AFFILIATED FOODS
AGRIUM U. S. INC./COMINCO FERT.
AMERICAN FRUCTOSE
AMERICAN GRATING
AMERICAN MAIZE
AMERICAN PROCESSING
AMERICAN SPRAYERS, INC.
ANDERSON CHEMICAL
ARCO ARISTECH CHEMICAL
BIO-SURGE
BOOKER PACKING CO.
BORDEN PEANUT CO.
BOVARD SUPPLY (TULSA)
CELANESE LTD.
CERESTAR USA
CHEMICAL WASTE MANAGEMENT
CITY OF AMARILLO
CITY OF AMARILLO OSAGE
CITY OF CLAUDE
CITY OF DALHART
CITY OF DUMAS
CITY OF HOBBS NEW MEXICO
CITY OF HOOKER
CITY OF MULESHOE
COASTAL PRODUCTS & CHEMICALS
COOPER INDUSTRIES CROUSE-HINDS
DAVIS FARM SUPPLY
DEAN PICKLE & SPECIALTY PROD.
DYNAGEN INC.
ECOLOQUIP INC
EDGEWOOD MEADOW WATER COOP
ENGINEERING PRODUCTION SERVICES
ENPROTEC
ENVIRO WORKS, LLC
EXCEL CORPORATION
FEN-TECH ENVIRONMENTAL, INC.
FLOW DESIGN INC.
FRENCH MUTUAL DOMESTIC WATER
GENERAL TIRE
HIGGINBOTHAM BARTLETT

IOWA BEEF PROCESSORS (IBP)
MONFORT ENGINEERING
NORIT AMERICAS INC.
OGDEN ENVIRONMENTAL
OWENS CORNING
PREMIUM STANDARD FARMS
PROCEDAIR INDUSTRIES CORP.
RUSH ENGINEERING
S.B. FOOT TANNING CO.
SERVCO, INC.
STRUCTURAL PRESERVATIONS SYS. I
STYROCHEM U.S., LTD.
SUNLAND CONSTRUCTION
TANKS & PROCESS
TEXAS DEPT. OF CRIMINAL JUSTICE
THE UNIVERSITY OF OKLAHOMA
THE UNIVERSITY OF TULSA
TX DEPT OF TRANSPORTATION
U. S. DEPARTMENT OF AGRICULTURE
U. S. TREASURY
U.S. BUREAU OF MINES
U.S. BUS MANUFACTURING
UNITED PARCEL SERVICE
UNITED STATES POSTAL SERVICE
UNIVERSITY OF TULSA
USDA ARS
US FILTER
USS ATLANTA CL104
VISTA ENVIRONMENTAL SERVICES CO
WATER SYSTEM SERVICES, INC.
WAYNE CHEMICAL CORP.
WEST TEXAS A&M
WESTERN BUILDERS
WILEY HICKS JR. CONSTRUCTION
WILSON ENVIRONMENTAL
WILSON SUPPLY
WYLIE MFG
ZIPP INDUSTRIES

1031 EXCHANGE CORP
2 M COMPANY OF NM
AKEM RESOURCES INC.
AMERADA HESS CORP.
AMOCO PRODUCTION
ANADARKO PETROLEUM
ANCHOR WEST
ANR PIPELINE
APACHE CORP
ARIOLA DRILLING CO.
BIRD CREEK RESOURCES
BOC GASES
BOSWELL ENERGY CORP
BURLINGTON RESOURCES
CABOT OIL AND GAS CORP.
CHESAPEAKE OPERATING, INC.
CHEVRON
CHEVRON USA
COASTAL CORPORATION
CODA ENERGY
COLORADO INTERSTATE GAS
COMBUSTION SERVICE CO.
COURSIN OIL & GAS
CROMERA OIL & GAS
DIAMOND SHAMROCK
DIESEL RECON COMPANY
DORCHESTER HUGOTON
GPM GAS CO., LLC
J.M. HUBER CORPORATION
KN ENERGY
KOCK OIL COMPANY

KUPER ENTERPRISES, INC.
MAXUS
MIDGARD ENERGY COMPANY
MOBIL E&P U.S. INC
MOBIL EXPLORATION & PRODUCING
NATURAL GAS PIPELINE CO.
NORTHERN NATURAL GAS
OCCIDENTAL PERMIAN LTD.
OXY U.S.A., INC.
PANHANDLE EASTERN PIPE LINE CO.
PHILLIPS 66 COMPANY
PHILLIPS E&P
PHILLIPS PIPELINE COMPANY
PIONEER NATURAL RESOURCES USA
PRIZE OPERATING CO.
PUMPS OF OKLAHOMA, INC.
R K PETROLEUM
REDMAN PIPE & SUPPLY
RIATA ENERGY
RUDD-PALMER CO.
TEXACO, INC.
TEXACO, INC.-AMARILLO
THE OPERATING CO.
TIDE WEST OIL COMPANY
ULTRAMAR DIAMOND SHAMROCK
WBD OIL & GAS COMPANY
WEST TEXAS CONTRACTORS
WEST TEXAS GAS, INC.

AL'S BROKEN BAR FARMS
BIG BEND NATIONAL PARK
KEITH BOONE
BOWE & FARMER
CACTUS FEED YARD
CAL FARLEY'S BOYS RANCH
CHILDERS RANCH
CORSINO CATTLE CO.
CROSS BAR CATTLE CO.
CROSS F RANCH
CROSS L RANCH
CUMMINGS RANCH
CUNNINGHAM LIVESTOCK
CURCLE J CATTLE
CURRIE CATTLE
DOC POWELL CATTLE CO.
DOUBLE D RANCH
DOUBLE F RANCH
DOUBLE HEART CATTLE CO.
DOUBLE J DAIRY
DOUBLE V RANCH
DRIPPING SPRINGS CATTLE, LTD.
DUKE FARMERS COOP.
FRIONA INDUSTRIES
GLOBAL ANIMAL PRODUCTS, INC.
HARPER CATTLE COMPANY
KIOWA & RITA BLANCA NATIONAL

MATADOR CATTLE CO.
MC CLOY FARMS
MESCALERO APACHE CATTLE
MONTGOMERY FARMS
NATIONAL PARK SERVICE
NAVAJO NATION
PANHANDLE GROUND WATER CONS.
SOUTHWEST WATER CONDITIONING
SOUTHWEST WINDMILL & WATERWELL
SPANISH PEAKS LANDOWNERS ASSO.
SPORTSMEN CONSERVATIONIST OF TX
TAOS PUEBLO CENTRAL MANAGEMENT
TEXAS & S.W. CATTLE RAISERS
TEXAS AGRIC EXPERIMENT STATION
TEXAS BEEF & CATTLE PRODUCERS
TEXAS CATTLE FEEDERS ASSO.
TEXAS FRESHWATER FISHERIES CENT
TEXAS PARKS & WILDLIFE DEPT.
THE NATURE CONSERVANCY OF TX.
THOMPSON CATTLE CO.
TRIPLE K CATTLE
TRIPLE L UTILITIES
TROUTMON RANCH
BOB TROXELL
TRUJILLO, NEL
TUB SPRINGS RANCH ACCOUNT
V-4 LAND & CATTLE INC.

AMARILLO GEAR
AMERON HAWAII
AMISTCO SEPARATION PRODUCTS
ASARCO INCORPORATED
CONCRETE PIPE & PRODUCTS
CROSS TIMBER KOI
DONREY OUTDOOR
DUTCHMANS MOTORCYCLES
HANSON CONCRETE PRODUCTS
HONEYCOMB COMPOSITE SYSTEMS
JOHNSON FILTRATION

MISSOURI BASIN CONST. CO.
PANTEX PLANT
PILLSBURY COMPANY
SIERRA TRANSIT MIX
SIMMONS AND MCNABB
SOUTHWESTERN BELL
TEXAS COMPOSITE INC.
TEXAS PIPE & STEEL WORKS, INC.
TRADEWIND TURBINE
TRINITY SLING AUTHORITY

CALVETTI COMPANY
CERAMIC COOLING TOWER
COOLING TOWER SPECIALIST
CUSTODIS-ECODYNE
GEA INTEGRATED COOLING TECH.
INDUSTRIAL COOLING TOWER
LOUISIANA COOLING TOWER

PSYCHROMETRIC SYSTEMS, INC.
SOUTHWESTERN PUBLIC SERVICE
STAR COOLING TOWER
TOWER PERFORMANCE OF TEXAS
TOWER REPAIR SPECIALISTS
UTILITY ENGINEERING
UTILITY SERVICES CO.