Septic tanks - any recommendations for survey/emptying?

[Ranger 6]

As the title says, I'm looking for a company local to Chobham to carry out a survey and possible works to a septic tank.

I should add that I haven't bought the house yet - this has come about following a survey.

[SVTRick]

I live right near Chobham, what you looking for it to be emptied & cleaned out.
With condition survey ?

[Ranger 6]

I thought you did the more commercial stuff Rick?

Yes, we would like a survey. Since found out that it does comply with legislation as in it doesn't output into a water course. Also the soakaway was redone in 1996, so we think it's sensible to know what we're buying.