19960933 Ver 1_Certified Return Receipt_20081107

t Michael F. Easley, Governor
?0F W AT'T'
? G William G. Ross Jr., Secretary
co North Carolina Department of Environment and Natural Resources
r
O ,`, __- _, .: •;?`? ? Coleen H. Sullins, Director
Division of Water Quality
November 4, 2008
DWQ Project # 96-0933
Guilford County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Clarence Todd, President
Mylan Pharmaceuticals, Inc.
781 Chestnut Ridge Road
Morganton, WV 26504
Subject Property: Mylan Pharmaceuticals Plant
REQUEST FOR MORE INFORMATION: STORMWATER MANAGEMENT PLAN
Dear Mr. Todd:
On October 21, 1996, the Division of Water Quality (DWQ) issued a 401 Water Quality Certification
to impact surface waters in order to construct the subject pharmaceuticals plant in Guilford County.
In order to meet the conditions of the 401 Certification for this project, a stormwater management
plan, dated May 22, 1997, was approved by the DWQ on August 25, 1997. A revised stormwater . .
management plan for this site, dated September 24, 2008, was received by the DWQ on September.
25, 2008. The DWQ has determined that your stormwater management plan was incomplete as
discussed below.
Additional Information Requested:
1. Please provide a separate Required Items Checklist for each of the proposed wet
detention ponds, as well as any required items that were omitted in the current submittal.
For example, a separate scaled cross-sectional detail should be provided for each pond.
2. Please provide a properly designed level spreader and vegetated filter strip at the outlet of
each wet detention pond. In your resubmittal, please provide a Level Spreader
Supplement Form (including the Required Items Checklist and all required items) for
each device, available at: http•//h2o.enr.state.ne.us/su/bmp for ns.htm.
Please address the following issues associated with the vegetated shelves of the wet
detention ponds.
a. A 10:1 slope for the vegetated shelf should be specified on the cross-sectional
detail of the wet detention ponds.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: hw.-/'12o.cnr.statc.ncusinwetlands
Noy` Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/l0% Post Consumer Paper
96-0933 Mylan Pharmaceuticals
November 4, 2008
Page 2 of 2
b. The cross-sectional detail does not show the vegetated shelf at the appropriate
elevation.
c. The vegetated shelf must have a planting plan that includes: A variety of suitable
species (not including cattails), sizes, spacing and locations of plantings, total
quantity of each type of plant specified, a planting detail, and fertilizer and
watering requirements to establish vegetation.
4. Please provide details of the anti-seep devices.
5. Please check the drawdown calculations. The specifications for two four-inch orifices in
Pond 1 and two six-inch orifices in Pond 2 will result in a drawdown rate of much shorter
than two days for the one-inch storm.
The DWQ will require the above additional information to finalize review of the stormwater
management plan for the subject property. Please provide the following information so that we may
continue to review your project. You are welcome to contact me at 919-715-3425 if you have
questions or would like to set up a meeting.
Sincerely,
wJ
Annette Lucas,. Environmental Engineer III
401 Oversight/Express Review Permitting Unit
AML/aml
Cc: Army Corps of Engineers, Raleigh
DWQ, WSRO
Central Files
File Copy
Matt Matthews
Filename: 960933MylanPharmaceuticals(Guildford)_S W_Hold.doc
\ ? : • 1/ ' ¦ _ ? ?!T???,r-Truer=sr?rz?.r3.irn?.?raara??md?r
¦ Complete items 1, 2, and 3. Also complete
item 4 if Restricted Delivery is desired.
¦ Print your name and address on the reverse
so that we can return the card to you.
¦ Attach this card to the back of the mailpiece,
or on the front if space permits.
1. Article Addressed to:
Mylan Pharmaceuticals, Inc.
Attn: Mr. Clarence Todd, President
781 Chestnut Ridge Road
Morganton, WV 26504
DWQ4 96-0933-Guilford
A.
X
? Agent
? Addressee
B. Received by (Printed a e C. D to of D ive
ftn0Q qJT -?? -
D. Is delivery address different from item 1? ? Yes
If YES, enter delivery address below: ? No
3. ervice Type
Certified Mail Express Mail
Registered Return Receipt for Merchandise
? Insured Mail ? C.O.D.
4. Restricted Delivery? (Extra Fee) ? Yes
2. Article Number
(rransferfrom service l 7008 1830 0003 8753 2416
PS Form 3811, February 2004 Domestic Return Receipt 102595-02-M-1540
UNITED STATES POSTAL SERVICE
LISPS;
• Sender: Please print your name, address, and ZIP+4 in this box •
NC DENR Division of Water Quality
401 Oversight/Express Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
First-Class Mail
Postage & Fees Paid
Permit No. G-10
ILL Ili 1111; 11 Mid ijifl H ildid