NCG020123_DMR_20210628

ANNUAL SUMMARY DISCHARGE MONITORING
REPORT (DMR) - STORMWATER
SUBMIT TO CENTRAL OFFICE"
General Permit No. NCG020000
Calendar Year 2021
*Report ALL STORMWATER monitoring data on this form (include "No Flow"1"No Discharge" and Benchmark
Exceedances) from the previous calendar year to the DEQ by MARCH 1 of each year.
Certificate of Coverage No. NCG020123
Facility Name: Martin Marietta Materials, Inc. - Benson Quarry
County: Johnston
Phone Number [phone] Total no. of SDO's monitored 1
Certified Laboratory Pace Analytical Lab # 12
Lab #
Stormwater Discharge Outfall (SDO) No. 1 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? RECEI 1/Fn
Yes, enough consecutive samples below benchmarks to decrease frequency JUL 0' 1
Yes, received approval from DEMLR to reduce monitoring frequency ?Q �
No, turbidity benchmark exceedances did not require monthly monitoring CENTRCAL PILEb
Other
DWR SEECTION
Outfail No.
-----------
Total
Rainfall,
inches
TSS
mgll
SS,
m1/1
Turbidity,
NTU
Upstream
(U) Turbidity
NTU
Downstream
(D) Turbidity
NTU
Non -polar
O&G, mgll
VMA
New
Motor Oil
Usage
allmo.
Stormwater
Benchmarks
Indicate NO
FZOWrI
a ficabfe
cirdeo.
Benchmark
.1BeAncnhmark
IyV 50
0.1
Circle
�B�e�nchmark
( ` V2$110
�7^
NA
Walard applies
Slandard a lies
NA
Warer applies
Standard a lies
155
average
9 q
TM3 monto 55 and Non -polar
9
Date Sample
Collected,
molddlyr
513121
1.5
92.9
1.0
89.8
Permit Date 10/1/2015 - 9130/2020
Last Revised 101212015

Certificate of Coverage No. NCG020123
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 PF4 `-�2.22]
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 10/2/2015