NCG030218_DMr_Oct_20201125

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG030000
Date submitted 11/25/2020
CERTIFICATE OF COVERAGE NO. NCG030218 SAMPLE COLLECTION YEAR 2020
FACILITY NAME MMA Manufacturing SAMPLE PERIOD ❑Jan-June ❑July-Dec
COUNTY Henderson or ® Monthly1 October (month)
PERSON COLLECTING SAMPLES George Waechter
' -DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout EPNA
LABORATORYIBS Environmental Services Lab Cert.#275 0 ❑Zero-flow ❑Water Supply ❑SA
Comments on sample collection or analysis:
['Other
•
PLEASE REMEMBER TO SIGN ON PAGES 2 AND/OR 3 -
Part A:Stormwater Benchmarks and Monitoring Results
No discharge this period?2
pH' Non-Polar O&G/
Date Sample 24-hour rainfall Total Toxic
Outfall No. Collected) amount, Total Suspended Solids Standard Copper Lead Zinc Total Petroleum Organicss
(mo/dd/yr) Inches3 units Hydrocarbons
Benchmarks===> - - 100 mg/L or 50 mg/L4 6.0—9.0 0.007 mg/L 0.03 mg/L 0.067 mg/L 15 mg/L 1 mg/L
01 10/10/20 .25 <2.5 mg/L 6.1 <0.005 mg/L <0.005 mg/ 0.099 mg/L <5 N/A
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.
3 The 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.
See General Permit,Table 3 identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
'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: 11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
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."
Name(Print name)
Title(Print title)
(Signature) (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?2
Outfall No. Date Sample 24-hour rainfall
Collected' amount, Non-polar O&G/TPH by
(mo/dd/yr) Inches' EPA 1664(SGT-HEM) Total Suspended Solids pH
Benchmarks===> - - 15 mg/L 100 mg/L or 50 mg/L* 6.0—9.0 SU
N/A N/A N/A N/A N/A N/A
Footnotes from Part A also apply to this Part B
*See General Permit text,Table 5,identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Permit Date: 11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
Page 2 of 3

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.
FOR PART A 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 ❑NO
IF YES,HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑NO❑
REGIONAL OFFICE CONTACT NAME:
Mail an original and one 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 the re s' ificant penalties for submitting false information,including the possibility of fines and imprisonment for knowing violations."
/4 %a
(Signature of Per 'nee) (Date)
Permit Date: 11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
Page 3 of 3

US COMPLIANCE
November 25, 2020
Division of Water Quality
Attn: DWQ Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Stormwater Discharge Monitoring Report
MMA Manufacturing
305 W. King Street
East Flat Rock, NC 28726
To Whom It May Concern:
Please find the Stormwater Discharge Monitoring Report for Minute Man Anchors, Inc. located
at the address listed above. The samples were taken on October 10, 2020 and received on
October 30, 2020. Facility has been conducting inspections and sampling various areas around
the property to determine where zinc exceedances have been coming from and have been
working with Shawna Riddle at the regional office to try and determine next best steps. Facility
is continuing to investigate zinc exceedances and trying to meet benchmark limits.
If you have any questions, please feel free to contact me at your earliest convenience. I can be
reached at(952) 567-5630 or by email at [e-mail].
Sincerely,
Alexa Rinde
Environmental Specialist II
` RECEIVED
U.S. Compliance DEC 0 7 2020
Enclosures DEC 0 2020
CENTRAsL FILES
ON
cc: George Waechter— MMA Manufacturing cc)
ECTILE
888-897-8681 1520 Third Street, #100, Excelsior, MN 55331 I uscompliance.com