Take the C12 to Amposta.  When you get to the roundabout on the edge of the town, take the 1st exit (dir Masdenverge/Santa Barbara).  On your right, pass the crematorium, a scrap yard and a block of almacens (Masanes, Estelle etc).  Then get into the slip lane but don't take the first exit into the gas station but the second right hand turn (signpost Tosses).  Go straight on into the estate until you come to a roundabout.  Turn right here and then turn into the first bay on the left.  Isolana is a big green shed on the left in that bay.