NCG020172_Tier Letter_20200110

January 10, 2020
Central Files
Stormwater Permitting Program
1617 Mail Service Center
Raleigh, North Carolina, 27699-1617
RE: Vulcan Materials Company - Cabarrus Quarry
COC No. NCG020172
Stormwater Outfall 002 and 005
To Whom It May Concern:
In accordance with General Permit NO. NCG020000 Vulcan Materials Company, LLC (Vulcan) is
submitting notification within the 30 days of receipt of analytical results indicating an exceedance of a
benchmark value as outlined in Part V Section E. Vulcan's contract laboratory contacted Vulcan in late
December to inform us that the turbidity levels in the samples for Outfalls 002 and 005 were potentially
above the benchmark values (note that the laboratory results were received on December 31, 2019). A
copy of the discharge monitoring report for the above referenced facility, which includes the laboratory
report received on December 31, 2019, is provided as Attachment 1.
Vulcan is in the process of implementing the Tier One response requirements for turbidity exceedances as
detailed in Part IV, Section A of General Permit No. NCG020000. Specifically, Vulcan attempted to the
identify and evaluate the possible causes of the benchmark exceedance within one week of being notified
of the results. The exact cause of the exceedance was unknown at the time and therefore, the facility took
another sample during the next qualified storm event. The results of the second sample have indicated
that the turbidity results were significantly less than the benchmark value (both samples were reported at
<1 NTU). A copy of the second sampling event analytical report is provided as Attachment 2.
Although it appears that there does not appear to be a turbidity issue at these outfalls at this time, as part
of the Tier one process, Vulcan plans to continue its research into potential causes of the exceedances and
make improvements to our 002 and 005 Outfall structures in the near future. Documentation of all
responses in accordance with the Tier One requirements for turbidity will be maintained with the
facility's Stormwater Pollution Prevention Plan.
If you have any questions about the above information, please contact Corey Duke, Plant Supervisor at
704-788-7833 or me at 704-547-7076.
Sincerely,
Tony Johnson
Environmental Engineer
cc: Zahid Khan, NCDEQ-MRO
Corey Duke
CHARLOTTE REGIONAL OFFICE ® VULCAN CONSTRUCTION MATERIALS, L.L.C.
11020 David Taylor Drive, SUITE 105, CHARLOTTE, NC 28262, TELEPHONE [phone], FAX [phone]

ATTACHMENT 1
Vulcan Construction Materials, LLC
Cabarrus Quarry
2nd Period 2019 DMR Report

General Permit No. NCG020000
Calendar Year 2019
Certificate of Coverage No. NCG020172
Facility Name: Vulcan Construction Materials, LP/Cabarrus Quarry
0 r
County: Cabarrus
�
Phone Number: [phone] Total no. of SDOs monitored
`rn
Certified Laboratory Research & AnalVtical Laboratories, Inc. Lab # 34 -
Lab #
rr
Stormwater Discharge Outfall (SDO) No. 002 VMA Outfall? Yes El 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 ❑
No, turbidity benchmark exceedances did not require monthly monitoring ❑
Other ❑
Outfall No.
Total
Rainfall,
inches
TSS,
mg/I
SS,
mI/I
Turbidity,
NTU
Upstream
(U} Turbidity,
NTU
Downstream
(D} Turbidity,
NTU
Non -polar
O&G, mg/I
(VMA)
New
Motor Oil
Usage
al/ma'.
Stormwater
Benchmarks
Indicate NO
FLOWif
a /ica6le'
Circle
Benchmark
100/50
0.1
Circle
Benchmark
50/25/10
N/A
Water Quality
Standard applies
N/A
Water Quality'
Standard applies
15
>55 gaUmo.'
average requires
TSS and Non -polar
o&G monitoring
Date Sample
Collected
mo/dd/ r
�' �
n
g
��-
01/01/19 -
06/30/19
No Flow
12/17/19
0.22
75
<0.1
132
N/A
N/A
N/A
N/A
12/30/19
0.17
<5.0
<0.1
<1.0
N/A
N/A
N/A
N/A
Permit Date 10/1/2015 — 9/30/2020
Last Revised 10-2-2015

Certificate of Coverage No. NCG020172
Additional Outfall Attachment (make copies as needed for additional outfalis)
Stormwater Discharge Outfall (SDO) No. 005 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 ® C_
o
If this outfall was in Tier 2 last year, was monthly monitoring discontinued?
Yes, enough consecutive samples below benchmarks to decrease frequency 1
Yes, received approval from DEMLR to reduce monitoring frequency
No, turbidity benchmark exceedances did not require monthly monitoring ❑_
Other ❑
Outfall No.
Total
Rainfall r
inches
TSS
mg/1
SS,
ml/1
Turbidity,
NTU
Upstream
U Turbidity,
O
NTU
Downstream
D Turbidity,
O Yr
NTU '
Non -polar
O&G m /I
� g
(VMA)
New
Motor Oil
'Usage
al/mo.
Stormwater
Benchmarks
Indicate NO
FLOWif
applicable
Circle
Benchmark
100/50
0.1
Circle
Benchmark
50/25/10
NIA
Water Quality
Standard applies
NIA
Water Quality
Standard applies
15
'. >55 gal/Mo.
average requires
TSS and Non -polar
O&G monitorin
Date Sample
Collected
mo/dd/' r
01/01/19 —
06/30/19
No Flow
12/17/19
0.22
86.7
<0.1
161
N/A
N/A
N/A
NIA
12/30/19
0.17
<5.0
<0.1
<1.0
N/A
N/A
N/A
N/A
Certificate of Coverage No. NCG020172
Permit Date 10/1/2015 — 9/30/2020
Last Revised 10-2-2015

Additional Outfall Attachment (make copies as needed for additional outfalls)
Stormwater Discharge Outfall (SDO) No. VMA Outfall?
Yes ❑
No ❑
Is this outfall currently in Tier 2 for any parameter?
Yes ❑
No ❑
rT
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?
i
Yes, enough consecutive samples below benchmarks to decrease frequency
❑
b
Yes, received approval from DEMLR to reduce monitoring frequency
❑
0
No, turbidity benchmark exceedances did not require monthly monitoring
❑
00
Other
❑
9
9
Outfall No.
Total
Rainfall,
inches
TSS,
mg/I
SS,
ml/I
Turbidity,
NTU
Upstream
(U) Turbidity,
NTU
Downstream
(D) Turbidity,
NTU
Non -polar
P&G, mg/I
(VMA)
New
Motor Oil
Usage
" al/mo.
StOrmWater
Benchmarks
Indicate NO
FLOWif
applicable
Circle
Benchmark
100/50
0.1
Circle
Benchmark
50/25/10
N/A
Water Quality
Standard applies
N/A :.
Water Quality
Standard applies
15
>55 gallmo.
average requires
TSS and Non -polar
O&G monitoring
Date Sample.
Collected
mo/dd/ r
r,F ..rx
-
Certificate of Coverage No. NCG020172
Permit Date 10/1/2015 — 9/30/2020
Last Revised 10-2-2015

Certificate of Coverage No. NCG020172
"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 §122,22]
Signature _
Date Janu
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

ATTACHMENT 2
Vulcan Construction Materials, LLC
Cabarrus Quarry
2na Period 2019 Outfall Sampling
Second Sampling Event Analytical Report

tr � O �S I N G NO ?
Ana lyticol/Process COnsuffations
rff�tf ���QrAC}P�� �et�e
December 31, 2019
Vulcan N aterials Company/Cabarrus Qtutriry
PO Box +206
Concord, NC 28027
Attention: Corey Duke
Chemical Analysis for Selected Sampling Locations Identified as Vulcan Quarry - Caban—tis
(A Vulcan lylaterials Company Pro.iect, collected December 17, 2049)
Benchmark
002
Values
Date
Parameter
Method
Results
Units
Limit
Analyzed
Analvst
pI1
SM 4500 11 13-2000
7.1
SU
6.0 - 9.0
N/A
Per COC
Settable Matter
SM 2540 F-1997
<0,1
m1/L
0.1
12/18/19
AW
TSS
SM 2540 U-1997
75.0
111g/1
100
12/20/19
A
Turbidity
LTA 180.1
132
NTU
50
12/19/19
A
RAL Sample 11
76221-01
Date Collected
12/17/19
Time Collected
0831
Outtiill Number
002
mail- = milligrams per Liter = ports per million (I)pm)
SU = Standard Units
nil/L = milliliters per Liter
N/A = Not Applicable NTU = Nepthalomeu-ie Turbidity Units

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Analytical/Process Consultations
December 31, 2019
Vulcan Materials Company/Cabarrus Quarry
PO Box 5206
Concord, NC 28027
Attention: Corey Duke
Chemical Analysis for Selected Sampling Locations Identitied as Vulcan Quarry - Cabarrus
(A Vulean Materials Company Project, collected December 17, 20191
Benchmark
005
Values
Date
Parameter-
Method
Results
Units
Limit
Aftalyzed
Analvst
pH
SM 4500 I-I-PB-2000
7.6
SU
6.0 - 9.0
N/A
Per COC
Settable Matter
SM 2540 I~-1997
<0-1
ml/L
0.1
12/18/19
AW
TSS
SM 2540 D-1997
86.7
mg/1
100
12/20/19
AW
Turbidity
EPA 180.1
161
NTU
50
12/19/19
AW
RAL Sample 11
76221-02
Date Collected
12/17/19
Time Collected
0835
Outfall Number
005
mg/L = milligrams per Liter n parts her million (ppm)
SU = Standard Units
N/A = Not Applicable
ml/L = milliliters per Liter
N U = Nepthalometric "hurbidity Units

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r�rrt 'PIE o�AN,
,January H, 2020
Vulcan Materials Company/Cabarrus Q11a1•1-3,
110 Box 5206
Concord, NC 28027
Attention: Corey Dine
Cticinical Analysis for Selected Sampling Locations ldentilled as Villcatt Quarry - Cttbarrus
(A Vulcan Materials Company Project, collected December 30, 2019)
I3enclntark
002
Values
Date
Parameter
Method
Restults
units
Limit
Analvzed
Anaivst
pl l
SIM 4500 I1+13-2000
T7
sU
6.0 - 9.0
N/A
Per COC
Settable Matter
SM 2540 F-1997
<0.I
ml/l-
0.1
01/01/20
SK
TSS
Sill 2540 D-1997
<5.0
1n,01
100
01/02/20
AW
Turbidity
EPA 150.1
< 1
NTU
50
01 /01 /20
SK
RAt. Sampic i 76572-01
Date Collcctcd 12/301/19
Time Collected O850
Outftll Number 002
malt. milligrams per titer = parts her million (phm)
SU = Standard Chits
1111/1. — milliliters per Liter
N/A Not Applicable N1 U Ncptlydometri<"I'tn•bidita Units

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1 NC Z:
Analytical/Process Consultations,'
Jammi-y 8, 2020
Vulestn iN'laterials Coil] haoy/C.1bat-rus Quarry
PO Box 5206
Concord, NC 28027
Attention: Corey Duke
Chemical Analysis For Selected Sampling Locations Identified as Vulcan Quarry - Cabat•rus
L1 Vide an tNlatei ials_Compmy Project, collected December 30, 2019)
Benclunarh
(105
Values
Date
Parameter
Method
results
Units
Limil
Analyzed
Analyst
pI1
SNM 4500 1I-1-13-2000
7.7
SU
6.0 - 9.0
N/A
NJ- COC
Settablc Matter
SN't 2540 F-1997
<0.1
mUL
0,1
01/01/20
SK
TSS
SIM 2540 D-1997
<45.0
111,/1
100
01/02/20
A
'I'llI-bidity
IPA 180.1
<I
NTCJ
50
01/01,`20
SIB
RAL sample 11
76572-02
Date Collected
12/30/19
Time Collected
0850
C3tUlltll Number
005
mg/L milligrams per Liter = parts per million (ppm)
SU = Standard Units
N/A = Not Applicable
1111=1_ milliliters per Liter
N`I ll -- Nepthalometric l`urbidity Units

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