Best way to remove 3’ of bed rock to burry septic tank?

[4570Man]

So I need to install a septic tank and the bedrock isn’t much over 2’ deep maybe 3’ tops. I could add some dirt to the top but not enough. Is something like that in the range of Dexpan or a handheld jackhammer? Should I look into renting a mini excavator with a rock breaker? Any other ideas? This system has to be inspected so burying anything besides a proper tank isn’t an option.

 

[Diggin It]

So I need to install a septic tank and the bedrock isn’t much over 2’ deep maybe 3’ tops.

2-3 feet below the surface? How thick is it?

 

[4570Man]

The bed rock is 2-3 feet below the surface but I need a hole 6’ deep. The top foot of the rock is pretty soft so if I’m lucky I’ll be able to dig 4 foot deep but I haven’t started that project yet. As to the thickness I have no idea. That doesn’t really matter.

 

[RNeumann]

I had the rock here blasted. $2400/day.

If that isn’t an option they make skid steer and excavator mounted hammers. Because of the underground nature of the rock I’d go for the excavator. Renting one for a day vs hiring it done will be close in cost- get quotes for both.

How’s the leach field?

 

[4570Man]

It’s only like 30 feet from other houses so I don’t think blasting is an option. I think the leech will be fine.

 

[Diggin It]

Have you talked to the plumbing/septic inspector to see how they handled other similar situations?

 

[Streetcar]

What type of rock?

 

[4570Man]

Sand stone.

 

[ruffdog]

It sounds like a civil, wastewater, or septic engineer should be involved.

 

[4570Man]

They’ve already given the specs I have to meet for the leech field. They don’t care how it gets buried.