20151229 Ver 1_Staff Comments_20160405

Homewood, Sue
From:Randall, Mike
Sent:Tuesday, April 05, 2016 11:10 AM
To:Homewood, Sue; Jason Kennedy; Darling, Richard
Cc:[e-mail]; Lisa Elmore; Kimberly Hodges; Paul Smith
Subject:RE: DRAFT Haeco
I completed my review of the request for modifications and determined that the modifications as
presented herein satisfy the stormwater rules and concur with Sue’s permit modifications.

From:
Homewood, Sue
Sent:
Monday, April 04, 2016 2:22 PM
To:
Jason Kennedy <[e-mail]>; Darling, Richard <[e-mail]>
Cc:
[e-mail]; Lisa Elmore <[e-mail]>; Kimberly Hodges <[e-mail]>; Paul Smith
<[e-mail]>; Randall, Mike <[e-mail]>
Subject:
RE: DRAFT Haeco

Jason et al,

I’m modifying the permit language in accordance with your response. I believe I have simplified it further:

4. The Division approves the Stormwater Management Plan (SMP) consisting of one 0.8-acre high flow
rate bioretention pond and all associated stormwater conveyances, inlet and outlet structures, and the
grading and drainage patterns depicted on the report dated November 13, 2015 and revised on March 9,
2016 and plan sheets dated November 18, 2015, which are incorporated by reference and are
enforceable by the Division. The following conditions also apply \[15A NCAC 02H .0506(b)(5)\]:

a.The high flow rate bioretention pond shall treat a total of 53.57 acres of existing and proposed built
upon area as indicated in the SMP documentation. \[15A NCAC 02H .0506(b)(5)\]

b.The Permittee shall ensure that the high flow rate bioretention pond is protected from potential media
contamination or clogging during construction activities. \[15A NCAC 02H .0506(b)(5)\]

c.The approved SMP shall be constructed and operational before any permanent building or other
structure is occupied at the site. \[15A NCAC 02H .0506(b)(5)\]

d.The SMP may not be modified without prior written authorization from the Division. A copy of the
approval letter and the modified SMP shall be submitted to the DWR 401 & Buffer Permitting Unit
prior to the commencement of the modifications. \[15A NCAC 02H .0506(b)(5)\]

e.Maintenance activities for the high flow rate bioretention pond shall be performed in accordance with
the notarized O&M agreements signed by Kevin Baker, Executive Director, PTAA on March 18,
2016. The O&M agreement shall transfer with the sale of the land or transfer of
ownership/responsibility for the BMP facility. The Division shall be notified promptly of every
transfer. \[15A NCAC 02H .0506(b)(5)\]

In addition, an internal review warranted slight modification to condition #7.

7. If monitoring conducted pursuant to Condition #5 or #6 indicate that the unnamed tributary is unstable,
or that the banks of the tributary are unstable, then the Permittee shall conduct a detailed analysis of the cause
and propose a resolution to the DWR WSRO. Upon approval by the DWR WSRO the Permittee shall
implement the resolution accordingly.

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