Fourteen companies have submitted offers for cleaning nineteen districts in the Bulgarian capital Sofia, which has been battling garbage problems for years.

The bulk of the bidders are Bulgarian companies, but there are also Romanian and German, it emerged on Monday after their bids were opened. The contract will be in force for four yeas.

Sofia municipality has banned bidders from vying for more than two out of the seven zones in a bid to prevent monopoly. Some of the companies, however, has found a roundabout way how not to break this rule by being a part of a number of tie-ins bidding in the tender.

This is how Titan company, which is currently in charge of cleaning part of the Bulgarian capital, and its subsidiaries have submitted bids for a total of six zones by forming three tie-ins.

“This is legal and we believe that we won’t be disqualified for being part of several tie-ins,” Ivo Ivanov, owner of the company, told Dnevnik daily.

The European Commission has recently confirmed that it will pursue court action against Bulgaria for failing to properly implement EU waste law, more than two years after it launched an infringement procedure on the issue.

This will be the first trial launched by the European Commission against the EU newcomer.

The case concerns inadequate waste disposal in the capital Sofia, which should have had a network of waste disposal installations in place by the time of its accession on 1 January 2007. A solution remains some years away.

Sofia's failure to improve its waste management infrastructure was one of the six issues on which the European Commission launched infringement procedures against Bulgaria at the end of October 2007.

As Bulgaria failed to address the European executive's concerns, the matter has now be referred to the European Court of Justice, the highest judiciary authority in the bloc, which the country joined in January, 2007.

The trial against Bulgaria in the European Court of Justice is expected to last at least two years. It will be suspended provided that the country manages to deal with the shortcomings.

Finding a solution to Sofia ongoing waste problems was a politically sensitive issue in the months before the parliamentary elections last summer, which mayor of the capital Boyko Borisov won by a large margin.

The previous Socialist-led government officially declared a state of emergency in Sofia at the beginning of April over lack of adequate waste removal, saying that the garbage problems threatened national security and citing health and environmental concerns.