NCG120013_DMR_20201012

Fr
Field Operations Department
J City of Greensboro
GREENSBORO
October 5, 2020
Brandon Wise, Water Quality Supervisor
North Carolina Department of Environmental Quality
450 West Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
Reference: City of Greensboro -White Street Landfill
NPDES General Permit NCG120000
COC Number NCG120013
Dear Mr. Wise:
OCT 12 2029
p��R f �1 L E,'
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This letter shall serve as an update to the December 31, 2019 letter. Analytical results for September
2020 showed benchmark exceedances of Total Suspended Solids in Outfall 001 and Outfall 005. For this
permit period beginning November 2018, these results place Outfalls 001 and 005 into a Tier II
designation. The permit exceedances for Outfalls 001 and 005 are summarized below:
Outfall Date
TSS- 100
Comments
m g1L
001 12117/19
870
Tier I for TSS
09117120
155
Tier II for TSS
005 12J17/19
181
Tier I for TSS
' 09/17/20
P, 105
Tier II for TSS
The September 2020 sampling event shall serve as the third quarterly event and second semi-annual
event for the facility, required under NPDES General Permit NCG120000.
Sincerely,
Lorien Deaton, Environmental Compliance Specialist
Field Operations Department
Cc: Richard P. Lovett, Environmental Services Support Manager

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Resources General Permit No. NCG120000
Date submitted 1(3- -Q�QO
CERTIFICATE OF COVERAGE NO. NCG12 • _L� i
FACILITY NAME (jai4a
COUNTY _aj jkE,L-�
PERSON COLLECTING SAMPLES (.Or-4e� T
LABORATORY MA +e C1, Lab Cert. # lie'7
Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR J090
SAMPLE PERIOD ❑ Jan -June © July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HCQW ❑Trout ❑PNA
❑Zero -flow [-]Water Supply [:]SA
[-]Other
—
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
n No discharae this neriod?z
Outfall No.
Date Sample
Collected
(mo/dd/yr)
24-hour rainfall
amount,
Inches
Chemical Oxygen Demand
Fecal Coliform
Total Suspended Solids
Benchmarks =__>
_
-
120 mg/L
1000 count per 100 mL
100 mg/L or 50 mg/L4
l
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a
1 '
3n
-•a
.3tp4
' 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.
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. Conversely, where fecal coliform results exceed the dilution upper limit, report the result as ">XX".
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-248, last revised 10/25/2012
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,
Inches3:
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
f:
7,
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:
e 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 ANYONE OUTFALL? YES ❑ NO Q
IF YES, HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑ NO
REGIONAL OFFICE CONTACT NAME: & ,�j.�LVk Gj�sa,
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 Resources
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
am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations."
ature of Permittee)
Permit Date: 11/1/2012-10/31/2017
d -5
(Date)
SWU-248, last revised 10/25/2012
Page 2 of 2