The Attica Prefecture Special Association Announces An Electronic Public Open Competition With The Aim Of Concluding A Service Contract Entitled "Environmental Services Service And Control On Edna Management Installations" Four Euros (827,984,00 €), Plus The Corresponding Vat And Option For A Period Of 12 Months, Amounting To Three Hundred And Six Thousand Nine Hundred Ninety -Two Euros (386,992,00 €) In Addition To The Corresponding Vat, With The Criterion Of Assignment Of The Contract On The "Most Interesting Price" Cpv: 90711500-9 Environmental Monitoring Outside That Is Intended For Construction Projects