[Trilogy]

I am new to the forum and I am looking for some advice and information regarding disused unddrground slurry tanks. The tanks are on land which borders mine and we may be interested to purchase. They are very large ( 25m x 5m and at least 5m deep) and not thought to have been used for years about 10 years. I have no information on the condition in which they were left or the construction. We have removed the inspection hatch from one and it is flooded.

I am concerned that even if they are not contaminated they could be a danger to children. I think I know what should be done with them, drain, bottom and fill , but who does this type of work and what is the likely cost? Should I be alerting some official about possible dangers? Any help welcome please.

[Still playing with tractors]

Your on the right track.

As with any tank, you will need to puncture the bottom and lower sides to allow any fluid build up to escape, this can be done via a pecker on an excavator or concrete cutting. You could install a drain pipe before backfilling.
The material used to backfill should be to an engineering spec, anything from Type 1 to 6F2 would be fine. it must be layered in 200mm layers compacted with a whacker or better a roller. this will stop settlement.

If you have land to spread the slurry/water then best to do so, but not near to a watercourse and best to check with the EA/SEPA for times of year in your area.

All of this would be best done by an agricultural contractor, do you have a local ring in your area?

your main costs is the back fill material, type 1 is about £300 for 20t, but try and see if you can get recycled material like crushed brick to 6F2 that will save you a fortune, or road scalpings.

if you need anymore help, feel free to PM me.

[Trilogy]

Thanks for that great advice :-)