EES PERFORMING DEMOLITION DUTIES TO DISMANTLE AN IDLE PLANT, WHICH WAS PRESENTED TO US AS THROUGHLY FLUSHED AND DRAINED, NUMEROUS TIMES, WER4E SPRAYED WITH CONCENTRATED CAUSTIC SODA SOLUTION W HEN THE BROKE INTO A LINE THAT HAD NEVER BEEN FLUSHED. EES RECEIVED CHENICAL BURNS TO FAC, NECK AND TORSO AS A RESULT OF INCIDENT. PLANT NOW CONFIRMS SOME LINES WERE NOT FLUSHED.