NCG090004_DMR_20201008

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG090000
Date submitted October 8, 2020
CERTIFICATE OF COVERAGE NO. NCG09 0 0 0 4
FACILITY NAME The Sherwin-Williams Manufacturing Company
COUNTY Guilford
PERSON COLLECTING SAMPLES Nicole Sweet
SAMPLE COLLECTION YEAR 2020
SAMPLE PERIOD ❑ Jan -June 0 July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Research & Analytical Labs Lab Cert. # 34, 37701 a , F s I ❑Zero -flow [:]water Supply [:]SAy,,
Comments on sample collection or analysis: - -�, --� .� � Mother ws-ul; NSW
N/A
Part A: Stormwater Benchmarks and Monitoring Results
OCT 19 2020
FILES
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
Total event rainfall' 0.51"
❑ No discharge this period?2
Outfall No.
Date Sample Collected)
(mo/dd/yr)
Total Cadmium°,
mg/L
Chromium 111 Total
Reco'era le,
Total Lead,
mg/L
pH,
Standard Units
Total Suspended Solids°,
mg/L
Benchmarks
_
0.003 or 0.002
0.905
0.075
6.0-9.0
100 or 50
Parameter Code
_
01027
C0034
01051
00400
COS30
SDO01
09/25/2020
<0.001
<0.005
<0.005
6.90
6.0
SDO02
09/25/2020
<0.001
<0.005
<0.005
6.88
26.8
SDO03
09/25/2020
<0.001
<0.005
<0.005
6.76
9.09
1 Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on -site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4See General Permit text, Table 1, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Note: Results must be reported in numerical format. Do not report Below Detection Limit, BDL, <PQL, Non -detect, ND, or other similar non -numerical
format. When results are below the applicable limits, they must be reported in the format, "<XX mg/L" where XX is the numerical value of the detection
limit, reporting limit, etc. in mg/L.
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
Permit Date: 11/1/2018-05/31/2021 SWU-255, last revised 11/1/2012
Page 1 of 2

Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
❑ No discharge this period?Z
Outfall No.
Date Sample
Collected
(mo/dd/yr)
24-hour rainfall
amount,
Inches
Non -polar Oil and
Grease,
mg/L
Total Suspended Solids'
mg/L
New Motor or
Hydraulic Oil
Usage,
gal/mo
Benchmarks
_
-
15
100 or 504
-
Parameter Code
-
46529
00552
C0530
NCOIL
N/A
Footnotes from Part A also apply to this Part B
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
FOR PART A AND PART B MONITORING RESULTS:
• A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART 11 SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANYONE OUTFALL? YES ®NO E]
IF YES, HAVE YOU CONTACTED THE DEMLR REGIONAL OFFICE? YES ® NO
REGIONAL OFFICE CONTACT NAME:
Mail an original copy of this DMR including all "No Discharge" reports within 30 days of receipt of the lab results (or at end of monitoring period in the
case of "No Discharge" reports) to:
Division of Water Quality
Attn: DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete.
am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
Signature of Permittee
Permit Date:11/1/2018-05/31/2021
O !o
Date
SWU-255, last revised 11/1/2012
Page 2 of 2

SHfRW/N
WILLIAMS.
October S, 2020 R E C E i \/ F n
t
Central Files OCT 19 2020
Division of Water Quality CE r. '71"r ., -.
1617 Mail Service Center D IN :; Ez 0 T. IC,
Raleigh, NC 27699-1617
Re: The Sherwin-Williams Company, Stagecoach Trail, Greensboro, NC
General Permit No. NCG090000
Certificate of Coverage No. NCG090004
Semi -Annual Monitoring — July 1, 2020 — December 31, 2020
Dear Sir or Madam:
Please find enclosed one original and one copy of the results of the semi-annual
monitoring for the Sherwin-Williams Company facility located at 113 Stagecoach Trail in
Greensboro, N.C.
I certify, under penalty of law, that this document and all attachments were prepared
under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my
inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fines and
imprisonment for knowing violations.
Best regards,
Jonathan L. Latimer
Stage Coach Trail Plant Manager