NC0024937_Compliance Evaluation Inspection_20200915 (2)

Division of Water Resources
September 10, 2020
MEMORANDUM
To: Corey Basinger
Water Quality Regional Operations, MRO
Through: Cindy A. Moore OL
Supervisor, Aquatic Toxicology Branch (ATB)
From: Lorimar S. Henning
Environmental Specialist 11 Aquatic Toxicology Branch (ATB)
Subject: Whole effluent toxicity test results
Sugar Creek WWTP
NPDES Permit # NCO024937/001
Mecklenburg County
The aquatic toxicity test using flow -proportional composite samples of effluent discharged from
the Sugar Creek WWTP has been completed. Sugar Creek WWTP has a permitted effluent
discharge of 20 million gallons per day (MGD) entering Little Sugar Creek (7Q10 of 3.4 CFS).
Whole effluent samples were collected on September 1 and September 3 by Wes Bell and
facility representative Daniel Messenger for use in a chronic Ceriodaphnia dubia pass -fail toxicity
test. The test passed. Toxicity test information follows.
Test Type
Test Result
Test Concentrations
Control Survival
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
3-Brood Ceriodaphnia dubia chronic pass -fail
Pass
90%
100%
28.2 neonates
100%
26.8 neonates
7.38 SU
426 micromhos/cm
0.03 mg/L
7.46 SU
382 micromhos/cm
0.04 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 ETT Environmental, Inc. The
chronic Ceriodaphnia dubia pass/fail test run by ETT resulted in a pass. 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)

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Ms. Jacqueline A. Jarrell, P.E.
Operations Chief
Environmental Management Division
Charlotte Water
5100 Brookshire Blvd.
Charlotte, North Carolina 28216
Dear Ms. Jarrell:
NORTH CAROLINA
Environmental Quality
September 15, 2020
Subject: Compliance Bio-monitoring Inspection
Sugar Creek WWTP
NPDES Permit No. NCO024937
Mecklenburg County
Enclosed is a copy of the Compliance Bio-monitoring Inspection Report for the inspection conducted at the subject facility
on September 1, 2020, by Mr. Wes Bell of this Office. In addition, this report includes a copy of the toxicity test results relative
to the split samples collected at the subject facility on September 1 and 3, 2020 by DWR and Charlotte Water Staff. Effluent
samples were collected for use in a chronic Ceriodaphnia dubia Pass/Fail toxicity test. The test Passed utilizing these samples.
Please inform the facility's Operator -in -Responsible Charge (ORC) of our findings by forwarding a copy of the enclosed report.
The report should be self-explanatory; however, should you have any questions concerning this report, please do
not hesitate to contact Mr. Bell at [phone] or at [e-mail].
Sincerely,
DocuSigned by:
A14CC681 AF27425...
W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, DEQ
Enclosure
Inspection Report
Toxicity Test Results
D-;� North Carolina Department of Environmental Quality I Division of Water Resources
EMooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
NOR7H ORROLINA i
kmrl l m EnNromi W uwi` /`� 704.663.1699