NCG030543_2018 ROS APPROVAL_20180504

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
Unison Engine Components — GE Aviation
Attn: Michael Meguiar
502 Sweeten Creek Industrial Park Road
Asheville, NC 28803
May 4, 2018
Subject: NPDES Stormwater Permit
Permit No. NCG030543
Representative Outfall Status Request
Unison Engine Components - GE Aviation
Buncombe County
Dear Mr. Meguiar:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
WILLIAM E. VINSON, JR.
Interim Director
The Asheville Regional Office staff have reviewed your request dated March 16, 2018, for a
determination that stormwater discharge outfall (SDO) 001 be granted representative outfall status for
stormwater outfalls 002 and 005. Based on the information and maps provided and a site inspection on
February 20, 2018, we are approving this request. In accordance with 40 CFR §122.21(g)(7), you are
authorized to sample outfall number 001 as a representative outfall. This approval is effective with the
next sampling event. We also want to remind you that the permit still requires Qualitative Monitoring be
performed at all SDOs, regardless of representative status.
Please remember that any actions you initiate in response to benchmark exceedances as directed in the
tiered response provisions of your permit must address all drainage areas represented by 001, where
appropriate.
Please append this letter to your Stormwater Pollution Prevention Plan (SPPP) or permit to document that
representative outfall status has been approved. If changes in drainage areas, structures, processes,
storage practices, or other activities occur that significantly alter the basis of this approval, representative
outfall status may no longer be valid. You should either resume sampling at all SDOs, or reapply to this
office for representative outfall status based on updated information. If you have any questions or
comments concerning this letter, please contact Shawna Riddle or me at 828-296-4500.
Sincerely,
Stanley E. Aiken, Gn
Regional Engineer
Land Quality Section
Enclosure: Inspection Report
ec: Bethany. Geor oig lliasLa)ncdenr.gov, Environmental Engineer
Lucy.Crocker@e� com, Lead EHS Specialist, GE Aviation
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
2090 US 70 Highway I Swannanoa, NC 28778-8211
828 296 4500 T

Compliance Inspection Report
Permit: NCG030543 Effective: 11/16/17 Expiration: 10/31/18 Owner: Unison Engine Components Inc
SOC: Effective: Expiration: Facility: Unison Engine Components Inc
County: Buncombe 401 Sweeten Creek Industrial Park
Region: Asheville
Asheville NC 28803
Contact Person: Jgff 6awman- Title: Phone: [phone]
Directions to Facility:
System Classifications:
Primary ORC:
Secondary ORC(s):
Certification: Phone:
On -Site Representative(s):
On-site representative Lucy Crocker
Related Permits:
Inspection Date: 02/20/2018 EntryTime: 11:OOAM Exit Time: 12:45PM
Primary Inspector: Shawna Riddle �v Phone:
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Metal Fabrication Stormwater Discharge COC
Facility Status: Compliant F1 Not Compliant
Question Areas:
0 Storm water
(See attachment summary)
Page: 1

Permit: NCG030543 Owner - Facility: Unison Engine Components Inc
Inspection Date: 02/20/2018 Inspection Type : Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Met with Lucy Crocker for the inspection. Inspection was to determine representative outfall status for the Building 401
NCG030543 permit. The SPPP is current and monitoring is being conducted as required. Representative outfall status will
be approved for this site. You are authorized to sample Outfall 001 as a representative outfall for outfalls 002 and 005. This
approval is effective with the next sampling event.
Page: 2

Permit: NCGO30543 Owner - Facility: Unison Engine Components Inc
Inspection Date: 02/20/2018 Inspection Type : Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan?
❑ ❑ ❑
# Does the Plan include a General Location (LISGS) map?
❑ ❑ ❑
# Does the Plan include a "Narrative Description of Practices"?
0 ❑ ❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
N ❑ ❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
0 ❑ ❑ ❑
# Has the facility evaluated feasible alternatives to current practices?
N ❑ ❑ ❑
# Does the facility provide all necessary secondary containment?
0 ❑ ❑ ❑
# Does the Plan include a BMP summary?
■ ❑ ❑ ❑
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
0 ❑ ❑ ❑
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
N ❑ ❑ ❑
# Does the facility provide and document Employee Training?
N ❑ ❑ ❑
# Does the Plan include a list of Responsible Party(s)?
0 ❑ ❑ ❑
# Is the Plan reviewed and updated annually?
0 ❑ ❑ ❑
# Does the Plan include a Stormwater Facility Inspection Program?
N ❑ ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
E ❑ ❑ ❑
Comment:
Qualitative Monitoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring semi-annually? N ❑ ❑ ❑
Comment:
Analytical Monitoring Yes No NA NE
Has the facility conducted its Analytical monitoring? 0 ❑ ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ N ❑
Comment:
Permit and Outfalls
Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? ❑ ❑ ❑
# Were all outfalls observed during the inspection? ❑ ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ 1:10 ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ ❑ N ❑
Comment:
Page: 3