Dig out a trench and remove soil

Need to dig out a trench so that we can waterproof the retaining wall and install a drainage system behind downstairs living area. Roughly, we need about 6m3 of soil dug out and removed. Unfortunately, the access is not easy so soil will need to be carried out in buckets (require multiple workers). The area you will be working in is pretty spacious though and you can stand up comfortably. We can either get a skip bin for you but prefer if you can take the soil with you and dispose it. If you can include the soil removal, we'll edit this task and pay another $500.