NCG210450_DMR_20220114

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina DEMLR General Permit No. NCG210000
CERTIFICATE OF COVERAGE NO. NCG21 0 4 5 0
FACILITY NAME Enviva Pellets Hamlet, LLC
COUNTY Sampson
PERSON COLLECTING SAMPLES Catherine Grazioli
LABORATORY NIA Lab Cert. If _
Comments on sample collection or analysis:
Date submitted 1/14/2022
SAMPLE COLLECTION YEAR 2021
SAMPLE PERIOD ❑ Jan -June ❑■ July -Dec
or ❑ Monthly' (month)
lVPISCHARGINGTOCLASS ❑ORW ❑HQW ❑Trout ❑PNARECE
❑Zero -flow ❑Water Supply ❑SA
JAN 3 11 -?OZl ❑Other
CENTRAL FILES PLEASE REMEMBER TO SIGN ON THE REVERSE
DWR SECTION
Part A: Stormwater Benchmarks and Monitoring Results (Monitoring is required only if the facility stores exposed accumulations of sawdust, wood chips,
bark, mulch, or other similar material on site for longer than seven (7) days.)
0 No discharge this period?2
Outfall No.
Date Sample
Collected
(mo/dd/yr)
24-hour rainfall
amount,
inches'
Chemical Oxygen Demand
Total Suspended Solids
Benchmarks =__>
-
-
120 mg/L
100 mg/L or 50 mg/L4
001
11/08/2021
0.40
No Flow
No Flow
002
11/08/2021
0.40
No Flow
No Flow
003
11/08/2021
0.40
No Flow
No Flow
004
11/08/2021
0.40
No Flow
No Flow
1 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.
'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.
4 See General Permit text, Table 3, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Note: Results must be reported in numerical format. For example, 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 me/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: 8/1/2018-7/31/2023 SWU-245, last revised 8/6/2018
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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
i
Collected
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Non -polar O&G by EPA
1664(SGT-HEM)
Total Suspended Solids
Benchmarks =__>
_
-
15 mg/L
100 mg/L or 50 mg/L4
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 II SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER ATTHE SAME OUTFALLTRIGGER 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 DEMUR 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
in the case of "No Discharge" reports) to:
Attn: DWR 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
a -Tre that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
of
01/20/2022
(Date)
Permit Date: 8/1/2018-7/31/2023 SWU-245, last revised 8/6/2018
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