NC0006190_Inspection_20190417

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Mr. Everette Owens
South Fork Industries, Inc.
Post Office Box 742
Maiden, North Carolina 28650
Dear Mr. Owens:
NORTH CAROLINA
Environmental Quality
17 April 2019
Subject: Toxicity Test Results
South Fork Industries/Maiden WWTP
NPDES Permit No. NC0006190
Catawba County
Enclosed is a copy of the toxicity test results relative to the samples collected at the subject facility on March 12 and 14,
2019, by Mr. Wes Bell of this Office. Effluent samples were collected for use in a chronic Ceriodaphnia dubia multi -
concentration toxicity test. The test Passed utilizing these samples.
The report should be self-explanatory; however, should you have any questions concerning this report, please do
not hesitate to contact Ms. Carol Hollenkamp at [phone] and/or Mr. Bell at [phone], or via email at
carol.hollenkampgncdenr.gov and wes.bellgncdenr.gov.
Sincerely,
DocuSigned by:
A14CC681 AF27425...
W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
Enclosure:
Toxicity Test Results
D Q
� North Carolina Department of Environmental Quality I Division of Water Resources
Mooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
NORTH CAROLINA
Da"MoM a enWmn�bl mwnq 704,663.1699

Division of Water Resources
April 17, 2019
MEMORANDUM
To: Corey Basinger
Water Quality Regional Operations, MRO
Through: Cindy A. Moore C;,**"
Supervisor, Aquatic Toxicology Branch (ATB)
From: Carol Hollenkamp��`�
Quality Assurance Officer, Aquatic Toxicology Branch (ATB)
Subject: Whole effluent toxicity test results
South Fork Industries, Inc.
NPDES Permit # NC0006190/001
Catawba County
The aquatic toxicity test using flow -proportional composite samples of effluent discharged from
the South Fork Industries, Inc. has been completed. South Fork Industries, Inc. has a permitted
effluent discharge of 1.1 million gallons per day (MGD) entering Clark Creek (7Q10 of 12 CFS).
Whole effluent samples were collected on March 12 and March 14 by Wes Bell and facility
representatives James Rhyne and Donald Burkey Jr. for use in a chronic Ceriodaphnia dubia
multi -concentration toxicity test. The test passed. Toxicity test information follows.
Test Type 3-Brood Ceriodaphnia dubia chronic multiconcentration
Test Result Pass (ChV = 16.97%)
Test Concentration 0, 3, 6, 12, 24, 48% (12% is permit limit)
Control Survival 100%
Control Mean Reproduction
Test Treatment Survival
Treatment Mean Reproduction
First Sample pH
First Sample Conductivity
First Sample Total Residual Chlorine
Second Sample pH
Second Sample Conductivity
Second Sample Total Residual Chlorine
31.8 neonates
100%
27.6 neonates at 12%; 19.3 neonates at 24%
8.12 SU
1342 micromhos/cm
<0.1 mg/L
8.11 SU
1500 micromhos/cm
<0.1 mg/L
Test results for the above samples indicate that the effluent would not be predicted to have
water quality impacts. These samples were split and tested by R & A Laboratories. The chronic
Ceriodaphnia dubia pass/fail test run by R & A Laboratories also resulted in a pass with a ChV of
16.97%. Please contact us if you have any questions or if further effluent toxicity monitoring is
desired. We may be reached at [phone].
Basin: Catawba
cc: Wes Bell (MRO)