NC0022187_Technical Ass. Visit_20150520

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North Carolina Department of Environment and Natural Resources
Pat McCrory Donald van der Vaart
Governor Secretary
May 20, 2015
Ms. Jennifer L. Bothwell, Environmental Coordinator
Motiva Enterprises, LLC RECEIVED/DENR/DWR
35-31 Talcottville Road
Vernon, CT 06066
MAY 262015
Subject: Technical Assistance visit Water Quality
Motiva Charlotte — North Terminal WWTP Permitting Section
NPDES Permit NC0022187
Mecklenburg County
Dear Ms. Bothwell:
Enclosed please find a summary of the technical assistance visit conducted by Ms. Marcia Allocco
and Mr. Derek Denard at the subject facility on April 22, 2015. It was a pleasure meeting with Mr.
John Bates, Mr. James Lintz, and yourself to discuss your concerns regarding compliance with the
NPDES permit, to provide technical assistance, and to review the next steps during your permit
renewal as noted in the enclosed report.
The enclosed report should be self-explanatory; however, should you have any questions please do
not hesitate to contact me at [phone] or [e-mail].
Sincerely,
Marcia Allocco, MS
Environmental Senior Specialist
Water Quality Regional Operations
Division of Water Resources
Enclosures: Inspection Report
cc: Wastewater Branch
MSC 1617 — Central files basement
R. Rozzelle, MCWQP
Mooresville Regional Office
Location:610 East Center Ave.,Suite 301 Mooresville,NC 28115
Phone:[phone]\Fax:[phone]\Customer Service:1-877-623-6748
Internet http://portal.ncdenr.org/web/wq
An Equal Opportunity t Affirmative Action Employer-30%Recycled, 0%Post Consumer paper

United States Environmental Protection Agency Form Approved.
EPA Washington,D.C.20460 OMB No.2040-0057
Water Compliance Inspection Report 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 Nil 2 ISI 3 1 NC0022187 111 12 1 15/04 117 18121 19 11.1 201 I
21111111 11111111111 11111111111111 11111111111 r6
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA — Reserved
6711.0 ( 701, I li
71 �r� LJ 1 72 u I 731 I 174 751 1 1 1 1 1 1 1 180
LJ Section B:Facility Data
Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number) 10:00AM 15/04/22 11/03/01
Paw Creek Terminal
410 Tom Sadler Rd Exit Time/Date Permit Expiration Date
12:30PM 15/04/22 15/06/30
Paw Creek NC 28130
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Nicola A Ellis,2232 Ten Ten Rd Apex NC 275021/919-387-5764/
No
Section C:Areas Evaluated During Inspection(Check only those areas evaluated)
Operations&Maintenance • Facility Site Review
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
Marcia Allocco MRO WQ//704-663-1699 Extj2204/ laO l i
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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t
NPDES yr/mo/day Inspection Type (Cont.) 1
31 NC0022187 111 121 15/04/22 1 17 18 ,
ai
Section D:Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
A technical assistance visit was conducted by staff from the Water Quality Regional Operations
section (Mooresville Office)and the NPDES wastewater branch because of recent noncompliance with
the daily maximum manganese permit limit.
The following items were discussed during the visit:
• Reviewed site layout including"spring"within containment area that may be source of elevated
manganese levels
• Reclassification of Gum Branch as a WS-IV stream; reason behind manganese permit limit.
• Reviewed proposed removal of iron and manganese water quality standards as part of triennial
review
• Reviewed current permit limits and noted that review would be made during permit renewal to
ascertain if any daily maximum permit limits could be applied as monthly averages instead of current
daily maximum limits. Any actions would depend on reasonable potential analysis and Division policy
in how the analysis to translated into permit limits
• Reviewed data supplied by Motiva regarding natural occurrence of manganese in groundwater
• Discussed polyacrylamides(PAMS)as an option to treat stormwater to reduce manganese levels;
provided information regarding NCSU professor who might be contacted as a consultant
• Discussed"filter bags"as another option to remove particulates/manganese
• Reviewed sampling options(multiple samples during discharge events)to determine daily maximum
concentrations
The following action items are to be completed following the site visit:
• M.Allocco to follow-up on possible suppliers of PAMS; e-mail sent 4/22/15
• M.Allocco to research and communicate to permittee status of manganese monitoring by other
NPDES permittees that discharge to Gum Branch; e-mail sent 4/22/15
• M.Allocco to inquire if stormwater classes could be taken for PC operator continuing education
credit; e-mail sent 4/30/15
• D. Denard to follow-up on permit related issues as part of permit renewal
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