NCG140218_DMR_20210118

ANNUAL SUMMARY DISCHARGE MONITORING
REPORT (DMR) — STORMWATER
SUBMIT TO CENTRAL OFFICE*
General Permit No. NCG140000
Calendar Year 2020
`Report ALL STORMWATER monitoring data on this form (include "No Flov s�iSif Benchmark
Exceedances) from the previous calendar year to the DEQ by MAR i of ea
Certificate of Coverage No. NCG140218 CENTRAL FILES
Facility Name: Thomas Concrete of Carolina — Durham Plant OWR SECTION
County: Durham
Phone Number: [phone] Total no. of SDOs monitored 1
Certified Laboratory ESC - Pace Analytical Lab # ENV 375
Lab #
Stormwater Discharge Outfall (SDO) No. 001 VMA Outfall? Yes® No ❑
Is this outfall currently in Tier 2 for any parameter? Yes ® No ❑
Was this outfall ever in Tier 2 during the past year? Yes ® No ❑
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency ❑
Yes, received approval from DEMLR to reduce monitoring frequency ❑
Other ❑
Outfall No.
001
Total Rainfall,
inches
Total
Suspended
Solids (TSS),
rn /I
PH,
SU
Non -polar 08G
(EPA Method
1664 (SGT-HEM)),
mg/I (VMA)
[/applicable
New Motor Oil
Usage (gal/mo.)
[/applicable
Stormwater
Benchmarks
Indicale NOFLOWir
applicable
Circle Benchmark
100/50
6.0-9.0
15
sSS gallmo. average requires TSS and
Non polar OdG monitodng
Date Sample
Collected,
mo/dd/ r
01/31/20
NO FLOW
02/06/20
2.20
129
11.64
<5.1
>55
03/31/20
NO FLOW
04/30/20
1.67
80.7
11.75
2.56
>55
05/19/20
0.81
154
11.79
1 U
>55
06/17/20
1.20
120
11.36
5
>55
07/24/20
0.84
80.4
11.23
<15
>55
08/31/20
NO FLOW
09/09/20
0.24
385
11.83
2.42
>55
10/31/20
NO FLOW
11/11/20
0.35
327
11.91
U
>55
12/16/20 0.38 180 9.72 u >55
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140218
CERTIFICATION
" 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."
(Required 5y 40 CFR §122.221
Signature
Date ( /A -i
Mail Annual Summary Stormwater DMR to the NCDEQ Central Office:
Note the address is correct — Central Files is housed in DWR (not DEMLR)
N.C. Department of Environmental Quality (DEQ)
Division of Water Resources
Attn: DWR Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Central Files Telephone [phone]
Questions? Contact DEMLR Stormwater Permitting Staff in the Central Office at:
[phone]
Permit Date 8/1/2017 — 6/3012022
Last Revised 8-22-2015