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DDW-2025-001316
UCMR5Project Name: Page 1 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Attached is the analytical report for the sample(s) received for your project. Below is a list of the individual sample descriptions with the corresponding laboratory number(s). Also, enclosed is a copy of the Chain of Custody document (if received with your sample(s)). Please note any unused portion of the sample(s) may be responsibly discarded after 30 days from the above report date, unless you have requested otherwise. Thank you for the opportunity to serve your analytical needs. If you have any questions or concerns regarding this report please contact our client service department. Sample Identification Lab Sample #Client Sample ID Matrix Date Sampled Date SubmittedBy By WaterC4A2502-01 01/16/24 14:15 Darrin Taylor FED EX01/18/24 12:00WS003 mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 Weber Basin WCD Central Intertie ** This report shows results reprocessed at lower reporting limits (RL) to assist with initial monitoring required by Final PFAS Drinking Water Regulation. ** UCMR5Project Name: Page 2 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Laboratory Reference Number Sample Description 01/16/24 14:15 Sampled Date/Time Received Date/Time 01/18/24 12:00 Matrix WaterWS003 C4A2502-01 ResultAnalyte(s)RDL Analysis DateMethodUnits Analyst Flag Per-/Polyfluorinated Alkyl Substances NDPerfluorobutanoic acid (PFBA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoropentanoic acid (PFPeA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorohexanoic Acid (PFHxA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoroheptanoic Acid (PFHpA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorooctanoic Acid (PFOA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorononanoic Acid (PFNA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorodecanoic Acid (PFDA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoroundecanoic Acid (PFUnA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorododecanoic Acid (PFDoDA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorobutanesulfonic Acid (PFBS) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoropentanesulfonate (PFPeS) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorohexanesulfonic Acid (PFHxS) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoroheptanesulfonic acid (PFHpS) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluorooctanesulfonic Acid (PFOS) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND4:2 Fluorotelomer Sulfonate 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND6:2 Fluorotelomer Sulfonate 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND8:2 Fluorotelomer Sulfonate 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDHexafluoropropylene oxide dimer acid (HFPO-DA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND4,8-dioxa-3H-perfluorononanoic Acid (ADONA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND9-chlorohexadecafluoro-3-oxanon e-1-sulfonic Acid 0.0018 ug/L EPA 533 02/21/24 05:50 AZP ND11-chloroeicosafluoro 3oxaundecane-1-sulfonic Acid 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDNonafluoro-3,6-dioxaheptanoic acid (NFDHA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoro-4-methoxybutanoic acid (PFMBA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 Weber Basin WCD Central Intertie ** This report shows results reprocessed at lower reporting limits (RL) to assist with initial monitoring required by Final PFAS Drinking Water Regulation. ** UCMR5Project Name: Page 3 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Laboratory Reference Number Sample Description 01/16/24 14:15 Sampled Date/Time Received Date/Time 01/18/24 12:00 Matrix WaterWS003 C4A2502-01 ResultAnalyte(s)RDL Analysis DateMethodUnits Analyst Flag Per-/Polyfluorinated Alkyl Substances NDPerfluoro-3-methoxypropanoic acid (PFMPA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP NDPerfluoro(2-ethoxyethane)sulfonic acid (PFEESA) 0.0018 ug/L EPA 533 02/21/24 05:50 AZP Surrogate: 13C4-PFBA EPA 533 02/21/24 05:5091%50-200 AZP Surrogate: 13C5-PFPeA EPA 533 02/21/24 05:5075%50-200 AZP Surrogate: 13C5-PFHxA EPA 533 02/21/24 05:5090%50-200 AZP Surrogate: 13C4-PFHpA EPA 533 02/21/24 05:5088%50-200 AZP Surrogate: 13C8-PFOA EPA 533 02/21/24 05:5085%50-200 AZP Surrogate: 13C9-PFNA EPA 533 02/21/24 05:5085%50-200 AZP Surrogate: 13C6-PFDA EPA 533 02/21/24 05:5082%50-200 AZP Surrogate: 13C7-PFUnA EPA 533 02/21/24 05:5078%50-200 AZP Surrogate: 13C2-PFDoA EPA 533 02/21/24 05:5078%50-200 AZP Surrogate: 13C3-PFBS EPA 533 02/21/24 05:5089%50-200 AZP Surrogate: 13C3-PFHxS EPA 533 02/21/24 05:50102%50-200 AZP Surrogate: 13C8-PFOS EPA 533 02/21/24 05:5087%50-200 AZP Surrogate: 13C2-4:2 FTS EPA 533 02/21/24 05:50141%50-200 AZP Surrogate: 13C2-6:2 FTS EPA 533 02/21/24 05:5087%50-200 AZP Surrogate: 13C2-8:2 FTS EPA 533 02/21/24 05:5079%50-200 AZP Surrogate: 13C3-HFPO-DA EPA 533 02/21/24 05:5089%50-200 AZP Metals and Metalloids 9.0Lithium 9.0 ug/L EPA 200.7 01/26/24 10:36 ALD Perfluorinated Compounds by EPA 537.1 NDN-EtFOSAA 0.0018 ug/L EPA 537 01/24/24 17:01 VPO NDN-MeFOSAA 0.0018 ug/L EPA 537 01/24/24 17:01 VPO NDPerfluorotridecanoic Acid (PFTrDA) 0.0018 ug/L EPA 537 01/24/24 17:01 VPO NDPerfluorotetradecanoic Acid (PFTeDA) 0.0018 ug/L EPA 537 01/24/24 17:01 VPO mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 ** This report shows results reprocessed at lower reporting limits (RL) to assist with initial monitoring required by Final PFAS Drinking Water Regulation. ** Weber Basin WCD Central Intertie UCMR5Project Name: Page 4 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Laboratory Reference Number Sample Description 01/16/24 14:15 Sampled Date/Time Received Date/Time 01/18/24 12:00 Matrix WaterWS003 C4A2502-01 ResultAnalyte(s)RDL Analysis DateMethodUnits Analyst Flag Perfluorinated Compounds by EPA 537.1 Surrogate: 13C2-PFDA EPA 537 01/24/24 17:0190%70-130 VPO Surrogate: 13C2-PFHxA EPA 537 01/24/24 17:0191%70-130 VPO Surrogate: 13C3-HFPO-DA EPA 537 01/24/24 17:0186%70-130 VPO Surrogate: N-EtFOSAA-D5 EPA 537 01/24/24 17:0186%70-130 VPO mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 ** This report shows results reprocessed at lower reporting limits (RL) to assist with initial monitoring required by Final PFAS Drinking Water Regulation. ** Weber Basin WCD Central Intertie UCMR5Project Name: Page 5 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Blank (4B07052-BLK1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluorobutanoic acid (PFBA) ND 0.0020 ug/L Perfluoropentanoic acid (PFPeA) ND 0.0020 ug/L Perfluorohexanoic Acid (PFHxA) ND 0.0020 ug/L Perfluoroheptanoic Acid (PFHpA) ND 0.0020 ug/L Perfluorooctanoic Acid (PFOA) ND 0.0020 ug/L Perfluorononanoic Acid (PFNA) ND 0.0020 ug/L Perfluorodecanoic Acid (PFDA) ND 0.0020 ug/L Perfluoroundecanoic Acid (PFUnA) ND 0.0020 ug/L Perfluorododecanoic Acid (PFDoDA) ND 0.0020 ug/L Perfluorobutanesulfonic Acid (PFBS) ND 0.0020 ug/L Perfluoropentanesulfonate (PFPeS) ND 0.0020 ug/L Perfluorohexanesulfonic Acid (PFHxS) ND 0.0020 ug/L Perfluoroheptanesulfonic acid (PFHpS) ND 0.0020 ug/L Perfluorooctanesulfonic Acid (PFOS) ND 0.0020 ug/L 4:2 Fluorotelomer Sulfonate ND 0.0020 ug/L 6:2 Fluorotelomer Sulfonate ND 0.0020 ug/L 8:2 Fluorotelomer Sulfonate ND 0.0020 ug/L Hexafluoropropylene oxide dimer acid (HFPO-DA) ND 0.0020 ug/L 4,8-dioxa-3H-perfluorononan oic Acid (ADONA) ND 0.0020 ug/L 9-chlorohexadecafluoro-3-ox anone-1-sulfonic Acid ND 0.0020 ug/L Nonafluoro-3,6-dioxaheptano ic acid (NFDHA) ND 0.0020 ug/L 11-chloroeicosafluoro 3oxaundecane-1-sulfonic ND 0.0020 ug/L Perfluoro-4-methoxybutanoic acid (PFMBA) ND 0.0020 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 6 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Blank (4B07052-BLK1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluoro-3-methoxypropanoi c acid (PFMPA) ND 0.0020 ug/L Perfluoro(2-ethoxyethane)sul fonic acid (PFEESA) ND 0.0020 ug/L 0.0200 50-200Surrogate: 13C4-PFBA 930.0186 ug/L 0.0200 50-200Surrogate: 13C5-PFPeA 900.0181 ug/L 0.0200 50-200Surrogate: 13C5-PFHxA 950.0191 ug/L 0.0200 50-200Surrogate: 13C4-PFHpA 940.0187 ug/L 0.0200 50-200Surrogate: 13C8-PFOA 950.0189 ug/L 0.0200 50-200Surrogate: 13C9-PFNA 970.0194 ug/L 0.0200 50-200Surrogate: 13C6-PFDA 980.0197 ug/L 0.0200 50-200Surrogate: 13C7-PFUnA 1010.0203 ug/L 0.0200 50-200Surrogate: 13C2-PFDoA 1020.0203 ug/L 0.0186 50-200Surrogate: 13C3-PFBS 1110.0207 ug/L 0.0189 50-200Surrogate: 13C3-PFHxS 1050.0199 ug/L 0.0191 50-200Surrogate: 13C8-PFOS 1030.0198 ug/L 0.0748 50-200Surrogate: 13C2-4:2 FTS 1110.0831 ug/L 0.0760 50-200Surrogate: 13C2-6:2 FTS 1050.0798 ug/L 0.0768 50-200Surrogate: 13C2-8:2 FTS 1010.0775 ug/L 0.0200 50-200Surrogate: 13C3-HFPO-DA 930.0186 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 7 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE LCS (4B07052-BS1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluorobutanoic acid (PFBA) 0.0021 0.0050 0.00200 50-150106ug/L Perfluoropentanoic acid (PFPeA) 0.0020 0.0030 0.00200 50-150102ug/L Perfluorohexanoic Acid (PFHxA) 0.0020 0.0030 0.00200 50-150100ug/L Perfluoroheptanoic Acid (PFHpA) 0.0021 0.0030 0.00200 50-150105ug/L Perfluorooctanoic Acid (PFOA) 0.0019 0.0040 0.00200 50-15097ug/L Perfluorononanoic Acid (PFNA) 0.0019 0.0040 0.00200 50-15093ug/L Perfluorodecanoic Acid (PFDA) 0.0019 0.0030 0.00200 50-15095ug/L Perfluoroundecanoic Acid (PFUnA) 0.0020 0.0020 0.00200 50-15099ug/L Perfluorododecanoic Acid (PFDoDA) 0.0020 0.0030 0.00200 50-15098ug/L Perfluorobutanesulfonic Acid (PFBS) 0.0020 0.0030 0.00200 50-150100ug/L Perfluoropentanesulfonate (PFPeS) 0.0019 0.0040 0.00200 50-15095ug/L Perfluorohexanesulfonic Acid (PFHxS) 0.0018 0.0030 0.00200 50-15092ug/L Perfluoroheptanesulfonic acid (PFHpS) 0.0017 0.0030 0.00200 50-15085ug/L Perfluorooctanesulfonic Acid (PFOS) 0.0018 0.0040 0.00200 50-15091ug/L 4:2 Fluorotelomer Sulfonate 0.0020 0.0030 0.00200 50-15098ug/L 6:2 Fluorotelomer Sulfonate 0.0022 0.0050 0.00200 50-150111ug/L 8:2 Fluorotelomer Sulfonate 0.0017 0.0050 0.00200 50-15083ug/L Hexafluoropropylene oxide dimer acid (HFPO-DA) 0.0018 0.0050 0.00200 50-15089ug/L 4,8-dioxa-3H-perfluorononan oic Acid (ADONA) 0.0018 0.0030 0.00200 50-15090ug/L 9-chlorohexadecafluoro-3-ox anone-1-sulfonic Acid 0.0020 0.0020 0.00200 50-150101ug/L 11-chloroeicosafluoro 3oxaundecane-1-sulfonic 0.0019 0.0050 0.00200 50-15093ug/L Nonafluoro-3,6-dioxaheptano ic acid (NFDHA) 0.0019 0.020 0.00200 50-15093ug/L Perfluoro-4-methoxybutanoic acid (PFMBA) 0.0020 0.0030 0.00200 50-150101ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 8 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE LCS (4B07052-BS1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluoro-3-methoxypropanoi c acid (PFMPA) 0.0018 0.0040 0.00200 50-15089ug/L Perfluoro(2-ethoxyethane)sul fonic acid (PFEESA) 0.0019 0.0030 0.00200 50-15095ug/L 0.0200 50-200Surrogate: 13C4-PFBA 920.0183 ug/L 0.0200 50-200Surrogate: 13C5-PFPeA 920.0185 ug/L 0.0200 50-200Surrogate: 13C5-PFHxA 960.0191 ug/L 0.0200 50-200Surrogate: 13C4-PFHpA 930.0186 ug/L 0.0200 50-200Surrogate: 13C8-PFOA 960.0191 ug/L 0.0200 50-200Surrogate: 13C9-PFNA 970.0193 ug/L 0.0200 50-200Surrogate: 13C6-PFDA 980.0195 ug/L 0.0200 50-200Surrogate: 13C7-PFUnA 990.0198 ug/L 0.0200 50-200Surrogate: 13C2-PFDoA 990.0198 ug/L 0.0186 50-200Surrogate: 13C3-PFBS 1090.0204 ug/L 0.0189 50-200Surrogate: 13C3-PFHxS 1110.0210 ug/L 0.0191 50-200Surrogate: 13C8-PFOS 1030.0197 ug/L 0.0748 50-200Surrogate: 13C2-4:2 FTS 1090.0816 ug/L 0.0760 50-200Surrogate: 13C2-6:2 FTS 1040.0789 ug/L 0.0768 50-200Surrogate: 13C2-8:2 FTS 980.0755 ug/L 0.0200 50-200Surrogate: 13C3-HFPO-DA 930.0186 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 9 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Matrix Spike (4B07052-MS1)Prepared: 02/08/24 Analyzed: 02/21/24 Source: C4A2699-01 Perfluorobutanoic acid (PFBA) 0.0093 0.0050 0.00926 ND 70-130101ug/L Perfluoropentanoic acid (PFPeA) 0.0097 0.0030 0.00926 ND 70-130104ug/L Perfluorohexanoic Acid (PFHxA) 0.0097 0.0030 0.00926 ND 70-130105ug/L Perfluoroheptanoic Acid (PFHpA) 0.0096 0.0030 0.00926 ND 70-130103ug/L Perfluorooctanoic Acid (PFOA) 0.0097 0.0040 0.00926 ND 70-130104ug/L Perfluorononanoic Acid (PFNA) 0.0095 0.0040 0.00926 ND 70-130103ug/L Perfluorodecanoic Acid (PFDA) 0.0093 0.0030 0.00926 ND 70-130100ug/L Perfluoroundecanoic Acid (PFUnA) 0.0089 0.0020 0.00926 ND 70-13097ug/L Perfluorododecanoic Acid (PFDoDA) 0.0092 0.0030 0.00926 ND 70-130100ug/L Perfluorobutanesulfonic Acid (PFBS) 0.0095 0.0030 0.00926 ND 70-130103ug/L Perfluoropentanesulfonate (PFPeS) 0.0095 0.0040 0.00926 ND 70-130103ug/L Perfluorohexanesulfonic Acid (PFHxS) 0.0092 0.0030 0.00926 ND 70-13099ug/L Perfluoroheptanesulfonic acid (PFHpS) 0.0082 0.0030 0.00926 ND 70-13089ug/L Perfluorooctanesulfonic Acid (PFOS) 0.0098 0.0040 0.00926 ND 70-130106ug/L 4:2 Fluorotelomer Sulfonate 0.0093 0.0030 0.00926 ND 70-130101ug/L 6:2 Fluorotelomer Sulfonate 0.0093 0.0050 0.00926 ND 70-130101ug/L 8:2 Fluorotelomer Sulfonate 0.0090 0.0050 0.00926 ND 70-13097ug/L Hexafluoropropylene oxide dimer acid (HFPO-DA) 0.010 0.0050 0.00926 ND 70-130108ug/L 4,8-dioxa-3H-perfluorononan oic Acid (ADONA) 0.0083 0.0030 0.00926 ND 70-13090ug/L 9-chlorohexadecafluoro-3-ox anone-1-sulfonic Acid 0.0098 0.0020 0.00926 ND 70-130106ug/L 11-chloroeicosafluoro 3oxaundecane-1-sulfonic 0.0085 0.0050 0.00926 ND 70-13091ug/L Nonafluoro-3,6-dioxaheptano ic acid (NFDHA) 0.040 0.020 0.0370 ND 70-130107ug/L Perfluoro-4-methoxybutanoic acid (PFMBA) 0.0097 0.0030 0.00926 ND 70-130105ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 10 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Matrix Spike (4B07052-MS1)Prepared: 02/08/24 Analyzed: 02/21/24 Source: C4A2699-01 Perfluoro-3-methoxypropanoi c acid (PFMPA) 0.0090 0.0040 0.00926 ND 70-13097ug/L Perfluoro(2-ethoxyethane)sul fonic acid (PFEESA) 0.0093 0.0030 0.00926 ND 70-130100ug/L 0.0185 50-200Surrogate: 13C4-PFBA 640.0119 ug/L 0.0185 50-200Surrogate: 13C5-PFPeA 660.0123 ug/L 0.0185 50-200Surrogate: 13C5-PFHxA 710.0131 ug/L 0.0185 50-200Surrogate: 13C4-PFHpA 760.0141 ug/L 0.0185 50-200Surrogate: 13C8-PFOA 760.0141 ug/L 0.0185 50-200Surrogate: 13C9-PFNA 790.0146 ug/L 0.0185 50-200Surrogate: 13C6-PFDA 840.0155 ug/L 0.0185 50-200Surrogate: 13C7-PFUnA 860.0159 ug/L 0.0185 50-200Surrogate: 13C2-PFDoA 880.0163 ug/L 0.0173 50-200Surrogate: 13C3-PFBS 1010.0174 ug/L 0.0175 50-200Surrogate: 13C3-PFHxS 1060.0186 ug/L 0.0177 50-200Surrogate: 13C8-PFOS 970.0172 ug/L 0.0693 50-200Surrogate: 13C2-4:2 FTS 960.0668 ug/L 0.0704 50-200Surrogate: 13C2-6:2 FTS 940.0662 ug/L 0.0711 50-200Surrogate: 13C2-8:2 FTS 910.0645 ug/L 0.0185 50-200Surrogate: 13C3-HFPO-DA 650.0120 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 11 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Matrix Spike Dup (4B07052-MSD1)Prepared: 02/08/24 Analyzed: 02/21/24 Source: C4A2699-01 Perfluorobutanoic acid (PFBA) 0.0097 0.0050 0.00926 ND 3070-130105 4ug/L Perfluoropentanoic acid (PFPeA) 0.0098 0.0030 0.00926 ND 3070-130106 2ug/L Perfluorohexanoic Acid (PFHxA) 0.010 0.0030 0.00926 ND 3070-130108 3ug/L Perfluoroheptanoic Acid (PFHpA) 0.0097 0.0030 0.00926 ND 3070-130105 2ug/L Perfluorooctanoic Acid (PFOA) 0.010 0.0040 0.00926 ND 3070-130110 6ug/L Perfluorononanoic Acid (PFNA) 0.0098 0.0040 0.00926 ND 3070-130106 3ug/L Perfluorodecanoic Acid (PFDA) 0.0098 0.0030 0.00926 ND 3070-130106 6ug/L Perfluoroundecanoic Acid (PFUnA) 0.0099 0.0020 0.00926 ND 3070-130107 10ug/L Perfluorododecanoic Acid (PFDoDA) 0.010 0.0030 0.00926 ND 3070-130110 10ug/L Perfluorobutanesulfonic Acid (PFBS) 0.0099 0.0030 0.00926 ND 3070-130107 4ug/L Perfluoropentanesulfonate (PFPeS) 0.0099 0.0040 0.00926 ND 3070-130106 4ug/L Perfluorohexanesulfonic Acid (PFHxS) 0.0095 0.0030 0.00926 ND 3070-130103 4ug/L Perfluoroheptanesulfonic acid (PFHpS) 0.0091 0.0030 0.00926 ND 3070-13098 10ug/L Perfluorooctanesulfonic Acid (PFOS) 0.010 0.0040 0.00926 ND 3070-130111 4ug/L 4:2 Fluorotelomer Sulfonate 0.0098 0.0030 0.00926 ND 3070-130106 5ug/L 6:2 Fluorotelomer Sulfonate 0.010 0.0050 0.00926 ND 3070-130108 7ug/L 8:2 Fluorotelomer Sulfonate 0.0098 0.0050 0.00926 ND 3070-130106 9ug/L Hexafluoropropylene oxide dimer acid (HFPO-DA) 0.0092 0.0050 0.00926 ND 3070-130100 8ug/L 4,8-dioxa-3H-perfluorononan oic Acid (ADONA) 0.0081 0.0030 0.00926 ND 3070-13088 2ug/L 9-chlorohexadecafluoro-3-ox anone-1-sulfonic Acid 0.010 0.0020 0.00926 ND 3070-130109 3ug/L 11-chloroeicosafluoro 3oxaundecane-1-sulfonic 0.0093 0.0050 0.00926 ND 3070-130100 9ug/L Nonafluoro-3,6-dioxaheptano ic acid (NFDHA) 0.039 0.020 0.0370 ND 3070-130106 1ug/L Perfluoro-4-methoxybutanoic acid (PFMBA) 0.0093 0.0030 0.00926 ND 3070-130101 4ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 12 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Matrix Spike Dup (4B07052-MSD1)Prepared: 02/08/24 Analyzed: 02/21/24 Source: C4A2699-01 Perfluoro-3-methoxypropanoi c acid (PFMPA) 0.0090 0.0040 0.00926 ND 3070-13098 0.8ug/L Perfluoro(2-ethoxyethane)sul fonic acid (PFEESA) 0.0096 0.0030 0.00926 ND 3070-130103 3ug/L 0.0185 50-200Surrogate: 13C4-PFBA 550.0102 ug/L 0.0185 50-200Surrogate: 13C5-PFPeA 590.0109 ug/L 0.0185 50-200Surrogate: 13C5-PFHxA 650.0120 ug/L 0.0185 50-200Surrogate: 13C4-PFHpA 670.0125 ug/L 0.0185 50-200Surrogate: 13C8-PFOA 680.0125 ug/L 0.0185 50-200Surrogate: 13C9-PFNA 720.0133 ug/L 0.0185 50-200Surrogate: 13C6-PFDA 760.0140 ug/L 0.0185 50-200Surrogate: 13C7-PFUnA 770.0142 ug/L 0.0185 50-200Surrogate: 13C2-PFDoA 770.0142 ug/L 0.0173 50-200Surrogate: 13C3-PFBS 930.0161 ug/L 0.0175 50-200Surrogate: 13C3-PFHxS 960.0168 ug/L 0.0177 50-200Surrogate: 13C8-PFOS 890.0157 ug/L 0.0693 50-200Surrogate: 13C2-4:2 FTS 940.0649 ug/L 0.0704 50-200Surrogate: 13C2-6:2 FTS 880.0620 ug/L 0.0711 50-200Surrogate: 13C2-8:2 FTS 830.0592 ug/L 0.0185 50-200Surrogate: 13C3-HFPO-DA 600.0110 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 13 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Reference (4B07052-SRM1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluorobutanoic acid (PFBA) 0.0394 0.0050 0.0400 70-13098ug/L Perfluoropentanoic acid (PFPeA) 0.0404 0.0030 0.0400 70-130101ug/L Perfluorohexanoic Acid (PFHxA) 0.0405 0.0030 0.0400 70-130101ug/L Perfluoroheptanoic Acid (PFHpA) 0.0397 0.0030 0.0400 70-13099ug/L Perfluorooctanoic Acid (PFOA) 0.0407 0.0040 0.0400 70-130102ug/L Perfluorononanoic Acid (PFNA) 0.0391 0.0040 0.0400 70-13098ug/L Perfluorodecanoic Acid (PFDA) 0.0401 0.0030 0.0400 70-130100ug/L Perfluoroundecanoic Acid (PFUnA) 0.0389 0.0020 0.0400 70-13097ug/L Perfluorododecanoic Acid (PFDoDA) 0.0403 0.0030 0.0400 70-130101ug/L Perfluorobutanesulfonic Acid (PFBS) 0.0405 0.0030 0.0400 70-130101ug/L Perfluoropentanesulfonate (PFPeS) 0.0405 0.0040 0.0400 70-130101ug/L Perfluorohexanesulfonic Acid (PFHxS) 0.0406 0.0030 0.0400 70-130102ug/L Perfluoroheptanesulfonic acid (PFHpS) 0.0411 0.0030 0.0400 70-130103ug/L Perfluorooctanesulfonic Acid (PFOS) 0.0404 0.0040 0.0400 70-130101ug/L 4:2 Fluorotelomer Sulfonate 0.0400 0.0030 0.0400 70-130100ug/L 6:2 Fluorotelomer Sulfonate 0.0383 0.0050 0.0400 70-13096ug/L 8:2 Fluorotelomer Sulfonate 0.0397 0.0050 0.0400 70-13099ug/L Hexafluoropropylene oxide dimer acid (HFPO-DA) 0.0407 0.0050 0.0400 70-130102ug/L 4,8-dioxa-3H-perfluorononan oic Acid (ADONA) 0.0385 0.0030 0.0400 70-13096ug/L 9-chlorohexadecafluoro-3-ox anone-1-sulfonic Acid 0.0406 0.0020 0.0400 70-130101ug/L 11-chloroeicosafluoro 3oxaundecane-1-sulfonic 0.0379 0.0050 0.0400 70-13095ug/L Nonafluoro-3,6-dioxaheptano ic acid (NFDHA) 0.0401 0.020 0.0400 70-130100ug/L Perfluoro-4-methoxybutanoic acid (PFMBA) 0.0406 0.0030 0.0400 70-130101ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 14 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Batch 4B07052 - SPE Reference (4B07052-SRM1)Prepared: 02/08/24 Analyzed: 02/21/24 Perfluoro-3-methoxypropanoi c acid (PFMPA) 0.0394 0.0040 0.0400 70-13099ug/L Perfluoro(2-ethoxyethane)sul fonic acid (PFEESA) 0.0397 0.0030 0.0400 70-13099ug/L 0.0200 70-130Surrogate: 13C4-PFBA 980.0196 ug/L 0.0200 70-130Surrogate: 13C5-PFPeA 990.0198 ug/L 0.0200 70-130Surrogate: 13C5-PFHxA 1000.0200 ug/L 0.0200 70-130Surrogate: 13C4-PFHpA 1010.0203 ug/L 0.0200 70-130Surrogate: 13C8-PFOA 1000.0200 ug/L 0.0200 70-130Surrogate: 13C9-PFNA 1010.0201 ug/L 0.0200 70-130Surrogate: 13C6-PFDA 990.0197 ug/L 0.0200 70-130Surrogate: 13C7-PFUnA 1010.0202 ug/L 0.0200 70-130Surrogate: 13C2-PFDoA 1000.0200 ug/L 0.0186 70-130Surrogate: 13C3-PFBS 990.0185 ug/L 0.0189 70-130Surrogate: 13C3-PFHxS 970.0184 ug/L 0.0191 70-130Surrogate: 13C8-PFOS 1010.0193 ug/L 0.0748 70-130Surrogate: 13C2-4:2 FTS 970.0725 ug/L 0.0760 70-130Surrogate: 13C2-6:2 FTS 990.0753 ug/L 0.0768 70-130Surrogate: 13C2-8:2 FTS 970.0745 ug/L 0.0200 70-130Surrogate: 13C3-HFPO-DA 970.0195 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 15 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Per-/Polyfluorinated Alkyl Substances - Batch Quality Control Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Metals and Metalloids - Batch Quality Control Batch 4A25015 - EPA 200.2 Blank (4A25015-BLK1)Prepared: 01/25/24 Analyzed: 01/26/24 Lithium ND 9.0 ug/L LCS (4A25015-BS1)Prepared: 01/25/24 Analyzed: 01/26/24 Lithium 8.76 9.0 9.00 50-15097ug/L Matrix Spike (4A25015-MS1)Prepared: 01/25/24 Analyzed: 01/26/24 Source: C4A2590-05 Lithium 18.9 9.0 9.00 10.0 70-13098ug/L Matrix Spike Dup (4A25015-MSD1)Prepared: 01/25/24 Analyzed: 01/26/24 Source: C4A2590-05 Lithium 19.0 9.0 9.00 10.0 2070-13099 0.5ug/L Reference (4A25015-SRM1)Prepared: 01/25/24 Analyzed: 01/26/24 Lithium 40.7 18 40.0 0-200102ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 16 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Perfluorinated Compounds by EPA 537.1 - Batch Quality Control Batch 4A19050 - SPE Blank (4A19050-BLK1)Prepared: 01/19/24 Analyzed: 01/24/24 N-EtFOSAA ND 0.0020 ug/L N-MeFOSAA ND 0.0020 ug/L Perfluorotridecanoic Acid (PFTrDA) ND 0.0020 ug/L Perfluorotetradecanoic Acid (PFTeDA) ND 0.0020 ug/L 0.0400 70-130Surrogate: 13C2-PFDA 950.0378 ug/L 0.0400 70-130Surrogate: 13C2-PFHxA 820.0329 ug/L 0.0400 70-130Surrogate: 13C3-HFPO-DA 870.0346 ug/L 0.0400 70-130Surrogate: N-EtFOSAA-D5 920.0367 ug/L LCS (4A19050-BS1)Prepared: 01/19/24 Analyzed: 01/28/24 N-EtFOSAA 0.0018 0.0050 0.00200 50-15088ug/L N-MeFOSAA 0.0019 0.0060 0.00200 50-15095ug/L Perfluorotridecanoic Acid (PFTrDA) 0.0014 0.0070 0.00200 50-15071ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.0014 0.0080 0.00200 50-15072ug/L 0.0400 70-130Surrogate: 13C2-PFDA 730.0294 ug/L 0.0400 70-130Surrogate: 13C2-PFHxA 720.0286 ug/L 0.0400 70-130Surrogate: 13C3-HFPO-DA 730.0291 ug/L 0.0400 70-130Surrogate: N-EtFOSAA-D5 810.0323 ug/L Matrix Spike (4A19050-MS1)Prepared: 01/19/24 Analyzed: 01/24/24 Source: C4A2590-05 N-EtFOSAA 0.019 0.0045 0.0180 ND 50-150104ug/L N-MeFOSAA 0.017 0.0054 0.0180 ND 50-15096ug/L Perfluorotridecanoic Acid (PFTrDA) 0.017 0.0063 0.0180 ND 50-15093ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.017 0.0072 0.0180 ND 50-15097ug/L 0.0360 70-130Surrogate: 13C2-PFDA 780.0282 ug/L 0.0360 70-130Surrogate: 13C2-PFHxA 930.0333 ug/L 0.0360 70-130Surrogate: 13C3-HFPO-DA 940.0339 ug/L 0.0360 70-130Surrogate: N-EtFOSAA-D5 740.0267 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 17 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Perfluorinated Compounds by EPA 537.1 - Batch Quality Control Batch 4A19050 - SPE Matrix Spike Dup (4A19050-MSD1)Prepared: 01/19/24 Analyzed: 01/24/24 Source: C4A2590-05 N-EtFOSAA 0.017 0.0045 0.0180 ND 5050-15092 12ug/L N-MeFOSAA 0.016 0.0054 0.0180 ND 5050-15091 6ug/L Perfluorotridecanoic Acid (PFTrDA) 0.016 0.0063 0.0180 ND 5050-15089 4ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.016 0.0072 0.0180 ND 5050-15091 6ug/L 0.0360 70-130Surrogate: 13C2-PFDA 810.0290 ug/L 0.0360 70-130Surrogate: 13C2-PFHxA 830.0300 ug/L 0.0360 70-130Surrogate: 13C3-HFPO-DA 840.0304 ug/L 0.0360 70-130Surrogate: N-EtFOSAA-D5 720.0260 ug/L Reference (4A19050-SRM1)Prepared: 01/19/24 Analyzed: 01/24/24 N-EtFOSAA 0.0234 0.0050 0.0200 70-130117ug/L N-MeFOSAA 0.0241 0.0060 0.0200 70-130121ug/L Perfluorotridecanoic Acid (PFTrDA) 0.0217 0.0070 0.0200 70-130109ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.0250 0.0080 0.0200 70-130125ug/L 0.0400 70-130Surrogate: 13C2-PFDA 970.0389 ug/L 0.0400 70-130Surrogate: 13C2-PFHxA 950.0380 ug/L 0.0400 70-130Surrogate: 13C3-HFPO-DA 990.0398 ug/L 0.0400 70-130Surrogate: N-EtFOSAA-D5 940.0377 ug/L Reference (4A19050-SRM2)Prepared: 01/19/24 Analyzed: 01/27/24 N-EtFOSAA 0.0237 0.0050 0.0200 70-130119ug/L N-MeFOSAA 0.0225 0.0060 0.0200 70-130113ug/L Perfluorotridecanoic Acid (PFTrDA) 0.0199 0.0070 0.0200 70-13099ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.0236 0.0080 0.0200 70-130118ug/L 0.0400 70-130Surrogate: 13C2-PFDA 1110.0442 ug/L 0.0400 70-130Surrogate: 13C2-PFHxA 1120.0449 ug/L 0.0400 70-130Surrogate: 13C3-HFPO-DA 1140.0455 ug/L 0.0400 70-130Surrogate: N-EtFOSAA-D5 1120.0446 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 18 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Result RDL Units Level Spike Result Source %REC %REC Limits RPD RPD Limit Flag Analyte(s) Perfluorinated Compounds by EPA 537.1 - Batch Quality Control Batch 4A19050 - SPE Reference (4A19050-SRM3)Prepared: 01/19/24 Analyzed: 01/28/24 N-EtFOSAA 0.0216 0.0050 0.0200 70-130108ug/L N-MeFOSAA 0.0212 0.0060 0.0200 70-130106ug/L Perfluorotridecanoic Acid (PFTrDA) 0.0197 0.0070 0.0200 70-13098ug/L Perfluorotetradecanoic Acid (PFTeDA) 0.0225 0.0080 0.0200 70-130113ug/L 0.0400 70-130Surrogate: 13C2-PFDA 990.0398 ug/L 0.0400 70-130Surrogate: 13C2-PFHxA 1000.0402 ug/L 0.0400 70-130Surrogate: 13C3-HFPO-DA 990.0395 ug/L 0.0400 70-130Surrogate: N-EtFOSAA-D5 990.0396 ug/L mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704 UCMR5Project Name: Page 19 of 20Analytical Report: Contact: Darrin Taylor Layton City CorporationClient Name: [none]Project Number: Address: Layton, UT 84041 1925 N. Fortlane Report Date: 27-Dec-2024 Work Order Number: 3YesReceived on Ice (Y/N): Temp: °C C4A2502 Notes and Definitions NR: Not Reported ND: Analyte NOT DETECTED at or above the Method Detection Limit (if MDL is reported), otherwise at or above the Reportable Detection Limit (RDL) RDL: Reportable Detection Limit MDL: Method Detection Limit * / (Non-NELAP): NELAP does not offer accreditation for this analyte/method/matrix combination E-STANDARD.RPT This report applies only to the sample(s) analyzed. As a mutual protection to clients, the public, and Babcock Laboratories, Inc., this report is submitted and accepted for the exclusive use of the Client to whom it is addressed. Interpretation and use of the information contained within this report are the sole responsibility of the Client. Babcock Laboratories, Inc. is not responsible for any misinformation or consequences that may result from misinterpretation or improper use of this report. This report is not to be modified or abbreviated in any way. Additionally, this report is not to be used, in whole or in part, in any advertising or publicity matter without written authorization from Babcock Laboratories, Inc. The liability of Babcock Laboratories, Inc. is limited to the actual cost of the requested analyses, unless otherwise agreed upon in writing. There is no other warranty expressed or implied. Enclosed are the analytical results for the submitted sample(s). Babcock Laboratories certify the data presented as part of this report meet the minimum quality standards in the referenced analytical methods. Any exceptions have been noted. Approval cc: Juliett Melissa Machuca For Alexandria L. Guerra mailing P.O. Box 432 Riverside, CA 92502-0432 CA ELAP No. 2698 EPA No. CA00102 NELAP No. OR4035 LACSD No. 10119 P (951) 653-3351 F (951) 653-1662 www.babcocklabs.com location 6100 Quail Valley Court Riverside, CA 92507-0704