The D’Onghia enterprise is fully qualified for the execution of public works thank to the SOA certification that attests our works are carried out accordingly to Art.8, Law 11/02/1994 n.109, for contracts in the public sector starting from €150.000. This certification is renewed every 5 years and is given following a technical and economical analysis of the company performance in that time frame.

SOA Category	Class
OG1 - Civil and industrial buildings	V - € 3,500,000
OG3 - Roads, highways, bridges, viaducts, railways, subways	III Bis - € 1,033,000
OG9 - Plants for the production of electricity	III - € 1,500,000
OG11 - Technological systems	I - € 258,000
OS21 - Special structural works	IV - € 2,582,000

Download the certifications and authorizations PDF

The improvement of the quality leads to cost reduction, as a quality product appeals to a bigger market therefore allowing cost cutting initiatives.
The company has obtained the worldwide-recognised ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 certifications, that attests the compliance with specified standards for:

• The business and marketing plan according to customer needs
• Management Responsibility
• Resource Management
• Product Realization

The company also has registration in the Register of Environmental Managers in the Categories: 8 C (from 15000 to 60000 tons per year) intermediation of hazardous and non-hazardous waste, 4 B (from 60,000 to 200,000 tons per year) Transport of special non-hazardous waste, 5 F (less than 3,000 tons per year) Transport of hazardous waste, 9 E (construction work up to € 200,000) Site remediation and the Authorization for the transport of goods on behalf of third parties