NCG200337_COMPLETE FILE - HISTORICAL_20160520

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
/v uc
DOC TYPE
EA HISTORICAL FILE
❑ MONITORING REPORTS
DOC DATE
❑ D 0 1 � D S �7
YYYYM M D D

BISH ENTERPRISES INC.
Recycling Scrap Metals in Chatham County Since 1955
P. 0. Box 451 Phone [phone]
SILER CITY, N. C. 27344-0451
May 18, 2016
Mr. John Holley, Regional Supervisor
DEMLR-Raleigh Regional Office
1628 Mail Service Center l
Raleigh, North Carolina 27699-1628
Re: Notification of Tier 3 Stormwater Status Ctii�1l 0 9� ;� 1 7
Bish Enterprises, Inc. —Chatham County
Certificate of Coverage No. NCG200337
NC DENR Raleigh Regional Once
Dear Mr. Holley:
As required in Part II, Section B of our General Stormwater Permit, this provides written notice
that one of our facility's two stormwater outfalls (SDOii001) has fallen into Tier 3 status for zinc.
Prior to this, Tier 1 and Tier 2 protocols were implemented for the outfall. This outfall is
currently being monitored monthly, according to the Tier 2 requirement, for copper, and now
for zinc. A summary of the analytical results to date for this outfall is attached for your
information.
Zinc concentrations in this outfall have averaged 0.440 mg/I over eight (8) samples since our
renewed permit took effect on February 2, 2015. Four of the eight samples were below the
benchmark level. For the four samples below benchmark, the concentration average is 0.074
mg/l. The samples above benchmark have averaged 0.807 mg/I. In an attempt to reduce the
zinc and other metal concentrations, we have increased our house keeping and grounds keeping
efforts, and have reviewed and minimized our industrial stormwater exposures insofar as
possible. However, periodically, zinc concentrations are above the benchmark value. Like many
other facilities, we have galvanized roofing, as well as some metal roof downspouts, which may
contribute to the increased metals levels at our facility. We have also made additional efforts to
minimize outdoor scrapping and recycling activities at the facility by relocating them to covered
areas. SDOtt001 is located at the intersection of State Road 1105 (Bish Road) and the Norfolk
Southern railway line. These off -site influences also contribute metals to our Stormwater
discharges. As mentioned above, we are currently collecting monthly analytical stormwater
samples for analysis and reporting.
Thank you. If there are any questions, please let me know, or you may contact our
environmental consultant, Charles D. Blackwell with Applied Water Technology, Inc. at 919-418-
6651. We appreciate your consideration of this issue, and look forward to cooperatively
working with DEMLR to seek a mutually satisfactory solution.
Sincerely,
BISH ENTERPRISES, INC.
�ohn D. McSween
President

SUMMARY OF STORMWATER OUTFALL ANALYTICAL DATA*
SDO#001
Sample
Date
Rainfall (in.)
TSS
COD
Cu
Pb
Zn
TPH
BnchMk
»»»»
100
120
0.010
0.075
0.126
15
3/6/2015
1.04
8.4
103
0.015
<0.005
0.0829
3/27/2015
0.25
<5
10/2/2015
0.48
93.3
<25
0.324
0.265
1.05
<5
11/3/2015
2.8
19.8
81
0.131
0.0787
0.328
30.3
12/17/2015
1.5
30.2
63
0.0128
0.0077
0.0659
<5
2/4/2016
0.82
it
77
0.0126
<0.005
0.0752
<5
3/28/2016
2.3
21
60
0.014
<0.005
0.0731
<5
4/12/2016
0.5
146
45
0.647
0.581
1.58
<5
5/3/2016
1.33
16.6
<25
0.0637
1 0.0125
0.268
1 <5
*Analyzed by Pacelabs. All data in mg/I except rainfall. Values shown represent raw data from
respective lab reports, and is not rounded off.