Your hydraulic hammer can be used for many different applications. Currently you can purchase hydraulic hammer tools to drive sheeting, drive post and push pipe. Other tools include slab busters and crusher liner removal tools.
One promising tools is a tank cutter tools. Works on storage tanks you would remove from the ground or above. Further your hydraulic hammer tools can be made longer or shorter.
Finally, your hydraulic hammer can use a plate tamper tool for compaction. They come in 10" and 12" widths.
Any questions call me.