NCS000077_Status of Semi Annual Monitoring_20190701

DDP Specialty Electronic Materials US9, LLC D■
2914 Patterson Street ' U'PJ w0■,NT,
Greensboro, NC 27407
336.547.7273
06/28/19
Division of Energy Mineral and Land Resources
Attn: Stormwater Program
512 N. Salisbury Street
Raleigh, NC 27604
Re: 2019 Semi -Annual Stormwater Discharge Outfall Monitoring Event
NPDES Permit No. NCS000077
JUL 01 2019
DENR-LAND QUALITY
STORMWATER PERMITTING
As the holder of NPDES Stormwater Permit NCS000077, we are aware of our responsibility to collect
stormwater samples twice yearly, once in the January -June timeframe and once in the July -December
period. We are also cognizant of the requirement for a 60-day period between samples and a 72-hour
requirement for a rain -free period prior to collecting samples. The permit also states that sampling is not
required outside of the facility's normal operating hours and that a measurable rainfall event is a storm
event that results in an actual discharge from the permitted site outfall.
Our last sampling event took place on December 20, 2018 and results were submitted to your agency
once they were received from the testing laboratory. This meant that we could begin to collect samples
on February 20, 2019 for submission for the first half of 2019. We chose, however, to wait to collect the
samples so that we could be assured that they were representative of the actual stormwater discharge
from our site and that enough time had passed since the previous sampling event to recognize any
changes in discharge content.
A sampling kit was requested from our testing lab and was delivered on May 3, 2019. Since that time,
there have been no instances of rainfall events that met all of the requirements listed above. We are still
waiting to experience a representative event so that we can properly sample as per our permit.
As of today, there are no rain events forecast within the next ten days during which the facility will be
operating. There are some 40% probabilities of afternoon thunderstorms, but they are on days that the
facility will be closed for the July 4th holidays.
We are diligently watching for chances to collect samples, but it appears that there will be no
opportunities until at least toward the end of the week of July 8th — July 12th.
With the above in mind, we respectfully request that your agency will extend the deadline for our Jan -
June time frame until such time as we can meet the requirements and parameters for our semi-annual
sampling event.
Thank you in advance for your consideration of this request, and please feel free to contact me at (336)
830-4851 (cell) or by e-mail at [e-mail] with any questions or comments.
Sincerely,
v .
R hard Kelley
EHS Technician