Mae Cyfoeth Naturiol Cymru, Valero a phartneriaethau amlasiantaeth wedi parhau i weithio gyda'i gilydd i arolygu'r ardaloedd yr effeithiwyd arnynt ac maent yn fodlon eu bod wedi dal cymaint o’r olew â phosibl.
Natural Resources Wales (NRW), Valero and multi agency partners have continued to work together to survey the affected areas since the incident and are satisfied they have contained as much oil as possible.