NCG020009 DMR SW 20210216

ANNUAL SUMMARY DISCHARGE MONITORING
REPORT (DMR) - STORMWATER
SUBMIT TO CENTRAL OFFICE*
General Permit No. NCG020000
Calendar Year 2020
'Report ALL STORMWATER monitoring data on this form (include "No Flow"P'No Discharge" and Benchmark
Exceedances) from the previous calendar year to the DEQ by MARCH 1 of each year.
Certificate of Coverage No. NCG020009
Facility Name: Martin Marietta Materials, Inc. - American Stone Quarry
County: Orange
Phone Number [phone] Total no. of SDO's monitored 2
Certified Laboratory Pace Analytical Lab # 12
Lab #
Stormwater Discharge Outfall (SDO) No. 002 VMA Outfall? Yes No X
Is this outfall currently in Tier 2 for any parameter? Yes No X
Was this outfall ever in Tier 2 during the past year? Yes No X
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
No, turbidity benchmark exceedances did not require monthly monitoring
Other
Outfall No.
-----------
Total
Rainfall,
inches
TSS
mg/1
SS,
ml/I
Turbidity,
NTU
Upstream
(U) Turbidity
NTU
Downstream
(D) Turbidity
NTU
Non -polar
O&G, mg/I
VMA
New
Motor Oil
Usage
al/mo.
Stormwater
Benchmarks
Indicate NO
pat oFLOW/e
Benchmark
BaQ imark
1U S�
0.1
circle
�/�CicleBenchmark
's 2$/10
NA
samarQuality
aaoes
NA
standard aWater ppity
les
15
nto
>Ssgaequi
average requires
TS5 and ar
01 monii
Date Sample
Collected,
mo/dd/yr
6/16120
1.1
53.2
1.5
86.8
12/1/20
2.2
29.0
ND
50.2
109.0
8.0
D
ILEhy
Permit Date 10/1/2015 - 9/30/2020
Last Revised 10122015

Certificate of Coverage No. NCG020009
Additional Outfall Attachment (Make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. 001 VMA Outfall? Yes X No
Is this outfall currently in Tier 2 for any parameter? Yes No X
Was this outfall ever in Tier 2 during the past year? Yes No X
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
No, turbidity benchmark exceedances did not require monthly monitoring
Other
Outfall No.
-----------
Total
Rainfall,
inches
TSS
mg/I
SS,
ml/I
Turbidity,
NTU
Upstream
(U) Turbidity
NTU
Downstream
(D) Turbidity
NTU
Non -polar
O&G, mg/I
(VMA)
New
Motor Oil
Usage
(gal/mo.)
Stormwater
Benchmarks
Indicate NO
FLowit
appixable
Ord.
Benchmark
10 /50
0.1
clrGe
Benchmark
9/25/10
NA
Water Quarity
Standard applies
NA
Water Quality
Standard applies
15
>55 gallmo,
average requires
TSS and Non -polar
O&G monitoring
Date Sam pie
Collected,
mo/dd/yr
> 55
> 55
No Observed Dischar e in 2020
Permit Date 10/1/2015 - 9/30/2020
Last Revised 10/2/2015

Certificate of Coverage No. NCG020009
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 violation."
[Required by 40 CFR §122.22]
Signature
Date
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 10/1/2015 - 9/30/2020
Last Revised 101212015