NC0026441_Analytical Report 0919-0711_20191031

•
Siler City WWTP
198 Utility Drive
Siler City, NC 27344
Siler City, NC
Samples Received: 09/08/2019
Analytical Report
0919-711 RECEIVED
OCT 31 2019
NCDEQ/DWRJNPDES
Isotope Dilution Method
PFAS — DEQ List
Enthalpy Analytical, LLC — Ultratrace
Air lug • Lindsay Boone
O. [phone]/ F. 910-212-5866
E NT 1-- A P ibooneenthalpy.com/www.enthalpy.com
ANA I.i ,
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 33
pages.
94/
441(
QA Revie /aerformed by: Bryan A. Vi
01 OCT 19
Report Issued Date:
„. TH.. L l
EU#0919-711 Page 2 of 33

Summary of Results
H ALP
EU#0919-711 Page 3 of 33

"410,00' N.ENTH. . PY
...._ ANALYTICAL
Summary of Results: PFAS
Enthalpy Ultratrace Batch #
10463
PFAS
Analyte Method Blank Effluent
ng/L ng/L
Acids
PFBA NDU ND U
PFPeA NDU ND U
PFHxA ND U 6.15
PFHpA ND U 2.05
PFOA ND U 3.71
PFNA NDU ND U
PFDA NDU ND U
PFUnA ND U ND U
PFDoA NDU ND U
PFTrA NDU ND U
PFTA 0.594 J ND U
Sulfonates
L-PFBS NDU ND U
PFPeS NDU • ND U
PFHxS NDU 1.46 J
PFHpS ND U ND U
PFOS ND U 3.89
PFNS NDU ND U
PFDS NDU ND U
Other
PFOSA NDU ND U
N-MeFOSAA ND U ND U
N-EtFOSAA ND U ND U
Lab Sample ID MB_10463 0919-711_10463_OO1R
EU#0919-711 Page 4 of 33

Detailed Results
:.N I HAI PY
EU#0919-711 Page 5 of 33

<R.
001
ENTHALPY.
, AN A I.. Y 1_ ( CAI.
Effluent Detailed Results-PFAS
Client Details
Client Sample ID: Effluent Client Name: Siler City WWTP
Client Project ID: Slier City WWTP Sample Collection Date: 04-Sep-19
Lab/Sample Details
Lab Job it: 0919-711 Matrix: Aqueous Date Received: 04-Sep-19
Lab Sample ID: 0919-711_10463_001R Wt./Vol. 36.0 Date Extracted: 21-Sep-19
QC Batch 8: 10463 Date Analyzed: 24-Sep-19
Final Volume(mL) 0.4 Time Analyzed: 19:12:36
Analyte CAS Number Cont.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers 1
Acids _ MPFBA 90.3 i
PFBA 375-22-4 ND 1.09 1.68 U M5PFPeA 176 Q
PFPeA 2706-90-3 ND 0.623 1.68 U M3PFBS 83.9
PFHxA 307-24-4 6.15 1.09 1.68 M2-4:2 FTS 105
PFHpA 375-85-9 2.05 0.482 1.68 M5PFHxA 66.6
PFOA 335-67-1 3.71 0.551 1.68 M3HFPO-DA 186 Q
PFNA 375-95-1 ND 0.353 1.68 U M4PFHpA 86.8
PFDA 335-76-2 ND 0.868 1.68 U M3PFHxS 94.2
PFUnA 2058-94-8 ND 0.334 1.68 U M2-6:2 FTS 106
PFDoDA 307-55-1 ND 0.330 1.68 U M8PFOA 87.6
PFTrDA 72629-94-8 ND 0.517 1.68 U M9PFNA 83.8
PFTeDA 376-06-7 ND 0.576 1.68 U M8PFOS 88.3
_ M2-8:2 FTS 72.8
Sulfonates M8FOSA 97.3
L-PFBS 375-73-5 ND 0.576 1.68 U M6PFDA 77.9
PFPeS 2706-91-4 ND 0.687 1.68 U d3-N-MeFOSAA 87.5
PFHxS 355-46-4 1.46 0.574 1.68 J d5-N-EtFOSAA 98.9
PFHpS 375-92-8 ND 0.541 1.68 U M7PFUdA 83.9
PFOS 1763-23-1 3.89 0.327 1.68 MPFDoA 73.5
PFNS 68259-12-1 ND 0.454 1.68 U M2PFTeDA 53.6
PFDS 335-77-3 ND 0.937 1.68 U
Other
PFOSA 754-91-6 ND 2.53 2.53 U
N-MeFOSAA 2355-31-9 ND 0.378 1.68 U
N-EtFOSAA 2991-50-6 ND 0.452 1.68 U
EU#0919-711 Page 6 of 33

QCData
•
.
EU#0919-711 Page 7 of 33

Continuing Calibration PFAS
Concentration( g/ )n L 4620
Standard ID AH34
Acquisition Date 24-Sep-19
Acquisition Time 8:21:23
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Acids
PFBA 4704.3710 1.8 ±30 Yes
PFPeA 4720.1666 2.2 ±30 Yes
PFHxA 4647.0094 0.6 ±30 Yes
P F H pA 4767.4752 3.2 ±30 Yes
PFOA 4842.1741 4.8 ±30 Yes
PFNA 4797.0047 3.8 ±30 Yes
PFDA 4787.6756 3.6 ±30 Yes
PFUnA 4868.1359 5.4 ±30 Yes
PFDoDA 5444.0861 17.8 ±30 Yes
PFTrDA 4972.1112 7.6 ±30 Yes
PFTeDA 4597.1396 -0.5 ±30 Yes
Sulfonates
L-PFBS 4305.3123 5.3 ±30 Yes
PFPeS 4544.7478 4.7 ±30 Yes
PFHxS 4258.0047 1.1 ±30 Yes
PFHpS 3989.1186 -9.1 ±30 Yes
PFOS 4058.5655 -5.1 ±30 Yes
PFNS 4549.1120 2.6 ±30 Yes
PFDS 4336.1951 -2.7 ±30 Yes
4:2 FTS 4139.4222 -4.2 ±30 Yes
6:2 FTS 4443.8164 1.2 ±30 Yes
8:2 FTS 4505.6191 1.6 ±30 Yes
Other
PFOSA 4627.2801 0.2 ±30 Yes
N-MeFOSAA 4715.1445 2.1 ±30 Yes
N-EtFOSAA 5358.6825 16.0 ±30 Yes
HFPO-DA(Gen-X) 141193.3441 -12.7 ±30 Yes
EU#0919-711 Page 8 of 33

Continuing Calibration PFAS
Concentration(ng/L) 5000 s
Acquisition Date 24-Sep-19 "' A
Acquisition Time 8:21:23
<
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 5088 102 ±50 Yes
M5PFPeA 5185 104 ±50 Yes
M3PFBS 5316 106 ±50 Yes
M2-4:2 FTS 10167 203 ±50 No
MSPFHxA 5316 106 ±50 Yes
M3HFPO-DA 65541 125 ±50 Yes
M4PFHpA 5746 115 ±50 Yes
M3PFHxS 5223 104 ±50 Yes
M2-6:2 FTS 6649 133 ±50 Yes
M8PFOA 5014 100 ±50 Yes
M9PFNA 5258 105 ±50 Yes
M8PFOS 5183 104 ±50 Yes
M2-8:2 FTS 7654 153 ±50 No
M8FOSA 5313 106 ±50 Yes
M6PFDA 4997 99.9 ±50 Yes
d3-N-MeFOSAA 5862 117 ±50 Yes
d5-N-EtFOSAA 7207 144 ±50 Yes
M7PFUdA 6318 126 ±50 Yes
MPFDoA 4387 87.7 ±50 Yes
M2PFTeDA 2883 57.7 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 45300 97.0
M2PFOA 52400 93.7
M P FDA 42500 110
MPFOS 21000 101
EU#0919-711 Page 9 of 33

Continuing Calibration PFAS
Concentration(ng/L) 1925
Standard ID AH35
Acquisition Date 24-Sep-19
Acquisition Time 12:58:38
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Acids
PFBA 2021.0251 5.0 ±30 Yes
PFPeA 2033.0592 5.6 ±30 Yes
PFHxA 1936.2876 0.6 ±30 Yes
PFHpA 2109.9110 9.6 ±30 Yes
PFOA 1980.9073 2.9 ±30 Yes
PFNA 2060.1147 7.0 ±30 Yes
PFDA 2101.3249 9.2 ±30 Yes
PFUnA 2051.2104 6.6 ±30 Yes
PFDoDA 1868.8464 -2.9 ±30 Yes
PFTrDA 2027.0981 5.3 ±30 Yes
PFTeDA 1802.5266 -6.4 ±30 Yes
Sulfonates
L-PFBS 1735.9013 1.9 ±30 Yes
PFPeS 2060.9672 13.9 ±30 Yes
PFHxS 1741.6526 -0.8 ±30 Yes
PFHpS 1642.0269 -10.2 ±30 Yes
PFOS 1698.4617 -4.7 ±30 Yes
PFNS 1929.1668 4.4 ±30 Yes
PFDS 1662.7943 -10.5 ±30 Yes
4:2 FTS 1833.4259 1.9 ±30 Yes
6:2 FTS 1818.4823 -0.6 ±30 Yes
8:2 FTS 2060.5301 11.5 ±30 Yes
Other
PFOSA 1942.0084 0.9 ±30 Yes
N-MeFOSAA 1884.2721 -2.1 ±30 Yes
N-EtFOSAA 1951.2942 1.4 ±30 Yes
HFPO-DA(Gen-X) 67010.1785 -0.5 ±30 Yes
EU#0919-711 Page 10 of 33

Continuing Calibration PFAS
Concentration(ng/L) 5000 '''''' — - El N ix_ L., t ;
....,
Acquisition Date 24-Sep-19 A
Acquisition Time 12:58:38
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 4885 97.7 ±50 Yes
M5PFPeA 6738 135 ±50 Yes
M3PFBS 4094 81.9 ±50 Yes
M2-4:2 FTS 4246 84.9 ±50 Yes
M5PFHxA 4462 89.2 ±50 Yes
M3HFPO-DA 61508 117 ±50 Yes
M4PFHpA 4782 95.6 ±50 Yes
M3PFHxS 4728 94.6 ±50 Yes
M2-6:2 FTS 4439 88.8 ±50 Yes
M8PFOA 5066 101 ±50 Yes
M9PFNA 5491 110 ±50 Yes
M8PFOS 4924 98.5 ±50 Yes
M2-8:2 FTS 4242 84.8 ±50 Yes
M8FOSA 5813 116 ±50 Yes
M6PFDA 4821 96.4 ±50 Yes
d3-N MeFOSAA 5010 100 ±50 Yes
d5-N-EtFOSAA 5787 116 ±50 Yes
M7PFUdA 5254 105 ±50 Yes
MPFDoA 4913 98.3 ±50 Yes
M2PFTeDA 4374 87.5 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 26200 56.2
M2PFOA 51900 92.9
MPFDA 42900 111
MPFOS 20700 99.3
EU#0919-711 Page 11 of 33

Continuing Calibration PFAS
Concentration(ng/L) 901
Standard ID AH36
Acquisition Date 24-Sep-19
Acquisition Time 18:39:18
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Adds
PFBA 954.3862 5.9 ±30 Yes
PFPeA 963.2494 6.9 ±30 Yes
PFHxA 986.4835 9.5 ±30 Yes
PFHpA 955.8770 6.1 ±30 Yes
PFOA 958.1947 6.3 ±30 Yes
PFNA 959.4512 6.5 ±30 Yes
PFDA 983.4262 9.1 ±30 Yes
PFUnA 967.6638 7.4 ±30 Yes
PFDoDA 923.0174 2.4 ±30 Yes
PFTrDA 916.1026 1.7 ±30 Yes
PFTeDA 800.2108 -11.2 ±30 Yes
Sulfonates
L-PFBS 916.2491 14.9 ±30 Yes
PFPeS 1035.3884 22.3 ±30 Yes
PFHxS 866.8228 5.5 ±30 Yes
PFHpS 811.0588 -5.2 ±30 Yes
PFOS 832.1329 -0.2 ±30 Yes
PFNS 881.7335 1.9 ±30 Yes
PFDS 852.2990 -2.0 ±30 Yes
4:2 FTS 885.5004 5.1 ±30 Yes
6:2 FTS 868.0699 1.4 ±30 Yes
8:2 FTS 918.9691 6.2 ±30 Yes
Other
PFOSA 913.6025 1.4 ±30 Yes
N-MeFOSAA 946.5272 5.1 ±30 Yes
N-EtFOSAA 804.3480 -10.7 ±30 Yes
HFPO-DA(Gen-X) 38016.9955 20.6 ±30 Yes
EU#0919-711 Page 12 of 33

Continuing Calibration PFAS
Concentration(ng/L) 5000
Acquisition Date 24-Sep-19
.o
Acquisition Time 18:39:18
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 5071 101 ±50 Yes
M5PFPeA 5788 116 ±50 Yes
M3PFBS 4499 90.0 ±50 Yes
M2-4:2 FTS 4160 83.2 ±50 Yes
M5PFHxA 4705 94.1 ±50 Yes
M3HFPO-DA 70345 134 ±50 Yes
M4PFHpA 5090 102 ±50 Yes
M3PFHxS 4792 95.8 ±50 Yes
M2-6:2 FTS 4406 88.1 ±50 Yes
M8PFOA 5056 101 ±50 Yes
M9PFNA 5472 109 ±50 Yes
M8PFOS 5074 102 ±50 Yes
M2-8:2 FTS 4309 86.2 ±50 Yes
M8FOSA 5931 119 ±50 Yes
M6PFDA 4989 99.8 ±50 Yes
d3-N-MeFOSAA 4776 95.5 ±50 Yes
d5-N-EtFOSAA 5921 118 ±50 Yes
M7PFUdA 5546 111 ±50 Yes
MPFDoA 5104 102 ±50 Yes
M2PFTeDA 5227 104 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 28400 60.8
M2PFOA 42500 76.1
MPFDA 33600 86.6
M PFOS 17300 82.8
EU#0919-711 Page 13 of 33

•
Continuing Calibration PFAS
Concentration(ng/L) 4620
Standard ID AH34
Acquisition Date 24-Sep-19
Acquisition Time 21:03:55
Analyte Concentration(ng/L) PD(v. ICAL) Limit Acceptable
Acids
PFBA 4952.8315 7.2 ±30 Yes
PFPeA 4838.9379 4.7 ±30 Yes
PFHxA 4558.2911 -1.3 ±30 Yes
PFHpA 4772.2550 3.3 ±30 Yes
PFOA 4626.7902 0.1 ±30 Yes
PFNA 4804.3201 4.0 ±30 Yes
PFDA 4698.1838 1.7 ±30 Yes
PFUnA 4801.1567 3.9 ±30 Yes
PFDoDA 4487.7071 -2.9 ±30 Yes
PFTrDA 4590.6569 -0.6 ±30 Yes
PFTeDA 4113.2046 -11.0 ±30 Yes
Sulfonates
L-PFBS 4131.0103 1.0 ±30 Yes
PFPeS 4379.3037 0.8 ±30 Yes
PFHxS 3993.1493 -5.2 ±30 Yes
PFHpS 3740.1222 -14.8 ±30 Yes
PFOS 4000.6042 -6.4 ±30 Yes
PFNS 4373.0609 -1.4 ±30 Yes
PFDS 4204.7915 -5.7 ±30 Yes
4:2 FTS 4351.7771 0.7 ±30 Yes
6:2 FTS 4460.2458 1.6 ±30 Yes
8:2 FTS 4140.3135 -6.6 ±30 Yes
Other
PFOSA 4698.7525 1.7 ±30 Yes
N-MeFOSAA 4752.7673 2.9 ±30 Yes
N-EtFOSAA 5059.7812 9.5 ±30 Yes
HFPO-DA(Gen-X) 184953.7542 14.4 ±30 Yes
EU#0919-711 Page 14 of 33
I

Continuing Calibration PFAS
Concentration(ng/L) 5000
ti ' IN 1 ti 1.--t, -
Acquisition Date 24-Sep-19 "0
Acquisition Time 21:03:55
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 4973 99.5 ±50 Yes
M5PFPeA 6204 124 ±50 Yes
M3PFBS 3998 80.0 ±50 Yes
M2-4:2 FTS 4878 97.6 ±50 Yes
M5PFHxA 4665 93.3 ±50 Yes
M3HFPO-DA 54460 104 ±50 Yes
M4PFHpA 4829 96.6 ±50 Yes
M3PFHxS 4569 91.4 ±50 Yes
M2-6:2 FTS 4476 89.5 ±50 Yes
M8PFOA 5252 105 ±50 Yes
M9PFNA 5381 108 ±50 Yes
M8PFOS 5046 101 ±50 Yes
M2-8:2 FTS 5295 106 ±50 Yes
M8FOSA 5483 110 ±50 Yes
M6PFDA 5139 103 ±50 Yes
d3-N-McFOSAA 4894 97.9 ±50 Yes
d5-N-EtFOSAA 5504 110 ±50 Yes
M7PFUdA 5633 113 ±50 Yes
MPFDoA 5716 114 ±50 Yes
M2PFTeDA 5800 116 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 20900 44.7
M2PFOA 36300 65.1
MPFDA 29400 75.7
MPFOS 16700 80.1
EU#0919-711 Page 15 of 33

•
Continuing Calibration PFAS
Concentration(ng/L) 901
Standard ID AH36
Acquisition Date 25-Sep-19
Acquisition Time 9:45:21
Analyte Concentration(ng/L) PD(v.ICAL) Limit Acceptable
Adds
PFBA 929.9144 3.2 ±30 Yes
PFPeA 969.5193 7.6 ±30 Yes
PFHxA 969.5879 7.6 ±30 Yes
PFHpA 892.2611 -1.0 ±30 Yes
PFOA 995.1939 10.5 ±30 Yes
PFNA 954.2529 5.9 ±30 Yes
PFDA 1036.4900 15.0 ±30 Yes
P F U nA 1043.0293 15.8 ±30 Yes
PFDoDA 812.9137 -9.8 ±30 Yes
PFTrDA 898.4559 -0.3 ±30 Yes
PFTeDA 780.5030 -13.4 ±30 Yes
Sulfonates
L-PFBS 916.8777 15.0 ±30 Yes
PFPeS 1032.1449 21.9 ±30 Yes
PFHxS 828.6564 0.8 ±30 Yes
PFHpS 754.6174 -11.8 ±30 Yes
PFOS 864.1835 3.6 ±30 Yes
PFNS 972.3493 12.4 ±30 Yes
PFDS 913.9843 5.1 ±30 Yes
4:2 FTS 821.8465 -2.4 ±30 Yes
6:2 FTS 921.8520 7.7 ±30 Yes
8:2 FTS 879.3141 1.7 ±30 Yes
Other
PFOSA 983.3819 9.1 ±30 Yes
N-MeFOSAA 902.9198 0.2 ±30 Yes
N-EtFOSAA 924.0222 2.6 ±30 Yes
HFPO-DA(Gen-X) 55698.4569 76.6 ±30 No
EU#0919-711 Page 16 of 33

Continuing Calibration PFAS
Concentration(ng/L) 5000
4
Acquisition Date 25 Sep 19 .►--1 A N A L Y FILAIA I
Acquisition Time 9:45:21
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 4990 99.8 ±50 Yes
M5PFPeA 6577 132 ±50 Yes
M3PFBS 3703 74.1 ±50 Yes
M2-4:2 FTS 4482 89.6 ±50 Yes
M5PFHxA 4512 90.2 ±50 Yes
M3HFPO-DA 57229 109 ±50 Yes
M4PFHpA 5168 103 ±50 Yes
M3PFHxS 4432 88.6 ±50 Yes
M2-6:2 FTS 3973 79.5 ±50 Yes
M8PFOA 5080 102 ±50 Yes
M9PFNA 5453 109 ±50 Yes
M8PFOS 5034 101 ±50 Yes
M2-8:2 FTS 5391 108 ±50 Yes
M8FOSA 5841 117 ±50 Yes
M6PFDA 4821 96.4 ±50 Yes
d3-N-MeFOSAA 4687 93.7 ±50 Yes
d5-N-EtFOSAA 5736 115 ±50 Yes
M7PFUdA 5610 112 ±50 Yes
MPFDoA 6253 125 ±50 Yes
M2PFTeDA 6773 136 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 13200 28.2
M2PFOA 24700 44.2
J MPFDA 21300 54.8
M P FOS 12300 58.8
EU#0919-711 Page 17 of 33

Continuing Calibration PFAS
Concentration(ng/L) 11510
Standard ID AH33
Acquisition Date 25-Sep-19
Acquisition Time 10:18:46
Analyte Concentration(ng/L) PD(v.ICAL) Limit Acceptable
Acids
PFBA 11469.8360 -0.3 ±30 Yes
PFPeA 11624.5998 1.0 ±30 Yes
PFHxA 11421.0031 -0.8 ±30 Yes
PFHpA 11201.8472 -2.7 ±30 Yes
PFOA 11698.6437 1.6 ±30 Yes _
PFNA 11746.2207 2.1 ±30 Yes
PFDA 11008.0547 -4.4 ±30 Yes
PFUnA 11267.0699 -2.1 ±30 Yes
PFDODA 10743.0124 -6.7 ±30 Yes
PFTrDA 10783.3530 -6.3 ±30 Yes
PFTeDA 10296.1961 -10.5 ±30 Yes
Sulfonates
L-PFBS 10491.0162 3.0 ±30 Yes
PFPeS 10281.5542 -5.0 ±30 Yes
PFHxS 10260.1429 -2.3 ±30 Yes
PFHpS 9653.3586 -11.7 ±30 Yes
PFOS 9632.4618 -9.6 ±30 Yes
PFNS 11629.6423 5.2 ±30 Yes
PFDS 10734.5748 -3.4 ±30 Yes
4:2 FTS 9873.8184 -8.3 ±30 Yes
6:2 FTS 10688.1504 -2.3 ±30 Yes
8:2 FTS 9387.2868 -15.0 ±30 Yes
Other
PFOSA 11112.1845 -3.5 ±30 Yes
N-MeFOSAA 11481.6158 -0.2 ±30 Yes
N-EtFOSAA 11810.7140 2.6 ±30 Yes
1 HFPO-DA(Gen-X) 493559.6501 22.5 ±30 Yes
EU#0919-711 Page 18 of 33

Continuing Calibration PFAS
Concentration(ng/L) 5000 - __.
Acquisition Date 25 Sep 19 °,„. a a — A A. L Y - --�
Acquisition Time 10:18:46
Analyte Concentration(ng/L) Recovery(%) Limit(%) Acceptable
MPFBA 5028 101 ±50 Yes
M5PFPeA 6527 130 ±50 Yes
M3PFBS 3953 79.1 ±50 Yes
M2-4:2 FTS 5786 116 ±50 Yes
M5PFHxA 4640 92.8 ±50 Yes
M3HFPO-DA 46728 89.0 ±50 Yes
M4PFHpA 5094 102 ±50 Yes
M3PFHxS 4550 91.0 ±50 Yes
M2-6:2 FTS 4499 90.0 ±50 Yes
M8PFOA 5162 103 ±50 Yes
M9PFNA 5366 107 ±50 Yes
M8PFOS 5155 103 ±50 Yes
M2-8:2 FTS 5917 118 ±50 Yes
M8FOSA 5589 112 ±50 Yes
M6PFDA 5079 102 ±50 Yes
d3-N-MeFOSAA 5290 106 ±50 Yes
d5-N-EtFOSAA 5570 111 ±50 Yes
M7PFUdA 5317 106 ±50 Yes
M P F DoA 6231 125 ±50 Yes
M2PFTeDA 6594 132 ±50 Yes
Injection Standards Area Recovery(%)
MPFBA 15800 33.8
M2PFOA 26800 47.9
MPFDA 22500 58.0
MPFOS 13700 65.5
EU#0919-711 Page 19 of 33

OPR Evaluation
Batch I D#: 10463
Analyte Conc. (ng/L) Recovery(%) Lower Limit Upper Limit Acceptable?
Acids
PFBA 383 91.9% 73 129 Y
PFPeA 405 97.2% 72 129 Y
PFHxA 415 99.5% 72 129 Y
PFHpA 417 100% 72 130 Y
99.5%PFOA 415 71 0 133 Y
PFNA 389 93.4% 69 130 Y
PFDA 426 102% 71 129 Y
PFUnA 398 95.5% 69 133 Y
PFDoDA 425 102% 72 134 Y
PFTrDA 443 106% 65 144 Y
PFTeDA 402 96.6% 71 132 Y
Sulfonates
L-PFBS 327 88.6% 72 130 Y
PFPeS 405 103% 71 127 Y
PFHxS 338 88.9% 68 131 Y
PFHpS 350 88.4% 69 134 Y
PFOS 350 90.7% 65 140 Y
PFNS 352 88.0% 69 127 Y
PFDS 413 103% 53 142 Y
4:2 FTS 342 87.7% 63 143 Y
1 6:2 FTS 360 91.0% 64 140 Y
8:2 FTS 361 90.3% 67 138 Y
Other
PFOSA 336 80.6% 68 141 Y
N-MeFOSAA 381 91.5% 65 136 Y
N-EtFOSAA 399 95.7% 61 135 Y
HFPO-DA(Gen-X) 15700 107% 70 130 Y
EU#0919-711 Page 20 of 33

_ P Y.
. , N A L YTICAL
OPR Detailed Results-PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: OPR 10463 Wt./Vol. 60 Date Extracted: 21-Sep-19
QC Batch#: 10463 Date Analyzed: 24-Sep-19
Final Volume(mL) 0.4 Time Analyzed: 19:01:31
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RL(ng/L) Qualifiers Standard ES Recoveries Qualifiers
Acids _ MPFBA 94.4
PFBA 375-22-4 383 0.656 1.01 M5PFPeA 132
PFPeA 2706-90-3 405 0.374 1.01 M3PFBS 74.6
PFHxA 307-24-4 415 0.657 1.01 M2-4:2 FTS 169 Q
PFHpA 375-85-9 417 0.290 1.01 M5PFHxA 66.4
PFOA 335-67-1 415 _ 0.331 1.01 M3HFPO-DA 91.8
PFNA 375-95-1 389 0.212 1.01 M4PFHpA 85.2
PFDA 335-76-2 426 0.521 1.01 M3PFHxS 90.2
PFUnA 2058-94-8 398 0.200 1.01 M2-6:2 FTS 164 Q
PFDoDA 307-55-1 425 0.198 1.01 M8PFOA 88.1
PFTeDA 72629-94-8 443 0.310 1.01 M9PFNA 87.7
PFTeDA 376-06-7 402 0.346 1.01 M8PFOS 86.9
M2-8:2 FTS 172 Q
Sulfonates M8FOSA 73.6
L-PFBS 375-73-5 327 0.346 1.01 M6PFDA 85.5
PFPeS 2706-91-4 405 0.412 1.01 d3-N-MeFOSAA 133
PFHxS 355-46-4 338 0.345 1.01 d5-N-EtFOSAA • 103
PFHpS 375-92-8 350 0.325 1.01 M7PFUdA 94.2
PFOS 1763-23-1 350 _ 0.196 1.01 MPFDoA 97.7
PENS 68259-12-1 352 0.272 1.01 M2PFTeDA 100
PFDS 335-77-3 413 0.562 1.01
Other
PFOSA 754-91-6 336 1.52 1.52
N-MeFOSAA 2355-31-9 381 0.227 1.01
N-EtFOSAA 2991-50-6 399 0.271 1.01
EU#0919-711 Page 21 of 33

.; N T H A I,P
._ ANALY C CAL
Method Blank Detailed Results-PFAS
Lab/Sample Details
Matrix: Aqueous Date Received: N/A
Lab Sample ID: M8_10463 Wt./Vol. 60.0 Date Extracted: 21-Sep-19
QC Batch 8: 10463 Date Analyzed: 24-Sep-19
Final Volume(mL) 0.4 Time Analyzed: 18:50:24
Analyte CAS Number Conc.(ng/L) MDL(ng/L) RI(ng/L) Qualifiers Standard ES Recoveries(%) Qualifiers
Acids _ MPFBA 83.3
PFBA 375-22-4 ND 0.656 1.01 U M5PFPeA 140
PFPeA 2706-90-3 ND 0.374 1.01 U M3PFBS 63.2
PFHxA 307-24-4 ND 0.657 1.01 U M2-4:2 FTS 66.7
PFHpA 375-85-9 ND 0.290 1.01 U M5PFHxA 67.4
PFOA 335-67-1 ND 0.331 1.01 U M3HFPO-DA 123
PFNA 375-95-1 ND 0.212 1.01 U M4PFHpA 87.1
PFDA 335-76-2 ND 0.521 1.01 U M3PFHxS 79.5
PFUnA 2058-94-8 ND 0.200 1.01 U M2-6:2 FTS 77.7
PFDoDA 307-55-1 ND 0.198 1.01 U M8PFOA 88.4
PFTrDA 72629-94-8 ND 0.310 1.01 U M9PFNA 96.3
PFTeDA 376-06-7 0.594 0.346 1.01 J M8PFOS 86.8
M2-8:2 FTS 83.0
Sulfonates M8FOSA 90.2
L-PFBS 375-73-5 ND 0.346 1.01 U M6PFDA 84.7
PFPeS 2706-91-4 ND 0.412 1.01 U d3-N-MeFOSAA 77.0
PFHxS 355-46-4 ND 0.345 1.01 U d5-N-EtFOSAA 95.5
PFHpS 375-92-8 ND 0.325 _ 1.01 U M7PFUdA 93.8
PFOS 1763-23-1 ND 0.196 _ 1.01 U MPFDoA 94.8
PFNS 68259-12-1 ND 0.272 1.01 U M2PFTeDA 93.8
PFDS 335-77-3 ND 0.562 1.01 U
Other
PFOSA 754-91-6 ND 1.52 1.52 U
N-MeFOSAA 2355-31-9 ND 0.227 1.01 U
N-EtFOSAA 2991-50-6 ND 0.271 1.01 U
EU#0919-711 Page 22 of 33

Narrative Summary
EU#0919-711 Page 23 of 33

Company Siler City WWTP
Job# 0919-711 PFAS - DEQ list
Client Project# n/a
Custody Hunter Allen of Enthalpy Analytical Wilmington received the sample on
09/08/19 on ice at 2.6°C in good condition and couriered the sample to
Wilmington.
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 20%,with the exception of M8FOSA;however,
all calibration points for this compound back-calculated to within 30%of
nominal, so the data were deemed acceptable. 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. All target
analytes met exhibited acceptable recovery of target concentration.
The samples were initially extracted on 16 SEP 19. The QC samples
associated with that extraction exhibited ES recoveries outside the
acceptance limits, requiring re-extraction and re-analysis of the samples
in the extraction batch. The samples were re-extracted on 21 SEP 19.
The samples were initially extracted within the 14-day from collection
holding time. The re-extraction took place outside the 14-day from
collection holding time. No error is expected to be introduced by the
extraction outside holding time, as there is evidence of stability for up to
70 days in refrigerate samples. Extracts were analyzed within the 28-
days from extraction to analysis holding time required by the method..
EU#0919-711 Page 24 of 33

Reporting Notes 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.
Reporting Notes Based on the native results in the OPR meeting criteria,the out-of-range
(continued) 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.
EU#0919-711 Page 25 of 33

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).
The reported concentration is not recommended for regulatory use as the value may have a S/N
less than 3.
• 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).
EUI 16_v2(General Reporting Notes-Data Qualifiers) Enthalpy Analytical, Inc.—Wilmington,NC
EU#0919-711 Page 26 of 33

• General Reporting Notes — Data Qualifiers
l I i ..I
• U—The analyte was not detected in the sample at the Estimated Detection Limit(EDL).
• 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 HRMS 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_v2(General Reporting Notes-Data Qualifiers) Enthalpy Analytical, Inc. Wilmington,NC
EU#0919-711 Page 27 of 33

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(PFTDoA) Perfluorododecanoic acid
PFTrDA(PFTrA) Perfluorotridecanoic 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)
E tionndards
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-[1,2-13C2J-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-l-octanesulfonamide
d5-N-EtFOSAA N-ethyl-d5-perfluoro-l-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
t EU#0919-711 Page 28 of 33

•
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
3. `_ f EU#0919-711 Page 29 of 33

Attachment B
To locate a lab capable of performing the PFAS analysis, please visit
https://www.denix.osd.mil/edges/accreditation/accreditedlabs/and search by method"PFAS by LCMSMS
Compliant with Table B-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 1
Length
Perfluorotetradecanoic acid PFTeA C.CI4 Ci3F27C0OH 376-06-7
Perfluorotridecanoic acid PFTriA CI, Ci,F,,COOH 72629-94-8
Perfluorododecanoic acid PFDoA Co CnF21COOH 307-55-1
Perfluoroundecanoic acid PFUnA Cii CoFz COON 2058-94-8
Perfluorodecanoic acid PFDA CIO C9F19COOH 335-76-2
Perfluorononanoic acid PFNA C, C8F»COOH 375-95-1
Perfluorooctanoic acid PFOA C, C7F15COOH 335-67-1
Perfluoroheptanoic acid PFHpA C7 C6F13COOH 375-85-9
Perfluorohexanoic acid PFHxA CO C5F11COOH 307-24-4
Perfluoropentanoic acid PFPeA C5 C4F9COOH 2706-90-3
Perfluorobutanoic acid PFBA C4 C3F7COOH 375-22-4
Perfluorodecanesulfonic acid PFDS CO C10F2ISO3H 335-77-3
Perfluorononanesulfonic acid PFNS C, C9Fi9SO3H 68259-12-1
Perfluorooctanesulfonic acid PFOS C, C8F17S03H 1763-23-I
Perfluoroheptanesulfonic acid PFHpS C7 C7F15S03H 375-92-8
Perfluorohexanesulfonic acid PFHxS C6 C6FI3S03H 355-46-4
Perfluoropentanesulfonic acid PFPeS C, C5F11SO3H 2706-91-4
Perfluorobutanesulfonic acid PFBS C40MG C4F9SO3H 375-73-5
Perfluorooctanesulfonamide PFOSA C, C8Fi7SO2NH2 754-91-6
2-(N-Ethylperfluorooctanesulfonamido) N-EtFOSAA C, C8F17S02N(C2H5) 2991-50-6
acetic acid CH2COOH.
2-(N-Methylperfluorooctanesulfonamido) N-MeFOSAA C, C8F17S02N(CH3) 2355-31-9
acetic acid CHCOOH
EU#0919-711 Page 30 of 33

Sample Custody
AL ) r
EU#0919-711 Page 31 of 33

k. P special Handling:
.1-::. - " ` ' Et-Standard Turn Around Time e
Chain of Custody Record • Rush Turn Around Time--Date Needed
_„
� •All Fast TATs Subject to Approval by Enthalpy Analytical Inc.
_.n.* " •All Samples Disposed of After 6 months Unless Otherwise Instructed
ENTHAL
PY Enthalpy Ultratrace Job#: COC Page of Enthalpy AnalyticalWilmington,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 For
more information email Cindy.:ames�lenthalpy.com.
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Client Name: —..S.rfVV L.... T`•i t..,,-$1"` Project Number: PO#: This chain of Custody is applicable to
Non-Air samples. Standard TAT differ
Project Manager: ,,, Site Name .7 't'�Y t , (..., { Telephone#: per analysts and areprovided byrequest.
Report To. ',`��)C-N t ' !c-4 i t Location. i ! ;.,-`r./1:;i i�f >,iY{j4,'4 Email: trh 11 ``;,it-VC,`,f-!,C fq y
Client Special Instructions:
Sample Containers Analyses:
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This Is The Last Page
Of This Report.
EU#0919-711 Page 33 of 33

4. .----:.<k,,,,...,,
c»• er>
y
Wastewater Treatment Plant
198 Utility Dr.
Siler City, NC 27344
919-742-4581
#NC0026441
PERCS RECEIVED
512 N. Salisbury St. OCT 31 2019
Archdale Building, 9th Floor
Raleigh, NC 27604 NCDEQIDWRINPDES
Enclosed are the three months,July, August, and September of PFAS, and 1, 4 Dioxane Testing for the
Siler City Wastewater Treatment Plant. PFAS testing was performed by Enthalpy, and 1, 4 Dioxane
testing was performed by Meritech, Inc. I spoke with Monti Hassan on October 11, 2019 regarding my
error in sampling Effluent stream instead of Influent, and was instructed to send these results.
Thank You,
Bobbie Hill

Enter data ONLY in blue cells!
POTW Name: Siler City Waste Water Treatment Plant NPDES#: I NC0026441 1
Effluent Grab(ng/L)
CAS Number Analyte Name Acronym 7/8/2019 * 8/6/2019 * 9/8/2019 *
r
335-67-1 Perfluorooctanoic acid PFOA 5.49 4.02 J 3.71
1763-23-1 Perfluorooctanesulfonic acid PFOS 5.66 3.84 J 3.89
375-22-4 Perfluorobutanoic acid PFBA ND U ND U ND U
375-73-5 Perfluorobutanesulfonic acid PFBS ND U ND U ND U
335-77-3 Perfluorodecanesulfonic acid PFDS ND U ND U ND , U
335-76-2 Perfluorodecanoic acid PFDA ND U ND U ND U
307-55-1 Perfluorododecanoic acid PFDoA ND U ND U ND U
375-92-8 Perfluoroheptanesulfonic acid PFHpS ND U ND U ND U
375-85-9 Perfluoroheptanoic acid PFHpA 2.1 J 0.717 J 2.05
355-46-4 Perfluorohexanesulfonic acid PFHxS 2 J ND U 1.46 J
307-24-4 Perfluorohexanoic acid PFHxA 9.94 B 5.89 1 6.15
68259-12-1 Perfluorononanesulfonic acid PFNS ND U ND U ND U
375-95-1 Perfluorononanoic acid PFNA ND U ND U ND U
754-91-6 Perfluorooctanesulfonamide PFOSA ND U ND U ND U
2991-50-6 2-(N-Ethylperfluorooctanesulfonamido)acetic acid N-EtFOSAA ND U ND U ND U
2355-31-9 2-(N-Methylperfluorooctanesulfonamido)acetic acid N-MeFOSAA ND U ND U ND U
2706-91-4 Perfluoropentanesulfonic acid PFPeS ND U ND U ND U
2706-90-3 Perfluoropentanoic acid PFPeA 14.5 B 13 ND U
376-06-7 Perfluorotetradecanoic acid PFTeA ND U ND U ND U
72629-94-8 Perfluorotridecanoic acid PFTriA ND U ND U ND U
2058-94-8 Perfluoroundecanoic acid PFUnA ND U ND U ND U
754-91-6 Perfluorooctane sulfonamide PFOSA ND U ND U ND U
2355-31-9 N-methyl perfluorooctane sulfonamido acetic acid N-MeFOSAA ND U ND U _ ND U
2991-50-6 N-ethyl perfluorooctane sulfonamido acetic acid N-EtFOSAA ND U ND U ND U
ENTER OTHER PARAMETERS TESTED
ENTER OTHER PARAMETERS TESTED
Sum of PFOA and PFOS 11.15 7.86 7.6
Total 39.69 27.467 17.26
Influent Grab(ug/L)
7/9/2019 * 8/8/2019 * 9/10/2019 *
1,4-Dioxane I 1.3 _ 1.58 _ <1.0
* Please enter applicable lab qualifiers

1 I
MERITECH, INC. ..
.:. ,
4. ` Environmental Laboratories
011:: '
.201 Laboratory Certification#165
' I
Client: Town of Siler City Merited) ID#: 07091983
Project: 1,4 Dioxane Analysis: 07/11/19
Client Sample ID: Effluent Analyst: VWV
Sample Collection: 07/09/19 Dilution Factor: 1
Report Date: 07/15/19
it
EPA 624.1 VOLATILE ORGANICS
Parameter Result
1,4-Dioxane(p-Dioxane) 1.30 ug/L
Trip Blank < 1.00 ug/L
•
Batch Blank =Below Reporting Limit (Yes)/No
Internal Standards method criteria acceptable (Yes)/No
Surrogate Recoveries Spike Conc Spike Recovery Limits
Toluene-d8 30 ug/L 94% 67-151%
Bromofluorobenzene 30 ug/L 99% 45-161%
* -If "no"is selected, see second page for details.
I hereby certify that I have reviewed and approve these data.
Labor tory Repr ent ive
642 Tamco Road * Reidsville, NC 27320
[phone] * [e-mail]

it
MERITECH, INC.
Environmental Laboratories
Laboratory Certification#165
Client: Town of Siler City WWTP Merited].ID#: 08081981
Project: 1,4-Dioxane Analysis: 08/12/19
Client Sample ID: Effluent Analyst: VWV
Sample Collection: 08/08/19 Dilution Factor: 1
Report Date: 08/16/19
EPA 624.1 VOLATILE ORGANICS
Parameter Result
1,4-Dioxane(p-Dioxane) 1.58 ug/L
Trip Blank < 1.00 ug/L
Batch Blank =Below Reporting Limit (Yes)/No
Internal Standards method criteria acceptable (Yes)/No
Surrogate Recoveries Spike Conc Spike Recovery Limits
Toluene-d8 30 ug/L 101% 67-151%
Bromofluorobenzene 30 ug/L 98% 45-161%
*-If "no" is selected, see second page for details.
1 hereby certify that I have reviewed and approve these data. �=
Labo`•tory ' tive
642 Tamco Road * Reidsville, NC 27320
[phone] * [e-mail]

MERITECH, INC.
Environmental Laboratories
11110 Laboratory Certification#165
Client: Slier City WWTP Meritech ID#: 091019157
Project: 1,4 Dioxane Analysis: 09/12/19
Client Sample ID: Plant Effluent Analyst: VWV
Sample Collection: 09/10/19 Dilution Factor: 1
Report Date: 09/17/19
EPA 624.1 VOLATILE ORGANICS
Parameter Result
1,4-Dioxane(p-Dioxane) <1.00 ug/L
Trip Blank <1.00 ug/L
Batch Blank =Below Reporting Limit (Yes)/No
Internal Standards method criteria acceptable (Yes)/No
Surrogate Recoveries Spike Conc Spike Recovery Limits
Toluene-d8 30 ug/L 108% 67-151%
Bromofluorobenzene 30 ug/L 99% 45-161%
*-If "no"is selected, see second page for details.
I hereby certify that I have reviewed and approve these data.
Lab atory R tative
642 Tamco Road* Reidsville, NC 27320
[phone] * [e-mail]