20110089 Ver 3_More Info Letter_20140624

,A
RMENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
June 24, 2014
Mr. Pete Oakes
Hydac Technology Corporation
P.0 Box 22050
Lehigh Valley, PA 18002
Subject: Hydac Technology Corporation - Stormwater Management Plan Approval
Dear Mr Oakes:
John E, Skvarla, III
Secretary
DWR # 11 -0089
Lincoln County
On April 5, 2011, the NC Division of Water Quality (DWQ) issued a 401 Water Quality Certification (WQC)
Number 3821 (now 3890) to Airlie Industrial Park (Phase II) to impact 149 linear feet of unnamed stream to
Forney Creek in Lincoln County. As part of that 401, new development projects, such as this addition for
Hydac Technology Corporation, were required to develop a stormwater management plan.
In order to meet the above certifications' conditions, a stormwater management plan (SMP) was received
by the DWR on May 22, 2014. The SMP plan has been reviewed and satisfies the stormwater management
conditions of the 401 Water Quality Certification. This approval requires you to follow the conditions listed
in the General Water Quality Certification for the project and the additional conditions listed below
1 The SMP approved by the DWQ including a Sand Filter, all associated stormwater conveyances,
all inlet and outlet structures, and the grading and drainage patterns must be maintained in
perpetuity. No changes to the structural stormwater plan shall be made without written
authorization from the DWR. The stormwater management structures shall have maintenance
access and at least a 10 -foot drainage easement on each side to allow for the ability to maintain
the structures and to perform corrective actions. The stormwater easements shall be deed
recorded to provide protection of the structures from potential alterations by future property
owners.
2. Operation and Maintenance of BMP: Maintenance activities for the proposed SMP listed in
No.1 above shall be performed in accordance with the notarized operation and maintenance
(0 &M) agreement signed by Mr. Thomas Thielen on March 10, 2014. The O &M agreement
must transfer with the sale of the land or transfer with the ownership or responsibility for the
BMP facility. The DWR must be notified promptly of any transfer
Division of Water Resources - 401 & Buffer Permitting Unit
1650 Mad Service Center, Raleigh, North Carolina 27699 -1650
Location, 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone [phone] \ FAX 919 - 807 -6494
Internet vvww ncwaterquality org
An Equal Opportunity \ Affirmative Action Employer — Made in part by recycled paper

Mr. Pete Oakes
DWR # 11 -0089
Page 2 of 2
Thank you for your attention to this matter. If you have any questions, please contact Mr. Boyd DeVane at
919 -807 -6373.
Sincerely,
Karen Higgins, Supervisor
401 & Buffer Permitting Unit
cc: USACE Asheville Regulatory Field Office
Alan Moseley (amoseley @schondros.com) — email copy
DWR MRO 401 files
DWR 401 & Buffer Permitting Unit — file copy