NCG140266 DMR SW 20210108

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 Flowif"No Discharge" and Benchmark
Exceedances) from the previous calendar year to the DEQ by MARCH 1 of each year.
Certificate of Coverage No. NCG140266
/C:r)
Facility Name: Thomas Concrete of Carolina — Morrisville Plant FEB 0 8 2021
County: Wake CENTr"L FILES
Phone Number: [phone] Total no. of SDOs monkm Sim-,",
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.
1
Total Rainfall,
inches
Total
Suspended
Solids (TSS),
m /I
pH,
SU
Non -polar 08G
(EPA Method
1664 (SGT-HEM)),
mg/I (VMA)
1/appllcable
New Motor Oil
Usage (gallmo.)
1/applicable
Stormwater
Benchmarks
Indicate NOFLOWi/
applicable
Circle Benchmark
100/50
6.0-9.0
15
>55 gallmo. average requires T55 and
Non -polar O&G monitoring
Date Sample
Collected,
mo/dd/yr
01/31/20
NO FLOW
02/06/20
2.6
9.2
6.30
<5.21
N/A
03/23/20
0.32
148
5.93
<0.725
>55
04/30/20
0.15
54
7.55
U
>55
05/19/20
0.32
9.8
6.96
3.02
>55
06/17/20
0.5
2.56
7.38
1 <1.29
>55
07/31/20
NO FLOW
08/31/20
NO FLOW
09/09/20
0.24
3.6
7.56
U
>55
10/31/20
NO FLOW
11/12/20
0.75
42.4
6.30
U
>55
12/14/20
0.32
12.2
6.57
U
>55
Permit Date 8/1/2017 — 6/3012022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
Additional Outfall Attachment (make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. No. 002 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.
Total Rainfall,
inches
Total
Suspended
Solids (TSS),
m /I
pH,
SU
Non -polar 0&G
(EPA Method
1664 (SGT-HEM)),
mgll (VMA)
Napplicable
New Motor Oil
Usage (gal/mo.)
Napplicable
SfUrrl7Water
Benchmarks
Iadicala NO FLOW I!
applicable
Circle Benchmark
100/50
6.0-9.0
15
>55 gellmo. average re,.Ima TSS and
Non,miar OSG monitoring
Date Sample
Collected,
mo/dd/ r
01/31/20
NO FLOW
02/06/20
2.6
74.8
11.98
<5.15
>55
03/31/20
NO FLOW
04/30/20
NO FLOW
05/31/20
NO FLOW
06/30/20
NO FLOW
07/31/20
NO FLOW
08/31/20
NO FLOW
09/30/20
NO FLOW
10/31/20
NO FLOW
11/30/20
NO FLOW
12/31/20
NO FLOW
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
Additional Outfall Attachment (make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. No. 003 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.
—3
Total Rainfall,
inches
Total
Suspended
Solids (TSS),
m /l
pH,
SU
Non -polar O&G
(EPA Method
1664 SGT-HEM)),
mg/I (VMA)
New Motor Oil
Usage (gal/mo.)
Stormwater
Benchmarks
Indicate NO FLOWIr
applicable
Circle Benchmark
100/50
6.0-9.0
15
>55 allmo. ere requires TSS and
avers
g g
Non -polar 08G monitoring
Date Sample
Collected,
mo/dd/ r
01131/20
NO FLOW
02/06/20
2.6
146
8.88
<5.1
N/A
03/23/20
0.32
276
8.84
N/A
N/A
04/30/20
0.15
72
8.48
N/A
N/A
05/19/20
0.32
65.7
8.47
N/A
N/A
06/17/20
0.5
66.7
11.29
N/A
N/A
07/31/20
NO FLOW
08/31/20
NO FLOW
09/09/20
0.24
2.2
9.79
N/A
N/A
10/31/20
NO FLOW
11/12/20
0.75
9.69
N/A
NIA
12/14/20
0.32
199
9.11
N/A
N/A
Permit Date 8/1/2017 — 6/30/2022
Last Revised 8-22-2015

Certificate of Coverage No. NCG140266
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 by 40 CFR §122221
Signature
Date 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 — 6/30/2022
Last Revised 8-22-2015