Basic Assessment Report - Transnet

Transnet LimitedProposed RO Plant: Port of SaldanhaFinal Basic Assessment Reportb) Monitoring of the RO Plant effluent for heavy metals after commissioningof the RO Plant;c) Toxicity testing of the RO Plant effluent at the discharge point for a fullrange of operational scenarios (i.e. shock-dosing);d) Monitoring to ensure that tainting substances are absent from the RO Planteffluent; ande) Monitoring to confirm performance of the discharge system and thenumerical model predictions.General essential mitigation measures:1. Limit the usage of chemicals in the RO process and in the cleaning process tothose listed and assessed in this report. If any additional chemicals proposed foruse in the RO process and in the cleaning process are proposed DEAT, DWAFand DEA&DP must be informed of these immediately. Transnet must provideassurance that any additional chemicals will not be any more harmful thanprevious chemicals and the impacts of this must be monitored.2. Store all chemicals used in the RO process appropriately as prescribed in theOccupational Health and Safety Act, 85 of 1993 and obtain all relevant permitsfrom the local authority prior to storage of the chemicals.3. Formulate and implement a CEMP and additional working procedures (as part ofthe Port’s Environmental Management System [EMS]) for the operational phaseof the project that includes specifications to address the following:Construction Phase:a) Management of accidental spills of chemicals, fuel, oil and / or grease;b) Vehicle maintenance and refuelling; andc) Concrete works.Operational Phase:a) Develop a monitoring programme to monitor the discharge of brine; andb) Storage of chemicals on site.4. Do not dispose of wastewater associated with the cleaning and backwashing ofthe RO membranes via the municipal sewer system without written confirmationfrom the relevant authority, who must be made aware of all the chemicalscontained in the wastewater.Optional mitigation measures, which would further assist in reducing theenvironmental impacts associated with the proposed RO Plant, but theimplementation of which cannot be guaranteed (and have thus not been considered inthe assessment of the significance of environmental impacts) have also been listed in59Prepared by the PDNA/SRK Joint Venture