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HomeMy WebLinkAboutDSHW-2018-004573 - 0901a06880822145Westinghouse Westinghouse Electric Company Nuclear Fuel Western Zirconium 10,000 West 900 South Ogden, Utah 84404-9760 USA Moragarrent 9nd Rad:ation Convol May 16, 2018 MAY 1 8 2018 Scott Anderson, Director Utah Division of Waste Management and Radiation Control 195 North 1950 West P.O. Box 144880 Salt Lake City, Utah 84114-4880 Ds HW 2o16 Do4-573 Re: Western Zirconium Plant Ground Water Monitoring Report Dear Mr. Anderson: Western Zirconium (WZ) is required to sample ground water associated with plant operations. Please find enclosed the report for the sampling completed in January 2018. Please contact me at 801-732-2356 if you have any questions. Thank You, Corey Christensen Div of Waste Management and Radiation Control MAY 1 8 2018 Westinghouse W- 201S - op 4573 WESTINGHOUSE ELECTRIC COMPANY Western Zirconium Plant Plant Area Semi-Annual Monitoring Report Winter 2018 May 2018 Prepared by WOODARD CURRAN 1015 South Montana Street, Suite C Butte, Montana 59701 Woodard & Curran Project 1801202 and 1801227 5:- /5-- 2/.7- David Colburn Date Western Zirconium Plant Manager Westinghouse Electric Company This report is based on data, site conditions and other information that is generally applicable as of December 2018, and the conclusions and recommendations herein are therefore applicable only to that time frame. Plant Area Semi-Annual Monitoring Report Winter 2018 Page l EXECUTIVE SUMMARY The objective of the Plant Area monitoring program is to evaluate the potential presence of contaminants in groundwater beneath the Plant Area. Groundwater monitoring in the Plant Area is performed semi-annually. This report is a summary of the Winter 2018 monitoring results. This report is also the fourth semi-annual report for the Plant Area. The data collected during this sampling event will provide the baseline for evaluation of groundwater concentration trends in future reports. All sampling and analysis were performed in accordance with the Plant Area Monitoring Plan (URS, 2015). Sampling for this monitoring event was performed at 25 monitoring wells on January 9-11, 2018. Groundwater samples were analyzed for general chemistry parameters, metals, radiological parameters, volatile organic compounds (VOCs), and semi-volatile organic compounds (SVOCs). Prior to sampling, groundwater levels were measured at 38 locations on 1/8/18. Groundwater elevations at the Plant Area ranged from 4209.63 to 4229.42 feet (ft) above mean sea level (amsl). The potentiometric surface contour map, constructed using groundwater elevation data, indicated that groundwater flows eastward toward the pond area. Analytical results were compared to site-specific human health risk-based screening level (RBSL) for each analyte. The RBSLs are for worker exposure with hazard index (HI) of 1 and cancer risk of 10-4. All groundwater analytical results were below the RBSL except fluoride in well Pi-3R. A survey of all Plant Area monitoring wells was conducted on December 16, 2016. Prior to this survey, many monitoring locations did not have reliable survey data to determine groundwater elevations. The December 2016 survey data were used to update the locations of monitoring wells in figures and to construct the potentiometric surface contour map. The initial monitoring plan included groundwater sampling at wells Pi-3 and A-7. However, well Pi-3 has been damaged and cannot be sampled and well A-7 was abandoned on 10/24/16 prior to excavating of solid waste management unit (SWMU) 26. Pi-3R was installed on 08/31/17 to replace Pi-3. Plant Area Semi-Annual Monitoring Report Winter 2018 Page II TABLE OF CONTENTS 1 INTRODUCTION 1 2 DATA COLLECTION 2 2.1 Groundwater Measurements 2 2.2 Field Sampling Methodology 2 2.3 Quality Control Samples 3 2.4 Change Notices 4 3 GROUNDWATER ELEVATIONS 5 4 GROUNDWATER QUALITY 6 4.1 Groundwater General Chemistry Parameters 6 4.2 Groundwater Metal Analytes 8 4.3 Groundwater Radiological Analytes 8 4.4 Groundwater Volatile Organic Compound Analytes 9 4.5 Groundwater Semi-Volatile Organic Compound Analytes 9 5 DATA QUALITY 1 1 5.1 Data Validation Qualifiers 1 1 5.2 Data Quality Indicators 1 3 6 FINDINGS AND CONCLUSIONS 1 8 7 REFERENCES 1 9 LIST OF APPENDICES Appendix A — Field Sampling Logs Appendix B — Data Validation Report Appendix C — Analytical Laboratory Data Reports Plant Area Semi-Annual Monitoring Report Winter 2018 Page III LIST OF TABLES Table 1 — Monitoring Program Summary Table 2 — Analytical Requirements Table 3 — Monitoring Well Water Level Measurements Table 4 — General Chemistry Analysis for Groundwater Table 5 — Metals Analysis for Groundwater Table 6 — Radiological Analysis for Groundwater Table 7 — VOC Analysis for Groundwater Table 8 — SVOC Analysis for Groundwater LIST OF FIGURES Figure 1 — Regional Overview Map Figure 2 — Monitoring Locations Figure 3 — Potentiometric Surface Map Plant Area Semi-Annual Monitoring Report Winter 2018 Page IV LIST OF ACRONYMS AND ABBREVIATIONS °C degree Celsius %R percent recovery < less than or equal to amsl above mean sea level DWMRC Utah Division of Waste Management and Radiation Control ft feet ft/ft feet per foot HI hazard index LCS laboratory control sample LCSD laboratory control sample duplicate MDC minimum detectable concentration MDL method detection limit mg/L milligrams per liter mL/min milliliters per minute MS matrix spike MSD matrix spike duplicate NTU nephelometric turbidity units ORP oxidation-reduction potential pCi/L picoCurie per liter QA/QC quality assurance/quality control QAPP Quality Assurance Project Plan RBSL risk-based human health screening level RL reporting limit SVOC semi-volatile organic compound SWMU solid waste management unit USEPA United States Environmental Protection Agency VOC volatile organic compound WZ Western Zirconium Plant Area Semi-Annual Monitoring Report Winter 2018 Page 1 1 INTRODUCTION Western Zirconium (WZ), an operating unit of the Nuclear Fuels Business Unit of Westinghouse Electric Company, is located at the eastern base of Little Mountain, approximately 12 miles west of Ogden, Utah shown on site location Figure 1. The site address is 10,000 West 900 South, Ogden, Utah. The plant encompasses 1,100 acres of land and has approximately 50 buildings. Western Zirconium extracts zirconium and hafnium metals from raw material and fabricates these metals into products used primarily by the nuclear fuel industry. The Plant Area complex is comprised of about 60 acres near the center of the property and is surrounded by a security fence. Adjacent to the Plant Area, to the east, is the Evaporation Pond Area, a fenced area containing approximately 110 acres of evaporation ponds. The objective of the Plant Area monitoring program is to evaluate the potential presence of contaminants in groundwater beneath the Plant Area, and to establish a baseline for comparison during future sampling events Monitoring requirements are detailed in the Plant Area Monitoring Plan (URS, 2015). Select wells within the Plant Area are monitored for water levels and sampled semi-annually for analytes detected during RFI investigations that may pose risk to human receptors. Table 1 provides a summary of the monitoring plan and Table 2 describes the analytical requirements. Figure 2 shows the monitoring well locations. The Plant Area monitoring program began in summer 2016 (July 2016). Monitoring requirements will be reassessed after two and five years of monitoring as prescribed in the Plant Area Monitoring Plan (URS, 2015). If sampling results indicate that movement of an existing plume is occurring, or a potential new release has occurred, it will be documented in the semi-annual report and an appropriate corrective action will be negotiated with the Utah Division of Waste Management and Radiation Control (DWMRC). This report summarizes the results from the Winter 2018 monitoring event and is the fourth semi- annual report for the Plant Area. Groundwater sampling for this event was conducted at 25 monitoring wells from January 9-11, 2018. The methods and procedures used during this sampling event were performed in accordance with the Plant Area Monitoring Plan (URS, 2015). Plant Area Semi-Annual Monitoring Report Winter 2018 Page 2 2 DATA COLLECTION During the Winter 2018 monitoring event, groundwater elevations were measured at 38 monitoring wells and groundwater samples were collected from 25 monitoring wells. Figure 2 shows the monitoring well locations that were sampled. Field parameters were measured during the sampling of groundwater, and measurements were recorded on field sampling logs (see Appendix A). 2.1 Groundwater Measurements Groundwater elevations were measured at 38 monitoring wells on 1/8/2017, prior to sampling. To prevent potential cross-contamination between measuring points, the water level indicator was decontaminated with a solution of Liquinox® detergent, and deionized water. The field geologist donned a new pair of clean nitrile gloves prior to measuring the groundwater elevation at each location. Groundwater elevations were measured to the nearest hundredth of a foot using an electronic water level indicator. Measured elevations were referenced to a surveyed measuring point at the top of each inner casing and recorded on a field form (see Appendix A). The monitoring well locations and top of casting elevations were surveyed on 12/16/2016. 2.2 Field Sampling Methodology Each monitoring well was purged and sampled with a dedicated bladder pump. Water quality parameters were measured in the field with a Hach 2100Q Portable Turbidimeter for turbidity and a YSI Professional Plus Multiparameter Instrument which included conductivity, temperature, redox potential as mv, and pH. Monitoring wells were purged and sampled using "low-stress" techniques [United States Environmental Protection Agency (USEPA), 1993] when possible at a rate of less than or equal to 0.3 liters per minute. Field parameters were recorded every one to five minutes until they stabilized (see Appendix A). Before purging was considered complete for a monitoring well, at least two consecutive field measurements made one to five minutes apart were required to be within the ranges stated below: • pH within plus or minus (±) 0.2 units change between individual readings • Temperature within ± 1 degree Celsius (°C) change between individual readings • Conductivity within ± 10 percent (%) change between individual readings • Turbidity within ± 10% or less than 5 nephelometric turbidity units (NTU) • ORP within ±10% Plant Area Semi-Annual Monitoring Report Winter 2018 Page 3 Groundwater samples were collected immediately after field-measured parameters stabilized. Sample aliquots that required field filtration were filtered with an in-line 0.45-micron filter attached directly to the pump discharge line. After collection, all sample containers were immediately placed on ice in an insulated cooler for preservation in order to meet the less than or equal to (<) 6°C preservation criterion. All sample containers were properly labeled with waterproof ink at the time of collection. The samples were either in the possession of the field sampler or securely stored at all times. A chain-of-custody record was initiated in the field and accompanied the samples during storage, transportation, and delivery to the analytical laboratory (see Appendix A). The samples were shipped to the analytical laboratory in custody-sealed coolers. All samples were delivered to Test America for analysis. 2.3 Quality Control Samples To ensure overall data quality, the following quality assurance/quality control (QA/QC) samples were collected: • Temperature Blank — one in each sample cooler where the preservation criterion of 6°C was required • Trip Blank - one for each cooler containing samples for volatile organic compounds (VOC) analyses • Blind Duplicate — 1 0% of the total number of environmental samples for each matrix and analysis • Matrix Spike/Matrix Spike Duplicate (MS/MSD) — 5% of the total number of samples for each matrix and analysis Plant Area Semi-Annual Monitoring Report Winter 2018 Page 4 2.4 Change Notices This section of the report provides a discussion of changed conditions, deviations from the planned work, or other events that occurred during the Winter 2018 monitoring event. Monitoring well Pi-3 was filled with bentonite mud which sealed off the well screen. Replacement well Pi-3R, installed on 08/31/2017, was monitored in place of Pi-3. This monitoring period (Winter 2018) was the first sampling of this replacement well. Monitoring well A-7 was abandoned on 10/24/2016 prior to the excavation of solid waste management unit (SWMU 26). Monitoring is discontinued at this location. American West Analytical Laboratory (AWAL) performed analyses for hafnium and zirconium; AWAL is not currently accredited for either of these analyses. Hafnium and zirconium analyses was performed using inductively coupled plasma mass spectrometry (ICP-MS) semi-quantitative analyses. No reusable equipment was used; therefore, no equipment rinse blanks were performed. The Western Zirconium Plant Area Monitoring Plan (Monitoring Plan) (URS, 2015) specifies a field quality control frequency of ten percent, while WZ Quality Assurance Plan (QAPP) (Westinghouse, 2002) specifies a field quality control frequency of 20 percent. During the Winter Monitoring, two blind duplicate samples and two field blank samples for VOC analyses were collected for all required analyses; this equates to 8.0% field quality control frequency and provides for sufficient field quality assessment. The Monitoring Plan specifies Teflon-lined caps for all analyses. Only VOC and SVOC glass and amber glass vials had Teflon-lined caps. Plastic sample bottles used during Winter 2018 monitoring had either plastic or foam-lined caps. Wells were purged with a Geotech Geocontroller Pro at approximately 150 to 300 milliliters per minute (mL/min). The Geotech controller did not allow for significant manipulation of the pumping rate; therefore; drawdown (greater than approximately 0.3 feet) was observed at A-4, A- 13, A-20, L-7, M-4, and M-8. Although poor recharge was observed, required well parameters had stabilized prior to sampling, and minimum sample volumes were collected. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 5 3 GROUNDWATER ELEVATIONS Static water levels were measured at 38 groundwater monitoring wells during the Winter 2018 monitoring event. The groundwater levels were calculated into elevations which are presented in Table 3. The Winter 2018 potentiometric surface contour map was generated from these water levels measured in January 2018 are shown on Figure 3. The groundwater elevations at the Plant Area ranged from 4209.63 to 4229.42 feet above mean sea level (ft amsl), with groundwater gradient generally moving eastward toward the pond area. The direction of groundwater flow generally coincides with the ground surface topography of the area. The potentiometric surface map displayed in Figure 3 was prepared using ESRI ArcGIS 10.5.1 with contour data generated with AutoCAD - Civil 3D 2018. The spatial coordinates of the groundwater monitoring wells used were first imported into Civil 3D along with the corresponding groundwater elevation measurement. The program was then used to create a triangular irregular networks (TIN) surface representing the potentiometric surface at the time of the groundwater elevation measurements. Adjustments were made by hand to reflect professional judgement in areas between data points. Due to the irregularity in the data collected from well PZ-2, the groundwater elevations for this location was omitted from the January 2018 potentiometric surface contour map. The potentiometric surface contour map was used to estimate the horizontal gradient beneath the Plant Area at three locations: 1) south side of the plant and parking area in a southeasterly direction, 2) east side of the plant in an easterly direction, and 3) north side of the plant in a northeasterly direction. The horizontal groundwater gradient toward the southeast (measured between PZ-4 and L-8) is approximately 1.26 ft per 100 ft or 0.0126 feet per foot (ft/ft). The horizontal groundwater gradient east of the Plant Area (measured between M-1 and A-10) toward the east is approximately 3.51 ft per 100 ft or 0.0351 ft/ft. The horizontal groundwater gradient north of the Plant Area toward the northeast (measured between PZ-1 and L-10) is approximately 3.76 ft per 100 ft or 0.0376 ft/ft. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 6 4 GROUNDWATER QUALITY During the Winter 2018 monitoring event, groundwater samples were collected from 25 monitoring wells and analyzed for all required parameters in accordance with the Monitoring Plan. The monitoring requirements in that plan are listed in Tables 1 and 2. The analytical results for groundwater are summarized in Tables 4 through 8. Non-detected results were reported as less than the reporting limit (RL) or minimum detectable concentration (MDC), and trace levels found between the MDL and the RL were qualified as estimated, using a "J" qualifier. To assess water quality in groundwater beneath the Plant Area, analytical data were compared to an established site-specific human health risk-based screening level (RBSL) for each analyte. The RBSLs are for worker exposure with hazard index (HI) of 1 and cancer risk of 10-4, taken from Table B-1 of the Monitoring Plan. All analytical data were validated and a summary of the data validation findings and definitions of relevant data qualification flags are provided in Section 5 of this report, with the complete data validation report presented in Appendix B, along with analytical laboratory data reports provided in Appendix C (electronic format only). Analytical results for monitoring wells were compared to the project RBSLs. Results that exceeded the RBSL are noted in Tables 4 through 8 with an asterisk (*). Results from the sample analyses are discussed in this section. 4.1 Groundwater General Chemistry Parameters During the Winter 2018 monitoring event, groundwater samples were analyzed for nine general chemistry parameters. All of the monitoring well analytical results were below their respective RBSLs, except for fluoride in well Pi-3R. Table 4 provides a summary of the analytical results for the general chemistry parameters in the groundwater samples. 4.1.1 Ammonia The ammonia concentration in groundwater samples ranged from 0.0732 to 237 mg/L, with the highest concentration found in the sample from well A-1. All ammonia results for the monitoring wells were below the RBSL of 307 mg/L. 4.1.2 Chloride The chloride concentration in groundwater samples ranged from 233 to 2,760 mg/L, with the highest concentration found in the sample from well A-17. There is no established site-specific RBSL for chloride. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 7 4.1.3 Fluoride The fluoride concentration in groundwater samples ranged from 0.285 to 2,850 mg/L, with the highest concentration found in the sample from well Pi-3R. The second highest concentration was 16 mg/L found in well Pi-10. All monitoring well fluoride results except Pi-3R were below the RBSL of 739 mg/L. 4.1.4 Nitrate The nitrate concentration in groundwater samples ranged from 0.027 to 2,780 mg/L, with the highest concentration found in the sample from well Pi-3R. The second highest concentration was 175 mg/L found in well A-16. All nitrate results for the monitoring wells were below the RBSL of 19,701 mg/L. 4.1.5 Nitrate Nitrite The nitrate+nitrite concentration in groundwater samples ranged from 0.00948 to 2,700 mg/L, with the highest concentration found in the sample from well Pi-3R. The second highest concentration was 178 mg/L found in well A-16. There is no established site-specific RBSL for nitrate+nitrite, but the RBSL for nitrate was used for comparison. All nitrate+nitrite results for the monitoring wells were below the nitrate RBSL of 19,701 mg/L. 4.1.6 Sulfate The sulfate concentration in groundwater samples ranged from 8.64 to 1,890 mg/L, with the highest concentration found in the sample from well M-9. There is no established site-specific RBSL for sulfate. 4.1.7 Cyanide The cyanide concentration in groundwater samples ranged from non-detect to 0.0139 mg/L, with the highest concentration found in the sample from well L-3. All cyanide results for the monitoring wells were below the RBSL of 246 mg/L. 4.1.8 Thiocyanate The thiocyanate concentration in groundwater samples ranged from non-detect to 1.60 mg/L, with the highest concentration detected at well A-1. All monitoring well thiocyanate results were below the RBSL of 1.7 mg/L. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 8 4.1.9 pH The pH in groundwater samples ranged from 1.13 to 9.67 standard units, with the lowest pH at well Pi-3R and the highest pH at well A-4. There is no established site-specific RBSL for the pH. 4.2 Groundwater Metal Analytes Groundwater samples were analyzed for 14 different metals, including: aluminum arsenic, barium, cadmium, chromium, hafnium iron, lead, magnesium, nickel, selenium, silver, vanadium, and zirconium. In these samples, all 14 metals were detected. Groundwater metal results did not exceed the RBSLs. Table 5 provides a summary of the analytical results for the metals in the groundwater samples. 4.3 Groundwater Radiological Analytes Groundwater samples were analyzed for seven radiological parameters. All of the analytical results were below the established RBSLs. Table 6 provides a summary of the radiological results for the groundwater samples. The analytical results for the radiological analysis are discussed in the following subsections. For a conservative determination, the sum of the result and uncertainty is used for comparison to the applicable RBSL for each radiological parameter. 4.3.1 Gross Alpha The gross alpha concentration in groundwater samples ranged from non-detect to 278 picoCurie per liter (pCi/L), with the highest concentration detected at well Pi-3R. The second highest concentration was 30 pCi/L found in well L-3. There is no established site-specific RBSL for gross alpha. 4.3.2 Gross Beta The gross beta concentration in groundwater samples ranged from 11.8 to 380 pCi/L, with the highest concentration detected at well Pi-3R. The second highest concentration was 104 pCi/L found in well A-17. There is no established site-specific RBSL for gross beta. 4.3.3 Radium 226 The radium 226 concentration in groundwater samples ranged from non-detect to 18.4 pCi/L, with the highest concentration detected at well Pi-3R. The second highest concentration was 1.04 pCi/L found in well L-3. All radium 226 results for the monitoring wells were significantly below the RBSL of 41,341 pCi/L. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 9 4.3.4 Radium 228 The radium 228 concentration in groundwater samples ranged from non-detect to 86 pCi/L, with the highest concentration detected at well Pi-3R. The second highest concentration was 3.7 pCi/L found in well A-17. All radium 228 results for the monitoring wells were significantly below the RBSL of 42,859 pCi/L. 4.3.5 Thorium 230 The thorium 230 concentration in groundwater samples ranged from non-detect to 6.9 pCi/L, with the highest concentration detected at well Pi-3R. The second highest concentration was 0.28 pCi/L found in well A-18. All thorium 230 results for the monitoring wells were significantly below the RBSL of 877,680 pCi/L. 4.3.6 Thorium 232 The thorium 232 concentration in groundwater samples ranged from non-detect to 16.8 pCi/L, with the highest concentration detected at well Pi-3R. The second highest concentration was 0.096 pCi/L found in well M-7. All thorium 232 results for the monitoring wells were significantly below the RBSL of 791,590 pCi/L. 4.3.7 Uranium The uranium concentration in groundwater samples ranged from 0.000146 to 0.0479 [tg/L, with the highest concentration detected at well Pi-3R. All uranium results for the monitoring wells were significantly below the RBSL of 6,567,262µg/L. 4.4 Groundwater Volatile Organic Compound Analytes During the Winter 2018 monitoring event, groundwater samples were analyzed for VOCs. A summary of the analytical groundwater results for detected VOCs is provided in Table 7. Detected results are highlighted in grey, and any result that exceed the RBSL is identified with an asterisk (*). In the groundwater samples collected during the Winter 2018 monitoring event, 40 VOCs were detected. The compounds that were detected in five or more monitoring wells include 4- methy1-2-pentanone, acetone, and chloroform. All VOC results were below their respective RBSLs. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 10 4.5 Groundwater Semi-Volatile Organic Compound Analytes Groundwater samples were analyzed for semi-volatile organic compounds (SVOCs). A summary of the analytical groundwater results for detected SVOCs are provided in Table 8. Detected results are highlighted grey, and any result that exceed the RBSL is identified with an asterisk (*). In the groundwater samples collected during the Winter 2018 monitoring event, three SVOCs were detected. No SVOC were detected in five or more monitoring wells. All SVOC results were below the RBSLs. Pentachlorophenol was additionally analyzed utilizing Selected Ion Monitoring (SIM), which provided lower detection limits. Pentachlorophenol results presented in Table 8 are the results employing SIM. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 11 5 DATA QUALITY All analytical data presented in this report were validated. Data validation qualifiers have been added to the results as necessary. The data validation process is described in detail in the Western Zirconium Quality Assurance Project Plan (QAPP; Westinghouse, 2002) and in Appendix B of this semi-annual report. 5.1 Data Validation Qualifiers Data validation were performed using the requirements and protocols outlined in the following documents and analytical methods: • U.S. Environmental Protection Agency (U.S. EPA). 2017. US. EPA Contract Laboratog Program National Functional Guidelines for Superfund Organic Methods Data Review. OLEM 9355.0-136; EPA-540-R-2017-002. January. • U.S. Environmental Protection Agency (U.S. EPA). 2017. U.S. EPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review. OLEM 9355-0-135; EPA 540-R-2017-001. January. • Multi Agency Radiological Laboratory Analytical Protocols, MARLAP, Manual, EPA 402- B-04-001A, July 2004. • Evaluation of Radiochemical Data Usability, ES/ER-MS-5, April 1997. Qualifications were assigned in accordance with the U.S. EPA Contract Laboratory Program National Functional Guidelines and resulted from preparation and the sample analysis method, poor initial and continuing calibration criteria, positive blank detections, sample analysis outside of holding times, poor laboratory control sample (LCS), laboratory control sample duplicate (LCSD), matrix spike (MS), matrix spike duplicate (MSD), and SDS performance, and results reported below the quantitation limits. The following table summarizes the findings and data qualifications assigned First Half of 2018 (January 2018) Westinghouse Western Zirconium Data results. The following tables provide specific definitions for qualifiers assigned. Inorganic Data Validation Qualifiers F q t. , efinition. ' - . ik.-.! i i, • ' The analyte was analyzed for but was not detected above the reported sample quantitation limit. The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample. WOODARD CURRAN Plant Area Semi-Annual Monitoring Report Winter 2018 Page 12 , Definiti II) '..i, , , J+ The result is an estimated quantity, but the result may be biased high. J- The result is an estimated quantity, but the result may be biased low. UJ The analyte was analyzed for but was not detected. The reported quantitation limit is approximate and may be inaccurate or imprecise. R The data are unusable. The sample results are rejected due to serious deficiencies in meeting quality control criteria. the analyte may or may not be present in the sample. Organic Data Validation Qualifiers Fiag .- -5. Definition 1,•?, IL. U The analyte was analyzed for but was not detected above the reported sample quantitation limit. J The result is an estimated quantity. The associated numerical value is the approximate concentration of the analyte in the sample. UJ The analyte was analyzed for but was not detected. The reported quantitation limit is approximate and may be inaccurate or imprecise. R The data are unusable. The sample results are rejected due to serious deficiencies in meeting quality control criteria. the analyte may or may not be present in the sample. NJ Presumptively present at an estimated quantity (use with TICs only). Radiochemical Data Validation Qualifiers ..A.m. ;n1 / c I ( V. The analysis was performed, and radioactivity was detected (e.g., the radioanalytical result is statistically positive at the 95% confidence interval and is above its MDC). NOTE: The radionuclide is considered to be present in the sample. U The analysis was performed, but no radioactivity was detected (i.e., the radioanalytical result was not statistically positive at the 95% confidence interval and/or the result was below its MDC). The "U" qualifier flag is also applicable to any result reported as zero (0) (± an associated uncertainty). NOTE: The radionuclide is not considered to be present in the sample. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 13 t 'tS UJ The analysis was performed; however, the result is highly questionable due to analytical and/or laboratory quality control anomalies. The use of such a result is strongly discouraged. Analytical and quality control anomalies include such items as: significant blank contamination, known photopeak interferences and/or photopeak resolution problems, known matrix interferences, unacceptable laboratory control sample recoveries, serious instrument calibration problems, improper sample preservation, etc. The "Ur qualifier flag could designate a possible false positive result in the case of a result that is statistically positive at the 95% confidence level. The "UJ" qualifier flag could indicate the result is considered an estimated nondetect (a nondetect that may be due to loss of analyte from lack of sample preservation, holding time exceedances, etc.). The specific use of the "Ur flag is included by the validator in the text of the validation report. NOTE: The radionuclide may or may not be present in the sample and the result is considered highly questionable. The analysis was performed, and radioactivity was detected (i.e., the radionuclide result is statistically positive at the 95% confidence interval and is above its MDC). However, the result is questionable due to analytical and/or laboratory quality control anomalies/irregularities and should therefore be used only as an estimated (approximated) quantity. Analytical and/or quality control anomalies include such items such as: laboratory duplicate imprecision, unsatisfactory analytical yields, insufficient laboratory control sample recoveries, unacceptable PE sample results, instrument calibration problems, improper sample preservation, etc. NOTE: The radionuclide is considered to be present in the sample; however, the result may not be an accurate representation of the amount of activity actually present in the sample. The analysis result is unusable and was rejected due to severe analytical and/or quality control problems. NOTE: The radionuclide may or may not be present, and the result is known to be inaccurate or imprecise. 5.2 Data Quality Indicators The Winter 2018 monitoring data are considered usable as qualified, except for the following results: One data point analyzed for 2,4-Dimethylphenol (Pi-3R) and 31 data points analyzed for 1,4-Dioxane (including all natural, duplicate, field blank, and trip blank samples) were qualified with `R' and the accuracy and precision of the data is so questionable it is recommended it not be 1411, WOODARD CURRAN Plant Area Semi-Annual Monitoring Report Winter 2018 Page 14 used due to poor MS/MSD recovery and low ICAL and CCAL (initial and continuing calibration) RRF (relative response factor), respectively. Data quality is summarized in the following sections below by analyses method and in further detail in Appendix B. Anions (Chloride, Fluoride, and Sulfate) by USPEA Method 300.0: The anions data set consists of 27 water samples analyzed for chloride, fluoride, and sulfate which resulted in 81 data points. All 81 data points are considered usable for evaluating site conditions and indicated that the 81 data points for fluoride, chloride, and sulfate (100% of the total) were either non-detect and identified as 'TY or were evaluated and remain unqualified. These results can be considered qualitative data. It should be noted that Chloride data provided in the Plant Area Semi-Annual Monitoring Report: Summer 2017 had been incorrect. The cause was a corrupt EDD file sent from the analytical lab. The issue has been corrected, and the revised data is provided in Table 4. Ammonia by USEPA Method 350.1: The ammonia data set consists of 27 water samples which resulted in 27 data points. All 27 data points are considered usable for evaluating site conditions and indicated that: • 2 data points (7.4% of the total) were evaluated and remain unqualified. These results can be considered as qualitative data. • 25 data points (92.6% of the total) were qualified with a 'I' or `.T+' validation flag and can be considered as quantitative data. Cyanide by USEPA Method 335.4: The cyanide data set consists of 27 water samples which resulted in 27 data points. All 27 data points are considered usable for evaluating site conditions and indicated that the 27 data points for cyanide (100% of the total) were either non-detect and identified as 'LP or were evaluated and remain unqualified. These results can be considered qualitative data. pH by Standard Method 4500-H+B: The pH data set consists of 27 water samples which resulted in 27 data points. All 27 data points are considered usable for evaluating site conditions and indicated that: • 4 data points (14.8% of the total) were evaluated and remain unqualified. These results can be considered as qualitative data. • 23 data points (85.2% of the total) were qualified with a T validation flag and can be considered as quantitative data. Nitrate and Nitrite by USEPA 353.2: Plant Area Semi-Annual Monitoring Report Winter 2018 Page 15 The nitrate and nitrite data set consists of 27 water samples which resulted in 54 data points. All 54 data points are considered usable for evaluating site conditions and indicated that: • 37 data points (68.5% of the total) were either non-detect and identified as 'LP or were evaluated and remain unqualified. These results can be considered as qualitative data. • 17 data points (31.5% of the total) were qualified with a T validation flag and can be considered as quantitative data. Thiocyanate by Standard Method 4500-CN M: The thiocyanate data set consists of 27 water samples which resulted in 54 data points. All 54 data points are considered usable for evaluating site conditions and indicated that: • 25 data points (82.6% of the total) were either non-detect and identified as 'LP or were evaluated and remain unqualified. These results can be considered as qualitative data. • 2 data points (7.4% of the total) were qualified with a T validation flag and can be considered as quantitative data. Total and Dissolved Metals by USEPA SW-846 Methods 6010C, 6020A, & 7470A: The metals data set consists of 27 water samples analyzed for total metals and Dissolved U and resulted in 405 data points. All 405 data points are considered usable for evaluating site conditions and indicated that: • 303 total and dissolved metals data points (77.5% of the total) were either qualified with a 'IF validation flag due blank detections, were non-detect, or were detected in the samples and can be considered as qualitative data. • 91 total and dissolved metals data points (22.5% of the total) was qualified with a T, `UP, or `.1'+' validation flag and can be considered as quantitative data. Pentachlorophenol by SW-846 Method 8270D: The pentachlorophenol data set consists of 27 water samples. All 27 cyanide data points are considered usable for evaluating site conditions and indicated that all 27 data points (100% of the total) were qualified with a `UP validation flag and can be considered as quantitative data. All 8270D-SIM results have been qualified with a `Ur validation flag to denote the reported concentrations are non-detect, and the sample quantitation limit (or reporting limit) is an estimate as the laboratory reported the results as <RL as the sample aliquots for the 8270D analysis were analyzed for the 8270D-SIM analysis and contained high surrogate concentrations resulting in unreliable surrogate recoveries, and possible interference, carryover, and suppression issues. Even though these results were not rejected, the accuracy of the data is highly questionable and should potentially be used for qualitative purposes and with caution. Semivolatile Organic Compounds (SVOCs) by SW-846 Method 8270D: Plant Area Semi-Annual Monitoring Report Winter 2018 Page 16 The SVOC data set consists of 27 water samples which resulted in 1809 data points. Of the 1809 data points, 1808 data points are considered usable for evaluating site conditions and indicated that: • 1636 data points (90.4% of the total) were non-detect or were detections above the quantitation limit and can be considered qualitative data. • 172 data points (9.5% of the total) were qualified 'Ur or `J' and can be considered quantitative data. • 1 data point (0.1% of the total) was qualified with 'R' and the accuracy and precision of the data is so questionable it is recommended it not be used due to poor MS/MSD recovery for 2,4-Dimethylphenol. Volatile Organic Compounds by USEPA SW-846 Method 8260B: The VOC data set consists of 31 water samples which resulted in 1612 data points. Of the 1612 data points, 1581 data points are considered usable for evaluating site conditions and indicated that: • 1551 data points (96.2% of the total) were non-detect or were detections above the quantitation limit and can be considered qualitative data. • 30 data points (1.9% of the total) were qualified 'Ur or T and can be considered quantitative data. • 31 data points (1.9% of the total) were qualified with `R' and the accuracy and precision of the data is so questionable it is recommended it not be used due to low ICAL and CCAL RRF for 1,4-Dioxane. Radiochemical Analyses: The radiochemical data set consists of 27 water samples for Gross Alpha, Gross Beta, Ra-226, Ra- 228, and Isotopic Thorium (Th-228, Th-230, and Th-232); 19 soil samples for Ra-226 which resulted in 189 data points: • 187 data points (98.9% of the total) were statistical non-detects or were considered as truly present in the samples and can be considered qualitative data. • 2 data points (1.1% of the total) were qualified with a 'Ur or T validation flag and can be considered as quantitative data. Trip Blanks and Field Blanks: Two (2) trip blank and two (2) field blank samples were collected for the January 2018 Westinghouse Wester Zirconium sampling effort and are listed in the following table. TriplField Blan4 for'the Nyek4righouse Western .Zircnnt'n 'Januari'Sili,gaintiOng , 'SDG ra.*Ple!D AnalYsis ' QC Type 1801202 TB-010918 VOC Trip Blank GW-FB1-010918 VOC Field Blank Plant Area Semi-Annual Monitoring Report Winter 2018 Page 17 1801227 TB-011018 VOC Trip Blank GW-FB2-011118 VOC Field Blank The trip blank and field blank results were determined to be non-detect. No further qualifications were warranted. Field Duplicates: Two groundwater field duplicate samples were collected during this sampling event. The field duplicate pairs were GW-M3 -010918 / GW-D1-010918 and GW-L3 -011118 / GW-D2-011118; the concentration-dependent field duplicate precision criteria were satisfied for all parameters. Natural and duplicate sample results are presented in Tables Al through A5. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 18 6 FINDINGS AND CONCLUSIONS The data for the Winter 2018 monitoring event were collected January 9-11, 2018. The groundwater elevations at the Plant Area ranged from 4209.63 to 4229.42 ft amsl. Based on the potentiometric surface contour map in Figure 3, groundwater flows eastward toward the pond area. The groundwater samples from 25 monitoring wells were analyzed from general chemistry parameters, metals, radiological parameters, VOCs, and SVOCs. The analytical results were evaluated against the RBSLs. All analytical results with exception of one sample for Fluoride at well Pi-3R, were below the RBSLs. Plant Area Semi-Annual Monitoring Report Winter 2018 Page 19 7 REFERENCES URS, 2015. Plant Area Monitoring Plan. December 2015. USEPA, 1993. Ground Water Sampling — A Workshop Summary; Dallas, Texas; November 30 — December 2, 1993. (EPA/600/R-94/205). Westinghouse, 2002. Western Zirconium Quality Assurance Project Plan. November 2002. Plant Area Semi-Annual Monitoring Report Winter 2018 TABLES Table 1: Monitoring Program Summary Western Zirconium Plant Area Monitoring Program „ Schedule' Event Schedule Comments Sampling Semi-Annual January, July Sampling will begin the first week ofJanuary and July every year Submite Report to UDEQ Semi-Annual October, April Report will be submitted to UDEQ, 90 days after the sampling event, normally the first week of April and October every year. Andlytical Require:ten' ts , All groundwater samples will be analyzed for analytes listed in Table 2. MoultorlhgLocatidns, Well ID GW Level GW Sample Well ID GW Level GW Sample Well ID GW Level GW Sample Well ID GW Level GW Sample A-1 X X BG-1 X X M-1 X X PZ-1 X A-3 X X L-1 X M-2 X X PZ-2 X A-4 X X L-2 X M-3 X X PZ-3 X A-7 ** ** L-3 X X M-4 X X PZ-4 X A-10 X X L-4 X M-7 X X PZ-5 X A-12 X X L-5 X M-8 X X PZ-6 X A-13 X X L-6 X M-9 X X PZ-7 X A-16 X X L-7 X X Pi-3 A-17 X X L-8 X Pi-3R X X A-18 X X L-9 X Pi-10 X X A-19 X X L-10 X X Pi-11 X X A-20 X X Source: Plant Area Monitoring Plan , January 2015, Table 1 (URS, 2015) *Well Pi-3 had been damaged, Pi-3R was drilled as a replacement and is monitored **Well A-7 was abandoned 10/24/2016, monitoring at this location is discontinued Table 2: Analytical Requirements Western Zirconium Plant Area Monitoring Program Analyses for Groundwater Analytes Analytical Method Sampling Container Preservative Filter General Chemistry,:, pH SW-846 9040C 1 L None, Refrigerate at .1.6°C None Nitrate SW-846 9056/EPA 353.2 Chloride SW-846 9056/EPA 325.2 Fluoride SW-846 9056/EPA 340.2 Sulfate SW-846 9056/EPA 375.4 Ammonia EPA 350.1 0.25 L pH < 2 sulfuric acid, Refrigerate at ...6°C None Nitrate+Nitrite SW-846 9056/EPA 353.2 Total Cyanide SW-846 9012 0.25 L pH < 2 sodium hydroxide, Refrigerate at 5.6°C None Thiocyanate SM 4500-CN-M 0.25 L pH < 2 sodium hydroxide, Refrigerate at 5.6°C None Radiological Radium 226 EPA 903.0-M 1 Gallon pH < 2 nitric acid, Refrigerate at 6°C 0.45 micron filter Radium 228 EPA 904.0-M Thorium 230 and 232 DOE A-010R Mod Gross Alpha SM 7110 Mod Gross Beta EPA 900.0 Mod Dissolved Uranium SW-846 6020 0.5 L pH < 2 nitric acid, Refrigerate at 6''C 0.45 micron filter Total Metals Total Metals' SW-846 6010/6020 0.5 L pH < 2 nitric acid None Hafnium SW-846 6020B/EPA 200.8 0.5 L pH < 2 nitric acid None Volatjle OfganicCompounds (VOC4 VOCs SW-846 8260 40 mL glass X 3 pH < 2 hydrochloric acid, Refrigerate at 5.6°C None, Zero- headspace Semi-Volatile Organic Compounds (SVOCs) SVOC SW-846 8270 40 mL amber glass X 3 None, Refrigerate at _.6°C None Pentachlorophenol SW-846 8270W-3511 Adapted From: Plant Area Monitoring Plan, January 2015, Table 2 (URS, 2015). 1-Total Metals are aluminum, arsenic, barium, cadmium, chromium, hafnium, iron, lead, magnesium, nickel, selenium, silver, vanazium, and zirconium. Table 3: Monitoring Well Water Level Measurements Western Zirconium Plant Area Monitoring Program WELL ID Location Easting1 (meters) Location Northingi (meters) Top of Casing Elevation1 (ft ams1) Measure Date Measure Time Depth to Water (ft btoc) Groundwater Elevation (ft amsI) A-1 397018.65 4568243.76 4236.08 01/08/2018 15:30 14.6 4221.48 A-3 397044.59 4568274.75 4235.17 01/08/2018 16:22 14.1 4221.07 A-4 397052.66 4568206 4231.79 01/08/2018 16:06 10.48 4221.31 A-7* NM NM NM NM NM NM A-10 397119.97 4568197.64 4229.34 01/08/2018 15:11 11.69 4217.65 A-12 397117.66 4568119.23 4228.78 01/08/2018 15:14 10.54 4218.24 A-13 397152.17 4568219.34 4223.31 01/08/2018 15:37 6.1 4217.21 A-16 397086.35 4568205.46 4232.97 01/08/2018 15:06 11.85 4221.12 A-17 397158 55 4568377.77 4222.53 01/08/2018 15:33 5.81 4216.72 A-18 397063.2 4568395.3 4229.48 01/10/2018 08:00 9.55 4219.93 A-19 397156.64 4568459.38 4222 52 01/08/2018 15:31 6.41 4216.11 A-20 397053.31 4568325.75 4236.68 01/08/2018 16:29 16.63 4220.05 BG-1 396909.55 4567969.89 4257.79 01/08/2018 15:56 37.39 4220.40 L-1 397276.76 4567442.19 4232.2 01/08/2018 16:09 13.63 4218.57 L-2 397139.99 4568558.82 4227.02 01/08/2018 15:15 11.76 4215.26 L-3 397104.26 4568597.91 4226.12 01/08/2018 15:18 9.5 4216.62 L-4 397450.76 4567394.48 4221.39 01/08/2018 16:14 11.08 4210.31 L-5 397463.02 4567365.9 4220.71 01/08/2018 16:12 11.08 4209.63 L-6 397025.6 4568597.55 4233.39 01/08/2018 15:22 15.37 4218.02 L-7 397116.86 4567850.29 4226.7 01/08/2018 16:02 7.7 4219.00 L-8 397061.29 4567892.47 4228.55 01/08/2018 16:00 9.55 4219.00 L-9 397152.73 4567804.13 4228.42 01/08/2018 16:21 9.67 4218.75 L-10 397000.09 4568770.83 4225.11 01/08/2018 15:05 15.02 4210.09 M-1 396991.55 4568178.75 4236.67 01/08/2018 14:49 14.46 4222.21 M-2 397019.08 4568182.93 4236.19 01/08/2018 14:52 14.5 4221.69 M-3 397032.39 4568175.01 4236.15 01/08/2018 14:55 15.11 4221.04 M-4 397036.66 4568141.71 4237.05 01/08/2018 16:09 16.23 4220.82 M-7 397054.39 4568178.75 4230.74 01/08/2018 15:00 9.76 4220.98 M-8 397057.43 4568119.34 4232.52 01/08/2018 16:13 10.7 4221.82 M-9 397063.7 4568056.57 4231.6 01/08/2018 15:47 12.5 4219.10 Pi-3* NM NM NM NM NM NM Pi-3R 396774.4 4568291.6 4240.06 01/08/2018 17:15 17.18 4222.88 Pi-7 396790.49 4568256.73 4242.98 01/08/2018 17:11 13.56 4229.42 Pi-10 396852.92 4568360.21 4242.78 01/08/2018 17:05 22.04 4220.74 Pi-11 396864.04 4568322.11 4240.21 01/08/2018 15:45 18.2 4222.01 PZ-1 396847.9 4568517.38 4241.81 01/08/2018 16:38 20.6 4221.21 PZ-2 396750.79 4568446.73 4242.97 01/08/2018 16:35 23.05 4219.92 PZ-3 396751.86 4568227.18 4242.83 01/08/2018 15:53 18.91 4223.92 PZ-4 396832.08 4568099.75 4242.14 01/08/2018 17:45 19.23 4222.91 PZ-5 396876.37 4568031.64 4238.2 01/08/2018 17:48 16.55 4221.65 PZ-6 397001.79 4568058.16 4233.55 01/08/2018 15:45 12.84 4220.71 PZ-7 396947.91 4568320.26 4236.64 01/08/2018 16:42 15.01 4221.63 1Northing and easting in UTM Zone 12, NAD1927, and top of casing in NAVD 29. Survey data collection 12/16/2016. Pi-3R survey from Boring Log 12/21/2017 *Pi-3 was damaged prior to 2015 and can not be used, well A-7 was abandoned 10/24/2016. ft - feet amsl - above mean sea level btoc - below top of casing NM - not measured Minimum Elevation 4209.63 Maximum Elevation 4229.42 Table 4: General Chemistry Analyses for Groundwater Western Zirconium Plant Area - Winter 2018 Analyte Ammonia Chlorides Chloride Fluoride Nitrate Nitrate-Nitritez Sulfate Cyanide Thiocyanate pH Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L pH (standard) unit RBSL1 307 NC NC 739 19,701 19,701 NC 246 1.7 NC Location ID Sample ID Sample Date Groundwater Concentration3A A-1 GW-A1-011018 1/10/2018 2371 816 864 4.42 < 0.0100 U 0.0363 J 79.6 0.00222 U 1.6 9.621 A-3 GW-A3-011018 1/10/2018 491 767 785 1.06 < 0.0500 U 5.26 J 120 < 0.00500 U 0.07 J 8.681 A-4 GW-A4-011018 1/10/2018 1901 1030 1,020 5.2 4.17 7.441 142 0.00433 U 1.09 9.67 J A-10 GW-A10-011018 1/10/2018 4.97 J 1510 1,360 1.53 0.337 0.323 J 1,130 < 0.00500 U 0.32 7.071 A-12 GW-Al2-011018 1/10/2018 112 J 718 794 1.48 < 0.0100 U 3.56 J 465 0.00214 U 0.22 7.691 A-13 GW-A13-011018 1/10/2018 132 J 1880 1700 1.137 3.4 3.521 55.7 < 0.00500 U 0.29 9.011 A-16 GW-A16-011018 1/10/2018 6.31 669 846 9.26 175 1781 218 0.00921 U 0.18 6.571 A-17 GW-A17-011018 1/10/2018 0.3681 2980 2760 2.5 < 0.0100 U 0.009481 153 < 0.00500 U 0.32 7.081 A-18 GW-A18-011018 1/10/2018 1.33 J 2340 1440 0.779 0.329 0.3381 84 0.00217 U 0.37 7.311 A-19 GW-A19-011018 1/10/2018 0.2541 971 898 1.149 0.027 0.03281 134 0.00203 U 0.17 7.631 A-20 GW-A20-011018 1/10/2018 0.1361 752 619 0.811 0.0545 0.01521 84.4 < 0.00500 U < 0.02 U 7.681 BG-1 GW-BG1-011118 1/11/2018 < 0.0500 U 2210 1980 0.285 8.56 9.131 319 0.00833 < 0.02 U 7.26 L-3 GW-L3-011118 1/11/2018 0.247 J 3850 2220 0.453 < 0.0100 U 0.0535 J 94.8 0.0139 U 0.041 7.4 L-7 GW-L7-011118 1/11/2018 3.021 1080 1180 0.396 < 0.0100 U 0.0118 J 159 < 0.00500 U < 0.02 U 7.95 L-10 GW-L10-011018 1/10/2018 1 J 3070 2100 1.07 0.0273 0.049 J 880 < 0.00500 U < 0.02 U 8.13 J M-1 GW-M1-010918 1/9/2018 1851+ 1480 1770 0.979 0.0552 0.182 596 .00367 U 0.37 7.091 M-2 GW-M2-010918 1/9/2018 111+ 1470 1040 0.952 13.7 142 97.4 0.00517 U 0.16 7.121 M-3 GW-M3-010918 1/9/2018 84.41+ 909 941 1.9 2.51 0.914 273 <0.00500 U 0.18 7.381 M-4 GW-M4-010918 1/9/2018 1501+ 324 644 1.79 0.055 0.0865 51.3 .00384 U 0.29 7.37 J M-7 GW-M7-010918 1/9/2018 6.28 J+ 871 895 1.71 12.1 12.9 92.6 <.00500 U 0.15 7.381 M-8 GW-M8-010918 1/9/2018 59.2 J+ 195 281 1.19 96.7 93.4 363 .00240 U 0.13 7.261 M-9 GW-M9-011118 1/11/2018 12.71 1760 1450 1.34 1.971 1.78 1,890 0.00607 < 0.02 U 7.4 Pi-3R GW-Pi3r-010918 1/9/2018 65.8 J+ NA 233 2850* 2780 2700 9 0.00906 < 0.02 U 1.131 Pi-10 GW-Pi10-010918 1/9/2018 0.732 J+ 978 627 16 54.9 55.3 75.3 .00227 U 0.12 6.83 J Pi-11 GW-Pi11-010918 1/9/2018 < 0.0500 U 1150 671 15.7 9.47 49.7 77 0.00784 U 0.11 6.94 J mg/L - milligrams per liter NC - no criteria RBSL - risk based screening level * - RBSL exceeded Data Qualifiers: J: The associated value is an estimated quantity. J+: The associated value is an estimated quantity that may be biased high. J-: The associated value is an estimated quantity that may be biased low. U: The analyte was analyzed for, but was not detected above the level of the associated value. The associated value is the sample quantitation limit. UJ: The analyte was analyzed for, but was not detected. The associated value is an estimate and may be inaccurate or imprecise R: The data is unusable. The analyte may or may not be present. Notes: 1. RBSL for worker exposure with hazard index (HI) = 1 and cancer risk (CR) = 10-4; from Plant Area Monitoring Plan , Table B-1 (URS, 2015). 2. There is no SS RBC for nitrate/nitrite in groundwater. The RBSL for nitrate is used for comparison purposes. 3. Non-detect results are reported as < method detection limit (MDL), unless otherwise qualified. 4. Wells Pi-3 and A-7 were not sampled. Pi-3 was damaged prior to 2015, and A-7 was abandoned on 10/24/2016. 5. Chloride concentrations from Summer 2017 sampling event. Analyte Unit RBSL1 Aluminum mg/L 12,313,253 Arsenic mg/L 3,694 Barium mg/L 392,000 Cadmium mg/L 373 Location ID Sample ID Sample Date Groundwater Concentration2'3 A-1 GW-A1-011018 1/10/2018 0.0361 J 0.116 0.0273 < 0.000500 U A-3 GW-A3-011018 1/10/2018 0.0291 J 0.0461 0.142 < 0.000500 U A-4 GW-A4-011018 1/10/2018 1 0.219 0.0526 0.0001211 A-10 GW-A10-011018 1/10/2018 0.0238 J 0.0702 0.0324 < 0.000500 U A-12 GW-Al2-011018 1/10/2018 < 0.100 U 0.11 0.188 < 0.000500 U A-13 GW-A13-011018 1/10/2018 0.0332 J 0.00323 0.127 < 0.000500 U A-16 GW-A16-011018 1/10/2018 0.669 0.00549 0.556 0.00318 A-17 GW-A17-011018 1/10/2018 < 0.100 U 0.00141 0.131 < 0.000500 A-18 GW-A18-011018 1/10/2018 0.221 0.00385 0.256 0.00932 A-19 GW-A19-011018 1/10/2018 0.0815 J 0.0147 0.121 < 0.000500 U A-20 GW-A20-011018 1/10/2018 0.0713 J 0.0305 0.173 < 0.000500 U BG-1 GW-BG1-011118 1/11/2018 0.0907 J 0.0008741 0.364 0.0002871 L-3 GW-L3-011118 1/11/2018 0.0842 J 0.0186 0.0725 < 0.000500 U L-7 GW-L7-011118 1/11/2018 0.14 < 0.00200 U 0.2 < 0.000500 U L-10 GW-L10-011018 1/11/2018 < 0.100 U 0.0066 0.0456 < 0.000500 U M-1 GW-M1-010918 1/9/2018 < 0.100 U 0.0407 0.151 < 0.00050 U M-2 GW-M2-010918 1/9/2018 < 0.100 U 0.00192 J 0.5 0.000567 M-3 GW-M3-010918 1/9/2018 < 0.100 U 0.076 0.147 0.0001041 M-4 GW-M4-010918 1/9/2018 < 0.100 U 0.0303 0.47 0.000439 1 M-7 GW-M7-010918 1/9/2018 < 0.100 U 0.00269 0.123 0.000233 1 M-8 GW-M8-010918 1/9/2018 < 0.100 U 0.00384 0.172 0.000459 .1 M-9 GW-M9-011118 1/11/2018 0.0741 .1 0.00836 0.022 < 0.000500 U Pi-3R GW-Pi3r-010918 1/9/2018 817 0.0791 1.77 27.6 Pi-10 GW-Pi10-010918 1/9/2018 0.217 0.0029 0.221 0.0016 Pi-11 GW-Pi11-010918 1/9/2018 0.148 0.00557 0.23 0.000701 µg/L - milligrams per liter NC - no criteria RBSL - risk based screening level * - RBSL exceeded Data Qualifiers: J: The associated value is an estimated quantity. .1+: The associated value is an estimated quantity that may be biased high. J-: The associated value is an estimated quantity that may be biased low. U: The analyte was analyzed for, but was not detected above the level of the associated value. The associated value is the sample quantitation U.1: The analyte was analyzed for, but was not detected. The associated value is an estimate and may be inaccurate or imprecise R: The data is unusable. The analyte may or may not be present. Table 5: Metals Analyses for Groundwater Western Zirconium Plant Area - Winter 2018 Chromium mg/L Hafnium mg/L Iron mg/L Lead mg/L Magnesium mg/L Nickel mg/L Selenium mg/L Silver mg/L Vanadium mg/L Zirconium mg/L 592,244 24,627 1135,556 7,700 NC 95,070 44,052 9,376 6,972 61,566 < 0.00200 U 0.000508 U 0.116 < 0.00200 U 0.405 J 0.0764 0.0006471 0.0000671 0.0109 0.002041+ 0.0004731 < 0.00200 U 0.13 < 0.00200 U 4.58 0.00756 < 0.00200 U < 0.00200 U 0.00375 1 0.000383 U.1 < 0.00200 U 0.000408 U 0.44 0.0005031 2.97 0.0416 0.00725 0.000183 J 0.0448 0.00103 LLI < 0.00200 U 0.00085 U 10.6 < 0.00200 U 126 0.0163 0.0003171 < 0.00200 U < 0.00500 U 0.00125 al < 0.00200 U 0.000389 U 2.28 < 0.00200 U 49 0.00422 < 0.00200 U < 0.00200 U < 0.00500 U 0.000504 U.1 0.0009161 < 0.00200 U 0.106 < 0.00200 U 5.29 0.00203 < 0.00200 U < 0.00200 U 0.0028 J 0.000776 U.1 0.00439 0.00535 0.126 0.00217 141 0.0344 0.0006141 0.0002031 < 0.00500 U 0.1071+ < 0.00200 < 0.00200 U 1.16 < 0.00200 U 459 0.0249 < 0.00200 U < 0.00200 U < 0.00500 U 0.00139 U.I 0.00263 0.0066 0.742 0.00176 J 344 0.00967 < 0.00200 U 0.00146 J <0.00500 U 0.5471+ 0.000444 J 0.000267 U 0.114 < 0.00200 U 104 0.00509 < 0.00200 U < 0.00200 U 0.002081 0.004571+ < 0.00200 U < 0.00200 U 0.278 < 0.00200 U 35 0.00747 0.0003041 < 0.00200 U 0.00365 J 0.000423 U.1 0.001781 0.000357 U 0.253 < 0.00200 U 196 0.00282 0.0006511 0.0006441 < 0.00500 U 0.000498 U.1 < 0.00200 U < 0.00200 U 6.24 < 0.00200 U 80 0.0007961 < 0.00200 U < 0.00200 U < 0.00500 U 0.000244 U.1 < 0.00200 U 0.00029 U 2.43 < 0.00200 U 75 0.00171 J < 0.00200 U < 0.00200 U < 0.00500 U 0.000521 U.I < 0.00200 U < 0.00200 U 0.133 < 0.00200 U 134 0.0007311 0.000468 J < 0.00200 U < 0.00500 U 0.000177 U.I < 0.0020 U < 0.0020 U 6.55 < 0.0020 U 145 0.001411 < 0.0020 U < 0.0020 U < 0.00500 U 0.00652 < 0.0020 U < 0.0020 U < 0.100 U < 0.0020 U 108 0.0561 0.0003621 < 0.0020 U < 0.00500 U 0.00812 < 0.0020 U < 0.0020 U 2.13 < 0.0020 U 83.2 0.0199 < 0.0020 U < 0.0020 U < 0.00500 U 0.0051 < 0.0020 U < 0.0020 U 0.38 < 0.0020 U 115 0.00315 0.000375 J < 0.0020 U < 0.00500 U 0.00116 U < 0.0020 U < 0.0020 U 0.05131 < 0.0020 U 80.9 0.019 < 0.0020 U < 0.0020 U < 0.00500 U 0.000208 U 0.001171 < 0.0020 U 0.07021 < 0.0020 U 38.8 0.00603 0.0002861 < 0.0020 U < 0.00500 U 0.0165 0.0006681 0.000442 U 2.28 < 0.00200 U 116 0.00501 < 0.00200 U < 0.00200 U 0.001341 0.000626 U1 10.6 0.440 555 0.517 194 5.62 0.001611 4.49 0.177 1620 0.001061 < 0.0020 U 0.235 < 0.0020 U 63.1 0.0146 0.000543 J 0.0002521 < 0.00500 U 0.0146 < 0.0020 U < 0.0020 U 0.24 < 0.0020 U 55.3 0.0134 < 0.0020 U 0.0001341 < 0.00500 U 0.003011 Notes: 1. RBSL for worker exposure with hazard index (Hl) = 1 and cancer risk (CR) = 104; frorn Plant Area Monitoring Plan , Table B-1 (URS, 2015). 2. Non-detect results are reported as < method detection limit (MDL), unless otherwise qualified. 3. Wells Pi-3 and A-7 were not sampled. Pi-3 was damaged prior to 2015, and A-7 was abandoned on 10/24/2016. Table 6: Radiological Analyses for Groundwater Western Zirconium Plant Area - Winter 2018 Analyte Unit Gross Alpha pCi/L Gross Beta pCi/L Radium-226 pCi/L Radium-228 pCi/L Thorium-230 pCi/L Thorium-232 pCi/L Uranium2 mg/L RBSC NC NC 41,341 42,859 877,680 791,590 3,265,768 Location ID Sample ID Sample Date Groundwater Concentration3A A-1 GW-A1-011018 1/10/2018 6.8 U 21.5 0.17 U -0.06 U 0.042 U 0.009 U 0.00258 A-3 GW-A3-011018 1/10/2018 8.5 23.8 0.26 0.55 U 0.028 U 0.028 0.00199 J A-4 GW-A4-011018 1/10/2018 21.9 48 0.05 U 0.44 U 0.022 U 0.007 U 0.0123 A-10 GW-A10-011018 1/10/2018 10.8 U 50 0.15 U 1.5 0.12 U 0.045 U 0.0131 A-12 GW-Al2-011018 1/10/2018 5.4 U 52 0.61 2.73 0.097 U 0.017 U 0.0004681 A-13 GW-A13-011018 1/10/2018 2.4 U 52 0.65 1.8 -0.14 U 0.014 U 0.00436 A-16 GW-A16-011018 1/10/2018 21.7 47 0.86 3.19 0.18 U 0.038 U 0.0277 A-17 GW-A17-011018 1/10/2018 -1.5 U 104 0.5 3.7 0.0 U -0.006 U 0.00143 J A-18 GW-A18-011018 1/10/2018 -1.0 U 59 0.34 1.36 0.028 0.029 U 0.000721 J A-19 GW-A19-011018 1/10/2018 1.4 U 19 0.15 U 0.91 -0.087 U 0.008 U 0.00190 J A-20 GW-A20-011018 1/10/2018 16.5 11.8 0.36 0.87 0.001 U 0.038 0.0119 BG-1 GW-BG1-011118 1/11/2018 21 24 0.4 1.03 -0.09 U 0.008 U 0.00491 L-3 GW-L3-011118 1/11/2018 30 J 29 1.04 2.53 0.26 U 0.075 U 0.000776 J L-7 GW-L7-011118 1/11/2018 4.6 U 32 0.73 2.36 -0.003 U 0.00 U 0.000146 J L-10 GW-L10-011018 1/11/2018 29 35 0.25 0.95 0.15 U 0.03 0.00103 J M-1 GW-M1-010918 1/9/2018 5.9 U 25 0.25 2.03 0.00 U -0.02 U 0.000366 J M-2 GW-M 2-010918 1/9/2018 17 38 0.89 2.16 -0.058 U -0.005 U 0.0153 M-3 GW-M 3-010918 1/9/2018 2.2 U 30.1 0.30 LO 0.00 U 0.017 U 0.000192 J M-4 GW-M4-010918 1/9/2018 6.7 62 0.43 3.3 0.00 U 0.0.38 0.000222 J M-7 GW-M7-010918 1/9/2018 4.7 48 U 0.48 1.59 0.16 U 0.096 U 0.00505 M-8 GW-M8-010918 1/9/2018 14.2 18.3 0.24 U 1.29 -0.06 U 0.025 U 0.0172 M-9 GW-M9-011118 1/11/2018 18 U 44 0.15 U 1.32 -0.035 U 0.00 U 0.000805 J Pi-3R GW-Pi3 r-010918 1/9/2018 278 380 18.4 86 6.9 16.8 0.0479 Pi-10 GW-Pi10-010918 1/9/2018 0.2 U 24.9 0.21 U 1.34 0.077 U 0.004 U 0.00160 J Pi-11 GW-Pi11-010918 1/9/2018 2.1 U 22.7 0.78 2.76 0.12 U 0.016 U 0.00115 J pCi/L - picoCuries per liter NC - no criteria RBSL - risk based screening level * - RBSL exceeded Data Qualifiers: J: The associated value is an estimated quantity. J+: The associated value is an estimated quantity that may be biased high. J-: The associated value is an estimated quantity that may be biased low. U: The analyte was analyzed for, but was not detected above the level of the associated value. The associated value is the sample quantitation limit. UJ: The analyte was analyzed for, but was not detected. The associated value is an estimate and may be inaccurate or imprecise R: The data is unusable. The analyte may or may not be present. Notes: 1. RBSL for worker exposure with hazard index (Hl) = 1 and cancer risk (CR) = 104; from Plant Area Monitoring Plan , Table B-1 (URS, 2015). 2. RBSL is 2,206,600 pCi/L for uranium-238. A conversion of 1.48 * pCi/L was used to convert the RBSL for uranium to µg/L. 3. Non-detect results are reported as < method detection limit (MDL), unless otherwise qualified. 4. Wells Pi-3 and A-7 were not sampled. Pi-3 was damaged prior to 2015, and A-7 was abandoned on 10/24/2016. I- 5 µg/L pg/L 70 8 _c pg/L 26,903 < 2.00 U < 2.00 U < 2.00 U < 2.00 U 15.9 < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U 0.723 2.17 1.86 Table 7: VOC Analyses for Groundwater Western Zirconium Plant Area - Winter 2018 Analyte cu _c cu 2 o _c o CD .5" o CO co 2 o _c 1175 o 2 c0 w -0 = c 'En c o -2 w u Unit pg/L p.g/L µg/L µg/L µg/L pg/L RBSL1 87,970 1,975,756 57,232,000 6,673 101,288 149,171 Location ID Sample ID Sample Date Groundwater Concentration2'3'4 A-1 GW-A1-011018 1/10/2018 < 2.00 U 2.81 J aa•O'''-'- 2.24 < 2.00 U < 2.00 U A-3 GW-A3-011018 1/10/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U A-4 GW-A4-011018 1/10/2018 < 2.00 U < 5.00 U , ::3371 .1.971 < 2.00 U < 2.00 U A-10 GW-A10-011018 1/10/2018 158 < 5.00 U < 2.00 U < 2.00 U < 2.00 U A-12 GW-Al2-011018 1/10/2018 < 2.00 U < 5.00 U <10.0 < 2.00 U < 2.00 U < 2.00 U A-13 GW-A13-011018 1/10/2018 < 2.00 U < 5.00 U <10.0 u < 2.00 U < 2.00 U < 2.00 U A-16 GW-A16-011018 1/10/2018 < 2.00 U < 5.00 U 2.:34 < 2.00 U 1.39 .1 < 2.00 U A-17 GW-A17-011018 1/10/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U A-18 GW-A18-011018 1/10/2018 < 2.00 U < 5.00 U 4.,50j1 < 2.00 U < 2.00 U < 2.00 U A-19 GW-A19-011018 1/10/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U A-20 GW-A20-011018 1/10/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U BG-1 GW-BG1-011118 1/11/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U L-3 GW-L3-011118 1/11/2018 < 2.00 U < 5.00 U 442 J < 2.00 U < 2.00 U < 2.00 U L-7 GW-L7-011118 1/11/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U L-10 GW-L10-011018 1/11/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U M-1 GW-M1-010918 1/9/2018 < 2.00 U 0.921- < 10.0 U < 2.00 U < 2.00 U < 2.00 U M-2 GW-M2-010918 1/9/2018 < 2.00 U < 5.00 U j0J < 2.00 U < 2.00 U < 2.00 U M-3 GW-M3-010918 1/9/2018 < 2.00 U < 5.00 U <10.0 U < 2.00 U < 2.00 U < 2.00 U M-4 GW-M4-010918 1/9/2018 < 2.00 U 785 < 2.00 U < 2.00 U 1.771 M-7 GW-M7-010918 1/9/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U M-8 GW-M8-010918 1/9/2018 < 2.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U M-9 GW-M9-011118 1/11/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U Pi-3R GW-Pi3r-010918 1/9/2018 < 2.00 U 1:19 J r 251i < 2.00 U 0.58 J < 2.00 U Pi-10 GW-Pi10-010918 1/9/2018 < 2.00 U < 5.00 U 10.0 U < 2.00 U < 2.00 U < 2.00 U Pi-11 GW-Pi11-010918 1/9/2018 < 2.00 U < 5.00 U < 10.0 U < 2.00 U < 2.00 U < 2.00 U w w o 2 co c 0 E .c ..., ..c cu 66 E u 3 c cu >. 2 2 A x o o _c u u u p.g/L pg/L µg/L pg/1_ 272,704 2,691,575 77,418 345,384 11,450 714,521 672,147 13,749 12,952 < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U 1.17 .0* < 2.00 U < 2.00 U < 1.00 U 0.880 < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U _0.870 < 2.00 U < 2.00 U < 2.00 U 0.780 J < 2.00 U < 2.00 U < 1.00 U < 3.00 U 197:, < 2.00 U < 2.00 U < 2.00 U < 2.00 U 4;79 79:6 1.34 < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U 0.900J .$ < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U 0.950 J < 2.00 U < 2.00 U 15.1 < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U 0.59 J < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U < 3.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 2.00 U < 1.00 U Notes: 1. RBSL for worker exposure with hazard index (HI) = 1 and cancer risk (CR) = from Plant Area Monitoring Plan , Table B-1 (URS, 2015). 2. Non-detect results are reported as < method detection limit (MDL), unless otherwise qualified. 3. Only detected analytes are presented in table. 4. Wells Pi-3 and A-7 were not sampled. Pi-3 was damaged prior to 2015, and A-7 was abandoned on 10/24/2016. Data Qualifiers: J: The associated value is an estimated quantity. J+: The associated value is an estimated quantity that may be biased high. J-: The associated value is an estimated quantity that may be biased low. U: The analyte was analyzed for, but was not detected above the level of the associated value. The associated value is the sample quantitation limit. UJ: The analyte was analyzed for, but was not detected. The associated value is an estimate and may be inaccurate or imprecise R: The data is unusable. The analyte may or may not be present. 1..kg/L - milligrams per liter NC - no criteria RBSL - risk based screening level Detected results are Oladed in grey; * - RBSL exceeded Table 8: SVOC Analyses for Groundwater Western Zirconium Plant Area - Winter 2018 Analyte Unit RBS1.1 cu 4, to 15 .c +., _c 13 D. c -, cu >. .c x a. a) a) 5. .c c _c 5. cu _c i 75- ... a) .c .... ei r41 -C 0_ oa i-- m en El z µg/L µg/L µg/L 102,200 408,800 4,980 o 2 o .c a_ D. pg/L pg/L 2,373 1,597,707 Location ID Sample ID Sample Date Groundwater Concentration 2'3'4 A-1 GW-A1-011018 1/10/2018 < 9.96 U < 9.96 U < 9.96 U < 0.996 23.1 A-3 GW-A3-011018 1/10/2018 < 9.89 U < 9.89 U < 9.89 U < 0.989 < 9.89 U A-4 GW-A4-011018 1/10/2018 < 9.90 U < 9.90 U < 9.90 U < 0.990 < 9.90 U A-10 GW-A10-011018 1/10/2018 < 9.89 UJ < 9.89 U < 9.89 U < 0.989 < 9.89 U1 A-12 GW-Al2-011018 1/10/2018 < 9.94 U < 9.94 U < 9.94 U < 0.994 < 9.94 U A-13 GW-A13-011018 1/10/2018 < 9.94 U < 9.94 U < 9.94 U < 0.994 < 9.94 U A-16 Gw-A16-011018 1/10/2018 < 9.89 U < 9.89 U < 9.89 U < 0.989 < 9.89 U A-17 GW-A17-011018 1/10/2018 < 9.97 U < 9.97 U < 9.97 U < 0.997 < 9.97 U A-18 GW-A18-011018 1/10/2018 < 9.96 U < 9.90 U < 9.90 U < 0.990 < 9.90 U A-19 GW-A19-011018 1/10/2018 < 9.96 U < 9.96 U < 9.96 U < 0.996 < 9.96 U A-20 GW-A20-011018 1/10/2018 < 9.91 U < 9.91 U < 9.91 U < 0.991 < 9.91 U BG-1 GW-BG1-011118 1/11/2018 < 9.90 U < 9.90 U < 9.90 U < 0.990 < 9.90 U L-3 GW-L3-011118 1/11/2018 < 9.85 UJ < 9.85 U < 9.85 U < 0.985 < 9.85 UJ L-7 GW-L7-011118 1/11/2018 < 9.83 U < 9.83 U < 9.83 U < 0.993 < 9.83 U L-10 GW-L10-011018 1/11/2018 < 9.86 U < 9.86 U < 9.86 U < 0.986 < 9.86 U M-1 GW-M1-010918 1/9/2018 < 9.91 U < 9.91 U < 9.91 U < 0.991 < 9.91 U M-2 GW-M2-010918 1/9/2018 < 9.95 U < 9.95 U < 9.95 U < 0.995 < 9.95 U M-3 GW-M3-010918 1/9/2018 < 9.85 U < 9.85 U < 9.85 U < 0.985 < 9.85 U M-4 GW-M4-010918 1/9/2018 12.2 < 9.92 U < 9.92 U < 0.992 8.80 J M-7 GW-M7-010918 1/9/2018 < 9.94 U < 9.94 U < 9.94 U < 0.994 < 9.94 U M-8 GW-M8-010918 1/9/2018 < 9.94 U < 9.94 U < 9.94 U < 0.994 < 9.94 U M-9 GW-M9-011118 1/11/2018 < 9.83 U < 9.83 U < 9.83 U < 0.983 < 9.83 U Pi-3R GW-Pi3r-010918 1/9/2018 < 9.86 U < 9.86 U < 9.86 U < 0.986 < 9.86 U Pi-10 GW-Pi10-010918 1/9/2018 < 9.91 U < 9.91 U < 9.91 U < 0.991 < 9.91 U Pi-11 GW-Pi11-010918 1/9/2018 < 9.87 U < 9.87 U < 9.87 U < 0.987 < 9.87 U Data Qualifiers: J: The associated value is an estimated quantity. .14-: The associated value is an estimated quantity that may be biased high. J-: The associated value is an estimated quantity that may be biased low. U: The analyte was analyzed for, but was not detected above the level of the associated value. The associated value is the sample quantitation limit. UJ: The analyte was analyzed for, but was not detected. The associated value is an estimate and may be inaccurate or imprecise R: The data is unusable. The analyte may or may not be present. 1.1g/L - milligrams per liter NC - no criteria RBSL - risk based screening level Detected results pie 4mclecl ìn grey. * - RBSL exceeded Plant Area Semi-Annual Monitoring Report Winter 2018 FIGURES Regional Overview Map Plant Area Monitoring Report Western Zirconium Ogden, Utah A, WesT ngal.se WOODARD CURRAN FIGURE 1 Woodard & Curran shall assume no liability for any of the following; 1Any errors, omissions, or inaccuracies in the information provided regardless of how caused or; 2.Any decision or action taken or not taken by the reader in reliance upon any information or data furnished hereunder. SCALE: 1 " = 3 miles DOC: FiglRegOverview.mxd DATE: May 2017 PROJECT #: 7200-2017-102 DRAWN BY: DRH SOURCE: STATE INDEX Source of aerial photography USDS, National Agricultural imagery Program (NAIP), 2016 ativith mu am, VI A I 16,0,19- ,..—M11111i 400 AAA, 4 Ado 41414 F Source of aerial photography: Utah AGRC, 2012 6-inch 0 Monitoring Location, Sampled 0 Monitoring Location, Not Sampled g2oodard & Curran shall assume no liability for any of the following; 1.Any errors, oissions, or inaccuracies in the information provided regardless of how caused or; .Any decision or action taken or not taken by the reader in reliance upon any information or data furnished hereunder. SCALE: 1 " = 600 ' DOC: Fig2MonLocations 2018SA1.mxd DATE: MAY 2018 PROJECT #: 7200-2017-102 DRAWN BY: DRH SOURCE: 1 Monitoring Locations , Plant Area Monitoring Report Western Zirconium Ogden, Utah 4 .... "il Westinghouse WOODARD CURRAN FIGURE 2 Notes: *Groundwater elevation not used for potentiometric surface contours. This was based on professional judgment of the data quality and accuracy. Units for groundwater elevations are feet above mean seal level (ft amsl). Pi:•3R 4222:88: „4229.42 4223.92 y Source of aerial photography: Utah AGRC, 2012 6-inch Monitoring Location Monitoring Well Destroyed or Abandoned Potentiometric Contour (ft amsl) Woodard & Curran shall assume no liability for any of the following; 1.Any errors, issions, or inaccuracies in the information provided regardless of how caused or; D .i Any decision or action taken or not taken by the reader in reliance upon any information or data furnished hereunder. SCALE: 1 " = 600 ' DOC: Fig3PotentSurface_2018SA1.mxd DATE: MAY 2018 PROJECT #: 7200-2017-102 DRAWN BY: DRH SOURCE: Potentiometric Surface Map Plant Area Monitoring Report Western Zirconium Ogden, Utah ...4.4. Westnghouse WOODARD CURRAN FIGURE 3 Plant Area Semi-Annual Monitoring Report Winter 2018 APPENDIX A FIELD SAMPLING LOGS (Included on CD Insert) Plant Area Semi-Annual Monitoring Report Winter 2018 APPENDIX B DATA VALIDATION REPORT (Included on CD Insert) Plant Area Semi-Annual Monitoring Report Winter 2018 APPENDIX C ANALYTICAL LABORATORY DATA REPORTS (Included on CD Insert)