NC0086169_Permit (Modification)_20011031

• Slate of North Carolina
Department of Environment
and Natural Resources •
Division of Water Quality
Michael F. Easley, Governor
William G. Ross,Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director NCDENR
October 31,2001
Ms.Christy L.Hannan
Corning Incorporated
P.O.Box 1700
Concord,North Carolina 28026-1700
Subject: Modification of NPDES Permit NC0086169
Midland Plant
Cabarrus County
Dear Ms. Hannon:
Division personnel have reviewed and approved your request for modification of the subject permit. Accordingly,we
are forwarding this revised NPDES permit. This permit modification 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 May 9,1994(or as subsequently amended).
Changes to the permit include:
> As stated in your previous correspondence,a priority pollutant analysis is required once per permit cycle. The
current permit cycle began on May 1,2000 and ends on October 31,2003. Any pollutant analysis conducted within
this time frame is considered within the permit cycle.
➢ The flow limit for flush water in Special Condition A. (9.)has been increased to 250,000 gallons per day. Coming's
Annual Shutdown Procedures should include the provision that both cooling towers should not be flushed at the
same time.
> Special condition A. (7.)has been modified. Biological monitoring may be conducted after completion of the
expansion but must be completed prior to submitting the application for renewal of the NPDES permit in 2003.
If any parts,measurement frequencies or sampling requirements contained in this permit modification 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 Michael Myers at telephone number(919) 733-5083,extension 508.
Sincerely
Original Signed By
David A. Goodrich
Gregory J.Thorpe,Ph.D.
Acting Director
cc: Mooresville Regional Office/Water Quality Section
Point Source Compliance Enforcement Unit
Technical Assistance&Certification Unit
Aquatic Toxicology Unit
Central Files
NPDES Files
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617-TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER- 50%RECYCLED/ 1 0%POST-CONSUMER PAPER
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES

Permit NC0086169
4.
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 provision 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 from a facility located at the
Midland Plant
U.S. Highway 601
near Midland
Cabarrus County
to receiving waters designated as an unnamed tributary of Muddy Creek (outfall 001),an unnamed tributary
of 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.
This permit shall become effective December 1,2001. •
This permit and authorization to discharge shall expire at midnight on October 31,2003.
Signed this day October 31,2001.
Original SignedBy
David A. Goodrich
Gregory J.Thorpe,Ph.D.,Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC00861t9 •
SUPPLEMENT TO PERMIT COVER SHEET
Corning Incorporated is hereby authorized to:
1. Continue operation of a 0.107 MGD wastewater treatment facility (outfall 003) located at the Corning
Incorporated Midland Plant off U.S. Highway 601 near Midland in Cabarrus County. The wastewater
treatment facility consists of the following treatment units:
• 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 and boiler blowdown 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 A. (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.

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j i County BoundaryFacili Information
• NPDES discharger Corning Incorporated State Grid: 16 NE and G 17 NW
N Hydrography NC0086169 USGS Quad: Midland and Stanfield
A/Highway Subbasin: 03-07-12
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Permit NC0086169
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 serial number 002—Stormwater and Humidification Boiler Blowdown. Such
discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics Limits Monitoring Requirements
Monthly Daily Measurement Sample Type Sample
Average Average Frequency Location l_
Flow Semi-annually Estimate Effluent
Temperature2 Semi-annually Grab Effluent
Total residual chlorine Semi-annually Grab Effluent
Footnotes:
1. The effluent for this outfall shall mean a point upstream of the mixing point with stormwater.
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.
See Special Condition A. (9.)Annual Shutdown Procedures Condition.
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.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Conditions related to the stormwater portion of this outfall can be found in A. (8.) Stormwater Monitoring,Controls
and Limitations for Permitted Discharges.

1
Permit NC00861759
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (003 at 0.107)
During the period beginning on the effective date of the permit and lasting until expansion beyond 0.107 MGD,the
Permittee is authorized to discharge from outfall serial number 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:
Effluent Characteristics Limits Monitoring Requirements
Monthly Daily Measurement Sample Type Sample
Average Average Frequency Location!
Flow 0.107 MGD Continuous Estimate Effluent'
Total Residual Chlorine 2814/L 2/Week Grab Effluent
Chloride 2/Week Composite Effluent
Total Suspended Solids 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
Temperature' Weekly Grab Effluent
pH3 Weekly Grab Effluent
Cadmium"' Monthly Grab Effluent
Copper"' Monthly Grab Effluent
Zinc Monthly Grab Effluent
Total Phosphorus Quarterly Composite Effluent
Chronic Toxicitys Quarterly Composite Effluent
Pollutant Analysis' 6 b Effluent
Footnotes:
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 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.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. After seven sampling events the permittee,may request (in writing) that the Division evaluate this parameter and
modify the permit accordingly.
5. Chronic Toxicity(Ceriodaphnia) at 1.0%;January,April,July and October(see A. (4.)).
6. See A. (6.) Pollutant Analysis Condition.
See Special Condition A. (9.)Annual Shutdown Procedures Condition
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Defintions:
MGD—Million gallons per day mg/L—Milligram per liter
µg/L—Micrograms per liter

Permit NC0086169
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (003 at 0.142)
During the period beginning upon expansion beyond 0.107 MGD and lasting until expiration,the Permittee is
authorized to discharge from outfall serial number 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:
Effluent Characteristics Limits Monitoring Requirements
Monthly Daily Measurement Sample Type Sample
Average Average Frequency Location'
Flow 0.142 MOD Continuous Estimate Effluent'
Total Residual Chlorine 28 itg/L 2/Week Grab Effluent
Chloride 2/Week Composite Effluent
Total Suspended Solids 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
Temperaturee Weekly Grab Effluent
pH3 Weekly Grab Effluent
Cadmium4 Monthly Grab Effluent
Copper4 Monthly Grab Effluent
Zinc4 Monthly Grab Effluent
Total Phosphorus Quarterly Composite Effluent
Chronic Toxicity' Quarterly Composite Effluent
Pollutant Analysisb 6 b Effluent
Footnotes:
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 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.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. After seven sampling events the permittee,may request (in writing) that the Division evaluate this parameter and
modify the permit accordingly.
5. Chronic Toxicity(Ceriodaphnia) at 1.7%;January,April,July and October(see A. (5.)).
6. See A. (6.) Pollutant Analysis Condition.
See Special Condition A. (9.)Annual Shutdown Procedures Condition
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Definitions:
MGD—Million gallons per day mg/L—Milligram per liter
µg/L—Micrograms per liter

Permit NC0086169
•
A. (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 Ceriodapbnia 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
Ceriodapbnia 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
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 definition 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 Branch
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.
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
4
A. (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 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
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 definition 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 Branch
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.
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 NC00861 g9
4
A. (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
(1) 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
exractable 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").
A. (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
findings of this survey shall be completed and included with the permit application package at the time of permit renewal.
For technical assistance regarding this permit requirement,please contact the Division's Biological Assessment Unit at(919)
733-6946.
A. (8.) STORMWATER MONITORING, CONTROLS AND LIMITATIONS FOR
PERMITTED DISCHARGES
FINAL LIMITATIONS 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:

Permit NC0086169
(1) A general location map(USGS quadrangle map,or approriatel 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 that accumulates in the containment area shall be at a minimum
visually observed prior to release of the accumulated stormwater. Accumulated stormwater shall be
released if found to be uncontaminated. Records documenting the individual making the observation,the
description of the accumulated stormwater and the date and time of the release shall be kept for a period of
five years.
(3) A narrative description of Best Management Practices(BMPs)to be considered such as,but not limited to,
oil and grease separation,debris control,vegetative filter strips,infiltration and stormwater detention or
retention,where necessary. The need for structural BMPs shall be based on the assessment of potential of
sources contributing significant quantities of pollutants to stormwater discharges and data collected through
monitoring of stormwater discharges.
(4) Inspection schedules of stormwater conveyances and controls and measures to be taken to limit or prevent
erosion associated with the stormwater systems.

Permit NC0086169
4
c. Spill Prevention and Response Plan: The Spill Prevention and Response Plan shall incorporate a risk assessment of
potential pollutant sources based on a materials inventory of the facility.Facility personnel(or team)responsible for
implementing the plan shall be identified in the plan. A responsible person shall be on-site at all times during
facility operations that have the potential to contaminate stormwater runoff through spills or exposure of materials
associated with the facility operations.
d. Preventative Maintenance and Good Housekeeping Program: A preventative maintenance program shall be
developed. The program shall document schedules of inspections and maintenance activities of stormwater control
systems,plant equipment and systems. Inspection of material handling areas and regular cleaning schedules of these
areas shall be incorporated into the program.
e. Training schedules shall be developed and training provided at a minimum on an annual basis on proper spill
response and cleanup procedures and preventative maintenance activities for all personnel involved in any of the
facility's operations that have the potential to contaminate stormwater runoff. Facility personnel(or team)
responsible for implementing the training shall be identified in the plan.
f. The Stormwater Pollution Prevention Plan shall identify a specific position(s)responsible for the overall
coordination,development,implementation,and revision to the Plan. Responsibilities for all components of the
Plan shall be documented and position(s)assignments provided.
g. Plan Amendment: The permittee shall amend the Plan whenever there is a change in design,construction,
operation,or maintenance which has a significant effect on the potential for the discharge of pollutants via a point
source to surface waters. The Stormwater Pollution Prevention Plan shall be reviewed and updated on an annual
basis.
The Director may notify the permittee when the Plan does not meet one or more of the minimum requirements of the
permit. Within 30 days of such notice,the permittee shall submit a time schedule to the Director for modifying the
Plan to meet minimum requirements. The permittee shall provide certification in writing(in accordance with Part
III,Standard Conditions,Section B.11.)to the Director that the changes have been made.
h. Facility Inspections: Inspections of the facility and all stormwater systems shall occur at a minimum on a semiannual
schedule,once in the fall(September-November)and once during the spring(April-June). The inspection and any
subsequent maintenance activities performed shall be documented,recording date and time of inspection,individual(s)
making the inspection and a narrative description of the facility's stormwater control systems,plant equipment and
systems. Records of these inspections shall be incorporated into the Stormwater Pollution Prevention Plan.
Visual monitoring as required in Part II,Section A.2.shall be performed in addition to facility inspections.
i. Implementation: Implementation of the Plan shall include documentation of all monitoring,measurements,
inspections,maintenance activities and training provided to employees,including the log of the sampling data.
Activities taken to implement BMPs associated with the industrial activities,including vehicle maintenance
activities,must also be recorded. All required documentation shall be kept on-site for a period of five years and
made available to the Director or his authorized representative immediately upon request.
2. Visual Monitoring
Visual monitoring requires a qualitative visual inspection of each stormwater outfall,regardless of representative outfall
status,for the purpose of evaluating the effectiveness of the Stormwater Pollution Prevention Plan and assessing new sources
of stormwater pollution. No analytical tests are required. Visual monitoring of stormwater outfalls does not need to be
performed during a representative storm event.

Permit NC0086169
•
Monitoring Monitoring
Stormwater Discharge Characteristics Frequency) Type2 Location3
Color Semi-annual Visual SDO
Odor Semi-annual Observation SDO
Clarity Semi-annual Visual SDO
Floating Solids Semi-annual Visual SDO
Suspended Solids Semi-annual Visual SDO
Foam Semi-annual Visual SDO
Oil Sheen Semi-annual Visual SDO
Other obvious indicators of stormwater pollution Semi-annual Visual SDO
1 Frequency:The first visual monitoring event during the term of the permit must be performed during the
initial analytical monitoring event. All subsequent visual monitoring will be performed twice per year, once in
the spring and once in the fall.
2 Monitoring Type:Monitoring requires a qualitative observation of each stormwater outfall. No
analytical testing or sampling is required.
3 Sample Location: Stormwater Discharge Outfall(SDO—effluent at outfalls 001 and 002).
STORMWATER DEFINITIONS
1. Best Management Practices(BMPs)
Schedules of activities,prohibitions of practices,maintenance procedures,and other management practices to
prevent or reduce the pollution of waters of the United States. BMPs also include treatment requirements,operation
procedures,and practices to control plant site runoff,spillage or leaks,sludge or waste disposal,or drainage from
raw material storage.
2. Bulk Storage of Liquid Products
Liquid raw materials,manufactured products,waste materials or by-products with a single above ground storage
container having a capacity of greater than 660 gallons or with multiple above ground storage containers having a
total storage capacity of greater than 1,320 gallons.
3. Point Source Discharge
Any discernible,confined and discrete conveyance,including but specifically not limited to,any pipe,ditch,
channel,tunnel,conduit,well,discrete fissure,container,rolling stock,or concentrated animal feeding operation
from which pollutants are or may be discharged to waters of the state.
4. Runoff Coefficient
The fraction of total rainfall that is not infiltrated into or otherwise retained by the soil,concrete,asphalt or other
surface upon which it falls that will appear at the conveyance as runoff.
5. Secondary Containment
Spill containment for the contents of the single largest tank within the containment structure plus sufficient
freeboard to allow for the 25-year,24-hour storm event.

Permit NC0086169
•
6. Section 313 Water Priority Chemical
A chemical or chemical category which:
a. Is listed in 40 CFR 372.65 pursuant to Section 313 of Title HI of the Superfund Amendments and
Reauthorization Act(SARA)of 1986,also titled the Emergency Planning and Community Right-to-Know
Act of 1986;
b. Is present at or above threshold levels at a facility subject to SARA title III,Section 313 reporting
requirements;and
c. That meet at least one of the following criteria:
(1) Is listed in appendix D of 40 CFR part 122 on either Table II(organic priority pollutants),Table
III(certain metals,cyanides,and phenols)or Table IV(certain toxic pollutants and hazardous
substances);
(2) Is listed as a hazardous substance pursuant to section 311(b)(2)(A)of the CWA at 40 CFR 116.4;
or
(3) Is a pollutant for which EPA has published acute or chronic water quality criteria.
7. Significant Materials
Includes,but is not limited to:raw materials;fuels;materials such as solvents,detergents,and plastic pellets;
finished materials such as metallic products;raw materials used in food processing or production;hazardous
substances designated under section 101(14)of CERCLA;any chemical the facility is required to report pursuant to
section 313 of Title III of SARA;fertilizers;pesticides;and waste products such as ashes,slag and sludge that have
the potential to be released with stormwater discharges.
8. Significant Spills
Includes,but is not limited to:releases of oil or hazardous substances in excess of reportable quantities under section
311 of the Clean Water Act(Ref:40 CFR 110.10 and CFR 117.21)or section 102 of CERCLA(Ref:40 CFR
302.4).
9. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following rainfall or as a result of
snowmelt.
10. Total Flow
The flow corresponding to the time period over which the sample collection occurs. The total flow calculated based
on the size of the area draining to the outfall,the amount of the built-upon(impervious)surfaces within the drainage
area,and the total amount of rainfall occurring during the sampling period.
11. Visible Sedimentation
Solid particulate matter,both mineral and organic,that has been or is being transported by water,air,gravity,or ice
from its site of origin,which can be seen with the unaided eye.
A. (9.) Annual Shutdown Procedures Condition
On an annual basis,the permittee is permitted to discharge up to 250,000 gallons of non-contact cooling water and flush
water,from the two cooling tower basins,through Outfall 002. The semi-annual monitoring associated with outfall 002 shall
coincide with this event. Coming Incorporated shall develop a HVAC Cooling Tower Shutdown Procedure consistent with
BetzDearborn recommendations. The HVAC Cooling Tower Shutdown Procedure should include the condition that both
cooling towers will not be flushed at the same time. This procedure shall be kept on site and available for review by Division
staff upon request. Additionally,the time and duration for the discharge of non-contact cooling water through outfall 002
shall be recorded in the operations log by the Operator in Responsible Charge and available for review by the Division upon
request.

•
Corning Incorporated PO Box i7oo t 704 569 6000 www.corning.com
Optical Fiber Concord, NC 28026-1700
. l
September 14, 2001
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
(as-, U c
a,Q
Mr. Dave Goodrich r L
North Carolina Department of Environment and Natural Resources
Division of Water Quality, NPDES Permit Unit —
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Corning Incorporated, Concord Facility
NPDES Permit No. NC0086169
Duly Authorized Representative
Dear Mr. Goodrich:
CORNING
Discovering Beyond Ima natlo
ttac ed, please find the written authorization provided by Joseph Monastra, Corning,
Inc., Concord Plant Manager for me to sign the facility's DMRs. This authorization has
been on file in the Environmental Control Library since it was signed in October 1999 for
review by DWQ. I want to insure it is part of our DWQ file.
Please feel free to contact me if you have any questions concerning the information
contained in the document. I can be reached at [phone].
Sincerely,
CiLciaLi
Christy Hannan
Environmental Control Engineer
Concord Plant
Corning, Inc.
Enclosures
Cc: Mooresville Regional Office, NCDENR

Corning Incorporated
Telecommunications Products Division
P.O. Box 1700
Concord, North Carolina 280 26-1 700
7oy-569-6000
CORNING
October 20, 1999
FOR INTERNAL USE ONLY
To Whom it May Concern:
As of this date, I hereby designate Christy Hannan, Environmental Control Engineer,
Corning, Inc., as my authorized agent to sign as System Owner/Admin. Officer for North
Carolina Department of Environment and Natural Resources,Designation Form Operator
in Responsible Charge of Water Pollution Control Systems. This will allow Ms. Hannan
to sign Discharge Monthly Reports (DMR's) for the Corning, Inc., Concord Plant.
Sincerely,
Joseph Monastra
Plant Manager
Concord Plant
Corning, Inc.

,Ill
kD\
\(\f\feThe Independent Tribune
NORTH CAROLINA
CABARRUS COUNTY On this, the c S day of O 20 e 1
PUBLIC NOTICE I'
F •STATE OF NORTH
CAROLINA •
ENVIRONMENTAL
MANAGEMENT of The INDEPENDENT TRIBUNE, certifies that the annexed
COMMISSIO
NPOES UNIT/ advertisement was duly inserted in the paper on the
1617 MAIL SERVICE
CENTER following dates:
RALEIGH,NC 27699-1617
NOTIFICATION OF INTENT
TO ISSUE A NPDES `4
WASTEWATER PERMIT \I\ 2 t'1, 07 O C%
On the basis of thorough staff
review and application of NC
General Statute 143.21,
Public law 92-500 and other
lawful standards and
regulations, the North
Carolina Environmental
Management Commission and was published therein for weeks. The
proposes to issue a National
Pollutant Discharge
Elimination System(NPDES) 1 I
wastewater discharge permit
to the person(s) listed below total cost of this advertisement $ 142
effective 45 days from the
publish date of this notice. g--3—MLL---
Written comments regarding Signed
the proposed permit will be
accepted until 30 days atter
the publish date of this notice.
All comments received prior
to that date are considered in
the final determinations
regarding the proposed
permit.The Director of the NC
Division of Water Quality may
decide to hold a public
meeting for the proposed
permit should the Division
receive a significant degree of
public interest.
Copies of the draft permit and
other supporting information
on file used to determine
conditions present in the draft
permit are available upon
request and payment of the
costs of reproduction. Mail
comments and/or requests for
information to the NC Division
of Water Quality at the above
address or call Ms. Christie
Jackson at [phone],
extension 538.Please include
the NPDES permit number
(attached) in any
communication. Interested
persons may also visit the
Division of Wateru Quality at
Ral12eigh.
Nh, NCSalisb 7 Street,
between
27604-1148of8: Irl�r lJ
ICE \
between the hours of 8:00
a.m.and 5:00 p.m.to review
information on file.
NPDES Permit Numbet 1,l
NCO086169, Coming, Inc. - A1 _ 4 TUU
Fiber Optic Plant, P.O- Box ) IV
1700. Concord, NC 28026
has applied for a modification
for a facility located in
Cabarrus County discharging WpSER QUAI�TY
treated wastewater into RCE BRANCH
Rocky River in the Yadkin f�QINT SOU
Pee Dee River Basin.
Currently no parameters are
water quality limited. This
discharge may affect future
allocations in this portion of
the receiving stream.
NO.399.May 24,2001

Corning Incorporated PO Box 1700 t 704 569 6000 www.corning.com
Optical Fiber Concord, NC 28026-1700
June 11, 2001
CERTIFIED MAIL C=
RETURN RECEIPT REQUESTED z
o� z
Mr. Mike Myers, ETT _
North Carolina Department of Environment and Natural Resources .A
Division of Water Quality, NPDES Permit Unit y a
1617 Mail Service Center = Q
Raleigh, North Carolina 27699-1617
RE: Corning Incorporated, Concord Facility
NPDES Permit No. NC0086169
Draft Permit Modification Comments
Dear Mr. Myers:
CORNFN@ur phone conversation, May 23, 2001, we have reviewed the subject draft permit
D1 "" TritId 1 '(tion. The comments I provided over the phone are presented below.
l y to 1)The permit expires October 31, 2003. Biological monitoring is required between June
c,' 1'• and September 2004. These results are to be included in the permit renewal package.
Please revise these dates. (We completed a biological monitoring in 1999.)
2) A pollutant analysis is required once during the permit cycle. We have just completed
0.01:1 , this analysis this spring. We also completed one in 2000. With the permit cycle ending
4 " in 2003, can we be covered by the 2001 analysis until the next permit cycle (> 2003)?
In addition, with the Concord II non-contact cooling water system coming on line, we
need to increase the volume of non-contact cooling water we need to discharge to Outfall
002 during annual shutdown as described in Section A.(9) of the draft permit. Annual
,r JJ maintenance will require the flushing of two cooling tower basins instead of the original
v ,'�' ,1..- one. This will increase the volume of water to 250,000 gallons. The basins will not be
a1flushed at the same time and the procedures described in Section A.(9) will be followed
G• x+10 for both basins. — 5.e. 4(.5) ,J.-fol
5' v
\°
pp. Please feel free to contact me if you have any questions concerning the information
above. I can be reached at [phone].
Se
Cincerelly,
io-
hristy Hannan
Environmental Control Engineer
Concord Plant, Corning, Inc.

•
DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
• NPDES No. NC0086169
Facility Information
ApplicantlFacility Name: Corning,Incorporated—Midland Facility
Applicant Address: P.O. Box 1700, Concord, NC 28026-1700
Facility Address: 14556 Highway 601 South
Permitted Flow 0.107 MGD currently requesting 0.142 MGD
Type of Waste: 100%Industrial
Facility/Permit Status: Active requesting major modification
County:-' Cabarrus
Miscellaneous
Receiving Stream: UT Muddy Creek Regional Office: Mooresville
(001), UT Clear
Creek(002),
Rocky River
(003)
Stream Classification: C USGS Topo Quad: G 16NE/G 17N W
303(d)Listed?: No Permit Writer: Michael Myers
Subbasm: 03-07-12 Date: May 16, 2001
Drainage Area(mi2): NA
Summer 7Q10(cfs) 30 i uA
Winter 7Q10(cls): NA ,.
Average Flow(ets): NA 4,, ,-
IWC(%) 1.8 (at 0.142
MGD)
Primary SIC Code: 3229
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
Coming Incorporated manufactures optical fibers at its Midland facility in Cabarrus County. The facility
originally received its National Pollutant Discharge Elimination System(NPDES)permit in 1998.
Startup began late that year. The facility was issued a renewed NPDES permit on April 14,2001,which
included an expanded flow to 0.107 MGD. On December 19,2000,the Division of Water Quality
received a request for modification to the NPDES Permit, specifically,the facility requested a flow
expansion from 0.107 MGD to 0.142 MGD.
Wastewater generated includes sanitary wastewater, non-contact cooling wastewater, process wastewater,
stormwater, filter backwash water and boiler blowdown. Currently, sanitary wastewater is treated off-site
at the Muddy Creek Wastewater Treatment Plant. Wastewaters other than sanitary are treated and
discharge through one of three outfalls as summarized below.
Outfall 001
This discharge is comprised of 100%stormwater, collected in a stormwater detention pond. The
receiving stream is an unnamed tributary of Muddy Creek. Currently,no effluent limitations and
monitoring page is contained within the permit for this outfall,though stormwater controls are required.
Special Condition A. (6.)of the permit addresses stormwater discharges and applicable monitoring
requirements. This proposed modification would have no effect on the requirements for this outfall.
Outfall 002
This discharge is comprised of stormwater and humidification boiler blowdown. Wastewater is collected
in a stormwater detention pond prior to discharge into an unnamed tributary of Clear Creek. Effluent
limitations and monitoring have been applied and stormwater controls are required(Special condition A.
(6.)of the permit addresses stormwater discharges and applicable monitoring requirements). The
proposed modification will have no effect on the permit for this discharge.
Corning Fact Sheet
NPDES Renewal
Page 1

•
Outfall 003
This discharge is comprised of industrial process wastewater,non-contact cooling water,and carbon filter
backwash water. These wastewaters are neutralized and treated using a solids removal unit prior
discharge into the Rocky River. This proposal will increase industrial process and carbon filter backwash
wastewater flow to 0.142 MGD and total flow to 0.334 MGD(per application).
Note, from the above discussion,non-contact cooling water enters outfall 003 effluent line after the
treatment facility. Under this proposal,approximately 192,000 gallons per day(gpd)of non-contact
cooling water will be commingled with the process wastewater prior to discharge. The 0.142 MGD flow
limit shall apply to the process wastewater and instream waste concentration used to determine the
toxicity limit is based on the total flow(process+non-contact cooling water)discharged.
The flow limit of 0.142 MGD, includes sum of the industrial process wastewater and the carbon filter
backwash wastewater therefore,the compliance point for flow is upstream of the point at which non-
contact cooling water is introduced. Though the flow limit includes only industrial process wastewater
and carbon filter backwash wastewater,the toxicity testing limit has been established using an IWC
calculation using the entire anticipated flow from outfall 003 (about 334,000 gpd).
According to the priority pollutant analysis,the effluent discharged by the facility may contain
chloroform,aluminum,arsenic,cadmium,chromium,copper,nickel,selenium,zinc,chloride and
fluoride. The primary parameters of concern from outfall 003 (as indicated in Table 1)are chloride,
cadmium, copper and zinc. These parameters are discussed below.
Based on the Division's analysis this discharge does not pose a reasonable potential to cause an
exceedence of the North Carolina's Chronic Aquatic Life Action Level Standard for chloride. However,
the maximum predicted concentration using self-monitoring data is greater than the Criteria Maximum
Concentration(CMC). A numerical limit is not included since chloride is an action level water quality
standard and biomonitoring requirements are adequate to control toxicity due to chloride.
Based on the Division's analysis this discharge does not pose a reasonable potential to cause an
exceedence of the North Carolina's Chronic Aquatic Life Standard for cadmium. However,the
maximum predicted concentration using the reported value in the annual pollutant analysis monitoring
report is greater than the CMC. This analysis is based on one data point and an assumed coefficient of
variation of 0.6. Though no limit is proposed a monitoring requirement has been added in order to gather
sufficient data to evaluate this discharge.
Based on the Division's analysis this discharge does not pose a reasonable potential to cause an
exceedence of the North Carolina's Chronic Aquatic Life Action Level Standard for copper.However,
the maximum predicted concentration and the result in the annual pollutant analysis monitoring report are
greater than the CMC. Numerical limits for copper are not being included since copper is an action level
water quality standard and the biomonitoring requirements are adequate to control toxicity due to the
presence of copper in the facility effluent.The permittee may request that the Division reevaluate the
monitoring requirement after seven data points have been collected over seven months.
Based on the Division's analysis this discharge does pose a reasonable potential to cause an exceedence
of the North Carolina's Chronic Aquatic Life Action Level Standard for zinc.Numerical limits for zinc
are not being included since zinc is an action level water quality standard and the biomonitoring
requirements are adequate to control toxicity due to the presence of zinc in the facility effluent. Though
no limit is proposed, if the facility experiences chronic toxicity violations the discharge will be re-
evaluated according to the Division's Action Level Policy. The permittee may request that the Division
reevaluate the monitoring requirement after seven data points have been collected over seven months.
Coming Fact Sheet
NPDES Renewal
Page 2

. t
• Table 1. Identified Pollutants of Concern with Maximum Predicted Concentrations.
• Aquatic Life
Chronic Aquatic Life Half Final Annual Pollutant Maximum Predicted
Allowable Acute Analysis Monitoring Effluent
Parameter Concentration' Concentration Result Concentration
Aluminum 5128µg/L2 750µg/L 360µg/L 4752 µg/L3
Arsenic 2947µg/L 340µg/L 25 µg/L 330µg/L3
Cadmium 117.9µg/L 15 µg/L 3.0µg/L 39.6µg/L3
Chromium 2947.4µg/L 1022µg/L 13 µg/L 171.6µg/L3
Copper 412.6µg/L 7.3 µg/L 13 µg/L 171.6µg/L3
Nickel 1473.71.4/L 261 µg/L 11 µg/L 145.2µg/L3
Selenium 294.7µg/L N/A 5.0µg/L 66µg/L3
Zinc 2947.4µg/L 67µg/L 864µg/L 11404µg/L3
Chloride 14737.2 mg/L 860 mg/L 9,500 mg/L 14442.2 mg/L4
Fluoride 106.1 mg/L N/A 2.09 mg/L 27.6 mg/L3
` based on North Carolma Chronic Aquatic Life standard.
2 based on Environmental Protection Agency(EPA)Chronic Aquatic Life Criterion.
3 based on an assumed Coefficient of Variation(CV)of 0.6,per Technical Support Document.
4 based on Reasonable Potential Analysis using the Technical Support Document methodology.
TOXICITY TESTING:_
Current Requirement: Chronic P/F @ 1.0%at 0.107 MGD using Ceriodaphnia
Proposed Requirement: Chronic P/F @ 1.7%at 0.142 MGD using Ceriodaphnia
The above IWCs were calculated using a flow equal to the sum of the permitted flow at outfall 003 and the non-
contact cooling water contribution.
This facility has passed all toxicity tests since startup.
COMPLIANCE SUMMARY:
The facility has been in compliance with its NPDES Permit.
INSTREAM MONITORING:
A benthic macroinvertebrate study was required in the original permit. That permit required the facility to complete
a benthic survey during the summer of 1999. The study was completed in August and submitted to the Division for
review. Dave Lenat of the Environmental Sciences Branch reviewed the study and provided the writer with
comments. His conclusion were in agreement with the study results,which indicated no biological impact from this
discharge. As the discharge will be expanding,the benthic survey requirement will be included with this renewal.
Expansion is not expected to be complete until late 2003. As such,the draft permit will require a benthic study be
completed during the summer of 2004. No other instream monitoring is required.
PROPOSED CHANGES:
Outfall 003 Flow Limit: The flow limit at outfall 003 has been modified in accordance with the facility's request.
IWC for Outfall 003: The IWC has been updated to reflect the increase in permitted flow at outfall 003. See the
Toxicity Testing portion of this report.
Cadmium monitoring for outfall 003,see discussion above.
Copper monitoring for outfall 003,see discussion above.
Zinc monitoring for outfall 003,see discussion above.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: May 16,2001
Permit Scheduled to Issue: July 9,2001
Corning Fact Sheet
NPDES Renewal
Page 3

.
STATE CONTACT:
• If you have any questions on any of the above information or on the attached permit,please contact Michael Myers
at(919)733-5038 ext.508.
NAME: ff‘dez,
l� DATE: /fly ly /44; ,94s1/49NPDES SUPERVISOR: (/
NAME: DATE:
Corning Fact Sheet
NPDES Renewal
Page 4

•
REGIONAL OFFICE COMMENT:
$1. Park w :// S Ay01i Cd.,1 </
i #taade 4 d
sA..1/ /
NAME: DATE:
REGIONAL SUPERVISOR:
NAME: DATE:
Coming Fact Sheet
NPDES Renewal
Page 5

•
Whole Effluent Toxicity Testing Self-Monitoring Summary April 19,2001
FACILITY REQUIREMENT YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Cama Scope Inc/003 24br LCSO se monis epu Bid(composite tempting) 1997 - - - - - - - - H - H -
NC0034754A03 Begm10/8/1997 Frequency:l/calQ t/cakudsrQ NonComp: 1908 H H H - H H - - H H - <e a
County:Catawba Reim:MRO Subbasin:CTB32 1999 - - H - - H - - H - - Br
PF:<sr SpxiN 2000 - - NR - - NR - - H - - H
7QI0:0.0 IWC(%)aa Order: 2001 - -
Coasn Scope lanJ004 24 it LC50 se monit epic Bid(composite sampling) 1997 - - - - - - - - H - H 28.9
NC0034754/004 Begin:10/8/1997 Frequency:1/a1Q 1/alendarQ NonCenp: 1990 - H H - H H - - H H H 30.9
County:Catawba Region:MRO Subbnin:CTB32 1989 - - H - - H - - H - - Bt
PF:var Special 2080 - - pct - - NR - - H - - H
7Q10:0.0 IWC(%)m Order 2001 - -
Coonaadcatioss lastrameats lie Penn chr lin:5.6%(Grab) 1007 - N N - et et Bt Wet Peas - Pass -
NC0033227/004 Begia7/1/1996 Frequency:QPIF + Feb May Aug Nov + NonComp:Single 1908 - Per - - Par - - Pass - - Pens -
County:Buncombe Region:ARO Subbrin:FRB02 1000 - Pon - - NR Par - Pens - - Pass -
PF:0.288 Special 2000 - Pass - - Fail >22 >22 Pass - - Pan -
7Q10:7.5 lWC(%):5.6 Order 2001 - Pass
Concord Rocky River W WTP Penn P-2 civ lint:69%,once Q>20 MOD,then 73%bait(New Y 1907 - >99 - - >99 - - >99 - - 48.8 >90
NC0036269/001 Begin:7/1/1995 Frequency:Q Feb May Aug Nov + NonComp:ChV Avg 1998 NR a09 - - >99 - - >99 - - >99 -
County:Cabana Region:MRO Subbasin:YADI2 1999 - >90 - - >99 - - >99 - - 49 -
PF:20 Special 2000 - >89 - - 78.8 - - >99 - - >99 -
7Q10:14.0 IWC(%):69 Order: 2001 - >99
Cone Mills-Clf stele Penn chr lin:4.2% 1997 Fat Pan - Pass - - Pass - - Pass - -
NC0004405/001 Begin:2/1/1999 Frequency:Q P/F + Jan AprJuI Oct + NonComp:Single 1998 Peas - - Pass - - Fail Pass - Pass - -
County:Rutherford Region:ARO Subbedm BRD02 1990 Pass - - Pees - - Pass - - Pau - -
PF: 1.75 Special 2000 Fell Fall Pass Pan - - Pass - - Pus -- -
1Q10:62.10 IWC(%):4.19 Order. 2001 FW 2.5,>10
Cone Mils Greensboro-001 Penn cli 1n:79% 9 1997 48.14 >79 48 14 28 14 48 28 28 28 28 Late
NC0000876/001 Begin:5/1/1998 Frequency:Q P/F + Mar Jon Sep Dec + NanComp:Single 1990 lar 482 882 68.3 28.1 88.3 28 28.1 14.1 482 28.1 >79
County.Guilford Region:WSRO Subbasin:CPF02 1900 >79 <10 28 682 28 4a 48 e8 ea <10 28 14
PF: 1.25 Special 2000 28.1 28 Late 28.1 14.1 88.3 14.1 <10 14.1 48.3(s) 28.1(a) 28.1
7Q10:0.5 IWC(%):79 Order. 2001 48.3 3388(s)
Conover NE W WTP Penn chr len:32%(New perm 1/1/2001) 9 1007 - - Pass - - Pas - - Pas - - Pees
NC0024252/001 Begin:6/1/1996 Frequency:Q P/F + Mar Jun Sep Dec + NonCanp:Sing a 1996 - - Pass - - Pas - - Pass - - Pass
County:Catawba Region:MRO Subbasin:CTB32 1089 - - Pass - - Pass - - Late Pass - Pen
PF: 1.5 Special 2000 - - Pass - - Pap - - Pap - - Pass
7Q10:5.0 IWC(%)•.32.0 Order 2001 - -
Caitestia MSD PERM CHR LIM 11%(New perm 2/1/2001) 9 1997 Pass - - Pass - - Pass - - Pap - -
NC0032077/001 Begin:5/1/1994 Frequency:QP/F + Jan Apr Jul Oct NonCanp:SINGLE 1998 Lars Late Pees Pas - - Pas - - Pens - -
County:Pitt Region:WARO Snbbsdo:NEU07 1900 Pares - - Pass - - Pass - - Par - -
PF:2.85 Special 2000 pan - - Pass - - Pass - - Lars Pass -
1Q10:36.0 IWC(%):il Older: 2001 Pass -
Csskemr W WTP PERM CHR LIM:2.1% V 1997 Pass - - Pass - - Pau - - Pas - -
NC0024872/001 Begin:9/1/1994 Frequency:Q P/F + Jos Apr Jul Oct NosComp:SINGLE 1998 NRIPess - - Pass - - Pass - - Pap - -
County:Davie Region:WSRO Subbasin YADO6 1909 Pew - - Pass - - Pas - - Pass - -
PF: 1.5 Special 2000 Pass - - Pass - - Pees - - Pass - -
7Q10:106 IWC(%):2.I Order 2001 Pass -
Caning Iac.-Mldlesd Fiber Facility Perm dim lie:1.0% 1007 - - - - - - - - - - - -
NC0086169/003 Begin:5/I/2000 Frequency:Q Jan Apr Jul Oct + NonCanp:Single 1998 - - - N - - N - - N - -
County:Cabana Region:MRO Subbasin:YADI2 1900 Pies - - Pus - - NR/Pass - - Pass - -
PF:0.107 Special 2000 pa. - - Pass - - Pass - - Pas - -
7Q10:30 1WC(%):1.0 Order 2001 Pass - Piss
Cerra,Dept Of(Caledonia) Penn 24hr p/f ac lint:90%Rid 1907 Pus - - Pass - - Pass - - Pose - -
NC0027626/001 Begin:10/1/1997 Frequency:Q + Jan Apr Jul Oct + NonComp:Single 1998 Pass - - Pass - - Pass - - Piss - -
County:Halifax Region:RRO Subbasin:ROA08 1900 Pais - - Pass - - Pass - - et - -
PF:0.8 Special 2000 & - - Pass - - Pen - - Pest - -
7Q10:1000 IWC(%)0.12 Order 2001 Pass -
9 Pre 1997 Data Available
LEGEND:
PERM-Permit Requirement LET-Administrative Letter-Target Frequency•Monitoring frequency:Q-Quarterly;M-Monthly;BM-Bimonthly;SA-Saniannualy;A-Annually;OWD-Only when discharging D-Discontinued monitoring roquirement
Begin-Fun month required 7Q10•Receiving stream low flow criterion(cin) +•quarterly monitoring increases to'ninthly upon failure or NR Months that testing must occur-ea.Jan,Apr,Jul,Oct NonComp-Current Compliance Requirement
PF-Permitted flow(MGD) IWC%-Instresm waste concentration P/F•Pars/Fail lest AC•Acute CHR•Chronic
Data Notation:f-Fathead Minnow;•-Caiodaphnia sp.;my-Mysid shrimp;CNV-Chronic value;P-Mortality of staled percentage at highest concentration;at-Performed by DWQ Aquatic Too Unit;int-Bad ten
Reporting Notation:-•Data not required;NR-Not reported Facility Activity Status:I-Inactive,N-Newly Issued(To construct);H-Active but not discharging f-More data available for month in question;• =ORC signature needed
13

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Facility Name = Corning Inc. -Midland Parameter = Chloride
NPDES# = NC0086169 Standard= 250.0 mg/L
Qw(MGD) = 0.334
7Q10s(cfs)= 30 Date n < BDL=1/2DL Actual Data
IWC(%) = 1.70 1 10529.0 10529
2 9236.3 9236.25
FINAL RESULTS 3 8595.4 8595.38
Chloride 4 8614.0 8614
Max. Pred Cw 14442.24759 5 8614.0 8614
Allowable Cw 14737.2 6 9007.0 9007
Allowable#/day 41051.23 7 9375.0 9375
8 7733.0 7733
RESULTS 9 5770.0 5770
Std Dev. 1553.299626 10 5394.0 5394
Mean 8259 11 5638.0 5638
C.V. 0.188077169 12 7472.5 7472.5
13 9352.5 9352.5
Number 14 9460.0 9460
of data points 15 15 9092.0 9092
Mult Factor = 1.37
Max. Value 10529.0 mg/L
Max. Pred Cw 14442.25 mg/L
Allowable Cw 14737.2 mg/L
Allowable#/day 41051.23#/day

Facility Name = Corning Inc. -Midland Parameter = Iron
NPDES#= NC0086169 Standard = 1000.0 µg/1 I
Qw(MGD) = 0.334
7Q10s (cfs)= 30 Date n < BDL=1/2DL Actual Data
IWC(%) = 1.70 1 1.3 1.333
2 1.1 1.08
FINAL RESULTS 3 1.0 1
Iron 4 1.0 0.98
Max.Pred Cw 2.154166935 5 1.2 1.175
Allowable Cw 58948.6 6 1.0 1
7 0.7 0.704
8 1.0 1.034
RESULTS 9 0.8 0.77
Std Dev. 0.229809175 10 0.7 0.74
Mean 1.0 11 0.8 0.75
C.V. 0.22834775 12 1.5 1.47
13 0.8 0.77
Number 14 1.2 1.19
of data points 15 15 1.1 1.1
Mult Factor = 1.47
Max.Value 1.5 µg/I
Max.Pred Cw 2.154166935 µg/I
Allowable Cw 58948.6 µg/1 .

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✓''1ryw, Corning Incorporated G
1*,411
' Telecommunications Products Division z/5--,669P.O.Box 1700
Concord,North Carolina 28026-1700
December 1%4 26 6000 . ,(jf Yg,S
Mr. David A. Goodrich
North Carolina Department of Environment and Natural Resources
Division of Water Quality,NPDES Unit CORNING
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
RE: NPDES Permit Modification Request for Coming's Midland Facility;
NPDES Permit No. NC0086169—Coming,Incorporated;
Cabarrus County
Dear Mr. Goodrich:
Coming,Incorporated is planning a second expansion of its fiber optic manufacturing facility in
Cabarrus County. To accommodate this expansion,Coming is hereby requesting modification to its
NPDES permit,issued on December 4, 2000. Specifically,Coming requests an increase in the
permitted flow for its process wastewater outfall,designated outfall 003,from 0.107 MGD to 0.142
MGD. Furthermore,as the increased production associated with this expansion is not expected to
be realized until 2002,Coming requests that effluent limitations associated with a 0.142 MGD flow
tier not be implemented until July 1, 2002. Details of the proposed expansion are summarized in the
attached permit application documents.
We are operating under strict time constraints with respect to this expansion. We appreciate the
hard work of your staff and respectfully request receipt of the requested permit modification by June
2001. Additionally,we will be submitting our request for Authorization to Construct(ATC)by the
end of January 2001 and request that the ATC be issued concurrently with the permit modification if
at all possible. (s;,.,., bJ
We look forward to meeting with you in January to discuss this and other issues. Thank you for your
consideration of our request. If you should have any questions during your review or need additional
information,please don't hesitate to contact me at(704)569-6268.
Sincerely,
Christy L.Hannan
Environmental Control Engineer DEC 1 9
Coming,Inc.
P
POINTATER QUALITY
SOURCE URCE BRANCH
Enclosures
cc: Blake Manuel,Coming,Inc.,Corporate Environmental Group

Corning, Incorporated
0 Midland Waveguide Facility
Cabarrus County, North Carolina
SUMMARY
Corning,Incorporated manufactures optical fiber at its Cabarrus County facility in Midland,North
Carolina. The facility operates the following NPDES permitted outfalls:
• Outfall 001: Stormwater discharge from detention pond to an unnamed tributary to
Muddy Creek.
• Outfall 002: Discharge of stormwater and humidification boiler blowdown from South
Stormwater Management Pond to an unnamed tributary to Clear Creek.
• Outfall 003: Discharge of process wastewater and other non-process wastewater such as
non-contact cooling water to the Rocky River. Process wastewater is
generated from wet scrubbers used for air pollution abatement.
Outfalls 002 and 003 have analytical monitoring requirements while outfalls 001 and 002 are
regulated by the stormwater portion of permit number NC0086169.
OOriginally permitted in 1997,Corning requested a permit modification with its renewal in April of
1999 for an increase of flow to accommodate a manufacturing expansion,dubbed Concord II. This
expansion increased the permitted flow for outfall 003 from 0.0274 MGD to 0.107 MGD. The
current expansion request, dubbed Concord III,will increase the permitted flow for 003 from 0.107
MGD to 0.142 MGD. It should be noted that although non-contact cooling water and process
wastewater are commingled prior to discharge,the compliance point for flow at outfall 003 is, and
should continue to be,upstream of the confluence of these two streams and is meant to measure
only the process wastewater contribution. The chronic toxicity test percentage is based on the
commingled flow, approximately 0.33 MGD after expansion.
WASTEWATER TREATMENT (See Figures 1—3 as well as Attachment A)
In general terms,the Pollution Abatement Neutralization System collects all potentially
contaminated wastewater streams from the plan and provides unit operations for treating those
streams to the parameters provided in the NPDES permit so they can be discharged to the Rocky
River. The Neutralization System consists of two separate,yet interconnected,operations;
Neutralization System No. 1 and Neutralization System No. 2.
Neutralization System No. 1 (also referred to as the"existing"system or"NEUT 1")will continue
current operations with the following exceptions:
O

1. Non-contact cooling water blowdown from the Concord I utility area will be piped to
• Neutralization System No. 2 for treatment prior to discharge;
2. The treated effluent from the Neutralization Transfer Tank will be Piped to
Neutralization System No. 2 for suspended solids removal; and
3. All softener regeneration wastewater will be treated in Neutralization System No. 2.
The existing cooling tower filters will be taken out of service and the filter backwash will no longer
flow to Off-Spec Tank No.1.
Neutralization System No. 2 collects wastewater from the Concord II Phase 1 and Phase 2
scrubbers and any contaminated stormwater from the secondary containments,equalizes hydraulic
surges and chemical concentrations,removes suspended solids from the wastewater,neutralizes
wastewater to required levels,re-treats any off-spec wastewater,and discharges the treated
wastewater to the river. Treated effluent from Neutralization System No. 1 is pumped to the
Surge/Blend Tank in Neutralization System No. 2. Non-contact cooling water and softener
regeneration wastewater from the existing plant and expansion utility areas are piped to the
Surge/Blend Tank in Neutralization System No. 2 to be treated prior to discharge.
Neutralization System No.2 is included as part of the Concord plant expansion project. This
system consists of three distinct unit operations.
• Acid Cleaning Unit
The first operation consists of a system to collect and remove suspended solids from
Concord II and III HC1 scrubber blowdown. In normal operation,the blowdown from
Concord II and III HC1 scrubbers is pumped in batch mode(8—20%HC1)to Lamella No.
2 Head Tank. This tanks serves to equalize flow surges and allows a constant feed to
Lamella Separator No. 2. In this lamella a flocculant is added and any suspended solids
present in the scrubber blowdown are removed. Treated effluent from this lamella is
pumped to the Chloride Stabilization Tank and is then pumped at a constant flow rate to
Equalization Tank No. 2. Solids are intermittently removed from the lamella and
transferred to Sludge Thickening Tank No. 2.
Figure 1—Acid Cleaning Unit
Sludge to Thickening
Lamella head Lamella Separator Tank No.2
Tank;3,000 - III' No.2
gallons
A
Flocculant
Chloride Transfer Tank
Stabilization Tank 4 400 gallons
• 60,000 gallons