NC0035670_Renewal (Application)_20230118

'y �rc STATE a
ROY COOPER
Governor
ELIZABETH S.BISER
W4M
Secretary az
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
January 23, 2023
Dare County
Patrick Irwin, Utilities Director
PO Box 1000
Manteo, NC 27954-1000
Subject: Permit Renewal
Application No. NC0035670
Skyco Regional WTP
Dare County
Dear Applicant:
The Water Quality Permitting Section acknowledges the January 18, 2023, receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal.
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https://deq.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
DE Q 5 Nepartment of vil Quality Divisin of Reorces
WashingtonorthCarolina RegDional Office 943En Washingtonronmenta Square M o
all Washington.Water Northsu Carolina 27889
w.....e a tmivernmaFtW /"� 252.9466481

�Y OF
; ' COUNTY OF DARE
Water Department
do '•! fir- 600 Mustian Street, Kill Devil Hills, NC 27948
North Reverse Osmosis Phone [phone]
Treatment Facility Fax [phone]
January 12, 2023
RECEI V
Ms. Wren Thedford BAN E�
NC DEQ / DWR/ NPDES Unit 1 or 2023
1617 Mail Service Center
Raleigh, NC 27699-1617 �DEQ/DWR/NP
DES
Re: Dare County, Skyco WTP NPDES Permit Renewal NC0035670
The NPDES permit for the Skyco WTP expires on September 30, 2023. As required, we are
forwarding a renewal application package for the facility requesting renewal of the NPDES
permit. The renewal package includes: this cover letter; a completed application Form 2C, a
schematic of flow through the facilities and an outfall map.
Dare County water is planning to no longer use the anion exchange treatment units and instead
will expand the nanofiltration facility from 3 MGD to 5.2 MGD beginning in early 2024. This will
require a maximum outfall flow of 1.3 MGD through the outfall. The yearly average will be much
less as we are a tourism driven system with high flows in season and lower flows after.
If you have any questions or comments, please call Patrick Irwin, Utilities Director, at 252-475-
5603.
Sincerely,
Patrick Irwin
Utilities Director
Dare County Water Department
LAND OF BEGINNINGS

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
2C "EPA Application for NPDES Permit to Discharge Wastewater
NPDES EXISTING MANUFACTURING,COMMERCIAL,MINING,AND SILVICULTURE OPERATIONS
SECTION 1.OUTFALL LOCATION(40 CFR 122.21(g)(1))
1.1 Provide information on each of the facility's outfalls in the table below.
o Outfall Receiving Water Name Latitude Longitude
Number
001 UT to Croatan Sound 35° 53' 08" N -75° 39' 36' W
SECTION 2.LINE DRAWING(40 CFR 122.21(g)(2))
cn 2.1 Have you attached a line drawing to this application that shows the water flow through your facility with a water
C 3 balance?(See instructions for drawing requirements.See Exhibit 2C-1 at end of instructions for example.)
J
❑r Yes ❑ No
SECTION 3.AVERAGE FLOWS AND TREATMENT(40 CFR 122.21(g)(3))
3.1 For each outfall identified under Item 1.1,provide average flow and treatment information.Add additional sheets if
necessary.
**Outfall Number**o01
Operations Contributing to Flow
Operation Average Flow
Membrane Nano Filtration 0.526 mgd
mgd
is
mgd
73
N mgd
Treatment Units
rn Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
Three-1MGD Units and Two-1.1 MGD Units Nano Filtration 0
EPA Form 3510-2C(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
3.1 **Outfall Number**
cont. Operations Contributing to Flow
Operation Average Flow
mgd
mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
-0
d
0
U
m
E
o
H
**Outfall Number**
y Operations Contributing to Flow
Operation Average Flow
U-
a, mgd
d
' mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
3.2 Are you applying for an NPDES permit to operate a privately owned treatment works?
E ❑ Yes 0 No 4 SKIP to Section 4.
cn
ei.= 3.3 Have you attached a list that identifies each user of the treatment works?
❑ Yes ❑ No
EPA Form 3510-2C(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
SECTION 4.INTERMITTENT FLOWS(40 CFR 122.21(g)(4))
4.1 Except for storm runoff,leaks,or spills,are any discharges described in Sections 1 and 3 intermittent or seasonal?
❑ Yes ❑✓ No 4 SKIP to Section 5.
4.2 Provide information on intermittent or seasonal flows for each applicable outfall.Attach additional pages,if necessary.
Outfall Operation Frec uency Flow Rate
Number (list) Average Average Long-Term Maximum Duration
DayslWeek MonthslYear Average Daily
days/week months/year mgd mgd days
30 days/week months/year mgd mgd days
days/week months/year mgd mgd days
cu
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
SECTION 5.PRODUCTION(40 CFR 122.21(g)(5))
5.1 Do any effluent limitation guidelines(ELGs)promulgated by EPA under Section 304 of the CWA apply to your facility?
❑ Yes 0 No 4 SKIP to Section 6.
5.2 Provide the following information on applicable ELGs.
w ELG Category ELG Subcategory Regulatory Citation
a
5.3 Are any of the applicable ELGs expressed in terms of production(or other measure of operation)?
❑ Yes ❑ No 4 SKIP to Section 6.
.773 5.4 Provide an actual measure of daily production expressed in terms and units of applicable ELGs.
Outfall Unit of
Operation,Product,or Material Quantity per Day
-0 Number Measure
0
0
a
EPA Form 3510-2C(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
SECTION 6.IMPROVEMENTS(40 CFR 122.21(g)(6))
6.1 Are you presently required by any federal,state,or local authority to meet an implementation schedule for constructing,
upgrading,or operating wastewater treatment equipment or practices or any other environmental programs that could
affect the discharges described in this application?
❑ Yes El No 4 SKIP to Item 6.3.
6.2 Briefly identify each applicable project in the table below.
En
Affected Final Compliance Dates
Brief Identification and Description of Outfalls Source(s)of
o Project (list outfall Discharge Required Projected
number)
cn
d
rn
a
6.3 Have you attached sheets describing any additional water pollution control programs(or other environmental projects
that may affect your discharges)that you now have underway or planned?(optional item)
❑ Yes ❑ No ❑ Not applicable
SECTION 7.EFFLUENT AND INTAKE CHARACTERISTICS(40 CFR 122.21(g)(7))
See the instructions to determine the pollutants and parameters you are required to monitor and,in turn,the tables you must
complete.Not all applicants need to complete each table.
Table A.Conventional and Non-Conventional Pollutants
7.1 Are you requesting a waiver from your NPDES permitting authority for one or more of the Table A pollutants for any of
your outfalls?
❑ Yes ElNo 4 SKIP to Item 7.3.
7.2 If yes, indicate the applicable outfalls below.Attach waiver request and other required information to the application.
Outfall Number Outfall Number Outfall Number
CO
7.3 Have you completed monitoring for all Table A pollutants at each of your outfalls for which a waiver has not been
N requested and attached the results to this application package?
0 Yes 1-1 No;a waiver has been requested from my NPDES
permitting authority for all pollutants at all outfalls.
CO
t, Table B.Toxic Metals,Cyanide,Total Phenols,and Organic Toxic Pollutants
cu
7.4 Do any of the facility's processes that contribute wastewater fall into one or more of the primary industry categories
listed in Exhibit 2C-3?(See end of instructions for exhibit.)
❑ Yes r❑ No 4 SKIP to Item 7.8.
COcEs
7.5 Have you checked"Testing Required"for all toxic metals,cyanide,and total phenols in Section 1 of Table B?
❑ Yes ❑ No
7.6 List the applicable primary industry categories and check the boxes indicating the required GC/MS fraction(s)identified
in Exhibit 2C-3.
Primary Industry Category Required GC/MS Fraction(s)
(Check applicable boxes.)
D Volatile 0 Acid 0 Base/Neutral ❑ Pesticide
❑Volatile 0 Acid 0 Base/Neutral 0 Pesticide
❑Volatile 0 Acid 0 Base/Neutral ❑ Pesticide
EPA Form 3510-2C(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
7.7 Have you checked"Testing Required"for all required pollutants in Sections 2 through 5 of Table B for each of the
GC/MS fractions checked in Item 7.6?
❑ Yes ❑ No
7.8 Have you checked"Believed Present"or"Believed Absent"for all pollutants listed in Sections 1 through 5 of Table B
where testing is not required?
El Yes ❑ No
7.9 Have you provided(1)quantitative data for those Section 1,Table B,pollutants for which you have indicated testing is
required or(2)quantitative data or other required information for those Section 1,Table B,pollutants that you have
indicated are"Believed Present"in your discharge?
❑ Yes ❑ No
7.10 Does the applicant qualify for a small business exemption under the criteria specified in the instructions?
❑ Yes 4 Note that you qualify at the top of Table B, ❑ No
then SKIP to Item 7.12.
7.11 Have you provided(1)quantitative data for those Sections 2 through 5,Table B,pollutants for which you have
determined testing is required or(2)quantitative data or an explanation for those Sections 2 through 5,Table B,
y pollutants you have indicated are"Believed Present"in your discharge?
`—' ❑ Yes ❑r No
w Table C.Certain Conventional and Non-Conventional Pollutants
Es 7.12 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table C
for all outfalls?
El Yes ❑ No
7.13 Have you completed Table C by providing(1)quantitative data for those pollutants that are limited either directly or
0 indirectly in an ELG and/or(2)quantitative data or an explanation for those pollutants for which you have indicated
"Believed Present"?
El Yes ❑ No
Table D.Certain Hazardous Substances and Asbestos
7.14 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed in Table D for
all outfalls?
❑ Yes El No
7.15 Have you completed Table D by(1)describing the reasons the applicable pollutants are expected to be discharged
and(2)by providing quantitative data,if available?
❑ Yes El No
Table E.2,3,7,8-Tetrachlorodibenzo-p-Dioxin(2,3,7,8-TCDD)
7.16 Does the facility use or manufacture one or more of the 2,3,7,8-TCDD congeners listed in the instructions,or do you
know or have reason to believe that TCDD is or may be present in the effluent?
❑ Yes-4 Complete Table E. ❑✓ No 4 SKIP to Section 8.
7.17 Have you completed Table E by reporting qualitative data for TCDD?
❑ Yes ❑ No
SECTION 8.USED OR MANUFACTURED TOXICS(40 CFR 122.21(g)(9))
8.1 Is any pollutant listed in Table B a substance or a component of a substance used or manufactured at your facility as
an intermediate or final product or byproduct?
CD
❑ Yes ❑ No 4 SKIP to Section 9.
8.2 List the pollutants below.
n 12 1. 4. 7.
-0 2. 5. 8.
3. 6. 9.
EPA Form 3510-2C(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
SECTION 9.BIOLOGICAL TOXICITY TESTS(40 CFR 122.21(g)(11))
9.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made
within the last three years on(1)any of your discharges or(2)on a receiving water in relation to your discharge?
�, ❑✓ Yes ❑ No 4 SKIP to Section 10.
9.2 Identify the tests and their purposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
o Permitting Authority?
Acute ToxicityAcute Mortalityof Mysid y ❑ Yes ❑ No 07/01/2022
0
'co El Yes ❑ No 10/01/2022
0 Yes ❑ No 01/01/2023
SECTION 10.CONTRACT ANALYSES(40 CFR 122.21(g)(12))
10.1 Were any of the analyses reported in Section 7 performed by a contract laboratory or consulting firm?
❑ Yes ❑ No 4 SKIP to Section 11.
10.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number 1 Laboratory Number 2 Laboratory Number 3
Name of laboratory/firm Environmental Chemist
;, Laboratory address 6602 Windmill Way
Irs
Wilmington,NC 28405
U
Co
•C
O Phone number
[phone]
Pollutant(s)analyzed pH,TSS,Total Chlorine,
Ammonia as Nitrogen,Total
Copper,Total Nitrogen,Total
Phosphorus.
SECTION 11.ADDITIONAL INFORMATION(40 CFR 122.21(g)(13))
11.1 Has the NPDES permitting authority requested additional information?
❑ Yes ❑ No 4 SKIP to Section 12.
0
11.2 List the information requested and attach it to this application.
1. 4.
Tvi
0
2. 5.
-0
3. 6.
EPA Form 3510-2C(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0035670 Skyco WTP OMB No.2040-0004
SECTION 12.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
12.1 In Column 1 below,mark the sections of Form 2C that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to complete all sections or provide attachments.
Column 1 Column 2
❑ Section 1:Outfall Location [ w/attachments
2 Section 2:Line Drawing 0 wl line drawing ❑ wl additional attachments
ui Section 3:Average Flows and w/list of each user of
ElTreatment wl attachments ❑ privately owned treatment
works
❑ Section 4: Intermittent Flows ❑ w/attachments
❑ Section 5:Production ❑ w/attachments
w/optional additional
sheets describing any
0 Section 6: Improvements ❑ w/attachments ❑ additional pollution control
plans
❑ w/request for a waiver and ❑ wl explanation for identical
supporting information outfalls
wl small business exemption w/other attachments
❑ requestas ❑
❑ Section 7:Effluent and Intake ❑ w/Table A ❑✓ w/Table B
Characteristics
0
❑✓ w/Table C ❑ wl Table D
d ❑ w/Table E ❑ wl analytical results as an
attachment
❑ Section 8:Used or Manufactured ❑ w/attachments
Toxics
❑ Section 9:Biological Toxicity ❑ wl attachments
Tests
U
0 Section 10:Contract Analyses ❑ wl attachments
❑✓ Section 11:Additional Information ❑ w/attachments
0 Section 12:Checklist and ❑ w/attachments
Certification Statement
12.2 Certification Statement
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, lam aware that there are significant penalties for submitting false information,including the
possibility of fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Patrick Irwin Utilities Director
Signature _ Date signed
i/ i2/2Oz3
EPA Form 3510-2C(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE A.CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(iii))a
Effluent Intake
(Optional)
Waiver Units Maximum Maximum Long-Term
Pollutant Requested (specify) Daily Monthly Average Daily Number of Long-Term Number of
(if applicable) Discharge Discharge Discharge Analyses Average Value Analyses
(required) (if available) (if available)
❑ Check here if you have applied to your NPDES permitting authority for a waiver for all of the pollutants listed on this table for the noted outfall.
Biochemical oxygen demand Concentration
1' El(BOD5) Mass
•
Chemical oxygen demand Concentration
2' El(COD) Mass
Concentration
3. Total organic carbon(TOC) ❑
Mass
Concentration mg/L 20.2 20.2 18.8 24
4. Total suspended solids(TSS) ❑
Mass
Concentration mg/L 5.1 5.1 4 12
5. Ammonia(as N) ❑
Mass
6. Flow ❑ Rate MGD 0.9 0.9 0.49 12
Temperature(winter) ❑ °C °C 20 20 18 12
7.
Temperature(summer) ❑ °C °C 20 20 18 12
pH(minimum) ❑ Standard units s.u. 7.1 7.1 7.81 24
8.
pH(maximum) ❑ Standard units S.U. 8.01 8.01 7.81 24
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 9

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Discharge Discharge
f available) Discharge harge Analyses AverageValue Analyses
(required)
(if available)
0 Check here if you qualify as a small business per the instructions to Form 2C and,therefore,do not need to submit quantitative data for any of the organic toxic pollutants in Sections
2 through 5 of this table.Note,however,that you must still indicate in the appropriate column of this table if you believe any of the pollutants listed are present in your discharge.
Section 1.Toxic Metals,Cyanide,and Total Phenols
Antimony,total Concentration
1.1 (7440-36-0) Mass
Arsenic,total Concentration
1.2 (7440-38-2) 0 � Mass
Beryllium,total0 Concentration
1.3 El 0
(7440-41-7) Mass
Cadmium,total Concentration
1.4 (7440-43-9) El 0 0 Mass
Chromium,total Concentration
1.5 (7440-47-3) � El Mass
Copper,total 0 Concentration mg/L 0.001 0.001 0.001 12
1.6 0 0
(7440-50-8) Mass
Lead,total Concentration
1.7 (7439-92-1) 0 0 ❑ Mass
Mercury,total Concentration
1.8 (7439-97-6) Mass
Nickel,total Concentration
1'9 (7440-02-0) El � � Mass
Selenium,total Concentration
1.10 (7782 49 2) �
Mass
Silver,total Concentration
1.11 (7440-22-4)
Mass
EPA Form 3510-2C(Revised 3-19) Page 11

1 EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of of
Discharge Discharge required f ava labile) DisDcharge Analyses AverageValue Analyses
(if available)
Thallium,total Concentration
1.12 (7440-28-0) 0 0 El Mass
Zinc,total Concentration
1.13 (7440-66-6) 0 0 0
Mass
1.14 Cyanide,total 0 Concentration
0 El
(57-12-5) Mass
1.15 Phenols,total El 0
Concentration
Mass
Section 2.Organic Toxic Pollutants(GC/MS Fraction—Volatile Compounds)
Acrolein Concentration
2.1 El El(107-02-8) 0
Mass
Acrylonitrile Concentration
2.2 El El 0
(107-13-1) Mass
2.3 Benzene Concentration
(71-43-2) Mass
2.4 Bromoform Concentration
0 0 0
(75-25-2) Mass
2.5 Carbon tetrachloride Concentration
(56-23-5) Mass
Chlorobenzene Concentration
2.6 (108-90-7) 0 0 0 Mass
Chlorodibromomethane Concentration
2.7 (124-48-1) El ❑ ❑ Mass
2.8 Chloroethane 0 Concentration
0 0
(75-00-3) Mass
EPA Form 3510-2C(Revised 3-19) Page 12

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No,2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of of
Discharge Discharge Discharge a Analyses Average Analyses
(required) (if available) g Value
(if available)
2 9 2-chloroethylvinyl ether ❑ 0 Concentration
(110-75-8) Mass
Concentration
2.10 Chloroform(67-66-3) El 0 Mass
2.11 Dichlorobromomethane El 0
0 Concentration
(75-27-4) Mass
212 1,1-dichloroethane El ❑ ❑ Concentration
(75-34-3) Mass
213 12-dichloroethane 0 0 0 Concentration
(107-06-2) Mass
2.14 11-dichloroethylene 0 ❑ ❑ Concentration
(75-35-4) Mass
2.15 12-dichloropropane 0 0
0 Concentration
(78-87-5) Mass
2.16 13-dichloropropylene ❑ 0
❑ Concentration
(542-75-6) Mass
217 Ethylbenzene ❑ 0 Concentration
0(100-41-4) Mass
2.18 Methyl bromide 0 ❑ Concentration
(74-83-9) Mass
2.19 Methyl chloride El Concentration
(74-87-3) Mass
2 20 Methylene chloride CI ID Concentration
(75-09-2) Mass
2.21 1 1,2 2-tetrachloroethane ❑ 0
❑ Concentration
(79-34-5) Mass
EPA Form 3510-2C(Revised 3-19) Page 13

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of
Discharge Discharge DisDchar a aily Analyses Average Analyses
(required) (if available) g Value
(if available)
2 22 Tetrachloroethylene ❑ 0 0 Concentration
(127-18-4) Mass
Toluene Concentration
2.23 (108-88-3) 0 0 0 Mass
2.24 1 2-trans-dichloroethylene 0 Concentration
(156-60-5) Mass
2.25 1,1,1-trichloroethane ❑ Concentration
(71-55-6) Mass
2.26 1 1,2-trichloroethane 0 ❑ 0 Concentration
(79-00-5) Mass
2.27 Trichloroethylene ❑ ❑ 0 Concentration
(79-01-6) Mass
2.28 Vinyl chloride ❑ Concentration
0 0(75-01-4) Mass
Section 3.Organic Toxic Pollutants(GCIMS Fraction—Acid Compounds)
3.1 2-chlorophenol 0 El0 Concentration
•
(95-57-8) Mass
2,4-dichlorophenol0 Concentration
3.2 El 0
(120-83-2) Mass
2,4-dimethylphenol 0 Concentration
3.3 (105-67-9) Mass
4,6-dinitro-o-cresol 0 Concentration
3.4 (534-52-1) Mass
3.5 2,4-dinitrophenol Concentration
(51-28-5) Mass
EPA Form 3510-2C(Revised 3-19) Page 14

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))l
Presence or Absence
(check one) Effluent Intake
(optional)
PollutantlParameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Discharge Discharge Daily of Average of
(required) (if available) Discharge Analyses Analyses
Value
(if available)
3.6 2-nitrophenol Concentration
(88-75-5) Mass
4-nitrophenol Concentration
3.7 1=1 El
(100-02-7) Mass
3.8 p-chloro-m-cresol El I: Concentration
(59-50-7) Mass
3.9 Pentachlorophenol El Elo Concentration
(87-86-5) Mass
Phenol 0 Concentration
3.10 (108-95-2) Mass
3.11 2,4,6-trichlorophenol ❑ ❑ ❑ Concentration
(88-05-2) Mass
Section 4.Organic Toxic Pollutants(GCIMS Fraction—Base(Neutral Compounds)
4.1 Acenaphthene El ❑ 0 Concentration
(83-32-9) Mass
Acenaphthylene Concentration
4.2 (208-96-8) Mass
Anthracene Concentration
4.3 •
(120 12 7) ❑ 0 Mass _
4.4 Benzidine ❑ Concentration
El El(92-87-5) Mass
4.5 Benzo(a)anthracene ❑ ❑ ❑ Concentration
(56-55-3) Mass
4.6 Benzo(a) pyrene ❑ ❑ ❑ Concentration
(50-32-8) Mass
EPA Form 3510-2C(Revised 3-19) Page 15

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Dreq(required) ifavalabe) Discharge Analyses AverageValue Analyses
4.7 3,4-benzofluoranthene 0 0 Concentration
(205-99-2) Mass
Benzo(ghi)perylene Concentration
4.8 El 0
(191-24-2) Mass
Benzo(k)fluoranthene 0 Concentration
4.9 (207-08-9) Mass
4.10 Bis(2-chloroethoxy)methane 0 Concentration
(111-91-1) Mass
4.11 Bis(2-chloroethyl)ether Concentration
(111-44-4) Mass
4.12 Bis(2-chloroisopropyl)ether 0 Concentration
(102-80-1) Mass
4.13 Bis(2-ethylhexyl)phthalate Concentration
(117-81-7) Mass
4.14 4-bromophenyl phenyl ether Concentration
El 0 El
(101-55-3) Mass
4.15 Butyl benzyl phthalate Concentration
(85-68-7) Mass
4.16 2-chloronaphthalene Concentration
(91-58-7) Mass
4-chlorophenyl phenyl ether Concentration
4.17 (7005-72-3) Mass
4.18 Chrysene Concentration
(218-01-9) Mass
4.19 Dibenzo(a,h)anthracene Concentration
(53-70-3) Mass
EPA Form 3510-2C(Revised 3-19) Page 16

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Discharge ifavalablle)scharge
DisDcharge Analyses AverageValue Analyses
required
(if available)
4.20 12-dichlorobenzene ❑ ❑ Concentration
(95-50-1) Mass
4.21 1,3-dichlorobenzene ❑ Concentration
0 El
(541-73-1) Mass
4.22 1 4-dichlorobenzene ❑ 0 Concentration
(106-46-7) Mass
4.23 3,3-dichlorobenzidine 0 El0 Concentration
(91-94-1) Mass
4.24 Diethyl phthalate 0 Concentration
(84-66-2) Mass
4.25 Dimethyl phthalate Elo Concentration
(131-11-3) Mass
4.26 Di-n-butyl phthalate 0 ❑ 0 Concentration
(84-74-2) Mass
4.27 2 4-dinitrotoluene El ❑ Concentration
(121-14-2) Mass
4.28 2,6-dinitrotoluene 0 Concentration
(606-20-2) Mass
4.29 Di-n-octyl phthalate ❑ Concentration
(117-84-0) Mass
1,2-Diphenylhydrazine Concentration
4.30 El 0
(as azobenzene)(122-66-7) Mass
4.31 Fluoranthene ❑ Concentration
(206-44-0) Mass
4.32 Fluorene ❑ Concentration
(86-73-7) Mass
EPA Form 3510-2C(Revised 3-19) Page 17

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
DailyMonthlyTerm
Present Absent
aily of of
Discharge Dischargeava e) Di D harge Analyses AverageValue Analyses
(required) (if available) (if available)
4.33 Hexachlorobenzene Concentration
(118-74-1) Mass
4.34 Hexachlorobutadiene 0 Concentration
(87-68-3) Mass
4.35 Hexachlorocyclopentadiene 0 ❑ Concentration
(77-47-4) Mass
4.36 Hexachloroethane ❑ Concentration
(67-72-1) Mass
4.37 Indeno(1,2,3-cd)pyrene Concentration
El El 0
(193-39-5) Mass
4.38 Isophorone Concentration
(78-59-1) Mass
4.39 Naphthalene 0 Concentration
0 0
(91-20-3) Mass
4.40 Nitrobenzene Concentration
(98-95-3) Mass
4.41 N-nitrosodimethylamine 0 Concentration
El 0(62-75-9) Mass
4.42 N-nitrosodi-n-propylamine 0 0 Concentration
(621-64-7) Mass
4.43 N-nitrosodiphenylamine 0 ❑ 0 Concentration
(86-30-6) Mass
4.44 Phenanthrene ❑ Concentration
(85-01-8) Mass
4.45 Pyrene Concentration
(129-00-0) Mass
EPA Form 3510-2C(Revised 3-19) Page 18

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of of
Discharge Discharge Discharge a Analyses Average Analyses
(required) (if available) g Value
(if available)
4.46 1,24-trichlorobenzene ❑ ❑ ❑ Concentration
(120-82-1) Mass
Section 5.Organic Toxic Pollutants(GC/MS Fraction—Pesticides)
5.1 Aldrin Concentration
(309-00-2) Mass
5.2 a-BHC 0 Concentration
(319-84-6) Mass
5.3 R-BHC 0 Concentration
(319-85-7) Mass
5.4 y-BHC 0 Concentration
(58-89-9) Mass
5.5 i-BHC 0 Concentration
El El
(319-86-8) Mass
5.6 Chlordane 0 Concentration
(57-74-9) Mass
5.7 4,4'-DDT 0 Concentration
D El
(50-29-3) Mass
5.8 4 4'-DDE ❑ Concentration
(72-55-9) Mass
5.9 4,4'-DDD 0 Concentration
El El
(72-54-8) Mass
5.10 Dieldrin Concentration
ID IDI El
(60-57-1) Mass
5.11 a-endosulfan 0 Concentration
El 0(115-29-7) Mass
EPA Form 3510-2C(Revised 3-19) Page 19

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))l
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (speci ) Maximum Maximum Average Number Long- Number
DailyMonthlyTerm
Present Absent
Discharge e(required)
(if available)
e Daily Discharge Analyses AverageValue Analyses
re uiretl
(if available)
5.12 R-endosulfan ❑ ❑ ❑ Concentration
(115-29-7) Mass
Endosulfan sulfate Concentration
5.13 (1031-07-8) ❑ ❑ El
Endrin Concentration
5.14 (72-20-8) ❑ ❑ El
5.15 Endrin aldehyde ❑ ❑ ❑ Concentration
(7421-93-4) Mass
5.16 Heptachlor ❑ ❑ ❑ Concentration
(76-44-8) Mass
Heptachlor epoxide Concentration
5.17 (1024-57-3) ❑ ❑ ❑
Mass
PCB-1242 Concentration
5.18 (53469-21-9) ❑ 0 ❑
Mass
PCB-1254 Concentration
5.19 (11097-69-1) 0 ❑ ❑
Mass
PCB-1221 Concentration
5.20 (11104-28-2) ❑ ❑ ❑
Mass
PCB-1232 Concentration
5.21 (11141-16-5) ❑ ❑ ❑
Mass
PCB-1248 Concentration
5.22 (12672-29-6) ❑ ❑ ❑
Mass
PCB-1260 Concentration
5.23 (11096-82-5) ❑ ❑ ❑
Mass
PCB-1016 Concentration
5.24 (12674-11-2) ❑ ❑ 0
Mass
EPA Form 3510-2C(Revised 3-19) Page 20

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Lon Maximum
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
Daily of of
Discharge Discharge Average
(required) (if available) Discharge Analyses Value Analyses
(if available)
Toxaphene Concentration
5.25 (8001-35-2) ❑ ❑ ❑
Mass
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
a
w_...... ,..,,,,,
rs.,..... ‘... .
ise. ,... to
1 or, ...a.
-g -0., rr,
.*0 --O Q
EPA Form 3510-2C(Revised 3-19) Page 21

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))l
Presence or Absence Intake
(check one) Effluent (Optional)
Units
Pollutant Maximum Long-Term
Believed Believed (specify) Maximum Daily Monthly Average Daily Number of Long-Term Number of
Present Absent Discharge Discharge Discharge Analyses Average Analyses
(required)
(if available) (if available) Value
❑ Check here if you believe all pollutants on Table C to be present in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
❑ Check here if you believe all pollutants on Table C to be absent in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
1 Bromide ❑ ❑ Concentration
(24959-67-9) Mass
Chlorine,total Concentration mg/L <10 <10 <10 12
2. residual ❑ El
3. Color El ❑ Concentration
Mass
Concentration
4. Fecal coliform ❑ ❑ Mass
5 Fluoride ❑ ❑ Concentration
(16984-48-8) Mass
6 Nitrate-nitrite ❑ Concentration
El
Mass
Nitrogen,total Concentration mg/L 6.7 6.7 5.47 4
7' organic(as N) El ❑ Mass
Concentration
8. Oil and grease ❑ ❑ Mass
Phosphorus(as Concentration mg/L 1.17 1.17 0.985 4
9' P),total(7723-14-0) ❑ ❑ Mass
10. Sulfate(as SO4) ❑ ❑ Concentration
(14808-79-8) Mass
Concentration
11. Sulfide(as S) ❑ ❑ Mass
EPA Form 3510-2C(Revised 3-19) Page 23

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))l
Presence or Absence Intake
(check one) Effluent (Optional)
Units
Pollutant Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Value Analyses
(if available) (if available)
12. Sulfite(as S03) ❑ ❑ Concentration
(14265-45-3) Mass
Concentration
13. Surfactants 0 ❑ Mass
14.
Aluminum,total Concentration
0 El
(7429-90-5) Mass
15. Barium,total ❑ ❑ Concentration
(7440-39-3) Mass
16. Boron,total ❑ ❑ Concentration
(7440-42-8) Mass
1 Cobalt,total ❑ Concentration
(7440-48-4) Mass
18 Iron,totalEl ❑ Concentration
(7439-89-6) Mass
19 Magnesium,total 0 ❑ Concentration
(7439-95-4) Mass
Molybdenum, Concentration
20. total ❑ 0Mass
(7439-98-7)
21 Manganese,total Concentration
El 0
(7439-96-5) Mass
22 Tin,total ❑ Concentration
-
(7440-31-5) Mass
23. Titanium,total ❑ ❑ Concentration
(7440-32-6) Mass
EPA Form 3510-2C(Revised 3-19) Page 24

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))1
Presence or Absence
(check one) Effluent Intake
(Optional)
Units
PollutantMaximum Long-Term
Believed Believed (specify) Maximum Daily Monthly Average Daily Number of Long-Term Number of
Present Absent Discharge Discharge Discharge Analyses Average Analyses
(required) (if available) (if available) Value
24. Radioactivity
Concentration
Alpha,total ❑ ❑ Mass
Concentration
Beta,total ❑ ❑ Mass
Concentration
Radium,total ❑ ❑ Mass
Concentration
Radium 226,total ❑ ❑ Mass
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 25

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))'
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
1. Asbestos ❑ ❑
2. Acetaldehyde D ❑
3. Allyl alcohol ❑ ❑
4. Allyl chloride ❑ ❑
5. Amyl acetate ❑ ❑
6. Aniline ❑ ❑
7. Benzonitrile ❑ ❑
8. Benzyl chloride ❑ ❑
9. Butyl acetate ❑ ❑
10. Butylamine ❑ ❑
11. Captan ❑ 0
12. Carbaryl 0 0
13. Carbofuran ❑ 0
14. Carbon disulfide ❑ 0
15. Chlorpyrifos ❑ 0
16. Coumaphos ❑ ❑
17. Cresol ❑ 0
18. Crotonaldehyde 0 0
19. Cyclohexane ❑ 0
EPA Form 3510-2C(Revised 3-19) Page 27

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Available Quantitative Data
Believed Believed Reason Pollutant Believed Present in Discharge (specify units)
Present Absent
20. 2,4-D(2,4-dichlorophenoxyacetic acid) ❑ ❑
21. Diazinon ❑ ❑
22. Dicamba ❑ ❑
23. Dichlobenil ❑ ❑
24. Dichlone 0 ❑
25. 2,2-dichloropropionic acid 0 ❑
26. Dichlorvos ❑ ❑
27. Diethyl amine ❑ ❑
28. Dimethyl amine ❑ ❑
29. Dintrobenzene 0 ❑
30. Diquat ❑ ❑
31. Disulfoton ❑ ❑
32. Diuron ❑ ❑
33. Epichlorohydrin ❑ ❑
34. Ethion ❑ ❑
35. Ethylene diamine ❑ ❑
36. Ethylene dibromide ❑ ❑
37. Formaldehyde ❑ ❑
38. Furfural ❑ ❑
EPA Form 3510-2C(Revised 3-19) Page 28

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))1
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed g (specify units)
Present Absent
39. Guthion 0 ❑
40. Isoprene ❑ ❑
41. Isopropanolamine ❑ ❑
42. Kelthane ❑ ❑
43. Kepone ❑ ❑
44. Malathion ❑ ❑
45. Mercaptodimethur ❑ ❑
46. Methoxychlor ❑ ❑
47. Methyl mercaptan ❑ ❑
48. Methyl methacrylate ❑ ❑
49. Methyl parathion ❑ ❑
50. Mevinphos ❑ ❑
51. Mexacarbate ❑ ❑
52. Monoethyl amine ❑ ❑
53. Monomethyl amine ❑ ❑
54. Naled ❑ ❑
55. Naphthenic acid ❑ ❑
56. Nitrotoluene ❑ ❑
57. Parathion ❑ ❑
EPA Form 3510-2C(Revised 3-19) Page 29

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 122.21(g)(7)(vii))'
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed (specify units)
Present Absent
58. Phenolsulfonate ❑ ❑
59. Phosgene ❑ ❑
60. Propargite ❑ ❑
61. Propylene oxide ❑ ❑
62. Pyrethrins ❑ ❑
63. Quinoline ❑ ❑
64. Resorcinol ❑ ❑
65. Strontium ❑ ❑
66. Strychnine ❑ 0
67. Styrene ❑ ❑
68. 2,4,5-T(2,4,5-trichlorophenoxyacetic ❑ ❑
acid)
69. TDE(tetrachlorodiphenyl ethane) ❑ ❑
70 2,4,5-TP[2-(2,4,5-trichlorophenoxy) 0 ❑
propanoic acid]
71. Trichlorofon ❑ ❑
72. Triethanolamine ❑ ❑
73. Triethylamine ❑ ❑
74. Trimethylamine ❑ ❑
75. Uranium ❑ ❑
76. Vanadium ❑ ❑
EPA Form 3510-2C(Revised 3-19) Page 30

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE D.CERTAIN HAZARDOUS SUBSTANCES AND ASBESTOS(40 CFR 12221(g)(7)(vii))'
Presence or Absence
Pollutant (check one) Reason Pollutant Believed Present in Discharge Available Quantitative Data
Believed Believed g (specify units)
Present Absent
77. Vinyl acetate ❑ ❑
78. Xylene 0 0
79. Xylenol 0 0
80. Zirconium ❑ 0
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 31

This page intentionally left blank.

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0035670 Skyco WTP 001 OMB No.2040-0004
TABLE E.2,3,7,8 TETRACHLORODIBENZO P DIOXIN(2,3,7,8 TCDD)(40 CFR 122.21(g)(7)(viii))
TCDD Presence or
Congeners Absence
Pollutant (check one) Results of Screening Procedure
Used or
Manufactured Believed Believed
Present Absent
2,3,7,8-TCDD ❑ ❑
EPA Form 3510-2C(Revised 3-19) Page 33

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