OHA Drinking Water Services
OR41
PWS ID: 00003 ---- ADAIR VILLAGE WATER SYSTEM
PFAS Sample Results

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Initial Monitoring
EP ID Entry point name Water
type		 Availability Frequency Schedule
begin		 Schedule
end		 First quarter or
First sample		 Second quarter or
Second sample		 Third
quarter		 Fourth
quarter
EP-A EP FOR WILLAMETTE RIVER SW Permanent 4 quarters 1/1/2023 12/31/2023 2/28/2023 5/9/2023 8/23/2023 12/5/2023
For each active entry point served by surface water, collect 4 consecutive quarters of samples within a 12-month period with samples collected 2 to 4 months apart.


Sample Summaries
For compliance? EP ID Entry point name Sample date # Detections # MCL
exceedances		 Sample ID
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 0 0 104158P
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 0 0 107021P
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 0 0 2201066-01
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 0 0 109891P
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 0 0 101641P


Sample Results
For compliance? EP ID
Entry point name Sample date Received date Analyte
code		 Analyte abbreviation
 Analyte name
Result (ng/L)
MCL
(ng/L)		 MRL
(ng/L)		 Sample ID Lab ID Lab name Analysis method Method name TINWSF
ISN		 TSASAMPL
ISN		 TSASAR
ISN		 SelectDataSet SelectAnalyte SelectDetects SelectLabID SelectLabName SelectMethod SelectMethodName
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2813 11Cl-PF3OUdS 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226032 No 2813 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2821 4:2FTS 1H,1H, 2H, 2H-Perfluorohexane sulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225924 No 2821 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2820 6:2FTS 1H,1H, 2H, 2H-Perfluorooctane sulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225942 No 2820 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2822 8:2FTS 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225906 No 2822 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2814 9Cl-PF3ONS 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acd ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226014 No 2814 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2815 ADONA 4,8-Dioxa-3H-perfluorononanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225996 No 2815 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2816 HFPO-DA Hexafluoropropylene oxide dimer acid ND 10 101 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225978 No 2816M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2819 PFBA Perfluorobutanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225960 No 2819 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2801 PFBS Perfluorobutanesulfonic acid ND 40.4 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226212 No 2801M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2807 PFDA Perfluorodecanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226104 No 2807 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2808 PFDoA Perfluorododecanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226086 No 2808 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2826 PFEESA Perfluoro(2-ethoxyethane)sulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225834 No 2826 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2802 PFHpA Perfluoroheptanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226194 No 2802 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2829 PFHpS Perfluoroheptanesulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225798 No 2829 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2809 PFHxA Perfluorohexanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226068 No 2809 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2803 PFHxS Perfluorohexanesulfonic acid ND 10 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226176 No 2803M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2825 PFMBA Perfluoro-4-methoxybutanoic acid ND 20.2 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225852 No 2825 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2823 PFMPA Perfluoro-3-methoxypropanoic acid ND 40.4 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225888 No 2823 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2804 PFNA Perfluorononanoic acid ND 10 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226158 No 2804M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2806 PFOA Perfluorooctanoic acid ND 4.0 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226122 No 2806M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2805 PFOS Perfluorooctanesulfonic acid ND 4.0 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226140 No 2805M N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2824 PFPeA Perfluoropentanoic acid ND 101 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225870 No 2824 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2828 PFPeS Perfluoropentanesulfonic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3225816 No 2828 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
No EP-A EP FOR WILLAMETTE RIVER 01/12/2022 02/18/2022 2812 PFUnA Perfluoroundecanoic acid ND 10.1 2201066-01 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 2438577 3226050 No 2812 N 18 DEQ LABORATORY DIVISION 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2816 HFPO-DA Hexafluoropropylene oxide dimer acid ND 10 1.70 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000280 Yes 2816M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2801 PFBS Perfluorobutanesulfonic acid ND 1.00 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000765 Yes 2801M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2803 PFHxS Perfluorohexanesulfonic acid ND 10 1.00 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000668 Yes 2803M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2804 PFNA Perfluorononanoic acid ND 10 1.30 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000571 Yes 2804M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2806 PFOA Perfluorooctanoic acid ND 4.0 1.30 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000377 Yes 2806M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 02/28/2023 09/04/2025 2805 PFOS Perfluorooctanesulfonic acid ND 4.0 1.30 101641P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021201 4000474 Yes 2805M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2816 HFPO-DA Hexafluoropropylene oxide dimer acid ND 10 1.70 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000278 Yes 2816M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2801 PFBS Perfluorobutanesulfonic acid ND 1.00 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000763 Yes 2801M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2803 PFHxS Perfluorohexanesulfonic acid ND 10 1.00 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000666 Yes 2803M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2804 PFNA Perfluorononanoic acid ND 10 1.30 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000569 Yes 2804M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2806 PFOA Perfluorooctanoic acid ND 4.0 1.30 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000375 Yes 2806M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 05/09/2023 09/04/2025 2805 PFOS Perfluorooctanesulfonic acid ND 4.0 1.30 104158P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021199 4000472 Yes 2805M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2816 HFPO-DA Hexafluoropropylene oxide dimer acid ND 10 1.70 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000279 Yes 2816M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2801 PFBS Perfluorobutanesulfonic acid ND 1.00 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000764 Yes 2801M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2803 PFHxS Perfluorohexanesulfonic acid ND 10 1.00 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000667 Yes 2803M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2804 PFNA Perfluorononanoic acid ND 10 1.30 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000570 Yes 2804M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2806 PFOA Perfluorooctanoic acid ND 4.0 1.30 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000376 Yes 2806M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 08/23/2023 09/04/2025 2805 PFOS Perfluorooctanesulfonic acid ND 4.0 1.30 107021P 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021200 4000473 Yes 2805M N 4047 WECK LABORATORIES, INC. EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2816 HFPO-DA Hexafluoropropylene oxide dimer acid ND 10 1.70 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000243 Yes 2816M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2801 PFBS Perfluorobutanesulfonic acid ND 1.00 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000728 Yes 2801M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2803 PFHxS Perfluorohexanesulfonic acid ND 10 1.00 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000631 Yes 2803M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2804 PFNA Perfluorononanoic acid ND 10 1.30 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000534 Yes 2804M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2806 PFOA Perfluorooctanoic acid ND 4.0 1.30 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000340 Yes 2806M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS
Yes EP-A EP FOR WILLAMETTE RIVER 12/05/2023 09/04/2025 2805 PFOS Perfluorooctanesulfonic acid ND 4.0 1.30 109891P 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS 12237 3021100 4000437 Yes 2805M N 4034 EUROFINS EATON ANALYTICAL EPA 533 PFAS ISOTOPE DILUTION AEX SPE LC/MS/MS