assessment. State how any uncertainty resulting from variable data, poor data quality or gaps in data in relation to the RA property affected, (a) the setting of objectives for the ecological risk assessment; and (b) the ability to meet those objectives. (b) Receptor Characterization Describe in detail the characteristics of every valued ecosystem component, both on and off the RA property, identified in the ecological conceptual site model. (c) Exposure Assessment (i) Pathway Analysis Describe in detail every exposure pathway identified in the ecological conceptual site model. Justify which exposure pathways are incomplete. (ii) Exposure Estimates For every complete exposure pathway, state, (a) the relative frequency and duration of actual or potential exposures; (b) the relative magnitude of exposure to the valued ecosystem components, using measured contaminant exposure concentrations or concentrations predicted through fate and transport modelling in a manner compatible with that used in the human health risk assessment; and (c) given the uncertainty described under the heading of "Problem Formulation", how does this uncertainty affect the outcomes of the exposure assessments conducted under clauses (a) and (b). (d) Hazard Assessment State the potential adverse effects on the valued ecosystem components associated with their exposure to each contaminant of concern. For each contaminant of concern, (a) describe the relationship between the magnitude of exposure to the contaminant from each route of exposure and the probability of the occurrence of the adverse ecological effect identified in the hazard assessment; (b) if the data permits, propose a toxicity reference value for