20091096 Ver 1_Staff Comments_20091218

Mcmillan, Ian
From: Gyamfi, Joseph
Sent: Friday, December 18, 2009 1:30 PM
To: Mcmillan, Ian
Subject: First Health Hospice and Palliative Care: 2009-1096
Attachments: FirstHealthHospiceandPalIiativeCare(Moore)09-1096_hold3.docx
Hi Ian,
Please see attached for the comments to request for additional information. I hope you would have time to send it
today, please revise where necessary. Let me know if you have any questions. Thanks.
Joe
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Joseph Gyamfi, P.E., P.Eng.
Environmental Engineer
NCDENR/DWQ
401/Express Permitting Unit
2321 Crabtree Blvd., Suite 250, Raleigh, NC 27604
Phone: [phone]
Fax: [phone]
Website: httP://h2o.enr.state.nc.us/ncwetiands/index.htmI
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
1
Project Name: First Health Hospice and Palliative Care
DWQ Project 09-1096
Date Received: 11/24/09
Date of Comments: 12/18/09
Comments:
The DWQ has agreed to consider the project as a low density project as approved by the
Village of Pinehurst. However, please submit the following information for further
review:
(1) The design information of the grassed swales: The grass swales should be
designed to meet the major design elements in the NCDWQ BMP Manual,
notably passing the 10-year storm non-erosively, having a maximum longitudinal
slope of 5% (where practicable), 3:1 side slopes, and a minimum freeboard of
0.5ft.
(2) The design information of the level spreaders: Please identify the level spreaders
and submit a completed Level Spreader Supplement Form for each device along
with all items in the Required Items Checklist. This office has determined that
some of the level spreaders are not sighted properly in terms of
a. steep slopes,
b. inflows entering the blind swales perpendicularly instead of directing them
at an angle, and/or
c. having shorter lengths than the required minimum of 13ft.
(3) Please include photos of the vegetation downslope of the level spreaders.
(4) If you choose to propose bypass channels, you must provide the design discharges
and associated velocities for the 10-year storm in the bypass channels, and include
photos of the vegetation downslope of their discharge points or the surrounding
wetlands.
(5) Design information of proposed energy dissipators.
If you have any questions, please contact Joseph Gyamfi at [phone].