General invitation to tender for services: Ecological monitoring OW plan Ostend seawall and maritime access to Ostend (t1 situation-phase). The object of the contract is two-fold: 1) the taking of samples and laboratory research relating to the biological t1-situation of soft substrates, in the coastal zone to Ostend (and, as well as processing, analysis, interpretation and presentation of analysis results; 2) The providing expert advice, to formulate research proposals and support in the preparation of EIA reports the contract is following tasks: 1. Measurement campaign soft substrates * sampling of beach and foreshore samples; * Organic laboratory examination of the samples (macrobenthos-research); * Physico-chemical laboratory analysis of the samples; 2. The processing, analysis, interpretation and reporting of the test results, including the coupling of the physico-chemical data to the biological. The previously collected data HINTS T0 ecological monitoring is integrated into the reporting. 3. Provision of expert advice based on their own expertise and the current investigation.