NCS000329_Tier 2 Monitoring_20210818

41k ATI
August 12, 2021 P.O. Box 5030
2020 Ashcraa Avenue
Monroe, NC 28111-5030
Division of Energy Mineral and Land Resources GG1 �/� Phone: (704) 289-
Fax: [phone]I94
Attn: Central Files 1, Email: [e-mail]
1617 Mail Service Center PS`"iQ=�F 1,
Raleigh, NC 27699-1617 RP ;
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Central Files: Tier 2 Monthly Monitoring- July 2021
Attached, please find stormwater monitoring data for Permit No NCS000329. The originals and
one copy are included. The monitoring data is for the following monitoring schedule:
Analytical monitoring includes:
• Outfall #01 (B), commingled stormwater
• Outfall #02 (B), non -commingled stormwater
• Outfall #03 (B), non -commingled stormwater
If you have any questions or need additional information, please contact me at 704-289-4511
x3800. Thank you.
Sincerely,
Michael McManus
EHS Coordinator

ATI (Allvae) — Bakers Campus (BNO)
Stormwater (Monitoring Report Form
Sample Date: n �-
Sample Time:
Sample Location: a 01,17 It
Stormwater Discharge Outfall # 01 (Commingled)
Drainage Area= 2,915,470 sq. ft. = 69 Acres
% Impervious= 34%
Person Collecting Samples:
Laboratory Performing Analysis:
Analytical Techniques and Methods:
40 CFR Part 136
Results of Sample Analysis:
Parameter
Results (mg/1)
Benchmark Values (m i�.
TSs
100
BOD
/d /1 C
30
COD
n
er%a Ot
120
Cadmium
6eAlee.IL
0.003
Chromium
�%
0.905
Total Calcium
915
Total Copper
�ohJ
0.01
Total Nickel
0.335
Total Zinc
0.126
pH
(std units)
6-9
Temperature
Deg. Celsius
Total Residual Chlorine
.017
Oil and Grease
15
Storm Date: Storm Duration: (Hrs.) inches of Rainfall:
Duration of time preceding rain event exceeding 0.1": (Hrs.)
Estimated Flow Calculation:
Q=CIA
Q (Total) = Q (Pervious Area) + Q (Impervious Area)
Rev. 01
Date of Rev.: 1/22/2020

ATI (Allivac) -- Bakers Campus (B O)
Stormwater Monitoring Report Form
iot., cis) = (A x inches rain/12 inches/ft. x 69 acres x .66) + (.9 x inches rain/12 incises/ft. x 69 x .34.)
Q (i offal, cfs)=1.15180 x (Inches of rain) + 1.7595 x (inches of rain)
cfs
Rev. 01
Bate of Rev.: 1/22/2020

ATI (Allvac) — Bakers Campus (BNO)
Stormwater Monitoring Report Form
Sample Date: er 0 Ss�. j
Sample Time:
Sample Location: aQa %
Stormwater Discharge Outfall # 02 (Non -
Commingled)
Drainage Area= 212,952 sq. ft. = 4.9 Acres
% Impervious=12%
Person Collecting Samples:
Laboratory Performing Analysis:
Analytical Techniques and Methods:
40 CFR Part 136
Results of Sample Analysis:
Parameter
Results (mg/1)
Benchmark Values (mg/1)
TSS
100
BOD
1 D eel
30
COD
�, a
Cri eri'a.
120
Cadmium
Deer a by 6 erc
0.003
Chromium
/•
0.905
Total Calcium
915
Total Copper
No /- o /
0.01
Total Nickel
0.335
Total Zinc
0.126
pH
(std units)
6-9
Temperature
Deg. Celsius
Storm Date: Storm Duration: (Hrs.) Inches of Rainfall:
Duration of time preceding rain event exceeding 0.1": (Hrs.)
Estimated Flow Calculation:
Q=CIA
Q (Total) = Q (Pervious Area) + Q (Impervious Area)
Q (Tot., cfs) = (A x inches rain/12 inches/ft. x 4.9 acres x .88) + (.9 x inches rain/12 inches/ft. x 4.9 x .12)
Rev. 01
Date of Rev.: 1/22/2020

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s13
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:ATI
Specialty Materials
ATI (Allvac) — Bakers Campus (BNO)
Stormwater Monitoring Report Form
Sample Date: Ven�
Sample Time:
Sample Location:
Stormwater Discharge Outfall # 03 (Non -
Commingled)
Drainage Area= 336,580 sq. ft. = 7.8 Acres
% Impervious= 15%
Person Collecting Samples:
Laboratory Performing Analysis:
Analytical Techniques and Methods:
40 CFR Part 136
Results of Sample Analysis:
Parameter
Results (mg/1)
Benchmark Values (mg/I)
T55
100
BOD
/ Cf
30
COD
74
120
Cadmium
G d
0.003
Chromium
a
0.905
Total Calcium
915
Total Copper
Did
0.01
Total Nickel
0.335
Total Zinc
0.126
pH
(std units)
6-9
Temperature
Deg. Celsius
Storm Date: Storm Duration: (Hrs.) Inches of Rainfall:
Duration of time preceding rain event exceeding 0.1": (Hrs.)
Estimated Flow Calculation:
Q=CIA
Q (Total) = Q (Pervious Area) + Q (Impervious Area)
Q (Tot., cfs) = (A x inches rain/12 inches/ft. x 7.8 acres x .85) + (.9 x inches rain/12 inches/ft. x 7.8 x .15)
Rev. 01
Date of Rev.: 1/22/2020

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sp
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STORMWATER DISCHARGE OUTFALL ;SDO)
MONITORING REPORT
VPrmK Nulmber NCS��Q�j� _ SAMPLES COLLECTED DURING CALENDAR YEAR: _
(This monitoring report shall be received by the Division no later than 3A alayn ,6 6,o,
the date the facility receives the sampling results from the laboratory.)
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SIGNATURE OF PERMITTEE OR DESIGNEE
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