Apr-15 0.45 0.55
3 Sep-15 0.45 0.45
4 Mar-16 1.5 1.3
5 Sep-16 0.45 0.45
6 Mar-17 0.45 0.45
7 Sep-17 0.45 0.45
8 May-19 0.45 0.45
9 May-21 0.45 0.45
10 May-23 0.45 0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.60 0.49
Mann-Kendall Statistic (S):-3 -9
Confidence Factor:56.9% 75.8%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Downgradient Monitoring Wells
Midvale Slag Antimony
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506s
MW-507s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601s MW-602s
Sampling Sampling
Event Date
1 Oct-14 6.1 17.5
2 Apr-15 8.3 21.2
3 Sep-15 6.5 17.8
4 Mar-16 8.1 19.4
5 Sep-16 6.3 16.7
6 Mar-17 7.4 17.4
7 Sep-17 7.1 19.4
8 May-19 9.2 17.5
9 May-21 7.3 16
10 May-23 7.8 16
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.13 0.09
Mann-Kendall Statistic (S):11 -20
Confidence Factor:81.0% 95.5%
Concentration Trend:No Trend Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Plume Core Monitoring Wells
Midvale Slag Antimony
T. Howes
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601s
MW-602s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701s MW-702s MW-703s MW-704s MW-705s MW-706s MW-707s
Sampling Sampling
Event Date
1 Oct-14 0.85 0.45 1.5 1 1.8 58.7
0.45
2 Apr-15 1.2 0.45 2.2 1.2 2.3 78
0.52
3 Sep-15 1.1 0.45 1.8 1.2 2.7 65.4
0.45
4 Mar-16 2.2 1.5 2.2 1.5 2.5 61.2
1.1
5 Sep-16 0.45 0.45 0.45 0.45 2.1 62.6
0.45
6 Mar-17 0.45 0.45 0.45 0.45 0.45 62.1
0.45
7 Sep-17 0.45 0.45 0.45 0.45 2.1 63.7
0.45
8 May-19 0.45 2.1 0.45 3 2.2 57.9
0.45
9 May-21 1.3 0.45 1.9 1.3 2 62
0.45
10 May-23 0.72 0.45 2.2 0.45 2 53
0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.61 0.81 0.60 0.71 0.30 0.10 0.39
Mann-Kendall Statistic (S):-73-2-2-11-17-9
Confidence Factor:70.0% 56.9% 53.5% 53.5% 81.0% 92.2% 75.8%
Concentration Trend:Stable No Trend Stable Stable Stable Prob. Decreasing Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow ACL Monitoring Wells
Midvale Slag Antimony
T. Howes
0.1
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701s
MW-702s
MW-703s
MW-704s
MW-705s
MW-706s
MW-707s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:SW-201 SW-202
Sampling Sampling
Event Date
1 Oct-14 0.48 0.47
2 Apr-15 1 0.97
3 Sep-15 0.75 0.74
4 Mar-16 1.2 1.1
5 Sep-16 0.14 0.14
6 Mar-17 0.14 0.14
7 Sep-17 0.14 0.14
8 May-19 0.14 0.14
9 May-21 0.57 0.69
10 May-23 0.14 0.14
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.85 0.82
Mann-Kendall Statistic (S):-15 -15
Confidence Factor:89.2% 89.2%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Surface Water
Midvale Slag Antimony
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
SW-201
SW-202
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503s MW-504s MW-505s
Sampling Sampling
Event Date
1 Oct-14 1.2 0.94 8.6
2 Apr-15 0.47 0.89 8.8
3 Sep-15 0.47 0.7 7.8
4 Mar-16 0.73 0.81 7.4
5 Sep-16 0.47 0.91 9.6
6 Mar-17 0.47 0.47 16.1
7 Sep-17 0.75 0.8 8.6
8 May-19 0.47 0.47 12.3
9 May-21 3 0.8 32
10 May-23 3.6 0.47 28
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:1.00 0.26 0.64
Mann-Kendall Statistic (S):13 -23 24
Confidence Factor:85.4% 97.7% 98.2%
Concentration Trend:No Trend Decreasing Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Upgradient Monitoring Wells
Midvale Slag Arsenic
T. Howes
0.1
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503s
MW-504s
MW-505s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506s MW-507s
Sampling Sampling
Event Date
1 Oct-14 7.2 37.9
2 Apr-15 9.2 21.8
3 Sep-15 32.1 31.9
4 Mar-16 2.1 13.5
5 Sep-16 3.1 8.9
6 Mar-17 8.7 18.9
7 Sep-17 37 18.7
8 May-19 7.3 8.1
9 May-21 20 4.2
10 May-23 14 14
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.85 0.60
Mann-Kendall Statistic (S):11 -27
Confidence Factor:81.0% 99.2%
Concentration Trend:No Trend Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Downgradient Monitoring Wells
Midvale Slag Arsenic
T. Howes
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506s
MW-507s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601s MW-602s
Sampling Sampling
Event Date
1 Oct-14 2170 622
2 Apr-15 2140 646
3 Sep-15 3300 550
4 Mar-16 2910 582
5 Sep-16 4600 510
6 Mar-17 4260 522
7 Sep-17 3850 525
8 May-19 3850 421
9 May-21 7400 460
10 May-23 4000 430
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.39 0.14
Mann-Kendall Statistic (S):24 -31
Confidence Factor:98.2% 99.8%
Concentration Trend:Increasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Plume Core Monitoring Wells
Midvale Slag Arsenic
T. Howes
1
10
100
1000
10000
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601s
MW-602s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701s MW-702s MW-703s MW-704s MW-705s MW-706s MW-707s
Sampling Sampling
Event Date
1 Oct-14 13.9 27.9 630 753 405 185
44.8
2 Apr-15 12 55.2 725 692 404 166
43.8
3 Sep-15 13.6 2.8 695 653 360 198
42.8
4 Mar-16 12.1 43.4 767 652 387 202
40.5
5 Sep-16 12.8 3.6 649 553 404 215
18.7
6 Mar-17 11.9 11.7 784 644 412 230
39.5
7 Sep-17 11.9 2.2 734 680 417 251
131
8 May-19 7.8 844 497 538 346 186
31.3
9 May-21 11 18 2100 590 430 190
86
10 May-23 9.4 12 2800 590 390 230
110
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.16 2.56 0.74 0.11 0.07 0.13 0.63
Mann-Kendall Statistic (S):-32 -3 19 -26 6 20 1
Confidence Factor:99.9% 56.9% 94.6% 98.9% 66.8% 95.5% 50.0%
Concentration Trend:Decreasing No Trend Prob. Increasing Decreasing No Trend Increasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow ACL Monitoring Wells
Midvale Slag Arsenic
T. Howes
1
10
100
1000
10000
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701s
MW-702s
MW-703s
MW-704s
MW-705s
MW-706s
MW-707s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:SW-201 SW-202
Sampling Sampling
Event Date
1 Oct-14 9.2 8.6
2 Apr-15 8.8 99.8
3 Sep-15 11.5 10.7
4 Mar-16 10 9
5 Sep-16 9.7 9.9
6 Mar-17 11.1 10.5
7 Sep-17 12.8 11.3
8 May-19 7.2 7
9 May-21 11 10
10 May-23 5.1 6.4
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.23 1.57
Mann-Kendall Statistic (S):-3 -11
Confidence Factor:56.9% 81.0%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Surface Water
Midvale Slag Arsenic
T. Howes
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
SW-201
SW-202
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503s MW-504s MW-505s
Sampling Sampling
Event Date
1 Oct-14 0.53 0.19 0.09
2 Apr-15 0.09 0.18 1.1
3 Sep-15 0.09 0.16 0.47
4 Mar-16 0.14 0.22 0.09
5 Sep-16 0.09 0.37 1.7
6 Mar-17 0.09 0.09 2.4
7 Sep-17 0.09 0.19 2
8 May-19 0.09 0.12 4.7
9 May-21 0.09 0.12 5.7
10 May-23 0.09 0.09 8
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.99 0.48 1.01
Mann-Kendall Statistic (S):-13 -18 36
Confidence Factor:85.4% 93.4% >99.9%
Concentration Trend:Stable Prob. Decreasing Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Upgradient Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503s
MW-504s
MW-505s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506s MW-507s
Sampling Sampling
Event Date
1 Oct-14 0.09 0.17
2 Apr-15 0.37 0.17
3 Sep-15 0.09 0.09
4 Mar-16 0.07 0.17
5 Sep-16 0.09 0.09
6 Mar-17 0.09 0.09
7 Sep-17 0.09 0.09
8 May-19 0.09 0.09
9 May-21 0.09 0.09
10 May-23 0.09 0.09
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.77 0.34
Mann-Kendall Statistic (S):-3 -19
Confidence Factor:56.9% 94.6%
Concentration Trend:Stable Prob. Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Downgradient Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506s
MW-507s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601s MW-602s
Sampling Sampling
Event Date
1 Oct-14 454 0.24
2 Apr-15 572 0.08
3 Sep-15 485 0.09
4 Mar-16 541 0.15
5 Sep-16 444 0.19
6 Mar-17 474 0.09
7 Sep-17 440 0.09
8 May-19 517 0.09
9 May-21 460 0.11
10 May-23 460 0.09
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.09 0.44
Mann-Kendall Statistic (S):-10 -5
Confidence Factor:78.4% 63.6%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Plume Core Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
10
100
1000
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601s
MW-602s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701s MW-702s MW-703s MW-704s MW-705s MW-706s MW-707s
Sampling Sampling
Event Date
1 Oct-14 0.4 0.044 0.08 0.47 0.035 1.2 0.24
2 Apr-15 0.34 0.09 0.09 0.067 0.09 0.69 0.18
3 Sep-15 0.44 0.1 0.09 0.47 0.09 0.75 0.22
4 Mar-16 0.35 0.09 0.1 0.14 0.09 1.4 0.15
5 Sep-16 0.32 0.09 0.09 0.47 0.09 0.53 0.17
6 Mar-17 0.33 0.09 0.09 0.47 0.09 1.2 0.17
7 Sep-17 0.42 0.09 0.09 0.47 0.09 0.09 0.09
8 May-19 0.29 0.09 0.34 0.66 0.09 0.85 0.2
9 May-21 0.43 0.09 0.09 0.25 0.09 0.64 0.68
10 May-23 0.37 0.09 0.09 0.36 0.09 0.99 0.15
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.14 0.18 0.69 0.47 0.21 0.46 0.73
Mann-Kendall Statistic (S):-3 3 10 5 9 -6 -9
Confidence Factor:56.9% 56.9% 78.4% 63.6% 75.8% 66.8% 75.8%
Concentration Trend:Stable No Trend No Trend No Trend No Trend Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow ACL Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701s
MW-702s
MW-703s
MW-704s
MW-705s
MW-706s
MW-707s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:SW-201 SW-202
Sampling Sampling
Event Date
1 Oct-14 0.038 0.048
2 Apr-15 0.016 0.073
3 Sep-15 0.016 0.04
4 Mar-16 0.04 0.05
5 Sep-16 0.04 0.1
6 Mar-17 0.016 0.016
7 Sep-17 0.016 0.016
8 May-19 0.016 0.016
9 May-21 0.016 0.16
10 May-23 0.016 0.016
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.49 0.88
Mann-Kendall Statistic (S):-11 -9
Confidence Factor:81.0% 75.8%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Surface Water
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
SW-201
SW-202
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503s MW-504s MW-505s
Sampling Sampling
Event Date
1 Oct-14 0.4 5.6 0.71
2 Apr-15 0.78 5.8 1.4
3 Sep-15 0.4 5.4 2.2
4 Mar-16 0.4 6 2.8
5 Sep-16 0.4 5.8 0.4
6 Mar-17 1.8 7.6 1.9
7 Sep-17 0.4 6.1 0.4
8 May-19 0.4 4.8 0.4
9 May-21 0.4 5.7 0.4
10 May-23 0.4 6 0.4
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.77 0.12 0.83
Mann-Kendall Statistic (S):-5 7 -17
Confidence Factor:63.6% 70.0% 92.2%
Concentration Trend:Stable No Trend Prob. Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Upgradient Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503s
MW-504s
MW-505s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506s MW-507s
Sampling Sampling
Event Date
1 Oct-14 0.4 0.4
2 Apr-15 0.4 0.4
3 Sep-15 1.6 0.4
4 Mar-16 0.4 0.4
5 Sep-16 0.4 0.4
6 Mar-17 0.67 0.4
7 Sep-17 0.4 0.4
8 May-19 0.4 0.4
9 May-21 0.4 0.4
10 May-23 0.4 0.4
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.69 0.00
Mann-Kendall Statistic (S):-5 0
Confidence Factor:63.6% 45.6%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Downgradient Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506s
MW-507s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601s MW-602s
Sampling Sampling
Event Date
1 Oct-14 20.6 7.9
2 Apr-15 14.6 32.5
3 Sep-15 19.4 31.3
4 Mar-16 19.7 56.5
5 Sep-16 31.6 29.7
6 Mar-17 35.8 23.6
7 Sep-17 23.5 19.8
8 May-19 25.4 39.9
9 May-21 29 43
10 May-23 22 34
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.26 0.42
Mann-Kendall Statistic (S):17 9
Confidence Factor:92.2% 75.8%
Concentration Trend:Prob. Increasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow Plume Core Monitoring Wells
Midvale Slag Selenium
T. Howes
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601s
MW-602s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701s MW-702s MW-703s MW-704s MW-705s MW-706s MW-707s
Sampling Sampling
Event Date
1 Oct-14 67.8 3.4 28.1 7.7 0.4 43.6 1.2
2 Apr-15 16.5 2.1 22.2 11.3 0.42 28.7 3.5
3 Sep-15 29.4 24 22.4 8.9 0.4 60.4 2.2
4 Mar-16 12.3 3.6 21.1 21.6 0.4 46.6 3.3
5 Sep-16 27.7 21.3 26.5 11.3 0.4 65.4 16.9
6 Mar-17 23.2 0.4 29.9 14.1 0.53 53.7 0.4
7 Sep-17 36.8 26.1 24.3 5.1 0.4 45.6 3.3
8 May-19 7.6 21 8.7 9.7 0.4 45.2 1
9 May-21 7.4 0.4 27 13 0.4 16 0.4
10 May-23 4.4 0.4 25 8.3 0.4 49 2.1
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.81 1.09 0.25 0.41 0.10 0.32 1.42
Mann-Kendall Statistic (S):-25-810-5-3-11
Confidence Factor:98.6% 72.9% 50.0% 45.6% 63.6% 56.9% 81.0%
Concentration Trend:Decreasing No Trend No Trend Stable Stable Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Shallow ACL Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701s
MW-702s
MW-703s
MW-704s
MW-705s
MW-706s
MW-707s
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:SW-201 SW-202
Sampling Sampling
Event Date
1 Oct-14 2.4 1.6
2 Apr-15 2.5 1.6
3 Sep-15 1.1 0.5
4 Mar-16 3.3 3.1
5 Sep-16 2.4 2.4
6 Mar-17 3.6 3.1
7 Sep-17 0.88 0.36
8 May-19 1.7 1.7
9 May-21 2.8 2.4
10 May-23 1.9 2.1
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.39 0.50
Mann-Kendall Statistic (S):-2 6
Confidence Factor:53.5% 66.8%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Surface Water
Midvale Slag Selenium
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
SW-201
SW-202
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503i MW-504i MW-505i
Sampling Sampling
Event Date
1 Oct-14 0.45 0.45 0.45
2 Apr-15 0.45 0.45 0.57
3 Sep-15 0.46 0.45 0.45
4 Mar-16 1.1 0.83 0.98
5 Sep-16 0.45 0.45 0.45
6 Mar-17 0.45 0.45 0.45
7 Sep-17 0.45 0.45 0.45
8 May-19 0.45 0.45 0.45
9 May-21 0.45 0.45 0.45
10 May-23 0.45 0.45 0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.40 0.25 0.33
Mann-Kendall Statistic (S):-7 -3 -9
Confidence Factor:70.0% 56.9% 75.8%
Concentration Trend:Stable Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
ANTIMONY CONCENTRATION (ug/L)
May-2023
Midvale Slag Antimony
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
T. Howes
Intermediate Upgradient Monitoring Wells
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503i
MW-504i
MW-505i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506i MW-507i
Sampling Sampling
Event Date
1 Oct-14 0.45 0.45
2 Apr-15 0.56 0.61
3 Sep-15 0.45 0.45
4 Mar-16 1.1 1.4
5 Sep-16 0.45 0.45
6 Mar-17 0.45 0.45
7 Sep-17 0.45 0.45
8 May-19 0.45 0.45
9 May-21 0.45 0.45
10 May-23 0.45 0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.39 0.53
Mann-Kendall Statistic (S):-9 -9
Confidence Factor:75.8% 75.8%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Downgradient Monitoring Wells
Midvale Slag Antimony
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506i
MW-507i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601i MW-602i
Sampling Sampling
Event Date
1 Oct-14 1 0.67
2 Apr-15 1.9 1.1
3 Sep-15 1.2 0.98
4 Mar-16 3.2 2
5 Sep-16 0.45 0.45
6 Mar-17 0.45 0.45
7 Sep-17 0.45 0.45
8 May-19 2.1 0.45
9 May-21 1.3 0.83
10 May-23 0.45 0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.73 0.63
Mann-Kendall Statistic (S):-7 -15
Confidence Factor:70.0% 89.2%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Plume Core Monitoring Wells
Midvale Slag Antimony
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601i
MW-602i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701i MW-702i MW-703i MW-704i MW-705i MW-706i MW-707i
Sampling Sampling
Event Date
1 Oct-14 0.45 0.45 0.45 0.45 0.45 0.45 0.45
2 Apr-15 0.45 0.45 0.45 0.45 0.92 0.45 0.45
3 Sep-15 0.45 0.45 1.1 0.45 0.53 0.45 0.51
4 Mar-16 0.88 1.5 1.5 0.58 1 0.77 1.1
5 Sep-16 0.45 0.45 0.45 0.45 0.45 0.45 0.45
6 Mar-17 0.45 0.45 0.45 0.45 0.45 0.45 0.45
7 Sep-17 0.45 0.45 0.45 0.45 0.45 0.45 0.45
8 May-19 0.45 0.45 0.45 0.45 0.45 0.45 0.45
9 May-21 0.45 0.45 0.45 0.45 0.46 0.45 0.45
10 May-23 0.45 0.45 0.45 0.45 0.45 0.45 0.45
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.28 0.60 0.60 0.09 0.38 0.21 0.39
Mann-Kendall Statistic (S):-3 -3 -7 -3 -10 -3 -7
Confidence Factor:56.9% 56.9% 70.0% 56.9% 78.4% 56.9% 70.0%
Concentration Trend:Stable Stable Stable Stable Stable Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ANTIMONY CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate ACL Monitoring Wells
Midvale Slag Antimony
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701i
MW-702i
MW-703i
MW-704i
MW-705i
MW-706i
MW-707i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503i MW-504i MW-505i
Sampling Sampling
Event Date
1 Oct-14 0.61 0.75 0.62
2 Apr-15 0.52 0.47 0.47
3 Sep-15 0.55 0.6 0.47
4 Mar-16 0.74 0.46 0.55
5 Sep-16 0.94 0.59 0.55
6 Mar-17 0.47 0.47 0.47
7 Sep-17 12.7 0.56 0.53
8 May-19 0.47 0.47 0.47
9 May-21 0.57 0.47 0.92
10 May-23 0.47 0.47 0.47
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:2.12 0.18 0.25
Mann-Kendall Statistic (S):-6 -15 -4
Confidence Factor:66.8% 89.2% 60.3%
Concentration Trend:No Trend Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Upgradient Monitoring Wells
Midvale Slag Arsenic
T. Howes
0.1
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503i
MW-504i
MW-505i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506i MW-507i
Sampling Sampling
Event Date
1 Oct-14 0.66 1.1
2 Apr-15 0.51 2.6
3 Sep-15 0.47 1.1
4 Mar-16 0.52 0.72
5 Sep-16 0.62 1.8
6 Mar-17 0.47 0.47
7 Sep-17 0.86 1.1
8 May-19 0.47 0.47
9 May-21 0.48 1.1
10 May-23 0.47 0.47
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.23 0.62
Mann-Kendall Statistic (S):-11 -18
Confidence Factor:81.0% 93.4%
Concentration Trend:Stable Prob. Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Downgradient Monitoring Wells
Midvale Slag Arsenic
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506i
MW-507i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601i MW-602i
Sampling Sampling
Event Date
1 Oct-14 291 10.2
2 Apr-15 612 11.5
3 Sep-15 286 10.3
4 Mar-16 1040 12
5 Sep-16 261 10.1
6 Mar-17 914 11.4
7 Sep-17 1080 10.1
8 May-19 1760 13.7
9 May-21 1800 41
10 May-23 2100 48
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.67 0.80
Mann-Kendall Statistic (S):31 20
Confidence Factor:99.8% 95.5%
Concentration Trend:Increasing Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Plume Core Monitoring Wells
Midvale Slag Arsenic
T. Howes
1
10
100
1000
10000
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601i
MW-602i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701i MW-702i MW-703i MW-704i MW-705i MW-706i MW-707i
Sampling Sampling
Event Date
1 Oct-14 0.8 0.84
1 0.81 108 4.5 1.5
2 Apr-15 0.54 0.69
1.4 0.57 8.7 4 1.6
3 Sep-15 0.66 0.61
4.6 0.73 87 4.6 1.4
4 Mar-16 0.66 0.59
5.7 0.65 96.1 4.8 1.3
5 Sep-16 0.66 0.65
0.98 0.71 89.3 4.1 1.5
6 Mar-17 0.47 0.47
1.4 0.47 89.1 5.7 1.4
7 Sep-17 0.47 0.47
2.8 0.47 89.8 4.8 1.6
8 May-19 0.47 0.45
0.96 41.4 70.2 4.7 1.1
9 May-21 0.61 0.77
1.4 0.65 84 4.4 1.1
10 May-23 0.47 0.47
1.1 0.62 74 5 1.3
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.20 0.23 0.80 2.74 0.34 0.10 0.13
Mann-Kendall Statistic (S):-22 -22 -6 -9 -13 14 -18
Confidence Factor:97.1% 97.1% 66.8% 75.8% 85.4% 87.3% 93.4%
Concentration Trend:Decreasing Decreasing Stable No Trend Stable No Trend Prob. Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
ARSENIC CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate ACL Monitoring Wells
Midvale Slag Arsenic
T. Howes
0.1
1
10
100
1000
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701i
MW-702i
MW-703i
MW-704i
MW-705i
MW-706i
MW-707i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503i MW-504i MW-505i
Sampling Sampling
Event Date
1 Oct-14 0.21 0.083 0.11
2 Apr-15 0.09 0.09 0.09
3 Sep-15 0.09 0.09 0.09
4 Mar-16 0.09 0.07 0.09
5 Sep-16 0.09 0.09 0.09
6 Mar-17 0.09 0.09 0.09
7 Sep-17 0.09 0.09 0.09
8 May-19 0.09 0.09 0.09
9 May-21 0.09 0.13 0.09
10 May-23 0.09 0.09 0.09
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.37 0.16 0.07
Mann-Kendall Statistic (S):-9 16 -9
Confidence Factor:75.8% 90.7% 75.8%
Concentration Trend:Stable Prob. Increasing Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediated Upgradient Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503i
MW-504i
MW-505i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506i MW-507i
Sampling Sampling
Event Date
1 Oct-14 0.029 0.31
2 Apr-15 0.09 0.48
3 Sep-15 0.09 0.24
4 Mar-16 0.09 0.53
5 Sep-16 0.09 0.22
6 Mar-17 0.09 0.22
7 Sep-17 0.31 0.13
8 May-19 0.09 0.33
9 May-21 0.42 0.35
10 May-23 0.09 0.33
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.89 0.39
Mann-Kendall Statistic (S):18 -3
Confidence Factor:93.4% 56.9%
Concentration Trend:Prob. Increasing Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Downgradient Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506i
MW-507i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601i MW-602i
Sampling Sampling
Event Date
1 Oct-14 0.15 0.15
2 Apr-15 0.09 0.09
3 Sep-15 0.11 0.09
4 Mar-16 0.07 0.17
5 Sep-16 0.5 0.09
6 Mar-17 0.09 0.09
7 Sep-17 0.09 0.09
8 May-19 0.22 0.09
9 May-21 0.09 0.34
10 May-23 0.09 0.09
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.87 0.62
Mann-Kendall Statistic (S):-5 -2
Confidence Factor:63.6% 53.5%
Concentration Trend:Stable Stable
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Plume Core Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601i
MW-602i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701i MW-702i MW-703i MW-704i MW-705i MW-706i MW-707i
Sampling Sampling
Event Date
1 Oct-14 0.09 0.09 0.09 0.09 0.09 0.16 0.29
2 Apr-15 0.09 0.09 0.09 0.09 0.09 0.09 0.09
3 Sep-15 0.09 0.09 0.53 0.09 0.09 0.09 0.38
4 Mar-16 0.09 0.09 0.3 0.09 0.09 0.09 0.09
5 Sep-16 0.09 0.09 0.09 0.09 0.09 0.09 0.11
6 Mar-17 0.09 0.09 0.09 0.09 0.09 0.09 0.09
7 Sep-17 0.09 0.09 0.17 0.09 0.09 0.09 0.09
8 May-19 0.09 0.09 0.09 0.09 0.09 0.09 0.09
9 May-21 0.09 0.09 0.09 0.09 0.09 0.25 0.56
10 May-23 0.09 0.09 0.09 0.09 0.11 0.09 0.18
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.00 0.00 0.89 0.00 0.07 0.47 0.83
Mann-Kendall Statistic (S):00-809-11
Confidence Factor:45.6% 45.6% 72.9% 45.6% 75.8% 50.0% 50.0%
Concentration Trend:Stable Stable Stable Stable No Trend Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
CADMIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate ACL Monitoring Wells
Midvale Slag Cadmium
T. Howes
0.01
0.1
1
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-701i
MW-702i
MW-703i
MW-704i
MW-705i
MW-706i
MW-707i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-503i MW-504i MW-505i
Sampling Sampling
Event Date
1 Oct-14 3.6 6.3 1.8
2 Apr-15 3.5 5.7 1.4
3 Sep-15 3.3 6.3 1.9
4 Mar-16 3.3 7 2.5
5 Sep-16 4.9 7.7 2.9
6 Mar-17 4.2 7.5 3.3
7 Sep-17 0.64 8.1 0.4
8 May-19 2.8 5.3 1.9
9 May-21 2.6 6.3 2.6
10 May-23 4.1 6.2 3.6
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.35 0.14 0.43
Mann-Kendall Statistic (S):-10 2 20
Confidence Factor:78.4% 53.5% 95.5%
Concentration Trend:Stable No Trend Increasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Upgradient Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-503i
MW-504i
MW-505i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-506i MW-507i
Sampling Sampling
Event Date
1 Oct-14 4.5 0.63
2 Apr-15 3.7 2.6
3 Sep-15 5.9 0.89
4 Mar-16 4.9 3.9
5 Sep-16 6.3 1.6
6 Mar-17 5.7 0.4
7 Sep-17 6.7 0.4
8 May-19 4.3 1.9
9 May-21 4.6 2.5
10 May-23 4 3.7
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.20 0.70
Mann-Kendall Statistic (S):-1 8
Confidence Factor:50.0% 72.9%
Concentration Trend:Stable No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Downgradient Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-506i
MW-507i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-601i MW-602i
Sampling Sampling
Event Date
1 Oct-14 12.8 6.4
2 Apr-15 9.6 7.5
3 Sep-15 12.6 6.5
4 Mar-16 14.6 11.1
5 Sep-16 18.8 10.4
6 Mar-17 21 10.5
7 Sep-17 24.7 9.9
8 May-19 16.7 7
9 May-21 20 8.7
10 May-23 18 8.1
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.27 0.21
Mann-Kendall Statistic (S):23 5
Confidence Factor:97.7% 63.6%
Concentration Trend:Increasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate Plume Core Monitoring Wells
Midvale Slag Selenium
T. Howes
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
L
)
Sampling Date
MW-601i
MW-602i
Evaluation Date:Job ID:
Facility Name: Constituent:
Conducted By: Concentration Units:ug/L
Sampling Point ID:MW-701i MW-702i MW-703i MW-704i MW-705i MW-706i MW-707i
Sampling Sampling
Event Date
1 Oct-14 5.3 12.2 4.9 1.8 2.2 2.3
1.1
2 Apr-15 7.3 11.5 4 1.4 2 3.4
0.54
3 Sep-15 7.1 15.3 2.8 1.8 2.1 3.3
0.4
4 Mar-16 6.6 13.1 4.3 2.6 0.4 3.4
0.4
5 Sep-16 7.6 16.4 6.7 2.5 2.5 3.4
2.2
6 Mar-17 7.2 14.5 0.4 0.4 2.5 3.7
0.4
7 Sep-17 5 14.8 6.2 1.5 0.79 2.1
0.99
8 May-19 6 14.5 1.2 0.47 0.88 2.9
1.1
9 May-21 5.4 12 5.2 0.4 0.4 4.2
0.4
10 May-23 5.1 11 6.7 3.3 0.4 3.8
2.4
11
12
13
14
15
16
17
18
19
20
Coefficient of Variation:0.16 0.13 0.52 0.62 0.65 0.20 0.76
Mann-Kendall Statistic (S):-15 -6 8 -5 -17 16 6
Confidence Factor:89.2% 66.8% 72.9% 63.6% 92.2% 90.7% 66.8%
Concentration Trend:Stable Stable No Trend Stable Prob. Decreasing Prob. Increasing No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water , 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
SELENIUM CONCENTRATION (ug/L)
GSI Environmental Inc., www.gsi-net.com
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
May-2023 Intermediate ACL Monitoring Wells
Midvale Slag Selenium
T. Howes
0.1
1
10
100
08/13 12/14 05/16 09/17 02/19 06/20 10/21 03/23 07/24
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Sampling Date
MW-701i
MW-702i
MW-703i
MW-704i
MW-705i
MW-706i
MW-707i