NCG090006_DMR_20201123

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG090000
Date submitted 11/23/20
CERTIFICATE OF COVERAGE NO. NCG090006
FACILITY NAME Mallard Creek Polymer
COUNTY Mecklenburg
PERSON COLLECTING SAMPLES Jens Schoenfuss
LABORATORYPAR Lab Lab Cert. # 20
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR _2020
SAMPLE PERIOD ❑ Jan -June ® July -Dec
�FF(0%'`CC �� or ❑ Monthly' (month)
�1k Ak61� CLASS ❑ORW ❑HQW ❑Trout ❑PNA
DEC 0 7 2020 ❑Zero -flow ❑Water Supply ❑SA
CENT ®Other_C Water Body
LES
DWR SECTION PLEASE REMEMBER TO SIGN ON THE REVERSE
❑ No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Total Cadmium
Total Chromium
Total Lead
Benchmarks ===>
_
-
0.001 mg/L
1.0 mg/L
0.03 mg/L
001
10/28/20
0.43
<0.001 mg/I
0.010 mg/I
0.009 mg/I
002
10/28/20
0.43
<0.001 mg/I
<0.005 mg/I
0.003 mg
003
10/28/20
0.43
<0.001 mg/I
<0.005 mg/I
<0.002 mg/I
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
' For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
'The 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.
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:11/1/2012-10/31/2017 SWU-255, last revised 10/25/2012
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Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
No discharge this period?'
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
001
6/10/20
0.43
NA
143 mg/I
7.03
002
6/10/20
0.43
NA
61 mg/I
7.31
003
6/10/20
0.43
NA
19 mg/I
6.92
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.
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 II SECTION B.
* 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART 11 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 original and one 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. I
am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
(Date)
Permit Date:11/1/2012-10/31/2017
SWU-255, last revised 10/25/2012
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