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A
ABB LUMMUS GLOBAL B.V.
ABB RANDALL
ABU DHABI OIL COMPANY
AEC WEST, LTD.
AETHON ENERGY UNITED LP
AGL RESOURCES
AGUA REFINERY LTD
AKER OMEGA ENGINEERING
ALBERTA NATURAL GAS COMPANY
ALL AMERICAN PIPELINE
ALLIANCE MAGNESIUM METALLURGY INC.
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 PETROLEUM CORP.
ANADARKO PRODUCTION COMPANY
ANCO MANUFACTURING & SUPPLY
ANGLO ECUADORIAN OIL COMPANY
ANIC
ANR PIPELINE COMPANY
APCO OIL CORPORATION
APEX OIL
ARABIAN COMPANY FOR OIL & DERIVATIVES
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.
B
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 (TRINIDAD-2C) LTD.
BIG WEST OIL COMPANY
BLACK, SIVALLS & BRYSON ENGINEERING
BLAW-KNOX ENGINEERING
BLOOMFIELD REFINING
BRAVO ENERGY MEXICO S.R.L.
BRECKENRIDGE GAS
BRITISH PETROLEUM EXPLORATION
BRITISH-BORNEO EXPLORATION
BROWN & ROOT DEVELOPMENT COMPANY
BRUSH WELLMAN
BUFETE
C
C.W. NOFSINGER COMPANY
CABINDA GULF OIL COMPANY
CABOT CARBON COMPANY
CABOT CHINA LIMITED
CABOT CORPORATION
CAIN CHEMICAL COMPANY
CALTEX
CALUMET SUPERIOR, LLC
CANADIAN INDUSTRIAL GAS & OIL
CANADIAN NATURAL RESOURCES LTD.
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
CHEMISA S.A. DE C.V.
CHEMOURS COMPANY
CHEMOURS COMPANY MEXICANA DE R.L. DE C.V.
CHEVRON OIL COMPANY
CHEVRON STANDARD, LTD.
CHILES OFFSHORE CORPORATION
CHINA NATIONAL TECHNICAL IMPORT CORPORATION
CHINESE PETROLEUM CORPORATION
CHS, INC.
CIT-CON OIL CORPORATION
CITIES SERVICE OIL COMPANY
CITIES SERVICE PETROLEUM COMPANY
CLARIANT CORPORATION
CLARIANT SPECIALTY CHEMICALS
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
CONOCOPHILLIPS CANADA
CONSOLIDATION COAL COMPANY
CONTINENTAL OIL COMPANY
COOPERATIVE REFINERY ASSOCIATION
COSDEN OIL & CHEMICAL CORPORATION
COUNTRYMARK REFINING AND LOGISTICS, LLC
CRA
CREST ENGINEERING
CROWLEY TAR PRODUCTS COMPANY
CRYSTAL OIL COMPANY
D
DAK AMERICAS LLC
DARENCO
DCP MIDSTREAM
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
DUTCH OIL COMPANY
E
E1 CORPORATION
E & L ENGINEERING
E.I. DU PONT
E.I. DU PONT DE NEMOURS & COMPANY
EASTMAN CHEMICAL COMPANY
ECO PETROLEUM, INC.
ECOPETROL
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.
EMERY OLEOCHEMICALS, LLC
EMI
EMPIRE STATE OIL COMPANY
EMPRESS LIQUIDS
ENDEVCO
ENERGY RESEARCH & DEVELOPMENT ADMIN.
ENERGY TRANSFER
ENERGY TRANSFER PARTNERS
ENGINEERING TECHNOLOGY INC. (ETI)
ENGINEERING, PROCUREMENT & CONSTRUCTION, INC.
ENPPI
ENSA
ENSERCH
ENTERPRISE PRODUCTS COMPANY
ENTERPRISE PRODUCTS PARTNERS L.P.
EPCON
EQUILON PIPELINE
ERGON, INC.
ESCHER HOLLAND
ESSAR OIL, LTD.
ESSO RESOURCES CANADA, LTD.
EVERGREEN NYLON RECYCLING
EXXON
F
FARMERS UNION CENTRAL EXCHANGE
FASKEN C RANCH
FEAGAN ENERGY INC.
FINA
FIRST CHEMICAL
FISH ENGINEERING
FLETCHER OIL & REFINING
FLINT HILLS RESOURCES
FLORIDA RESEARCH & DEVELOPMENT
FLUOR DANIEL ENGINEERING
FLUOR ENGINEERING
FLYING J INC.
FORD, BACON & DAVIS ENGINEERING
FORMOSAN UNION CHEMICAL
FOSTER WHEELER
FRITO-LAY, INC.
FRONTIER REFINING COMPANY
G
GAS DEL ESTADO
GAS PROCESSORS, INC.
GASCO
GASTECH
GEA AIREXCHANGERS
GENERAL ELECTRIC
GEO
GEORGIA PACIFIC
GETTY OIL COMPANY
GIANT REFINING
GIBSON ENERGY LTD.
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
H
HAMILTON ENERGY
HANOVER-RUSSELL COMPANY
HAWAIIN INDEPENDENT REFINERY
HEAT & CONTROL, INC.
HENKEL CANADA, LTD.
HENLEY ENGINEERING
HERCULES POWDER COMPANY
HEYL & PATTERSON ENGINEERING
HILCORP NORTH SLOPE, LLC
HITACHI ZOSEN
HOECHST CHEMICAL GROUP, INC.
HOFFMAN LaROCHE
HOLLYFRONTIER CHEYENNE REFINING
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.
I
ILLINOIS MINERALS COMPANY
IMC CHEMICALS
IMPERIAL OIL COMPANY
INDUSTRIAL GAS CORPORATION
INDUSTRIAS RESISTOL
INDUSTRIE MECCENICHE SCARDELLATO (IMS)
INSA OIL BULGARIAN PETROLEUM COMPANY
INTE FINANCIAL
INTERNATIONAL GAS ENGINEERING, LTD.
INTERSTATE TREATING, INC.
INTEVEP
IRAN-PAN AMERICAN OIL COMPANY
J
J.L. DAVIS
JAMES UNITED STEEL, LTD.
JANNAH HUNT OIL COMPANY
JAPAN PETROLEUM COMPANY
JAPAN SYNTHETIC RUBBER COMPANY
JOHN DEERE CHEMICAL COMPANY
JORD ENGINEERING
K
KAIGNIN ENGINEERING
KANEB PIPELINE
KERNRIDGE OIL
KERR McGEE CHEMICAL, LLC
KERR-McGEE OIL INDUSTRIES
KEYERA PARTNERSHIP
KIKKOMAN FOODS, INC.
KINDER MORGAN TRANSMIX COMPANY LLC
KiOR COLUMBUS, LLC
KOBE STEEL, LTD.
KOCH HYDROCARBON IND.
KOCH INDUSTRIES
KTI ENGINEERING
KTI LAS PROCESSORS
L
LA GLORIA OIL & GAS COMPANY
LADD PETROLEUM COMPANY
LAGOVEN, S.A.
LAJET, INC.
LAMONT GAS PRODUCTS
LANCASTER STEEL
LaROUCH**
LAZARUS ENERGY, LLC
LG ENGINEERING
LG-CALTEX GAS COMPANY
LIG LIQUIDS
LION OIL COMPANY
LITTLE AMERICAN REFINING COMPANY
LITWIN ENGINEERS & CONSTRUCTION
LOCKWOOD GREEN
LONGVIEW REFINING COMPANY
LOTEPRO
LOUISIANA LAND & EXPLORATION
LOVELESS MANUFACTURING
LUCKY ENGINEERING
LUMMUS ENGINEERING
LUZ
M
M.W. KELLOGG
MAERSK OIL QATAR
MAGELLAN MIDSTREAM PARTNERS, L.P.
MALONEY-CRAWFORD
MANNESMANN ANLAGENBAU AB
MAPCO
MARATHON OIL COMPANY
MARATHON PETROLEUM
MARKWEST ENERGY PARTNERS, L.P.
MARKWEST HYDROCARBON
MARLEX OIL & REFINING
MARSULEX INC.
MATADOR PIPELINE
MAXUS CORPORATION
MAXUS SOUTHEAST SUMATRA
M-C POWER CORPORATION
McDERMOTT
McGILL, INC.
McKEE ENGINEERING
McWOOD CORPORATION
MENEVEN
MESA
MHG INTERNATIONAL
MICHIGAN CONSOLIDATED GAS
MID AMERICA PIPELINE COMPANY
MIDCOAST ENERGY LLC
MISSION WEST
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
N
NANHAI WEST OIL COMPANY
NATIONAL COOPERATIVE REFINERY ASSOCIATION
NATIONAL IRANIAN OIL COMPANY
NATIONAL TANK COMPANY
NATURAL GAS PIPELINE OF AMERICA
NERGAS CORPORATION
NEVILLE CHEMICAL COMPANY
NEWHALL REFINING
NEXLUBE TAMPA LLC
NIIGATA ENGINEERING
NKK
NOBLE ENERGY
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
O
OASIS OIL COMPANY
OFFICE OF COAL RESEARCH
OIL & NATURAL GAS COMMISSION OF INDIA
OIL REFINERIES ADMINISTRATION
OLDS GAS, LTD.
OLSEN COMPANY
OMAN-PETROLEUM DEVELOPMENT
ONEOK HYDROCARBON
ORE-IDA, INC.
ORIENTAL ELEPHANT
ORION REFINING CORPORATION
ORTLOFF CORPORATION
OXID, INC.
OXOCHEM ENTERPRISE
OXY COLUMBIA
P
PACIFIC ALASKA LNG
PACIFIC GAS & ELECTRIC
PAKISTAN PETROLEUM
PAN AMERICAN PETROLEUM CORPORATION
PARAMOUNT PETROLEUM
PARSONS ENGINEERING
PASCO INCORPORATED
PCC
PEMEX
PETROGAS WEST, LLC
PETROLEOS DE VENEZUELA PETROURICA
PETROLEOS MEXICANOS
PETROLEOS PARAGUAYOS
PETROLEUM AUTHORITY OF THAILAND
PETROLEUM PLANT TECHNOLOGIES
PETROLITE CORPORATION
PETROVIETNAM
PHEONIX CONSTRUCTORS
PHILADELPHIA GAS
PHILLIPS 66
PHILLIPS PETROLEUM COMPANY
PIPELINE TECHNOLOGIES
PLACID OIL COMPANY
PLAINS ENGINEERING
PMI
PONA ENGINEERING
POWERINE OIL COMPANY
PPG INDUSTRIES, INC.
PRATT & WHITNEY ENGINEERING
PRAXAIR, INC.
PREMIER PETRO-CHEMCIAL COMPANY
PRIDE REFINING COMPANY
PRITCHARD ENGINEERING
PROCESS TECHNOLOGIES INTERNATIONAL
PROCON ENGINEERING
PROENERGY EPC SERVICES
PRO-QUIP
PROVIDENT RESOURCES, LTD.
PROVO GAS PRODUCERS, LTD.
PSB
PT McDERMOTT ENGINEERING
PUBLIC SERVICES ELECTRIC & GAS
PURE OIL COMPANY
Q
QUAKER STATE
QUALCOMM
QUANTUM CHEMICAL
QUEST
R
R.L. FRAILEY COMPANY
RALPH M. PARSONS ENGINEERING
RANDALL ENGINEERING
REFINERIA DE PETROLEOS MANGUINHOS SA
REFINERIA PARAGUAYA, S.A.
REFINING ASSOCIATES, INC.
RENAISSANCE ENERGY
RENESSENZ
RENTECH NITROGEN, LLC
REXENE
RHODIACETA
ROCK ISLAND OIL COMPANY
ROCK ISLAND REFINING
ROUNDS & STEWART NATURAL GASOLINE COMPANY
S
S.I.P. ENGINEERING
SADARA COMPANY
SAMSUNG ENGINEERING
SANDIA
SAUYER TANK
SCHILLER ENTERPRISES
SCOTTISH ENGINEERING
SEBLIMA
SELAS**
SEMBAWANG
SEMCAMS
SEMINOLE PIPELINE COMPANY
SESLER & CAFFEY ENGINEERING
SEVEN GENERATIONS ENERGY LTD.
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
SPECTRA ENERGY
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
T.H. RUSSELL COMPANY
TAIWAN FERTILIZER COMPANY
TARGA BADLANDS LLC
TATHAM OFFSHORE
TENNESSEE GAS TRANSMISSION COMPANY
TESORO ALASKA COMPANY
TESORO PETROLEUM COMPANY
TEXACO CANADA RESOURCES, LTD.
TEXACO, INC.
TEXAS EASTMAN
TEXAS OIL & GAS COMPANY
THAI ASPHALT COMPANY
TIDEWATER OIL COMPANY
TOPSAIL ENERGY
TOSCO CORPORATION
TOTAL PETROLEUM COMPANY
TPC GROUP
TRANSAMERICAN REFINING CORPORATION
TRANSCANADA
TRANSCO EXPLORATION
TRANSCONTINENTAL GAS PIPELINE
TREND CONSTRUCTION
TRI SERVICE DRILLING COMPANY
TRONOX. LLC
TRONOX MANAGEMENT PTY LTD.
TRUE OIL COMPANY
T-THERMAL
TURBO POWER MARINE SYSTEMS
TURBO RESOURCES, LTD.
U
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 LUBE OIL COMPANY, LTD.
UNITED STATES AIR FORCE
UNITED STATES NAVY
UNIVERSAL MAINTENANCE
UOP COMPANY
UOP PROCESS DIVISION
V
VALERO HYDROCARBONS
VANSON ENGINEERING
VENETANK
VICKERS PETROLEUM CORPORATION
VISTRON CORPORATION
VITOK ENGINEERING
VNT INDUSTRIES
W
WARNER HENKE ENGINEERING
WARREN PETROLEUM COMPANY
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
WILLIAMS FOUR CORNERS LLC
WISON OFFSHORE & MARINE, LTD.
WITCO CHEMICAL CORPORATION
WOODS PETROLEUM
WORLEY ENGINEERING
WRIGHT TECHNIP, LTD.
X
Y
YACIMENTOS PETROLIFEROS FISCALES
YOSU ENERGY
YUKONG, LTD.