Project Description

Tug Harbour Maintenance Dredge Spoil Sediment Assessment

O2 Marine was engaged to implement a sediment investigation of the tug harbour in accordance with the National Assessment Guidelines for Dredging (2009). Elevated TBT was found in some samples of whole sediments, although subsequent elutriate analysis indicated that the bioavailable fraction of TBT was below the LoR and the low Interim Sediment Quality Guideline levels. O2 Marine subsequently undertook a pre-referral discussion with EPA and prepared a dredge management plan for the proposed maintenance dredging works.

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