NC0086169_Issuance of Permit_20081029

,
�O W'4 ,9p Michael F.Easley,Governor
W0 G William G.Ross Jr.,Secretary
O
r North Carolina Department of Environment and Natural Resources
—i
p Coleen H.Sullins,Director
Division of Water Quality
October 29, 2008
Mr. Scot M. Lachowicz
Corning, Inc.
14556 Hwy 601
Midland, N.C. 28107
Subject: Issuance of NPDES Permit NC0086169
Midland Plant WWTP
Cabarrus County
Dear Mr. Lachowicz:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly,we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum
of Agreement between North Carolina and the U.S. Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
If any parts,measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty(30)days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-
6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Quality or permits required by the Division of Land Resources, the Coastal Area Management Act
or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Tom Belnick at telephone number
[phone].
4cerely,
c---04/1 •,...,
oleen H. Sullins
7
cc: Central Files
NPDES File
Mooresville Regional Office/Surface Water Protection
Aquatic Toxicology Unit 1�
N r Carolina
Xatura!!y
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh,NC 27699-1617 Phone[phone] Customer Service
Internet: www.ncwaterqualitv.org Location: 512 N.Salisbury St. Raleigh,NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

Permit NC0086169
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission,and
the Federal Water Pollution Control Act, as amended,
Corning, Incorporated
is hereby authorized to discharge wastewater and stormwater from a facility located at the
Midland Plant WWTP
U.S. Highway 601
Midland
•
Cabarrus County
to receiving waters designated as an unnamed tributary to Muddy Creek (outfall 001), an
unnamed tributary to Clear Creek (outfall 002) and the Rocky River (outfall 003) in the Yadkin-
Pee Dee River Basin in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III, and IV hereof.
The permit shall become effective December 1, 2008.
This permit and the authorization to discharge shall expire at midnight on October 31, 2013.
Signed this day October 29, 2008. •
4141 4(141
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0086169
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked,
and as of this issuance, any previously issued permit bearing this number is no longer effective.Therefore,
the exclusive authority to operate and discharge from this facility arises under the permit conditions,
requirements,terms, and provisions included herein.
CORNING INCORPORATED IS HEREBY AUTHORIZED TO:
1. Continue operation of a 0.107 MGD wastewater treatment facility (outfall 003) located
at the Midland Plant WWTP off U.S. Highway 601 near Midland in Cabarrus County.
The wastewater treatment facility includes the following treatment components:
• Equalization tank
• Off-spec tank
• Two Lamella clarifier
• Two neutralization tanks
• Neutralization transfer tank
• Chloride stabilization tank
• Surge blend tank
2. After receiving Authorization to Construct from the Division of Water Quality,
construct and operate facilities for the discharge of up to 0.142 MGD through outfall
003; and
3. Discharge stormwater, boiler blowdown, and non-contact cooling water from a wet
detention pond into an unnamed tributary of Clear Creek (outfall 002); discharge
stormwater from a wet retention pond into an unnamed tributary of Muddy Creek
(Outfall 001 — See Part I, Section A, Number 8 - Stormwater Monitoring, Controls
and Limitations for Permitted Discharges, for monitoring requirements); and
discharge process wastewater, cooling tower blowdown, and carbon filter backwash
from the above referenced treatment works at the location specified on the attached
map into the Rocky River (Outfall 003). All receiving streams are classified C waters
in the Yadkin-Pee Dee River basin.

Corning Incorporated - NCO086169 Facility
USGS Quad Name: Waco Location
Receiving Stream: See above
Stream Class: C
Subbasin: Yadkin - 030712 North Not to SCALE

Permit NCO086169
Part I. Section A
1. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (002)
During the period beginning on the effective date of this permit and lasting until permit expiration, the
Permittee is authorized to discharge from outfall 002 [Stormwater, Humidification Boiler Blowdown, and
Non -Contact Cooling Water]. Such discharges shall be limited and monitored by the Permittee as specified
below:
Parameter
Limits
Monitoring Requirements
Monthly
Average
Daily Average
Measurement
Frequency
Sample
Type
Sample
Locationl
Flow
Semi-annually
Estimate
Effluent
Temperature2
Semi-annually
Grab
Effluent
Total Residual
Chlorine
Semi-annually
Grab
Effluent
pH
> 6.0 and < 9.0 Standard Units
Semi-annually
Grab
Effluent
Notes.1.
The effluent for this outfall shall mean a point upstream of the mixing point with atormwater.
2. The temperature of the effluent will be regulated so that the temperature of the receiving stream does
not increase more than 2.8'C above the natural water temperature. Receiving water temperature will
not exceed a maximum of 32'C.
There shall be no chromium, zinc or copper added to the treatment system except as pre -approved additives
to biocidal compounds.
The permittee shall obtain authorization from the Division prior to the use of biocide in the cooling water.
The permittee shall notify the Director in writing at least ninety (90) days prior to instituting use of any
additional biocide in the treatment system which may be toxic to aquatic life (other than biocides previously
reported to the Division). Such notification shall include completion of Biocide Worksheet 101 and a map .
indicating the discharge point and receiving stream.
Conditions related to the stormwater portion of this outfall can be found in Part I, Section A, Number 8 -
Stormwater Monitoring, Controls and Limitations for Permitted Discharges.
SEE PART I, SECTION A, NUMBER 9 - ANNUAL SHUTDOWN PROCEDURES CONDITION. -
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

Permit NC0086169
2. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(003 AT 0.107 MGD)
During the period beginning on the effective date of the permit and lasting until expansion beyond 0.107
MGD or permit expiration, the Permittee is authorized to discharge from outfall 003 [Industrial Process
Wastewater, Non-contact Cooling Water, and Carbon Filter Backwash]. Such discharges shall be limited
and monitored by the Permittee as specified below:
Parameter Limits Monitoring Requirements
Monthly Daily Measurement Sample Sample
Average Average Frequency Type Locationl
Flow 0.107 MGD Continuous Estimate Effluent
Total Residual 28 µg2 2/Week Grab Effluent
Chlorine2
Chloride 2/Week Composite Effluent
Total Suspended 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
Solids
Temperature3 Weekly Grab Effluent
pH >6.0 and<9.0 Standard Units Weekly Grab Effluent
Total Cadmium Quarterly Grab Effluent
Total Copper Quarterly Grab Effluent
Total Zinc Quarterly Grab Effluent
Total Phosphorus Quarterly Composite Effluent
Chronic Toxicity4 Quarterly Composite Effluent
Pollutant Analysis See Part I, Section A, Number 6 of this permit Effluent
Notes:
1. The compliance point for flow shall be upstream of the non-contact cooling water and boiler blowdown
internal outfall. The compliance point for all other parameters shall be at the Rocky River discharge
location.
2. The Permittee shall report all effluent TRC values reported by a NC-certified laboratory [including field-
certified]. Effluent values below 50 gg/L will be treated as zero for compliance purposes.
3. The temperature of the effluent will be regulated so that the temperature of the receiving stream does
not increase more than 2.8°C above the natural water temperature. Receiving water temperature will
not exceed a maximum of 32°C.
4. Chronic Toxicity(Ceriodaphnia)at 1.0%;January,April,July and October [see A(4)].
SEE PART I,SECTION A,NUMBER 9-ANNUAL SHUTDOWN PROCEDURES CONDITION
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

Permit NC0086169
3. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(003 AT 0.142 MGD)
During the period beginning upon expansion beyond 0.107 MGD and lasting until expiration, the
Permittee is authorized to discharge from outfall 003 [Industrial Process Wastewater, Non-contact Cooling
Water, and Carbon Filter Backwash]. Such discharges shall be limited and monitored by the Permittee as
specified below:
Parameter Limits Monitoring Requirements
Monthly Daily Average Measurement Sample Sample
Average Frequency Type Locationl
Flow 0.142 MGD Continuous Estimate Effluent
Total Residual 28µg/L 2/Week Grab Effluent
Chlorine2
Chloride 2/Week Composite Effluent
Total Suspended Solids 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
Temperature2 Weekly Grab Effluent
pH >6.0 and<9.0 Standard Units Weekly Grab Effluent
Total Cadmium Quarterly Grab Effluent
Total Copper Quarterly Grab Effluent
Total Zinc Quarterly Grab Effluent
Total Phosphorus Quarterly Composite Effluent
Chronic Toxicity3 Quarterly Composite Effluent
Pollutant Analysis See Part I, Section A,Number 6 of this permit Effluent
Notes:
1- The compliance point for flow shall be upstream of the non-contact cooling water and boiler blowdown
internal outfall. The compliance point for all other parameters shall be at the Rocky River discharge
location.
2. The Permittee shall report all effluent TRC values reported by a NC-certified laboratory [including field-
certified]. Effluent values below 50µg/L will be treated as zero for compliance purposes.
3. The temperature of the effluent will be regulated so that the temperature of the receiving stream does
not increase more than 2.8°C above the natural water temperature. Receiving water temperature will
not exceed a maximum of 32°C.
4. Chronic Toxicity(Ceriodaphnia)at 1.7%;January,April,July and October [see A. (5)].
SEE PART I,SECTION A,NUMBER 9-ANNUAL SHUTDOWN PROCEDURES CONDITION
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

Permit NC0086169
4. CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY TEST AT 0.107 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 1.0%.
The permit holder shall perform at a minimum, Quarterly monitoring using test procedures outlined in the'North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,' Revised February 1998, or subsequent versions or
'North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure' (Revised-February 1998) or subsequent
versions.The tests will be performed during the months of January,April,July, October. Effluent sampling for this
testing shall be performed at the NPDES permitted fmal effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple-concentration testing shall be performed at a minimum, in each of the two following months
as described in'North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure' (Revised-February 1998)
or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The defmition of 'detectable impairment,' collection
methods, exposure regimes, and further statistical methods are specified in the 'North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised-February 1998)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR/ DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of'No
Flow' in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Permit NC0086169
5. CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY TEST AT 0.142 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 1.7%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the`North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,' Revised February 1998, or subsequent versions or
`North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedures (Revised-February 1998) or subsequent
versions.The tests will be performed during the months of January,April,July, October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple-concentration testing shall be performed at a minimum, in each of the two following months
as described in`North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure' (Revised-February 1998)
or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The defmition of 'detectable impairment,' collection
methods, exposure regimes, and further statistical methods are specified in the'North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure' (Revised-February 1998)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR/ DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of'No
Flow' in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Permit NC0086169
6. POLLUTANT ANALYSIS CONDITION
The Permittee shall conduct a test for pollutants once per permit cycle at the effluent from the treatment plant.
The discharge shall be evaluated as follows:
1) A pollutant analysis of the effluent must be completed using EPA approved methods for the following analytic
fractions:
(a) purgeables(i.e.,volatile organic compounds);
(b) acid extractables;
(c) base/neutral extractables;
(d) organochlorine pesticides and PCBs;
(e) herbicides;and
(I) metals and other inorganics.
The Annual Pollutant Analysis Monitoring (APAM) Requirement Reporting Form A and accompanying memo
describes the sampling and analysis requirements and lists chemicals to be included in the pollutant
analysis. This monitoring requirement is to be referred to as the "Pollutant Analysis Monitoring Requirement"
(PAM).
2) Other significant levels of organic chemicals must be identified and approximately quantified. For the
purpose of implementing this requirement, the largest 10 GC/MS peaks in the purgeable, base/neutral
extractable, and acid extractable fractions (or fewer than 10 if less than 10 unidentified peaks occur) for
chemicals other than those specified on the APA Requirement Reporting Form A should be identified and
approximately quantified as stated in the APAM Reporting Form A instructions. This part (item 2) of the
APAM requirement is to be referred to as the "10 significant peaks rule").
7. BIOLOGICAL MONITORING CONDITION
After completion of the expansion to 0.142 MGD, the Permittee shall conduct an upstream and downstream
benthic macroinvertebrate survey. This survey should be conducted between the months of June and September.
A report of the survey's findings shall be included with the next permit renewal application after the expansion is
completed.
For technical assistance regarding this permit requirement, please contact the Division's Biological Assessment
Unit at(919)733-6946.

Permit NC0086169
8. STORMWATER MONITORING, CONTROLS AND LIMITATIONS FOR PERMITTED DISCHARGES
FINAL LIIIIITATIONS AND CONTROLS FOR STORMWATER DISCHARGES
During the period beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge stormwater associated with industrial activity from outfalls 001 and 002. Such
discharges shall be controlled, limited and monitored as specified below.
1. Stormwater Pollution Prevention Plans
The permittee shall develop and continue to update a Stormwater Pollution Prevention Plan, herein after
referred to as the Plan. The Plan shall be considered public information in accordance with Part III, Standard
Conditions,Section E.10. of this permit. The Plan shall include, at a minimum, the following items:
a. Site Plan: The site plan shall provide a description of the physical facility and the potential pollutant
sources which may be expected to contribute to contamination of regulated stormwater discharges. The
site plan shall contain the following:
(1) A general location map (USGS quadrangle map, or appropriately drafted equivalent map),
showing the facility's location in relation to transportation routes and surface waters, and the
name of the receiving water(s) to which the stormwater outfall(s)discharges. If the discharge is to
a municipal separate storm sewer system, the name of the municipality and the ultimate
receiving waters,and accurate latitude and longitude of the point(s)of discharge must be shown.
(2) A narrative description of storage practices, loading and unloading activities, outdoor process
areas,dust or particulate generating or control processes, and waste disposal practices.
(3) A site map (or series of maps) drawn to scale with the distance legend indicating location of
industrial activities (including storage of materials, disposal areas, process areas, and loading
and unloading areas), drainage structures, drainage areas for each outfall and activities occurring
in the drainage area, building locations and impervious surfaces, the percentage of each drainage
area that is impervious. For each outfall, a narrative description of the potential pollutants which
could be expected to be present in the regulated stormwater discharge.
(4) A list of significant spills or leaks of pollutants that have occurred at the facility during the 3
previous years and any corrective actions taken to mitigate spill impacts.
(5) Certification that the stormwater outfalls have been evaluated for the presence of non-stormwater
discharges. The certification statement will be signed in accordance with the requirements found
in Part III, Standard Conditions, Section B.11.
b. Stormwater Management Plan: The stormwater management plan shall contain a narrative description of
the materials management practices employed which control or minimize the exposure of significant
materials to stormwater, including structural and non-structural measures. The stormwater
management plan, at a minimum, shall incorporate the following:
(1) A study addressing the technical and economic feasibility of changing the methods of operations
and/or storage practices to eliminate or reduce exposure of materials and processes to
stormwater. Wherever practicable the permittee should consider covering storage areas, material
handling operations, manufacturing or fueling operations to prevent materials exposure to
stormwater. In areas where elimination of exposure is not practicable, the stormwater
management plan shall document the feasibility of diverting the stormwater runoff away from
areas of potential contamination.
(2) A schedule to provide secondary containment for bulk storage of liquid materials, storage of
Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) water
priority chemicals, or storage of hazardous materials to prevent leaks and spills from
contaminating stormwater runoff. If the secondary containment devices are connected directly to
stormwater conveyance systems, the connection shall be controlled by manually activated valves
or other similar devices [which shall be secured with a locking mechanism) and any stormwater