NCG080799_DMR_20200925

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG080000
Date submitted n1-a6- a Oa0
CERTIFICATE OF COVERAGE NO. NCGO8 0 7 9 9
FACILITY NAME Hugh Medford Municipal Operations Center
COUNTY Guilford
PERSON COLLECTING SAMPLES Lorien Deaton
LABORATORY Meritech , Inc. Lab Cert. # 165
Comments on sample collection or analysis:
SAMPLE COLLECTION YEAR 2021 _
SAMPLE PERIOD ❑ Jan -June ® July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
_ nn ❑Zero -flow ®Water Supply ❑SA
REC :1ND []Other
OCT U 5 2020 PLEASE REMEMBER TO SIGN ON THE REVERSE 4
Did this facility perform Vehicle Maintenance Activities using more than 55 g@Fonsii4t'reek ii&r oil per month? X yes _no
�'; ` O?
(if yes, report your analytical results in the table immediately below) �� ION
Part A: Vehicle Maintenance Areas Monitoring Requirements (If applicable)
Part B: Oil/water Separators and Secondary Containment Areas at Petroleum Bulk Stations and Terminals (If applicable)
No discharge this period'
I For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
SWU-250 last revised April 11, 2013
Page 1 of 2

STORM EVENT CHARACTERISTICS:
Date 9-17-20 (first event sampled)
Total Event Precipitation (inches): 2.36"
Date (list each additional event sampled this reporting period, and rainfall amount)
Total Event Precipitation (inches):
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:
o A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
0 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART 11 SECTION B.
s TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO En
IF YES, HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑ NO
REGIONAL OFFICE CONTACT NAME: Brandon Wise
Mail an_opiainal and one copy of this DM-R, 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 A INFPRRMATION 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 of Permittee) (Date)
Additional copies of this form may be downloaded at: http://Portal.ncdenr.org/web wg/ws/su/npdessw#tab-4
SWU-250 last revised April 11, 2013
Page 2 of 2

Field Operations Department
City of Greensboro
OCT 05 2020
September 25 2020
TO: Hugh Medford Municipal Operations Center S WPPP
FROM: Lorien Deaton
SUBJECT: Tier Two Storm Water Management Inspection Report
Hugh Medford Municipal Operations Center, Greensboro, NC
General Permit No. NCG0800000 7 ''
Storm Water Management Inspection
Storm water samples for the second period of 2020 were taken on 9/17/2020. The lab results
were received on 9/24/2020 and showed that total suspended solids (TSS) exceeded the
benchmark value for Outfall A. On 9/25/2020, an investigation for the possible causes of the
TSS exceedances was conducted.
Outfall A
The sampling location at Outfall A was inaccessible at the time of sampling so samples were
taken up gradient from the outfall, not allowing proper BMPs to fully take effect.
r
GREENSBORO
Outfall A is on the southern portion of the property where equipment storage, employee parking,
and several aggregate stockpiles are located. A dirt parking lot just north of Outfall A could
have caused the high TSS reading due to the lack of riprap at the corner of the lot leading to the
retention pond. Asphalt grindings will be placed on the parking area, riprap will be installed at
the culvert leading from the parking area, and a confirmation sample at the approved outfall
location will be collected during the next stormwater event.
Thank you,
Lorien Deaton