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Forwards Signed Page 90 of Form 2C,permit Renewal Application,Containing Required Info Re Addl Contract Laboratory & Other Info Requested.W/One Oversize Drawing
	ML20248L621
Person / Time
Site:	Sequoyah
Issue date:	06/02/1998
From:	Bajestani M; TENNESSEE VALLEY AUTHORITY
To:	Davis P; TENNESSEE, STATE OF
References
	NUDOCS 9806110272
	Download: ML20248L621 (52)
	v • d • e

- - _ _ _ _ _ _ _ - - _ _ _ _ _ - _

Tennessee VaNey Authortty, Post Omce Box 2000. Soody Daisy, Tennessee 37379-2000 -

t I . .. .

L Masoud saiestani

! Site Vice Presdent JUN 0 2 898 -

Sequoyah Nuclear Plant Mr. Paul Estill Davis, EM, Director Division of Water Pollution Control 6* Floor L&C Annex 401 Church Street Nashville, Tennessee 37243-1534

Dear Mr. Davis:

TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUCLEAR PLANT (SQN) - NATIONAL

. POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PEILMIT NO. TN0026459 -

DISCHARGE MONITORING REPORT (DMR) - PERMIT RENEWAL FORM 2C SIGNATURE AND OTHER INFORMATION REQUESTED Although the cover letter and page 5, General Information, of the January 15,1998, Permit Renewal Application were signed, the Signature was inadvertently omitted from page 90, Form 2C The signed fonn is enclosed for your scords. This form also contains the required information concerning an additional contract laboratory, Sp=-i=1ivM Assays, Inc. This laboratory was contracted to analyze samples for phenol as a part of the investigation conducted to resolve the suspect phenol results, noted in the original submittal, which were reponed by the contract laboratory, Environmental Science Corporation. i 1

Other enclosures are as follows:

1. An amended flow chart showing:

a) Cooling Tower Blowdown is initially discharged into a basin, called the Cooling Tower Blowdown Basin, b) discharge of the ERCW as a continuous line, c) identification oflaboratory waste discharges, and d)~ isqd change for Steam Generator Blowdown normal alignment from the Turbine Building Sump and Condensate Demi-li=s to the Turbine Building Sump and the Cooling Tower Blowdown Basin (details in Enclosure 7).

2... Amended Form 2C pages as you requested. [

a) . detailing indmdual values compnsing naximum daily values (where more than i sample was obtained during daily sampling),

b) deleting the "<" proceeding the maximum daily value or exalaiaia the presence of the f

"<" as appbcable, c) . changing boros nummum detection levels of <200 g/L (Although the laboratory initially reported 500 pg/L, confirmation that 200 pg/L was aclueved has been received.)

d) changing other meal cecentrations, based on the re-analysis of samples taken from Outfalls 101,103, and 116 either to actual values above the Required Detection Levels

)h (RDL) spect6ed in Rule 1200-4-3 .05 or to comply with epdM RDLs except for zine (An explanation of the practical ;-- hh limit for zine is provided in Enclosure 3.). :

Mk0$ck M7I e

mL

, w hhhhf hiR - - - - - - - __ --

Mr. Paul Estill Davis l Page 2 N 0 21998 l d) changing other metal concentrations, based on the re-analysis of samples taken from Outfalls 101,103, and i16 either to actual values above the Required

[ Detection Levels (RDL) specified in Rule 1200-4-3 .05 or to comply with s

specified RDLs except for zine (An explanation of the practical quantification limit for zine is provided in Enclosure 3.).

3. A request for a waiver from the Division of the RDL for zinc. This request is based on a S- laboratory Fractical Quantification Limit (PQL) of 6 g/L.

4. A request for a waiver from the Division of the RDL for those organic chemicals that could not be analyzed to the RDLs by the TVA Environmental Chemistry Laboratory.

This request is based on factors including a chemical review and conclusion that processes at Sequoyah do not introduce these chemicals into any NPDES discharge. A summary of this review is enclosed for your inspection.

5. A report on our investigation of the suspect phenol results provided by the initial laboratory analysis.

6. A status report on Watts Bar's EPA approval to analyze total residual chlorine down to 0.025 mg/L.

7. A request to change the normal alignment of Steam Generator Blowdown to Cooling Tower Blowdown Basin as needed for the protection of the steam generators. This was formerly the altemate flow path. The request and explanation of the need for this normal alignment are prcvided.

8. A request to submit toxicity results as either NOEC hypothesis test or as IC25.

9. A request to include annual dry and wet weather monitoring of Outfall 116 in lieu of l .. quarterly General Industrial Stormwater NPDES Permit sampling (or certification to be the same) of Stormwater Outfalls 5, 6,7, 8, and 9.

10. An ; unended Sequoyah map showing the location of Stormwater Outfalls 7 through 9 and the correct location of NPDES Outfall 116.

If you have any concems or requests for additional information, please contact Debby Bodine at (423) 843-6700.

, Sincerely, ,

h asou

.h jestam h ~

Enc res cc ( closures):

Mr. Larry Bunting - Mr. Terry Whalen Division of Water Pollution Control - Tennessee Department of Environment and 6* Floor, L&C Annex . Conservation 401 Church Street Chattanooga Field Office Nashville, Tennessee 37243-1534 Division of Water Pollution Control 540 McCallie Avenue, Suite 550 U.S. Nuclear Regulatory Commission Chattanooga, Tennessee 37402-2013 ATTN: Document Control Desk Washington, D.C. 20555 Cmm .__.m.____._ . - . - _ _ _ _ _ _ _ _

4-~~ dad <"*mo vacFAcuratFacNT 90 l f c n Y 5"yws,ep, er reas;n so t>aheve that any birJogcl test for ecuta er enconic.%

3 toxicity has been mace en any o , your as 8$,, $,,, r0 hN .*,*in reistien to your dischsrse m.hin the lart 3 yem?

o o e,o ta s..n va a , a s aa. ner tn. t.. t,, .n a a...n s. . .i, ,. .... .>..,

current NPDES Permit requires toxicity stupling 1/6 months at DSN 101. DSN 101'is DSN 103 is a portion of this major narge.

source of Sequoyah Nuclear Plant's discharge.There have been no ind 1995 until pri?cnt (the period since SQN has use. its current secondary system) treatment et '

chemicals.

n:ONrRACr ANALYSIS INFCRMArloN jCM-M N RbM M M -_rM 6 Nd f.ere any of the ansryses reported in item V performed by a contnc. taboratory or consulting firm?

Q Y ts fftet the noms, addrasa, and telephens nasm er of] and pollugents Q No (so to Section &

anaar sas >>. eun auan userstarr av r.r. ><iew ~"#

) fy,y,g ",G,",'; l"* " ~"'T^$t], ^"

-- ' A. M A m t l s.Acoatss l 615-758-5858 3roside, Total Environ = ental Science Corp. 12065 Lebanon Road ?henol, Cyanide Mt. Juliet, TN 37122 227 French Landing Drive. 615-255-2288 Toxicity Eckenfelder, Inc.

Nashville, TN 37228 606-276-3506 Toxicity Coc=onwealth Technology,Inc 2520 Regency Road Lexington, KY 40503 Specialized Assays, Inc. 2960 Foster Creighton Dr. 615-726-0177 Phenol Nashville, TN 37204-0566 l

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l . tEGriFiCATloN M-"3Mh%-% -=. e g g g g }- - Q w r " T C M P M Eartify unktpenstry oflow that this document snif allsetschments werepreparedundermy direction or supervisionin sceordance with a system desig

surs th:t quelifiedpersonnelpropertygsther andeveluste the information submitted. Eased on my inquiry of the person orpersons who mensge the systerrr or

osspersons direc*tyresponsible forgathering the information. the information submirted is. to the best cimy knowledge andbelief, true eccurate. and comp

\ ' sm ewste that ther,e ere significant penalties for suibmit.ing falso information, including the possibility of fine andimprisonm

,, pw o n g m e, g.r . ,os, a no.,

w e an e rr,g: Ag viyts gryp, ,,pnag; 1

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Mas'oudBajestani,VicePre)ident, Sequoyah Nuclear Plant 423-843-7001 -

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NPDES Permit Renewal Enclosure 3 TN0026450 - Sequoyah Page 1 of 1 jluclear Plant Additional Information Request for a Waiver of Analysis to the Required Detection Limit for Zine Sequoyah Nuclear Plant requests that the Division waive the requirement for analysi the Required Detection Limit of < 1 pg/L for zinc based on the following rationale:

The constituent of over 99% of Sequoyah Nucear Plant's Total Discharge to the Tennessee River is Outfall 101, the Diffuser Discharge from the Diffuser Pond.' Reanalysis of the metals sample for this Outfall was conducted within the six month allowable holding time. 'I Quantification Limit for this analysis in the TVA Environmental Chemistry Lab is 6 pg/L, however, the sample from Outfall 101 actually contained 8 pg/L zinc. Thus, this analvsis the actual amount of zine contained in over 99% of the total Sequoyah discharge. The sou the zine is probably a combination of the concentration in the influent to Sequoyah and storm runofE The TVA Emironmental Chemistry Lab is a typical emironmental laboratory. Zine is contained in airbome dust, lab instrument components and lab measurement desices. The presence oflow level zine in the laboratory surroundings prevents analysis below a practical quantification limit of 6 pg/L. Data is available to demonstrate the lack of reliability of the values obtained below this amount. Lower level analysis of zine would require a technique performed in a special

" clean" laboratory environment.

(

With the amount of zine in our major discharge being quantifiable as 8 pg/L and the value of <6 pg/L provided for Outfalls 103 and 116, we request that the Division waive analysis of to <1pg/L at other Outfalls.

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' Outfalls 103,107, and 112 (inactive at the present time) are discharged to the Diffuser Pond and discharged through Outfall 101. Outfall 110 and 118 are also inactive at this time. Outfall 116 and 117 are minor, non-process water discharges from screen and stnuner backwsshes.

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TN0026450 - Sequoyah NPDES Permit Rcnewal Enclosure 4 Nuclear Plant AdditionalInformation Page 1 of 20 Request for a Waiver of Analysis to the Required Detection Limit for Organic Compounds Sequoyah Nuclear Plant requests that the Division waive the requirement for analysis to the Required Detection Limit for Acrolein, Acrylonitrile, Benzene, Bromoform, Carbon Tetrachloride, Chloroform, Dichlorobromomethane, 1,2-Dichloroethane,1,1-Dichloroethylene,1,3-Dichloropropylene, Ethylbenzene, Methyl Chloride,1,1,2,2-Tetrachloroethane, Tetrachloroethylene, Toluene,1,1,1-Trichloromethane,1,1,2-Trichloromethane, Trichlorethylene, Vinyl chloride, 2-Methyl-4,6-dinitrophenol, Pentachlorophenol,2,4,6-Trichlorophenol, Acenaphthylene, Anthracene, Benzo (a) anthracene, Benzo (a) pyrene, 3,4-Benzotluoranthene, Benzo (k)fluoranthene, Bis (2-chloroethyl) ether, Bis (2-ethylhexyl)phthalate, Chrysene,1,2-Dichlorobenzene,1,3-Dichlorbenzene,1,4-Dichlorobenzene, Diethyl phthalate, Dimethyl phthalate, Di-n-butyl phthalate, 2,4-Dinitrotoluene, Fluoranthene, Fluorene, Hexachlorobenzene, Hexachoroethane, Phenanthrene, Pyrene and that the analysis for dioxin be waived.

Sequoyah Nuclear Plant has never had an NPDES Permit limit issued for any of the above pollutants. We have thoroughly examined this list of organic compounds, which due to the method detection limits (MDLs) at the TVA Environmental Chemistry Laboratory, were not analyzed to the Required Detection Limit in Rule 1200-4-3 0f. None of these compounds are produced by any process at Sequoyah. Further, a Chemical Control Program maintains stringent control over all chemicals used anywhere on the Sequoyah facility property. This program requires the review and approval of the Site Environmental Group )

and other groups before a chemical or compound is used by a TVA or contract employee.

The program is required for NRC reasons (the protection ofplant systems), EPA compliance (protection of the environment), and OSHA compliance (employee health and safety). Any chemical or compound that is approved for use is approved only for the use specified on the review form. Whether it is allowed to be disposed to any drains and specific disposal instmetions are provided. A copy of this " Chemical Review Form" is included for you review. None of these chemicals (even as an ingredient of a commercial product) are approved for any use that could result in their presence in an NPDES discharge from Sequoyah.

The success of the Chemical Control Program is demonstrated by the Exemplary Environmental Compliance Program rating received from 2 consecutive internal environmental audits. These audits are conducted over a 5 day period by a team of 4 to 5 media experts. Our Technical Specifications (plant license) and the TVA Board of Directors require such an audit.

Success is further verified by the reduction of hazardous waste generation from 10,445 Kg in 1994 to 1,027 Kg in 1997. Sequoyah has received a strength from the Industry ofNuclear

. Power Operations (INPO) for its Chemical Control Program TVA has recognized the success both in compliance and cost reduction and has initiated an Agency wide move to implement this program l

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TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 2 of 20 Our evaluation of these chemicals is summanzed as follows:

Acrolein -

Acrolein can be formed by oil or coal power plants according to EPA's IRIS database.

Because Sequoyah is a Nuclear Power Plant, the formation of acrolein, other than from the minimal use of emergency equipment, is not possible.

Acrolein is also used as a herbicide under the trade names "Aqualin" and "Magnacide-H" for l

control of weeds in irrigation canals. These herbicides are not approved for use at Sequoyah.

Acrolein is not a chemical approved for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include acrolein.

Therefore, acrolein cannot be introduced into efIluent discharges from processes at Sequoyah.

Acrylonitrile-Acrylonitrile does not occur naturally. According to the EPA OPPT Chemical Fact Sheet, it is produced by 5 companies in the United States and is used to produce high impact plastics, other plastics, a chemical used in nylon production, and in dyes, drugs and pesticides.

Sequoyah is a Nuclear Power Plant and thus, does not fall into these industry categories.

Acrylonitrile is not an ingredient of the pesticides approved for use at Sequoyah.

Acrylonitrile is not an approved chemical for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include acrylonitrile.

Therefore, acrylonitrile cannot be introduced into effluent discharges from processes at Sequoyah.

Benzene-Benzene is naturally found in air, water, and soil, and present in plants and animals according to EPA's fact sheet. It is a major industrial chemical made from coal and oil. It is also a component of gasoline. Because Sequoyah is a Nuclear Power Plant, the formation of benzene, other than from the minimal use of vehicles and some small equipment, is not possible.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Benzene is not an approved chemical for use by the Sequoyah Chemical Control Program. A search of the Approved Chemical database reveals that benzene is not an approved chemical for use at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include benzene.

Therefore benzene cannot be introduced into effluent discharges from processes at Sequoyah.

Bromoform -

Tribromomethane or bromoform is used for synthesis of chemicals and drugs, and as an industrial solvent according to the EPA Fact Sheet.

A search of the Approved Chemical database reveals that tribromomethane is not an approved

)

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 3 of 20 chemical for use at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include bromoform.

Therefore, bromoform cannot be introduced into emuent discharges from processes at Sequoyah.

Carbon Tetrachloride-Carbon tetrachloride has been produced in large quantities to make refrigerants and propellants for aerosol cans; however, production of fluorocarbon propellants is being phased out. Carbon tetrachloride is also used as a solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins and as a starting material in the manufacture of organic compounds.

I Carbon tetrachloride was formerly used as a dry cleaning agent, 5 ire extinguisher, grain l fumigant, and pesticide. This information was obtained from EPA's IRIS database and the fact sheet from the Office of Ground and Drinking Water.

Sequoyah minimizes the use of all aerosol cans as a part ofits Chemical Trame Control Program and Pollution Preventive Plan measures.

Carbon tetrachloride is not contained in any chemical approved for release to an NPDES outfall. A search of the Approved Chemical database reveals that carbon tetrachloride is contained in only one approved chemical at Sequoyah. This product is "HYPALON" 20 Synthetic Rubber. This product contains <0.4% carbon tetrachloride in its composition.

A search oflaboratory chemicals approved for use at Sequoyah does not include carbon tetrachloride. Therefore, carbon tetrachloride cannot be introduced into efDuent discharges from processes at Sequoyah.

Chloroform -

Chloroform may be prepared by the chlorination of ethyl alcohol or of methane, or by the action ofiron and acid on carbon tetrachloride; the latter is the principal industrial method in current use.

Chloroform is not used in the Sequoyah process. Chloroform is not contained in any chemical approved for release to an NPDES outfall. A search of the Approved Chemical database reveals that chloroform is contained in only one approved chemical at Sequoyah. This product is "HYPALON" 20 Synthetic Rubber which contains <0.04% chloroform.

A search oflaboratory chemicals approved for use at Sequoyah does not include chloroform.

Therefore, chloroform cannot be introduced into emuent discharges from processes at Sequoyah.

Dichlorobromomethane-Dichlorobromomethane is a colorless liquid, which may enter the environment from industrial discharges or spills according to the EPA fact sheet.

Dichlorobromomethane is not used in the Sequoyah process. Dichlorobromomethane is not an approved chemical for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include dichlorobromomethane.

Therefore, dichlorobromomethane cannot be introduced into emuent discharges from processes at Sequoyah f

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Inforrnation Page 4 of 20 1,2-Dichloroethane-1,2-dichloroethane is primarily used in the production of vinyl chloride as well as other chemicals. It is used in solvents in closed systems for various extraction and cleaning purposes in organic syntheses. It is also added to leadedgasoline as a lead scavenger. It is also used as a dispersant in rubber and plastics, as a wetting and penetrating agent. It may enter the environment from industrial discharges or spills according to the EPA IRIS database and the ATSDR's profde.

Sequoyah maintains a minimal amount of unleaded gasoline on site, but does not have any leadedgasoline on site.

1,2-dichloroethane is not used in the Sequoyah process.1,2-dichloroethane is not an approved chemical for use by the Sequoyah Chemical Control Program

.A search oflaboratory chemicals approved for use at Sequoyah does not include 1,2-dichloroethane.

Therefore,1,2-dichloroethane cannot be introduced into effluent discharges from processes at Sequoyah.

1,1-Dichloroethylene 1,1-dichloroethylene is used as an intermediate for organic chemical syntheses, and in the production of polyvinylidene chloride copolymers primarily for flexible fdms for food packaging. Air releases, primarily from emissions from polymer synthesis and fabrication industries, are the greatest source of ambient 1,1-dichloroethylene. Occupational exposure of 1,1-dichloroethylene may occur by inhalation or dermal contact. 1,1-Dichloroethylene has been detected at low levels in a number of ddnking water supplies across the United States j according to the EPA IRIS database and the ATSDR's profile. I 1,1-dichloroethylene is not used in the Sequoyah process.1,1-dichloroethylene is not an approved chemical for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,1-dichloroethylene.

Therefore,1,1-dichloroethylene cannot be introduced into efiluent discharges from processes at Sequoyah.

i 1,3-Dichloropropylene 1,3-Dichloropropylene is a manufactured chemical that does not occur naturally in the environment. It is a colorless liquid with a sweet smell. It is used mainly in farming to kill nematodes, which are pests that eat the roots of crops. It is often sprayed undiluted directly on the soils of vegetable and tobacco crops according to the ATSDR factsheet.

1,3-Dichloropropylene is not used in the Sequoyah process. 1,3-Dichloropropylene is not an I

ingredient of the pesticides approved for use at Sequoyah.1,3-dichloropropylene is not an approved chemical for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,3- i dichloropropylene.

l Therefore,1,3-dichloropropylene cannot be introduced into efIluent discharges from ]

processes at Sequoyah.

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! TN0026450 - Sequoyah i NPDES Permit Renewal Enclosure 4 j Nuclear Plant Additional Inforrnation Page 5 of 20 j

Ethylbenzene !

Ethylbenzene is a colorless, flammable liquid which is mainly used as a precursor to styrene.

It is present in " mixed xylenes," which are largely derived from petroleum. Ethylbenzene is also used as a solvent, as a constituent of asphalt and naphtha. Exposure to ethylbenzene occurs from the use of consumer products, gasoline, pesticides, solvents, carpet glues, vanishes, paints, and tobacco smoke. Ethylbenzene may enter the environment from petroleum-based industrial discharges or spills according to the EPA IRIS database and the ATSDR's profile.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and l prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit. Large vegetated or graveled areas form buffer zones between asphalt pavement and most Sequoyah discharges.

Ethylbenzene is not used in the Sequoyah process. Ethylbenzene is not an ingredient of the pesticides approved for use at Sequoyah. Sequoyah maintains a database of all chemicals approved for usc at the facility. A search of that database reveals that ethylbenzene is ,

contained in eight approved chemicals at Sequoyah. These chemicals and their percent {

ethylbenzene are as follows: 4300 Submarine Primer,20%; Quick Dry enamel,2%; 140654- '

Shiny White (Aerosol), 5%; Acrylic Enamel, 5%; Xylene,15%; Marsh AEC Marking Pens, 10%; CHEMLOK 220X,15%; and 3M General Purpose Adhesive Cleanei,10%. None of these chemicals are approved for release to an NPDES discharge.

A search oflaboratory chemicals approved for use at Sequoyah does not include ethylbenzene.

Therefore, ethylbenzene cannot be introduced into efiluent discharges from processes at Sequoyah.

Methyl Chloride Methyl chloride is a colorless gas used as a refrigerant, methylating agent, dewaxing agent, and catalytic solvent in synthetic rubber production It is also used as a chemical intermediate for gasoline antiknock additives, herbicides, and plastics. Methyl chloride is highly volatile with much of the chemical escaping to the atmosphere from water. It may enter the aquatic emironment from industrial discharges according to the EPA IRIS database and the ATSDR's profile.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reponing and I prompt cleanup of any spills in any quantity. This area is monitored by Enviromnental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit. l Methyl chloride is not used in any refrigerant approved for use at Sequoyah.

Methyl chloride is not an ingredient of the herbicides approved for use at Sequoyah. Methyl !

chloride is not used in the Sequoyah process. Methyl chloride is not an approved chemical for use by the Sequoyd Chemical Control Program.

TN0026450 - Sequoyab NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation {

Page 6 of 20 l i

1 A search oflaboratory chemicals approved for use at Sequoyah does not include methyl chloride.

Therefore, methyl chloride cannot be introduced into effluent discharges from processes at Sequoyah.

1,1,2,2-Tetrachloroethane 1,1,2,2-Tetrachloroethaneis a heavy, nonflammable liquid with a sweetish, chloroform-like odor. It is used as an industrial solvent; to make paint, varnish, and rust removers; in pesticide formulations; and to make other organic chemicals. It may enter the environment from industrial discharges, chlorination of municipal water supplies and sewage, or spills. 1,1,2,2-Tetrachloroethane has been detected in groundwater and surface water; however, a nationwide survey of drinking water supplies did not find any supplies containing 1,1,2,2-tetrachloroethane according to the EPA IRIS database and the ATSDR's profile.

1,1,2,2-Tetrachloroethane is not an ingredient of the pesticides approved for use at Sequoyah.

1,1,2,2-Tetrachloroethane is not an approved chemical for use by the Sequoyah Chemical Control Program.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,1,2,2-tetrachloroethane.

Therefore,1,1,2,2-tetrachloroethane cannot be introduced into effluent discharges from processes at Sequoyah.

Tetrachloroethylene Tetrachloroethylene is a clear liquid with a sweet chloroform-like odor. It is used primarily in dry cleaning and metal degreasing. Tetrachloroethylene is also used for rubber coatings, solvent soaps, printing inks, adhesives and glues, sealants, polishes, lubricants, and silicones.

Tetrachloroethylene has also been detected in drinking water. Exposure to tetrachloroethylene may occur from use of consumer products such as auto brake cleaners, suede protectors, water repellents, and silicone lubricants. It may enter the environment from industrial discharges, municipal waste treatment plant discharges or spills according to the EPA IRIS database and the ATSDR's profile.

Tetrachloroethylene is an ingredient in Wasp Cleaner, one of the pesticides approved for use at Sequoyah, but, not approved for discharge to an NPDES Outfall. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that tetrachloroethylene is contained in one other chemical at Sequoyah. This chemical is

i. CHEMLOK 220X with a tetrachloroethylene percentage of <l.0%. Neither the Wasp Cleaner i

nor the CHEMLOK 220X are approved for release to aa NPDES discharge.

A search oflaboratory chemicals approved for use at Sequoyah does not include tetrachloroethylene.

Therefore, tetrachloroethylene cannot be introduced into effluent discharges from processes at Sequoyah.

Toluene Toluene is a colorless liquid with a sweet pungent odor. The major use of toluene is as a mixture added to gasoline to improve octane ratings. Toluene is also used to produce i

?

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 7 of 20 benzene and as a solvent in paints, coatings, adhesives, inks, and cleaning agents. Toluene is also used in the production of polymers used to make nylon, plastic soda bottles, and polyurethanes and for pharmaceuticals, dyes, cosmetic nail products, and the synthesis of l organic chemicals. It may enter the environment mainly from industrial discharges according to the EPA IRIS database and the ATSDR's profile.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

l Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Sequoyah maintains a database of all chemicals approveJ for use at the facility. A search of that database reveals that toluene is contained in eight chemicals at Sequoyah. This chemicals and their toluene percent concentrations are as follows; Acrylic Enamel,17%; UTILAC Spray Enamel, 20%; Quick Dry Enamel, 21%; Endurabone Tack #3, 85%; Endurabone Intermediate

2,93%; M-Line RSK-1 Rosin Solvent,50%; Gilman 18-C-1 Solvent,100%; and F.R.P.

Panel Adhesive,444, unknown %. None of the chemicals are approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include toluene.

Therefore, toluene cannot be introduced into effluent discharges from processes at Sequoyah.

1,1,1-Trichloromethane 1,1,1-trichloromethane is used as a solvent and degreasing agent in industry. It is an ingredient in consumer products such as household cleaners, glues, and aerosol spray. 1,1,1-trichloromethane has recently found wide use as a substitute for carbon tetrachloride. 1,1,1-trichloromethane has been detected in surface and groundwater; individuals may be exposed 1 through the consumption ofcontaminated drinking water according to the EPA IRIS database and the ATSDR's profile.

Sequoyah maintains a database of all chemicals approved for use at the facility. A scarch of that database reveals that 1,1,1-trichloromethane is contained in ten chemicals at Sequoyah.

f This chemicals and their 1,1,1-trichloromethane percent concentrations are as follows; Safety Solvent #8060, >70%; Tri-Ethane (R) 366, 96%; Methylchloroform, 90%; Break-Free CLP, Aerosol,20.9%; Primecoat M-6, 70%; Aerosol Mop Treatment,40%; Gun Scrubber,98%;

Flushing Solvent, AH255,95.5%; Wasp Killer, unknown %, and Wasp and Hornet Spray 395, 85%. None of the chemicals are approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,1,1- {

trichloromethane.

Therefore,1,1,1-trichloromethane cannot be introduced into efiluent discharges from processes at Sequoyah.

1,1,2-Trichloromethane j 1,1,2-Trichloromethane is a colorless liquid with a sweet odor. It is used in making other chemicals and adhesives, and as a solvent. 1,1,2-Trichloromethane has not been reported in food or soil, and exposure from contaminated drinking water appears to be rare. It may enter the environment from industrial discharges, chlorinated effluents from municipal waste J

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 8 of 20 treatment plants, or spills according to the EPA IRIS database, and the ATSDR's profile.

1,1,2-Trichloromethane is not used in the Sequoyah process.1,1,2-trichloromethane is not approved for use at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,1,2-trichloromethane.

Therefore,1,1,2-trichloromethane cannot be introduced into efIluent discharges from processes at Sccmvah Trichloroethyee Trichlorethylene is a colorless !! quid with a sweet odor. It is used as a degreaser of metal parts, an extraction solvent for neases, oils, fats, waxes, and tars, a chemical intermediate in the production of other et eruicals, and as a refrigerant. Trichlorethylene is used in products such as typewriter correction fluids, paint removers / strippers, adhesives, spot removers, and rug-cleaning fluids. It may enter the emironment from industrial discharges, municipal waste treatment plant discharges, or spills according to the EPA IRIS database, and the ATSDR's profde.

Trichlorethylene is not used as a refrigerant at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that trichlorethylene is contained two chemicals at Sequoyah. There chemicals and their percent trichlorethylene are as follows: Wasp Killer, unknown %; CHEMLOK 220X, <1%. Neither of these chemicals would be approved for release to an NPDES outfall.

A scarch oflaboratory chemicals approved for use at Sequoyah does not include trichlorethylene.

Therefore, trichlorethylene cannot be introduced into effluent discharges from processes at Sequoyah Vinyl Chloride Vinyl Chloride is a colorless gas usually handled as a liquid with a faintly sweet odor. It is used in the plastics industry and to make other chemicals. Smaller amounts of vinyl chloride are used as a refrigerant gas. It may enter the environment through industrial effluents or spills according to an EPA fact sheet. Acco. 'ing to the ATSDR's profile, drinkmg water may contain vinyl chloride released from seepage into water in areas where chemical wastes are stored or form contact with polyvinyl pipes. Vinyl chloride is a microbial degradation product of trichlorethylene in groundwater.

Vinyl Chloride is not used as a refrigerant at Sequoyah nor is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that vinyl chloride is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include vinyl chloride.

Therefore, vinyl chloride cannot be introduced into effluent discharges from processes at Sequoyah.

TN0026450 - St;quoyah NPDES Pcrmit Renewal Enclosure 4 Nuclear Plant Additional Information Page 9 of 20 2-Methyl-4,6-dinitrophenol 2-methyl-4,6-dinitrophenol, also known as 4,6-dinitro-o-cresol, is a odorless liquid. It is used as a insecticide, fungicide, herbicide, and defoliant. Insecticidal spraying is probably the major emission source of 4,6-dinitro-o-cresol to the environment where it is still being used. In addition, wastewater efDuents from chemical plants have been found to contain 4,6-dinitro-o-cresol. 4,6-dinitro-o-cresol has been detected in the wastewater effluents from two U.S.

chemical plants. It was qualitatively detected in the wastewater from the Oak Ridge Gaseous Diffusion Plant. Information was found on the Spectrum Chemical Fact Sheet.

2-methyl 4,6-dinitrophenol is not an ingredient in any pesticides or herbicides used at Sequoyah.

2-methyl-4,6-dinitrophenol is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 2-methyl-4,6-dinitrophenol is an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 2-methyl-4,6-dinitrophenol.

Therefore, 2-methyl-4,6-dinitrophenol cannot be introduced into efDuent discharges from processes at Sequoyah Pentachlorophenol Pentachlorophenol is a light brown solid or it may be in solution. It has a pungent odor when hot. Its principal use is as a wood preservative, and it is also used in making pesticides and fungicides. It may enter the environment from treated wood, industrial discharges, municipal waste treatment plant discharges, spills, or agricultural mnoff according to an EPA fact sheet.

Pentachlorophenol is not an ingredient in any pesticide at Sequoyah. Pentachlorophenol is not used in the process at Sequoyah. There are very few treated lumber poles at the Sequoyah facility. Electricity is supplied and distributed mainly metal towers. Most railroad ties on Sequoyah property have long been covered with pavement or gravel.

Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that pentachlorophenol is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include pentachlorophenol.

Therefore, pentachlorophenol cannot be introduced into efDuent discharges from process at Sequoyah 2,4,6-Trichlorophenol 2,4,6-Trichlorophenol is a colorless to yellow solid with a strong odor. It is used as a wood and glue preservative, insecticide ingredient, bactericide and anti-mildew treatment. It may enter the environment from industrial or municipal waste water treatment discharges, leaching from site of application, or spills. Production of 2,4,6-trichlorophenol was discontinued in the Untied States in the 1980s according to an EPA fact sheet.

2,4,6-Trichlorophenol is not an ingredient in any pesticide at Sequoyah.

2,4,6-Trichlorophenol is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 2,4,6-trichlorophenolis not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 2,4,6-

TN0026450 - S@quoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 10 of 20 trichlorophenol.

Therefore, 2,4,6-trichlorophenol cannot be introduced into efDuent discharges from processes at Sequoyah.

Polycyclic Aromatic Hydrocarbons (PAHs)

According to the ATSDR's Public Health Statement, PAHs are a group of chemicals that are formed during the incomplete burning ofcoal, oil and gas, garbage, or other organic substances. PAHs can be man-made or occur naturally. They are found throughout the environment in the air, water, and soil. There are more than 100 different PAH compounds.

Although the health effects of the individual PAHs are not exactly alike, the following 15 PAHs are considered as a group: acenaphthene, acenaphthylene, anthracene, benz (a) anthracene, benzo (a) pyrene, benzo (b)fluroanthene, benzo (ghi) perylene, benzo (k)fluoranthene, chrysene, dibenz(a,h) anthracene, fluoranthene, fluorene, indeno(1,2,3-cd) pyrene, phenanthrene, pyrene. Most PAHs do not occur alone in the environment (including those found at hazardous waste sites), rather they are found as mixtures of two or more PAHs. They can occur in the air either attached to dust particles, or in soil or sediment as solids. They can also be found in substances such as emde oil, coal, coal tar pitch, creosote, and road and roofmg tar Most PAHs do not dissolve easily in water, but some PAHs readily evaporate into the air. PAHs generally do no burn easily and they will last in the environment for months to year. Exposure to PAHs may occur in soil near areas where coal, wood, gasoline, or other products have been burned. PAHs have been found in some '

drinking water supplies in the United States. PAHs have been found in coal-tar production plant, coking plants, bitumen and asphalt production plants, coal-gasification sites, smoke houses, aluminum production plants, coal-tarring activities, and municipal trash incinerators.

PAHs have also been found in other facilities where petroleum, petroleum products, or coal are used or where wood cellulose, corn, or oil are bumed.

l Acenaphthylene -

Acenaphthylene is one of the polynuclear aromatic hydrocarbons (PAHs) which are commonly ;

found in the emissions from burned coal plants and petroleum products according to the EPA IRIS database.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental i personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Acenaphthylene is not produced by Nuclear Power production ner is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A ,

search of that database reveals that acenaphthylene is not an approved chemical at Sequoyah, j and would not be approved for release to an NPDES outfall. !

A search oflaboratory chemicals approved for use at Sequoyah does not include acenaphthylene.

Therefore, acenaphthylene cannot be introduced into efDuent discharges from processes at j i

l g TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 11 of 20 Sequoyah. i Anthracene -

Anthracene is a naturally occurring compound found in coal-tar and formed during the incomplete combustion of organic compounds. It is a polynuclear aromatic hydrocarbon (PAH). Its principal use is in the manufacture of dyestuffs. Due to its widespread occurrence in nature and its use in the dye industries, anthracene enters the environment from non-point sources, as well as industrial and municipal discharges according to and EPA fact sheet.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release ofgasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weeldy to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Anthracene is not produced by Nuclear Power production nor is it used in the process at Sequoyah. A search of that database reveals that anthracene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include anthracene.

Therefore, anthracene cannot be introduced into effluent discharges from processes at Sequoyah.

Benzo (a) anthracene -

The pattern of benz (a) anthracene (BA), another PAH, release into air and water is quite general since it is a universal product of combustion of organic matter. Humans will be exposed to benz (a) anthracene iu ambient air, particularly in industrial areas, from stoves, cigarette smoke, food, and drinking water according to the Spectrum chemical fact sheet.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Benzo (a) anthracene is not produced by Nuclear Power production nor is it used in the process at Sequoyah.. Sequoyah maintains a database of all chemicals approved for use at the facility.

A search of that database reveals that benz (a) anthracene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include benz (a) anthracene.

Therefore, benz (a) anthracene cannot be introduced into effluent discharges from processes at Sequoyah.

Benzo (a) pyrene -

Benzo (a) pyrene, another PAH, is found when wood is burnt, coal or petroleum products are emitted, and when chemicals are released according to an EPA fact sheet.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 12 of 20 tank with secondary containment. The chance for any release ofgasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Benzo (a) pyrene is not produced by Nuclear Power production nor is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that benzo (a) pyrene is not an approved chemical at Sequoyah, A search oflaboratory chemicals approved for use at Sequoyah does not include benzo (a) pyrene.

Therefore, benzo (a) pyrene cannot be introduced into effluent discharges from processes at Sequoyah.

3,4-Benzofluoranthene -

3,4-benzofluoranthene, also known as benzo [b]Quoranthene, is one of the polycyclic aromatic hydrocarbon compounds. It is found in the coal tar pitch that industry uses to join electrical parts together. It is also found in creosote, a chemical used to preserve wood. Because 3,4-benzofluoranthene is formed when gasoline, garbage, or any animal or plant material bums, it is usually also found in smoke and soot. The greatest exposure to 3,4-benzofluoranthene is in

)

the workplace in coal tar production plants; coking plaa. ts; asphalt production plants; coal-j gasification sites; smoke houses; municipal trash incinerators; and facilities that burn wood, '

coal, or oil.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is mimmal Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stonnwater Discharge Permit.

3,4-benzofluoranthene is not produced by Nuclear Power production nor is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 3,4-benzofluoranthene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 3,4-benzofluoranthene.

Therefore, 3,4-benzofluoranthene cannot be introduced into effluent discharges from processes at Sequoyah.

Benzo (k)fluoranthene -

Benzo (k)fluoranthene is one of the polynuclear aromatic hydrocarbons (PAHs) which are commonly found in the emissions from burned coal plants and petroleum products according to the EPA IRIS database.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is muumal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitomd by Environmental

i TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 13 of 20 personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Pennit.

l Benzo (k)fluoranthene is not produced by Nuclear Power production nor is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the i

facility. A search of that database reveals that benzo (k)fluoranthene is not an approved chemical at Sequoyah.

l A search oflaboratory chemicals approved for use at Sequoyah does not include benzo (k)fluoranthene.

Therefore, benzo (k)fluoranthene cannot be introduced into efHuent discharges from processes at Sequoyah.

Bis (2-Chloroethyl) Ether-Bis (2-chloroethyl) ether is one of several chloroalkyl ethers. It is a colorless liquid used to make glycol products, rubbers, and insecticides; as a solvent for fats, waxes, and greases; as a scouring agent for textiles; and as a pesticide. It may enter the environment through industrial efDuents, spills, and possible from chlorination of water according to an EPA fact sheet.

Bis (2-chloroethyl) ether is not used in the process at Sequoyah.

Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that bis (2-chloroethyl) ether is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include bis (2-chloroethyl) ether.

Therefore, bis (2-chloroethyl) ether cannot be introduced into efBuent discharges from processes at Sequoyah.

Bis (2-Ethylhexyl)Phthalate -

Bis (2-ethylhexyl)phthalate (DEHP)is a colorless liquid with almost no odor. Its major use is in the production of polyvinyl chloride, where it is added to plastics to make them flexible according to EPA's IRIS database and ATSDR's profile.

DEHP is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that DEHP is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include DEHP.

Therefore, DEHP cannot be introduced into efHuent discharges from processes at Sequoyah.

Chrysene -

Chrysene is on EPA's list of suspect Environmental Endocrine Disruptor (EEDs). It is a co-planar molecule like many of the suspect EEDs and a PAH. Chrysene occurs in coal tar and it is formed during distillation of coal. It is also fonned in very small amounts during distillation or pyrolysis of many fats and oils. Thus, it is very wide spread and is commonly found in the environment, especially in conjunction with particulate mater from smoke stacks. Human exposure typically occurs from inhalation of contammated air and consumption of contaminated food and water or ingestion of certain foods such as smoked and charcoal broiled meats and fish. Especially high exposure can occur through cigarette smoking.

Chrysene is not used produced by Nuclear Power generation nor used in the process at Sequoyah.

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional information Page 14 of 20 Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that Chrysene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include Chrysene.

Therefore, Chrysene cannot be introduced into emuent discharges from processes at Sequoyah.

1,2-Dichlorobenzene -

1,2-Dichlorobenzene is a manufactured chemical. It is used as a solvent for waxes, gums, resins, tars, rubbers, oils, and asphalts; as a fumigant, insecticide, and degreasing agent for metals, leather, and wood; as an ingredient ofmetal polishes; and as an intermediate to make dyes. It may enter the environment from industrial and municipal discharges according to and EPA fact sheet.

1,2-Dichlorobenzene is not an ingredient in any pesticide used at Sequoyah nor is it used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 1,2-dichlorobenzene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,2-dichlorobenzene.

Therefore,1,2-dichlorobenzene cannot be introduced into emuent discharges from processes at Sequoyah.

1,3-Dichlorobenzene -

1,3-Dichlorobenzene is a liquid, used as an intermediate for the production of other chemicals; it is also a by-product in the production of 1,2-dichlorobenzene and 1,4-dichlorobenzene. It may enter the environment from industrial discharges or spills.

1,3-Dichlorobenzene is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 1,3-dichlorobenzene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include 1,3-dichlorobenzene.

'1 Therefore,1,3-dichlorobenzene cannot be introduced into eBuent discharges from processes

{

at Sequoyah.

1,4-Dichlorobenzene -

l 1,4-dichlorobenzene is a white solid with a sweet taste and a strong odor. It is used as an '

insecticide fumigant in moth balls. It is also used in toilet blocks as a disinfectant. It is also used as an intermediate in the production of other chemicals, in the control of tree-boring insects, and in the control of mold in tobacco seeds according to the EPA's IRIS database and i the ATSDR's profile. Due to its wide and general use,1,4-dichlorobenzene may enter the l environment from many sources, such as municipal emuents and landfdl leachates.

l 1,4-dichlorobenzene is not an ingredient in any pesticide at Sequoyah.

1,4-dichlorobenzene is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that 1,4- J dichlorobenzene is not an approved chemical at Sequoyah. .

1

c TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 15 of 20 A search oflaboratory chemicals approved for use at Sequoyah does not include 1,4-dichlorobenzene.

Therefore,1,4-dichlorobenzene cannot be introduced into efBuent discharges from processes at Sequoyah.

Diethyl Phthalate-i Diethyl phthalate is a manufactured chemical. It is used as a solvent for cellulose t.cetate to make varnishes and dopes, as a fixative for perfumes and in denaturing alcohol. It may enter the environment from industrial and municipal discharges according to an EPA fact sheet.

Diethyl phthalate is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that diethyl phthalate is not an approved chemical at Sequoyah, and would not be approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include diethyl phthalate.

Therefore, diethyl phthalate cannot be introduced into efDuent discharges from processes at Sequoyah.

Dimethyl Phthalate -

Dimethyl phthalate is a manufactured chemical. It is used mostly as a solvent and plasticizer for cellulose acetate and cellulose acetate-butyrate manufacturing. It is used in solid rocket propellants, lacquers, plastics, safety glasses, rubber coating agents, molding powders. It is also used as an insect repellent for personal protection against biting insects. It may enter the environment from industrial discharges according to the EPA's IRIS database and the ATSDR's profile.

Dimethyl phthalate is not an ingredient in any pesticide at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that dimethyl phthalate is contained in one approved chemical at Sequoyah. This chemical is Methyl Ethyl Ketone Peroxide or LUPERSOL DDM-9. LUPERSOL DDM-9 has 32%

dimethyl phthalate. It is not approved for release to an NPDES outfall.

A search oflaboratory enemicals approved for use at Sequoyah does not indude dimethyl phthalate.

Therefore, dimethyl phthalate cannot be introduced into effluent discharges from processes at Sequoyah.

Di-n-Butyl Phathalate -

Di-n-Butyl Phathalate is a colorless, oily liquid. It is often used as a plasticizer in the manufacturing of flexible plastic, a lacquer solvent, and an insect repellent. It is one of the several phthalic acid esters produced commercially. Di-n-Butyl Phathalate the environment from industrial discharges and in non-point discharges from the wide and general use of tids chemical according to an EPA fact sheet.

Di n-Butyl Phathalate is not used as an ingredient in any pesticides at Sequoyah. Di-n-Butyl Phathalate is not used in the process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that di-n-butyl phathalate is not an approved chemical at Sequoyah.

i TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 16 of 20 A search oflaboratory chemicals approved for use at Sequoyah does not include di-n-butyl

( phathalate.

Therefore, di-n-butyl phathalate cannot be introduced into efDuent discharges from processes at Sequoyah.

2,4-Dinitrotoluene - t 2,4-Dinitrotoluene is a yellow crystalline solid often found in the molten state. It is a manufactured chemical used as an ingredient in explosives (used as a gelatinizing and waterproofing agent), a stabilizer in the manufacture of smokeless powder, a raw material for dyestuffs, and for urethane polymers. 2,4-Dinitrotoluene may enter the environment from j

industrial discharges.

{

Dinitrotoluene is not used in the process at Sequoyah. Sequoyah maintains a database of all I chemicals approved for use at the facility. A search of that database reveals that dinitrotoluene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include dinitrotoluene.

Therefore, dinitrotoluene cannot be introduced into effluent discharges from processes at Sequoyah.

Fluoranthene -

Fluoranthene is one of the polycyclic aromatic hydrocarbons (PAHs) which are commonly found in the emissions from burned coal plants and petroleum products according to the EPA IRIS database.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release ofgasoline is minimal. !

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and j prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Fluoranthene is not produced by the generation of Nuclear Power nor is it used in the indt'strial process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that fluoranthene is not an approved 1 chemical at Sequoyah, and would not be approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include fluoranthene.

Therefore, fluoranthene cannot be introduced into efDuent discharges from processes at Sequoyah.

Fluorene -

Fluorene is one of the polycyclic aromatic hydrocarbons (PAHs) which are commonly found in the emissions from burned coal plants and petroleum products according to the EPA IRIS database.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release ofgasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental

1 TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant Additional Information Page 17 of 20 personnel at least weeldy to ensure no contamination is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Fluorene is not produced by the generation of Nuclear Power nor is it used in the industrial process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that fluorene is not an approved chemical at l

I Sequoyah, and would not be approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include fluorene.

Therefore, fluorene cannot be introduced into efDuent discharges from processes at Sequoyah.

Hexachlorobenzene -

Hexachlorobenzene is found in the form of white needles which may be dissolved in a liquid solution. It is used as a wood preservative, as a fungicide for treating seeds, and to make l other organic chemicals. It has been detected in environmental samples from around the world, and is recognized as a global pollutant. It may enter the environment from agricultural nmoff or atmospheric deposition according to an EPA fact sheet.

Hexachlorobenzene is not used in the industrial process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that hexachlorobenzene is not an approved chemical at Sequoyah.

A search oflaboratory chemicals approved for use at Sequoyah does not include hexachlorobenzene.

Therefore, hexachlorobenzene cannot be introduced into efBuent discharges from processes at Sequoyah.

Phenanthrene -

Phenanthrene is one of the polycyclic aromatic hydrocarbons (PAHs) which are commonly found in the emissions from burned coal plants and petroleum products according to the EPA l IRIS database. Release ofphenanthrene(PHEN) most likely results from the incomplete co.nbustion of a variety of organic compound including wood and fossil fuels. PHEN is a contaminant in air, water, sediment, soil, fish and other aquatic organisms and food according to a SPECTRUM Chemical Fact Sheet.

Sequoyah maintains a minimal amount of gasoline on site. This is held in an above ground tank with secondary containment. The chance for any release of gasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contammation is present as required by the SPCC Plan and our General Industrial Stormwater Discharge Permit.

Phenanthrene is not produced by the production ofNuclear Power nor is it used in the industrial process at Sequoyah. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that phenanthrene is not an approved chemical at Sequoyah, and would not be approved for release to an ' NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include phenanthrene.

Therefore, phenanthrene cannot be introduced into efDuent discharges from processes at Sequoyah.

_ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ . ._ . _ _ _ J

I TN0026450 - Sequoyah NPDES Permit Renewal I Enclosure 4 Nuclear Plant Additional Inforrnation Page 18 of 20 Pyrene -

Pyrene is one of the polycyclic aromatic hydrocarbons (PAHs) which are commonly found in the emissions from burned coal plants and petroleum products according to the EPA IRIS database.

Sequoyah maintains a minimal amount ofgasoline on site. This is held in an above ground tank with secondary containment. The chance for any release ofgasoline is minimal.

Sequoyah Spill Prevention Controls and Countermeasures Plan requires the reporting and i

prompt cleanup of any spills in any quantity. This area is monitored by Environmental personnel at least weekly to ensure no contamination is present as required by the SPCC Plan i

and our General Industrial Stormwater Discharge Permit.

Pyrene is not used in the industrial process at Sequoyah nor is it produced by the Nuclear Power production process. Sequoyah maintains a database of all chemicals approved for use at the facility. A search of that database reveals that pyrene is not an approved chemical at Sequoyah, and would not be approved for release to an NPDES outfall.

A search oflaboratory chemicals approved for use at Sequoyah does not include pyrene.

Therefore, pyrene cannot be introduced into effluent discharges from processes at Sequoyah.

Dioxin -

Dioxin is formed by burning chlorine based chemical compounds with hydrocarbons. The major source of dioxin in the environment comes from incinerators burning chlorinated wastes. Dioxin pollution is also afEliated with paper mills which use chlorine bleaching in their process and with the production of Polyvinyl Chloride plastics according to an EPA fact sheet.

Dioxin is not used in the process at Sequoyah. Sequoyah maintains a database of all cliemicals approved for use at the facility. A search of that database reveals that dioxin is an approved chemical at Sequoyah, and would not be approved for release to an NPDES discharge. A search oflaboratory chemicals approved for use at Sequoyah does not include dioxin.

Therefo e, dioxin cannot be introduced into effluent discharges from processes at Sequoyah.

A copy of our Chemical Control Program, Chemical Review Form follows.

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 19 of 20 CHEM REVIEW FORM CTC Tracking Number 1

(Requester Must Complete This Section)

NEW CHEMICAL REVISE USE OR QUANTITY PRODUCT INFORMATION:

Product or Trade Name Chemical Name TilC Number (if Available) MSDS Attached Yes No Manufacturer: Telephone Address: City State Zip Shelf Life: Plant Code: BFN BLN SON WBN ALL USE INFORMATION:

Intended Use:

Specification Document:

Average Quantity Used Monthly / Yearly Frequency KEY CONTACT:

Name SSN Organization Ext.

(Applicable to Request for Use Code I,11 & V

[if used on austentic stainless steel or nickel-based alloys] Requester Must Attach Analysis)

CHEMICAL INFORMATION: Chemical Testing Required *: YES NO if yes, complete the following:

Total Halogens opm Leachable Fluoride ppm Leachable Chloride opm Total Sulfur opm Total organics opm Chelating agents % pH OPERATIONAL RESTRICTIONS: Effects on plant systems, safety-related systems, structures and components, materials, including austenitic stainless steel or nickel-base alloys, and plastics:

RADIOACTIVE WASTE? (Applicable Use Code 1,11, til or V, if CHEM is to enter RCA)

Specify ACL general category and site work requirements.

[Go to page 3 of 3 ' Approvals"]

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 4 Nuclear Plant AdditionalInformation Page 20 of 20 SAFETY REQUIREMENTS: HMIG RATING: Health Flammability _._ Reactivity Other ENVIRONMENTAL REVIEW:

ENVIRONMENTAL RESTRICTIONS:

Location /Use Restrictions

, Discharge covered by NPDES permit: YES NO Discharge Seria! #

Hazardous Waste: YES NO EPA Hazardous Waste Code n HAZARDOUS INGREDIENTS (%):-

m Reportable Quantity:

m TPQ lbs. (40 CFR 355); 40 CFR 370 Reporting Quantity ibs.

m (40 CFR 302) Extremely Hazardous Substance YES NO Disposal Instructions:

Solid Waste:

"Special Waste " Hazardous Waste Spill Cleanup Requirements Approval: YES_NO USE CODE APPROVED CHEMICAL NO.

MAXIMUM OUANTITY SUBSTITUTE EMERGENCY USE APPROVAL SPECIAL ISSUE NO.

RadChem Manager or Designee RESTRICTIONS FOR EMERGENCY APPROVALS Signature __

Date Revision #

Site Environmental Manager or Designee Special waste and hazardous wastes disposal must be performed be Site Environmental personnel.

Call 7324 and make arrangements for transfer of product ownership.

[Go to page 3 of 3 ' Approvals") Approvals may be by this approval form or by Hewlett Packard SQHP2 ID approval.

TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 5 Nuclear Plant Addidonal Information Page 1 of 1 INVESTIGATION OF PHENOL VALUES Environmental Science Corp. was contracted to perform the phenol and cyanide analyses for the Sequoyah NPDES Permit Renewal. He results received indicated that one sample from the intake, upstream of Sequoyah contained 470 ug/L of phenol. Other results indicated lower, but detectable levels, of phenol at other Sequoyah Outfalls. The Tennessee River at the Intake at Sequoyah should not contain detectable levels of phenol nor should the Sequoyah process add phenol to wastewater herefore, these results were believed to be laboratory error.

To investigate the data originally received, additional samples were collected from the Sequoyah Intake, Outfall 101 (Diffuser Pond discharge to the Tennessee River) and Outfall 103 (Low Volume Waste Treatment Pond Discharge). These samples, along with Quality Control Samples were submitted to two laboratories, Environmental Science Corp. (ES) and Spu+6M Assays (SA). Results were as follows:

Concentration of i d Sample Lab Result True Recovery ID Value sample collected QC-PH-1 SA 0.106 mg/L 0.113 94 % Not Applicable mg/L QC-PH-1 ES 0.150 mg/L 0.113 133% Not Applicable mg/L Intake SA ND NA Not Applicable )

(Quan limit 1.0 ug/L)

Intake ES <0.040 mg/L NA Composite of 4 samples -

Average <148 pg/L, individual results were <40,470, <40, <40 i pg/L collected over a seven i hour period.

Outfall SA ND NA Not Applicable 101 (Quan limit 1.0 ug/L)

Outfall ES <0.040 mg/L NA Composite of 4 samples-101 Average 62 pg/L, individual results were 46,77,46,41pg/L collected over a six hour period.

Outfall SA ND NA Not Applicable 103 (Quan limit 1.0 ug/L)

Outfall ES <0.040 mg/L NA Composite of 4 samples-103 Average 180 pg/L, individual results were 42,370,200,110 pg/L collected over a six hour period.

A high bias (133% recovery) was show in the ES QC result. Further, the Quan. Limit at SA is I ug/L while the limit at ES is 40 ug/L. Based on the bias shows here, and the much higher quantification limit at ES, it is believed that laboratory error caused false positive results in the initial phenol samples. SA has been added as a contract laboratory to our Form 2C.

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TN0026450 - Sequoyah NPDES Permit Renewal Enclosure 6 Nuclear Plant Additional Information Page 1 of 1 Status of Watts Bar Nuclear Plant's EPA Approval of Total Residual Chlorine Method Allowing Detection to 0.025 mg/L TVA's Watts Bar Nuclear Plant has obtained the approval of an analytical method allowing detection of total residual chlorine (TRC) down to 0.025 mg/L. However, this method is complex and requires the use of chemicals that could cause hazardous waste to be generated. Due to both the complexity and to minimize hazardous waste generation, Sequoyah would prefer to explore the alternate method, calorimetric determination, to 0.050 mg/L using a digital colorimeter and potassium permanganate standardization. We will write a required Site procedure for analysis by this method and verify the Method Detection Limit of 0.050 mg/L or less. Sequoyah will repon the MDL to the Division when determined.

Sequoyah would prefer to maintain calculated instantaneous maximum compliance with permit limits but, would like to be able to verify the concentrations at Outfall 101 using the colorimeter at any time. We propose that a measured value be obtained weekly in addition to the calculated values for verification purposes ofless than MDL (5 0.050 mg/L) at the discharge of Outfall 101.

Sequoyah proposes to use the Outfall 101 flow in gallons per minute from the Thermal Compliance flowrate, together with concentration of TRC and flow rate in treated systems for calculation of the instantaneous maximum TRC value at Outfall 101. This is a very conservative approach, allowing no credit for the chemical reaction of the TRC with the organic matter contained in the Condenser Cooling Water (CCW) during the 4 to 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> transport time in the Diffuser Pond from entry until the flow reaches Outfall 101.

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Request for Change of Sequoyah Nuclear Plant, NPDES Permit TN0026450 Steam Generator Blowdown Alternate Alignment to Normal Alignment to Cooling Tower Blowdown Basin Sequoyah Nuclear Plant, NPDES Permit TN0026450, requests to change the normal alignment of the Steam Generator Blowdown from the Turbine Building Sump and the Condensate Demineralized System to the Turbine Building Sump and Cooling Tower Blowdown Basin. This alignment is approved in our current NPDES Permit as an alternate alignment, to be used by the authority of Plant Management.

Typically, Steam Generator Blowdown has been aligned to the Cooling Tower Blowdown (CTB) Basin dudng plant startups or during periods of chemistry excursions. The discharge at the Diffuser Pond (Outfall 101) is not significantly affected by the choice of Steam Generator Alignment. The Flowchart for the NPDES Permit renewal application has been amended to reflect this request.

The Condensate Demineralized System has been identified as a source of harmful contammates to the plant systems (primarily sodium and sulfate). Changes in operational practices at Sequoyah are needed to protect the plant piping from corrosion products and to prolong the life of our Steam Generators. The need to replace Steam Generators has been the key factor in the decision to close many nuclear plants. To climinate Condensate Demineralized System contaminate input to the Steam Generators, both Unit I and Unit 2 Steam Generator Blowdown should be normally aligned to Cooling Tower Blowdown Basin.

Design limitations of the Condensate Demineralized System prevent achieving the needed Steam Generator water chemistry required by present day sinnerds. Improved makeup water chemistry using our reverse osmosis system will allow achievement of desired water chenustry conditions without the contaminates introduced by Steam Generator Blowdown treatment using ion exchange resins.

Alignment of the Steam Generator Blowdown to the Cooling Tower Blowdown Basin will allow secondary cycle operation with reduced chemical injection rates. Thus, this alignment will reduce the overall release quantity of chemical additives (ethanolamme, dimethylamine, boric acid, and hydrazine).

Presently, normal practice is to process Steam Generator Blowdown and Condensate by use of the Condensate Demineralized System for reuse. However, contammants removed by the Condensate Demineralized System are then concentrated on ion exchange resin. When the resin is regenerated by use of sulfuric acid and sodium hydroxide, the contammants removed and concentrated on the resin, together with, the sulfates and sodium from the sulfuric acid and sodium hydroxide are released as regeneration waste. The regeneration waste is then discharged via the Turbine Building Sump.

Condensate polishers will still be necessary to provide system cleanup following outages, during excursions resulting from contamination introduced to systems (such as condenser tube leaks), and during periods of excessive primary to secondary system leak. ige. However, the elimmation of their routine use will provide both improved Steam Generator chemistry and lessen the amount of chemicals contained in the Sequoyah waste water discharge.

l. TN0026460 -Sequoyah NPDES Permit Renewal Nuclear Plant - Enclosure 8 Additionalinformation Page1 of5 l Request to Allow the Toxicity Reporting as the Applicable Test of the NOEC Hypothesis Test or as the IC25 May 26,1998 Mr. Paul Estill Davis, EM, Director Division of Water Pollution Contro!

6* Floor, L&C Annex 401 Church Street Nashville, Tennessee 37243-1534

Dear Mr. Davis:

TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUCLEAR PLANT (SON)

NPDES PERMIT NO. TN0026450 - TOXICITY TESTING REQUIREMENTS The subject permit, effective September 1,1993, contains Part 111 biomonitoring requirements for evaluating acute (96-hour) and chronic toxicity of Outfall 101.

Requirements for the chronic tests include a measurement of the no observable effect concentration (NOEC) to be determined in accordance with Short-term Methods for Estimatino the Chronic Toxicity of Effluents and Receivino Waters to Freshwater Oraanisms. EPA /600/4-89/001(a), or the current edition.

For some time there has been considerable attention paid to establishing more appropriate statistical procedures for deriving test compliance endpoints. EPA determined in its March 1991 Technical Support Document for Water Quality-Based 'oxics Control (pages 4-6) that a 25 percent inhibition concentration (ICs point estimate)is approximately the analogue of the NOEC determined using hypothesis testing. Also, EPA staff who developed the cited toxicity test methods (Norberg-King,1991) reported that ICs point estimates were comparable to the NOECs for 23 effluent and reference toxicant data sets analyzed. EPA, through funding provided to a Society of Environmental Toxicology and Chemistry (SETAC) Whole Effluent Toxicity Expert Advisory Panel, is currently still investigating appropriate statistical methods and endpoints for determining whole effluent toxicity (WET) compliance. A thorough l discussion of this issue, presenting advantages and disadvantages of various l

statistical methods, can be found in the 1996 SETAC publication Whole Effluent l

Toxicity Testino: An evaluation of Methods and Prediction of Receivino System imoacts.

On November 6,1992, TVA's Office of Fossil & Hydropower notified the Tennessee Division of Water Pollution Control of its intent to use the 1C 3 '

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' TN0026460.Sequ:yah NPDES Permit Renewal Nuclear Plant Enclosure 8 AdditionalInformation Page 2 of 5 statistical endpoint for determining compliance at facilities in Tennessee and noted that the same analysis was also being required by the State of Kentucky (See enclosed Letter, R. G. Ruffner to Larry Bunting). Tennessee responded to that notification by requesting assistance incorporating the IC2 s into NPDES permit biomonitoring language. Tennessee then included that language into the next NPDES permit issued to WA's Kingston Fossil Plant.

In accordance with NPDES Permit No TN0026450, Part 111 B, TVA is currently following statistical procedures contained in the EPA methods document EPA- '

600-4-91-002, revised July 1994. In Section 9.5, Choice of Analysis, (page 49),

EPA allows a choice of analyses between (1) hypotheses testing and (2) point estimation (i.e., Linear Interpolation Method) for determining the compliance chronic test endpoint. In Section 9.5, there is a bold-print notation stating that "For the NPDES Permit Program, the Point estimation techniques are the preferred statistical methods in calculating end points for effluent toxicity tests." In most instances, depending on the toxicity test dose-response curve, WA's choice for the chronic endpoint determination is the Point Estimate, IC2s analysis, which is in accordance with the procedures manual's recommendation.

However, in some cases where a dose response deviates substantially form monotonicity or where there is an "all or nothing" response from one concentration to the next in the concentration series, Point Estimation would nat be the statistical analysis of choice (EPA-600-4-91-002, Section 9.7.2), in which case hypothesis testing would be used.

TVA believes it is necessary to retain the allowed choice of statistical methods for determining the compliance endpoint, with point estimation (IC2s) being the default analysi. unless dose-response curves indicate an altemate method (i.e.,

hypothesis tests) should be utilized. In that event, WA would confer with TDEC, as has been our practice in the past.

TVA also is aware of several WET implementation issues that were presented at a SETAC/ EPA workshop held September 1995 in Pellston, Michigan. Many of those issues are being evaluated as part of EPA's National WET implementation strategy that resulted from a WET stakeholder' meeting held September 1996 in Washington, DC. One major issue involves the present point of discussion, which is the appropriate statistical method (s) for determining WET compliance.

EPA's recommendations with regard to this matter are still being evaluated and may eventually evolve into some type of regression analysis. TVA would like to retain the option of implementing any, improved statistical methods adopted by EPA with TDEC's concurrence.

I appreciate your consideration of this matter and ask that TDEC notify me of its concurrence with TVA's interpretation of the most recent edition of EPA's chronic test statistical methods as they relate to compliance with NPDES Permit No.

TN0026450. If you have any questions, please call Don Wade of TVA's

TN0026460 -Sequoyah NPDES Permit Renewal Nuclear Plant Enclosurs 8 Additionalinformation Page 3 of $

Resource Group at (256) 386-2068. Debby J Bodine may be reached at (423) 843-6700. She will forward your questions to me.

Don Wade W4/60 by D. J. Bodine, Sequoyah Environmental Manager l

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MAY-26-a998 07:00 LJATER MAtGGEMENT 205 386 2031 P.01

- _ = _ -

tueesee weser we*y $ es us*c sum C n _. A r m eee pace November 6, 1992 Mr. Larry Nunting Tennessee Division of water Pollution Control 51sth Floor Assex 401 Church Street .

Nashville, Teasessee 37243 Dear Mr. Nustiagt TENNESSEE VALLET AUTHORITY - ALLEN T05fIL PLANT (ALF) FPDES PERMIT NO.

TN000ssss, GALLATIN rossIL PLANT (GAT) NPDES PERMIT NO. TNc005428, AND JONNSONVILLE FOS $1L PLANT (J0t) NPDES PERMIT NO. TN0005444 - TOKICITY TESTING REQUIREMENTS The draft NFDEs permits dated August 25 for ALF, Jor, and Ghr contain Part III blomonitoring requirements for evaluatlag acute and chronic toxicity. ' Requirements for CIBOMIC tests f acinde a measurement of the no observable effects level (30EL) to be determined by fellowing

, procedures contained la uh rt. term Mee h as for_En&t=mattime the chronig Teele_Itw of _ fffluents and Receiviner Waters to Freshwater Creanisms, IFA/600/4/-SP/001.

The referenced EPA document was supplemented in September 1989 (Revision 1) to include use of a linear laterpolation method, pelat estimatios techalque for determining the Ishibition Concentration (IC25) for the analysis of data from the Fanand__kim Larval Survival and Crewkh Test (Method 1000.9) and the Cariodanhala Earvival and kenrednekion Test (Method 1002.0). The IC25, which is the analogue of a 308L determined uslag hypothesis testing, is the preferred statistical method for determialag the NCEL (March 1991 EPA Technical Support Document for Water Quality-sased Toxies Control, pages 4-6).

T7A requests permission to utilise the point estimatlag techsigues (IC35) for determining the NOEL for any chroalc tests required ir.

Temmessee (final permits la Esatucky already require this approach).

This change will facilitate our testimy schedules and provide test end pcists more is line with specific dilution-based NCEL concentrations 4

t F1AY-36-1996 07:01 IJATER Wr#EMENT 205 336 2031 P.02 Mr. Larry Busting Page 2 November 6, 1992 specified in the draft Tennessee BFDES Permits. Me also plan to use the chronic testing protocols for Geriving the 95-hour lethality end point as described under the Part III chronic test requirements. This will allow TVA to generate 96-hour QA control chart data directly freen our monthly chronic reference toxicant tests without having to set up a separate (acute protocol) series of tests.

We appreciate your consideration of our reguest and ask that the Tommessee Department of Mater Pollutlos Control either incorporate additional language into the final permits or notify me in writing if you concur.

If you have any questions, please call Don Made of TVA*s Aguatic Research Laboratory at (205) 356-20s7 in Muscle shoals, Alabama. If you prefer, you may call Larry Molfe of my staff at (615) 751-6436 in Chattanooga, and he w!11 forward your questions to Mr. Made.

Correspondence should be addressed to og at the following address:

Tennessee valley Authority 1101 Market street 3F Blue Ridge Place Chattanooga, Tennessee 37402-2801 Very truly yours, s

M. .. K er Manager of Environmental Aff airs TOTR. P.02

TN0026450 -Sequoyah NPDES Permit Renewal Enclosure 9 Nuclear Plant AdditonalInformation Page 1 of 1 Request to Allow the Annual Monitoring of Outfall 116 Sequoyah requests the Division to add Stormwater as a constituent to the Discharge of Octfall 116. . We propose to monitor Outfall 116 by boat annually, once during wet weather conditions and once during dry weather conditions for total suspended solids, oil and grease, and pli Outfall 116 is a nonprocess discharge of water used for backwashing of screens and strainers at the Condcaser Cooling Water Intake Station. The current permit requires no analytical monitoring of this Outfall.

Inclusion of analytical of annual stormwater monitoring would allow the removal of Sequoyah NPDES General Industrial Stormwater Discharge Outfalls 5 through 9 and include monitoring of those Outfalls under the Industnal Discharge Permit as is consistent with other stormwater discharges to Sequoyah NPDES General Permit Outfalls.

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APERTURE CARD / PAPER COPY AVAILABLE THROUGH NRC FILE CENTER bUMBER OF OVERSIZE PAGES FILMED ON APERTURE CARD ACCESSION NUMBERS OF OVERSIZE PAGES:

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Dear Mr. Davis:

Dear Mr. Davis:

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