NC0089109_Bioassay Compliance Inspection Report_20230725

SENT VIA ELECTRONIC MAIL ONLY: NO HARD COPY WILL BE MAILED.

July 25, 2023

William White
Befesa Zinc Metal LLC
Email: [e-mail]

SUBJECT: Bioassay Compliance Inspection Report
Befesa Zinc Metal, LLC
NPDES WW Permit No. NC0089109
Rutherford County

Dear Permittee:

The North Carolina Division of Water Resources conducted a Bioassay Compliance Inspection of Befesa Zinc
Metal on July 11, 2023 and July 13, 2023. This inspection was conducted to verify that the facility is operating
in compliance with the conditions and limitations specified in NPDES WW Permit No. NC0089109. The test
resulted in a fail from both our Bioassay Laboratory in Raleigh and ETT Environmental. Findings noted during
this inspection are provided in the enclosed copy of the inspection report.

If you should have any questions, please do not hesitate to contact Lauren Armeni with the Water
Quality Regional Operations Section in the Asheville Regional Office at 828-296-4667 or via email at
[e-mail].

Sincerely,

G. Landon Davidson, P.G., Regional Supervisor
Water Quality Regional Operations Section
Asheville Regional Office
Division of Water Resources, NCDEQ

ATTACHMENTS: Inspection Report

Ec: Laserfiche
DocuSign Envelope ID: E64D6BEF-77D9-4490-8DDD-F2B694E82F7F
EPA
United States Environmental Protection Agency
Washington, D.C. 20460
Water Compliance Inspection Report
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 N 52 NC0089109 23/07/11 B S31112171819 20
21 66
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ----------------------Reserved-------------------
D N67707172 73 74 75 80
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
Befesa Zinc Metal, LLC
484 Hicks Grove Rd
Mooresboro NC 28114
Entry Time/Date Permit Effective Date
Exit Time/Date Permit Expiration Date
08:00AM 23/07/11 20/07/01
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
Other Facility Data
09:00AM 23/07/11 23/07/31
Name, Address of Responsible Official/Title/Phone and Fax Number
William White,484 Hicks Grove Rd Mooresboro NC 28114//704-692-3476/Contacted
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Other
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s)Agency/Office/Phone and Fax Numbers Date
Lauren E Armeni DWR/ARO WQ/828-296-4500/
Rachel Rose DWR/ARO WQ/828-296-4500/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
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7/25/2023
7/25/2023
7/25/2023
NPDES yr/mo/day
23/07/11
Inspection Type
B3111218
1
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
On July 11, 2023 and July 13, 2023, Lauren Armeni and Rachel Rose, with the Asheville Regional
Office, conducted Bioassay Compliance Inspections at Befesa Zinc Metal. Whole Effluent samples
were split with the assistance of Blake Hoyle and Bryon Shull for use in a chronic Ceriodaphnia dubia
pass-fail toxicity test. The toxicity test failed for both the Division's sample (analyzed by our Bioassay
Laboratory in Raleigh) and Befesa Zinc's sample (analyzed by ETT Environmental). Toxicity test
information follows:
Test Type: 3-Brood Ceriodaphnia dubia chronic pass-fail
Test Result: Fail
Test Concentration: 0.9%
Control Survival: 100%
Control Mean Reproduction: NA (test terminated early due to treatment mortality)
Test Treatment Survival: 0%
Treatment Mean Reproduction: 0 neonates
First Sample pH: 6.41 SU
First Sample Conductivity: 45.3 mS/cm
First Sample Total Residual Chlorine: <0.5 mg/L
Second Sample pH: 7.14 SU
Second Sample Conductivity: 43.3 mS/cm
Second Sample Total Residual Chlorine: <0.5 mg/L
Test results from the above samples indicate that the effluent would be predicted to have water
quality impacts. Per NPDES Permit NC0089109, Part I, Section (A.) (2.), multiple-concentration toxicity
testing should be performed at a minimum in each of the two months following the failed toxicity test.
NC0089109 17 (Cont.)
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DocuSign Envelope ID: E64D6BEF-77D9-4490-8DDD-F2B694E82F7F
Permit:NC0089109
Inspection Date:07/11/2023
Owner - Facility:
Inspection Type:
Befesa Zinc Metal, LLC
Bioassay Compliance
Other Yes No NA NE
See summary for inspection details.Comment:
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DocuSign Envelope ID: E64D6BEF-77D9-4490-8DDD-F2B694E82F7F