NCG140218_DMR SW_20220222

ANNUAL SUMMARY DISCHARGE MONITORING
REPORT (DMR) — STORMWATER
SUBMIT TO CENTRAL OFFICE'
General Permit No. NCG140000
Calendar Year 2021
'Report ALL STORMWATER monitoring data on this form (include "No Flow"rNo Discharge' and Benchmark
Exceedances) from the orevious calendar vear to the DEO by MARCH f of each veer.
CertlFlcate of Coverage No. NCG14 ] ] 10®
Facilitv Name: Thomas Concrete of Carolina - Durham Plant
County: Durham
Phone Number: 9( 19 )598-0456 Total no. of SDOs monitored 1
Certified Laboratory Pace Analytical Lab # 375
Lab #
Stormwater Discharge Outfall (SDO) No. 001 VMA Outfall? Yes 0 No ❑
Is this outfall currently In Tier 2 for any parameter? Yes 0 No ❑
Was this outfall ever in Tier 2 during the past year? Yes El No ❑
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency f]
Yes, received approval from DEMLR to reduce monitoring frequency f]
Other ❑
Outfall No.
001
Total Rainfall,
inches
Total
Suspended
Solids (TSS),
m /I
pH,
SU
Non -polar O&G
(EPA Method
1664 (SGT-HEM)),
mg/I (VMA)
pw;=agile
New Motor Oil
Usage (gal/mo.)
s.wp .
Stormwater
Benchmarks
Indkata Nn R.OWN
.p01kalla
ClydBe° hrne,k
100/50
6.0-9.0
15
>99 gagne, avenge requites T99 and
N.rvpolar OdG monit.nng
Date Sample
Collected,
mo/ddl r
01/25/21
0.07
105
10.96
<1.22
>55
02/11/21
0.97
65.3
11.35
<1.22
>55
03/16/21
0.24
75.2
11.40
<1.29
>55
04/21
NO FLOW
05/21
NO FLOW
06/03/21
0.17
3.0
11.44
<1.16
>55
07/08/21
0.41
32
11.58
<1.16
>55
08/21
NO FLOW
09/09/21
0.31
102
11.75
3.05
>55
10/21
NO FLOW
11/21
NO FLOW
12/21
NO FLOW
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG14 ®®p®
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 vlolatlons."
[Required by 40 CFR §12222]
Signature
Date
Mall 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 276994617
Central Files Telephone [phone]
Questions? Contact DEMLR Stormwater Permitting Staff In the Central Office at:
[phone]
Permit Date 811/2017 — 813012022
Last Revised 8-22-2015