I got this message from Mike .A from the forum, so I was going to post it on this. I would like to thank all people who have replied. It's answers like this you could never find in a book
As you may know that whole sculpted hill area to the East of your apiary site was one giant landfill. I was talking to friend of mine yesterday about keeping bees near it and he said it should be fine now they have finished and its got tons of earth and grass over it. You may of noticed dotted all over it was the top of several pipes (not sure if they are still there now) but they were monitoring the Co2 and methane emissions for some time.
At the time it was open it stank if the wind was blowing the wrong way. Only one way to find out and that is try it and see how they do down there.
PS. My friend also said they will fly across water provided its not too wide, he has an apiary near Netley on the waters edge and they fly over Southampton Water to get to the edge of the New Forest, so the small patch of water across to Potchester Castle and beyond is not problem.
If anybody is interested, just below the red dot on the map is a stretch of water. This was used for the navy to test torpedoes.