Clean Air Status and Trends Network Third Quarter 2023 Quality Assurance Report Summary of Quarterly Operations (July through September) EPA Contract No. 68HERH21D0006 Introduction This quarterly report summarizes results from the Clean Air Status and Trends Network (CASTNET) quality assurance/quality control (QA/QC) program for data collected during third quarter 2023. The various QA/QC criteria and policies are documented in the CASTNET Quality Assurance Project Plan (QAPP; WSP, 2022). The QAPP is comprehensive and includes standards and policies for all components of project operation from site selection through final data reporting. It is reviewed annually and updated as warranted. Quarterly Summary During July 2023, WSP's CASTNET QA Manager was notified via EPA Chief Information Officer directives that EPA's QA/R-5, "EPA Requirements for QA Project Plans" had been superseded by "Quality Assurance Project Plan Standard" (CIO 2105-S-02.0). The QA Manager evaluated the changes and verified the effects of the updates on the CASTNET QAPP Revision 10.1. The only update required by the new standard was to identify the providers of the subcontracted field technicians: Inquest Environmental, Inc.; Trinity Consultants, Inc.; and S&P AQS. The QAPP Revision 10.1 includes rebranding from Wood Environment & Infrastructure Solutions, Inc. to WSP Environment & Infrastructure Inc. (WSP) and updates to identify field subcontractors to align with the new directive. WSP will submit Revision 10.1 to EPA for review and comment during fourth quarter 2023. The WSP Quality Management Plan (QMP) is under the purview of the WSP Regional Quality Manager who is also the CASTNET Project QA Supervisor. The QA Manager notified the Project QA Supervisor that EPA's QA/R-2, "EPA Requirements for Quality Management Plans" had been superseded by "Quality Management Plan Standard" (CIO 2105-S-01.1). WSP submitted results of analyses for proficiency test (PT) study 122 for Rain and Soft Waters to the Water Science and Technology (WS&T) Directorate, a branch of Environmental Science and Technology Laboratories with ECCC. The WS&T Directorate provides quality assurance and proficiency testing services. Total nitrogen was one of the parameters offered under PT study 122, and WSP submitted results of analyses of total nitrogen along with the standard CASTNET parameters analyzed for PT studies. Final results were rated, "Good." However, two calcium values and three sodium values were flagged indicating potential low bias. WSP is currently troubleshooting the cause of the low values and has contacted PerkinElmer, the manufacturer of the inductively coupled plasma-optical emission spectrometry (ICP-OES) instrument used to analyze the PT samples. There has been no indication of recent bias in CASTNET samples or standards. A corrective action has been initiated. Preparation of the presentation for the annual management review and report in support of International Organization for Standardization (ISO)/lnternational Electrotechnical Commission (IEC) 17025:2017 accreditation was completed, and the CASTNET QA Manager scheduled the WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 1 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 presentation for July 26, 2023. Attendees included the CASTNET Project QA Supervisor, CASTNET management team, WSP regional management, and WSP QA management. EEMS performed annual performance evaluation (PE) audits of the ROM406/206 co-located ozone systems on August 17, 2023. The ozone system used for regulatory purposes is the ROM406 system. EEMS notified WSP that the ROM206 site failed the audit. A WSP field technician tested the analyzer and solenoids and found no problems. The zsp QC checks of the ROM206 site analyzer were within criteria. However, the ROM206 analyzer was slower to respond than the ROM406 analyzer during the audit. Co-located responses compared well during routine ambient monitoring both before and after the audit. WSP replaced the ozone analyzer. Once the ozone analyzer that was in operation during the August PE audit is returned to WSP's Gainesville office, it will be evaluated to try to determine the cause of the problem. Additionally, during the ROM206 PE audit, EEMS noted the temperature probe shield at the site as not being located properly in accordance with the CASTNET QAPP. WSP reviewed the QAPP temperature probe placement requirement. It states that probe inlets be "pointed north or otherwise positioned to avoid radiated heat sources such as buildings, walls, etc." During a PE audit by EEMS at the MCK131/231, KY site, the Nafion dryer at the MCK231 site was broken. As a result, WSP believes the MCK131/231 audit results were suspect. The MCK231 Nafion dryer stopped working as of September 22, 2023. The ozone analyzer at MCK231 is currently operating without the Nafion dryer. A temperature sensor at the PARI 07, WV site failed a PE audit at the highest level (49C) on August 8, 2023. A corrective action has been opened as required under accreditation requirements for ISO/IEC 17025:2017 accreditation by the A2LA. EPA Region 3 contacted EPA CAMD to offer a "mini" technical systems audit (TSA) of the ozone system at the PARI07 site consisting of a field site visit but no laboratory facility audit. WSP coordinated the field site TSA on August 21, 2023, with the site operator and EPA Region 3. The Region 3 auditor was very thorough with her assessment of the site operator's abilities and the CASTNET ozone system. The site audit went well. The auditor contacted the QA Manager and expressed satisfaction with the site operator's level of knowledge and cooperation. The CASTNET Project Manager found a problem with the hourly flow data that was related to an issue with the NPS/BLM continuous data exports received by WSP. Some flow data were flagged incorrectly. Concentration data for 2000 through 2023 were rerun to correct the flagging errors and recalculate weekly values. Table 1 lists the quarters of data that were validated to Level 3 during third quarter 2023 by site calibration group. Table 2 lists the sites in each calibration group along with the calibration schedule. Table 3 presents the measurement criteria for laboratory filter pack measurements. These criteria apply to the QC samples listed in the following section of this report. Table 4 presents the critical criteria for ozone monitoring. Table 5 presents the critical criteria for trace-level gas monitoring. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 2 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Quality Control Analysis Count The QC sample statistics presented in this report are for reference standards (RF) and continuing calibration verification spikes (CCV) used to assess accuracy and for replicate sample analyses (RP) used to assess "in-run" precision. In addition, laboratory method blanks (MB) containing reagents without a filter; laboratory blanks (LB) containing reagents and a new, unexposed filter; and field blanks (FB) containing reagents and an unexposed filter that was loaded into a filter pack assembly and shipped to and from the monitoring site while remaining in sealed packaging are also included. Table 6 presents the number of analyses in each category that were performed during third quarter 2023. Sample Receipt Statistics Ninety-five percent of field samples from EPA-sponsored sites must be received by the CASTNET laboratory in Gainesville, FL no later than 14 days after removal from the sampling tower. Table 7 presents the relevant sample receipt statistics for third quarter 2023. Data Quality indicator (DQI) Results Figures 1 through 3 present the results of RF, CCV, and RP QC sample analyses for third quarter 2023. All results were within the criteria listed in Table 3. Table 8 presents summary statistics of critical criteria measurements at ozone sites collected during third quarter 2023. The statistics presented contain data validated at Level 2 and Level 3. All data associated with QC checks that fail to meet the criteria listed in Table 4 were or will be invalidated unless the cause of failure has no effect on ambient data collection, and passing results still meet frequency criteria. Results in shaded cells either exceed documented criteria or are otherwise notable. Table 9 presents observations associated with the shaded cell results in Table 8. Table 10 presents summary statistics of critical criteria measurements at trace-level gas monitoring sites collected during third quarter 2023. The statistics presented contain data validated at Level 2 and Level 3. All data associated with QC checks that fail to meet the criteria listed in Table 5 were or will be invalidated unless the cause of failure has no effect on ambient data collection, and passing results still meet frequency criteria. Results in shaded cells either exceed documented criteria or are otherwise notable. Table 11 presents observations associated with the shaded cell results in Table 10. Laboratory Control Sample Analysis The laboratory control sample (LCS) is a reagent blank spiked with the target analytes from the established analytical methods and carried through the same extraction process that field samples must undergo. LCS analyses are performed by the laboratory to monitor for potential sample handling artifacts and provide a means to identify possible analyte loss from extraction to extraction. Figure 4 presents LCS analysis results for third quarter 2023. All recovery values were between 85.9 percent and 109.6 percent. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 3 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Blank Results Figures 5 through 7 present the results of MB, LB, and FB QC sample analyses for third quarter 2023. All third quarter results were within criteria (two times the reporting limit) listed in Table 3. Suspect/Invalid Filter Pack Samples Filter pack samples that were flagged as suspect or invalid during third quarter 2023 are listed in Table 12. This table also includes associated site identification and a brief description of the reason the sample was flagged. During third quarter, nine filter pack samples were invalidated. Field Problem Count Table 13 presents counts of field problems affecting continuous data collection for more than one day for third quarter 2023. The problem counts are sorted by a 30-, 60-, or 90-day time period to resolution. A category for unresolved problems is also included. References American Society for Testing and Materials (ASTM). 2022. ASTM E29-22, "Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications." ASTM International, West Conshohocken, PA, DOI:10.1520/E0029-22. www.astm.org. U.S. Environmental Protection Agency (EPA). 2022. Title 40 Code of Federal Regulations Part 58, "Appendix A to Part 58 - Quality Assurance Requirements for Monitors used in Evaluations of National Ambient Air Quality Standards." WSP USA Environment & Infrastructure Inc. (WSP) formerly known as Wood USA Environment & Infrastructure Inc. 2022. Clean Air Status and Trends Network (CASTNET) Quality Assurance Project Plan (QAPP) Revision 9.5. Prepared for the U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Atmospheric Protection, Clean Air Markets Division, Washington, DC. Contract No. 68HERH21D0006. Gainesville, FL. https: //j ava. e pa. g ov/castn et/docu m e nts. do. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 4 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 1 Data Validated to Level 3 through Third Quarter 2023 Calibration Group* Months Available Number of Months Complete Quarters Number of Quarters E-3/W-10t November 2022- April 2023 6 Quarter 1 2023 1 SE-4/MW-6* January 2023- June 2023 6 Quarter 1 2023- Quarter2 2023 2 Notes: "The sites contained in each calibration group are listed in Table 2. ~Contains ROM206 of the ROM406/ROM206 co-located pair ~Contains MCK131/231 co-located pair Table 2 Field Calibration Schedule for 2023 Calibration Group Months Calibrated Sites Calibrated Eastern Sites (22 Total) E-1 (8 Sites) February/August BEL116, MD WSP 144, NJ ARE128, PA PED108, VA BWR139, MD CTH110, NY PSU106, PA VPI120, VA E-2 (9 Sites) April/October ABT147, CT CAT175, NY NIC001,NY ASH135, ME HWF187, NY1 EGB181,ON WST109, NH WFM105, NY UND002, VT E-3 (5 Sites) May/November KEF112, PA LRU 17, PA CDR119,WV MKG113, PA PARI07, WV Southeastern Sites (11 Total) SE-4 (7 Sites) January/July SND152, AL BFT142, NC COW137, NC SPD111,TN GAS 153, GA CND125, NC DUK008, NC1 SE-5 (4 Sites) February/August CAD150, AR SUM156, FL IRL141, FL CVL151, MS Midwestern Sites (18 Total) MW-6 (6 Sites) January/July CDZ171, KY MCK131, KY PNF126, NC1 CKT136, KY MCK231, KY ESP127, TN MW-7 (8 Sites) March/September BVL130, IL2 VIN140, IN DCP114, OH QAK172, OH STK138, IL RED004, MN OXF122, OH PRK134,WI MW-8 (4 Sites) April/October SAL133, IN ANA115, Ml HOX148, Ml UVL124, Ml Western Sites (13 Total) W-9 (5 Sites) March/September KNZ184, KS CHE185, OK ALC188, TX KIC003, KS SAN189, NE W-10 (8 Sites) May/November LPO010, CA ROM206, CO3 PAL190, TX CNT169,WY GTH161, CO NPT006, ID UMA009, WA PND165,WY3 Notes: 1Trace-level gas calibrations are performed quarterly in January, April, July, and October. 2Trace-level gas calibrations are performed quarterly in March, June, September, and December. 3Trace-level gas calibrations are performed quarterly in February, May, August, and November. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 5 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 3 Data Quality Indicators forCASTNET Laboratory Measurements Analyte Method Precision1 (MARPD) Accuracy2 (%) Nominal Reporting Limits3 mg/L jjg/Filter Ammonium (NH4) AC 20 90-110 0.020* 0.5 Sodium (Na+) ICP-OES 20 95-105 0.005 0.125 Potassium (K+) ICP-OES 20 95-105 0.006 0.15 Magnesium (Mg2+) ICP-OES 20 95-105 0.003 0.075 Calcium (Ca2+) ICP-OES 20 95-105 0.006 0.15 Chloride (CI ) IC 20 95-105 0.020 0.5 Nitrate (N03) IC 20 95-105 0.008* 0.2 Sulfate (SO4) IC 20 95-105 0.040 1.0 Notes: 1This column lists precision goals for both network precision calculated from co-located filter samples and laboratory precision based on replicate samples for samples > five times the reporting limit. The criterion is ± the reporting limit if the sample is < five times the reporting limit. 2This column lists laboratory accuracy goals based on reference standards and continuing calibration verification spikes. The criterion is 90-110 percent for ICP-OES reference standards. 3The reporting limit for sulfate on cellulose filters is 0.080 mg/L (2.0 |jg/filter). AC = automated colorimetry IC = ion chromatography ICP-OES = inductively coupled plasma-optical emission spectrometry MARPD = mean absolute relative percent difference mg/L = milligrams per liter |jg/Filter = micrograms per filter * = as nitrogen Values are rounded according to American Society for Testing and Materials (ASTM) E29-22, "Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications" (ASTM, 2022). For more information on analytical methods and associated precision and accuracy criteria, see the CASTNET QAPP, (WSP, 2022). Table 4 Ozone Critical Criteria* Type Check Analyzer Response Zero Less than ± 3.1 parts per billion (ppb) Span Less than ± 7.1 percent between supplied and observed concentrations Single Point QC Less than ± 7.1 percent between supplied and observed conentrations Notes: 'Applies to CASTNET sites that are configured and operated in accordance with Part 58 of Title 40 of the Code of Federal Regulations (EPA, 2022). The minimum frequency for these checks is once every two weeks. Values are rounded according to ASTM E29-22, "Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications" (ASTM, 2022). WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 6 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 5 Trace-level Gas Monitoring Critical Criteria* Parameter Analyzer Response Zero Check Span Check / Single Point QC Check so2 Less than ± 1.51 ppb Less than ±10.1 percent between supplied and observed concentrations NOy Less than ± 1.51 ppb CO Less than ± 50 ppb Notes: 'Applies to CASTNET sites that are configured and operated in accordance with Part 58 of Title 40 of the Code of Federal Regulations (EPA, 2022). The minimum frequency for these checks is once every two weeks. Values are rounded according to ASTM E29-22, "Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications" (ASTM, 2022). SO, = sulfur dioxide NOy = total reactive oxides of nitrogen CO = carbon monoxide ppb = parts per billion Table 6 QC Analysis Count for Third Quarter 2023 Filter Type Parameter RF Sample Count CCV Sample Count RP Sample Count MB Sample Count LB Sample Count FB Sample Count Teflon S024 54 150 63 13 22 43 no3 54 150 63 13 22 43 nh; 26 135 62 13 22 43 CI" 54 150 63 13 22 43 Ca2+ 26 135 62 13 22 43 Mg2+ 26 135 62 13 22 43 Na+ 26 135 62 13 22 43 K+ 26 135 62 13 22 43 Nylon so2" 27 125 56 8 22 43 no3 27 125 56 8 22 43 Cellulose S024 38 133 60 12 24 85 Table 7 Filter Pack Receipt Summary for Third Quarter 2023 Count of samples received more than 14 days after removal from tower: 15 Count of all samples received 652 Fraction of samples received within 14 days: 0.977 Average interval in days: 5.299 First receipt date: 7/1/2023 Last receipt date: 9/27/2023 Note: Sample shipments for the Egbert, Ontario site (EGB181) are in groups of four. Samples associated with EGB181 are excluded from this statistic. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 7 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 8 Ozone QC Summary for Third Quarter 2023 (1 of 2) Site ID % Span Pass1 Span [%D]2 % Single Point QC Pass1 Single Point QC [%D]2 % Zero Pass1 Zero Average (PPb)2 ABT147, CT 100.00 2.79 100.00 2.62 100.00 0.41 ALC188, TX 100.00 0.53 100.00 0.78 100.00 0.34 ANA115, Ml 100.00 1.84 100.00 2.53 100.00 0.40 ARE128, PA 100.00 1.99 100.00 2.44 100.00 0.84 ASH135, ME N/A N/A N/A N/A N/A N/A BEL116, MD 100.00 1.45 100.00 0.60 100.00 0.32 BFT142, NC 100.00 2.89 100.00 2.94 100.00 0.37 BVL130, IL 100.00 2.24 100.00 3.43 98.88 1.31 BWR139, MD 100.00 1.60 100.00 1.11 98.94 0.43 CAD150, AR 100.00 3.69 100.00 3.74 100.00 0.30 CDR119, WV N/A N/A N/A N/A N/A N/A CDZ171, KY N/A N/A N/A N/A N/A N/A CKT136, KY 100.00 1.24 100.00 1.41 100.00 0.15 CND125, NC 100.00 1.38 100.00 1.48 100.00 0.25 CNT169, WY 100.00 2.12 100.00 2.46 100.00 0.65 COW137, NC 100.00 0.60 100.00 1.11 100.00 0.28 CTH110, NY 100.00 1.77 100.00 1.52 100.00 0.18 CVL151, MS 100.00 1.98 100.00 2.12 100.00 0.27 DCP114, OH N/A N/A N/A N/A N/A N/A DUK008, NC 100.00 2.92 100.00 2.73 100.00 0.99 ESP127, TN 100.00 1.34 100.00 1.55 100.00 0.37 GAS 153, GA 100.00 1.04 100.00 1.92 100.00 0.66 GTH161, CO 100.00 2.36 100.00 2.13 100.00 0.26 HOX148, Ml 94.79 10.02 95.79 9.29 100.00 0.28 HWF187, NY N/A N/A N/A N/A N/A N/A IRL141, FL 98.88 2.14 100.00 1.79 100.00 0.43 KEF112, PA 100.00 3.35 100.00 1.75 100.00 0.55 LPO010, CA 98.95 1.89 100.00 1.43 100.00 0.46 LRU 17, PA 100.00 1.88 100.00 1.53 100.00 0.35 MCK131, KY 100.00 0.67 100.00 0.83 100.00 0.19 MCK231, KY 88.12 2.75 94.06 2.41 95.00 0.67 MKG113, PA 97.89 4.56 95.79 4.86 96.84 0.80 NPT006, ID 100.00 1.73 100.00 1.86 100.00 0.12 OXF122, OH 100.00 1.62 100.00 1.49 100.00 0.27 PAL 190, TX 100.00 1.92 100.00 2.24 100.00 0.45 PARI 07, WV 100.00 1.50 100.00 1.23 100.00 0.15 PED108, VA 100.00 1.84 100.00 2.21 100.00 0.28 PND165, WY 100.00 3.49 100.00 2.75 100.00 0.73 PNF126, NC N/A N/A N/A N/A N/A N/A PRK134, Wl 100.00 2.18 97.98 2.32 97.98 0.43 PSU106, PA 96.00 2.64 95.00 5.15 97.00 0.72 QAK172, OH 100.00 1.63 100.00 3.37 100.00 0.65 WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 8 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 8 Ozone QC Summary for Third Quarter 2023 (2 of 2) Site ID % Span Pass1 Span [%D]2 % Single Point QC Pass1 Single Point QC [%D]2 % Zero Pass1 Zero Average (ppb)2 ROM206, CO 98.77 1.81 100.00 1.50 100.00 0.21 SAL 133, IN 100.00 1.06 100.00 0.99 100.00 0.34 SAN 189, NE 100.00 1.34 100.00 1.61 100.00 0.27 SND152, AL 100.00 1.28 100.00 1.66 97.89 0.43 SPD111, TN 99.07 1.71 100.00 2.07 100.00 0.56 STK138, IL 100.00 3.50 100.00 3.37 100.00 0.86 SUM156, FL 100.00 2.58 100.00 2.91 100.00 0.15 UMA009, WA 100.00 0.50 100.00 0.69 100.00 0.30 UVL124, Ml 100.00 1.65 98.96 1.17 100.00 0.52 VIN140, IN 100.00 1.44 100.00 1.42 100.00 0.17 VPI120, VA 96.36 1.90 93.33 3.04 96.19 0.60 WSP144, NJ 100.00 1.28 98.84 1.54 96.51 0.48 WST109, NH N/A N/A N/A N/A N/A N/A Notes: Percentage of comparisons that pass the criteria listed in Table 4. Values falling below 90 percent are addressed in Table 9. 2Absolute value of the average percent differences between the on-site transfer standard and the site monitor. Values exceeding the criteria listed in Table 4 are addressed in Table 9. %D = percent difference ppb = parts per billion Table 9 Ozone QC Observations for Third Quarter 2023 Site ID QC Criterion Comments HOX148, Ml Span |%D| Single Point QC |%D| Site analyer pump failed on 8/14/2023 and was replaced on 8/16/2023. Associated data will be invalidated. MCK231, KY % Span Pass The ozone dryer was broken on 9/22/2023, and the Nation dryer was bypassed on 9/29/2023. Note: %D = percent difference WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 9 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 10 Trace-level Gas QC Summary for Third Quarter 2023 Parameter % Span Pass1 Span [%D]2 % Single Point QC Pass1 Single Point QC [%D]2 % Zero Pass1 Zero Average (ppb)2 BVL130, IL so2 100.00 2.48 90.48 5.28 100.00 0.57 NOy 95.65 5.40 95.56 18.99 95.56 2.96 CO 100.00 1.21 100.00 3.76 100.00 24.91 DUK008, NC NOy 100.00 3.44 100.00 1.73 97.83 2.21 HWF187, NY NOy N/A N/A N/A N/A N/A N/A PND126, NC NOy 100.00 1.78 100.00 2.63 100.00 0.26 PNF126, NC NOy N/A N/A N/A N/A N/A N/A ROM206, CO NOy 97.92 1.77 97.92 2.76 100.00 0.38 Notes: Percentage of comparisons that pass the criteria listed in Table 5. Values falling below 90 percent are addressed in Table 11. 2Absolute value of the average percent differences between the supplied and observed concentrations. Values exceeding the criteria listed in Table 5 are addressed in Table 11. %D = percent difference ppb = parts per billion Table 11 Trace-level Gas QC Observations for Third Quarter 2023 Site ID Parameter QC Criterion Comments BVL130, IL NOy Single Point QC |%D| An extra filter was erroneously installed resulting in a flow restriction. Associated data will be invalidated. Note: %D = percent difference Table 12 Filter Packs Flagged as Suspect or Invalid During Third Quarter 2023 Site ID Sample No. Reason CND125, NC 2330001-14 2331001-14 The site had data logger issues due to low voltage from the battery pack. CVL151, MS 2331001-18 Data logger issues KNZ184, KS 2329001-29 Flow pump was left off until the broken knockout bottle was replaced. SHE604, WY 2327005-05 2328005-05 2329005-05 2330005-05 2331005-05 The flow pump and the mass flow controller failed. Both were replaced. WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 10 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report- Third Quarter 2023 Table 13 Field Problems Affecting Data Collection Days to Resolution Problem Count 30 324 60 7 90 0 Unresolved by end of quarter 0 WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 11 of 18 ------- EPA Contract No. 68HERH21D0006 Figure 1 Reference Standard Results for Third Quarter 2023 (percent recovery) CASTNET Quality Assurance Report - Third Quarter 2023 RF - Teflon ICP-OES Ca ¦ Mg• NaA K o o 8 2 Q O 2 ~ ~ o a L A A £ ! J, -fN 8 8 * ° o 4 o 2 if 8 6 1 $ o & o o c Q A o o o 0 A i 4E i o & o ^ O o u A o o O 8 u 7/2/2023 ' 7/14/2023 7/26/2023 8/19/2023 8/7/2023 § ly 9/12/2023 9/24/2023 RF-Teflon IC&AC ~ TS04# TN03# TNH4A Cl 0 Oft o $ Q as ce Q _ _ A j 29 o 6d f6 9 cP * & \ 4J AA^ G 1 J A J 4 M i a © 0 Aa ©A 3 A A 1 s A AA 0 o 8 8 o O o O i 1 8/31/2023 § § 1 ^ ~ NS04# NHN03 A .A A AA AA . A A A A A » A . A A o A > ; 8/19/2023 9/12/2023 Analysis Date A WS02 I « 1 l ^i [*j | | "A i aa o aa A 1 * A M jA "| | aA A e A ! I A r ] 1 3 I 8/19/2023 § 9/12/2023 9/24/2023 Analysis Date WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 12 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Figure 2 Continuing Calibration Spike Results for Third Quarter 2023 (percent recovery) Ca ¦ Mg« NaA. K 0 1 o A G o r» O o Q j 2 - S c 5 | B i \ 3 ? B 1 I 5 u f s o o 2 o o 7/2/2023 n 7/26/2023 8/7/2023 8/19/2023 8/31/2023 s 9/24/2023 Analysis Date ~ NS04# NHN03 A 1 A 5 A * A -a aa ft AA J —*4 -si A* 1 °S COD Qf» 6 A wA **A a .a A A it 1 A aS A : Analysis Date ccv Cellulose IC A WS02 105 j*~ A £¦ S 100 i i A 95 90 3 1 Analysis Date 8/19/2023 S i 9/12/2023 WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 13 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Figure 3 Replicate Sample Analysis Results for Third Quarter 2023 (percent difference) RP - Teflon ICP-OES Ca ¦ Mg# NaA K A A o r\ o A 0 o c f n ft Q \ 8 J 1 a I I § s J 9 I p ! B 1 t§ o RP - Teflon IC & AC ~ TS04# TN03# TNH4A Cl o o °8 o _ f~\ °0 « A 0 . 0 KJ 0° to A i 0° oA flt a§ s. J t £ SL22 S 0 1 $ i § § 6 I 3 ro s ! | 1 ~ NS04# NHN03 A A A A A A u A aa A A A A AA V A . A A A 1* A ^ »w 1 1 ! £ e? § i ; g O j i ' 1 9/12/2023 9/24/2023 Analysis Date A WS02 A 1 ' 7/2/2023 I 3 ; | i i 9/12/2023 9/24/2023 Analysis Date WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 14 of 18 ------- EPA Contract No. 68HERH21D0006 Figure 4 Laboratory Control Sample Results for Third Quarter 2023 LCS - Tenon ICP-OES Ca ¦ Mg« NaA K A o © A 6 A a o o a 1 € — 6 6 A t , 8 8 7/2/2023 3 s O j ! 9/24/2023 9/12/2023 8/31/2023 8/19/2023 Analysis Date CASTNET Quality Assurance Report - Third Quarter 2023 (percent recovery) LCS - Tenon IC & AC ~ TS04# TN03# TNH4A. CI O O 9 O ° O <0 0 < ° « o ° S a fi 8 A 8 n A o A —r i ~—f 1 § 9/24/2023 Analysis Date 120 LCS ~ Nylon IC NS04 ~ NHN03 115 110 105 u 100 A A " * ' 1 95 A A A A A 85 80 s j i § 1 Analysis Date 9/24/2023 9/12/2023 LCS Cellulose IC A WS02 115 110 105 £¦ S 100 § 2 95 90 85 80 3 3 "If] i Analysis Date § 9/12/2023 WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 15 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Figure 5 Method Blank Analysis Results for Third Quarter 2023 (total micrograms) 0.16 MB - Teflon ICP-OES Ca ¦ Mg« NaA K ® © © © & © © © (2 a a a 0.14 0.12 o o o o o o o o o c o o o 0.1 | 0.08 i O 0.06 004 0.02 | 7/14/2023 s g § o o c Analysis Date I L MB - Teflon IC & AC ~ TS04# TN03# TNH4A Cl A A A <5 —!— A A A A A A A A © © AO o © © © © © © © O A fftj Q Q o c n O- o Q o o © -O-O-- 2 | j s ; § § se 9/24/2023 MB - Nylon IC ~ NS04 4> NHN03 1 A A A A A A A— *- 0.8 ; 1 0.6 § S 0.4 ! 0.2 — Analysis Dale A WS02 i i 1 1 8/7/2023 1 i 9/24/2023 Analysis Date WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 16 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Figure 6 Laboratory Blank Analysis Results for Third Quarter 2023 0.16 0.14 o o o LB - Teflon ICP-OES Ca ¦ Mg« NaA K ® a o o total micrograms) LB-Teflon IC&AC ~ TS04# TN03# TNH4A Cl OA OA 0 © OA OA OA OA OA OA o o Q o o c Q o Q Q 7/26/2023 7/14/2023 7/2/2023 5 ; § § se 9/24/2023 1.2 LB - Nylon IC L NS04• NHN03 0.8 c 1 0.6 i s 0.4 0.2 0 c 7/14/2023 | j : 5 | | Analysis Date j 1 N A WS02 7/14/2023 i 8/7/2023 1 i 9/24/2023 Analysis Date WSP USA Environment & Infrastructure Inc. - Project No. 6064236203 Page 17 of 18 ------- EPA Contract No. 68HERH21D0006 CASTNET Quality Assurance Report - Third Quarter 2023 Figure 7 Field Blank Analysis Results for Third Quarter 2023 (total micrograms) FB - Teflon ICP-OES Ca ¦ Mg« NaA K o o o FB - Teflon IC & AC A TS04# TN03# TNH4A. CI 0.8 .1 | 0.6 § E s OAA® Ot ©A © 8 0.4 0.2 D —OCX) c oo o 0 j i 1 s u, £ 1 \ w < Analysis Dale i 1.2 FB - Nylon IC A NS04 ~ NHN03 1 & —A— A A A A A 0.8 c 1 0.6 i s 0.4 0.2 0 ? 1 i Analysis Date S» i ' | FB - Cellulose IC A WS02 2.15 2.1 § 2 2.05 § i 2 1.9 ; 7/13/2023 3 1 S2 1 Analysis Date 8/18/2023 j WSP USA Environment & Infrastructure Inc. - Project No, 6064236203 Page 18 of 18 ------- |