the quantity of organic solvents and their quantity in mixtures used when carrying out an activity, including the solvents recycled inside and outside the installation, and which are counted every time they are used to carry out the activity, orgaaniliste lahustite kogus ja nende kogus kasutatavates segudes, kaasa arvatud käitises ja väljaspool seda ringlusse võetud lahustid, mida arvestatakse iga kord toimingu teostamisel