NCG080614_DMR_20231211

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCGO80000
Date submitted 12/11/23
CERTIFICATE OF COVERAGE NO. NCG08 0 6 1 4
FACILITY NAME _ Rex Oil Company
COUNTY Davidson
PERSON COLLECTING SAMPLES Ben Robinson
LABORATORY Waypoint Ana ytical Lab Cert. # 402
Comments on sample collection or analysis:
UEC 15 2023
SAMPLE COLLECTION YEAR 2023
SAMPLE PERIOD ❑ Jan -June Q July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW []Trout ❑PNA
❑Zero -flow ❑Water Supply ❑SA
Mother Class C
PLEASE REMEMBER TO SIGN ON THE REVERSE 3
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)
❑ No discharge this period'
GU_ tfall
No.
Benchmark
Date
Sample Collected,
mo/dd/yr
00530
00400
00556
Total Suspended
Solids, mg/L
50 or 100 see permit
pH,
Standard units
Within 6.0-9.0
Non -Polar Oil and Grease/TPH EPA
Method 1664 (SGT-HEM), mg/L
is
New Motor Oil Usage,
Annual average gal/mo
Part B: Oil/water Separators and Secondary Containment Areas at Petroleum Bulk Stations and Terminals (If applicable)
Outfall
No.
Permit Limit
SDO-1
Date
Sample Collected,
mo/dd/yr
-
11-21-23
00556
00530
00400
Non -Polar Oil and Grease/TPH EPA Method
1664 (SGT-HEM), mg/L
15
<3.3
Total Suspended Solids,
mg/L
50 or 100 see permit
24.5
pH,
Standard units
6.0 — 9.0
7.76
I For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
S WU-250
last revised April H, 2013
Pagel of 2

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