NCS000349_Compliance_20160826

North Carolina Renewable Power, LLC,
2100 Southbridge Parkway, Suite 540
Birmingham, AL 35209
August 26, 2016
Attn: Mr. Mike Lawyer
NCDEQ
Fayetteville Regional Office
225 Green Street, Suite 714
Fayetteville,NC 28301-5095 Ag�'"y�9!
RECDVE
Subject: NPDES Stormwater Permit NCS000349 SEP _ 1 2016
North Carolina Renewable Power, Lumberton, LLC.
Exceedance of Benchmark Values
7E� �YETTEVILLEREGIONALOFFICE
We have determined that there has been 4 exceedances of the benchmark values over the term of the
above referenced permit. We have conducted evaluations and remediation of those 2016 exceedances as
follows:
March 2016: Inspected the outfalls and the surrounding areas and determined that the old galvanized
piping leading from the catch basin to the creek were corroded and had multiple holes exceeding 12".
This came from all the years of the facility being shut down. All of the old galvanized piping was
removed and replaced with new PVC piping.
August 2016: Inspected the outfall and the surrounding area and found that the property was being used
as a lay down yard for new equipment for an off-site project. The equipment was originally covered with
plastic to prevent rain from running off the equipment and into the outfall but a recent storm uncovered
the equipment exposing it to the elements. The equipment in photos I and 2 are primarily manufactured
with copper and aluminum with significant soldering and brazing. Since there is nothing else in the area
that could produce elevated aluminum,copper and zinc levels, we have had the equipment moved well
away from any outfall, see photo 3. We will inspect the equipment on our daily rounds to insure that they
stay covered and we will continue monthly sampling of the outfall to insure our numbers return to
acceptable levels.
During the months of April thru July 2016 the outfall did not produce a flow when checked immediately
following each stone event.The soil on the property in general, and around all of our catch basins, is
extremely sandy, and as such rarely produces a flow. In order to get the sample in August we had to
obtain the sample during the rain event. We will continue collecting samples once we reach the event
threshold even if that means collecting during the storm event. We are exploring other options to
automatically collect samples once we reach the event threshold to insure our compliance.

No,of No.of No.of
Discharge Benchmark 6cceedances Exceedances !an•16 Feb 16 Mar-16 Apr-16 May
Jun-16 Jul-16 Aug 16 Exceedancesi
Characteristic Value
in 2014 in 7015 2016 as of Au
Aluminum 0.75m /L 0 3 3.24 4
Capper 0.007 mg/L 0 3 0.091 0.017 4
Nickel 0.26mg/L 0 2 1 0.672 3
Zinc 0.067 mg/L j 0 3 1.43 0.204 4
r
If you have any questions,please call Mark Fowler at 205-403-5287.
Sincerely,
Steve In
Vice Rresiclent of Engineering
cc: File
William J. Huggins, nrg Energy Services