2- at least three (3) staff currently work for the tenderer in fields related to the lot(s) tendered. 

3) Technical capacity (based on items 5 and 6 of the tender form for supply contracts). The reference period which will be taken into account will be the last three years from submission deadline. 

## Criteria for legal and natural persons: 

1- the tenderer has provided supplies under at least two (2) contracts with a budget of at least 50% of the amount offered for the tendered lot, in the field relevant for the tendered lot, which were implemented at any moment during the reference period: last three years. 

This means that the contract the tenderer refers to could have been started or completed at any time during the indicated period but it does not necessarily have to be started and completed during that period, nor implemented during the entire period. Tenderers are allowed to refer either to projects completed within the reference period (although started earlier) or to projects not yet completed. In the first case the project will be considered in its whole if proper evidence of performance is provided (statement or certificate from the entity which awarded the contract, final acceptance). In case of projects still on-going only the portion satisfactorily completed during the reference period will be taken into consideration. This portion will have to be supported by documentary evidence (similarly to projects completed) also detailing its value. If a candidate has implemented the project in a consortium, the percentage that the candidate has successfully completed must be clear from the documentary evidence, together with a description of the nature of the services provided if the selection criteria relating to the pertinence of the experience have been used. 

The relevant fields of expertise for this purpose are as follows: 

Lot 1: I nland surface and groundwater monitoring 

Lot 2 and 3: Groundwater monitoring 

Lot 4: IT Equipment 

Lot 5 and 6: I nland and marine water monitoring 

Lot 7, 8, 9, 10, 11, 12, 13, 14 and 15: Marine Water Monitoring 

Previous experience which caused breach of contract and termination by a contracting authority shall not be used as reference. 

## Capacity-providing entities 

An economic operator may, where appropriate and for a particular contract, rely on the capacities of other entities, regardless of the legal nature of the links which it has with them. If the economic operator relies on other entities it must in that case prove to the contracting authority that it will have at its disposal the resources necessary for performance of the contract by producing a commitment by those entities to place those resources at its disposal. Such entities, for instance the parent company of the economic operator, must respect the same rules of eligibility and notably that of nationality as the economic operator relying on them and must comply with the selection criteria for which the economic operator relies on them. Furthermore, the data for this third entity for the relevant selection criterion should be included in a separate document. Proof of the capacity will also have to be provided when requested by the contracting authority. 

With regard to technical and professional criteria, an economic operator may only rely on the 

