NC0021121_More Information Received_20180918

•
Po Box70
• Mount Airy,N C 27030
• Phone [phone]
• Fax [phone]
CityofMtAiIyWWTP _ _._ _ ...
September 18, 2018
RECEIVE©/®ENR/DWR
Ms. Wren Thedford SEP 5 2018
NC DEQ/DWR/NPDES eater Resources
1617 Mail Service Center 0 Section
Raleigh,N.C. 27699-1617
Subject: NPDES Permit NC 0021121 Renewal
Dear Ms. Thedford,
The City of Mount Airy requested renewal of NPDES Permit NC 0021121 on
August 22, 2018. Enclosed please find the results along with page 10, Part D of the
permit application for the four parameters not included on the Pollutant Scan in
October 2015. The parameters are Antimony, Beryllium, Thallium, and total
phenolic compounds. If you have any questions or require further information,
please contact me at 336-786-3597.
Sincerely,
ej/141,-N-J
Chris Marion
WWTP ORC

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Mount Airy WWTP, NC0021121 Renewal Yadkin Pee-Dee
r SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has(or is required
to have)a pretreatment program,or is otherwise required by the permitting authority to provide the data,then provide effluent testing data for the following
pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each outfall through which
effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data collected
through analyses conducted using 40 CFR Part 136 methods. In addition,these data must comply with QA/QC requirements of 40 CFR Part 136 and
other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the blank rows provided below
any data you may have on pollutants not specifically listed in this form. At a minimum,effluent testing data must be based on at least three pollutant
scans and must be no more than four and one-half years old.
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE AVERAGE DAILY DISCHARGE
POLLUTANT Number ANALYTICAL ML/MDL
Conc. Units Mass Units Conc. Units Mass Units of METHOD
Samples
METALS(TOTAL RECOVERABLE),CYANIDE,PHENOLS,AND HARDNESS.
ANTIMONY <.025 MG/L <.025 MG/L 3 EPA 200.7 0.025
ARSENIC <.01 MG/L <.01 MG/L 3 EPA 200.7 0.01
BERYLLIUM <.001 MG/L <.001 MG/L 3 EPA 200.7 0.001
CADMIUM <.002 MG/L <.002 MG/L 3 EPA 200.7 0.002
CHROMIUM <.005 MG/L <.005 MG/L 3 EPA 200.7 .0.005
COPPER .014 MG/L .011 MG/L 3 EPA 200.7 0.005
LEAD <.01 MG/L <.01 MG/L 3 EPA 200.7 0.01
MERCURY 6.28 NG/L 4.6 NG/L 3 EPA 1631 E 0.5
NICKEL <.01 MG/L <.01 MG/L 3 EPA 200.7 0.01
SELENIUM <.01 MG/L <.01 MG/L 3 EPA 200.7 0.01
SILVER <.005 MG/L <.005 MG/L 3 EPA 200.7 0.005
THALLIUM <.005 MG/L <.005 MG/L 3 EPA 200.7 0.005
ZINC .092 MG/L .066 MG/L 3 EPA 200.7 0.01
CYANIDE <.01 MG/L <.01 MG/L 3 SM4500CNE- 0.01
1999
TOTAL PHENOLIC .006 MG/L .0053 MG/L 3 EPA 420.1 0.005
COMPOUNDS
HARDNESS(as CaCO3) 149 MG/L 67.7 MG/L 15 SM2340C 1997 1.0
Use this space(or a separate sheet)to provide information on other metals requested by the permit writer
EPA Form 3510-2A(Rev. 1-99). Replaces EPA forms 7550-6&7550-22. Page 10 of 22

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... RESEARdi : ANA[yTiCA[ Report of Analysis
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Client Sample ID: Plant Effluent Lab Sample ID: 55139-01
Site: City of Mt Airy WWTP Collection Date: 8/23/2018 10:00
Parameter Method Result Units Rep Limit Analyst Analysis Date/Time
Antimony,Total EPA 200.7 <0.005 mg/L 0.005 SK 8/27/2018
Beryllium,Total EPA 200.7 <0.001 mg/L 0.001 SK 8/27/2018
Phenols EPA 420.1 <0.005 mg/L 0.005 DW 9/14/2018
Thallium,Total EPA 200.7 <0.005 mg/L 0.005 SK 8/27/2018
NA=not analyzed
P.O.Box 473 106 Short Street Kernersville,North Carolina 27284 Tel:[phone] Fax:[phone] www.randalabs.com Page 1
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