20120076 Ver 1_Staff Comments_20120223

Lucas, Annette
From
Lucas Annette
Sent
Thursday February 23 2012 11 53 AM
To
Turimgton Chad
Cc
Lucas Annette
Subject
12 0076 Unihealth Post Acute care
Attachments
12 0076 Unihealth Post Acute Care docx
Chad
My comments on this project are attached
Thanks
Annette
Annette M Lucas PE
Environmental Engineer
NCDENR I DWQ I Wetlands and Stormwater Branch
1650 Mail Service Center Raleigh NC 27699 1650 (M ill)
512 N Salisbury St Raleigh INC 27604 1 911 Floor (Lac ition R Y ircc ls)
Phone [phone] Fax [phone] ( Email Annette Luc i% r ncderlr -o\
Website http / /portal ncdenrorg/web/wcI/swp/ws/401
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12 0076 Unihealth Post Acute Care
AML comments
February 20 2012
1 Please relocate the two inlets to Proposed Wetland #1 so that they discharge directly to the
forebay rather than to the adjacent side slope This will minimize the risk of erosion
2 The DWQ strongly recommends removing the stilling basin device located between the two
wetlands and instead suggests that stormwater be piped through this area to minimize erosion
and maintenance issues
3 For the planting plan
a Please remove the plants that are specified in the deep pools where the outlet devices
are located to avoid clogging issues
b Many of the instructions provided on Sheets L 01 and L 02 do not pertain to stormwater
wetlands Per the BMP Manual only a one time fertilizer application to establish the
plants is permitted Please provide appropriate instructions for establishing the wetland
plants (including watering specifications)
c Please include the grass species and instructions for preparation establishment and
management you wish to specify for the side slopes around the perimeters of the
stormwater wetlands
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