Ministry of Environment and Water

                   Ministry of Health

Ministry of Agriculture

Bulgarian Academy of Sciences

Trakia University

University of Plovdiv

HTU

TITAN - Gold Panega AD

   Devnya Cement, cityDevnya

Ecorec Bulgaria

Holcim Serbia

  Volcano Corp., Ltd. Dimitrovgrad

Esab Welding Corp.

  SGS Bulgaria

    Incotex / Semiteh Ltd.

Geotrading Ltd.

   Deven AD

Chelopech Mining Corp., villageChelopech

Chim - 2007 Commerce Ltd.

  Asarel Medet, cityPanagyurishte  

Komihris Ltd.

   Elatsite Med villageMirkovo

  Medimag - MS Ltd.

  Cumerio Med, cityPirdop

Laboreks Ltd.

   State Reserve, citySliven

Labkonsult Ltd

  Solvay Sodi AD, the cityDevnya 

Ecotech Engineering

  "Maritsa Iztok" AD, townRadnevo 

  Combine ferrous metals AD, the citythe town of Plovdiv

Electrodes AD Ihtiman

Ideal Standard Bulgaria

Customs Agency

  Solarpro

Energy - LD

  Energomontage Engineering

Labsistems

Steel Industry Corp.

Daedalus Group BG