NC0026441_Analytical Report 0719-708R_20191031

•
Siler City RECEIVED
198 Utility Drive OCT 31 1019
Siler City, NC 27344 NCDEQOWRINPDES
Town of Siler City - WWTP
Siler City, NC
Samples Received: 07/08/2019
Analytical Report
0719-708R
Isotope Dilution Method
PFAS — DEQ List
Enthalpy Analytical, LLC — Ultratrace
Lindsay Boone
0: [phone]/ F: 910-212-5866/ M: 910-544-6077
N 11-1ALPY Iboone(a7enthalpy.com/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: 1
• 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 26
pages.
QA iew Performed by: Juanica L. Thomas
08/09/19
Report Issued Date:
VI FIALPY
EU#0719-708R 2 of 26

Summary of Results
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N I HAI i'Y
EU#0719 708R 3 of 26

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Summary of Results: PFAS
Enthalpy Ultratrace Batch #
10383
PFAS
Analyte Method Blank Effluent
ng/L ng/L
Acids
PFBA NDU ND U
PFPeA 2.21 J 14.5 B
PFHxA 3.39 9.94 B
PFHpA NDU 2.10 J
PFOA NDU 5.49
PFNA NDU ND U
PFDA NDU ND U
PFUnA NDU ND U
PFDSA NDU ND U
PFTrA NDU ND U
PFTA NDU ND U
Sulfonates
L-PFBS NDU ND U
PFPeS NDU ND U
PFHxS NDU 2.00J
PFHpS NDU ND U
PFOS ND U 5.66
PFNS NDU ND U
PFDS NDU ND U
Other
PFOSA NDU ND U
N-MeFOSAA ND U ND U
N-EtFOSAA NDU ND U
Lab Sample ID LMB_10383 0719-708_10383_OO1R
EU#0719-708R 4 of 26

Detailed Results
iALI
EU#0719-708R 5 of 26

N I ii A L I,
\
Effluent Detailed Results- PFAS
Client Details
Client Sample ID: Effluent Client Name: Silter City WWTP
Client Project ID: N/A Sample Collection Date: 08-Jul-19
Lab/Sample Details
Lab Job#: 0719-708 Matrix: Aqueous Date Received: 08-Jul-19
Lab Sample ID: 0719-708_10383_001R Wt./Vol. 35.7 Date Extracted: 24-Jul-19
QC Batch#: 10383 Date Analyzed: 25-Jul-19
Final Volume(mL) 0.4 Time Analyzed: 21:59:09
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers
Acids MPFBA 91.2
PFBA 375-22-4 ND 1.10 2.52 U M5PFPeA 108
PFPeA 2706-90-3 14.5 0.629 2.52 B M3PFBS 128
PFHxA 307-24-4 9.94 1.10 2.52 B M2-4:2 FTS 159 Q
PFHpA 375-85-9 2.10 0.487 2.52 J M5PFHxA 109
PFOA 335-67-1 5.49 0.557 2.52 M3HFPO-DA 139
PFNA 375-95-1 ND 0.357 2.52 U M4PFHpA 108
PFDA 335-76-2 ND 0.876 2.52 U M3PFHxS 121
PFUnA 2058-94-8 ND 0.337 2.52 U M2-6:2 FTS 101
PFDoDA 307-55-1 ND 0.333 2.52 U M8PFOA 86.5
PFTrDA 72629-94-8 ND 0.522 2.52 U M9PFNA 76.8
PFTeDA 376-06-7 ND 0.582 2.52 U M8PFOS 78.6
M2-8:2 FTS 69.7
Sulfonates M8FOSA-1 77.7
L-PFBS 375-73-5 ND 0.582 2.52 U M6PFDA 79.7
PFPeS 2706-91-4 ND 0.694 2.52 U d3-N-MeFOSAA 70.5
PFHxS 355-46-4 2.00 0.580 2.52 J d5-N-EtFOSAA 78.1
PFHpS 375-92-8 ND 0.546 2.52 U M7PFUdA 80.9
PFOS 1763-23-1 5.66 0.330 2.52 MPFDoA 57.6
PFNS 68259-12-1 ND 0.458 2.52 U M2PFTeDA 9.90 Q
PFDS 335-77-3 ND 0.946 2.52 U
Other
PFOSA 754-91-6 ND 2.56 2.56 U
N-MeFOSAA 2355-31-9 ND 0.381 2.52 U
N-EtFOSAA 2991-50-6 ND 0.456 2.52 U
EU#0719-708R 6 of 26

QC Data
1.Hit
EU#0719-708R 7 of 26

Continuing Calibration/Instrument Sensitivity PFAS
Concentration(ng/L) 225
Standard ID AG99
Acquisition Date 25-Jul-19
Acquisition Time 20:41:46
Analyte Concentration(ng/L) %Recovery Limit Acceptable
Acids
PFBA 231 103 ±30 Yes
PFPeA 227 101 ±30 Yes
PFHxA 194 86.3 ±30 Yes
PFHpA 238 106 ±30 Yes
PFOA 225 100 ±30 Yes
PFNA 219 97.1 ±30 Yes
PFDA 207 91.9 ±30 Yes
PFUnA 277 123 ±30 Yes
PFDoDA 241 107 ±30 Yes
PFTrDA 247 110 ±30 Yes
PFTeDA 242 108 ±30 Yes
Sulfonates
L-PFBS 143 71.7 ±30 Yes
PFPeS 187 88.3 ±30 Yes
PFHxS 176 85.7 ±30 Yes
PFHpS 187 87.4 ±30 Yes
PFOS 204 98.0 ±30 Yes
PFNS 254 118 ±30 Yes
PFDS 273 126 ±30 Yes
4:2 FTS 213 101 ±30 Yes
6:2 FTS 216 101 ±30 Yes
8:2 FTS 194 89.7 ±30 Yes
Other
PFOSA 246 109 ±30 Yes
N-MeFOSAA 210 93.2 ±30 Yes
N-EtFOSAA 178 79.2 ±30 Yes
HFPO-DA(Gen-X) 8,157 104 ±30 Yes
EU#0719-708R 8 of 26

Continuing Calibration/Instrument Sensitivity PFAS
Concentration(ng/L) 4480
Standard ID AG99
Acquisition Date 25-Jul-19
Acquisition Time 20:41:46
Analyte Response Midpoint Response Recovery(%) Limit(%) Acceptable
M3PFBA 4952 4890 101 ±50 Yes
M5PFPeA 5086 4650 109 ±50 Yes
M3PFBS 3297 3120 106 ±50 Yes
M2-4:2 FTS 1327 1420 93 ±50 Yes
M5PFHxA 4168 4020 104 ±50 Yes
M3HFPO-DA 2538 2340 108 ±50 Yes
M4PFHpA 4626 4300 108 ±50 Yes
M3PFHxS 4546 4380 104 ±50 Yes
M2-6:2 FTS 1670 1680 99 ±50 Yes
M8PFOA 4452 4350 102 ±50 Yes
M9PFNA 3992 3860 103 ±50 Yes
M8PFOS 4394 4430 99 ±50 Yes
M2-8:2 FTS 2578 2520 102 ±50 Yes
M8FOSA 5034 4790 105 ±50 Yes
M6PFDA 5640 5520 102 ±50 Yes
d3-N-MeFOSAA 7597 7260 105 ±50 Yes
d5-N-EtFOSAA 3322 2640 126 ±50 Yes
M7PFUdA 4981 4450 112 ±50 Yes
MPFDoA 2273 2870 79 ±50 Yes
M2PFTeDA 1689 2650 64 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 34965 98.2
M2PFOA 61215 116
MPFDA 39488 120
MPFOS 22862 121
EU#0719-708R 9 of 26

Continuing Calibration PFAS
Concentration(ng/L) 900
Standard ID AG97
Acquisition Date 25-Jul-19
Acquisition Time 23:27:38
Analyte Concentration(ng/L) %Recovery Limit Acceptable
Acids
PFBA 896.5074 99.6 ±30 Yes
PFPeA 898.4515 99.8 ±30 Yes
PFHxA 897.5691 99.7 ±30 Yes
PFHpA 939.1391 104 ±30 Yes
PFOA 912.1937 101 ±30 Yes
PFNA 901.2807 100 ±30 Yes
PFDA 973.8054 108 ±30 Yes
PFUnA 945.7387 105 ±30 Yes
PFDoDA 979.1828 109 ±30 Yes 1
PFTrDA 1003.2694 112 ±30 Yes
PFTeDA 959.8339 107 ±30 Yes
Sulfonates
L-PFBS 776.8508 97.5 ±30 Yes
PFPeS 881.9399 104 ±30 Yes
PFHxS 802.3878 97.8 ±30 Yes
PFHpS 802.4070 93.8 ±30 Yes
PFOS 781.7763 93.9 ±30 Yes
PFNS 947.6663 110 ±30 Yes
PFDS 931.2146 107 ±30 Yes
4:2 FTS 812.7478 96.6 ±30 Yes
6:2 FTS 861.2302 101 ±30 Yes
8:2FTS 865.8458 100 ±30 Yes
Other
PFOSA 960.2269 107 ±30 Yes
N-MeFOSAA 986.7986 110 ±30 Yes
N-EtFOSAA 859.0977 95.5 ±30 Yes
HFPO-DA(Gen-X) 34453.8589 109 ±30 Yes
EU#0719-708R 10 of 26

Continuing Calibration PFAS
Concentration(ng/L) 4480 1 a '°'
Standard ID AG97
Acquisition Date 25-Jul-19 . . . ANALYTIC A I,.:
Acquisition Time 23:27:38
Analyte Response Midpoint Response Recovery(%) Limit(%) Acceptable
M 3 P F BA 5072 4890 104 ±50 Yes
M5PFPeA 5082 4650 109 ±50 Yes
M3PFBS 2998 3120 96.1 ±50 Yes
M2-4:2 FTS 1228 1420 86.5 ±50 Yes
M5PFHxA 4153 4020 103 ±50 Yes
M3HFPO-DA 2560 2340 109 ±50 Yes
M4PFHpA 4567 4300 106 ±50 Yes
M3PFHxS 4489 4380 102 ±50 Yes
M2-6:2 FTS 1433 1680 85.3 ±50 Yes
M8PFOA 4489 4350 103 ±50 Yes
M9PFNA 4124 3860 107 ±50 Yes
MSPFOS 4500 4430 102 ±50 Yes
M2-8:2 FTS 2493 2520 98.9 ±50 Yes
M8FOSA 4806 4790 100 ±50 Yes
M6PFDA 5156 5520 93.4 ±50 Yes
d3-N-MeFOSAA 7639 7260 105 ±50 Yes
d5-N-EtFOSAA 2701 2640 102 ±50 Yes
M7PFUdA 4736 4450 106 ±50 Yes
MPFDoA 2183 2870 76.1 ±50 Yes
M 2 P FTe DA 1670 2 650 63.0 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 36100 101
M2PFOA 57750 109
M P FDA 44820 136
MPFOS 21543 114
EU#0719-708R 11 of 26

Continuing Calibration PFAS
Concentration(ng/L) 2250
Standard ID AG96
Acquisition Date 26-Jul-19
Acquisition Time 12:36:35
Analyte Concentration(ng/L) %Recovery Limit Acceptable
Acids 1
PFBA 2122.0799 94.3 ±30 Yes
PFPeA 2167.5367 96.3 ±30 Yes
PFHxA 2181.1721 96.9 ±30 Yes
PFHpA 2179.7498 96.9 ±30 Yes
PFOA 2150.1162 95.6 ±30 Yes
PFNA 2177.4948 96.8 ±30 Yes
PFDA 2189.9172 97.3 ±30 Yes
PFUnA 2231.1159 99.2 ±30 Yes
PFDoDA 2264.5019 100.6 ±30 Yes
PFTrDA 2245.5980 99.8 ±30 Yes I
PFTeDA 2172.6277 96.6 ±30 Yes
Sulfonates
L-PFBS 1819.7177 91.4 ±30 Yes
PFPeS 2077.4099 98.2 ±30 Yes
PFHxS 1965.6298 95.8 ±30 Yes
PFHpS 2011.7614 94.1 ±30 Yes
PFOS 1874.0027 90.0 ±30 Yes
PFNS 2117.7033 98.0 ±30 Yes
PFDS 2182.6266 100.5 ±30 Yes
4:2 FTS 2068.8170 98.3 ±30 Yes
6:2 FTS 2064.8789 96.6 ±30 Yes
8:2 FTS 2151.9896 99.6 ±30 Yes
Other
PFOSA 2212.9142 98.4 ±30 Yes
N-MeFOSAA 2264.0105 100.6 ±30 Yes
N-EtFOSAA 2057.9612 91.5 ±30 Yes
HFPO-DA(Gen-X) 76721.4270 97.4 ±30 Yes
EU#0719-708R 12 of 26

J _
Continuing Calibration PFAS
Concentration(ng/L) 4480
AlIP
Acquisition Date 26-Jul-19
Acquisition Time 12:36:35
N A :, T C �
Analyte Response Midpoint Response Recovery(%) Limit(%) Acceptable
M3PFBA 5308 4890 109 ±50 Yes
M5PFPeA 5281 4650 114 ±50 Yes
M3PFBS 3184 3120 102 ±50 Yes
M2 4:2 FTS 1316 1420 93 ±50 Yes
M5PFHxA 4167 4020 104 ±50 Yes
M3HFPO-DA 2551 2340 109 ±50 Yes
M4PFHpA 4525 4300 105 ±50 Yes
M3PFHxS 4407 4380 101 ±50 Yes
M2-6:2 FTS 1641 1680 98 ±50 Yes
M8PFOA 4598 4350 106 ±50 Yes
M9PFNA 4160 3860 108 ±50 Yes
M8PFOS 4558 4430 103 ±50 Yes
M2-8:2 FTS 2599 2520 103 ±50 Yes
M8FOSA 4854 4790 101 ±50 Yes
M6PFDA 5637 5520 102 ±50 Yes
d3-N-MeFOSAA 7597 7260 105 ±50 Yes
d5-N-EtFOSAA 2992 2640 113 ±50 Yes
M7PFUdA 4880 4450 110 ±50 Yes
MPFDoA 2419 2870 84 ±50 Yes
M2PFTeDA 1998 2650 75 ±50 Yes
Injection Standards Area Recovery(%)
M P F BA 35641 105
M2PFOA 57536 109
M P FDA 42186 128
M P FOS 21217 112
EU#0719-708R 13 of 26

Instrument Blank PFAS
Standard ID AH17
Acquisition Date 25-Jul-19
Acquisition Time 20:08:36
Analyte Concentration(ng/L) %of RL Limit Acceptable
Acids
PFBA 0.00 0.0 50 Yes
PFPeA 69.8 31.0 50 Yes
PFHxA 35.9 16.0 50 Yes
PFHpA 0.00 0.0 50 Yes
PFOA 63.7 28.3 50 Yes
PFNA 0.00 0.0 50 Yes
PFDA 0.00 0.0 50 Yes
PFUnA 0.00 0.0 50 Yes
PFDoDA 0.00 0.0 50 Yes
PFTrDA 0.00 0.0 50 Yes
PFTeDA 0.00 0.0 50 Yes
Sulfonates
L-PFBS 102 45.4 50 Yes
PFPeS 0.00 0.0 50 Yes
PFHxS 0.00 0.0 50 Yes
PFHpS 0.00 0.0 50 Yes
PFOS 0.00 0.0 50 Yes
PFNS 0.00 0.0 50 Yes
PFDS 0.00 0.0 50 Yes
4:2 FTS 35.9 16.0 50 Yes
6:2 FTS 0.00 0.0 50 Yes
8:2 FTS 0.00 0.0 50 Yes
Other
PFOSA 0.00 0.0 50 Yes
N-MeFOSAA 0.00 0.0 50 Yes
N-EtFOSAA 0.00 0.0 50 Yes
HFPO-DA(Gen-X) 0.00 0.0 50 Yes
1 i
EU#0719-708R 14 of 26

- : � ,. . IA A L )
mom _� AN A [_ Y T I C A 1.
OPR Detailed Results - PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: OPR 10383 Wt./Vol. 30 Date Extracted: 24-Jul-19
QC Batch U: 10383 Date Analyzed: 25-Jul-19
Final Volume(mL) 0.4 Time Analyzed: 21:03:56
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries Qualifiers
Acids _MPFBA 88.5
PFBA 375-22-4 437 1.31 3.00 M5PFPeA 82.5
PFPeA 2706-90-3 443 0.748 3.00 M3PFBS 87.2
PFHxA 307-24-4 444 1.31 3.00 M2-4:2 FTS 94.1
PFHpA 375-85-9 438 0.579 3.00 M5PFHxA 91.8
PFOA 335-67-1 448 0.662 3.00 M3HFPO-DA 94.3
PFNA 375-95-1 441 0.424 3.00 M4PFHpA 89.2
PFDA 335-76-2 425 1.04 3.00 M3PFHxS 87.6 _
PFUnA 2058-94-8 435 0.401 3.00 M2-6:2 FTS 88.9
PFDoDA 307-55-1 464 0.396 3.00 M8PFOA 84.7
PFTrDA 72629-94-8 526 0.621 3.00 M9PFNA 86.0
PFTeDA 376-06-7 442 0.692 3.00 M8PFOS 82.3
M2-8:2 FTS 77.4
Sulfonates M8FOSA-I 86.3
L-PFBS 375-73-5 375 0.692 3.00 M6PFDA 82.5 _
PFPeS 2706-91-4 386 0.825 3.00 d3-N-MeFOSAA 75.2
PFHxS 355-46-4 401 0.689 3.00 d5-N-EtFOSAA 70.0
PFHpS 375-92-8 474 0.649 3.00 M7PFUdA 79.2
PFOS 1763-23-1 409 0.392 3.00 MPFDoA 77.1
PFNS 68259-12-1 414 0.545 3.00 M2PFTeDA 56.5
PFDS 335-77-3 395 1.12 3.00
Other
PFOSA 754-91-6 434 3.04 3.00
N-MeFOSAA 2355-31-9 453 _ 0.453 3.00 _ _
N-EtFOSAA 2991-50-6 449 0.543 3.00
EU#0719-708R 15 of 26

OPR Evaluation
Batch ID#: 10383
Analyte Conc. (ng/g) Recovery (%) Lower Limit Upper Limit Acceptable?
Acids
PFBA 437 105% 73 129 Y
PFPeA 443 106% 72 129 Y
PFHpA 444 106% 72 129 Y
PFHpA 438 105% 72 130 Y
PFOA 448 107% 71 133 Y
PFNA 441 106% 69 130 _ Y
PFDA 425 102% 71 129 Y
PFUnA 435 104% 69 133 Y
PFDoDA 464 111% 72 134 Y
PFTrDA 526 126% 65 144 Y
PFTeDA 442 106% 71 132 Y
Sulfonates
L-PFBS 375 102% 72 130 Y
PFPeS 386 98.6% 71 127 Y
PFHxS 401 106% 68 131 Y
PFHpS 474 120% 69 134 Y
PFOS 409 106% 65 140 Y
PFNS 414 104% 69 127 Y
PFDS 395 98.1% 53 142 Y
Other
PFOSA 434 104% 68 141 Y
N-MeFOSAA 453 109% 65 136 Y
N-EtFOSAA 449 108% 61 135 Y
EU#0719-708R 16 of 26

- AtNTALPYE
alga !... ANAIYTICAL
Method Blank Detailed Results - PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: LMB_10383 Wt./Vol. 30.0 Date Extracted: 24-Jul-19
QC Batch#: 10383 Date Analyzed: 25-Jul-19
Final Volume(mL) 0.4 Time Analyzed: 21:26:03
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers
Acids MPFBA 97.8
PFBA 375-22-4 ND 1.31 3.00 U M5PFPeA 99.4
PFPeA 2706-90-3 2.21 0.748 3.00 1 M3PFBS 98.6
PFHxA 307-24-4 3.39 1.31 3.00 M2-4:2 FTS 104
PFHpA 375-85-9 ND 0.579 3.00 U MSPFHxA 109
PFOA 335-67-1 ND 0.662 3.00 U M3HFPO-DA 114
PFNA 375-95-1 ND 0.424 3.00 U M4PFHpA 110
PFDA 335-76-2 ND 1.04 3.00 U M3PFHxS 114
PFUnA 2058-94-8 ND 0.401 3.00 U M2-6:2 FTS 102
PFDoDA 307-55-1 ND 0.396 3.00 U M8PFOA 100
PFTrDA 72629-94-8 ND 0.621 3.00 _ U M9PFNA 97.3
PFTeDA 376-06-7 ND 0.692 3.00 U M8PFOS 95.6
M2-8:2 FTS 98.7
Sulfonates M8FOSA-I 92.9
L-PFBS 375-73-5 ND 0.692 3.00 U M6PFDA 98.5 -
PFPeS 2706-91-4 ND 0.825 3.00 U d3-N-MeFOSAA 84.5
PFHxS 355-46-4 ND 0.689 3.00 U d5-N-EtFOSAA 89.8
PFHpS 375-92-8 ND 0.649 3.00 U M7PFUdA 106
PFOS 1763-23-1 ND 0.392 3.00 U MPFDoA 77.7 1
PFNS 68259-12-1 ND 0.545 3.00 U M2PFTeDA 22.4 Q
PFDS 335-77-3 ND 1.12 3.00 U
Other
PFOSA 754-91-6 ND 3.04 3.00 U
N-MeFOSAA 2355-31-9 ND 0.453 3.00 U
N-EtFOSAA 2991-50-6 ND 0.543 3.00 U
EU#0719-708R 17 of 26

Narrative Summary
ENTHALIFY
EU#0719-708R 18 of 26

Enthalpy Analytical Narrative Summary
Company Siler City WWTP
Job# 0719-708 PFAS - DEQ list
Client Project# n/a
Custody Juanica Thomas of Enthalpy Analytical Wilmington received the
sample(s) (via courier) on 07/08/19 on ice at 5.2°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,a 30mL aliquot(or less due to sample amount)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 in the initial calibration (ICAL)
exhibited RSDs less than 50% with the exception of M2PFTeDA. All
analytes passed the R2 coefficient correlation criteria. Per DoD QSM 5.3
Table B-15, the ICAL is acceptable for all analytes since R2 met criteria.
All analytes will be reported. The continuing calibration met the ±30%
criteria for native analytes and±50%criteria for ES recoveries.
QC Notes The QC injection met the ±50% criteria for ES recoveries and ±30%
Recovery of target concentration.
Several analytes were detected above the LOD in the method blank. Any
analytes observed in the sample at more than 10 times the analyte sample
amount in the MB are notated with a"B" qualifier.
The samples were initially extracted within the 14-day from collection
holding time(July 19),however re-extraction was outside the 14-day hold
time(July 24). Extracts were analyzed within the 28-days from extraction
to analysis holding time required by the method.
Reporting Notes This report has been reissued to include dates of initial extraction and
re-extraction and correct erroneous client information.No data was
impacted. This report supersedes the report issued July 27,2019.
During the initial analysis, QC parameters did not meet method criteria
for several analytes. This required re-extraction of the batch. This
•
i° 1 t A L ° ° EU#0719-708R 19 of 26

Enthalpy Analytical Narrative Summary
(continued)
Reporting Notes report contains data from the re-extracted sample indicated by an "R" in
(continued) the Lab ID.
Some analytes in the samples fell outside the limits for ES recoveries,
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.
Analyte peaks PFBA, and PFBS were manually integrated due to not
meeting 10:1 signal to noise criteria. These are reported as "ND".
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.
N I I
EU#0719-708R 20 of 26

General Reporting Notes — Data Qualifiers
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(EDL)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#0719-708R 21 of 26

w
60,
General Reporting Notes — Data Qualifiers
II+I.III, €Ir'
• 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.
EU 1 16 v0(General Reporting Notes-Data Qualifiers) Enthalpy Analytical, Inc.—Wilmington,NC
EU#0719-708R 22 of 26

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 8-15 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 CH Ci,F27C0OH 376-06-7
Perfluorotridecanoic acid PFTriA Ci, Ci2F29COOH 72629-94-8
Perfluorododecanoic acid PFDoA Cl2 CHF2,COOH 307-55-1
Perfluoroundecanoic acid PFUnA Cli C1 F2,COOH 2058-94-8
Perfluorodecanoic acid PFDA Ci„ C9Fi9COOH 335-76-2
Perfluorononanoic acid PFNA C, C8Fi7COOH 375-95-1
Perfluorooctanoic acid PFOA C. C7F15COOH 335-67-1
Perfluoroheptanoic acid PFHpA C7 C6F13COOH 375-85-9
Perfluorohexanoic acid PFHxA C, CSFI ICOOH 307-24-4
Perfluoropentanoic acid PFPeA C, C4F9COOH 2706-90-3
Perfluorobutanoic acid PFBA Ca C3F7COOH 375-22-4
Perfluorodecanesulfonic acid PFDS C CioF21S03H 335-77-3
Perfluorononanesulfonic acid PFNS C, C9F19S03H 68259-12-1
Perfluorooctanesulfonic acid PFOS C. C8Fi7S03H 1763-23-1
Perfluoroheptanesulfonic acid PFHpS C7 C7F15S03H 375-92-8
Perfluoropexanesulfonic acid PFHxS C6 C6F13S03H 355-46-4
Perfluoropentanesulfonic acid PFPeS C, C5F>i SO3H 2706-91-4
Perfluorobctanesulfonic acid PFBS C4OMG C4F9SO3H 375-73-5
Perfluorooctanesulfonamide PFOSA C. C8Fi7S02NH2 754-91-6
2-(N-Ethylperfluorooctanesulfonamido) N-EtFOSAA C. C8F17S02N(C2H5) 2991-50-6
acetic acid CH2COOH
2-(N-Methylperfluorooctanesulfonamido) N-MeFOSAA C. C8Fi7SO2N(CH3) 2355-31-9
acetic acid CHCOOH
EU#0719-708R 23 of 26

SampleCustody
b.&
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EU#0719-708R 24 of 26

0---..11-- ( if1 -- ---4_ 0 B
Special Handling:
Standard Turn Around Time
dP Chain of Custody Record 0 Rush Turn Around Time--Date Needed
•All Fast TATs Subject to Approval by Enthalpy Analytical.Inc
,,,,a___ •All Samples Disposed of After 6 months Unless Otherwise Instructed.
ENTHALPYEnthalpy Ultratrace Job#: COC Page of Enthalpy Analytical-Wilmington,NC has added enhancements to standard methods to improve accuracy
precision and permit an assessment of laboratory performance in the context of your specific data needs.Fe-
w -m more information email [e-mail].
Client Name: J`• c ter` •' " t Lc-;i'f) Project Number: PO#:
'' This Chain of Custody is applicable to
Project Manager: q kl�1 i i�`' -4-i )I Site Name: Telephone# Non-Air samples. Standard TAT differ
per analysis and are provided by request.
Report To. Location. Email (h h t E r. n i ter:,i 'il , c.,'-
Client Special Instructions: Sample Containers Analyses:
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