NCG030567 DMR SW (9)

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG030000
Date submitted 3- 1 -I(p /
CERTIFICATE OF COVERAGE NO. NCGO3 D 512 SAMPLE COLLECTION YEAR 4010
FACILITY NAME I (2-f`& p 11Gr SAMPLE PERIOD ❑Jan-June ❑July-Dec
.l(
COUNTY ( J or [Monthlys 3iLr !. (month)
PERSON COLLECTING SAMPLES , ( scat, DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY r V L,'—MG. Lab'Cert.# [Zero-flow LIWater Supply OSA
Comments on sample chi ection or analysis: [Other C I((S5 c
PLEASE REMEMBER TO SIGN ON PAGES 2 AND/OR 3
Part A: Stormwater Benchmarks and Monitoring Results
❑ No discharge this period?2
Non-Polar O&G/
Date Sample 24-hour rainfall pH, Total Toxic
Outfall No. Collected1 amount, Total Suspended Solids Standard units Copper Lead Zinc Total Petroleum Organicss
(mo/dd/yr) Inches3 Hydrocarbons
Benchmarks===> - - 100 mg/L or 50 mg/1.4 6.0—9.0 0.007 mg/L 0.03 mg/L 0.067 mg/L 15 mg/L 1 mg/L
L(0 1.05 (/ G. 0.0054 L 0.03 .5.35354. ,C IS,��IL 1, ✓e
1 Monthly sampling(instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit,Table 3 identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
5 Total Toxic Organics sampling is applicable only for those facilities which perform metal finishing operations, manufacture semiconductors, manufacture
electronic crystals,or manufacture cathode ray tubes. For purposes of this permit the definition of Total Toxic Organics is that definition contained in the EPA
Effluent Guidelines for the facility subject to the requirement to sample(for metal finishing use the definition as found in 40 CFR 433.11;for semiconductor
manufacture use the definition as found in 40 CFR 469.12;for electronic crystal manufacture use the definition as found in 40 CFR 469.22;and for cathode ray
tube manufacture use the definition found in 40 CFR 469.31).•
FCP NED
Annr 09 2016
Permit Date:11/1/2012-10/31/2017 ti-N} 4 ,r0 QLJ/\UTA( SWU-245,last revised 10/25/2012
l(r2RINgraRl iVi;alNO Page 1 of 3

Note: If you report a sample value in excess of the benchmark,you must implement Tier 1, Tier 2,or Tier 3 responses. See General Permit text.
FOR PART A AND PART B MONITORING RESULTS:
O A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
G 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SECTION B.
e TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES I['NO❑
IF YES,HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑NO Tc
REGIONAL OFFICE CONTACT NAME:
Mail an original and one copy of this DMR,including all"No Discharge"reports within 30 days of receipt of the lab results(or at end of monitorina period
in the case of"No Discharge"reports)to:
Division of Water Quality
Attn:DWQ Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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 per- '-s for submitting false information,including the possibility of fines and imprisonment for knowing violations."
(Signature o ,permittee) ate)
Permit Date:11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
Page 3 of 3

Division of Energy, Mineral and Land Resources ("DWR")
Attn: Stormwater Permitting
1612 Mail Service Center
Raleigh,North Carolina 27699-1612
Attn: Bradley Bennett, Program Manager
Re: Notification of Tier III Zinc Exceedance
To Whom it May Concern,
In regards to our COC number NCG030567,recent stormwater sampling results indicate that
zinc levels are above permit limitations for the fourth time during the term of this permit. The
zinc level for reported for June 28, 2016 was 0.538 mg/1 while the benchmark should be no more
than 0.067 mg/l. During the sample period in question,there were no non-storm water
discharges to the outfall, or any material handling or other activities not authorized by our
permit.
Since the discovery of the zinc exceedance we have engaged a wide range of Caterpillar staff to
avoid future zinc exceedances, including upper management, Divisional EHS staff and our Legal
Services Division. We take this situation seriously and are actively working to prevent future
exceedances. Both internal and external housekeeping efforts have been improved. We have
sampled water collected from outdoor secondary containments as well. This water will be
collected and treated by waste management contractors instead of being discharged to outfalls.
Additionally, we continue to investigate all other possible sources of the zinc that may be
impacting our stormwater samples.
In summary, our investigation team is actively seeking out the root cause of this issue. Once the
root cause is identified, we will put an effective corrective action plan in place to prevent future
instances of non-compliance.
If you have any questions,please do not hesitate to call me at(828)-584-1943.
Best Regards,q-6^ nnQ
676P
Amy George
EHS Coordinator
Caterpillar Inc.

Semi-annual Stormwater D19charge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG030000
Date submitted 3- I — 16
CERTIFICATE OF COVERAGE NO.Ila
5 /7 SAMPLE COLLECTION YEAR ad Ko
FACILITY NAME calF p(//Q, .{X� SAMPLE PERIOD ❑Jan-June ❑July-Dec
COUNTY 13/ p(1,-)0, orEi onthly1 c )C.LJ (month)
PERSON COLLECTING SAMPLES,�� �- ( ri DISCHARGING TO CLASS ❑ORW [:11-1Q1 ❑
QW Trout ❑PNA
LABORATORYBlU llt'..r La b5 Lab c rt < 75- ❑Zero-flow ❑Water Supply OSA
Comments on sample collection or analysis: ❑Other
Arahorb6, -to Oef ,5ample, mir, 33 mine,d- RECEIVED
EASE REMEMBER TO SIGN ON PAGES 2 AND/OR 3 a
am',If; 0 9 20,6
Part A: Stormwater Benchmarks and Monitoring Results DEN►lei-LAND �
,STORili1iltm„0QUALITY I i o discharge this period?2
,1 u�'il I I N(' -
Non-Polar O&G/
Date Sample 24-hour rainfall pH, Total Toxic
Outfall No. Collected) amount, Total Suspended Solids Standard units Copper Lead Zinc Total Petroleum Organics
(mo/dd/yr) Inches3 Hydrocarbons
Benchmarks===> - - 100 mg/L or 50 mg/L4 6.0-9.0 0.007 mg/L 0.03 mg/L 0.067 mg/L 15 mg/L 1 mg/L
1 Monthly sampling(instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit,Table 3 identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
5 Total Toxic Organics sampling is applicable only for those facilities which perform metal finishing operations, manufacture semiconductors, manufacture
electronic crystals, or manufacture cathode ray tubes. For purposes of this permit the'definition of Total Toxic Organics is that definition contained in the EPA
Effluent Guidelines for the facility subject to the requirement to sample(for metal finishing use the definition as found in 40 CFR 433.11;for semiconductor
manufacture use the definition as found in 40 CFR 469.12;for electronic crystal manufacture use the definition as found in 40 CFR 469.22;and for cathode ray
tube manufacture use the definition found in 40 CFR 469.31).
Permit Date: 11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
Page 1 of 3

Note: ij, a report a sample value in excess of the benchmark,you must imp—sent Tier 1, Tier 2,or Tier 3 responses. See General Permit text.
FOR PART A AND PART B MONITORING RESULTS:
• A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SE ION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES 12 NO❑
IF YES,HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑ NO E?1
REGIONAL OFFICE CONTACT NAME:
Mail an original and one copy of this DMR,including all"No Discharge"reports, within 30 days of receipt of the lab results(or at end of monitoring period
in the case of"No Discharge"reports)to:
Division of Water Quality
Attn: DWQ Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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."
‘/ /
tE ,7
(Signature of Pe. ittee) (D.te)
Permit Date:11/1/2012-10/31/2017 SWU-245,last revised 10/25/2012
Page 3 of 3