| 1992 | Joint holding with the German firm RWE in the company SCR, for the management of the Solius county dump. |
| 1993 | Foundation of the company TAP, S.A. for the management of the Cervera county dump and the selective collection of urban waste in La Segarra, La Terra Alta, La Ribera d'Ebre and El Priorat. |
| 1994 | Joint holding with the German firm RWE in the company SIL, for the management of the Lloret de Mar comprehensive waste service. |
| 1997 | Joint holding with the firm Miquel Costa, S.A. in the company TAE, for the management of the Pedret i Marzā county dump, and subsequently cleaning and urban waste collection services through FISERSA (in Figueres) and ROSESnet (in Roses). |
| 2001 | Foundation of the Temporary Business Association, Montsiā, for the construction and management of the composting plant and the dump of Mas de Barberans. |
| 2003 | Purchase of the holdings of RWE Umwelt AG in RWE Umwelt Services Espaņa, S.A. |
| 2003 | Purchase of 90% of CATOR (10% Agčncia Catalana de Residus - Waste Agency of Catalonia) for the collection and treatment of all used mineral oils in Catalonia. |
| 2004 | Purchase of a 100% holding in the company TAE from the partner of Miquel Costa, S.A. TAE manages both the Pedret i Marzā county dump and urban waste collection services, children's parks, and public lighting and gardens through the companies FISERSA (in Figueres) and ROSESnet (in Roses). |
| 2004 | Purchase of the companies J. J. Medio ambiente and Lozano, foundation of the company SIRCAT, which provides a comprehensive vehicle workshop waste management service. |
| 2004 | Foundation of the company TELWESA, which provides a comprehensive water treatment service (with the partners CASAS MASGRAU and WEHRLE UMWELT) |
