NCG030461_DMR_20201203

.,
Stormwater Discharge Monitoring Report
for North Carolina Division of Energy, Mineral and Land Resources General Permit No. NCG030000
Date submitted December 3,2020
CERTIFICATE OF COVERAGE NO. NCGO3 0 4 6 1 SAMPLE COLLECTION YEAR 2020
FACILITY NAME Core&Main LP/Gem Fabrication SAMPLE PERIOD ®Jan-June D July-Dec
COUNTY Rowan or 0 Monthly1 (month)
PERSON COLLECTING SAMPLES Shannon Lancisi DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Enco Laboratories Lab Cert.# 591 RECEIVED ❑Zero-flow ['Water Supply ESA
Comments on sample collection or analysis: ❑■Other Class C
None DEC 14 2020
CENT PLEASE REMEMBER TO SIGN ON PAGES 2 AND/OR 3 4
CENTRAL FILES
Part A:Stormwater Benchmarks and Monitoring Results DWR SECTION
. No discharge this period?2
Date Sample 24-hour rainfall pH, Non-Polar O&G/ Total Toxic
Outfall No. Collected' amount, Total Suspended Solids Standard units Total Copper Total Lead Total Zinc Total Petroleum Organics
(mo/dd/yr) Inches Hydrocarbons
Benchmarks _ - 100 mg/L or 50 mg/L4 6.0—9.0 0.010 mg/L 0.075 mg/L 0.126 mg/L 15 mg/L 1 mg/L
Parameter Code - 46529 C0530 00400 01119 01051 01094 00552 78141
01 11/12/20 1.01 9.0 6.9 0.0072 0.00107 0.0612 3.29(I) NA
02 11/12/20 1.01 66 6.8 0.0129 0.00293 0.0906 <2.70 NA
1 Monthly sampling(instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit,Section B,Table 1 to identify the especially sensitive receiving water classifications where the more protective benchmark applies.
5 Total Toxic Organics sampling is applicable only for those facilities which perform metal finishing operations, manufacture semiconductors, manufacture
electronic crystals,or manufacture cathode ray tubes. For purposes of this permit the definition of Total Toxic Organics is that definition contained in the EPA
Effluent Guidelines for the facility subject to the requirement to sample(for metal finishing use the definition as found in 40 CFR 433.11;for semiconductor
manufacture use the definition as found in 40 CFR 469.12;for electronic crystal manufacture use the definition as found in 40 CFR 469.22;and for cathode ray
tube manufacture use the definition found in 40 CFR 469.31).
Permit Date:11/1/2018-05/31/2021 SWU-245,last revised 11/1/2018
Page 1 of 3

Facilities that incorporate a solvent management plan into the Stormwater Pollution Prevention Plan may so certify,and the requirement for TTO monitoring
may be waived. The solvent management plan shall include a list of the total toxic organic compounds used and the other elements listed in the General
Permit. For those facilities electing to employ the TTO monitoring waiver,the discharger shall sign the following certification statement:
"Based upon my inquiry of the person or persons directly responsible for managing compliance with the permit monitoring requirement for total toxic organics
(TTO), I certify that to the best of my knowledge and belief,no dumping of concentrated toxic organics into the stormwater or areas which are exposed to rainfall or
stormwater runoff has occurred since filing the last discharge monitoring report. I further certify that this facility is implementing the all the provisions of the
solvent management plan included in the Stormwater Pollution Prevention Plan."
Greg R. Smith
Name(Print name)
General Manager
Title(Print title)
/0 /2- d
Sign ure Date
Note: Results must be reported in numerical format. Do not report Below Detection Limit, BDL,<PQL, Non-detect, ND,or other similar non-numerical
format. When results are below the applicable limits,they must be reported in the format,"<XX mg/L",where XX is the numerical value of the detection
limit, reporting limit,etc. in mg/L.
Note: If you report a sample value in excess of the benchmark,you must implement Tier 1, Tier 2,or Tier 3 responses. See General Permit text.
Part B: Vehicle Maintenance Area Monitoring Results:only for facilities averaging>55 gal of new oil per month.
❑ No discharge this period?'
OutfaII No. Date Sample Collected) 24-hour rainfall amount, New Motor Oil or Non-Polar O&G/Total Total Suspended
(mo/dd/yr) Inches3 Hydraulic Oil Usage Petroleum Hydrocarbons Solids
Benchmarks - - - 15 mg/L 100 mg/L or 50 mg/L°
Parameter Code - 46529 NCOIL 00552 C0530
Footnotes from Part A also apply to Part B
Note: If you report a sample value in excess of the benchmark,you must implement Tier 1, Tier 2,or Tier 3 responses. See General Permit text.
Permit Date: 11/1/2018-05/31/2021 SWU-245,last revised 11/1/2018
Page 2 of 3

FOR PARTA AND PART B MONITORING RESULTS:
• A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES Q NO a
IF YES,HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE? YES®NO a
REGIONAL OFFICE CONTACT NAME:
Mail an original copy of this DMR,including all"No Discharge"reports, within 30 days of receipt of the lab results(or at end of monitorinq period in the
case of"No Discharge"reports)to:
Division of Water Quality
Attn:DWQ Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"I certify,under penalty of law,that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,or
those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete. I
am aware that there are significant penalties for submitting false information,including the possibility of fines and imprisonment for knowing violations."
z-7—z C'
Sign mute Date
Permit Date: 11/1/2018-05/31/2021 SWU-245,last revised 11/1/2018
Page 3 of 3

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APTIM ENVIRONMENTAL E.INFRASTRUCTURE,LLC 10230 STATESVILLE BOULEVARD
SCALE (FEET) 725 U.S.HIGHWAY 301 SOUTH CLEVELAND, ROWAN COUNTY, NORTH CAROLINA
0 75 150 A
TAMPA,FLORIDA 33619 DESIGNED: DRAWN: PROJECT NO.: FIGURE:
[phone] OFFICE
[phone] FAX LH SDJF 631010640 2

esico Laboratories
Accurate. Timely .Responsive. Innovative.
10775 Central Port Drive
Orlando FL,32824
Phone: [phone] FAX: [phone]
Friday, November 20,2020
APTIM Environmental&Infrastructure(CB004)
Attn: Laura Herron
725 U.S. Highway 301 South
Tampa, FL 33619
RE: Laboratory Results for
Project Number: [none], Project Name/Desc:Storm Water Samples
ENCO Workorder(s):AD07224
Dear Laura Herron,
Enclosed is a copy of your laboratory report for test samples received by our laboratory on
Friday, November 13,2020.
Unless otherwise noted in an attached project narrative,all samples were received in
acceptable condition and processed in accordance with the referenced methods/procedures.
Results for these procedures apply only to the samples as submitted.
The analytical results contained in this report are in compliance with NELAC standards,except
as noted in the project narrative if applicable. This report shall not be reproduced except in
full,without the written approval of the Laboratory.
This report contains only those analyses performed by Environmental Conservation
Laboratories. Unless otherwise noted,all analyses were performed at ENCO Orlando. Data
from outside organizations will be reported under separate cover.
If you have any questions or require further information, please do not hesitate to contact me.
Sincerely,
9Wsi la, IA 1011144"0116
Ryya B Kumm
Project Manager
Enclosure(s)
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 1 of 8

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SAMPLE SUMMARY/LABORATORY CHRONICLEII
Client ID: Outfall#02 Lab ID: AD07224-01 Sampled: 11/12/20 10:40 Received: 11/13/20 10:35
PRIAM gC p►eoaratian bold Date/Time(sl preo Date/Time(sl Analysis Date/Time(sl
EPA 1664E EPA 1664E 12/10/20 11/18/20 11:45 11/18/20 16:00
EPA 200.8 EPA 200.8 05/11/21 11/16/20 11:15 11/17/20 15:20
SM 2540D-2011 Same 11/19/20 11/17/20 07:55 11/18/20 09:41
SM 4500H+B-2011 Same 11/12/20 10:54 11/17/20 09:20 11/17/20 09:20
Client ID: Outfall#01 Lab ID: AD07224-02 Sampled: 11/12/20 11:05 Received: 11/13/20 10:35
nummeter PLORRattlea Hold Date/Time(sl preo Date/Time(sl Analysis Date/Tinne sl
EPA 1664E EPA 16646 12/10/20 11/18/20 11:45 11/18/20 16:00
EPA 200.8 EPA 200.8 05/11/21 11/16/20 11:15 11/17/20 15:28
SM 2540D-2011 Same 11/19/20 11/17/20 07:55 11/18/20 09:41
SM 4500H+B-2011 Same 11/12/20 11:19 11/17/20 09:20 11/17/20 09:20
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 2 of 8

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SAMPLE DETECTION SUMMARY
Client ID: Outfall#02 Lab ID: AD07224-01
Anallde Results Haa MQL CQL !!nits Method !Votes
Copper-Total 12.9 0.220 0.500 ug/L EPA 200.8
Lead-Total 2.93 0.160 0.500 ug/L EPA 200.8
pH 6.8 1.0 1.0 pH Units SM 4500H+B-2011 Q-01
Temperature for pH(deg.C) 20 pH Units SM 4500H+B-2011 Q-01
Total Suspended Solids 66 2.5 2.5 mg/L SM 2540D-2011
Zinc-Total 90.6 7.50 20.0 ug/L EPA 200.8
Client ID: Outfall#01 Lab ID: AD07224-02
-
Analldn Beaults Elsa MQL M. link Method Baas
Copper-Total 7.20 0.220 0.500 ug/L EPA 200.8
Lead-Total 1.07 0.160 0.500 ug/L EPA 200.8
Oil&Grease(HEM-SGT)Non-Polar Material 3.29 I 2.70 5.00 mg/L EPA 1664E
pH 6.9 1.0 1.0 pH Units SM 4500H+B-2011 Q-01
Temperature for pH(deg.C) 21 pH Units SM 4500H+B-2011 Q-01
Total Suspended Solids 9.0 2.5 2.5 mg/L SM 2540D-2011 LP-02
Zinc-Total 61.2 7.50 20.0 ug/L EPA 200.8
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full.
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ANALYTICAL RESULTS
Description: Outfall#02 Lab Sample ID:AD07224-01 Received: 11/13/20 10:35
Matrix: Surface Water Sampled:11/12/20 10:40 Work Order:AD07224
Project: Storm Water Samples Sampled By:
Metals by EPA 200 Series Methods
A-ETCO Orlando certified analyte[NELAC E83182)
Analvte fCAS Numbed Results flag !Units RE MU PQL !Ecru! Method Analyzed fix Motes
Copper[7440-50-8]^ 12.9 ug/L 1 0.220 0.500 0K16011 EPA 200.8 11/17/20 15:20 JMA
Lead[7439-92-1]^ 2.93 ug/L 1 0.160 0.500 0K16011 EPA 200.8 11/17/20 15:20 JMA
Zinc[7440-66-6]^ 90.6 ug/L 1 7.50 20.0 0K16011 EPA 200.8 11/17/20 15:20 JMA
Classical Chemistry Parameters
^-ENCO Adando certified analyte[NELAC E83182J 1
Analvte fCAS Numbed Results Elan halts QP MQL PQL Otto Method Analyses Rx !Notes
pH" 6.8 pH Units 1 1.0 1.0 0K16044 3M 4500H+B-2011 11/17/20 09:20 ASR Q-01
Temperature for pH(deg.C) 20 pH Units 1 0K16044 3M 4500H+6-201: 11/17/20 09:20 ASR Q-01
Total Suspended Solids^ 66 mg/L 1 2.5 2.5 0K17001 SM 2540D-2011 11/18/20 09:41 AMP
Classical Chemistry Parameters
l ^-ENCOJactsonville certified analyte[NELAC E82277]
Analvte fCAS Number! Results Flag Units RE NRL £QL !latch Method Analyzed liy Metes
Oil&Grease(HEM-SGT)Non-Polar 2.70 U mg/L 1 2.70 5.00 0K18002 EPA 1664B 11/18/20 16:00 LTS
Material^
Description: Outfall#01 Lab Sample ID:AD07224-02 Received: 11/13/20 10:35
Matrix: Surface Water Sampled:11/12/20 11:05 Work Order:AD07224
Project: Storm Water Samples Sampled By:
Metals by EPA 200 Series Methods
A-&'COOrlanao certified analyte[NELAC E83182] 1
Armlike ['CAS Numberl Results Elea Units RE MQL PQL 5atSh Method Analyzed Br Hetes
Copper[7440-50-8]^ 7.20 ug/L 1 0.220 0.500 0K16011 EPA 200.8 11/17/20 15:28 JMA
Lead[7439-92-1]^ 1.07 ug/L 1 0.160 0.500 0K16011 EPA 200.8 11/17/20 15:28 JMA
Zinc[7440-66-6]^ 61.2 ug/L 1 7.50 20.0 0K16011 EPA 200.8 11/17/20 15:28 JMA
Classical Chemistry Parameters
A-E7NCOOrlando certified analyte[NELAC E83182) 1
Analvte fCAS Number! Results Elan units DE NQL PQL Retch Method Analyzed Az Hates
pH^ 6.9 pH Units 1 1.0 1.0 0K16044 3M 4500H+B-2011 11/17/20 09:20 ASR Q-01
Temperature for pH(deg.C) 21 pH Units 1 0K16044 3M 4500H+B-2011 11/17/20 09:20 ASR Q-01
Total Suspended Solids^ 9.0 mg/L 1 2.5 2.5 0K17001 SM 2540D-2011 11/18/20 09:41 AMP LP-02
Classical Chemistry Parameters
^-ENCO Jacksonville certified analyte[NELAC E82277] 1
Analvte fCAS Numbed Results Boa !lass DF MDL £L Ranh Method Analyzed Es Notes
Oil&Grease(HEM-SGT)Non-Polar 3.29 I mg/L 1 2.70 5.00 0K18002 EPA 1664B 11/18/20 16:00 LTS
Material
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in hill.
Page 4 of 8

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QUALITY CONTROL DATA
Metals by EPA 200 Series Methods-Quality ControlII
Batch OK16011-EPA 3005A
Blank(0K16011-BLK1) Prepared:11/16/2020 11:15 Analyzed:11/17/2020 12:36
Spike Source %REC RPD
AnaMe Result Flan ROIL Units Level Result %REC LIMAS RPD Limit Notes
Copper 2.20 U 5.00 ug/L
Lead 1.60 U 5.00 ug/L
Zinc 75.0 U 200 ug/L
Blank(0K16011-BLK2) Prepared:11/16/2020 11:15 Analyzed:11/17/2020 12:40II
Spike Source %REC RPD
Anaive Result Flan Mk Units Level Result %REC jje t6 RPD Limit Notes
Copper 0.220 U 0.500 ug/L
Lead 0.160 U 0.500 ug/L
Zinc 7.50 U 20.0 ug/L
LCS(0K16011-BS1) Prepared:11/16/2020 11:15 Analyzed:11/17/2020 12:44
Spike Source %REC RPD
_Analrie Result Flan POI Units Level Result %REC 'Mks RPD Ljmlt Motes
Copper 498 5.00 ug/L 500 100 85-115
Lead 484 5.00 ug/L 500 97 85-115
Zinc 480 200 ug/L 500 96 85-115
Matrix Spike(0K16011-MS1) Prepared:11/16/2020 11:15 Analy
zed:11/17/2020 12:56
Source:AD06308-01
Spike Source %REC RPD
Anakta Result Flan E01 Units Level Result %REC Limits RPD Limit Notes
Copper 485 5.00 ug/L 500 2.20 U 97 70-130
Lead 493 5.00 ug/L 500 1.60 U 99 70-130
Zinc 482 200 ug/L 500 75.0 U 96 70-130
Matrix Spike Dup(0K16011-MSD1) Prepared:11/16/2020 11:15 Analyzed:11/17/2020 13:04
-
Source:AD06308-01 1
Spike Source %REC RPD
Analvte Result Han P91 Units Level Result %REC Limits RPD Limit Notes
Copper 490 5.00 ug/L 500 2.20 U 98 70-130 1 30
Lead 489 5.00 ug/L 500 1.60 U 98 70-130 0.7 30
Zinc 489 200 ug/L 500 75.0 U 98 70-130 2 30
Classical Chemistry Parameters-Quality Control `
Batch OK16044-NO PREP 1
LCS(0K16044-BS1) Prepared&Analyzed:11/17/2020 09:20
1
Spike Source %REC RPD
Analvte Result Flea Mt Units Level Result %REC Limits RPD Limit Hates
pH 7.0 1.0 pH Units 7.00 100 99-102
Temperature for pH(deg.C) 21 pH Units 0-200
Duplicate(0K16044-DUP1) Prepared&Analyzed: 11/17/2020 09:20 `
-
Source:AD06021-01 1
Spike
REC
nal Result Flan POL Units Level Result %REC U RPD
nilta RPD
A
Limit Notes_
pH 8.1 1.0 pH Units 8.1 0.1 10 Q-01
Temperature for pH(deg.C) 21 pH Units 21 0.5 200 Q-01
• Batch OK17001-NO PREP
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 5 of 8

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QUALITY CONTROL DATA
Classical Chemistry Parameters-Quality Control
Blank(0K17001-BLK1) Prepared:11/17/2020 07:55 Analy
zed:11/18/2020 09:41II
Spike Source %REC RPD
Anahrte Result Elan P91 Units Level R9sult %REC Lim& RPD Limit NAIL
Total Suspended Solids 2.5 U 2.5 mg/L
LCS(0K17001-BS1) Prepared:11/17/2020 07:55 Analyzed:11/18/2020 09:41
1
Spike Source %REC RPD
Analltte Result Elea EOL Units Level Result %REC Lin its RPD Limit MOMS_
Total Suspended Solids 94 2.5 mg/L 100 94 80-120
Duplicate(0K17001-DUP1) Prepared:11/17/2020 07:55 Analyzed:11/18/2020 09:41
Source:AD06692-01 1
Spike Source %REC RPD
Analtute Result Elan POL Units Level Refit %REC LIMA RPD Limit gates
Total Suspended Solids 20 2.5 mg/L 12 50 20 QM-12,LP-02
Classical Chemistry Parameters-Quality Control
Batch OK18002-EPA 1664B
Blank(0K18002-BLK1) Prepared:11/18/2020 11:45 Analyzed:11/18/2020 16:00
1
Spike Source %REC RPD
Anande Result Elan E01 Units Level Result %REC Limits RPD Limit BOIL
Oil&Grease(HEM-SGT)Non-Polar Material 2.70 U 5.00 mg/L
LCS(0K18002-BS1) Prepared:11/18/2020 11:45 Analyzed:11/18/2020 16:00
Spike Source %REC RPD
Analvte Result Elm P91 Units Level &mit %REC L1mita RPD Limit &tel
Oil&Grease(HEM-SGT)Non-Polar Material 92.8 5.00 mg/L 79.7 116 64-132
LCS Dup(0K18002-BSD1) Prepared:11/18/2020 11:45 Analyzed:11/18/2020 16:00
Spike Source %REC RPD
_Analirte Result Elan E01 Units Level Result %REC Limits RPD Limit !Votes
Oil&Grease(HEM-SGT)Non-Polar Material 100 5.00 mg/L 80.0 126 64-132 8 34
Matrix Spike(0K18002-MS1) Prepared:11/18/2020 11:45 Analy
zed:11/18/2020 16:00 1
Source:BD03700-01
Spike Source %REC RPD
Anahle Result Elaa P01 Units Level Result %REC Llmitt RPD Limit )Yatet
Oil&Grease(HEM-SGT)Non-Polar Material 80.3 5.00 mg/L 77.2 2.70 U 104 64-132
FINAL This report relates only to the sample as received by the laboratory,and may
only be reproduced In full. Page 6 of 8

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FLAGS/NOTES AND DEFINITIONS
PQL PQL: Practical Quantitation Limit. The PQL presented is the laboratory MRL.
B Results are based upon membrane filter colony counts that are outside the method indicated ideal range.
I The reported value is between the laboratory method detection limit(MDL)and the practical quantitation
limit(PQL).
7 Estimated value.
K Off-scale low;Actual value is known to be less than the value given.
L Off-scale high;Actual value is known to be greater than value given.
M Presence of analyte is verified but not quantified;the actual value is less than the MRL but greater than
the MDL.
N Presumptive evidence of presence of material.
O Sampled,but analysis lost or not performed.
Q Sample exceeded the accepted holding time.
T Value reported is less than the laboratory method detection limit.The value is reported for informational
purposes only and shall not be used in statistical analysis.
U Indicates that the compound was analyzed for but not detected.
✓ Indicates that the analyte was detected in both the sample and the associated method blank.
Y The laboratory analysis was from an improperly preserved sample.The data may not be accurate.
Z Too many colonies were present(TNTC);the numeric value represents the filtration volume.
7 Data are rejected and should not be used.Some or all of the quality control data for the analyte were
outside criteria,and the presence or absence of the analyte cannot be determined from the data.
* Not reported due to interference.
[CALC] Calculated analyte-MDL/MRL reported to the highest reporting limit of the component analyses.
LP-02 Filtered residue did not meet 2.5-200mg range.
Q-01 Analysis performed outside of method-specified holding time.
QM-12 Precision between duplicate samples was outside acceptance limits.
FINAL This report relates only to the sample as received by the laboratory,and may only be reproduced in full. Page 7 of 8

ENVIRONMENTAL CONSERVATION LABORATORIES CHAIN-OF-CUSTODY RECORD www.encolabs.com
S.N
` 10775 Central Port Dr 4810 Executive Park Court.Suite 111 102-A Woodwinds Industrial Ct.
Orlando.FL 32824 Jacksonville.FL 32216-6069 Cary,NC 27511
[phone] [phone] Fax[phone] [phone] rax(919)487-3515 Page ( of
Client Name Protect Number Requested Analyses Requested Turnaround
Times
APTIIw4{=nrjr(Arne tttttI&It!)r tstructu:q iCBOO4 0
Address Project Name/Deac C3Note Rush requests subject to
725 J.S. Highway 301 South Storm WaterSamales acceptance by the facility
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Tampe,FL 3381.9 u) 0 ✓Standard
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Note:All samples submitted to ENCO Labs are in accordance with the terms and condbons listed on the reverse of this torm,unless prior written agreements exist