NCG080614_DMR_20220708

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCGO80000
Date submitted 7/8/22
CERTIFICATE OF COVERAGE NO. N0008 0 6 1 4 SAMPLE COLLECTION YEAR 2022
FACILITY NAME Rex Oil Company SAMPLE PERIOD X❑Jan-June ❑July-Dec
COUNTY Davidson . or ❑Monthly' (month)
PERSON COLLECTING SAMPLES Ben Robinson DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Waypoint Analytical Lab Cert.# 402 IVE D ❑Zero-flow ❑Water Supply ❑SA
Comments on sample collection or analysis: X❑Other Class C
JUL 2 5 2022
CENTRAL FILES PLEASE REMEMBER TO SIGN ON THE REVERSE 4
yWR SE T�Ig
Did-this facility perform Vehicle Maintenance Activities using more than 55 gallons o new moo i,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) ❑ No discharge this period'
Outfall " Date °, 00530 00400 00556.E,
No Sam Ie Collected, F Total Sus ended H; Non Polar Oil and.Grease/TPH`EPA Neww`IVloto�r l i Usage, `
p p e�p e ,
Solids,mg/L Standard units, Method 1664,(SGT-HEM);9rng%L ;annual average gal%rno
Benchmark 4.,:`: 50 or Off'see permit Within 6.0—9.0 15 -
Part B: Oil/water Separators and Secondary Containment Areas at Petroleum Bulk Stations and Terminals(If applicable)
Outfall Date._
ate, 0055E 00530 00400.,
No Sample Collected, Non Polar Oil:and-Grease/.T0KEPA Method TataI Suspended Sol tls, '' pH
/yr, 1664(SGT-HEM), mg/L- mg/L T.Standard units `
Permit Limit -, 15 50 or 106,ee permit 6 0-,9 0
SDO-1 6-27-22 <3.3 3.3 7.93
1 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
SWLJ-250 last revised April 11,2013
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STORM EVENT CHARACTERISTICS:
Date6/27/22 (first event sampled)
Total Event Precipitation (inches): 0.50"
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 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 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 for 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."
-
7/8/22
(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
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