NC0031046_Compliance Report_20240718

Docusign Envelope ID:2044EFFF-1910-4101-92B0-DC28730A4E38
ROY COOPER _
Governor d C
ELIZABETH S.BISERr
Secretary •E .
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
July 18,2024
Angela Kolar
Colonial Pipeline Company
PO Box 1624
Alpharetta,GA 30009-9934
SUBJECT: Missing AT Forms
Whole Effluent Toxicity(WET)Testing
NPDES Permit No.NC0031046/001-005,NC0081469/001,and NCO031011/001
Colonial Pipeline
Guilford County
This is to inform you that a review of your NPDES permits found that aquatic toxicity testing(AT)forms had not
been reported to the Aquatic Toxicology Branch as required.Aquatic toxicity testing has a dual reporting
requirement and must be reported both on the eDMR and by sending AT forms to the Aquatic Toxicology Branch.
After contacting the facilities,all AT forms were submitted and the facilities are now in compliance.
Please ensure that future AT forms are submitted to the Aquatic Toxicology Branch at [e-mail]
within 30 days after the required testing period.
We encourage you to review this information;if it would be helpful to discuss this situation,please contact Molly
Nicholson at(919)743-8424 or [e-mail].
Sincerely,
r D1ocwu,Siggnedt^b1y.
?211F 45EB27436...
Chris Johnson,Environmental Program Manager
Division of Water Resources,NCDEQ
Attachment
cc: David Reedy(via email:[e-mail])
NCDEQ Winston-Salem Regional Office
ATB Enforcement File&Laserfiche
North Carolina Department of Environmental Quality I Division of Water Resources I Bio Lab
DE Q—Z-A� 4401 Reedy Creek Road 1 1621 Mail Service Center I Raleigh,North Carolina 27699-1621
uaumentn-11\� 919.743.8400

Docusign Envelope ID:2044EFFF-1910-4101-92B0-DC28730A4E38
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
testing and reporting requirements contained in your NPDES permit. If you should have any questions about your toxicity
testing requirement,please contact Molly Nicholson at(919)743-8424 or Cindy Moore at(919)743-8422.
➢ DATA SUBMITTAL: 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.
➢ 1)All toxicity test results must be entered(with the appropriate parameter code)on your monthly Electronic Discharge
Monitoring Report(eDMR)and,
➢ 2)Your Toxicity test data("AT"form)must be submitted to the Aquatic Toxicity Branch via:
Email to: [e-mail]
--OR--
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicity Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
• Toxicity test results shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting
ep riod(eg,January test result is due by the end of February).
• To determine if your AT test forms were received on time by the Division of Water Resources,you y consider submitting
,your toxicity test results certified mail,return receipt requested to the Water Sciences Section or email to the above address,
receiving e-confirmation.
• 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 form.
The AT form must also be signed by the performing lab supervisor.
➢ FAILED TESTS:
• 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.
➢ INVALID TESTS:
• If you receive notification from your contract laboratory that a test was invalidated,you should immediately notify the Water
Sciences Section at(919)743-8424 and provide written documentation indicating why the test was invalidated and the date
when follow-up testing will occur.
➢ TESTING MONTHS:
• 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).
EPISODIC MONTIORING:
• 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 Water Sciences Section by June 30 that a discharge did not occur during the first
six months of the calendar year.
➢ NO DISCHARGE:
➢ 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.
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources I Bin Lab
4401 Reedy Creek Road 1 1621 Mail Service Center I Raleigh,North Carolina 27699-1621
NORTH CAROUNA _
DW.m.mmem.—.10"1;\� 919.743.8400