ML20086M964

Forwards NPDES Supplemental Info Update to NPDES Permit Application,Proposed Rewrite of NPDES Permit & Supplemental Info,Description of Requested Permit Changes & Marked Up of Existing Permit Showing Changes

ML20086M964
Person / Time
Site:	Catawba
Issue date:	07/19/1995
From:	Carter J DUKE POWER CO.
To:	Eleazer T SOUTH CAROLINA, STATE OF
References
NUDOCS 9507250066
Download: ML20086M964 (86)

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, . il l Dukelhmer Company Elerbsc.%Iem Suppnt ikpirtmrnt im?llagers FHn Rmid II:mn iu rile, NClM379.'9 i DUKE POWER July 19,.1995 Mr. Timothy M. Eleazer Industrial and Agricultural Wastewater Division South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, SC 29201

Subject:

Catawba Nuclear Station -NPDES Permit No. SC0004278 Application and Permit Update File: CN-702.13

Dear Mr. Eleazer:

As you discussed recently with Mr. John Estridge, Duke Power is updating the Catawba Nuclear Station's NPDES permit application prior to the permit being reissued later this year, due to the State's watershed management strategy. This will allow for several items to be updated in the permit and application. In addition to updating these two documents, we wish to see the two adjudication issues resolved as well as the 316(a) demonstration ' receive final approval.

The following has been attached to this letter for your review and comment:

1. NPDES SupplementalInformation Update to Application

2. Proposed rewrite of NPDES permit and supplemental information

3. Description of requestedPermit changes

4. Marked up copy of eristing permit showing changes Representatives of Duke Power are available to meet and discuss these changes if necessary.

Should you have any questions concerning this letter please give John Estridge a call at (704) 875-5965.

Sincerely,

) ~ .

ohn S Carter, Technical System Manager

[ Environmental Division, Water Protection 9507250066 950719 PDR ADOCK 05000413 .

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CATAWBA NUCLEAR STATION NPDESLPERMIT #SC0004278 SUPPLEMENTAL INFORMATION l

" 07/19/95 .

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1. General Station Description i

2. Station Intakes  ;

2.1. RL Intake Structure .

f.2. Id Intake Structure i

3. Outfal1001 -

f 3.1. Inputs  :

3.1.1. Low Pressure Service Water j i

3.1.2. Liquid Radioactive Waste (WL)- Outfall 004 l 3.1.3. Cooling Tower Blowdown (RC) - Internal Outfall 005 i.

I-3.1.4. Nuclear Service Water (RN) -l 3.2. Flows f 3.3. Chemical & Characteristics ,

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4. Outfall 002 >

l 4.1. Description of Discharge 4.1.1. Sen' ice Building Sump i i

4.1.2. WaterTreatment Room 4.1.3. Diesel Generator Room Sumps ,

4.1.4. Turbine Building Sumps 4.1.5. Wet Lay-Up 4.1.6. Auxiliary Building Floor Drain Sumps  !

4.1.7. Turbine Building Floor Drains i 4.1.8. Diesel Generator Catchment Sumps  ;

I Catawba Nuclear Station NPDES Permit SC0004278 Tabic of Contents Revised 7/18/95 Page1 a-..

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4.1.9. Step-up Transformers Base Drainage Sumps j ..

[ 4.1.10. Sulfuric Acid Tank Containment Drainage Sump 4.1.11. Secondary Containment Sumps 4.1.12. Miscellaneous 4.2. Flows 4.3. Chemical & Characteristics l 4.4. Treatment

5. Outfall 003 5.1. Description of Discharge 5.2. Flows 5.3. Chemical & Characteristics -

5.4. Treatment

6. Outfal1004  :

6.1. Description of Discharge 6.2. Flows 6.3. Chemicals & Characteristics 6.4. Treatment I

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7. Outfall 005 7.1. Description of Discharge 7.2. Flows 7.3. Chemicals & Characteristics s

7.4. Treatment Catawba Nuclear Station NPDES Permit SC0004278 Table of Contents llevised 7/1895 Page 2

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8. Miscellaneous Operations ,

8.1. Fire System 8.2. Drinking Water System 4

. 8.3. Cooling Tower Drainage

.8.4. Miscellaneous System and Component Cleanings  ;

8.5. Stormwater Discharges

9. Other Environmental Permits 9.1. Landfill 9.2. Stormwater NPDES 9.3. Air Permit 9.4. RCRA Part A l

L 9.5. Underground Storage Tank Permits 4

9.6. Asbestos

10. 311 Exemption I 1. 316(a) Exemption

12. Site Layout and Drawings

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Catawba Nuclear Station NPDES Permit SC0004278 Table of Contents Revised 7/18/95 Page 3 1 l

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1.0 GENERAL STATION DESCRIPTION The Catawba Nuclear Station is a two unit nuclear fission steam electric generating station. It is owned by Duke Po,wer Company, North Carolina Electric Membership Corporation, North Carolina Municipal Power Agency Number #1, Piedmont Municipal Power Agency, and the Saluda River Electric Cooperative, Inc. The facility is operated by Duke Power Company.

Each unit is a four loop pressurized water reactor. Reactor fuel is zircaloy clad i

sintered uranium oxide pellets. Reactor heat from each unit is absorbed by the reactor coolant system and produces steam in four steam generators sufficient to drive a turbine generator unit with a design net electrical rating of 1129 1 megawatts.

The nuclear reaction is controlled by control rods and chemical neutron absorption. Boric acid is used as a chemical neutron absorber and to provide borated water for safety injection. During reactor operation, changes are made in the reactor coolant boron concentration.

A schematic diagram of water use and discharges indicating average rates of flow for individual waste streams of Catawba Nuclear Station is attached. Actual flows through individual systems may vary significantly depending on need to operate and meteorological conditions. The following is a brief description of the major discharges for the station.

The station has 5 permitted outfalls, three of which discharge directly litto Lake Wylie. Outfall 001 discharges once through cooling water from the Low Pressure Service water system. Outfall 002 discharges the Conventional Wastewater Treatment system which consists of station sumps and blowdown from various plant systems, Outfall 003 discharges sanitary wastewater from the various buildings on site. Outfall 004 is an internal outfall discharging low level radioactive effluents through outfall 001. Outfall 005 is also an intemal outfall discharging cooling tower blowdown through outfall 001.

2.0 Station Intakes There are two intake .nructures to withdraw raw water from Lake Wylie. One for the Low Pressure Service Water System and one for the Nuclear Service Water System. The locations of the intake points and discharge location is shown on Attachment #1.

Lake water enters each intake structure through trash racks. The trash racks remove large debris and then through traveling screens, which remove smaller debris. l' Catawba Nuclear Station NPDES Permit sC0004278 supplemental Information Revised 7/IM/95 Page 4

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2.1 Low Pressure Service Water Intake Structure There are a total of six pumps on the Low Pressure Service Water intake structure. Three are for the Low Pressure Service Water System and three are for the Fire Protection System. Each Low Pressure Service Water pump is in a separate bay equipped with a trash rack and traveling icreen.

. The three fire protection system pumps share a single bay. The trash racks and traveling screens remove trash and prevent debris from entering the pumps.

Accumulated trash is cleaned from the racks by hand and from the screens by a backwash system. The intake screens are backwashed manually, automatically, or as frequently as the differential level alarms on each pump bay indicate the need. Design flow is 560 gpm. Each screen is backwashed every eight hours for 45 minutes per screen. The water is returned to Lake Wylie at the intake bay. The trash and debris collected from the racks and screens are disposed in a permitted landfill. No chemicals are used in the backwash operation.

The three low pressure service water pumps are separated by precast concrete wall panels that form pump wells. Each pump withdraws water from its well and discharges to a common header. After leaving the common header, flow is divided into two main headers, A and B. Both headers are in service during normal operations, however a single header can provide sufficient flow to meet system demands with both, units in operation.

Upon entering both headers A and B, flow passes through a strainer designed to remove still finer debris from the lake water. These strainers backwash automatically based upon either a sdi time interval or increase in differential pressure. This backwash water passes through a strainer basket which catches the refuse and allows the water to drain back to the lake.

2.2 Nuclear Service Water System Intake Structure The Nuclear Service Water System is a once-through non-contact plant cooling water system. This system supplies cooling water to various heat loads in the Auxiliary and Reactor Buildings other than the secondary (steam) side of the station. It is served by two bodies of water - Lake Wylic and the Standby Nuclear Service Water Pond - but only one pump structure. The intake structure in each water body is completely ,

submerged approximately 30 feet below the surface of the water. Normal  :

Catawba Nuclear Station NPDES Permit SC0004278 supplemental Information Revised 7/lS/95 Page5

alignment is from Lake Wylie with the Standby Nuclear Service Water Pond as an assured back-up in case oflow level in the pump structure.

The Standby Nuclear Service W9 ter Pond (SNSWP) and the pump structure are seismically designed with sufficient water to bring the station to a cold shutdown in case of the loss of Lake Wylie Dam. The level of

.. the pond is maintained via an overflow pipe to the lake and pumping capability from the lake. Water from either the pond or the lake is piped to the nuclear service water pump structure. The pump structure consists of two 330,000 gallon pits that serve to provide suction to the pumps. There are two pumps per pit for a total of four pumps inside the intake structure.

In normal Nuclear Service Water System operation, pump suction is from Lake Wylie. Pump suction can be switched to the Standby Nuclear Service Water Pond.

Additionally, during testing required by the Nuclear Regulatory Commission, in order to verify flow balance, and certain times during plant operation the Nuclear Service Water system is aligned to discharge to the Standby Nuclear Service Water Pond rather than outfall 001. When discharge is aligned in this manner, the pump suction can be either from the lake or the pond.

In order to maintain the temperature of the SNSWP within limits imposed by the Nuclear Regulatory Commission cooler water from Lake.Wylie is periodically pumped to the pond. This is dependent on current' weather conditions and the amount of time in such alignment will vary.

The typical temperature change of the water removed from and returned to the Standby Nuclear Service Water Pond is 2 0F. The temperature change is greater if alignment to the pond occurs during the process of shutdown. This aligmnent may also be required periodically during times when a diesel generator is inoperable. The discharge line to the pond splits and discharges flow to separate points of the pond to assure that cooling will be uniform across the surface.

Periodically to ensure operability, the nuclear service water pump bearings are cleaned to remove silt and sediment deposits which restrict pump cooling water flow. Approximately fifty gallons of cleaning solution are injected into the bearing cooling water flow path for each pump. A soda ash (Na2CO3 ) solution is used for rinsing the pump bearings. The cleaning solutions are captured in drums and are used as treatment chemicals in the conventional treatment ponds. This cleaning is Catawba Nuclear Station NPDES Permit SC0004278 Supplemental information Revised 7/18/95 Page 6

not considered a chemical metal cleaning and does not attack the base metal of the piping.

3.0 Outfall 001  :

3.1 Inputs Outfall 001 discharges subsurface through a concrete structure directly into the Big Allison Creek arm of Lake Wylie and is comprised of the:

Low Pressure Service Water System (RL)

Liquid Radioactive Waste (WL) Outfall 004 Cooling Tower Blowdown (RC) Outfall 005 Nuclear Service Water System (RN).

A detailed description of each input follows.

3.1.1 Low Pressure Service Water The Low Pressure Service Water System supplies raw water from Lake Wylie for makeup and cooling of various secondary plant systems. This system also receives discharges from the Nuclear Service Water System, Liquid Radwaste System (Outfall 004), and Cooling Tower Blowdown (Outfall 005).

As a result of macroinvertebrates (Corbicula: Asiatic clams) and microbiologically influenced corrosion (MIC), chemical addition is anticipated. Presently, flushing is the control method used to control the growth of the clams, however, chemical addition is anticipated to become necessary.

1 Chemicals anticipated to be added to control Corbicula and MIC include chlorine, biocides, dispersants, and corrosion inhibitors that include nitrite, silicates, molybdates, phosphates, polyphosphates, and borates. Chlorine addition at a level necessary l to maintain a low level discharge concentration of total residual chlorine (TRC) is under evaluation. Discharges to Lake Wylie would be maintained at an approved discharge concentration

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Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Resised 7/I8815 Page 7

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i 3.1.2 Liquid Radioactive Waste - Outfall 004 Outfall 004 discharges flow.,from the liquid radwaste system. This  ;

flow combines with plant once through cooling water *before  :

discharging through outfall 001. -

The liquid radwaste system collects waste floor and equipment [

drains, laundry waste, and ventilation unit drains. All waste is  !

processed to Nuclear Regulatory Commission (NRC) requirements .,

(10 CFR Part 20 and 10 CFR Part '50) prior to release with the '

type of processing depending on the type of waste. The maximum'-  :

discharge rate from radwaste is 250 gpm. Chemicals that may be present in the liquid radwasty system include:

Outfall 004 Inputs  !

boric acid borax nitrate ammonia morpholine lithium hydroxide l ethylene glycol benzotriazole(BZT) nitrite / borax i corrosion inhibitor  :

nitrite / molybdate hydrazine  !

corrosion inhibitor -

carbohydrazine chlorine or . hydrogen peroxide  ;

hypochlorite ethylene diamine 3-mpa organic -

tetracetic acid phosphonates used (EDTA) in heat exchanger lay-up  :

pump bearing laboratory surfactants  !

cleaning chemicals chemicals j detergents l polyelectrolytes industrial cleaning degreasers ,

products j defoamer

• dispersant biocides

• A defoamer is used to treat the wastewater to prevent foaming at l outfall 001 during some discharge periods.

Normally noncontaminated sumps can become contaminated with radioactivity. When this occurs, the liquid can be pumped to liquid rpdioactive waste system for treatment. The decision on the

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method of treatment depends on the amount of waste needing  !

treatment and the quality of the water being treated. When a sump Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/I8/95 Page 8 l

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is diverted to the radwaste equipment, it is considered a part of Radwaste. Chemicals listed as being in the Turbine Building Sump (in Section Outfall 002) will be in Radwaste (outfall 004 when it is routed to this path). Solids or concentrated radioactive by-product generated in the treatment process are disposed of in a State and Nuclear Regulatory Commission licensed 104 level

., radioactive waste disposal facility.

3.1.3 Cooling Tower Blowdown - Outfall 005 The Condenser Circulating Water System provides the heat sink for the main condenser and the feedwater pump turbine condensers. This is a closed loop cooling system containing 7.5 million gallons of service water per unit.

After passing through condensers, the warm water is pumped to the top of the cooling towers. This water is distributed uniformly across the top to the three cooling towers (per unit) and cascades by gravity to the floor of the cooling tower. Falling water cascades over fill material which breaks the water into droplets. Fans on the top of the towers pull ambient air in from the sides and past the falling water. From the floor of the cooling tower water flows by gravity back to the condenser.

Because of the concentrating effect of ' evaporation, a bl,owdown rate of approximately 5000 gpm is maintained per unit. BIowdown rates can be higher oflower depending upon system water quality.

The Low Pressure Service Water system provides makeup to maintain the system volume.

Chemical treatment of the cooling tower system consists of sulfuric acid, sodium hypochlorite, bromine based oxidant, an organic biocide, and a polyacrylate dispersant. Sulfuric acid is added for pH control of the towers. A polyacrylate dispersant is added for solids deposition control. Sodium hypochlorite and bromine based oxidants are added intermittently for biofouling control.

. Normal chemical additions are to the cooling towers of one unit every other day with the other unit's cooling towers blowing down to Outfall 001. It is anticipated that during those times when blowdown is necessary to prevent scaling and control algae growth, when chlorine concentrations exceed discharge specifications, and when the Conventional Waste system cannot Catawba Nuclear Station NPI)ES Permit SC0004278 Supplemental Information Revised 7/18!95 Page 9

'4 handle the additional volume, it may become necessary to add )

either sodium sulfite or sodium nitrite to the cooling towers in stoichiometric proportions for dechlorination.

Additionally, because of restrictions on and of chlorine, an organic biocide is also added for biofouling control. Currently

. approved biocides are Calgon H640, Drew Biosperse 288, Betz Slimicide C79, Buckman Bulab 6002, Calgon H-130, and Drew Biosperse 216. Only one biocide is used at a time. Multiple approvals have been obtained for bidding purposes from different chemical manufacturers.

The cooling tower blowdown is normally to the Low Pressure Service Water system however, it can be aligned to the Conventional Waste system if necessary. Discharges of cooling tower blowdown are free of detectable amount of treatmeSt chemicals and is discharged at concentrations of less than the No Observable Effect Concentration for Ceriodaphnia dubia after mixing with the low pressure service water prior to Lake Wylie. ,

During unit outages, part or all of the Condenser Circulating  !

Cooling system can be drained to outfall 001 and/or the Conventional Wastewater Treatment System, outfall 002.

3.1.4 Nuclear Service Water The Nuclear Service Water System is a once-through noi contact plant cooling water system. This system supplies cooling water to various heat loads in the Auxiliary and Reactor Buildings other .

than the secondary (steam) side of the station. It is served by Lake Wylie and the Standby Nuclear Service Water Pond - but only one pump structure.

Corrosion inhibitors are used in several system heat exchangers during wet layup conditions. Products used to perform the layup consist of carbohydrazide, nitrites, polysilicates, polyphosphates, phosphates, molybdates, and borates. These formulations would be used in conjunction with a dispersant and penetrant for deposit control and a biocide for biofouling control. These products would be used so that release concentrations would be below the No Observable Effect Concentration for Ceriodaphnia dubia.

Products used for wet layup and to control clam growth in the safety related nuclear service water system can be discharged to the Catawba Nudcar Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 10

Standby Nuclear Service Water Pond during required system testing (below the NOEC concentration). Also, low concentrations of these products may be discharged to the pond if the discharge path to Lake Wylie automati,cally swaps the discharge to the pond.

However, product biodegradation and system demand would

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minimize the discharge concentration.

3.2 Flows Discharge 5 Year 5 Year Average Maximum (mgd) (mgd)

Low Pressure Service Water and Nuclear Service Water 69.2 138.5 Liquid Radioactive Waste 0.04 1.77 Cooling Tower Blowdown 4.4 13.7 Total Flow Outfall 001 73.64 153.97 3.3 Chemical & Characteristics This outfall consists primarily of raw water from Lake Wylie and. is used for plant cooling and receives no treatment prior to discharge! Any chemical additions have been described previously and are monitored in accordance with the NPDES permit requirements.

4.0 Outfall 002 4.1 Description of Discharge Outfall 002 discharges flow from the Conventional Wastewater Treatment system through a Parshall flume into the Big Allison Creek arm of Lake Wylie. This system consists of the following:

1 Initial Holdup Pond Concrete 300,000 gallons 2 Settling Ponds Clay Lined 5,000,000 gals each IFinal Holdup Pond Polymer Lined 1.5 million gallons Normally, inputs are received in the Initial Holdup Pond (IHP) which serves a' surge-dampening function to the settling ponds and also allows heavy solids to settle for periodic removal. Solids removed from the IHP Cataw ba Nuclear Station NPDES Pennit SC0004278 Supplemental Infonnation l

Revised 7/l8/95 Page 11

id are dewatered and disposed in a licensed landfill. Inputs can bypass the i Initial Holdup Pond and be directed to the in-service settling pond if  !

necessary. l From the Initial Holdup Pond flow is directed to the in-service settimg i

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pond where chemical treatment, mixing, and aeration take place. S*tilfuric

.. acid and sodium hydroxide are added for pH control. Coagulants can also be added to facilitate the settling of small particles. Additionally, it may be necessary infrequently to oxidize persistent chemicals, with the use of i hypochlorite (sodium or calcium) or hydrogen peroxide.

The settling ponds can discharge directly to Lake Wylie via outfall 002, or be directed to the Final Holdup Pond (FHP) for additional treatment or holdup capacity. Treatment in the WC System is on a batch basis.

Discharge flowrates can range between 800 gpm and 2000 gpm.

Recirculation capability is available for recirculation intra- or inter-basin.

The WC System receives inputs directly from the service building sump, turbine building sumps, diesel generator catchment sumps, step-up transformer base drainage sumps, sulfuric acid tank containment drainage sump, cooling tower blowdown, secondary containment sumps, and rainwater from various sources.

The WC system has an approved groundwater monitoring program which consists of four monitoring wells. Groundwater samples are c'ollected, analyzed, and the results reported to SCDHEC in accordance with the approved groundwater monitoring plan.

4.1.1 Service Building Smnp The Service Building Sump receives inputs from the water treatment room, diesel generator room sumps, and the service building floor drains. The sump has an approximate holding volume of 26,500 gallons and two pumps, each with a capacity of '

1350 gpm. Normal alignment is to the Conventional Waste system  !

directly, but can be through the turbine building sump. I The service building floor drains receive miscellaneous leakage and drainage. Chemical inputs include:

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Catawba Nuclear Station NPDES Permit SC0004278 Supplernental Information Revised 7/lH/95 Page 12

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Service Building Sump Inputs  !

hydrazine trisodium phosphate ammonia ,

morpholine sodium hydroxide sulfuric acid, cationic polyclectrolytes alum ethylene glycol Cornmercial prepared sodium sodium benzotriazole (BZT) biocides (Calgon nitrite / borax / sodium H-303, Calgon 11-130) benzotriazole (BZT) corrosion - or similar products inhibitor or similar industrial cleaning products laboratory chemicals citric acid ETA oils coagualants 3-MPA Carbohydrazide DMA 4.1.2 Water Treatment Room ,

The Water Treatment Room produce; filtered water and demineralized water. All chemicals used, all leakage and drainage, and all wastes produced go directly to the service building sump.

i Filtered water is made by taking lake water, adding a coagulant, filtering up through one of two gravel-to-sand beds and chlorinating with chlorine gas to approximately 1.5 mg/l Free Available Chlorine (FAC). When solids are elevated in the lake, alum (aluminum sulfate) may also be used. The beds are flushed on pressure buildap with high velocity lake water.

Approximately quarterly, or when necessary, each bed is cleaned with approximately 200 gallons of 35% hydrogen peroxide and a surfactant. The peroxide and surfactant is added, the bed is air mixed, allowed to soak, and flushed. The peroxide / surfactant ,

cleaning dissolves mud balls that may have formed. Yearly, approximately 1000 pounds of sand are replaced in each bed as a result of nomial losses from backwash carryover. l t

Demineralized water is made by passing filtered water through a carbon bed or a reverse osmosis unit and then through a regenerative resin bed. There are two carbon beds, a reverse osmosis unit, and two resin beds. Each carbon bed contains 270 p3 nd a is replenished yearly. Each resin bed contains 510 f13 and is replenished every 3 to 5 years. To regenerate the resin, sulfuric  ;

acid and sodium hydroxide are flushed through the bed. '

t Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 13  ;

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Each normal regeneration, at the present time, takes approximately ,

98 gallons of 93% sulfuric. acid and 330 gallons of 50% sodium hydroxide. Regeneration oc, curs approximately once a month. The amounts of required acid and caustic will vary as dictated by 8

operational requirements.

Approximately . quarterly, each resin bed is surfactant cleaned to remove organic film on the resin.' ,

4.1.3 Diesel Generator Room Sumps The diesel generator room sumps receive inputs from leakage or draining the diesel generator engine cooling water, fuel oil, and '

lubrication systems. Each of the four sumps has a volume of approximately 470 gallons and two pumps, each with a capacity of -3 50 gpm. '

The diesel generator engine cooling water systems have a volume _ j of 2240 gallons each. The systems are treated with a mixttire of sodium nitrite, borax (sodium tetraborate), sodium bicarbonate and I sodium mercaptobenzothiazole (MBT) to maintain a minimum-concentration of 2000 mg/l as nitrite. To control' bacteria, an approved biocide is added.

The diesel generator fuel oil and lubrication systems can drain to the sumps, but administrative controls block intentional draining.

For emergency spills, an oil coalescing unit is installed between the

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sumps and the service building sump. Additionally, the fuel oil {

contains residual biocide to reduce bacterial breakdown 'of the oil.  ;

1 4.1.4 Turbine Building Sumps '

The turbine building sumps receive inputs from steam generator wet lay-up chemicals, cooling tower drainage (unwatering),

reverse osmosis treatment unit, auxiliary building floor drain sumps, and the turbine building floor drains. Each sump has an approximate capacity of 12,000 gallons and three pumps, each with -

a capacity of 1350 gpm. Normal alignment is directly to the l

Conventional Waste system. Ilowever, hose connections on the discharge of the pumps allow rerouting to other sumps for unusual circumstances.

Catawba Nuclear Station NPDES Permit SC0004278 Supplemental information Revised 7/18/95 Page 14

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4.1.5 Wet Lay-up During shutdowns, the steam' generators and hotwell are placed in wet lay-up to prevent corrosion. Prior to start-up, the solution is drained. Steam generator ahd hotwell wet lay-up can be diverted to the turbine building sump. Each of the four steam generasors per unit has a maximum volume of 30,000 - gallons. Maximum chemical concentrations should be 200-300 mg/l for corrosion

' control using either hydrazine or carbohydrazide with the pH adjusted to 10.5 with ammonium hydroxide. The hotwell per unit will contain approximately 200,000 gallons. Maximum chemical concentrations should be approximately 50 mg/l hydrazine with the pH adjusted to 10.5 with ammonium hydroxide.

4.1.6 Auxiliary Building Floor Drain Sumps ,

Auxiliary building floor drain sumps can _be diverted to the l turbine building sumps. Each sump has an approximate capacity of 500 gallons and two pumps, each with a capacity of 50 gpm. Inputs consist of equipment drainage, air handling unit condensate,  ;

sample line purge, floor wash water and lah drains.

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Chemicals that may be present include:

Auxiliary Building Floor Drain Sumps boric acid borax nitrate ammonia morpholine lithium hydroxide ethylene glycol benzotriazole(BZT) nitrite / borax corrosion inhibitor sodium carbonate nitrite / molybdate hydrazine  ;

corrosion inhibitor carbohydrazine chlorine or hydrogen peroxide j hypochlorite i

ethylene diamine 3-MPA, ETA, or organic tetracetic acid DMA as amines in phosphonates used (EDTA) the secondary in heat exchanger l system lay-up i chemicals pump laboratory surfactants i bearing cleaning chemicals chemicals polyelectrolytes industrial eleaning . degreasers products sodium metasilicate sodium hydroxide phosphate

" detergents carbohydrazide defoamer dispersant biocides l

Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18!95 Page 15 i

• e 4.1.7 Turbine Building Floor Drains The turbine building floor drains receive miscellaneous leakage and drainage. Inputs include; Turbine Building Floor Drains

, laboratory samples industrial cleaning powdered or bead products resin oil hydrazine ammonia morpholine service building boric a,cid sump 3-MPA DMA ETA carbohydrazide hypochlorite bromine molybdates ethylene glycol nitrites 4.1.8 Diesel Generator Catchment Sumps The diesel generator catchment sumps receive inputs from the fuel oil unloading pads, Containment Mechanical Equipment Building sumps, contaminated drum storage area sump, hydrogen / oxygen generator, standby shutdown facility, and raimvater. The Unit 2 sump pumps to the Unit I sump with each sump having two pumps. Each pump has a capacity of 250 gpm and 110 gpm, Unit I and 2, respectively. Unit I sump consists of two separate volumes - one to receive all flow and the,6ther to house the pumps. A partial concrete wall separates the volumes, allowing flow under the wall only, which minimizes oil from getting to the pump suction.

Additional chemical inputs include a sodium nitrite / borax / sodium bicarbonat'e corrosion inhibitor (approximately 2000 mg/l) from leakage or drainage, ethylene glycol and nitrite / borax / hydroxide corrosion inhibitor from the Standby Shutdown Facility cooling system, and residual biocide in the fuel oil.

4.1.9 Step-up Transformer Base Drainage Sumps The step-up transformer base drainage pumps receive rainwater and oilleakage from the curbed bases under the main step-up, auxiliary step-up, and auxiliary electric boiler transformers.

Each sump consists of two separate volumes, one to receive all flow and the other to house the pumps. A partial concrete wall separates the volumes, allowing flow under the wall only which Catawba Nuclear Station NPDES Permit SC0004278 SupplementalInformation Revised 7/lS!95 Page 16

should minimize the possibility of oil getting to the suction of the pumps.

The required minimum fluid capacity in the oil holdup section is 12,716 gallons. The requir6d minimum holding capacity in the

. water pump section is 6,358 gallons. Each sump has two9 umps with a capacity of 800 gpm each.

4.1.10 Sulfuric Acid Tank Containment Drainage Sump The sulfuric acid tank containment drainage sump receives inputs from rainwater, laboratory drains, industrial strength cleaning chemicals, and tank containments. The approximate holding capacity is 225 gallons with pump capacity of 35 gpm.

Tank containments incluoe: -

15% sodium hypochlorite 16,000 gallons 50% sodium hydroxide 1,500 gallons biocide 3,800 gallons dispersant 7,600 gallons 93% sulfuric acid 30,000 gallons Curbing provides secondary containment for each of these tanks.

This curbing is sufficient to contain the entire contents of each tank in case of a leak.

4.1.11 Secondary Containment Sumps Secondary containment sumps receive input froin the yard drains. -

Three 10,000 gallon sumps are available for spills or rainfalls less than 10,000 gallons. The sumps can pump to the initial or final holdup pond. By design, greater than 10,000 gallons will put the sump in overflow directly to Lake Wylie.

Other than spills or rainfall, actuation or testing of the chlorinated fire protection system in the yard could overflow a sump. He groundwater drainage system from the plant discharges to the yard drains. Additionally, the switchyard for the site contains two oil  :

trap tanks. Rainfall collected from the switchyard flows through these tanks. These tanks will contain any oil spilled or leaked in Jhe switchyard.

Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 17 I

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s 4.1.12 Miscellaneous A 2% solution of ghtaraldehyde is used in cleaning respirators.-

This cleaning genereies approximately 250 gallons of waste per year.

There are approximately 25 to 30 closed cooling systems within

. the station. The largest system has a volume of approximately l 44,000 gallons. The main portions of these systems are constmeted of carbon steel. Corrosion inhibitors consisting of nitrites, molybdates, ethylene glycol, carbohydrazide, borax, benzotriazole (BZT), carbonates and hydroxides are added for corrosion control.

l An organic biocide and a dispersant is added to control biofouling and a dispersant is also utilized.

4.2 Flows The settling ponds can discharge directly to Lake Wylie via outfall 002, or l be directed to the Final Holdup Pond for additional treatment or holdup .

capacity. Discharge flowrates can range between. 800 gpm and 2000 gpm. j Recirculation capability is available for recirculation intra- or '

inter-basin.

Discharge for outfall 002 is by batch discharge. Flows are measured at outfall 002 for each discharge from the treatment system. The following flows are from the previous five years of operation. The average value shown is based upon the total volume discharged divided by the number of days that discharge occurred.

5 Year Average 5 Year Maximum Design Maximum (MGD) (MGD) (MGD)

Total Flow Outfall 002 1.29 2.45 2.88 4.3 Chemicals and Characteristics I

The expected chemical inputs to this outfall are described above.

l 4.4 T.eatment Treatment in the WC System is on a batch basis.

J Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 18

4.4.1 Initial Holdup Pond Settling oflarge solids s

4.4.2 Settling Ponds A &B

• 8 Chemical treatment, mixing, and aeration. Sulfuric acid and sodium hydroxide are added for pH control. Coagulants can also be added to facilitate the settling of small particles. Additionally, it may be necessary infrequently to oxidize persistent chemicals, with the use of hypochlorite (sodium or calcium) or hydrogen peroxide. To control the use of algae an algicide, such as CUTIUNE-PLUS, is used in the system.

5.0 Outfall 003 5.1 Description of Discharge Outfall 003 discharges flow from the Sanitary Waste Treatment System into the Big Allison Creek arm of Lake Wylie. The sewage treatment system consists of a 1.28 million gallon aeration basin that is divided into four sections and a 0.525 million gallon effluent polishing basin..

5.2 Flows .

Discharge from outfall 003 is continuous. The following flows are from the previous five years of operation. Design flow is 0.080 MGD 5 Year Average 5 Year Maximum (MGD) (MGD)

Total Flow Outfall 003 0.035 1.77 5.3 Chemical & Characteristics The Sanitary Waste Treatment receives raw sewage from Catawba Nuclear Station, the Catawba Training Center, and other buildings located on the site, sink drains, shower drains, and drinking water fountains. Soaps and industrial cleaning supplies are expected inputs to this system also, i l

1 Catawba Nuclear Station NPDES Pennit SC0004278 Supplemental Information Reviwd 7/18/95 Page 19 i

'6

.o This system also receives flow from the oil / water separator and drains located at the transportation garage located on site. The grease trap  !

located at the site cafeteria also flows to this treatment system.

It may be necessary to periodically remove sludge from the system. The sludge will either be tanked to a municipal sewage treatment syaem or ,

dewatered and disposed ofin a State licensed landfill or landfarm.

Small amount of photographic waste (developer and rinse) are disposed of in the WT system. The components of these substances include:

acetic acid potassium sulfite potassium hydroxide hydroquinone 1-phenyl-3-pyrozolidione glutaraldehyde bisulfite l glutaraldehyde 5.4 Treatment Inputs to the sewage treatment system pass through a grit chamber which allow heavy solids to settle out and a bar screen to remove large non-sewage objects and to break large particles. It then passes through a comminutor which cuts and shreds large solids into smaller particles which are more easily digested. From the comminutor, the sewage enters the four cell aeration lagoon where the sewage is decomposed by aerobic -

bacteria. '

s Aeration is provided by blowers / compressors. From the fourth cell, the sewage enters the efiluent polishing basin or can be directly discharged to Lake Wylie through outfall 003 if of acceptable quality. The effluent polishing basin is also aerated by blowers which reduces suspended solids, nitrogen, and phosphorous levels. A soda ash solution is added to the efiluent of the polishing pond as necessary for pH control.

He effluent flows through a Parshall flume to record discharge flow.

After this flow passes through a tablet chlorinator, and a chlorine contact chamber, a tablet dechlorinator system. and a dechlorinator contact chamber before being discharge to Lake Wylie. The chlorinator system is not used unless it is necessarfi n order to meet the fecal coliform limits imposed by the permit.

Catawba Nuclear Station NPDIiS Permit SC0004278 Supplemental Information Resised 7/18/95 Page20

6.0 Outfall 004 This outfall is described with outfall 001 (See Section 3.1.3) since it is an internal outfall which discharges to Lake Wylie through outfall 001.

7.0 Outfall 005 s This outfall is described with outfall 001 (See Section 3.1.4) since it is an internal outfall which discharges to Lake Wylie through outfall 001. This outfall can also discharge to Lake Wylie via outfall 002. ,

t 8.0 Miscellaneous Operations 8.1 Fire System Water supply for fire Protection is provided by three full capacity (250 gpm) fire pumps. In addition, two 25 gpm and one 200 gpm jockey pumps (supplied by the Filtered Water System) are provided to prevent frequent staning of the main fire pumps to maintain pressure in the yard mains. If system needs cannot be met with the jockey pumps, the main fire pumps l start in sequence as the pressure in the yard mains drop. The system is chlorinated to prevent the survival of Corbicula within the system.

System operability is demonstrated by periodically performing specific tests on the system as described in the March 4, 1986 correspondence with SCDHEC. '

Testing is performed in such a manner as to minimize the discharge of chlorine to Lake Wylie as described in the Department of Health and F m tronmental Control letter dated May 2,1986.

8.2 Drinking Water System Flushes Potable water is supplied to the station by York County. A municipal drinking water connection to the site occurred in 1993. Periodically, when new lines are disinfected or repairs are made to existing lines, the lines are flushed as required by the State drinking water regulations. Where possible, these discharges will be routed to a treatment system.

8.3 Cooling Tower Drainage After thq initial drainage of the Condenser Circulating Cooling system and

, during system maintenance, a pump is used to dewater any miscellaneous water which leaks into the system. This water, which is raw lake water, is Ceewba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 21

pumped into the yard drain system which discharges directly to Lake Wylie..

8.4 Miscellaneous System / Component Cleaning s

8.4.1 Mechanical Cleanings Heat ~ exchanger and cooling water pipes are periodically mechanically cleaned with brushes, rods, high pressure water, hydrolaze and other physical means. No chemicals are used during these cleanings, solids are trapped or filtered at the source, and the water flow discharges to the various stations sumps described above.

8.4.2 Chemical Cleanings Systems may need to be cleaned periodically because of scaling or plugging. Other components will be cleaned as necessary for various fouling problems. Solutions utilized will be standard chemical cleaning methodologies. Chemicals utilized by these methodologies, alone or in combination, include the following:

Alkaline Boilout Solutions .

non-ionic cationic surfactants sodium hydioxide surfactants Ianionic surfactants trisodium phosphate sodium metasilicate soda ash monosodium sodium bicarbonate phosphate disodium phosphate Acid Solutions &

Additives hydrochloric acid sulfuric acid phosphoric acid formic acid hydroxyacetic acid sulfamic acid citric acid nitric acid ammonium oxalic acid thiourea bifluoride Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 22

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EDTA Compounds

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and IIEDTA pli adjusted tetra-ammonium di-ammonium tetra-ammonium EDTA EDTA l EDTA '

I hydroxyethylenedia tetra-sodium EDTA '

, minetriacetic acid

, Miscellaneous j Compounds ,

sodium chloride chlorine potassium  !

(hypochlorite) permanganate I agua ammonia ammonium sodium nitrite persulfate l antifoam sodium sulfite corrosion inhibitors (e.g., phosphates, ,

borax-nitrite, silicates, etc.)

organic biocides chlorothene i

i These solutions are described in the Development Documentfor Effluent Limitations Guidelines and New Source Performance >

Standardsfor the Steam Electric Power Generating Point Source  ;

Category (Development Document). ,,  !

. t The spent solvents from these cleanings will be treated in the WC [

System (Outfall 002) or the Radwaste System (Outfall 004). The  !

acid compounds will be neutralized; the other compounds will be i mixed, oxidized, and/or precipitated as necessary for treatment.  ;

i 8.5 Stormwater Discharges Stormwater discharges are regulated under NPDES General Permit for Stormwater Discharges Associated With Industrial Activity -

Permit Number SCR000000.  !

l 9.0 Other Environmental Permits l l

9.1 Landfill Permit /I463303-1601 issued by South Carolina Department of Health and Environmental Control.

Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Resised 7/18/95 Page 23

. 1 9.2 Stormwater Permit #SCR000000 issued by Sou,th Carolina Department of Health and Environmental Control.

9.3 Air Permit Permit #2440-0070 issued by South Carolina Department of Health and Environmental Control.

9.4 RCRA Part A (Interim Status) 9.5 Underground Storage Tank Permits 9.6 Asbestos Permit #8044 issued by South Carolina Department of Health and Environmental Control.

10.0 Section 3II Exemption The legislative / regulatory history of the Clean Water Act, Section 311, indicates that an exemption would be allowed where an on-site spill is procered through a treatment system capable of eliminating or abating the spill. A Section 311 exemption is therefore requested for the following substances: '

15% sodium hypochlorite 10,000 gallons 50% sodium hydroxide 1,500 gallons biocide 3,800 gallons dispersant 7,000 gallons 93% sulfuric acid 30,000 gallons caustic 5000 gallons Curbing sufficient to contain the entire contents of the tank is provided. Drainage from the curbed area is to the WC system via the Service Building Sump.

As discussed, the entire contents of these tanks are contained and are routed to the WC system. The treatment system is capable of containing the spilled material along with normal process waste flows and of mitigating / abating the effects on the receiving water since the system treats the wastes by batch, treatment capacity is 5 million gallons per batch - much greater than any of the tank volumes, and has procedural safeguards to restrict inputs to a discharging basin.

Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information l itevised 7/18/95 Page 24

-ll

Therefore, in accordance with 40 CFR 117.12 and with the legislative /

regulatory history, a Section 311 exemption is requested for these substances. j

, )

i 1.0 Section 316(a) Exemption A 31[>(a) demonstration has been submitted to the State. This study supports the thermal limitations established by the permit.

12.0 Site Layouts and Drawings 12.1 General Site Layout l

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Catawba Nuclear Station NPDES Permit SC0004278 Supplemental Information Revised 7/18/95 Page 25

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CATAWBA NUCLEAR STATION l

NPDES PERMIT #SC0004278 -

l PERMIT UPDATE 07/18/95 (THIS SHEET TO BE REPLACED BY:DHEC COVERL SHEET' WITH ISSUED DATE, EFFECTIVE DATE, AND EXPIRATION DATE) .

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Pcge 2 ef 24-Permit No. SC0004278 A. EFFLUENT LIMITATIONS AND MONITORING REDUIREMENTS

1. During the period beainnina insert new effective date and lasting through the expiration date, the Permittee is authorized to discharge from outfalt(s) serial nurter(s) 001: once through cooling water, nuclear service water, cooling tower blowdown (discharged via internat Outfall 005) and liquid radiological wastes (treated and discharged via internal Outfalt 004) to Lake Wylie.

Such discharge shalf be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE tfMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averace h Averace tim Frecuency Iygg ,

Flow-m3/ day (MGD) - -

MR MR Daily Continuous (2)

Total Residual oxidant - - less than 0.10 mg/l(3) 1/ week Multiple Grabs III Intake Temerature - - - -

Daily Continuous Discharge Tegerature - - - I'I Daily Continuous I03 Nitrite 4.3 mg/t(as NO2) Per occurrence IN Grab Biological Monitoring - - -

0 1/ quarter II 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> ccmposite (Whole Effluent Chronic Texicity Testing)

(1) See Part III, Special Condition #15 MR = Monitor and Report (2) See Part III, Special Condition #16 Based on an average flow of 73.6 MGD (3) See Part !!!, Special Condition #17 (4) The tenperature of the effluent shall be such as not to exceed a weekly average temperature of 10' C (50'F) when the weekly average intake temperature is below 2.58 C (36.5'F), exceed two (2) times the weekly average intake tenperature (eF) minus 23 when the weekly average intake temperature ranges f rom ?.5'c (36.58F) to 12.8'c (55'F), exceed a weekly average temperature of 34'c (93.2'F), and exceed a daily average temperature of 35'C (95'F).

(5) Sampling shall occur at this outfall during release of nitrites from either 001 or 004.

(6) Manual sampling per shift will occur during periods when contiuous monitor is out of service.

(7) See Fart III, Special Condition #13 ,

No chromium a-id tinc based maintenance chemicals will be allowed in the cooling tower.

2. The pH shell be monitored and reported once per week by grab sarrple.

3. There shall be no discharge of floating solids or visible foam due to station operations in other than trace amounts; nor, shall the effluent cause a visible sheen on the receiving waters.

4. Sacples taken in cocptiance with the monitoring requirements spec'ified above shalt De taken at the following location (s): The intake temperature shall be monitored at or near the plant intake. All other parameters shall be monitored at or near the point of discharge from Outfall*001 prior to mixing with the receiving waters, unless otherwise specified above.

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Psrt t Page 3 of 24 Permit No. SC0004278' .

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning insert new effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from outf alt (s) serial nunter(s) 002: tow volume wastes, and miscellaneous dilute wastewater to Lake Wylie.

Such discharge shat,t be limited and monitored by the Permittee as specified below:

• f EFFLtJENT CHARACTERISTICS DISCHARGE LIMITATIONS PhKITORINGREQUIREMENTS kg/ day (tbs / day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Average Maxim e Averaae Maximun Freauency Type i Flow-m3/ day (MGD) - -

MR MR 1/ week Instantaneous

• Total Residuat Oxidant (TRO) - -

less than 0.10 mg/l 1/(2) Grab Blochemicat Oxygen Demand (5-day) - -

MR MR 1/ month Grab Oil and Grdase - -

15 mg/l 20 mg/l 2/ month Grab Total Suspended Solids - - 30' mg/l 100 mg/l 2/ month Grab Copper, total - - 0.0125 mg/l 0.0125 mg/l 1/(2)

Iron, total - - 0.645 mg/l 0.645 mg/l 1/(2)

Hydrazine - - - 0.077 mg/l 1/gg) Grab Nitrite 4.3 mg/L(as NO2) per occur g e(1) Grab Biological Monitoring - - - 0g 1/ quarter 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> composite-(Whole Effluent Chronic Toxicity Testing)

(1) Sampling shall be conducted once per occurrence of discharge of these substances through Outfalt 002 but need not be more than twice per month.

(2) Sampling shall be conducted once per chemical metal cleaning occurrence of dischare of these substances through outfalt 002 but need not be more than twice per month. .

(3) Af ter treatment with hypochlorite has occurred in a WC pond, sanpling for TRO shall be conducted once per day oser e two day period during discharge from the WC pond.  ;

(4) See Part III, Special Condition #13 '

• see Part 111, Special condition #17 Based on an average flow of 1.29 MGD MR = Monitor and Report

2. The pH shalt not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week by grab sanple. ,

3. There shall be no discharge of floating solids or visible foam due to station operations in other than trace amounts; nor, shall the effluent cause a visible sheen on the receiving waters.

4. Sanples taken in compilance with the monitoring requirements specified above shall be taken at the following location (s): at the point of discharge from the i.. conventional waste treatment (WC) system but prior to mixing with the receiving waters.

5. Due to the intermittent and variable duration of the batch dischacges for Outfall 002, the senpling protocol for chronic testing is modified to allow Duke Power Company to conduct the chronic testing with only one or two. sanples*in instances when flow is not avaltable. .

I'

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PLrt i Page 4 of 24 Permit No. SC0004278 ~

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning insert new effective date of this permit and tasting through the expiration date, the Permittee is authorized to discharge from outfatt(s) serial ntrnber(s) 003: treated sanitary sewerage to Lake Wylle.

Suchdischargeshal(belimitedandmonitoredbythePermitteeasspecifiedbelow:

• EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS M6NITORING REQUIREMENTS kg/ day (Lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample 8verace Maximum Averace Maximtn Frecuency Tvoe Flow-m3/ day (MGD) - -

MR MR 1/ month Instantaneous

• Total Residual chlorine - -

0.5 mg/l 1.0 mg/t 1/ week Grab Total Suspended Solids - -

90 mg/l 135 mg/l 1/ month 24Hr. Composite Biochemical Oxygen Demand (5-day) - - 30 mg/l 60 mg/l 1/ month 24Hr. Composite Fecal Caliform - -

200/100 ml 400/100ml 1/mnth Grab Dissolved O m y. - - at a minimtn of 1.0 mg/l 1/ week Grab

• See Part !!!, Special Condition #16 MR = Monitor and Report

• Based on a flow of 0.035 MGD

2. The pet shall not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week by grab sample.

3. There shall be no discharge of floating solids or visible foam due to station operations in other than trace amounts; nor, shalt the effluent cause a visible sheen on the receiving waters.

4 Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location (s): at the point of discharge from the sewage treatment plant prior to mixing with the receiving waters.

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Page 5 of 24 Permit No. SC0004278 - -

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS .

1 .

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the Permittee is author'ized to discharge.from -

outfall(s) serial nurrber(s) 004: tiquid radiological wastes via Outfalt 001 to Lake Wytte.

Such discharge shal( be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCMARcE t_ IMITATIONS MONITORING REQUIREMENTS , ,

kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sanple .

Averace Maximum AYeraae Maximum Freauency Tvoe _

a Flow-m3/ day (MGD) - - MR MR 1/r,y Estimr te* a 1

Copper, total - -

1.0 mg/l 1.0 mg/l 1/gg) Grab tron, total - - 1.0 mg/l 1.0 mg/l 1/gt) Grab Hydrazine - - - 46.8 mg/l 1/gg) Grab e

• See Part III, special Condition #16 MR = Monitor and Report'

-t Based on a flow of 0.009 MGD (1) Sampling shall be conducted once per occurrence of hydrazine discharge of this substances through Outfall 004.

l 2. Samples taken in conpliance with the monitoring requirements specified above shall be taken at the following location (s): at the point of discharge from the

• liquid radiological waste treatment plant but prior to mixing with other wastewaters at outfalt 001.

This discharge is regulated by the Nuclear Regulatory Comission (NRC) and is monitored per their specifications and the results are reported to NRC.

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Page 6 of 24-Permit No. 500004278 A. EFFLUENT LIMITATIONS AND MONITORING RECUIREMENTS

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from outfatt(s) serial ntzber(s)005: cooling tower blowdown via outfall 001 to take Wylie.

Such discharge shati, be limited and monitored by the Permittee as specified below:

~

EFFLUENT CHARACTERISTICS DISCHARCE tfMITATIO43 MONITORING REcul'<EMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averace Maximtzn Averace Maximum Frecuency Tvoe Flow-m3/ day (MGD) - -

MR MR Weekly Estimate **

Free Availabt.e Oxidant - -

0.2 mg/l 0.5 mg/l 1/ week Muttiple Grabs *

• See Part III, Special Condition #15

• • See Part III, Special Condition #16 MR = Monitor and Report No chromitsn and zine based maintenance chemicals will be allowed in the cooling tower.

2. The pH shall not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week by grab sample. .

3. Sanples taken in compliance with the monitoring requirements specified above shall be taken at the following location (s): at the point of discharge from the cooling towers prior to mixing with wastewaters at outfall 001.

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. l Part i Page 7of 24 Permit No. SC0004278 PARTI B. SCHEDULE OF COMPLIANCE

1. n/a .

C. MONITORING AND REPORTING

1. Representative Sampling Samples and measurements taken as required herein shall be representative of the volume and nature of the monitored discharge.

2. Flow Measurements Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be present and used to insure the accuracy and reliability of measurements of the volume of monitored discharges. The devices shall be installed, ,

calibrated and maintained to insure that the accuracy of the measurements are con,sistent with the accepted capability of that type of device. Devices selected shall be capable of measuring flows with a maximum deviation ofless than +10% from the true discharge rates throughout the range of expected discharge volumes. The primary flow device must be accessible to the use of a continuous flow recorder.

Where a fiume is present, a separate stilling well for Department / EPA use must be provided if required by the Department.

3. Reporting Monitoring Results Monitoring results obtained each month shall be reported monthly on a Discharge Monitoring Report Form (EPA Form 3320-1). The first report is due postmarked no later than the 28th day of the month following the month this permit becomes effective. Two copies of these, and all other reports required herein, shall be submitted to the Department:

S.C. Department of Health and Environmental Control KfTN: BWPC/ Enforcement Section 2600 Bull Street Columbia, South Carolina 29201

4. Tut Procedures Test procedures for the analysis'of pollutants shall conform to regulations published pursuant to State Environmental Laboratory Certification Regulation 61-81 and Section 304(h) of the Act, as amended. (Federal Register, October 16,1973; Title 40, Chapter I, Sub-chapter D, Part 136 " Guidelines Establishing Test Procedures for the

Part I Page 8 of 24 Permit No. sC0004278 Analysis of Pollutants." Amended by Federal Register, December 1,1976, and any other amendments that may be promulgated). -

Hydrazine is hmited by this permit, however the State Environmental Certification Regulation 61-81 and the Federal Regulations ' Guidelines EstablislIing Test

. Procedures for the Analysis of Pollutants' 40 CFR 136 do not provide a certified test method for this compound. Therefore, the permittee shall monitor this parameter using test procedures which have been submitted to the Department. Other analysis which may be regulated by permit for which there is no approved regulatory method for analysis will be handled likewise.

5. Recording of Results For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall record the following informatiom

a. the exact place, date and time of sampling;

b. the dates and times the analyses were performed;

c. the person (s) who performed the analyses and the laboratory certification number where applicable.

d. the analytical techniques or methods used; and

e. the results of all required analyses.

6. Additional Monitoring by Permittee If the permittee monitors any pollutant at the location (s) designated herein more frequently than required by this permit, using approved analytical methods as specified herein, the results of such monitoring shall be included in the calculation and reporting of the values required in the Discharge Monitoring Report Form .

(EPA-3320-1). Such increased frequency shall also be indicated. Additional or accelerated monitoring may be require to determine the nature and impact of a non-complying discharge on the environment or to determine if a single non-complying sample is representative of the long term condition (monthly average).

7. Records Retention All records and information resulting from the monitoring activities required by this permit including all records of analysis performed and calibration and maintenance of i

1

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Part I Page 9 of 24 Permit No. sC0004278 instrumentation and recordings from continuous monitoring instrumentation shall be retained or a minimum of three (3) years, or longer if requested by the Department. The permittee shall furnish to the Department upon request, copies of ,

records required to be kept by this permit. ,

8. Definitions

a. The " monthly average", other than for fecal coliform, is the arithmetic mean of all samples collected in a calendar month period. The monthly average for fecal coliform bacteria is the geometric mean of all samples collected in a calendar month period. The monthly average loading is the arithmetic average of all individual loading determinations made during the month.

b. The " weekly average" is the arithmetic mean of all the samples collected during a one-week period. For self-monitoring purposes, weekly periods in a calendar month are defined as three consecutive seven day intervals

. starting with the-first day of the calendar month and a fourth interval containing seven days plus those days beyond the 28th day in a calendar month. The value to be reported -is the single highest of the four weekly averages computed during a calendar month. The weekly average loading is the arithmetic average of all individual loading determinations made during the week

c. The " daily maximum" is the highest average value recorded'of samples collected on any single day during the calendar month.

d. The " instantaneous maximum" is the highest value recorded of any sample collected during the calendar month.

e. Arithmetic Mean: The arithmetic mean of any set of values is the summation of the individual values divided by the number of individual values.

f. Geometric Mean: The geometric mean of any set of values is the Nth root of the product of the individual values where N is equal to the number of individual values. The geometric mean is equivalent to the antilo'g of the

- arithmetic mean of the logarithms of the individual values. For purposes of calculating the geometric mean, values of zero.(O) shall be considered to be one (1). ,

g. Department: The South Carolina Department of Health and Environ- 1 mental Control.

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Part i Page 10 of 24 Permit No. SC0004278

h. Act: The Clean Water Act (Formerly referred'to as the Federal Water Pollution Control Act) Public Law 92-500, as amended,

i. Grab Sample: An individual discrete or single influent or effluent portion of at least 100 milliliters collected at a time representative of the discharge and over a period not exceeding 15 minutes and retained separately for analysis.

Instantaneous flow measured at the time of grab sample collection shall be used to calculate quantity.

j. Composite Sample: One of the following four types of composite samples as defined is specified within this permit:

(1) An influent or effluent portion collected continuously over a specified period of time at a rate proportional to the flow.

(2) A combination of not less than 8 influent or effluent grab samples

. collected at regular (equal) intervals over a specified period of time, properly preserved, (See part I.C.4.) and composited by increasing the volume of each aliquot in proportion to flow. If continuous flow measurement is not used to composite in proportion to flow, the following method will be used: Take an instantaneous flow measurement each time a grab sample is collected. At the end of the sampling period, sum the instantaneous flow measurements'to obtain a total flow to determine the partial amount (percentage) of each grab sample to be combined to obtain the composite sample.

(3) A combination of not less than 8 influent or effluent grab samples of equal volume but at variable time intervals that are inversely proportional to the volume of the flow. That is, the time interval between al aliquots is reduced as the volume of flow increases.

(4) A combination of not less than 8 influent or effluent grab samples of constant (equal) volume collected at regular (equal) time intervals over a specified period of time, while being properly preserved.

l Continuous flow or the sum of instantaneous flows meas 0 red and l

averaged for the specified compositing time period shall be used with composite sample, results to calculate quantity.

Part 1 Page 11 of 24 Permit No. sC0004278

9. Right of Entry The permittee shall allow the Commissioner of the Department of Health and Environmental Control, the Regional Administrator of EPA. and/or their authorized representatives:

a. To enter upon the permittee's premises where a regulated facility or activity and effluent source is located in which any records are required to be kept under the terms and conditions of this permit, and,

b. At reasonable times to have access to and copy any records required to be kept under the terms and conditions of this permit; to inspect any facilities, equipment (including monitoring and control equipment), practices or operations regulated or required under this permit and sample or monitor any substances or parameters at any location for the purposes of assuring perrnit compliance.

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0 Part Il Page 12 of 24 Permit No. SC0004278 PART II A. GENERAL REQUIREMENTS ,

1. Duty to Comply .

'The permittee must comply with all conditions of this permit. Any permit non-compliance constitutes a violation of the Act and the S.C. Pollution Control Act and is grounds for enforcement action; for permit termination, revocation and reissuance, or modification; or for the denial of a permit renewal application.

2. Civil and Criminal Liability

a. Any person who violates a term, condition or schedule of compliance contained within this permit is subject to the actions defined by Sections 48-1-320 and 48-1-330 of the S.C. Pollution Control Act.

b. Except as provided m permit conditions on " bypassing" (Part II, C.2.), nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for non<ompliance.

c. It shall not be an acceptable defense of the permittee in an enforcement action that it would have been necessary to halt or reduce a permitted activity in order to maintain compliance with the conditions of this permit. .

d. It is the responsibility of the permittee to have a treatment facility that will meet the final effluent limitations of this permit. The approval of plans and specifications by the Department does not relieve the permittee of responsibility for compliance.

3. Oil and Hazardous Substance Liability l Nothing in this permit shall be construed to preclude the institution of any legal  !

action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to under Section 311 of the Act, the S.C.

Pollution Control Act or applicable provisions of the S.C. Hazardous Waste Management Act and the S.C. Oil and Gas Act. .

4. I'ermit Modification l

a. The permittee shall furnish to the Department within a reasonable time any  ;

relevant information which the Department may request to determine whether

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i Part 11 Page 13 of 24 Permit No. SC0004278 cause exists for modifying, revoking and reissuing, or termmating the permit, or to determine compliance with the permit. -

b. Upon sufficient cause, this permit may be modified, revoked, rei,ssued, or terminated during its term, after public notice and opportunity for a hearing.

Modifications deemed to be minor will not require public notice.

c. The filing of a request by the permittee for a permit modification, or a notification of planned changes or anticipated non-compliance, does not stay any permit condition.

5. Toxic Pollutants Notwithstanding Part ILA.4. above, if a toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) is established under Section 307(a) of the Act for a toxic pollutant which is present in the discharge and such standard or prohibition is more stringent than any limitations for such pollutant in this permit, this permit shall be revised or modified in accordance with the toxic effluent standard or prohibition and the permittee so notified.

6. State Laws Nothing in this permit shalt be construed to preclude the institution of any. legal action or relieve the permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State law or regulation under authority preserved by Section 510 of the Act.

7. Property Rights The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any infringement of Federal, State, or local laws or regulations.

8. Severability The provisions of this permit are severable, and if any provisions of this permit, or the application of any provision of t,his permit to any circumstances, is held invalid, the application of such provision to other circumstances, and the remainder of this permit shall not be affecte21 thereby.

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Part II Page 14 of 24 Permit No. sC0004278

9. Onshore and Offshore Construction This permit does not authorize or approve the construction of any onshore or offshore physical structures or facilities or the undertaking of any work in any navigable waters.

B. REPORTING REQUIREMENTS

1. Change in Discharge ,

All discharges authorized herein shall be consistent with the terms and conditions of this permit. The discharge of any pollutant identified in this permit more frequently than or at a level in excess of that authorized shall constitute a violation of the permit. Any planned facility expansions, production increases, or process modifications which will result in a new or different discharge of pollutants must be reported by submission of a new NPDES application or, if such changes will not vio-late the effluent limitations specified in this permit, by notice to the Department of such changes. Following such notice, the permit may be modified to specify and limit any pollutants not previously limited.

2. Twenty-Four Hour Non-Compliance Reporting

a. The permittee shall report any'non-compliance with provisions specified in this permit which may endanger public health or the environment. The permittee shall notify the Department orally within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of becoming aw' are of such conditions. During normal working hours call 803/734 5300. After hour reporting should be made to the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Emergency Response telephone number 803/253-6488. The permittee shall provide the following information to the Department in writing, within five (5) days of becoming aware of such conditions:

1. A description of the discharge and cause of non-compliance; and,

2. The period of non-compliance, including exact dates and tirnes; or, if not corrected, the anticipated time the non-compliance is expected to continue, and steps being taken to reduce, eliminate and prevent recurrence of the non-complying discharge. ,

b. The following violations shall be included in a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> report when they might endanger health or the environment:

1. An un' anticipated bypass which exceeds any effluent limitation in this permit;

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Part ti Page 15 of 24 Permit No. SC0004278

2. Any upset which exceeds any effluent limitation in the permit.

c. As soon as the permittee has knowledge of or anticipates the need for a bypass, but not later than 10 days before the date of the bypass, it shall notify the Department and provide a determination of the need for bypass as well as the anticipated quality, quantity, time of duration, and effect of the bypass.

3. Other Non-Compliance The permittee shall report in narrative form, all instances of non-compliance not previously reported under Section B, Paragraph B.2., at the time Discharge Monitoring Reports are submitted. The reports shall contain the information listed in Paragraph B.2.a.

4. Transfer of Ownership or Control A permit may be transferred to another party under the following conditions:

a. . The permittee notifies the Department of the proposed transfer at least thirty (30) days in advance of the proposed transfer date;

b. A written agreement is submitted to the Department between the existing and new permittee containing a specific date for the transfer of permit responsibility, coverage, and liability for violations up to that date and thereafter.

Transfers are not effective if, within 30 days-of receipt of proposal, the Department disagrees and notifies the current permittee and the new permittee of the intent to modify, revoke and reissue, or terminate the permit and to require that a new application be filed.

5. Expiration of Permit The permittee is not authorized to discharge after the expiration date of this permit, unless a completed application for reissuance is submitted no later than 180 days prior to the expiration date. Permission may be granted to submit an application later than this, but not later than the expiration date of the permit. In accordance with Section 1-23-370 of the code of laws of South Carolina, if a timely and sufficient application is made for any activity of a continuing nature, the existing permit does not expire until a final

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determination is made to renew or deny renewal of the existing permit.

6. Signatory Requirements ,

All applications, reports or information submitted to the Department shall be signed and certified.

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. Part !!

Page 16 of 24 Permit No. SC0004278

a. All permit applicatins shall be signed as follows:

1. For a corporation: by a principal executive officer of at least the level of vice-president or by a du!y authorized representative;

. 2. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or,

3. For a municipality, State, Federal or other public agency: by either a principal executive officer or ranking elected official.

b. All reports required by the permit and other information requested by the Depanment shall be signed by a person described above or by duly authorized representation only if:

1. The authorization is made in writing by a person described above and submitted to the Department;

2. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity, such as the position of plant manager, superintendent, or position of equivalent responsibility. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.)

7. Availability of Repons Except for data determined to be confidential under Section 48-1-270 of the S.C.

Pollution Control Act, all reports prepared in accordance with the terms and conditions of this permit shall be available for public inspection at the offices of the Department and the Regional Administrator. As required by the Act, effluent data shall not be considered confidential. Knowingly making any false. statement on any such report may result in the imposition of criminal penalties as provided for in l Section 48-1-340 of the S.C. Pollution Control Act.

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8. Changes in Discharges of Toxic Pollutants or Hazardous Substances as The permittee shall notify the Department as soon as it knows or has reason to believe that any activity has occurred or will occur which would result in the discharge in any outfall of: '

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Part !! .l Page 17 of 24  !

Permit No. sC0004278

' 1. Any-toxic pollutant (s)' identified under Section 307(a) of the Act which . ,

exceed the highest of the following concentrations and are not limited m j the permit. , l

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1 mg/l for antimony (Sb);  ;

0.500 mg/l for 2,4-dinitrophenol or 2-methyl, -4,6-dinitrophenol; . ,

' 0.200 mg/l for acrolein or acrylonitrile;  ;

i 0.100 mg/l for any other toxic pollutant; or, Ten (10) times the maximum concentration value reported in the permit application.  ;

2. Any hazardous substance (s) identified udder Section 311 of the Act as determined by Federal Regulation 40 CFR 117.-

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b. The permittee must notify the Department as soon as it knows or has reason'to believe that it has begun or expects to begin to use or manufacture as an intermediate or final product or by-product any toxic pollutant or hazardous substance which was not reported in'the permit application. -

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Part 11 Page 18 of 24 Permit No. SC0004278 C. OPERATION AND MAINTENANCE

1. Facilities Operation .

a. The permittee shall at all_ times properly operate and maintain all facilities and systems of treatment and contal (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance includes effective performance based on design facility removals, adequate funding, adequate operator staffing and I

training, and adequate laboratory and process controls as determined by the laboratory certification program of the Depanment. This provision requires the operation of back-up or auxiliary facilities or similar systems only when necessary to achieve compliance with the conditions of the permit. Maintenance of facilities, which necessitates unavoidable interruption of operation and degradation of effluent quality shall be scheduled during non-critical water quality periods and carried out in a manner approved by the Department.

b. . The permittee shall provide for an operator, as cenified by the South Carolina Board of Certification for Environmental Systems Operators, with a grade equal l

to or higher than the classification designated in Part IIIA3. The name and grade - <

of the operator of record shall be submitted to the Department prior to placing )

the facility into operation. A roster of operators associated with the facility's operation and their cenification grades shall also be submitted with the name of the " operator-in-charge". Any changes in operator or operatod shall be submitted to the Department as they occur.

2. Bypassing Any intentional divrsion from or bypass of waste streams from any ponion of wastewater collection and treatment facilities which is not a designed or established operating mode for the facility is prohibited except (a) where unavoidable to prevent loss of life, personal injury or severe property damage, or (b) where excessive storm drainage or run-off would damage any facilities necessary for compliance with the effluent limitations and prohibitions of this permit and there were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities or retention of untreated wastes. " Severe propeny damage" does not mean economic loss caused

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by delays in production.

3. Duty to Mitigate, Halt or Reduc,e Activity The permittee sh'all take all reasonable steps to prevent, minimize or correct any adverse impact on public health or the environment resulting from non-compliance with this permit. Upon reduction, loss, or failure of the treatment facility, the

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Part Il Page 19 of 24 Permit No. SC0004278 permittee shall, to the extent necessary to maintain compliance with this permit, control production or all discharges or both until the facility is restored or an alternative method of treatment is provided.,

4. Power Failures In order to maintain compliance with the effluent limitations and prohibitions of this permit, the permittee shall either:

a. provide an alternative power source sufficient to operate the wastewater control facilities; or, have a plan of operation which

b. Halt, reduce, or otherwise control production and/or all discharges upon the reduction, loss, or failure of the primary source of power to the wastewater control facilities. ,

5. Removed Substances Solids, sludges, filter backwash or other residuals removed in the course of treatment or control of wastewaters shall be disposed of in a manner such as to prevent such materials from entering State waters and in accordance with guidelines issued pursuant to Section 405 of the Act, and the terms of a construction or NPDES and/or solid or hazardous waste permit issued by the Department.

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s I

Partill Page 20 of 24 Permit No. sC0004278 PART III .

A. OTHER REQUIREMENTS

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1. The Permittee shall maintain at the permitted facility a complete Operations and l Maintenance (O & M) Manual for the waste treatment plant. The manual shall be made available for on-site review during normal working hours. The manual shall i contain operation and maintenance instructions for all equipment and appurtenances  !

associated with the waste treatment plant. The manual shall contain a general I description of the treatment process (es), operating characteristics that will produce I maximum treatment efficiency, and corrective action to be taken should operating difficulties be encountered.

1

2. The Permittee shall provide for the performance of routine daily treatment plant inspections by a certified operator of the appropriate grade as defined in Part II.C.1.

Friday, Saturday, Sunday and holiday inspections may be performed by an operator with a minimum classification of "D-Biol." certification. The inspection shall include, but is not limited to, areas which require a visual observation to determine efficient operations and for which immediate corrective measures can be taken using the O &

M manual as a guide. All inspections shall be recorded and shall include the date, time and name of the person making the inspection, corrective measures taken, and routine l equipment maintenance, repair, or replacement performed as applicable. The facility  !

designated "C-biol." operator will review and validate all inspection sheets, generated ]

by the "D-Biol." operator. Any unusual or significant problems encountered by the j "D-Biol." operator shall be immediately corrected per the O & M manual and/or reported to the designated "C-Biol." . The Permittee shall maintain all records of inspections at the permitted facility as required by Part I.C.7., and the records shall be made available for on-site review during normal working hours.

i 3. The wastewater treatment plant has been assigned a classification of Group II-B in the I Permits to Construct which are issued by the Department. This classification corresponds to an operator with a Grade of C-biological or higher.

4. The Permittee shall maintain an all weather access road to the wastewater treatment plant and appurtenances at all times.

5. The Permittee shall continue to maintain a Best Management Practices (BMI) 5 plan to identify and control the discharge of significant amounts of oils and the hazardous and toxic substances listed in 40 CFIL Part 117 and Tables II and III of Appendix D to 40 CFR Part 122. The plan shall include a listing of all potential sources of spills or leaks l

of these materials, a method for containment, a description of training, inspection and security procedures, and emergency response measures to be taken in the event of a

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Part !!!

Page 21 of 24 Permit No, sC0004278 discharge to surface waters or pla'ns and/or procedures which constitute an equivalent BMP. Sources of such discharges may include materials storage areas; in-plant transfer, process and material handling areas; loading and unloading operations; plant site runoff; and sludge and waste disposal areas. The BMP plan shall be developed in accordance with good engineering practices, shall be documented in narrative form, and shall include any necessary plot plans, drawings, or maps. The BMP plan shall be maintained at the plant site and shall be available for inspection by EPA and Department personnel.

6. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid.

7. The permittee shall monitor all parameters consistent with conditions established by this permit on the 1st Tuesday of every calendar month, unless otherwise approved by this Department. Additional monitoring, as necessary to meet the frequency requirements of this permit (Part I.A. Effluent Limitations and Monitoring Requirements) shall be performed by the permittee. The permittee shall notify the Department two (2) weeks prior to any changes in the monitoring schedule

8. Unless authorized elsewhere in this permit, the permittee shall meet the following requirements concerning maintenance chemicals for the following waste streams:

once-through non-contact cooling water, recirculated cooling water, boiler blowdown, cooling tower blowdown, and air washer water. Maintenance chemicals shall be defined as any man-induced additives to the above-referenced waste streams. This includes materials added for corrosion inhibition including zinc, chromium, and phosphorus.

a. The discharge, in detectable amounts, of any of the one hundred and twenty-six priority pollutants is prohibited, if the pollutants are present due to the use of j maintenance chemicals. 1

b. Slimicides, algicides and biocides shall be used in accordance with registration  ;

requirements of the FederalInsecticide, Fungicide and Rodenticide Act. l

c. The use of maintenance chemicals containing bis (tributyltin) oxide is prohibited j unless written approval is obtained from SCDHEC. .

d. Any maintenance chemicals added to the above referenced waste streams must degrade rapidly, either due to hydrolytic decomposition or biodegradation. )

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e. The discharge of maintenance chemicals added to waste streams must be limited to concentrations which protect indigenous aquatic populations in the receiving ,

stream and shall not exceed the "no observed effect level (NOEL)".  !

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Part 111 Page 22 of 24 Permit No. SC0004278 The permittee shall keep sufficient documentation on-site which support that the above requirements are being met. The information shall be made available for on-site review by Department personnel dudng normal working hours. The occurrence of in-stream problems may necessitate the submittal of chemical additive ~ data and may require a permit modification to include additional monitoring and limitations.

The permittee may demonstrate compliance with these limitations to the South Carolina Department of Health and Environmental Control by either sampling and analyzing for the pollutants in the discharge,providing mass balance calculations to demonstrate that use of particular maintenance chemicals will not result in detectable amounts of the toxic pollutants in the discharge, or by using the toxicity testing already required in the permit.

9. The company shall notify the South Carolina Department of Health and Environmental Control in writing no later than sixty (60) days prior to instituting use of any additional maintenance chemicals in the cooling water system. Such notification shall include:

- Name and general composition of the maintenance chemical

- Quantities to be used

- Frequency of use .

- Proposed discharge concentration

- EPA registration number,if applicable

- Aquatic toxicity information -

10. All sludges, waste oil and solid and hazardous waste shall be properly disposed of in accordance with the rules and regulations of the Bureau of Solid and Hazardous Waste Management.

11. The South Carolina Department of Health and Environmental Control has determined that pursuant to Section 316(a) of the Act that the thermal component of the discharge controlled by the temperature criteria on page 2_of this permit assures the protection and propagation of a balanced, indigenous population of fish, shellfish, and wildlife

12. Neither free available oxidant nor total residual oxidant may be discharged from any unit for more than two hours in any one day, and not more than one unit in any plant may discharge free available or total residual oxidant at any one time unless the Permittee can demonstrate to SCDHEC that the units in a particular location cannot operate at or below this level of treatment. .

13. (a) On a quarterly basis, a three-brood chronic toxicity test shall be conducted using a control and the instream waste concentration (IWC) of 100 % at Outfalls 001 and 002. The test shall be conducted using Ceriodanhnia dubia as the test organism and

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Part III Page 23 of 24 Permit No. sC0004278 in accordance with the most recent "Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms" (EPA /600/5-89/01) and " South Carolina Procedures for Pass / Fail Modifications of the Ceriodaphnia 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> Acute Toxicity Test and Ceriodaphnia Survival and l Reproduction Test" (SCDHEC, May 1989), or test protocol approve d~ by the department. The raw data and results shall be submitted in accordance with Pan I.(C)(3) of the permit for each test. The test must be performed by a SCDHEC certified laboratory.

(b) Test results shall be analyzed according to statistical methods in Section 12.13 in USEPA (1989) or the most recent edition of this document. The toxicity test shall be deemed a failure if survival and/or reproduction of the test group is lower than

, that of the control group and this difference is significant at the a - 0.05 level.

(c) The permittee must indicate on the discharge monitoring report forms whether the test passes or fails. If the test fails, the number "1" shall be placed on the form,if the test passes, the number "0" shall be placed on the form. Invalid tests will be reported with the letter "I" and resampling will occur as directed by the Department.

14. The permittee shall commence all toxicity testing consistent with conditions I i

i established by this permit during the first two (2) weeks of every quarter, unless otherwise approved by this Department.

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15. Multiple grabs shall consist of grab samples collected at the approximate'begmnmg j of the period of Total Residual Oxidant and/or Free Available Oxidant discharge and once every twenty (20) minutes until TRO or FAO is no longer present. ,

16. The permittee shall maintain at the permitted facility a record of the method (s) used in measuring the discharge flow:

a) Estimate - Pump Curve Valve Opening Production Chart Tank Volume Water Use Records b) Instantaneous - Bucket and Watch Weir and Gauge '

Parshall Flume c) Continuous - Totalizer Continuous Chart Recorder l

. .. _ _ _ . _ _ _ . _ _ __ _____._.______. J

'. j Part Ill Page 24 of 24 I Perenit No. sC0004278 i Records of any necessary calibrations must also be kept. This information shall be made available for on-site review by Department personnel during normal working hours. i

17. The applicable effluent limitation derived for total residual oxidant (TRO) shall be based on EPA Water Quality Criteria for total residual chlorine (TRC),which is 11.0 ppb average and 19.0 ppb maximum. The State's current lower limit of

^ detection for TRC is 0.1 ppm. The wastewater must be analyzed to the lowest method detection limit achievable by a South Carolina certified laboratory which the permitte chooses to use. If the method detection limit of the certified laboratory is less than 0.1 ppm, then the limit for TRO will be the method detection limit. Should the method detection limit achieve 11.0 ppb or below, then the water quality limits of 11.0 ppb average and 19.0 ppb maximum shall apply.

18. Intake screen wash water, pump strainer backwash water, fire protection water, and potable water systems may be discharged without limitations or monitoring requirements. Appropriate measures shall be taken to minimize any impact to the environmental.

19. The permittee shall not store coal, soil nor other similar erodible materials in a manner in which runoff is uncontrolled, nor conduct construction activities in a manner which produces uncontrolled runoff unless such uncontrolled runoff has been specifically approved by SCDHEC. " Uncontrolled" shall mean without sedimentation basin or other controls approved by SCDHEC.

20. Upset - (1) Definition. " Upset" means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

21. The once through noncoritact cooling water system may be drained without limitations or monitoring requirements for maintenance activities provided that the Catawba Nuclear Station takes proper measures to minimize environmental impact from this activity.

22. The permittee shall monitor the groundwater around the chemical treatment ponds in accordance with the approved ' Groundwater Monitoring Plan'.

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South Carolina Department of Health

• s and Environmental Control ,

Water Pollution Control PERMIT TO DISCHARGE WASTEWATER IN ACCORDANCE WITH THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

' THIS CERTIFIES THAT s

Duke Power Company s L

Catawba Nuclear Station has been granted permission to discharge wastewater from a facility located at Newport, York County, South Carolina 9

to. receiving waters named Lake Wylie 5 i

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in accordance with effluent limitations, monitoring requirements and other conditions set forth in Parts 1,11, and 111 hereof. This permit is issued in accordance with the provisions of the Pollution Control Act of South Carolina (S.C. Code Sections48-110 et seq.,1976) and with the provisions of the Federal Clean Water Act (PL 92 500), as amended. 33 U.S.C.1251 et seq., the "Act."

f/ Marion hoeF. Sadler, Jr.f DIRECTOR. DIVISION OF INDUSTRIAL & AGRICULTURAL WASTEWATER BUREAU OF WATER POLLUTION CONTROL l

Issued: SEP 1 L 19 9 2 Expires:

j SEP 30 1 997 L .

Effective: OCT 1 1992 Permit No.: SC0004278

g Y A. EFFLUENT LIMIT TIONS AND MONITORING REQUIREMENTS Phase C [ -

1. During the per od beginning on the effective date of this permit and lasting throtI[h April 30, 1994,/the Permittee is authorized to\dischar ohng-watem-nuclear service water, cooling tower blohown (ge from outfall(s) discharged serial number via internal Outfall (s) 005)001:and once through liquid rad' ogical wastes (treated and discharged via internal Outfal 004) to Lake Wylie. .

Such discharge shall be'xlimited and monitored by the Permittee as s cified below:

EFFLUENT CHARACTERISTICS 's DISCHARGE LIMITAT NS MONITORING RE0VIREMENTS kg/ day (lbs/ day) Oth9 f' Units (Specify)

\ Monthly Daily Horfthly Daily Measurement Sample Averace Max. (verace Max. Freouency Type Flow-m3/ day (MGD) - -

MR MR Daily Continuous **

Total Residual Chlorine -

N -

MR MR 1/ week Multiple Grabs

• Intake Temperature - - -

Daily Continuous Discharge Temperature -

'y Daily Continuous Temperature rise (April-September) - -

5.6*C(10.0*F) -

Daily [alculation Temperature rise (October-March) - -

7.8*C(14.0*F) Daily Calculation

• See Part III, Special Condi on #16 MR - Mbnitor and Report

• • See Part III, Special Cond(tion #17 Based on'as flow of 82.5 MGD s

No chromium and zinc ba d maintenance chemicals will be allowed in t e cooling tower.

2. The pH shall be m ored and repurted once per week by grab sample.

3.

There shall be no discharge of floating solids or' visible foam in other than \ race amounts; nof, shall 225 the effluent ause a visible sheen on the receiving waters. @,$ 4

4. am-Samples taken in compliance with the monitoring requirements specified above shall\be taken at the =o following location (s): The intake temperature shall be monitored at or near the plant intake. All P' other parameters shall be monitored at or near the point of discharge from Outfall 001 prior to mu mixing with the receiving waters, unless otherwise specified above. 8" 8

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EFFLUENT LIMITATIONS AND MONITORING REQUIREM EN a .c .F-t

1. During the period beginning on " Neck ^d kWw ^

to discharge from outfall(s) serial number (s) 001:4 1, J 4 and lasting through the expiration date, the Permittee is authorized once through cooling water, nuclear service water, cooling tower blowdown (discharged via Outfall 004) to Lake Wylie. internal Outfall 005) and liquid radiological wastes (treated and discharged via internal i

Such discharge shall be liiiiiteri and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Month.ly Daily Heasurement Sample Averace Max. Averace itax , Frecuency Tvoe Flow-m3/ day (MGD) - -

MR HR Daily Continuous ***

WTotal Residual C-h4cri-ne Alk -

less than 0.10 mg/l CD Multiple Grabs M 1/ week Intake Temperature - - - -

Daily Continuous DischarkeTemperature Daily "

N.4ci 4 3 up/4 cio(*JcD ror ee.ntinuous Co Temperature rise (April-September) - -5.6 4 ;G.C"i) .c.u rro."c e-Daily Crlculation Tem rature rise (October-March) - -

-7.0'CD4.0"T) -

Daily Calculation N ee.].$,sd MonoMaN9 Part III, Special Condition M/S MR - Monitor and Report l USSee Part III, Special Condition R77 (a Based on a flow of 82.5 NGD U ee P rt III, Special Condition M/ 7

( 04 %S% own dM 4 C tochromiuma&ndzinc ased maintenance chemicals will be allowed Mf& Y ?9V/S/CM.S in the cooling tower. yyg

2. The pH shall be monitored and reported once per week by grab sample. gex

' " l aw-3.

There shall be no discharge of floating solids or visible foam in other than trace amounts; nor,, shall fI the effluent cause a visible sheen on the receiving waters. u

4. W

Samples followingtaken in compliance with the monitoring requirements specified above shall be taken at.the locatio'n(s): The intake temperature shall. be monitored at or near the plant intake. All $

other parameters shall be monitored at or near the point of discharge from Outfall 001 prior to e mixing with the receiving waters, unless othentise'specified above. y

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4" A A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the perio beginning on the effective date of this Permit and lasting (See Pa.rt 111, Special Condition #.14) the ermittee is authorized to discharge from outfall(s) ser'lal number (s) 001: once through cooling water, nuclear servi e water, cooling tower blowdown (discharged via in (rnal Outfall 005) and liquid radiological wastes (treated and d charged via internal Outfall 004) to Lake Wyli .

Such discharge shall be 1 ited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITA NS

' MONITORING RE0UIREMENTS day (lbs/ day) Othef Units (Specify) '-

Mont Daily Moffthly Daily Measurement Sample Averaa Maximum dveraae Maximum Freouency Type Biological Monitoring - - -

MR") ("

(Whole Effluent Chronic 1/ month'"

Toxicity Testing) ,'

(1) See Part Ill, Special Condition , b,c,d,e MR = Monitor and Report

! \

2. Samples taken in compliance with the monitoring requirements spect-ied above shall be taken at the following

, location (s): at the point d'f discharge from Outfall 001 prior to mi ing with the receiving waters, unless l otherwise specified above.7

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. EFFLUEllT LIF ITATIONS AtlD MONITORIllG REQUIREMENTS

l. During th e period beginning on(See Part III, Special Condition #14) of this Permit ap sting through the expiration date, the 0 01 : once through cooling water, Permittee nuclear s ervice water, is cooling authorized towertoblowdown discharge(discharged from cutfall(s) viaserial number internal Outfall(s)605) and liquid radiological wast'es (treated and discharged via hternal Outfall 004) to Lake Wylie.

Such disc harge shall be limited nd monitored by the Permittee as speci ed below:

EFFLUENT CitARACTERISTICS DISCHARGE LIMITATIONS / MONITORING REQUIREMENTS kg/d (lbs/ day) Other Units'(Specify)

Monthly Daily Monthlyf Daily Measurement Sample Average Maximum Averaae Maximum Freauency Tvoe Biological Monitoring - -

[- Om 1/ quarter Grab (Whole Effluent Chronic Toxicity Testing) N

\ ..

(1) See Part III, Special Condition #13 o,trnife= -

.3 N ak (~1) a - Ty 2.-

N.2[ Samples taken in compliance with t-he monitoring requirements'spect(ied above shall be taken at the following location (s): at the point of d' charge from Outfall 001 prior to m1xing with the receiving waters, unless' otherwise specified above.

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A. ~'

EFFlutHT LIMITATIONS AND MONITORING REQUIREMENTS Phase p' '

l. During the period beginning on the effective date of this permit and ng thr ugh 30, the ' '

Permittee is authorized to discharge from outfall(s) serial number (s) 002: lo volbme-was.tes.cmiscellaneous dilute wastewater, .d metal cleaning wastes to take Wylie.

Such discharge shall be imited and monitored by the Permittee as specif d below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING RE0VIREMENTS kg/ day (lbs/ day) Other Units . peci fy)

Qonthly Daily Monthly Daily Measurement Sample A9erace Maximum Averace Maximum Frecuency TYDe Flow-m3/ day'(MGD) -

MR MR 1/ week Instantaneous

• Total Residual Chlorine (TRC) - -

les than 0.10 mg/l 1/ Grab Biochemical Oxygen Demand (5-day) - -

M MR Oil and Grease 15[mg/l 1/No' nth Grab 20 mg/l 2/ month Grab Total Suspended Solids -

\\ -

6 mg/l 100 mg/l Copper, total - 2/ month Grab 1.0 mg/l 1.0 mg/l 1/g3 Grab Iron, total Ethylene Glycol h-\ 1.0 mg/l 11.9 mg/l 1.0 mg/l 23.8 mg/l 1/g3 1/g3 Grab Grab Hydrazine -

'/ 0.43 mg/l 1/g3 Grab .

(1)

\

Sampling shall be conducted once per occurrenc[of dishharge of these substances through Outfall 002 but need not be more than twice per month.

(2) Sampling shall be conducted once per chemi 1 metal clea\

Outfall 002 but need not be more than twl e per month. ning\ occurrence of discharge of these substances through (3) After treatment with hypochlorite has o urred in a WC pond, simpling for TRC shall be conducted once per day over a two day period during discharg from,.the WC pond.

\

• See Part Ill, Special Condition # B Based on a fikof 0.76 MGD MR - Monitor and' Report

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2. The pH shall not be less than \

.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week

?m-by grab sample. =o

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3. There shall be no discharge of floating solids or visible foam in other than tra amounts; nor, shall the [

effluent cause a visible sheen on the receiving waters. g

4. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following 5-location (s):

mixing with theatreceiving the point waters.

of discharge from the conventional waste treatment (WC) system but prior to .

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_ _ _ , , __ __ _, --- , u +-w-*

A. EFFLUENT LIMITATIONS AND MONITORING EME .+unc ,,

1. During the period beginning on my 1,-1994 of this permit and lasting through the expiration date, the Permittee is authorized to discharge from outfall(s) serial number (s) 002: low volume wastes, miscellaneous dilute wastewater, and metal cleaning wastes to Lake Wylie.

~

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING RE0VIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averaoe Maximum Averace Maximum Freouency Tvoe Flow-m3/ day (MGD) g h d - -

MR MR 1/ week Instantaneous oTotal Residual % hrrtne (TRC) - -

less than 0.10 mg/l Grab Biochemical Oxygen Demand (5-day) - -

MR MR 1/

1/No' nth Grab Oil and Grease - -

15 mg/l 20 mg/l 2/ month Grab Total Suspended Solids - -

30 mg/l 100 mg/l 2/ month Grab Copper, total - -

0.0125 mg/l 0.0125 mg/l Grab 1/a3 Iron, total - -

0.645 mg/l 0.645 mg/l 1/u3 Grab E ny b c C 4 ui -

'a "- " -"

cnA Hydrazine - - -

g/l 1/g3 Grab e I e whorsq ~ ~

AN b*

(1) Sampling shall be conducted once per occurrence of discharge of these substances through Outfall 002 but need not be more than twice per month.

(2) Sampling shall be conducted once per chemical metal cleaning occurrence of discharge of these substances through.

Outfall 002 but need not be more than twice per month.

(3) After treatment with hypochlorite has occurred in a WC pond, sampling for TRC shall be conducted once per day over a two day period during discharge from the WC pond.

• See Part III, Special Condition #pf/7 Based on a flow of MGD 2Js MR - Monitor and Report at E

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2. The pH shall not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week 2o by grab sample. .

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3. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the 9 effluent cause a visible sheen on the receiving waters. , 8

4. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following s location (s): at the point of discharge from the conventional waste treatment (WC) system but prior to mixing with the receiving waters.

F. MM #/ 8 Arc # d5 d^94- b d o IOp e d e > b j.

A.

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS De a w) ,-

1. During Conditionthe#1period beginning on the effective date of this Permit and lasting through (See Part III, Special wastes, miscell the Permittee is authorized to discharge from outfall(s) serial number (s) 002: low volume aus dilute wastewater, and metal cleaning w es to Lake Wylie. '

Such discharge shall limited and monitored by the permi ' tee as specified below:

EFFLUENT CHARACTERISTICS -

DISCHARGE, LIMITATIONS MONITORING RE0VIREMENTS kg/ day (lbs/ day) . Other Units (Specify) qnthly Daily Monthly Daily Measurement Sample

• Avbraae Maximum Averaae Maximum Freouency TYDe

/

Biological Monitoring - -

MR") "'

(Whole Effluent Chronic '[ 1/ month")

Toxicity Testing) .

/ [~.. v , ,'A L (1) See Part III, Special Condition #13 a,b,c,d,e -

MR = Monitor and Report

/ -

g g putos P '

~

2[Due to the intermittent and variable duration of the batch discharges fo Outfall 002, the sampling protocol for chronic testing /is modified to allow Duke Power Company to conduct th chronic testing with only one or two samples in instances when flow is not available.

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3. Samples taken/fn compliance with the monitoring requirements specified above sha - be taken at the following ili E location (s): at the point of discharge from the conventional waste treatment (WC) stem but prior to #m-mixing with the receiving waters.

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,. EFFLUENT LlHITATIONS AND MONITORING REQUIREMENTS

l. During the period begin ing on (See Part III, Special Condition #14)of this Pe t and lasting through the expiration date the Perm tee is authorized to discharge from outfall(s) serip number (s) h02: low volume '

wastes, miscellaneous dilu e wastewater, and metal cleaning wastes to Lake flie.

Such discharge shall be limit d and monitored by the permittee as specifi d below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING RE0VIREMENTS

- kg ay (lbs/ day) Other Units (S ecify)

Honth Daily Monthly Daily Measurement Sample Average Maximum Averaae Maximum Frecuency Tvoe Biological Monitoring - - -

0'" 1/ quarter Grab (Whole Effluent Chronic Toxicity Testing)

/

/

/

/ -

(1) See Part III, Special Condition #13 6 [ -

Mcde -I De) h \jio 6 h ue to the intermittent and variable' duration of the batch dischqrges for Outfall 002, the sampling protocol for chronic testing is modified to' allow Duke Power Company to coh uct the chronic testing with only one or twosamplesininstanceswhenJ1'owisnotavailabl,e.

3.Samplestakenincompliancediththemonitoringrequirementsspecified bove shall be taken at the following location (s): at the poi of discharge from the ' conventional waste trea ent (WC) system but. prior to mixing yy with the receiving wat s. ge.

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A.

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS If _..

1. During the period beginning on the effective date of this permit and lasting through' April 30, 1994, the Permittee

is authorized to d charge from outfall(s) serial number (s) 003: treated sanitary sewerage _to lake Wylie.

Such discharge shall b limited and monitored by the Permittee as specified below: '

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

(onthly Daily Monthly Daily Measurement Sample A k race' Maximum Averaae Maxim m Frecuency Tvoe Flow-m3/ day (MGD) - -

MR MR 1/ month Instantaneous

• Total Residual Chlorine - -

MR MR 1/ week Grab Total Suspended Solids -

90mg/)/ 135 mg/l 1/ month 24Hr. Composit'e Biochemical Oxygen Demand (5-day) - -

30 g/l 60 mg/l 1/ month 24Hr. Composite Fecal Coliform - -

,2 0/100 ml

, 400/100ml 1/ month Grab Dissolved Oxygen - -

M MR 1/ week Grab oSee Part III, Special Condition #17

! MR = Monitor and Report Based on a flow of 0.038 MGD

2. The pH shall not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall b onitored once per week by grab sample.

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3. There shall be no discharg of floating solids or visible foam in other than trace a unts; nor, shall the  %--

effluent cause a visible been on the receiving waters.

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4. Samples taken in comp iance with the monitoring requirements specified above shall be take at the following location (s): at the point of discharge from the sewage ~ treatment plant prior to m xing vi w with the receiving waters. 8~

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A, EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Ii -

1. During the period beginning ongec. Age.garmd Mb2Lc

_ay-b M94 of this permit and lasting through the expiration date, the Permittee -

is authorized to discharge from outfall(s) serial number (s) 003: treated sanitary sewerage to Lake Wylie.

Such discharge shall be limited and monitored by the Permittee as specified below: -

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averaae Maximum Averaae Maximum Frecuency Tvoe Flow-m3/ day, (MGO) - -

MR MR 1/ month Instantaneous

• Total Residual Chlorine - -

0.5 mg/l 1.0 mg/l 1/ week Grab Total Suspended Solids - -

90 mg/l 135 mg/l 1/ month 24Hr. Composite 4

Biochemical Oxygen Demand (5-day) - ,- 30 mg/l 60 mg/l 1/ month 24Hr. Composite Fecal Coliform - -

200/100 ml 400/100ml Grab 1/ month Dissolved Oxygen - -

at a minimum of 1.0 mg/l Grab 1/ week oSee Part III, Special Condition 8PTl4, MR = Monitor and Report Based on a flow of.0:038 MGD o.03 (

2. The pH shall not be less than 6.0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week by grab sample, yj ame

3. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the  ;--

effluent cause a visible sheen on the receiving waters.

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4. Samples taken in compliance with the monitoring refuirements l specified above shall be taken at the ww following location (s): at the point of discharge from the sewage treatment plant prior to mixing with the receiving waters. 8~

g m

'A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the Permittee ~ >

is authorized to discharge from outfall(s) serial number (s) 004: liquid radiological wastes'via Outfall 001 to Lake Wylie.

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS kg/ day (lbs/ day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averaae Maximum Averace Maximum Freauency Tvoe Flow-m3/ day (MGD) - -

MR HR 1/c33 Estimate * <

Copper, total 1.0 mg/l 1.0 mg/l 1/c33 Grab Iron, total - -

1.0 mg/l 1.0 mg/l 1/g33 - Grab I Hydrazine - -

46.8 mg/l Grab 1/g33 oSee Part III, Special Condition U.7 /(, MR = Monitor and Report

~

Based on a flow of-0-007.-MGD

()* 009 (1) Sampling shall be conducted once per occurrence of discharge of this substances through Outfall 004.

2. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following 225 location (s): at the point of discharge from the liquid radiological waste treatment plant but prior to 3%E mixing with other wastewaters at Outfall 001.  %--

This discharge is regulated by the Nuclear Regulatory Commission (NRC) and is monitored per their -

specifications and the results are reported to NRC. -

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.- - - - - . , . - ~,m - .-- -. - - - , . .w-.,...-e- ,, - , . - , .- -..~,.-.,..-,,-.m- - - . - , -

l .

r A.

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS l

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from outfall(s) serial number (s)005: cooling tower blowdown via Outfall 001 to Lake Wylie.

l Such discharge shall be limited and monitored by the Permittee as specified below: '

l EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS kg/ day (lbs/ day) MONITORING REQUIREMENTS Other. Units (Specify)

Monthly Daily Monthly Daily Measurement Sample Averace Maximum Averace Maximum Freouency Tvoe Flow-m3/ day (MGD) - -

, MR MR Weekly Estimate **

Free Available Ctrluane 1 - -

0.2 mg/l 0.5 mg/l ewder 1/ week Multiple Grabs *

• See Part 111, Special Condition He* ' I o*See Part III, Special Condition Hf'/(e-MR = Monitor and Report No chromium and zinc based maintenance chemicals will be allowed in the cooling tower. -

7 The -Permi-t+ee--she4-1-annual 1, througli munitur ing-or-engineeiing uhlet4one-cert-tfy-that-4he-ot-her-144 peiei4y N'_as--a-J-pcilutaub (unides chromium-and-z4cc) are preent at-ne ddact a rt:ul t s f -the-add +t-ion-of-ecel ing-tewep-ma4ntenanca- eha="1 s.

P_,d by The pHsample.

grab shall not be less than 6 0 s.u. nor greater than 9.0 s.u. and shall be monitored once per week E2D f & Samples A location taken (s): in compliance with the monitoring requirements specified above shall be taken at the following 3% E at the point of discharge from the cooling towers prior to mixing with wastewaters at Outfall 001. Q

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.I PART I Page 14 of 31 Permit No. SC0004278

8. SCHEDULE OF COMPLIANCE .

1.

Sc " . ..o uieeesifil1 Lne-ditchag in ocnieve compilance witn tne ett t uent limita'tions specifief accordance "ith the fa44ewitig schedule:

(A) nn ar bafnro .lanunry 1,1993, Lhe permittee snail submit a Prelimina77-Enyineusing Repcit (PE-R) fc. i e i e,, oid appeuvai wisicii addr esses cue trestmer.: facilitice--limitation:-en 49 : 2, 7, 2nd-H-of--t-hi s :r-; t.

( B )-On---c r=beforemhmuar-y-3-1, 1903 , ihe permittee shall submit supptemenee4

-?!6(2) i r.fsrat ar- r.d predictive-mode.1-pedh_

(C) Or er befer May-!, 1902, the-pc.m Liee snail submit a Final rng 4 m. ;c ,ng nep - a ( fi a,; pi 4,,3, 3peu , ric.,,yr,s.-and = ennetruction app!"tinn) for the b ea Lumni iou;;itic: prepc: d - the """, for -adew a nri acor-evet ,

p3 nn nr be f;. a. May 1, iss+ , tne c r e 4 L ..ei.L-44c i' 4 + 4 a"aa- + - -+ 4 an eh=11 b; w..giui d and Mc efq uant shall bn in ecmpi ionce witn tne i imiiotions c pag c 2, 7, ;..J 11 vi tric pesmit.

N1o I than 14 calendar days following a date ide,n.t.i.f n teddhe above schedule o com 3 or, in the case of specthe'ePermittee -a ion shall subraibeither a report of progress written notice of complia ce-or'n .ceingTquired Qm liance.

by identified dates, a In the latter case, the notice shall i e cause of non compri'anee n remedial actions taken, i an be ity of meeting the next scheduled re -

1 PART I Page 15 of 31 Permit No. SC0004278 i

C. MONITORING AND REPORTING ,

,1. Representative Sampling  !

Samples and measurements taken as required herein shall be ,

representative of the volume and nature of the monitored discharge.

2.- Flow Measurements '

Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be present and used to insure the accuracy and reliability of measurements of the volume of monitored discharges. The devices shall be installed, calibrated and maintained to insure that the accuracy of the measurements are i consistent with the accepted capability of that type of device.

Devices selected shall be capable of measuring flows with a maximum deviation of less than 110% from the true discharge rates throughout the range of expected discharge volumes.

The primary . ;

flow device must be accessible to the use of a continuous flow recorder. Where a fiume is present, a separate stilling well for Department / EPA use must be provided if required by the Department.

3. Reporting Monitoring Results Monitoring results obtained each month shall be reported monthly on a Discharge Monitoring Report Form (EPA Form 3320-1). The first report is due postmarked no later than the 28th day of the month following the month this permit becomes effective. Two copies of these, and all other reports required herein, shall be submitted to the Department: ,

i S.C. Department of Health and Environmental Control '

ATTN: BWPC/ Enforcement Section 2600 Bull Street l Columbia, South Carolina 29201 i

4. Test Procedures Test procedures for the analysis of pollutants shall conform to regulations published pursuant to State Environmental 1.aboratory Certification Regulation 61-81 and Section 304(h) of the Act, as amended. (Federal Register, October 16, 1973: Title 40, Chapter I, Sub-chapter D, Part 136 " Guidelines Establishing Test Procedures for the Analysis of Pollutants." Amended by Federal Register, 1,  !

December 1976, and any other amendments that may be '

' ~

%fRecording ofUr*V) a OMM or~P W*NS pcNC* Y *b l S. Results k For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall record the ,

information: following '

PART I  !

Page -16 of 31' >

Permit No. SC0004278 i

a. the exact place,. date and time of sampling;

b. the dates and times the analyses were perfomed; , ,

c,. the person (s) who perfomed the analyses and the laboratory cer-L tification number where applicable;  ;

d. the analytical techniques or methods used; and i s t

e. the results of all required analyses.

6. Additional Monitoring by Permittee ,

If the pemittee monitors any pollutant at the location (s) designated l

herein more frequently than required by this. permit, using approved analytical methods as specified herein, the results of such. monitoring  ;

shall be included in the calculation and reporting of the values required  :

in the Discharge lionitoring Report Form (EPA-3320-1). Such increased fre-quency shall also be indicated. Additional or accelerated monitoring may be required to determine the nature and impact of a non-complying dis-charge on the environment or to determine if a single non-complyin sample is representative of the long term condition (monthly average)g . i

7. Records Retention All records and information resulting 'from the monitoring < activities required by this permit including all records of analysis psrformed and

• calibration and maintenance of instrumentation and recordings from con- '

tinuous monitoring instrumentation shall be retained for a minimum of i three (3) years, or longer if requested by the Department. The permittee '

shall furnish to the Department upon reouest, copies of records required to be kept by this pemit.  !

8. Defini tions

a. The " monthly average", other than for fecal coliform, is the arith- \

metic mean of all samples collected in a calendar month period. The monthly average for fecal coliform bacteria is the geometric mean of all samples collected in a calendar month period.

The monthly average loading is the arithmetic average of all individual loading determinations made during the month.

,i

b. The " weekly average" is the arithmetic mean of all the samples collected during a one-week period. For self-monitoring pur-' >

poses, weekly periods in a calendar month are defined as three consecutive, seven day intervals starting with the first day of the calendar month and a fourth interval containing seven days o plus those days beyond the 28th day in a calendar month. The value to be reported is the. single highest of the four weekly l

PART I Page 17 of 31 Permit No. SC0004278 i

averages computed during a calendar month.

s The weekly average loading is the arithmetic average of all individual loading deter-minations made during the week.

i

c. i The " daily maximum" is the highest average value recorded of samples cc!1ected on any single day during the calendar month.

d. The " instantaneous maximum" I sample collected during the calendar month.is the highest value recorded of any

e. Arithmetic Mean: The arithmetic mean of any set of values is the summation vidual values.

of the individual values divided by the number of indi-

f. Geometric Mean: The geometric mean of any set of values is the Nth root of the product of the individual values where N is equal to the number of individual values. The geometric mean is equivalent to the antilog of the arithmetic mean of the logarithms of the indi- ,

vidual values. For purposes of calculating the geometric mean,  !

values of zero (0) shall be considered to be one (1).

g. Department:

mental Control,The South Carolina Department of Health and Environ-

h. Act: The Clean Water Act (Fomerly referred to as the Federal Water Pollution' Control Act) Public Law 92-500, as amended.<

i. Grab Sample:

An individual discrete or single influent or effluent portion of at least 100 milliliters collected at a time representa-tive of the discharge and over a period not exceeding 15 minutes and retained separately for analysis.

Instantaneous flow measured at

' the time tity. of grab sample collection shall be used to calculate quan-

j. Composite Sample:

One of the following four types of composite samples as defined is specified within this permit:

(1) An influent or effluent portion collected continuously over a specified period of time at a rate proportional to the flow.

(2) A combination of not less than 8 influent or effluent grab samples collected at regular (equal) intervals over a specified period of time, properly preserved, (See part I.C.4.) and composited by increasing the volume of each aliquot in propor-tion to flow.

If continuous flow measurement is not used to composite us'ed:

in proport_ ion to flow, the following method will be sample Take an instantaneous flow measurement each time a grab is collected. At the end of the sampling period, sum the instantaneous determine flow measurements to obtain a total flow to th'e partial amount (percentage) of each grab sample to be combined to obtain the composite sample.

PART I Page 18 of 31 Permit No.SC0004278 (3) A combination of not less than 8 influent or' effluent grab samples of equal volume,*but at variable time intervals that'are i inversely proportional to the volume of the flow.s That is, the time interval between aliquots is reduced as the volume of flow

, increases.

(4) A combination of not less than. 8 influent or effluent grab samples of constant (equal) volume collected at regular (equal) time intervals over a specified period of time, while being properly preserved.

Continuous flow or the sum of instantaneous flows measured and averaged for the specified compositing time ' period shall be used with composite sample results to calculate quantity.

9. Right of Entry The pemittee shall allow the Commissioner of the Department ~of Health

• and Envirornental Control, the Regional Administrator of EPA, and/or their authorized representatives:

a. To enter upon the permittee's premises where a regulated facility or activity and effluent source is located in which any records are required to be kept under the terms and conditions of this pemit, and, ',

b. .

At reasonable times to have access to and copy any records required to be kept under the terms and conditions of this pemit; to inspect  !

any facilities, equipment (including monitoring and control equip-men t) , practices or operations regulated or required under this pemit and. sample or monitor any substances or parameters at any location for the purposes of assuring pemit compliance.

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PART II Page 19 of 31 Pemit No. SC0004278 A. GENERAL REQUIREMENTS

1. Outy to Comply The permittee must comply with all conditions of this pemit. Any permit non-compliance constitutes a violation of the Act and the S.C. Pollution Control Act and is grounds for enforcement action; for permit termina-tion, revocation and reissuance, or modification; or for the denial of a permit renewal application.

2. Civil and Criminal Liability

a. Any person who violates a term, condition or schedule of compliance contained within this pemit is subject to the actions defined by Sections 48-1-320 and 48-1-330 of the S.C. Pollution Control Act.

b. Except as provided in pemit conditions on " Bypassing" (Part II, C.2.), nothing in this pemit shall be construed to relieve the permittee from civil or criminal penalties for non-compliance,

c. It shall not be an acceptable defense of the pemittee' in an en-forcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit.

d. It is the responsibility of the permittee to have a treatment j

facility permi t.

that will meet the final effluent limitations ,of this The approval of plans and specifications by 'the Department does not relieve the permittee of responsibility for compliance.

3. Oil and Hazardous Substance Liability Nothing in this' permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to under Section 311 of the Act, the S.C. Pollution Control Act or appli-cable provisions of the S.C. Hazardous Waste Management Act and the S.C.

Oil and Gas Act.

4 Pennit Modification

a. The permittee shall furnish to the Department within a reasonable time any relevant information which the Department may request to detemine whether cause exists for modifying, revoking and reis-suing, or terminating the permit, or to detemine compliance with the permit.

b. Upon sufficient cause, this permit may be modified, revoked, re-issued, or terminated during its tem, after public notice and opportunity for a hearing. Modifications deemed to be minor will not require public notice.

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m. . .. 1 PART II Page 20 _ of 31.

Pemit No. SC0004278  :

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c. The filing of a request by the pennittee for a permit modification,.

or a notification of plannedschanges or anticipated non-compliance, does not' stay any pemit condition.

5. ,

Toxic Pollutants No twithstanding Part II.A.4. above, if a toxic effluent standard or i prohibition (including any schedule ,of compliance specified in such ~

effluent standard or prohibition) is established under Section 307(a) of the Act for a toxic pollutant which is present in the discharge and such  !

standard pollutant or prohibition is more stringent than any limitations for such in this. pemit, this pemit shall be revised or modified in accordance mittee with the toxic effluent standard or prohibition and the per-so notified.

6. State Laws 3 t

Nothing in this permit shall be construed to preclude the institution of any legal action ' or relieve the pemittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State law or regulation under authority preserved by Section 510 of the Act. ,

, 7. Property Rights The issuance of this pemit does not convey any property rights in either '

real or personal property, or any exclusive privileges.

authorize any injury to private property or any invasion, nor does it of personal rights, nor any infringement of Federal, State, or local laws or regu-

~1ations.  :

8. Severability The provisions of this permit are severable, and if any provisions of this pemit, or the application of any provision of this permit to any >

circums tances , is held invalid, the application of such provision to other circumstances, and the remainder. of this pemit' shall' not be' affected thereby. ,

9. Onshore and Offshore Construction This pemit does not authorize or approve the construction of any onshore or offshore physical waters.

structures or facilities or the undertaking of any work in any navigable I

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e PART II Page 21 of 31 Pemit No. SC0004278 B. REPORTING REQUIREMENTS ,

1. Change in Discharge i All discharges authorized herein shall be consistent with the tems and conditions of this pennit. The discharge of any pollutant identified in this pemit more frequently than or at a level in excess of that author-ized shall constitute a violation of the permit. Any planned facility expansions, production increases, or process modifications which will +

result in a new or different discharge of pollutants must be reported by i sutrnission of a new NPDES application or, if such changes will not vio- >

1 ate the effluent limitations specified in this pemit, by notice to the Department of such changes. Following such notice, the permit may be modified to specify and limit any pollutants not previously limited.

2. Twenty-Four Hour Non-Compliance Reporting-

a. The pennittee shall report any non-compliance with provisions speci-

' fied in this permit which may endanger public health or the environ-ment. The pennittee shall notify the Department orally within 24 -

hours of becoming aware of such conditions. During normal working hours call 803/734-5300. After hour reporting should be made to the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Emergency Response telephone number 803/253-6488, The  !

pennittee shall provide the following infonnation to 'the Department in writing, within five (5) days of becoming aware of such condi- i tions: .

1. A description of the discharge and cause of no~n-compliance; and, '

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2. The period of non-compliance, including exact dates and times; or, if not corrected, the anticipated time the non-compliance is expected to continue, and steps being taken to reduce, eliminate and prevent recurrence of the non-complying dis-charge.

b. The following violations shall be included in a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> report when they might endanger health or the environment:

1. An unanticipated bypass which exceeds any effluent limitation in this permit;

2. Any upset which exceeds any effluent limitation in the permit. j

c. As soon as the permittee has knowledge of or anticipates the need i j

for a bypass, but not later than 10 days before the date of the l bypass, it shall notify the Department and provide a determination l of the need for bypass as well as the anticipated quality, quantity, time of duration, and effect of the bypass.

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o PART II Page 22 of 31 Permit No. SC0004278

3. Other Non-Compliance t

The pemittee shall report in narrative form, all instanges of non-compliance not previously reported under Section B. Paragraph B.2., at

, the time Discharge Monitoring Reports are submitted. The reports shall contain the information listed in Paragraph B.2.a.

4. Transfer of Ownership or Control A permit may be transferred to another party under the following con-ditions :

a. The permittee notifies the Department of the proposed transfer at l east thirty (30) days in advance of the proposed transfer date;

b. A written agreement is _ submitted to the Department between _ the existing and new permittee containing a specific date for the trans-fer of permit responsibility, coverage, and liability for violations up to that date and thereafter.

Transfers are not effective if, within 30 days of receipt of proposal, the Department disagrees and notifies the current pemittee and the' new pennittee of the intent to modify, revoke and reissue, or teminate the permit and to require that a new application be filed.

5. Expiration of Permit ,

The permittee is not authorized to discharge after the. expiration date of.

this permit, unless a completed application for reissuance is submitted no later than 180 days prior to the expiration date. Permission may be granted to submit an application later than this, but not later than the expiration date of the permit. In accordance with Section 1-23-370 of the code of laws of South Carolina, if a timely and sufficient applica-tion is made for any activity of a continuing nature, the existing permit does not expire until a final detemination is made to renew or deny renewal of the existing pemit.

6. Signatory Requirements All applications, reports or infomation submitted to the Department shall be signed and certified.

a. All pemit applications shall be signed as follows:

1. For a corporation: by a principal executive officer of at least the l evel of vice-president or by a duly authorized representative;

2. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or,

PART II Page 23 ' of 31 Permit No. SC0004278

3. For a nunicipality, State, Federal or other public agency: by either a principal executive officer or ranking diected offi-cial,

b. All reports required by the pemit and other information requested by the Department shall be signed by a person described above or by duly authorized representation only if:

1. The authorization is made in writing by a person described above and submitted to the Department;

2. The authorization specifies either an individual or a position having responsibility for the overall operation of the regu-lated facility or activity, such as the position of plant manager, superintendent, or position of equivalent responsi-bility. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.)

7 '. Availability of Reports Except for data detennined to be confidential under Section 48-1-270 of the S.C. Pollution Control Act, all reports prepared in accordance with the terms and conditions of this permit shall be available for public inspection at the ' offices of the Department and the Regional Administra-tor. As required by the Act, effluent data shall not be considered confidential. Kndwingly making any false statement on any such report may result in the imposition of criminal penalties as provided for in Section 48-1-340 of the S.C. Pollution Control Act.

8. Changes in Discharges of Toxic Pollutants or Hazardous Substances

a. The permittee shall notify the Department as soon as it knows or has l reason to believe that any activity has occurred or will occur which would result in the discharge in any outfall of: -

1. Any toxic pollutant (s) identified under Section 307(a) of the Act which exceed the highest of the following concentrations l and are not limited in the pemit. '

1 mg/l for antimony (Sb);

0.500 mg/l for 2,4-dinitrophenol or 2-methyl , -4,6-dini-trophenol ;

. 0.200 mg/l for acrolein or acrylonitrile; 0.100 mg/l for any other toxic pollutant; or, Te.n (10) -times the maximum concentration value reported in the permit application. I

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PART II ,

. Page 24 of 31  !

, Pemit No.SC0004278 i

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2. Any hazardous substance (p) identified under Section 311 of-the I Act as detemined by Fedbral Regulation 40 CFR 117. }

b. The pemittee must notify the Department as soon as it knows or has

- reason to believe that it has begun or expects to begin to use or manufacture as an intemediate or final product or by-product any.

toxic pollutant or hazardous substance which was not reported in the permit application.

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PART 11 Page 25 of 31 Permit No. SC0004278 i C. ~0PERATION AND MAINTENANCE , i

1. Facilities Operation

- a. The pemittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appur-tenances) which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation' and maintenance includes effective performance based on design facility removals, adequate funding, adequate operator staffing and training, and adequate laboratory and process controls as determined by the laboratory certification program of the Departinent. This provision requires the operation of back-up or auxiliary facilities or similar systems only when necessary to achieve compliance with the condi-tions of the permit. Maintenance of facilities, which necessitates unavoidable interruption of operation and degradation of effluent quality shall be scheduled during non-critical water quality periods and carried out in a manner approved by the Department.

b. The pemittee snali. provide for an ~ operator, as certified by the Sou th Carolina Board of Certification for Environmental Systems Operators, with a grade equal to or hfgher than the classification designated in Part IIIA3. The name and grade of the operator of record 'shall be submitted to the Department prior ~ to placing the facility into operation. A roster of operators associated with the

• facility's operation and their certification grades, shall also be -

submitted with the name of the " operator-in-charge".' Any changes in operator or operators shall be submitted to the Department as 'they occur.

2. Bypassing Any intentional diversion from or bypass of waste streams from any por-tion of wastewater collection and treatment facilities which is not a designed or established operating mode for the facility is prohibited except (a) where unavoidable to prevent loss of life, personal injury or  ;

severe property damage, or (b) where excessive stom drainage or run-off ~

would damage any facilities necessary for compliance with the effluent limitations and prohibitions of this pemit and there were no feasible alternatives to the bypass, such as the use of auxiliary treatment facil-  !

ities or retention of untreated wastes. ' Severe property damage" does not mean economic loss caused by delays in production. ,

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3. Duty to Mitigate, Halt or Reduce Activity i The permittee shall take all reasonable steps to prevent, minimize or correct any' adverse impact on public health or the environment resulting l from non-compliance with this permit. Upon reduction, loss, or failure of the treatment facility, the pemittee shall, to the extent necessary to maintain compliance with this pemit, control production or all dis-charges or both until the facility is restored or an alternative method of treatment is provided.

PART II Page 26 of 31 Pennit No. SC0004278

4. Power Failures i In_ order to maintain compliance with the effluent limitations and prohi-bitions of this permit, the pennittee shall either: '

p ervAs d e '

a. 9.-::c;.donce U. une aheuuie ui Gump4 4anc; cuuedina C

gqNj  % provide an alternative power source sufficient to operate the

... " .rt wastewater control facilities; cc, 3 aid. terr >Hva oower snurca is not in existenca and na date-f.or-.

i t.H, p', s.en ia i . cn e s:.7 , ' n " . 71 ' . " . , . .. . s a f.e.. uf ,3peraden-wh4ch w44+:

b. Halt, reduce, or otherwise control production and/or all discharges upon the reduction, loss, or failure of the primary source of power to the wastewater control facilities.

5. Renoved Substances Solids, sludges, filter backwash or other residuals removed in the course of. treatment or control of wastewaters'shall be disposed of in a manner such as to prevent such materials from entering State waters and in accordance with guidelines issued pursuant to Section 405 of the Act, and the terms pennit of abyconstruction issued the Department. or NPOES and/or solid or hazaroous waste 4

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PART III Page 27 of 31 Permit No. SC0004278 PART Ill A. OTHER REQUIREMENTS

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1. i The Permittee shall maintain at the permitted facility a complete Operations l and Maintenance (0 & M) Manual for the waste treatment plant. The manual shall be made available for on-site review during normal working hours. The manual shall contain operation and maintenance instructions for all equipment and appurtenances associated with the waste treatment plant. The manual shall contain i a general description of the treatment process (es ,

characteristics that will produce maximum treatment efficiency, an)d correctiveoperating action to be taken should operating difficulties be encountered.

2.

The Permittee shall provide for the performance of routine daily treatment plant inspections by a certified operator of the appropriate grade as defined in Part II.C.1. The inspection shall include, but is not limited to, areas which require a visual observation to determine efficient operations and for which immediate corrective measures can be taken using the 0 & M manual as a guide. All inspections shall be recorded and shall include the date, time and name of the person making the inspection, corrective measures taken, and routine equipment maintenance', repair, or replacement performed. The Permittee shall as required by Part I.C 7., maintain all records of inspections at the permitted facility site review during normal working and the records shall be made available for on-hours.

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ONW s,f> +H--B in the Permits to Construct which are issued by the Departm P This classification corresponds to an operator with a Grade of-4-9 or higher.

4. (,-S hss ed The Permittee treatment plant and shall maintain anatallallweather appurtenances times. access road to the Gastewater

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5.

The Permittee shall continue to maintain a Best Management Practices (BMP) plan to identify and control the discharge of significant amounts of oils and the hazardcus and toxic substances listed in 40 CFR Part 117 and Tables 11 and III of Appendix potential 0 to 40 sources CFR Part of spills or 122. The plan shall include a listing of all leaks of these materials, a method for containment, a description of training, inspection and security procedures, and emergency response measures to be taken in the event of a discharge to surface waters or plans and/or procedures which constitute an equivalent BMP.

Sources of such discharges may include materials storage areas; in-plant transfer, process and material handling areas; loading and operations; plant site runoff; and sludge and waste disposal areas. unloading The BMP plan shall be developed in accordance with good engineering practices, shall be documented drawings, in narrative form, and shall include any necessary plot plans, or map,s.

The BMP plan shall be maintained at the plant site and shall be available for inspection by EPA and Department pdrsonnel.

6.

There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid.

PART III Page 28 of 31 Permit No. SC0004278

7. The permittee shall monitor all parameters consistent w conditions established by this permit on the 1st Tuesday of every calendar {thmonth, unless otherwise approved by this Department. Additional monitoring, as necessary  !

't o meet the frequency requirements of this permit (Part I.A. Effluent Limitations and Monitoring Requirements) shall be performed by the permittee.

The permittee shall notify the Department two (2) weeks prior to any changes in the monitoring schedule

8. Unless authorized elsewhere in this permit, the permittee shall meet the following- requirements concerning maintenance chemicals for the following waste streams: once-through non-contact cooling water, recirculated cooling water, boiler blowdown, cooling tower blowdown, and air washer water.

Maintenance chemicals shall be defined as any man-induced additives to the above-referenced waste streams. This includes materials added for corrosion inhibition including zinc, chromium, and phosphorus.

a. The discharge, in detectable amounts,. of any of the one hundred and twenty-six priority pollutants is prohibited, if the pollutants are present due to the use of maintenance chemicals.

b. Slimicides, algicides and biocides shall be used in accordance with registration requirements of the Federal Insecticide, Fungicide and Rodenticide Act.

c. The use of maintenance chemicals containing bis (tributyltin) oxide is prohibited unless written approval is obtained from SC0 HEC.

d. Any maintenance chemicals added to the above referenced waste streams must degrade rapidly, either due to hydrolytic decomposition or biodegradation.

e. The discharge of maintenance chemicals added to waste streams must be limited to concentrations which protect indigenous aquatic populations in the receiving stream and shall not exceed the "no observed effect level

(N0EL)"

The permittee shall keep sufficient documentation on-site which support that the above requirements are being met. The information shall be made available for on-site review by Department personnel during normal working hours. The occurrence of in-stream problems may necessitate the submittal of chemical i

additive data and may require a permit modification to include additional I

monitoring and limitations. The permittee may demonstrate compliance with f

these limitations to the South Carolina Department of Health and Environmental Control by either sampling and analyzing for the pollutants in the discharge or providing mass balance calculations to demonstrate that use of particular maintenance pollutants in the chemicals will not result in detectable amounts of the toxic discharge.

.' . 1 PART III Page 29 of 31 Permit No. SC0004278

9. The company shall noti fy the South Carolina Department o f. Health and Environmental Control in writing no later than sixty (60) d'ays prior to instituting use of any additional maintenance chemicals in the cooling water system. Such notification shall include:

- Name and general composition of the maintenance chemical Quantities to be used Frequency of use Proposed discharge concentration EPA registration number, if applicable

- Aquatic toxicity information

10. All sludges, waste oil and solid and hazardous waste shall be properly disposed o# in accordance with the rules and regulations of the Bureau of Solid and Hazardous Waste Management. Wfth' ety (90 d s of t r t effpti e dye, Armi) tee Kic e sp , d sp1id mayageme rid d){poy(phal Ip ctip6subpft

.ncJ afd flud e at this ilify f6r re,iew an agpfova '.

th ch ca4 m a'c aping 11._,....__..J,,

The South Carolina Department of Health and Environmental Control has determined that pursuant to Section 316(a) of the Act that the .

thermd comnnnent of the discharge controlled by the temperature criteria on page(2' & 3 Tof this permit assures the protection and propagation of a balanced, indigenous population of fish, shellfish, and wildli.fe. Results of the 316(a) demonstration shall be submitted and shall support that less stringent thermal effluent limitations will assure the protection and propagation of a balanced, indigenous population of fish, shellfish and wildlife in and on the receiving stream.

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12. Neither free available hh orine nor totalor-ine residual may be hrdt discharged from any unit for more than two hours in any one day, and not more than one unit in any plant may discharge free available or total residual chlorine at any one time unless the Permittee can demonstrate to SC0 HEC that the units in a particular location cannot operate at or below this level of chlorination.

3. (a) On a n b sN, a three-brood chronic toxicity test shall be conducted using a control and the instream waste concentratiori (IWC) of 100 % at Outfalls 001 and 002. The test shall be conducted using Ceriodachnia dubia as the test organism and in accordance with the most recent "Short-Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms" (EPA /600/5-89/01) and " South Carolina Procedures for Pass / Fail Modifications of the Ceriodachnia 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> Acute Toxicity Test and Ceriodachnia Survival and Reproduction Test" (SC0 HEC. May 1989 The raw. data and results shall be submitted in accordance with tPa)r 1.(C)(3) of the permit for each monthly test.

test must be perfor ed by a SC0 HEC certified laboratory. The h I i

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PART III l Page 30 of 31 Permit No. SC0004278 (b) Test results shall be analyzed ac, cording to statistical methods in Section .

12.13 in USEPA (1989) or the most'recent edition of this document.The  !

toxicity testgroup of the test shall be deemed a failure if survival and/6r reproduction is lower than that of the control group and this difference is significant at the o = 0.05 level.

h k(c) If a test fails, a toxicity evaluation plan shall be submitted to the Enforcement Section of the Bureau of Water Pollution Control within sixty (60) days of notification to the Department of test results.

.(d) The permittee must 4

), whether the test passes indicate on the discharge monitoring report forms or fails.

If the test fails, the number "1" shall be placed on on the form.

the form, if the test passes, the numbpr "0" shall be placed 4M w .c dey e ca /4 U e.jid M d S.q M P

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q,- (m) 5:chc cc,ucc.t+va-accaptabae-.monthe-cf tuaiciLy testing resut ts may BV OY rouil in querierly testing in i teu otM~hly te:.i.2 d4eecet.ian, .i. ihu Gepeet, ment's

14. A(ter twelve consecutive months of " passed" toxicity testing resh the Departmen-te v terminate the screening procynd4mporeWiiiittation.

Page 5 & 9 o'f tIIep'1frmtt--shal.1 the first dayponthnr the me7ffective and 4&8 shall expire on writing.

p rtment ...T r +ha> permittee in

15. The permittee shall commence all toxicity testing consistent, kith conditions ccknder-established by this permit during the first vnonth, unless otherwise approved by this Department. two (2) week QUA

[16 Multiple grabs shall consist of grab samples 6i$ cted at the approximate

@ beginning of the period of Total Residual Abbr 1Te and/or Free Available GWrite discharge and once every twenty (20) minutes until TRC or FAC is no longer present. i

$ pW '

17. The permittee shall maintain at the permitted facility a record of the method (s) used in measuring the discharge flow:

a) Estimate - Pump Curve Valve Opening Production Chart Tank Volume Water Use Records .

b) Instantaneous - Bucket and Watch Weir and Gauge Parshall Flume c) Continuous Totalizer '

Continuous Chart Recorder Records of any necessary calibrations must also be kept. This information shall be made available for on-site review by Department personnel during normal working hours.

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M LN 0 PART III v.)oyt%g*j(7 ,

Page 31 of 31 Permit No. SC0004278 l'ye, jf'\Y, N

gh 18. !The applicable effluent limitation derived for total residual chlorine

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l m(TRC) aximum. based on EPA Water Quality Criteria is 11.0 ppb average and 19.0 ppb jThepermitteemustanalyzetothelowestdetectablelimitofaSouthThe State I Carolina certified laboratory. If analytical capabilities improve, the new detection limit must be met down to the water quality limits of ,

11.0 ppb average and 19.0 ppb maximum. '

19.

Intake screen wash water, pump strainer backwash water, fire protection water,

&nd potable water systems may be discharged without limitations or monitoring requirements. Appropriate measures shall be taken to minimize any impact to the environmental.

20. The permittee shall not store coal, soil nor other similar erodible materials in a manner in which runoff is uncontrolled, nor conduct construction activities in a manner which produces uncontrolled runoff unless such uncontrolled runoff has been specifically approved by SCDHEC. " Uncontrolled" shall mean without sedimentation basin or other controls approved by SCDHEC.

21. Upset - (1) Definition. " Upset" means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the permittee.

An upset does not include noncompliance to the extent. caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or carele,ss or improper operation.

22. The once through noncontact cooling water system may be drained without limitations or monitoring requirements for maintenance activities, provided that the Catawba Nuclear Station takes proper measures to minimize environmental impact from this activity.

23. T h mi+tna chall daunlana nd subnui to = o##4ce #.ornppel a,-groundwatw-mon + tor-mg-p4an+ ui ni n :=t; '90) d:y: af-the-e(-fec-t4ve ggM f doe-o6 th.ts.-permit . The groundwater monitoring plan shall be prepared in accordance with South Carolina Well Standards & Regulations (Reg.61-71).

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CATAWBA NUCLEAR STATION , PAGE #1

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SUMMARY

OF REQUESTED NPDES PERMIT CilANGES 7/19/95

1. GENERAL APPLIES TO ALL SECTIONS 1.1. DELETE ALL REFERENCES TO Pl!ASE I AND PilASE 11

1. 2. ADD new effective date of permit to all sections 1.3. Renumber as needed

2. OUTFALL 001 2.1. ADD footnote (4) to reference 316a wording for temperature limitations

• 2.2. ADD Biomonitoring to first page and delete second page for 001 2.2.1. MODIFY footnote (1) to become (7) and delete a,b,c,d 2.3. ADD Nitrite limit of 4.3 mg/l 2.4. DELETE Temperature limitations per 316a 2.5. MODIFY Total Residual Chlorine to Total Residual Oxidant

2. 6. MODIFY note 3 to add words 'due to station operation'.

2. 7. MODIFY average flow of 82.5 MGD to 73.6 MGD

3. OuTFALL OO2 3.1. DELETE 'and metal cleaning wastes' to description 3.2. MODIFY Total Residual Chlorine to Total Residual Oxidant i 3.2.1. MODIFY footnote (3) 3.3. DELETE Ethylene Glycol due to new RQ and toxicity information.

l 3.4.

MODIFY note 3 to add words 'due to station operation'.

3.5. MODIFY average flow of 0.76 MGD to 1.29 MGD

3. 6. ADD Biomonitoring to first page and delete second page for 002. Carry Biomonitoring footnote 2. to first page and number as 5.

3.6.1. MODIFY footnote (1) to become (3) and delete a,b,c,d

3. 7. MODIFY hydrazine limit to 0.077 mg/l from 0.43 mg/l per toxicity testing

4. OUTFALL OO3 .

4.1, MODIFY note 3 to add words 'due to station operation'.

4.2. MODIFY average flow of 0.38 MGD to 0.35 MOD

5. OUTFALL OO4

6. OUTFALL 005 6.1, MODIFY Total Residual Chlorine to Total Residual Oxidant

6. 2. DELETE footnote 2. dealing with annual certification of chemical usage.

6.3. MODIFY footnote numbering

7. Part i Section B.

7.1. Delete all references to a schedule of compliance

8. Part i Section C.

6.1. Conditon #4. Add wording about analytical parameters that State does not certify for.

9. Pari li Section C.

9.1. Condition #4. Modify wording concerning alternative power source.

l. 10. Part in Section A.

I 10.1. Condition 3. Modify treatment plant classification and operator classification.

10.2. Condition 8. add additional sentence on toxicity testing.

10.3. Conditon 11. Modify wording on 316a approval. Delete word tentative.

10.4. Condition 10. Delete last sentence concerning submittal of sludge plan in 90 days

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• CATAWBA NUCLEAR STATION PAGE #2

SUMMARY

OF REQUESTED NPDES PERMIT CHANGES 7/19/95 10.5. Condition 12. Modify free available chlorine to free available oxidant.

10.6. Condition 13.(a) change monthly to quarterly. Add wording to read 'or test protocal approved by the Department'.

10.7. Condition 13(d) added wording on invalid samples 10.8. Conditon 13(c) and 13(c). Delete these* items as they are no longer applicable.

10.9. Condition 14. Delete item as not applicable. .

10.10. Condition 15. Modify month to quarter 10.11. Condition 16. Modify Total and Free Available Chlorine residual to Total and Free Available Oxidant.

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10.12. Condition 18. Insert adjudication agreement wording.

10.13. Condition 23. Modify item to state that groundwater shall be monitored in accordance with approved groundwater monitoring plan.

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