HELP! I had railroad ties put in as a retaining wall 8 months ago and whenever the weather is warm or the sun shines on them the black oil oozes out and the terrible smell comes right into the house. there must be some way of cleaning, or growing something over them to block out that poison. i just did'nt know.
we are desperate for advise and do not have the $ to redo the whole job.
anyone???