NC0026441_Analytical Report 0819-709_20191031

Siler City WWTP
198 Utility Drive
Siler City, NC 27344 RECEIVED
OCT 31 2019
NCDEQ/DWR/NPDES
NC0026441
Siler City, NC
Samples Received: 08/06/2019
Analytical Report
0819-709
Isotope Dilution Method
PFAS — DEQ List
Enthalpy Analytical, LLC — Ultratrace
Lindsay Boone
O. [phone]/ F. 910-212-5866
i..IA LPY Iboone(c enthalpy.corn/www.enthalpy.corn
2714 Exchange Drive, Wilmington, NC 28405

I certify that to the best of my knowledge all analytical data presented in this report:
• Have been checked for completeness
• Are accurate, error-free, and legible
• Have been conducted in accordance with approved protocol, and that all deviations and
analytical problems are summarized in the appropriate narrative(s)
This analytical report was prepared in Portable Document Format (.PDF) and contains 25
pages.
Associate II
iew Performed by: Juanica L. Thomas
09-10-19
Report Issued Date:
EN.,1.,.F- A I.V'
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EU#0819-709 2 of 25

Summary of Results
•
EN 1 11 ALP
EU#08 9 709 3 of 25

TH.ALPY
L
.._. A N L Y T I c A I.,
Summary of Results: PFAS
Enthalpy Ultratrace Batch #
10443
PFAS
Analyte Method Blank Effluent
ng/L ng/L
Acids
PFBA NDU NDU
PFPeA NDU 13.0
PFHxA NDU 5.89 J
PFHpA NDU 0.7171
PFOA ND U 4.02 J
PFNA NDU ND U
PFDA NDU ND U
PFUnA NDU ND U
PFDoA NDU ND U
PFTrA NDU ND U
PFTA NDU ND U
Sulfonates
L-PFBS NDU ND U
PFPeS NDU ND U
PFHxS NDU ND U
PFHpS NDU ND U
PFOS NDU 3.84J
PFNS NDU ND U
PFDS NDU ND U
Other
PFOSA NDU NDU
N-MeFOSAA ND U ND U
N-EtFOSAA ND U ND U
Lab Sample ID MB_10443 0819-709_10443_001
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Detailed
Results
A,
EN
EU#0819-709 5 of 25

EH ' `
_. ANAIYIICAI
Effluent Detailed Results-PFAS
Client Details
Client Sample ID: Effluent Client Name: Siler City
Client Project ID: N/A Sample Collection Date: 06-Aug-19
Lab/Sample Details
Lab Job 6: 0819-709 Matrix: Aqueous Date Received: 06-Aug-19.
Lab Sample ID: 0819-709_10443_001 Wt./Vol. 35.7 Date Extracted: 03-Sep-19
QC Batch St: 10443 Date Analyzed: 04-Sep-19
Final Volume(ml) 0.4 Time Analyzed: 11:55:19
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers
Acids MPFBA _ 89.9
PFBA 375-22-4 ND 1.10 10.1 U M5PFPeA 124
PFPeA 2706-90-3 13.0 0.630 10.1 M3PFBS 121
PFHxA 307-24-4 5.89 1.11 10.1 J M5PFHxA 92.3
PFHpA 375-85-9 0.717 0.487 10.1 J M4PFHpA 96.2
PFOA 335-67-1 4.02 0.557 10.1 1 M3PFHxS 95.5
PFNA 375-95-1 ND 0.357 10.1 U M8PFOA 92.8
PFDA 335-76-2 ND 0.877 10.1 U M9PFNA 81.2
PFUnA 2058-94-8 ND 0.337 10.1 U M8PFOS 83.3
PFDoDA 307-55-1 ND 0.333 10.1 U MBFOSA 82.4
PFTrDA 72629-94-8 ND 0.522 10.1 U M6PFDA 87.3
PFTeDA 376-06-7 ND 0.582 10.1 U d3-N-MeFOSAA 71.3
d5-N-EtFOSAA 89.4
Sulfonates M7PFUdA 82.0
L-PFBS 375-73-5 ND 0.582 10.1 U MPFDoA 61.2
PFPeS 2706-91-4 ND 0.694 10.1 U M2PFTeDA 45.0 Q
PFHxS 355-46-4 ND 0.580 10.1 U
PFHpS 375-92-8 ND 0.546 10.1 U
PFOS 1763-23-1 3.84 0.330 10.1 1
PFNS 68259-12-1 ND 0.459 10.1 U
PFDS 335-77-3 ND 0.947 10.1 U
Other
PFOSA 754-91-6 ND 2.56 10.1 U
N-MeFOSAA 2355-31-9 ND 0.381 10.1 U
N-EtFOSAA 2991-50-6 ND 0.457 10.1 U
EU#0819-709 6 of 25

QC Data
9 7 of 25
EU-
0819-7°
LN:11

Continuing Calibration PFAS
Concentration(ng/L) 901
Standard ID AH36
I Acquisition Date 03-Sep-19
Acquisition Time 20:41:47
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Acids
PFBA 879.2447 -2.4 ±30 Yes
PFPeA 871.9578 -3.2 ±30 Yes
PFHxA 845.7906 -6.1 ±30 Yes
PFHpA 887.7590 -1.5 ±30 Yes
PFOA 916.8137 1.8 ±30 Yes
PFNA 847.2186 -6.0 ±30 Yes
PFDA 895.7780 -0.6 ±30 Yes
PFUnA 859.5914 -4.6 ±30 Yes
PFDoDA 865.4775 -3.9 ±30 Yes
PFTrDA 927.5120 2.9 ±30 Yes
PFTeDA 889.1667 -1.3 ±30 Yes
Sulfonates
L-PFBS 870.0566 9.1 ±30 Yes
PFPeS 706.7216 -16.6 ±30 Yes
PFHxS 796.2560 -3.1 ±30 Yes
PFHpS 836.1744 -2.3 ±30 Yes
PFOS 781.8819 -6.2 ±30 Yes
PFNS 761.0230 -12.0 ±30 Yes
PFDS 778.8848 -10.4 ±30 Yes
Other
PFOSA 871.3513 -3.3 ±30 Yes
N-MeFOSAA 806.9535 -10.4 ±30 Yes
N-EtFOSAA -1.0 892.3253 ±30 Yes
I
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•
Continuing Calibration PFAS
Concentration(ng/L) 5000
Standard ID AH36
Acquisition Date 03-Sep-19
Acquisition Time 20:41:47
Analyte Concentration(ng/g) Recovery(%) Limit(%) Acceptable
MPFBA 5060 101 ±50 Yes
M5PFPeA 5447 109 ±50 Yes
M3PFBS 5067 101 ±50 Yes
M5PFHxA 5090 102 ±50 Yes
M4PFHpA 5278 106 ±50 Yes
M3PFHxS 5030 101 ±50 Yes
M8PFOA 5151 103 ±50 Yes
M9PFNA 5249 105 ±50 Yes
M8PFOS 4977 99.5 ±50 Yes
M8FOSA 5399 108 ±50 Yes
M6PFDA 5000 100 ±50 Yes
d3-N-MeFOSAA 4377 87.5 ±50 Yes
d5-N-EtFOSAA 5796 116 ±50 Yes
M7PFUdA 5268 105 ±50 Yes
MPFDoA 4188 83.8 ±50 Yes
M2PFTeDA 3684 73.7 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 45300 118
M2PFOA 65300 123
MPFDA 47800 130
MPFOS 22300 119
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Continuing Calibration PFAS
Concentration(ng/L) 11510
Standard ID AH33
Acquisition Date 04-Sep-19
Acquisition Time 16:04:30
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Acids
PFBA 12094.7030 5.1 ±30 Yes
PFPeA 11632.8702 1.1 ±30 Yes
PFHxA 12007.7619 4.3 ±30 Yes
P F H pA 11543.2492 0.3 ±30 Yes
PFOA 11569.4568 0.5 ±30 Yes
PFNA 12052.6473 4.7 ±30 Yes
PFDA 11238.3074 -2.4 ±30 Yes
PFUnA 11607.6957 0.8 ±30 Yes
PFDoDA 12204.4147 6.0 ±30 Yes
PFTrDA 11119.4448 -3.4 ±30 Yes
PFTeDA 11383.6270 -1.1 ±30 Yes
Sulfonates
L-PFBS 9831.2803 -3.5 ±30 Yes
PFPeS 11414.1568 5.5 ±30 Yes
1 PFHxS 10648.9753 1.4 ±30 Yes
PFHpS 10634.6186 -2.7 ±30 Yes
PFOS 10224.8768 -4.0 ±30 Yes
PFNS 11040.1072 -0.1 ±30 Yes
P F DS 10437.6063 -6.0 ±30 Yes
Other
PFOSA 11705.0452 1.7 ±30 Yes 1
N-MeFOSAA 12629.4752 9.7 ±30 Yes
N-EtFOSAA 11875.5281 3.2 ±30 Yes
EU#0819-709 10 of 25

Continuing Calibration PFAS
Concentration(ng/L) 5000
Acquisition Date 04-Sep-19
Acquisition Time 16:04:30
Analyte Concentration(ng/g) Recovery(%) Limit(%) Acceptable
MPFBA 5044 101 ±50 Yes
M5PFPeA 5458 109 ±50 Yes
M3PFBS 4979 99.6 ±50 Yes
M5PFHxA 5096 102 ±50 Yes
M4PFHpA 5240 105 ±50 Yes
M3PFHxS 5036 101 ±50 Yes
M8PFOA 5188 104 ±50 Yes
M9PFNA 4936 98.7 ±50 Yes
M8PFOS 5018 100 ±50 Yes
M8FOSA 5219 104 ±50 Yes
M6PFDA 5277 106 ±50 Yes
d3-N-MeFOSAA 4694 93.9 ±50 Yes
d5-N-EtFOSAA 5146 103 ±50 Yes
M7PFUdA 5355 107 ±50 Yes
MPFDoA 4813 96.3 ±50 Yes
M2PFTeDA 4495 89.9 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 45600 118
M2PFOA 62100 117
MPFDA 42100 114
MPFOS 21900 117
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OPR Evaluation
Batch ID#: 10443
Analyte Conc. (ng/g) Recovery(%) Lower Limit Upper Limit Acceptable?
Acids
PFBA 384 89.6% 73 129 Y
PFPeA 411 95.8% 72 129 Y
PFHxA 434 101% 72 129 Y
PFHpA 418 97.6% 72 130 Y
PFOA 431 100% 71 133 Y
PFNA 446 104% 69 130 Y
PFDA 403 94.0% 71 129 Y
PFUnA 411 95.8% 69 133 Y
PFDoDA 421 98.2% 72 134 Y
PFTrDA 398 92.8% 65 144 Y
PFTeDA 400 93.4% 71 132 Y
Sulfonates
L-PFBS 359 94.5% 72 130 Y
PFPeS 437 108% 71 127 Y
PFHxS 409 105% 68 131 Y
PFHpS 459 113% 69 134 Y
PFOS 398 100% 65 140 Y
PFNS 373 90.7% 69 127 Y
PFDS 336 81.3% 53 142 Y
Other
PFOSA 353 82.3% 68 141 Y
N-MeFOSAA 474 111% 65 136 Y
N-EtFOSAA 438 102% 61 135 Y
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f, L THALPY
A t. Y "I' z C..: A. I.
OPR Detailed Results-PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: OPR_10443 Wt./Vol. 30.0 Date Extracted: 03-Sep-19
QC Batch#: 10443 Date Analyzed: 04-Sep-19
Final Volume(mL) 0.4 Time Analyzed: 11:21:46
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries Qualifiers
Acids MPFBA 92.3
PFBA 375-22-4 384 1.31 12.0 M5PFPeA 97.8
PFPeA 2706-90-3 411 0.748 12.0 M3PFBS 90.0
PFHxA 307-24-4 434 1.31 12.0 M5PFHxA 96.6
PFHpA 375-85-9 418 0.579 12.0 M4PFHpA 94.4
PFOA 335-67-1 431 0.662 12.0 M3PFHx5 110
PFNA 375-95-1 446 0.424 12.0 M8PFOA 92.5
PFDA 335-76-2 403 1.04 12.0 M9PFNA 76.7
PFUnA 2058-94-8 411 0.401 12.0 M8PFOS 85.5
PFDoDA 307-55-1 421 0.396 12.0 M8FOSA 81.8
PFTrDA 72629-94-8 398 0.621 12.0 M6PFDA 92.2
PFTeDA 376-06-7 400 0.692 12.0 d3-N-MeFOSAA 75.5
d5-N-EtFOSAA 84.3
Sulfonates M7PFUdA 86.5
L-PFBS 375-73-5 359 0.692 12.0 MPFDoA 73.3
PFPeS 2706-91-4 437 0.825 12.0 M2PFTeDA 19.8 Q
PFHxS 355-46-4 409 0.689 12.0
PFHpS 375-92-8 459 0.649 12.0
PFOS 1763-23-1 398 0.392 12.0
PFNS 68259-12-1 373 0.545 12.0
PFDS 335-77-3 336 1.12 12.0
Other
PFOSA 754-91-6 353 3.04 12.0
N-MeFOSAA 2355-31-9 474 0.453 12.0
N-EtFOSAA 2991-50-6 438 0.543 12.0
EU#0819-709 13 of 25

.... A N A L Y F I C A I.,
1 Method Blank Detailed Results-PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: MB_10443 Wt./Vol. 30.0 Date Extracted: 03-Sep-19
QC Batch U: 10443 Date Analyzed: 04-Sep-19
Final Volume(mL) 0.4 Time Analyzed: 11:10:35
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers
Acids MPFBA 89.1
PFBA 375-22-4 ND 1.31 12.0 U M5PFPeA 97.9
PFPeA 2706-90-3 ND 0.748 12.0 U M3PFBS 79.8
PFHxA 307-24-4 ND 1.31 12.0 U MSPFHxA 91.7
PFHpA 375-85-9 ND 0.579 12.0 U M4PFHpA 95.2
PFOA 335-67-1 ND 0.662 12.0 U M3PFHxS 99.9
PFNA 375-95-1 ND 0.424 12.0 U M8PFOA 89.7
PFDA 335-76-2 ND 1.04 12.0 U M9PFNA 82.2
PFUnA 2058-94-8 ND 0.401 12.0 U M8PFOS 90.1
PFDoDA 307-55-1 ND 0.396 12.0 U M8FOSA 101
PFTrDA 72629-94-8 ND 0.621 12.0 U M6PFDA 86.7
PFTeDA 376-06-7 ND 0.692 12.0 U d3-N-McFOSAA 78.8
d5-N-EtFOSAA 92.2
Sulfonates M7PFUdA 87.2
L-PFBS 375-73-5 ND 0.692 12.0 U MPFDoA 76.9
PFPeS 2706-91-4 ND 0.825 12.0 U M2PFTeDA 60.8
PFHxS 355-46-4 ND 0.689 12.0 U
PFHpS 375-92-8 ND 0.649 12.0 U
PFOS 1763-23-1 ND 0.392 12.0 U
PFNS 68259-12-1 ND 0.545 12.0 U
PFDS 335-77-3 ND 1.12 12.0 U
Other
PFOSA 754-91-6 ND 3.04 12.0 U
N-MeFOSAA 2355-31-9 ND 0.453 12.0 U
N-EtFOSAA 2991-50-6 ND 0.543 12.0 U
EU#0819-709 14 of 25

Narrative Summary
N HALPY
EU#0819-709 15 of 25

Enthalpy Analytical Narrative Summary
Company Siler City WWTP
Job# 0819-709 PFAS - DEQ list
Client Project# n/a
Custody Braidy May of Enthalpy Analytical Wilmington received the sample(s)
(via courier)on 08/06/19 on ice at 8.9°C in good condition.
Prior to, during, and after analysis, the sample(s) was stored in the
laboratory with access only by authorized personnel of Enthalpy
Analytical, LLC.
Analysis The sample(s) was analyzed by isotope dilution method for PFAS using
Waters Acquity UPLC equipped with Xevo TQ MS (LC/MS/MS"Kili").
For aqueous samples, the entire sample (approximately 30mL) was
weighed and spiked with Extraction Standard(ES). The sample was then
mixed well and centrifuged.
Cleanup procedures were performed on the supernatant and then
extracted via SPE. Each final sample extract was transferred to an
autosampler vial and spiked with 400 µL of Injection Standard(IS),prior
to analysis.
Calibration The analytes and labeled standards of interest in the initial calibration
(ICAL) exhibited RSDs less than 50%. All analytes passed the R2
coefficient correlation criteria with the exception of M8FOSA.The Initial
calibration verification (ICY) and continuing calibrations (concals) met
h ±50%the 30/o criteria for native analytes and criteria for ES recoveries.
Y
QC Notes The QC injection met the ±50% criteria for ES recoveries with the
exception of M2PFTeDA, which fell outside the lower limit. The QC
injection met±30% Recovery criteria of target concentration. Due to %
Recovery criteria being met and limited sample available for extraction,
data is reported.
The method blank contained no analytes and met ES recovery criteria.
The samples were initially extracted within the 14-day from collection
holding time (Aug 13), however re-extraction was outside the 14-day
hold time (Sep 3). Data should not be affected by the additional time as
data shows stability for up to 70 days. Extracts were analyzed within the
28-days from extraction to analysis holding time required by the method.
Reporting Notes During the initial analysis, QC parameters for the method blank did not
meet method criteria for several analytes. This required re-extraction of
the batch. This report contains data from the re-extracted sample
indicated by an"R" in the Lab ID.
I T " AL PY EU#0819-709 16 of 25

Enthalpy Analytical Narrative Summary
(continued)
Reporting Notes Some analytes in the samples fell outside the limits for ES recoveries,
(continued) notated with a"Q" qualifier. It is concluded to be due to matrix effects.
Based on the native results in the OPR meeting criteria,the out-of-range
ES recoveries have no impact on the accuracy of the target analyte
(native) compounds. Therefore,the data are considered acceptable.
The results presented in this report are representative of the samples as
provided to the laboratory.
The samples, calibrations and standards for the data presented in this
report were analyzed at 2714 Exchange Drive, Wilmington,NC 28405.
EVE`11
EU#0819-709 17 of 25

General Reporting Notes — Data Qualifiers
f NI'1.1 ALPY
The following are general reporting notes that are applicable to all Enthalpy Analytical, Inc.-Wilmington,
NC data reports, unless specifically noted otherwise.
General Data Qualifiers/Data Attributes
• B—The analyte was found in the method blank,at a concentration that was at least 10%of the
concentration in the sample.
• C—Two or more congeners co-elute. In EDDs,C denotes the lowest IUPAC congener in a co-
elution group and additional co-eluters for the group are shown with the number of the lowest
IUPAC co-eluter.
• E—The reported concentration exceeds the calibration range(upper point of the calibration
curve).
• EMPC—Represents an estimated maximum possible concentration. EMPCs arise in cases where
the signal/noise ratio is not sufficient for peak identification(the determined ion-abundance ratio
is outside the allowed theoretical range), or where there is a co-eluting interference.
• J—Indicates that an analyte has a concentration below the reporting limit(lowest point of the
calibration curve).
• L-Indicates that an analyte has a concentration below the Minimum Detection Limit(MDL).
• ND—Indicates a non-detect.
• NR—Indicates a value that is not reportable.
• PR—Due to interference,the associated congener is poorly resolved.
• DI—Indicates the presence of a quantitative interference.
• SI—Denotes"Single Ion Mode"and is utilized for PCBs where the secondary ion trace has a
significantly elevated noise level due to background PFK. Responses for such peaks are
calculated using an EMPC approach based solely on the primary ion area(s)and may be
considered estimates.
•
U—The analyte was not detected. The Estimated Detection Limit(E
DL)( DL)may be reported for this
analyte.
• V—The labeled standard recovery was found to be outside of the method control limits.
DRBC/TMDL Specific Data Qualifiers/Data Attributes
• J—The reported result is an estimate. The value is less than the minimum calibration level but
greater than the Estimated Detection Limit(EDL).
• U—The analyte was not detected in the sample at the Estimated Detection Limit(EDL).
EU116_v0(General Reporting Notes-Data Qualifiers) Enthalpy Analytical, Inc.—Wilmington,NC
EU#0819-709 18 of 25

0-0
General Reporting Notes — Data Qualifiers
• E—The reported concentration is an estimate. The value exceeds the upper calibration range
(upper point of the calibration curve).
• D—Dilution Data. Result was obtained from the analysis of a dilution.
• B—Analyte found in the sample and associated method blank.
• Cxx—Co-elutes with the indicated congener,data is reported under the lowest IUPAC congener.
`xx' denotes the IUPAC number with the lowest numerical designated congener.
• NR—Analyte is not reportable because of problems in sample preparation or analysis.
• V—Labeled standard recovery is not within method control limits.
• X—Results from re-injection/repeat/second-column analysis.
• EMPC—Estimated Maximum Possible Concentration. Indicates that a peak is identified but did
not meet the method specified ion-abundance ratio.
Lab Identifiers
• AR—Indicates use of the archived portion of the sample extract.
• CU—Indicates a sample that required additional clean-up prior to FIRMS injection/processing.
• D—Indicates a dilution of the sample extract. The number that follows the "D"indicates the
dilution factor.
• DE—Indicates a dilution performed with the addition of ES(Extraction Standard)solution.
• DUP—Designation for a duplicate sample.
• MS—Designation for a matrix spike.
• MSD—Designation for a matrix spike duplicate.
• RJ—Indicates a reinjection of the sample extract.
• S—Indicates a sample split. The number that follows the"S"indicates the split factor.
EU116_v0(General Reporting Notes-Data Qualifiers) Enthalpy Analytical,Inc.—Wilmington,NC
EU#0819-709 19 of 25

Attachment B
To locate a lab capable of performing the PFAS analysis, please visit
https://www.denix.osd.mil/edqw/accreditation/accreditedlabs/and search by method"PFAS by LCMSMS
Compliant with Table B-IS of QSM 5.1 or Latest Version". Grab samples are required to avoid cross-
contamination and ensure consistency.
It,is the Division's understanding that this test method is capable of providing results for the listed PFAS
compounds listed below. The Division recognizes that there may be variations from lab to lab. Each
facility shall provide results for PFOA, PFOS,and shall include as many of the following PFAS
compounds as possible:
Analyte Name Acronym Fluorinated ; Molecular CAS
Carbon Formula Number
Chain
Length
Perfluorotetradecanoic acid PFTeA CI4 Ci,F27COOH 376-06-7
Perfluorotridecanoic acid PFTriA Ci, Ci2F29COOH 72629-94-8
Perfluorododecanoic acid PFDoA C12 C1,F21COOH 307-55-1
Perfluoroundecanoic acid PFUnA CH CwF2,COOH 2058-94-8
ICI Perfluorodecanoic acid PFDA Cm ' C9F19COOH 335-76-2
Perfluorononanoic acid PFNA C, C8F17COOH 375-95-I
Perfluorooctanoic acid PFOA Ca C7Fi5COOH 335-67-1
Perfluorohepanoic acid PFHpA C7 C6F13COOH 375-85-9
Perfluorohexanoic acid PFHxA C, C5F1'COON 307-24-4
Perfluoropentanoic acid PFPeA C, C4F9COOH 2706-90-3
Perfluorobutanoic acid PFBA C4 C3F7COOH 375-22-4
Perfluorodecanesulfonic acid PFDS Co C10F21SO3H 335-77-3
Perfluorononanesulfonic acid PFNS Co C9F19S03H 68259-12-1
Perfluorooctanesulfonic acid PFOS C„ C8F17S03H 1763-23-1
Perfluoroheptanesulfonic acid PFHpS C, C7FisSO3H 375-92-8
Perfluorohexanesulfonic acid PFHxS C6 C6FI3S03H 355-46-4
Perfluoropentanesulfonic acid PFPeS C, C5F>>S03H 2706-91-4
Perfluorobutanesulfonic acid PFBS C4OMG C4F9SO3H 375-73-5
Perfluorooctanesulfonamide PFOSA Cs C8F17S02NH2 754-91-6
2-(N-Ethylperfluorooctanesulfonamido) N-EtFOSAA Cm C8Fi7S02N(C2H5) 2991-50-6
acetic acid CH2COOH
2-(N-Methylperfluorooctanesulfonamido) ! N-MeFOSAA Cs C8Fi7S02N(CH3) 2355-31-9
acetic acid CHCOOH
EU#0819-709 20 of 25

PFAS Compound Acronym List
Acronym I Compound Name
Target Analytes
PFBA Perfluorobutanoic Acid
PFPeA Perfluoropentanoic Acid
PFHxA Perfluorohexanoic Acid
PFHpA Perfluoroheptanoic Acid
PFOA Perfluorooctanoic Acid
PFNA Perfluorononanoic Acid
PFDA Perfluorodecanoic acid
PFUnDA Perfluoroundecanoic acid
PFDoDA(PFTDDA) Perfluorododecanoic acid
PFTrDA(PFTrA) Perfluorotrdecanoic acid
PFTeDA(PFTA) Perfluorotetradecanoic acid
PFBS Perfluorobutane sulfonate
PFPeS Perfluoropentane sulfonate
PFHxS Perfluorohexane sulfonate
PFHpS Perfluoroheptane sulfonate
PFOS Perfluorooctane sulfonate
PFNS Perfluorononane sulfonate
PFDS Perfluorodecane sulfonate
4:2 FTS 4:2 fluorotelomer sulfonic acid
6:2 FTS 6:2 fluorotelomer sulfonic acid
8:2 FTS 8:2 fluorotelomer sulfonic acid
PFOSA Perfluorooctane sulfonamide
N-MeFOSAA N-methyl perfluorooctane sulfonamido acetic acid
N-EtFOSAA N-ethyl perfluorooctane sulfonamido acetic acid
HFPO-DA 2,3,3,3-Tetrafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)-propanoic acid(Gen-X)
Extraction Standards
M3PFBA Perfluoro-n-[2,3,4-13C3]butanoic acid
M5PFPeA Perfluoro-n-[13C5]pentanoic acid
M3PFBS Sodium perfluoro-1-[2,3,4-13C3]-butanesulfonate
M2-4:2 FTS Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-hexane sulfonate
M5PFHxA Perfluoro-n-[1,2,3,4,6-13C5]hexanoic acid
M3HFPO-DA 2,3,3,3-Tetrafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)-13C3-propanoic acid
M4PFHpA Perfluoro-n-[1,2,3,4-13C4]heptanoic acid
M3PFHxS Sodium perfluoro-1-[1,2,3-13C3]-hexanesulfonate
M2-6:2 FTS Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-octane sulfonate
M8PFOA Perfluoro-n-[13C8]octanoic acid
M9PFNA Perfluoro-n-[13C9]nonanoic acid
M8PFOS Sodium perfluoro-1-[13C8]-octanesulfonate
M2-8:2 FTS Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-decane sulfonate
M8FOSA Perfluoro-1-[13C8]octanesulfonamide
M6PFDA Perfluoro-n-[1,2,3,4,5,6-13C6]decanoic acid
d3-N-MeFOSAA N-methyl-d3-perfluoro-1-octanesulfonamide
d5-N-EtFOSAA N-ethyl-d5-perfluoro-1-octanesulfonamide
M7PFUnDA(M7PFUdA) Perfluoro-n-[1,2,3,4,5,6,7-13C7]undecanoic acid
MPFDoA Perfluoro-n-[1,2-13C2]dodecanoic acid
M2PFTeDA Perfluoro-n-[1,2-13C2]tetradecanoic acid
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EU#0819-709 21 of 25

Injection Standards
MPFBA Perfluoro-n-[13C4]butanoic acid
M2PFOA Perfluoro-n-[1,2-13C2]octanoic acid
MPFDA Perfluoro-n-[1,2-13C2]decanoic acid
MPFOS Sodium perfluoro-1-[1,2,3,4-13C4]-octanesulfonate
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EU#0819-709 22 of 25

Sample Custody
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EU#0819-709 23 of 25

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