NC0043532_Regional Office Historical File Pre 2018 (2)

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Michael F. Easley, Governor
North CWilliam G. Ross Jr., Secretary
Noarolina Department of Environment and Natural Resources
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Alan W. Klimek, P. E. Director
Division of Water Quality
Coleen H. Sullins; Deputy Director
Division of Water Quality
July 30, 2003
The Honorable Joyce Little
Town of Oakboro
Post Office Box 610
Oakboro, North Carolina 28129
Subject: Toxicity Test Results
Oakboro WWTP
NPDES Permit No. NCO043532
Stanly County, NC
Dear Mayor Little:
Enclosed is a copy of the toxicity test results relative to the inspection conducted at the
subject facility on July 8, 2003 by John Lesley of this Office. Effluent Samples were collected on
July 8 and 11, 2003 by Division staff for use in a chronic Ceriodaphnia dubia pass/fail toxicity
test. The test utilizing these samples resulted in a pass.
The report should be self-explanatory; however, should you have any questions concerning
this report, please do not hesitate to contact Mr. Lesley or me at [phone].
Sincerely,
C�
rD. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Central Files
Kevin Bowden, Aquatic Toxicology Unit
Stanly County Health Department
N. C. Division of Water Quality Mooresville Regional Office 919 North Main Street Mooresville NC 28115 [phone]
NCDENR
Customer Service
1-877-623-6748

Oakboro WWTP
NPDES Permit No. NC0043532
Page 2
Whole effluent samples were collected on July 8 and 11, 2003 by John Lesley for use in a
chronic Ceriodaphnia dubia pass/fail toxicity test. Oakboro WWTP has an effluent discharge
permitted at 0.9 MGD entering Rocky River (7Q10 of 29 CFS). The test using these samples
resulted in a pass. Toxicity test information follows:
Test Type
Test Concentration
Test Result
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 pass/fail
4.6% sample
Pass
100%
19.2 neonates
100%
23.2 neonates
6.63 SU
257 micromhos/cm
<0.0052 mg/l
6.58 SU
324 micromhos/cm
<0.0052 mg/l
Test results for these samples indicate that the effluent would not be predicted to have
water quality impacts on the receiving stream.

-4Nj
Division of Water Quality
- Aquatic Toxicology Unit
July 23, 2003
MEMORANDUM
To: Rex Gleason
Water Quality Supervisor, MRO
Through: Matt Matthews r r
Supervisor, Aquatic Toxicology Unit
From: Sandy Mort
Quality Assurance Officer, Aquatic Toxicology Unit
Subject: Whole effluent toxicity test results
Oakboro WWTP
NPDES Permit # NCO043532/002
Stanly County
HC DEPT. OF ENVRONME1t1Y
AND NATURAL RESOURCES
C30O SVILLE R 7GIOHAL OFFICE,
hp C,
-JUL 2 5 2003
1
MIAsP{a�
The aquatic toxicity test using 24-hour composite samples of effluent discharged from Oakboro
WWTP has been completed. Oakboro WWTP has an effluent discharge permitted at 0.9 million
gallons per day (MGD) entering Rocky River (7Q10 of 29 CFS). Whole effluent samples were
collected on July 8 and 11 by John Lesley and facility personnel for use in a chronic Ceriodaphnia
dubia pass/fail toxicity test. The test using these samples resulted in a pass. 'Toxicity test
information follows.
Test Type
Test Concentrations
Test Result
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 pass/fail
4.6% sample
Pass
100%
19.2 neonates
100%
23.2 neonates
6.63 SU
257 micromhos/cm
<0.0052 mg/L
6.58 SU
324 micromhos/cm
<0.0052 mg/L
Test results for these samples indicate that the effluent would not be predicted to have water quality
impacts on receiving water. Please contact us if further effluent toxicity monitoring is desired. We
may be reached at [phone].
Basin: YAD13
cc: Central Files
Environmental Sciences Branch Water Quality Section

QF \P4 Michael F. Easley
Governor
C� 7 William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
p `C Alan W. Klimek, P.E., Director
Division of Water Quality
December 20, 2002
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Ms. Joyce Little, Mayor
Town of Oakboro
PO Box 610
Oakboro, North Carolina 28129
Subject: NOTICE OF DEFICIENCY
Effluent Toxicity Testing
NPDES Permit No. NCO043532L001
Town of Oakboro WWTP
Stanly County
Dear Mayor Little:
7;
DEC 2 3 2002
Pw
This is to inform you that the Environmental Sciences Branch has not received your toxicity self -
monitoring report form for the month of October 2002 (Outfall 001). We have received a toxicity test result
for October 2002 (Outfall 002), but not for Outfall 001. This is in violation of Title 15A of the North
Carolina Administrative Code, Chapter 2, Subchapter 2B, Section .0506 (a)(1)(A) which states that "monthly
monitoring reports shall be filed no later than 30 days after the end of the reporting period for which the
report is made."
Based on information contained in your NPDES Permit and upon relocation to the Rocky River,
Outfall 001 will be used as a gravity discharge only in cases of emergency when pump station or force main
failure precludes discharge to Outfall 002.
Information contained on your October 2002 DMR indicates that a toxicity test was conducted
during the month of October (Outfall 002); however, an Aquatic Toxicity Test Form was not received by the
Environmental Sciences Branch within the 30 day reporting period for Outfall 001 (gravity outfall).
.Please submit an Aquatic Toxicity self -monitoring report form for Outfall 001 labeled "No
Flow" to our office by January 11, 2003 or notify this office of any problem which may have prevented the
report from being received on time. Failure to submit the October 2002 "No Flow" test form by the date
specified above will result in the issuance of a Notice of Violation. Additional reporting and/or monitoring
' a ^y subject you to a civil penalty assessment.
violations within a tweive(12, month m 1 ,.,..
The reverse side of this Notice contains a summary of important toxicity monitoring and reporting
requirements. Please read this one page summary and if you have any questions concerning this Notice
please contact Mr. Kevin Bowden with the Aquatic Toxicology Unit at [phone].
cc: iRex;Gleason-Mooresville Regional Office
John Lesley -Mooresville Regional Office
Aquatic Toxicology Unit Files
Central Files
Sincerely,
• 4
verton
Assistant Water Quality Section Chief
for Environmental Sciences
C-DERR
Customer Service
Environmental Sciences Branch 1621 Mail Service Center Raleigh, NC 27699-1621 [phone]

WHOLE EFFLUENT TOXICITY MONITORING AND REPORTING INFORMATION
➢ The following items are provided in an effort to assist you with identifying critical and sometimes overlooked toxicity
testing and reporting information. Please take time to review this information. The items below do not address or include
all the toxicity testine and reporting requirements contained in your NPDES Permit. If you should have any questions
about your toxicity testing requirement, please contact Mr. Kevin Bowden with the Aquatic Toxicology Unit at (919) 733-
2136 or another Unit representative at the same number.
➢ The permittee is responsible for ensuring that toxicity testing is conducted according to the permit requirement and that
toxicity report forms are appropriately filed.
➢ The reporting of whole effluent toxicity testing data is a dual requirement. All toxicity test results must be entered (with the
appropriate parameter code) on your monthly Discharge Monitoring Report which is submitted to:
North Carolina Division of Water Quality
Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
IN ADDITION
Toxicity test data (original "AT" form) must be submitted to the following address:
North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
➢ Toxicity test results shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the
reporting period (eg, January test result is due by the end of February).
➢ Toxicity test condition language contained in your NPDES permit may require use of multiple concentration toxicity testing
upon failure of any single quarterly toxicity test. If the initial pass/fail test fails or if the chronic value is lower than the
permit limit, then at least two multiple concentration toxicity tests (one per month) will be conducted over the following two
months. As many analyses as can be completed will be accepted. If your NPDES permit does not require use of multiple
concentration toxicity testing upon failure of any single quarterly test, you may choose to conduct either single
concentration toxicity testing or multiple concentration toxicity testing per the Division's WET enforcement initiatives
effective July 1, 1999. Follow-up multiple concentration toxicity testing will influence the Division's enforcement response.
➢ Toxicity testing months are specified by the NPDES Permit, except for NPDES Permits which contain episodic toxicity
monitoring requirements (eg, if the testing months specified in your NPDES permit are March, June, September, and
December, then toxicity testing must be conducted during these months).
➢ Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing this monthly test requirement, the permittee will
revert to the quarterly months specified in the permit. Please note that your permit may or may not contain this language.
➢ If your NPDES Permit specifies episodic monitoring and your facility does not have a discharge from January 1-June 30,
then you must provide written notification to the Environmental Sciences Branch by June 30 that a discharge did not occur
during the first six months of the calendar year.
➢ If you receive notification from your contract laboratory that a test was invalidated, you should immediately notify the
Environmental Sciences Branch at [phone] and provide written documentation indicating why the test was
invalidated and the date when follow-up testing will occur.
➢ If your facility is required to conduct toxicity testing during a month in which no discharge occurs, you should complete the
information block located at the top of the AT form indicating the facility name, permit number, pipe number, county and
the month/year of the subject report. You should also write "No Flow" on the AT form, sign the form and submit following
normal procedures.
➢ The Aquatic Toxicity Test forms shall be signed by the facility's Operator in Responsible Charge (ORC) except for facilities
which have not received a facility classification. In these cases, a duly authorized facility representative must sign the AT
forma The AT form must also be signed by the performing lab supervisor.
➢ To determine if your AT test forms were received on time by the Division of Water Quality, you may consider submitting
your toxicity test results certified mail, return receipt requested to the Environmental Sciences Branch.