NCG080614_DMR_20201104

Semi-annual Stormwater DischarLye Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG080000
Date submitted 11/4/20
CERTIFICATE OF COVERAGE NO. NCG08 0 6 1 4 SAMPLE COLLECTION YEAR 2020
FACILITY NAME Rex Oil Company SAMPLE PERIOD ❑ Jan -June X❑ July -Dec
COUNTY Davidson or [:]Monthly' (month)
PERSON COLLECTING SAMPLES Ben Robinson► � CHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
iZero-flow Water Supply LABORATORY Meritech, Inc. Lab Cert. # 165 Qother Class C pp y ❑SA
Comments on sample collection or analysis: NOV U 9 2020
CENTRAL FILES PLEASE REMEMBER TO SIGN ON THE REVERSE 4
DwR SECTION
Did this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _yes X-no
(if yes, report your analytical results in the table immediately below)
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'
Outfall
Date
00556
OOS30
00400
No.
Sample Collected,
'Von -Polar Oil and Grease/TH EPA Method
Total Suspended Solids,
pH,
mo/dd/yr
1664 SGT-HEM),'mg/L
oWL,
Standard units
Permit Limit
15
SO or 100-see permit
6.0 — 9 0
SDO-1
1 10-29-20
<5
10
7.46
t 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
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STORM EVENT CHARACTERISTICS:
Date 10/29/20 (first event sampled)
Total Event Precipitation (inches): 0.23"
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:
• 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 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 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."
11 /4/20
(Signature of Permittee)
(Date)
Additional copies of this form may be downloaded at: http://portal,ncdenr.org/web/wq/ws/su/npdessw#tab-4
SWU-250
last revised April 11, 2013
Page 2 of 2