NCG020012_DMR_20210107

)A*Martin
Marietta
January 6, 2021
NC Division of Energy, Mineral, and Land Resources
Winston-Salem Regional Office
Attn: Stormwater Permitting Program
450 West Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
SUBJECT: Martin Marietta Materials, Inc. — Burlington Quarry
NPDES Certificate of Coverage No. NCG020012
Notification of Stormwater Exceedance and Tier I Response
To whom it may concern:
RP815N.pPressley, PE
sr.mv PBYiFf 0aftof
Received ality
JAN 0 7 2021
Winston-Salem
Regional Office
Please find enclosed one original signed stormwater discharge monitoring report (DMR) containing a
turbidity exceedance. The stormwater sample was taken on December 1, 2020. Martin Marietta received
the sample results, containing the turbidity exceedance, on December 9, 2020. The results triggered a
Tier I response for turbidity, as the sample was the first valid sample result of the period and the previous
period's sample result was below the turbidity benchmark. Staff performed a site review to identify and
evaluate possible causes of the exceedance. Implementation of actions identified during the evaluation
will be completed as required by the general permit.
If you have any questions or need additional information please contact me at [phone] orvia email
at [e-mail].
Sincerely,
Phillip N. ressley, PE
Sr. Environmental Engineer
North Carolina East District Office
2700 Wycliff Road Suite 104, Raleigh, NC 27607
t. [phone] f. [phone] m. [phone] e. [e-mail]
www.martinmarietta.com

NC Department of
Environmental Quality
ANNUAL SUMMARY DISCHARGE MONITORING Received
REPORT (DMR) - STORMWATER JAN 0 7 2021
11 SUBMIT TO CENTRAL OFFICE* Winston-Salem 11
General Permit No. NCG020000
2020
"Report ALL STORMWATER monitoring data on this form (include "No Flow"/"No Discharge" and Benchmark
Exceedances) from the previous calendar year to the DEQ by MARCH 1 of each year.
:ate of Coverage No. NCG020012
r Name: Martin Marietta Materials, Inc. - Burlington Quarry
/: Alamance
Number [phone] Total no. of SDO's monitored 1
A Laboratory Pace Analytical Lab # 12
Lab #
Stormwater Discharge Outfall (SDO) No. 2 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,
mi/I
Turbidity,
NTU
Upstream
(U) Turbidity
NTU
Downstream
(D) Turbidity
NTU
Non -polar
OSG, mg/I
VMA
New
Motor Oil
Usage
al/mo.
Stormwater
Benchmarks
InFLO NO
0" '
an hcab'e
aihinrda
Benchmark
10 50
0.1
ni
.�tnark
nchn
5E'25/10
NA
Watar°aa°"
Standarda lies
NA
Water°woty
Standarda lies
15
average
9 9
SS and polar
9
Date Sample
Collected,
mo/dd/ r
12/7/2020
53.2
ND
51.6
Permit Date 10/V2015 - 9/30/2020
Last Revised 10/2/2015

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
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
16 77 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