C.P.F. Dualam Ltd. - CANADA

Caldyn Apparatebau GmbH - GERMANY

Calgon Carbon Canada - CANADA

Calgon Carbon Corporation - PA, USA

California Operating Services - CA, USA

Cameron Carbon, Inc. - MD, USA

Cameron Environmental, Inc. - CA, USA

Cameron Great Lakes - OR, USA

Cameron/Great Lakes, Inc. - IL, USA

Cameron-Yakima, Inc. - WA, USA

Camfil Farr Company - CA, USA

Camfil Farr-Jonesboro Plant - AR, USA

Camp Dresser & McKee, Inc. - MA, USA

Camp Dresser & McKee, Inc. - NJ, USA

Canadian Coating Industries - CANADA

Canadian Energy Services, Ltd. - CANADA

Canadian Indust.Tube Bend,Inc. - CANADA

Canadian ORTECH Environmental - CANADA

Canavan Technologies, Inc. - NJ, USA

Cansolv Technologies, Inc. - CANADA

Caprice Construction Company - TN, USA

CAPTAIR LABX, Inc. - MA, USA

Carbochem, Inc. - PA, USA

Carboline Company - MO, USA

Carbon Link Ltd. - UNITED KINGDOM

Carbonair Environmental Systems - MN, USA

Carbone, A.C. Canada, Inc. - CANADA

CarboTech GmbH - GERMANY

Carbtrol Corporation - CT, USA

Cardin SPA - ITALY

Carmeuse NA-Dravo Tech. Centre - PA, USA

Carmeuse North America - IL, USA

Carmeuse North America - PA, USA

Carter Environmental Engineers - UNITED KINGDOM

Cartier Chemicals Ltd. - CANADA

Carus Chemical Company - IL, USA

Catalytic Combustion Corp. - WI, USA

Catalytic Products International - IL, USA

CBP Engineering Corporation - PA, USA

CECO Filters, Inc. - PA, USA

Ceilcote Air Poll.Control/ ITEQ Co. - OH, USA

Ceilcote APC/Air-Cure Technol. - CANADA

Ceilcote Luft./Air-Cure Envr. GmbH - GERMANY

Celgene Corporation - NJ, USA

Central Ontario Metal & Constr - CANADA

Centrozap Foreign Trade Ltd. - POLAND

Century Environmental Sys.Inc. - CANADA

Century Plastics, Inc. - TX, USA

CES Thermal Services Ltd. - CANADA

CH Technology Corporation - TAIWAN

CH2M Gore & Storrie - CANADA

CH2M Hill - CA, USA

CH2M Hill - FL, USA

CH2M Hill - VA, USA

Challenge Environmental Engr. - TAIWAN

Chamberlain Mfg.Corp./Gard Dv. - TX, USA

Champion Engr. Taiwan Corp. - TAIWAN

Champion Environmental Engin. - TAIWAN

Chandler, A.J. & Assoc. Ltd. - CANADA

Cheer Year Industrial Co., Ltd - TAIWAN

Chematur Engineering AB - SWEDEN

Chemical Lime Co./Eastern Div. - TX, USA

Chemline Plastics Ltd. - CANADA

Chemokomplex - HUNGARY

Chem-Resist Group Limited - UNITED KINGDOM

Chemviron Carbon - BELGIUM

Chemviron Carbon - FRANCE

Chemviron Carbon - UNITED KINGDOM

Chemviron Carbon GmbH - GERMANY

Cheng Chen Machinery Co., Ltd. - TAIWAN

Cheng Shun Lin Enterprise Co. - TAIWAN

Chi Line Industrial Co., Ltd. - TAIWAN

Chi Mei Entech Co., Ltd. - TAIWAN

Chia-Hwa Environ.Engineering - TAIWAN

Chieng Shyong Machinery Co. - TAIWAN

Chiloo Industries, Inc. - TAIWAN

Chin Tjen Company Ltd. - TAIWAN

China Asia Envr. Tech. Engr. - TAIWAN

China Envirosphere Engineering - TAIWAN

China Steel Corporation - TAIWAN

Chin-Tung Envr.Engineering Co. - TAIWAN

Chiu Jung Envr. Sci.& Tech.Co. - TAIWAN

Chiun Cheng Industrial Ltd. - TAIWAN

Christ AG - SWITZERLAND

Chuan Yuan Hydraulic Engr. Co. - TAIWAN

Chung Hsin Elect. & Mach.Mfg. - TAIWAN

Chung Kung Incinerator Co. Ltd - TAIWAN

Church & Dwight Co, Inc. - NJ, USA

Chyaun Hung Engineering Co.Ltd - TAIWAN

Ciba Specialty Chemicals GmbH - GERMANY

Ciba-Geigy AG - SWITZERLAND

Citgo Petroleum Corp. - LA, USA

ClairTech - GERMANY

Claude Laval/ Lakos Filters - CA, USA

Clayton Environmental Corp. - CA, USA

Clean Flo Gas Filtration Sys. - CANADA

Clean Gas Systems, Inc. - NY, USA

Clean Technology Co., Ltd. - THAILAND

Clomar - ITALY

CMI International - IL, USA

CMI-Schneible Co/McDaniel Tank - MI, USA

CMS Group, Inc. - CANADA

CNIM/Constr.Indust.Mediterran. - FRANCE

Coastal Chemical Company - TX, USA

Coastal Technologies, Inc. - SC, USA

Colasit AG - SWITZERLAND

Colasit Deutschland GmbH - GERMANY

College Research Corp. - WI, USA

Colloid Environmntl.Tech/CETCO - IL, USA

Colt International GmbH - GERMANY

Colt International Ltd. - UNITED KINGDOM

Compass Envr.Engineering Corp. - TAIWAN

Consolv Technologies, Inc. - CANADA

Continental Water Engr. Corp. - TAIWAN

Controlled Environment Sys/CES - WI, USA

Coors Wear Products, Inc. - PA, USA

Copital Environ. Engr. Corp. - TAIWAN

Coral SpA - ITALY

Coreco - WI, USA

Corning, Inc. - NY, USA

Coromandel Prodorite Ltd. - INDIA

Corrosion Materials - LA, USA

Costacurta SpA-Vico - ITALY

Costain Oil, Gas & Process Ltd - ENGLAND

CPL Miller Environmental Ltd. - UNITED KINGDOM

Crochet Equipment Company - LA, USA

Croll-Reynolds Clean Air Tech. - NJ, USA

Crown Andersen Far East Oper. - SINGAPORE

CTCI Corporation Co., Ltd. - TAIWAN

Custom Environmental Services - CANADA

CVM Corporation - DE, USA

CVT America/Princeton Res.Ctr. - NJ, USA