on ▁part ▁of ▁Belg ium ; ▁and ▁Ext ract - E c oter res ▁which ▁focus es ▁on ▁France . ▁Two ▁new ▁DE C - sub s idi aries ▁were ▁established ▁in ▁October ▁ 2 0 1 0 : ▁Pur az ur ▁clusters ▁existing ▁activities ▁in ▁the ▁field ▁of ▁water ▁treatment ▁and ▁focus es ▁on ▁industrial ▁waste water ▁treatment ▁in ▁the ▁first ▁place ; ▁Ter ren ata ▁is ▁active ▁in ▁purch asing , ▁rem ed iation ▁and ▁re development ▁of ▁so - called ▁brown field ▁land . ▁In ▁the ▁latter ▁respect , ▁Ter ren ata ▁is ▁business ▁partner ing ▁with ▁B PI ▁and ▁Ext ensa , ▁the ▁project ▁development ▁companies ▁of ▁the ▁two ▁DE ME ▁share hold ers . ▁ ▁Part icip ations ▁DE ME ▁particip ates ▁in ▁several ▁companies ▁that ▁are ▁co - owned ▁with ▁partner ▁companies . ▁Middle ▁East ▁D red ging ▁Company ▁( ME D CO ) ▁is ▁a ▁partners hip ▁of ▁DE ME ▁with ▁the ▁Q at ari ▁United ▁Development ▁Company ▁( U DC ) ▁and ▁the ▁Q at ari ▁government . ▁M ED CO ▁focus es ▁on ▁d red ging ▁and ▁land ▁re clam ation ▁projects ▁in ▁the ▁G ulf . ▁In ▁ 2 0 0 4 ▁International ▁Se ap ort ▁D red ging ▁( IS D ) ▁was ▁incorpor ated ▁under ▁Indian ▁law ▁as ▁a ▁private ▁joint ▁stock ▁company ▁together ▁with ▁Lars en ▁& ▁T ou bro . ▁I SD ▁focus es ▁on ▁port ▁development ▁and ▁land ▁re clam ation ▁in ▁India . ▁S cal dis ▁Salv