Environmental engineering, energy, climate, water and biodiversity

• Safety and environmental audits (Phase 1) of the 56 sites under consideration. The aim of each Phase 1 audit is to assess the site's liabilities and any risks to our client.
• Phase 2 audits (soil investigation campaign) based on a programme defined by Ginger BURGEAP at 5 of the sites.
• Remediation works at 3 of the sites.
   

Odour emission audits were carried out at each site in order to characterise the odour emissions of the establishments concerned and to achieve the following objectives:

• To objectively characterise the odour situations (frequency, duration, quality and intensity of the odours, in relation to the nature of the activities of the establishments).
• To attribute the origin of the odours perceived by the experts to potential odour sources and to investigate the link with the annoyance perceived by local residents.
• To prioritise odour sources and make recommendations for improvement.

The results of the study were presented at a public information meeting for local residents.
 

• Preparation of the full DDAE file:
  • impact study,
  • hazard study, including modelling potential accident scenarios such as fire and explosion,
  • health and safety notice,
  • administrative and technical files.
• Various presentations of the project at the Port of Sète (public meetings)
• Follow-up of the file until its final approval and receipt by PETROFER Société Nouvelle of the prefectoral operating order no. 2013-1-2008 of 17 October 2013

• Wet and dry network investigations.
• Project management for the design, implementation and supervision of the works:
  • The restoration of wastewater networks/separating wastewater and rainwater networks,
  • Infiltration management for low rainfall and up to thirty years through the creation of drainage beds and landscaped valleys, as well as an open-air basin designed as a play area with an overflow to the public drainage system (flow rate 1 l/s/ha)
  • Irrigation systems for the vegetable gardens and the educational river using rainwater collected and stored at the gutter outlets

Integrating all of the hydraulic systems into the landscape 
Time constraints: civil engineering works during the summer holidays (July-August).

 

This study was carried out in 4 stages:

• A summary of existing data on the receiving environment compared with the annual average Environmental Quality Standard (EQS) for zinc.
• Additional chemical monitoring of the water matrix over 4 campaigns.
• BLM (Biotic Ligand Model) modelling to calculate the dissolved bioavailable fraction of zinc, in accordance with section 1.3.2 of the French Order of 27 July 2018, amending the Order of 25 January 2010, on the methods and criteria for assessing the ecological status, chemical status and ecological potential of surface waters.
• An assessment of the impact of the discharge on the environment in accordance with WFD (Water Framework Directive) criteria.

Ginger BURGEAP has studied the scenarios for recharging the groundwater table using water from the Rhône or cooling water from the industrial platform via 3 recharge vectors: the lônes, the network of oldfilled-in canals or artificially via infiltration basins.

• A technical study of the options for recharging the groundwater table.
  Interfaces between scenarios and socio-economic and biodiversity issues.
• A study into the scenarios for replenishing the groundwater and their financial estimates.
• A non-technical summary for decision-makers, including a comparison of scenarios and management options.

• On-site services: topographic and bathymetric surveys, sediment sampling (using a Russian core drill, sediment bucket or diving tubes), cross-section surveys, water sampling, packaging and transport in accordance with current standards.
• Laboratory analyses: assessing the degree of contamination, the possibility of re-suspension or the need for land-based management, determining the inert nature, assessments for other land-based processes (land applications, biological treatments, etc.).
• Engineering: assessing the degree of pollution, determining the volumes involved (GeoMensura® modelling), carrying out a cost-benefit analysis of the management solutions, selecting the best solution in consultation with the contracting authority, identifying the preliminary administrative procedures required and their deadlines (water regulations, fauna/flora, wetlands, waste management, etc.).

A comprehensive project management mission including the completion of the project study phase, preliminary design phase, contract award phase, structural design study supervision phase, construction management, project handover assistance and scheduling, control and coordination.

The works programme includes the construction of:

• a 3rd landfill locker dike, including earthworks, the installation of passive and active barriers, and the creation of a collection and transfer system for internal and external rainwater and leachate,
• a leachate extraction station,
• 4 vents for controlling biogas from old waste,
• access routes, fencing and a gate,
• a recording and remote transmission system to measure the flow of leachate from the 2nd and 3rd landfill locker dikes, the level of leachate in the basin and the amount of rainfall.
   

As part of the works, Ginger BURGEAP and Ginger CEBTP have been commissioned to carry out independent inspections of key points in the execution of the works. The inspections focused on load-bearing capacity (plate tests), compactness (gamma ray densitometer), checking the passive barriers (NFX 30-420 and NF X30-424 permeability tests) and checking the active barrier (double-welds and geomembrane extrusions) in accordance with the regulations in force and, in particular the Prefectoral Operating Permit Order and the amended Ministerial Order of 30 December 2002 on hazardous waste storage facilities.

Ginger BURGEAP and Ginger CEBTP were also responsible for drawing up a completion of works file containing all the checks and inspections required to validate the proper execution of the works for ARCELOR and the DREAL (Regional Department for the Environment, Planning and Housing).

For this project, Ginger BURGEAP was responsible for the following missions:

• Feasibility studies: geotechnical, permeability, load-bearing capacity, diagnostics and reducing leachate contamination;
• Complete project management for the design and supervision of the execution of the works, including the preliminary design phase, project study phase, contract award phase (CCTP, RC & Plans), structural design study supervision, construction management, pre-handover operations and project handover assistance, taking into account a large number of site constraints (site in operation, gravity drainage of run-off water, and maximum recycling of materials).
• Independent inspections of the geomembrane (basin and underground geomembrane).