ABB RANDALL

ABU DHABI OIL COMPANY

AEC WEST, LTD.

AKER OMEGA ENGINEERING

ALBERTA NATURAL GAS COMPANY

ALL AMERICAN PIPELINE

ALLIED CHEMICAL CORPORATION

ALLIED MATERIALS CORPORATION

ALLIED REFINING COMPANY

ALTANA PETROLEUM COMPANY

ALYESKA PIPELINE

AMERADA HESS OIL CORPORATION

AMERADA HESS OIL CORPORATION, VIRGIN ISLANDS

AMERICAN PETROFINA

AMERON ENGINEERING

AMOCO

AMOCO CANADA PETROLEUM COMPANY

AMOCO CHEMICAL

AMOCO PRODUCTION

ANADARKO PRODUCTION COMPANY

ANCO MANUFACTURING & SUPPLY

ANGLO ECUADORIAN OIL COMPANY

ANIC

ANR PIPELINE COMPANY

APCO OIL CORPORATION

APEX OIL

ARABIAN-AMERICAN OIL COMPANY

ARAMCO

ARCO

ARCO ALASKA, INC.

ARKLA CHEMICAL CORPORATION

ARTHUR G. McKEE & COMPANY

ASAMERA OVERSEAS, LTD.

ASHLAND OIL, INC.

ASHLAND PETROLEUM COMPANY

ASTRA, S.A.

ATLANTIA CORPORATION

ATLANTIC REFINING COMPANY

ATLANTIC RICHFIELD CORPORATION

ATLANTIC TERMINAL CORPORATION

ATLAS PROCESSING COMPANY

AUSTIN-RANKIN ENGINEERING

AUSTRALIAN AMERICAN ENGINEERING COMPANY LTD.

AVISTA RESOURCES

BADGER ENGINEERING

BANGLEDESH GAS FIELDS COMPANY, LTD.

BARIVEN CORPORATION

BASIC SYSTEMS

BAY, LTD.

BDR

BECHTEL ENGINEERING

BEELINE REFINING COMPANY

BELL OIL & GAS COMPANY

BELRIDGE OIL COMPANY

BHP BILLITON

BIG WEST OIL COMPANY

BLACK, SIVALLS & BRYSON ENGINEERING

BLAW-KNOX ENGINEERING

BLOOMFIELD REFINING

BRECKENRIDGE GAS

BRITISH PETROLEUM EXPLORATION

BRITISH-BORNEO EXPLORATION

BROWN & ROOT DEVELOPMENT COMPANY

BRUSH WELLMAN

BUFETE

BURLINGTON ELECRIC

C.W. NOFSINGER COMPANY

CABINDA GULF OIL COMPANY

CABOT CARBON COMPANY

CABOT CORPORATION

CAIN CHEMICAL COMPANY

CALTEX

CANADIAN INDUSTRIAL GAS & OIL

CANADIAN PETROFINA, LTD.

CARIBBEAN UTILITIES COMPANY

CBS ENGINEERING

C-E NATCO, INC.

CE POWER SYSTEMS

CE RANDALL

CELANESE CHEMICAL COMPANY

CENEX

CHANNEL SHIPYARD, INC.

CHAS. PFIZER & COMPANY

CH2MHILL

CHEVRON OIL COMPANY

CHEVRON STANDARD, LTD.

CHILES OFFSHORE CORPORATION

CHINA NATIONAL TECHNICAL IMPORT CORPORATION

CHINESE PETROLEUM CORPORATION

CIT-CON OIL CORPORATION

CITIES SERVICE OIL COMPANY

CITIES SERVICE PETROLEUM COMPANY

CMI

COAST PETROCHEM EQUIPMENT

COASTAL JAVELINA

COASTAL STATES GAS COMPANY

COASTAL STATES REFINING COMPANY

COLORADO INTERSTATE GAS

COLT ENGINEERING

COMMERCIAL SOLVENTS CORPORATION

COMPANIA de HIDROGENO de TALCAHUANO (CHT)

CONOCO

CONSOLIDATION COAL COMPANY

CONTINENTAL OIL COMPANY

COOPERATIVE REFINERY ASSOCIATION

COSDEN OIL & CHEMICAL CORPORATION

CRA

CREST ENGINEERING

CROWLEY TAR PRODUCTS COMPANY

CRYSTAL OIL COMPANY

DARENCO

DELHI-TAYLOR OIL CORPORATION

DELTA ENGINEERING

DELTA PACIFIC

DELTA REFINING

DELTA TANK

DERBY REFINING COMPANY

DIAMOND SHAMROCK

DOME PETROLEUM

DORCHESTER GAS PRODUCING COMPANY

DOUGLAS OIL

DOW CHEMICAL (HONG KONG)

DOW CHEMICAL (USA)

DRESSER ENGINEERING

DUBAI NATURAL GAS COMPANY

DUKE FIELD SERVICES

DURAN

DUTCH OIL COMPANY

E & L ENGINEERING

E.I. DU PONT

E.I. DU PONT DE NEMOURS & COMPANY

EASTMAN CHEMICAL COMPANY

ECO PETROLEUM, INC.

ECOPETROL

EDG GROUP

EDGINGTON OIL COMPANY

EGYPTIAN GENERAL PETROLEUM COMPANY

EGYPTIAN NATURAL GAS COMPANY

EHRART & ASSOCIATES

EL PASO NATURAL GAS

EL PASO REFINING

ELGAS

ELLERSLY CORPORATION

EMERY INDUSTRIES, LTD.

EMI

EMPIRE STATE OIL COMPANY

EMPRESS LIQUIDS

ENCANA ENGERGY RESOURCES

ENDEVCO

ENERGY RESEARCH & DEVELOPMENT ADMIN.

ENGINEERING TECHNOLOGY INC. (ETI)

ENGINEERING, PROCUREMENT & CONSTRUCTION, INC.

ENPPI

ENSA

ENSERCH

ENTERPRISE PRODUCTS COMPANY

EPCON

EQUILON PIPELINE

ERGON, INC.

ESCHER HOLLAND

ESSAR OIL, LTD.

ESSO RESOURCES CANADA, LTD.

EVERGREEN NYLON RECYCLING

EXXON

FARMERS UNION CENTRAL EXCHANGE

FINA

FIRST CHEMICAL

FISH ENGINEERING

FLETCHER OIL & REFINING

FLORIDA RESEARCH & DEVELOPMENT

FLUOR DANIEL ENGINEERING

FLUOR ENGINEERING

FLYING 'J' INC.

FOOR ENGINEERING

FORD, BACON & DAVIS ENGINEERING

FORMOSA PLASTICS

FORMOSAN UNION CHEMICAL

FRITO-LAY, INC.

FRONTIER REFINING COMPANY

FUEL CELL ENERGY

GAS DEL ESTADO

GAS PROCESSORS, INC.

GASCO

GASTECH

GEA AIREXCHANGERS

GENERAL ELECTRIC

GEO

GEORGIA PACIFIC

GETTY OIL COMPANY

GIANT REFINING

GIBSON PETROLEUM COMPANY, LTD.

GILLETTE SYNTHETIC COAL

GLADIEUX REFINING

GLITSCH, INC.

GOLIAD CORPORATION

GOOD HOPE REFINERIES, INC.

GRAFF ENGINEERING

GREAT WALL ENGINEERING

GREATER WINNIPEG GAS COMPANY

GUAM OIL & REFINING COMPANY

GULF CANADA RESOURCES, LTD.

GULF ENERGY PROCESSING CORPORATION

GULF GAS COMPANY

GULF OIL CHEMICAL

GULF OIL COMPANY, LTD.

GULF OIL CORPORATION

GUPCO

HAMILTON ENERGY

HANOVER-RUSSELL COMPANY

HAWAIIAN INDEPENDENT REFINERY

HEAT & CONTROL, INC.

HENKEL CANADA, LTD.

HENLEY ENGINEERING

HERCULES POWDER COMPANY

HEYL & PATTERSON ENGINEERING

HITACHI ZOSEN

HOECHST CHEMICAL GROUP, INC.

HOFFMAN LaROCHE

HOME OIL COMPANY

HO-TUNG CHEMICAL COMPANY

HOUSTON NATURAL GAS COMPANY

HOVENSA

HOWE-BAKER ENGINEERING

HOYU ENERGY

HUDSON ENGINEERING

HUDSONS BAY OIL & GAS COMPANY

HUGHES ENGINEERING

HUMBLE OIL & REFINING COMPANY

HUNT OIL COMPANY

HUNTSMAN CHEMICAL

HUSKY OIL COMPANY

HUXTABLE HAMMOND ENGINEERING

HYUNDAI HEAVY INDUSTRIES COMPANY, INC.

ILLINOIS MINERALS COMPANY

IMC CHEMICALS

IMPERIAL OIL COMPANY

INDUSTRIAL GAS CORPORATION

INDUSTRIAS RESISTOL

INDUSTRIE MECCENICHE SCARDELLATO (IMS)

INTE FINANCIAL

INTERNATIONAL GAS ENGINEERING, LTD.

INTEVEP

IRAN-PAN AMERICAN OIL COMPANY

J.L. DAVIS

JAMES UNITED STEEL, LTD.

JANNAH HUNT OIL COMPANY

JAPAN PETROLEUM COMPANY

JAPAN SYNTHETIC RUBBER COMPANY

JOHN DEERE CHEMICAL COMPANY

JORD ENGINEERING

KAIGNIN ENGINEERING

KANEB PIPELINE

KERNRIDGE OIL

KERR McGEE CHEMICAL, LLC

KERR-McGEE OIL INDUSTRIES

KIKKOMAN FOODS, INC.

KOBE STEEL, LTD.

KOCH HYDROCARBON IND.

KOCH INDUSTRIES

KOCH REFINING

KTI ENGINEERING

KTI LAS PROCESSORS

LA GLORIA OIL & GAS COMPANY

LADD PETROLEUM COMPANY

LAGOVEN, S.A.

LAJET, INC.

LAMONT GAS PRODUCTS

LANCASTER STEEL

LaROUCH

LG ENGINEERING

LG-CALTEX GAS COMPANY

LIG LIQUIDS

LINDE

LITTLE AMERICAN REFINING COMPANY

LITWIN ENGINEERS & CONSTRUCTION

LOCKWOOD GREEN

LONGVIEW REFINING COMPANY

LOTEPRO

LOUISIANA LAND & EXPLORATION

LUCKY ENGINEERING

LUMMUS ENGINEERING

LUZ

M.W. KELLOGG

MAERSK OIL QATAR

MALONEY-CRAWFORD

MANNESMANN ANLAGENBAU AB

MAPCO

MARATHON OIL COMPANY

MARATHON PETROLEUM

MARKWEST HYDROCARBON

MARLEX OIL & REFINING

MARSULEX INC.

MATADOR PIPELINE

MAXUS CORPORATION

MAXUS SOUTHEAST SUMATRA

M-C POWER CORPORATION

McDERMOTT

McGILL, INC.

McKEE ENGINEERING

McNEIL POWER STATION

McWOOD CORPORATION

MENEVEN

MESA

MHG INTERNATIONAL

MICHIGAN CONSOLIDATED GAS

MID AMERICA PIPELINE COMPANY

MITCHELL GAS SERVICES

MITSUBISHI

MOBIL EQUATORIAL GIUNEA

MOBIL INTERNATIONAL OIL COMPANY

MOBIL OIL CANADA, LTD.

MOBIL OIL COMPANY

MOBLEY ENVIRONMENTAL

MON-MAX ENGINEERING

MONSANTO CHEMICAL COMPANY

MURPHY OIL USA, INC.

MUSTANG ENGINEERING

NANHAI WEST OIL COMPANYPASCO INCORPORATED

NARCO

NATIONAL COOPERATIVE REFINERY ASSOCIATION

NATIONAL IRANIAN OIL COMPANY

NATIONAL TANK COMPANY

NATURAL GAS PIPELINE OF AMERICA

NERGAS CORPORATION

NEVILLE CHEMICAL COMPANY

NEWHALL REFINING

NIIGATA ENGINEERING

NKK

NOELL INDUSTRIES

NOFSINGER -NOTTBERG COMPANY

NORDIC COGEN

NORTH AMERICAN TURBINE CORPORATION

NORTH OKEMAH GASOLINE PLANT

NORTHERN NATURAL GAS COMPANY

NORTHWEST PIPELINE CORPORATION

NOUVELLES APPLICATIONS TECHNOLOGIES

NOVA GAS TRANSMISSION

NOVAGAS CLEARINGHOUSE, LTD.

NYE ENGINEERING

OASIS OIL COMPANY

OFFICE OF COAL RESEARCH

OIL & NATURAL GAS COMMISSION OF INDIA

OIL REFINERIES ADMINISTRATION

OLDS GAS, LTD.

OLSEN COMPANY

OMAN-PETROLEUM DEVELOPMENT

ONYX ENGINEERING

ORE-IDA, INC.

ORIENTAL ELEPHANT

ORION REFINING CORPORATION

ORTLOFF CORPORATION

OXID, INC.

OXOCHEM ENTERPRISE

PACIFIC ALASKA LNG

PAKISTAN PETROLEUM

PAN AMERICAN PETROLEUM CORPORATION

PAN CANADIAN

PARAMOUNT PETROLEUM

PARSONS ENGINEERING

PCC

PEMEX

PENNSYLVANIA REFINING COMPANY

PENNZOIL UNITED, INC.

PERTAMINA

PETRO STAR

PETROBAR

PETROBEL

PETROBRAS

PETROFINA CANADA, LTD.

PETROLANE INCORPORATED

PETROLEOS DE VENEZUELA

PETROLEOS MEXICANOS

PETROLEOS PARAGUAYOS

PETROLEUM AUTHORITY OF THAILAND

PETROLEUM PLANT TECHNOLOGIES

PETROLITE CORPORATION

PETROVIETNAM

PHEONIX CONSTRUCTORS

PHILADELPHIA GAS

PHILLIPS PETROLEUM COMPANY

PIPELINE TECHNOLOGIES

PLACID OIL COMPANY

PLAINS ENGINEERING

PMI

PONA ENGINEERING

POWERINE OIL COMPANY

PPG INDUSTRIES, INC.

PRATT & WHITNEY ENGINEERING

PREMIER PETRO-CHEMICAL COMPANY

PRIDE REFINING COMPANY

PRITCHARD ENGINEERING

PROCESS TECHNOLOGIES INTERNATIONAL

PROCON ENGINEERING

PRO-QUIP

PROVIDENT RESOURCES, LTD.

PROVO GAS PRODUCERS, LTD.

PSB

PT McDERMOTT ENGINEERING

PUBLIC SERVICES ELECTRIC & GAS

PURE OIL COMPANY

QUAKER STATE

QUALCOMM

QUANTUM CHEMICAL

QUEST

R.L. FRAILEY COMPANY

RALPH M. PARSONS ENGINEERING

RANDALL ENGINEERING

REFINERIA DE PETROLEOS MANGUINHOS SA

REFINERIA PARAGUAYA, S.A.

REFINING ASSOCIATES, INC.

RENAISSANCE ENERGY

REXENE

RHODIACETA

ROCK ISLAND OIL COMPANY

ROCK ISLAND REFINING

ROUNDS & STEWART NATURAL GASOLINE COMPANY

SANDWELL ENGINEERING

S.I.P. ENGINEERING

SAMEDAN POWER

SAMSUNG ENGINEERING

SANDIA

SAUYER TANK

SCHILLER ENTERPRISES

SCOTTISH ENGINEERING

SEBLIMA

SEECO PETROCHEMICAL

SELAS**

SEMBAWANG

SEMINOLE PIPELINE COMPANY

SESLER & CAFFEY ENGINEERING

SHELL

SHELL CALIFORNIA PRODUCTION, INC.

SHELL CANADA RESOURCES, LTD.

SHELL CHEMICAL COMPANY

SHELL OIL COMPANY

SIBP

SID RICHARDSON CARBON COMPANY

SID RICHARDSON GASOLINE COMPANY

SIGNAL OIL & GAS COMPANY

SINCLAIR MEDITERRANEAN PETROLEUM

SINCLAIR OIL & GAS

SIP ENGINEERING

SIREX, LTD.

SK GAS COMPANY, LTD.

SKELLY OIL COMPANY

SNYDER OIL COMPANY

SOCALTRA

SOHIO CHEMICAL COMPANY

SOHIO PETROLEUM

SOLAR TURBINES, INC.

SOLUTIA, INC.

SOUTH HAMPTON COMPANY

SOUTHWEST ENGINEERING

SOUTHWEST RESEARCH INSTITUTE

SOUTHWESTERN OIL & REFINING

SPRAGUE OIL COMPANY

SRI-U-THONG

STANDARD OIL COMPANY

STEARNS CATALYTIC

STEARNS-ROGER ENGINEERING

STERLING CHEMICAL COMPANY

STEUART PETROLEUM COMPANY

STONE & WEBSTER ENGINEERING

SUN OIL

SUN REFINING & MARKETING

SUNRAY MID-CONTINENT OIL COMPANY

SUNTECH, INC.

SUPERIOR OIL COMPANY

T.H. RUSSELL COMPANY

TAIWAN FERTILIZER COMPANY

TATHAM OFFSHORE

TECHNIP

TENNESSEE GAS TRANSMISSION COMPANY

TESORO PETROLEUM COMPANY

TEXACO CANADA RESOURCES, LTD.

TEXACO, INC.

TEXAS EASTMAN

TEXAS INSTRUMENTS

TEXAS OIL & GAS COMPANY

THAI ASPHALT COMPANY

TIDEWATER OIL COMPANY

TOROMOUNT

TOSCO CORPORATION

TOTAL PETROLEUM COMPANY

TRANSAMERICAN REFINING CORPORATION

TRANSCO EXPLORATION

TRANSCONTINENTAL GAS PIPELINE

TREND CONSTRUCTION

TRI SERVICE DRILLING COMPANY

TRUE OIL COMPANY

T-THERMAL

TURBO POWER MARINE SYSTEMS

TURBO RESOURCES, LTD.

U.S. ARDEC

U.S.A. PETROCHEM CORPORATION

ULTRAMAR, INC.

UNICAL THAILAND, LTD.

UNION OIL COMPANY

UNION OIL COMPANY OF CALIFORNIA

UNION TEXAS NATURAL GAS CORPORATION

UNITED STATES AIR FORCE

UNITED STATES NAVY

UNIVERSAL MAINTENANCE

UOP COMPANY

UOP PROCESS DIVISION

VALERO HYDROCARBONS

VANSON ENGINEERING

VENETANK

VICKERS PETROLEUM CORPORATION

VISTRON CORPORATION

VITOK ENGINEERING

VNT INDUSTRIES

WARNER HENKE ENGINEERING

WARREN PETROLEUM COMPANY

WASHINGTON GROUP

WERTHERBY ENGINEERING

WESTERN DESERT OPERATING COMPANY

WESTERN ENERGY

WESTERN GAS RESOURCES

WESTERN LNG TERMINAL COMPANY

WESTFIELD ENGINEERING

WESTINGHOUSE

WILLIAMS BROTHERS ENGINEERING

WILLIAMS ENERGY

WILLIAMS FIELD SERVICES

WITCO CHEMICAL CORPORATION

WOODS PETROLEUM

WORLEY ENGINEERING

WRIGHT TECHNIP, LTD.

YACIMENTOS PETROLIFEROS FISCALES

YOSU ENERGY

YUKONG, LTD.