ML20203G954
| ML20203G954 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 02/25/1998 |
| From: | Myers L CENTERIOR ENERGY |
| To: | OHIO, STATE OF |
| References | |
| PY-CEI-OEPA-028, PY-CEI-OEPA-28, NUDOCS 9803030120 | |
| Download: ML20203G954 (11) | |
Text
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tow w ur m sto no s m i W c /hufvol lde t 44J .W) bdN l'cbruary 25,1998 PY CEl/01:PA-0288L Ohio linviromnental Pro:cction Agency Division of Water Pollution Control Enforcernent and Compliance Section 1800 Watermark Drive, P.O. Ilox 1049 Columbus, Ohio 43266-0149 Gentlemen:
The Perry Nuclear Power Plant (PNPP) has enlisted Nalco Chemical Company to provide a replacement for the scale inhibitor product curremly in use in the plant circulating water system. The product currently in use for calcium scale control is Betz Depositrol 860D, which was approved for use under Director's Final Findings and Orders on May 11,1995. PNPP intends to replace the lletz product with DYNACOOL 1385 scale inhibitor / dispersant.
The cherr ' cal will be injected continuously into the suction forebay of the circulating water system at a rate of 7 to 27 gallons per day to achieve a maximum concentratLm of 2.5 ppm DYNACOOL and I ppm active organic phosphate in the circulating water. The discharge flow rate from the circulating water remains at 13,000 gpm. This combined with 14,000 gpm service water distharge flow rate at the plant discharge results in a discharge of 1.2 ppm whole product concentration and .48 ppm active phosphate residual. This does not represent an increase in product at the discharge, and is well within PNPP permit requirements.
Attachments I and 2 contain the information required in accordance with Ohio EPA procedures. fiince PNPP hopes to initiate this change in March, we would appreciate your notifying us of;he results of your evaluation as soon as possible. If you have questions or require additional information, please contact Donna Tizzano at (440) 280 5514.
Very truly yours, f /*
Attachments _
/ l DOT:sc cc: NRC Region 111 NRC Resident inspector NRC Project Manager NRC Document Desk (Docket No. 50-440) 9003036a20 900225 pa ao" " 88A ggg11pg11151
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' Altschment i Information for Obtalnirg Approval for Cooling Water Additive
- 1. The name of the addithe to be used and general product information.
1 l
- a. Material Safety Data Sheet (MSDS) attached. .
- b. Nalco DYNACOOL 1385 is a liquid phosphonate scale inhibitor and polymeric dispersant designed for scale l inhibition.1he product is an aqueous solution of potasium phosphonate (30%) and acrylic polymer (5%). l
- c. l.hydroxyethylldene 1,1 diphosphonic acid 4', calen.m carbonate scale inhibitor l
- c. No I'll'RA or EP/. l.D. number spplicable .
S 2. The concentration of the additive to be used (mg/l).
- m. To be a! plied to the suction forebay of the circulating water purnps continuously, j- b. Continuous
- c. "Ihe application and feed system begin with a 1000 gallon bulk DYNACOw. l385 storage tank, constructed -
of high de'sity cross linked polyethylene and is in accordance with ASTM Dl998 96. Flexible, reinforced ,
l l PVC tubing wl'l connect the tank to an automatically controlled chemical feedpump system. Product will be i fed through the PVC hor.e via floor penetrations into the suction forebay, i
- 3. The espected concentration of the additive contained in the discharge or blowdown immedintly prior to entering state surface waters, i a, lilowdown .itream from recirculating water system everage = 13,000 GPM Service w ser flow to discharge average a 14.000 GPM
- Total discharge - 27,000 GPM i- Diludon ratio - 1.1 : 1
. Maximum efiluent whole product concentration = 1.2 ppm product Mwimum active pho.sphonate residual = .48 ppm Analyncal detection limit for P = .01
- b. No detoxification
- 4. The average flowrote (MGD) and.the outfall number of each outfall conf alninp the additive. 1
- n. Average flowrate from discharge structure is 39 MOD (27,000 GPM) from Outfall 311100016004,
- 5. Name of the state surface water that receives the discharge.
- n. Lake Eric receives the combined discharge.
- 6. Tosicity and environmentalinformation for the additive,
- n. 96 i hour static acute LC50 to Rainbow T out = > 1000 mg/l
- 96. hour no observed effect concentration is 1000 mg/l for no mortality or abnormal effects r
48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> static acute LC50 to Dar hda magna = 797 mg/l
- 48. hour no observed effect concentration is 400 mg/l based on no monality or abnormal efrects
- b. n-octanol partitioning coefficient not applicable for this product, in the environment, the phosphonate ingredient reverts to orthophosphate and carbon dioxide and the
- acrylle polymer ingredient is absorbed to solids.
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3I N A 1.C O C H E M I C A t. O M 82 A F'""'*- - - - 7,N,.Y.' m
, , MATERIAL SAFETY DATA SHEET PRODUCT
, Attachment 3 ,
DYNACOOL 1305 SCALE INIIIBITOR N A LC O ,
Emergency Telephone Number Eedical(800) 462 5378(24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) (000)1 M ALEHT 4
SECTION 1 PRODUCT IDENTIFICATION TRADE IUJiE: DYllACOOL 1385 SCALE IUllIBITOR DESCRIPTION: An aqueous solution of potassium phosphonate and acrylic polymer NFPA 704M/IIMIS PJsTING: 1/1 IIEALTil 1/1 FLAMMADILITY 0/0 REACTIVITY 0 OTitER 0= Insignificant 1 Slight 2. Moderate 3 liigh 4= Extreme SECTION 2 COMPOSITION / INGREDIENT INFORMATION Our hazard evaluation of the ingredient (s) under OSHA's llazard Communication Rule, 29 CFR 1910.1200 has found none of the ingredient (c) hazardous.
SECTION 3 1UsZARD IDENTIFICATION EMERG2NCY OVERVIEW:
CAUTION: May cause irritation to skin and eyes. Avoid contact with skin, eyes, and clothing. Do not take internally.
4 .
' Empty containero may contain residual product. Do not reuce container unleon properly reconditioned.
PRIMARY KCUTE(S) OF EXPOSURE: Eye, Skin EYE CONTACTr Can cause mild, ahort-lasting irritation.
SKIN CONTACT: Can cause mild, ahort-laating 3rritation.
SYMPTOMS OF EXPOSURE: A review of available data does not identify any symptoms from exposure not previously mentioned.
AGGRAVATION OF EXISTING CONDITIONS: A review of ava!,lable data does not identity any worocaing of existing conditions.
SECTION 4 FIRST AID INFORMATION EYES: Immediately flush with water for at least 15 minutes while holding eyelids open. Call a physician at once.
SKIN: Wash thoroughly with noap and rince with water. Call a physician.
INGESTION: Do not indr vomiting. Give water. Call a physician.
INHALATION: Remove to f 1 air. Treat symptoms. Call a physician.
NOTE TO PHYSICIAN: Daned on the individual reactions of the patient, the
,, physician's judgment should be used to control symptoms and clinical condition.
, $?
CAUTION: If unconscious, having trouble breathing or in convulsions, PAGE 1 OF 0 N ALCO CHUMICAL COMPJ6NY ONE NALCO CENTER
_. . - - _ _ _ - - _ _ _ - _ _ _ _ MATERIAL SAFETY DATKSHEET - *
- ].
- PRODUCT ,
O DYlJACOOL 1385 SCALf IlillIl>1ron i N ALC O .
Emergency Telephone Number .
^
Medical (000)462 5370 (24 houts) (BOO)1 M ALEFIT
~
SECTIOli 4 FIRST AID Il1FORl4ATIOli ( OONTINUED )
do not induce vomiting or give water.
SECTIOli L FIRE FIGitTIllG FIASil PolliT: lione (014C0) AST!4 D 93 EXTI).JUISilll1G I4EDI A: 110t applicable UliUSUAL FIRE IdiD EXP14SIOff IIAZARD: 110t applicable SECTIO 11 6 ACCIDENTAL RELEASE I4EASURES IN CASE OF TRA!1SPORTATIOli ACCIDE11TS, CALL TifE FOLLOWING 24-IlOUR TELEPilOllE ITUl4BER (800) I-M ALERT or (0001 462-5378.
SPILL CONTROL AND RECOVERY:
Small liquid spil10: Contain with absorbent material, such as clay, coil or '.
any commercially available absorbent. Shovel reclaimed liquid and absorbent into recovery or salvage drums for disposai. Refer to CERCLA in Section 15.
Large liquid spills: Dike to prevent further movement and reclaim into recovery or salvage drums or tank truck for disposal. Refer to CERCLA in Section 15.
SECTION 7 NANDLI!1G AND STORAGE Storage : Ecep container closed when not in use.
SECTION 0 EXPOSUKT. CO'lTROLS/ PERSONAL PROTECTION RESPIRATORY PROTECTIO!1: Resperatory protection is not norn. ally needed.
For latge spills, entry into lat, anke, vessels or enclosed small spaces with inadequate ventilation, .'sitive pressure, self-contained breathing apparatus in recommended.
VENTILATION: General ventilation 10 recommended.
PROTECTIVE EQUIPMENT: Wear impermeable gloves, boots, apron and a face shield with chemical splash goggles. Examples of impermeable gloveo available on the -
market are neoprene, nitrile, PVC, natural tvbter, viton and butyl (compatibility studies have not been performed) . A full slicker suit to h
PAGE 2 OF 8 NALCO CHEMICAL COMPANY ONE NALCO CENTER
- NAPERVILLE. ILLINOLS DOSG3-1100 AtEA CL'X13051000
, MATERIAL SAFETY DATA SHEET Pnonuc1 DYliACOOI.13 8 5 UCALl; IlilllillTOR N ALC D Emergency Telephone Number Medical (800) 402 5374 (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) (800)1 M ALE FIT SECTION D EXPOSURE CONTROLS /Pl:RSollAL l'ROTECTION ( CONTINUED )
tecommended if Stroca exponure in possible.
The availability of an eye wach fountain and nafety chower in recommended.
If clothirag la contan.inated, remove clothing and thoroughly wach the affected area. Launder contaminated clothing before reune.
t HUMAll EXPOSURE CIIARACTERIZATION: Based on Halco's recommended product application and our recommended pernonal protective equipment, the potential human exposure ist MODEPJsTE.
4 SECTION 9 PilYSICAL AND CllEMICAL PROPERTIES COLOR: Clear to hazy yellow FORM: Liquid ODOR: Slight organic DENSITY: 11.2-11.5 lba/ gal.
SOLUDILITY IN WATER: Completely SPECIFIC GRAVITY: 1.34-1.30 0 72 Degrec.) F ASTM D-1298
, pil (NEAT) - 3.0-4.3 ASTM E-70 VISCOSITY: 24 cpc @ 72 Degreen F ASTM D-2'l8 3 FREEZE POINT: 15 Degreco F ASTM D-1177 FIJsSil POIliT None (PMCC) ASTM D-03 NOTE: These physical propertica are typical values for this product.
SECTION 10 STABILITY AND REACTIVITY INCOMPATIBILITY: Avoid contact with strong oxidizers (eg. chlorine, peroxides, chromaton, nitric acid, perchloraten, concentrated c. ygen, permanganates) which can generate heat, fires, explosions and the release of toxic fumes.
Tl!ERMAL DECOMPOSI'! JN PRODUCTS : In the event of combuction CO, CO2 may be formed. Do not breathe smoke or fumes. Wear cuitable protective equipment.
SECTION 11 TOXICOLOGICAL II; FORMATION TOXICITY STUDIES: No toxicity ntudien have been conducted on this product.
IlUMAN llAZARD CllARACTERIZATION: Based on our hazard characterization, the potential human hazard in: LOW SECTION 12 ECOLOGICAL INFORMATION 4
us, AQUATIC DATA:
PAGE 3 OF 8 N ALCO CHEMICAL COMPANY ONE NALCO CENTEn
- NAPERVILLE. ILLINOIS GOSG311DO AHt' A tiTO;E2-10CIl
,' MATERIAL SAFETY DATA SHEET ,
PRODUCT
- DYNACOOL 138d SCALE IltllIDIton I
1
, N ALC O I Emergency Telephone Nuo %er l Medical (000) 402 3378(24 nours) (800)l M ALERT
~ ( CONTINUED )
SECTIO!1 12 1:COLCGICAL I!3 FORMATION f
i Recultn below are baced on the product. l I
96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> static acute LC50 to Rainbow Trout = Greater than 1,000 mg/L I
, 96 hour no observed effect concentration is 1,000 mg/L based on no mortality or abnormal effects.
TOXICITY PJsTI!iG: Essentially non-toxic 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> static acute LC50 to Fathead Minnow = Greater thand 1,000 n,g/L 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> no observed effect concentration is 1,000 mg/L baned on no mortality
! or abnoraal offects.
l TOXICITY RATI!1G Essentially non-toxic i
48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> static acute LC50 to Daphnia magna 6 797 mg/L 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> no observed effect concentration is 400 mg/L based on no mortality c-l
! abnormal offects.
i
'mXICITY RATING: Slightly toxic
-96 hour etatic acute LC50 to Shrimp (Mysidopsis bahia) = .J8 mg/L 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> no observed effect concentrat on is 158 mg/L based on no mortality or abnormal etiects.
TOXICITY RATIl1G: Slightly toxie 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> static acute LC50 to Silversides (Menidia beryllina) = Greater than 1,000 mg/L 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> no observed effect concentration is 1,000 mg/L based on no mortality or abnormal effects TOXICITY eUsTING: Essentially non-toxic If released into the environment, see CERCLA in Section 15.
EINIRONMENTAL liAZARD AND EXPOSURE CHARACTERIZATION: Based on our llazard ,
Characterization, the potential environmental hazard is: LOW. /_
Based on Unico's recommended product application and the product's D PAGE 4 OF 0 N ALCO CHEMICAL COMPANY ONE NALCO CENT ER
- NAPERVILLE. ILLINOIS 605G3-11GO Af ac A OM 30'310CD
o MATERIAL SAFETY DATA SHEET l'ROlJUC'l DYllACOOL I30t SCALU IllllI DITok N A LC O Tmcrut ncy Telephone Numt>er Medical (800) 402 6378 (24 liou r s.) (600)l M ALEHT SI:CTION 12 ECO!/>GICAL IlfrokMATIO!1 ( CollTI!JUED )
characteristico, t het potential environmental exposure ic: III Gil .
SECTION 13 DISPOSAL CollSIDERATIONS DISPOSAbt If thiu product becomen a waste it doen not meet the criteria of a hazardoun wante an defined under the Renource Conservatfor, and Recovery Act (1<CRA) 40 CFR 261, nince it does not have t.he characteristien of Subpart C, nor in it linted under Subpart D.
An a rion hazardoun liquid wante, it should be colidified with utabilizing agento (nuch ao nand, fly anh, or cement) co that no free liquid remaina before dicpocal to an industrial wante landfill. A non hazardoua liquid waste can also be incinerat.ed in accordance with local, atate, and federal regulations.
' SECTIOli 14 TRANSPORTATIO!4 INFORMATION PROPER S!!IPPIllG 11Al4E/IIAZARD CIASS MAY VARY DY PACKAGT!!G, PROPERTI2S, AND MODE OF TidsNSPORTATIOll. TYPICAL PROPhu si!IPPI!JG IUJ4ES FOR Ti!IS PRODUCT ARE:
ALL TRANSPORTATIO!1 MODES : PRODUCT IS NOT REGUIATED DURING T.JsNSPORTATION S EC TI Oli ) $ REGUIATORY INFORMATION The f ollowing regulat.ionn apply to thin product.
FEDERAL REGUIATIO!1S :
OSIIA llAZARD COMMUNICATION RULE, 29 CFR 1910.1200:
Based on our hazard evaluation, none of the ingrediento in this product are hazardoun.
CERCIA/SUPERFUND, 40 CFR 117, 302:
Notification of spillu of thin product in not required.
SARA /SUPERFUND AMENDMENTS AND REAUT1!ORIZATION ACT OF 1986 (TITLE III) - SECTIONS 302, 311, 312 AND 313:
gu;SECTION 302 -
EXTREMELY llAZARDOUJ SUBSTANCES (4 0 CFR 31%) :
'"' This product doen not contain ingredienta listed in Appendix A and B an an PAGE 5 OF 8 N ALCO CHUMICAL COMPANY ONE NALCO CENilm
- NAPENVILLE. ILLINOlG GON331100 Allt A (170 323101)
1 MATERI AL SAFETY DATA SHEET PHODUCl -
DYNArw h 138', crA1.1; 1!Ull n 1 TOl' l N ALC O (mergency Telershone Number Medical (BOO) 402 5370 (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) (800)l M ALEHT Sil'T10!J IS Pl:GULAToltY 11110k MAT IO!J ( cour j rgul;p }
Ex.t r emely liaran doun ';ubot ance SI:CTI O!!S 31) and 31/ MATEH1/sb SAFETY DATA SilEl:T PLOUlkEMENTS (40 CFR 370) :
Our harard evaluat ton han f ound that t hin pr oduct in not hazardoun under 29 CI'R 1910.1200.
' Mde s SAPA 311 and 312, the UI'A han entabliohed thr eshold quantition f or the inporting of harandoun chemicain. The cur r ent threnholdn are: SOO poundo or the t hrenhold platining quantity (TPO) , whichever in lower, for extremely hazardoun nubntancen and 10,000 poundu for all other hazardoua chemicain.
SI'CTI ON 313 - LIST OF TOXIC CitEMICALS (40 CFit 372):
Thin ptoduct doen not contain ingrediento on the Lint of Toxic Chemicala.
TOXIC SUBSTA11CES CollTPOL ACT (TSCA) :
~~he chemical ingrediento in this product are on the O(b) Inventory 1.iut (4 0 CFP 710) , ,
PESOUI'CI: CollDI:PVATIOli AND PECOVERY ACT (HCHA), 40 CFR 261 SUbi'AkT C l. D:
Connult Stiction 13 f or RCPA clannification.
FEDERAL WATFR POL 1tJTIOl1 CONTROL ACT, C1.EAN WATER ACT, 40 CFR 401.1L/
formerly Sec. 307, 40 CPR 116/formerly Sec. 311:
lione of the ingredienta are a;pecifically linted.
C1.EAIJ AIR ACT, Sec, 111 (40 CFR 60) , Sec. 112 (40 CFR 61, 1990 Amendmento),
Sec. Gil (40 CPR U2, CIJsSS I and 11 Ozone deplet.ing nubstancen):
Thin product doen not contain ingrediento covered by the Clean Air Act.
STATI: kEGULATIONS:
CALIFOk111A IROPOSIT1011 6S:
Thin psoduct doen not. contain any chemicaln which require warning under California Proponition 65.
MICll1GAN CRITICAL MATERIALS:
This rioduct does not contain ingredient.n linted on t.he Michigan critical Materialu llegiater.
STATE RIGitT TO FNOW LAWS Thiu product doen not contain ingr edient o linted by St ate Right To rn ow Lawn.
INTERNATIONAL REGU1JsTIONS : -3 Vf PAGE 6 OF h N ALCO CHtIMIC AL COMPANY ONii NALCO Ct:Nitii4
- NAPlifiVILLE, ILLINCIG OOGG311 t>O Af M;A t r O Fhi(I I)
~ . . . _ . . _ _ _
.s. .
MATERIAL SAFETY DATA SHEET PRODUCT DYNACOOL 1385 SCALE INHIBITOR N A i_ C O Emergency Telephone Number Medical (80m 462 5378 (24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) (800)I M ALERT ST;CTIO! 15 REGULATOE( INFORMATION
( COtrIINUED ) _
This is not a WHMIS controlled product under The House of Commons of Canada Hill C-70.
SECTION 16 OTHER INFORMATION Nalco internal number F103712/F104323 SECTION 17 RISK CHARACTERIZATION Due to our commitment to Product Stewa.rdship, we have evalaated the numan and environmental hazards and exposurea of this product. Baaed on cur recommended use of th! product, we have characterized the product 'a general risk. This informati n t,hould provide assistance for your own risk management practices. We have evaluated our product's risk as fallows:
The human risk is LOM.
The environmental risk is: LOW.
Any use inconsistent with Nalr o's recommendations may af fect (. 1sk characterization. Our sales representative will assist you to determine if your product application is consistent with our recommendations. Together we can implement an appropriat e risk management pr ocess.
This p: oduct material safety data sheet provide .altn and safety info.mation. The product is to be used in applic-tions consistent wit.i.
our product literature. Individuals handling this product should be inforr.ed of the recomniended safety precautions and should have acce to this information. For any other usas, exposures should be evalt <
co that appropriate handling practices and training programs can be established to insure safe workplace operations. Please consult yout loca] sales representative for any turther information.
SECTION 18 REFFRENCES Threahold Limit Values for Chemical Substances and Physical Agents and I'oloolcal Exposure hdiccu, AmericMn Conference of Governmental Industrial Hygienista, OH.
Hazardous Substances Data Bank, Natic: .] Library of Medicine, Bethesda,
, Maryland (CD-ROM version), Micromedex, Inc., Englewood, CO.
(# Q IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Man, Geneva: World Health Organizatica, International Agency for PAGE 7 OF 8 NALC"3 CHEMICAL COMPANY ONE NALCO CEN7 ER
- NAPERVILLE. ILLINQls 60563--1198 AAEA G3C13OS 1000
MATERI AL SAFETY DATA SHEET PRODUCT -
j DYNACOOL 1385 SCALE INHIBITOR '%
N ALC O Emergancy Telephone Number Medical (800) 462 5378(24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) (800) 1 M ALERT SECTION 18 REFERENCES ( CONTINUED )
Research on Cancer.
Integrated Pisk Information System, U.S. Environmental Protection Ageracy, Washington, D.C. (CD-ROM version), Micromedex, Inc., Englewood, CO.
Annual Report on Carcinogens, National Toxicology Program, U.S. Department of llealth and lluman Services, Public Health Service.
Title 29 Code of Federal Regulations, Part 1920, Subpart Z, Toxic and llazardous Substances, Occupational Safety and Health Administration (OSHA).
Registry of Toxic Effects of Chemical Substances, National Institute for Occupational Saf ety and 11ealth, Cincinnati, Ohio (CD-ROM version),
Micromedex, Inc., Englewood, CO.
Shepard's Catalog of Teratogenic Agents (CD-ROM version),
5 Micromedex, Inc., Englawood, CO. , ,
)
Suspect Chemicals Sourcebook (a guide to industrial chemicals cov ~'n under major regulatory and advisory programs) , Roytech Publicat.
(a nivision of Ariel Corporation), Bethesda, MD.
The Teratogen Information System, University of Washington, Seattle, Washington (CD-ROM version), Micromedex, 'nc . , Englewood, C' PREPARED BY: William S. Utley, PhD., DABT, Manager, Freduct- Safety DATE CHANGED: 08/25/97 DATE l'RIN'1ED : 11/06/97 PAGE 8 OF 8 N ALCO CHEMICAL COMPANY ONE N4.LCO CENTER
- NAPERVILLE, ILLINC O 60563-1198 AAEA 63CF335-1000
. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .