NCG030486_MONITORING INFO_20190927

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
Iv L& 03 b
DOC TYPE.
❑ HISTORICAL FILE
D(MONITORING REPORTS
DOC DATE
❑ p!� �. b q a
YYYYMMDD

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August 5, 2019
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699
Attn: DWQ Central Files
Re: Stormwater Discharge Outfall Monitoring Report for Jan -Jun 2019
A.O. Smith Water Systems
General Permit: NCG030000, Certificate of Coverage: NCG030486
Dear Stormwater Permitting Unit,
Enclosed are one original and one copy of the Stormwater Discharge Outfall Monitoring
Report (DMR) for Jan -Jun 2019 for the A.O. Smith Water Systems facility located at 4302
Raleigh Street in Charlotte, NC. This submittal is for stormwater discharge sampling of
Outfalls 002 and 003 and is consistent with the original monitoring requirements of our
stormwater permit. Based on previous conversations with James Moore of NCDEQ, we
were given verbal approval to go back to semi-annual sampling (no Tier level) from Tier 3
status since we were able to demonstrate that high zinc exceedance levels were from
sources not associated with the facility's manufacturing process, and we installed additional
best management practices to minimize TSS from reaching local receiving streams.
If you have any questions or comments regarding this DMR, please contact me at (704)
597-8910, x202 or [e-mail].
Si rely,
f1
a ra Viers, Plant Manager

- Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG030000
Date submitted 9 - S -2_g�,g
CERTIFICATE OF COVERAGE NO. NCG030486
FACILITY NAME A.O. Smith Water Systems
COUNTY Mecklenburg
PERSON COLLECTING SAMPLES Ryan Habersang, Arcadis
LABORATORY Pace Analytical Services Inc.
Lab Cert. # 40, 37712 & 12, 37706
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑x Jan -June ❑ July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑Water Supply [_]SA
x❑Other Class C
PLEASE REMEMBER TO SIGN ON PAGES 2 AND/OR 3 -->
No discharge this period?Z
Outfall No.
Date Sample
Collected`
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Total Suspended Solids
pH,
Standard units
Copper
Lead
Zinc
Non -Polar O&G/
Total Petroleum
Hydrocarbons
Total Toxic
Organics
Benchmarks ===>
-
-
100 mg/L or 50 mg/L4
6.0 - 9.0
0.007 mg/L
0.030 mg/L
0.067 mg/L
15 mg/L
1 mg/L
SDO-002
06/07/19
1.12
618 mg/L
7.2 (field)
0.074 mg/I
0.016 mg/L
1.620 mg/L
8.0 mg/L
N/A
SDO-003
06/07/19
1.12
235 mg/L
8.0 (field)
0.005 mg/L
< 0.005 mg/L
0.138 mg/L
< 5.0 mg/L
N/A
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
Z 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.
See General Permit, Table 3 identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
s Total Toxic Organics sampling is applicable only for those facilities which perform metal finishing operations, manufacture semiconductors, manufacture
electronic crystals, or manufacture cathode ray tubes. For purposes of this permit the definition of Total Toxic Organics is that definition contained in the EPA
Effluent Guidelines for the facility subject to the requirement to sample (for metal finishing use the definition as found in 40 CFR 433.11; for semiconductor
manufacture use the definition as found in 40 CFR 469.12; for electronic crystal manufacture use the definition as found in 40 CFR 469.22; and for cathode ray
tube manufacture use the definition found in 40 CFR 469.31).
Permit Date:11/1/2012-10/31/2017 SWU-245, last revised 10/25/2012
Page 1 of 3

Facilities that incorporate.a.solvent management plan into the StormwaterPollution Prevention Plan may so certify, and the requirement for TTO monitoring
may be waived. The solvent management plan shall include a list of the total toxic organic compounds used and the other elements listed in the General
Permit. For those facilities electing to employ the TTO monitoring waiver, the discharger shall sign the following certification statement:
"Based upon my inquiry of the person or persons directly responsible for managing compliance with the permit monitoring requirement for total toxic organics
(TTO), I certify that to the best of my knowledge and belief, no dumping of concentrated toxic organics into the stormwater or areas which are exposed to rainfall or
stormwater runoff has occurred since filing the last discharge monitoring report. I further certify that this facility is implementing all the provisions of the solvent
management plan included in the Stormwater Pollution Prevention Plan."
Name (Print name)
Title int title)
(Sig ure) (Date)
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 m¢/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 1, or Tier 3 responses. See General Permit text.
Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
n No discharge this period?Z
Outfall No.
Date Sample
collected`
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Non -polar O&G/TPH by
EPA 1664 (SGT-HEM)
Total Suspended Solids
pH
Benchmarks =__>
-
-
15 mg/L
100 mg/L or 50 mg/L•
6.0 — 9.0 SU
N/A
N/A
N/A
N/A
N/A
N/A
Footnotes from Part A also apply to this Part B
' See General Permit text, Table 5, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Permit Date: 11/1/2012-10/31/2017 SWU-245, last revised 10/25/2012
Page 2 of 3

`- -Note: if you report a sample value -in excess of the benchmark, you must implement Tier I, Tier Z 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 II 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 ANY ONE OUTFALL? YES ❑ NO ❑
IF YES, HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME:
Mail an oriainal and one copv of this DMR, including all "No Discharge" reports within 30 days of receipt of the lab results for 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. I
am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
(Signature
r-t
(Date)
Permit Date:11/1/2012-10/31/2017
SWU-245, last revised 10/25/2012
Page 3 of 3