EE WAS USING WATER HOSE TO WASH DOWN AREA WHEN CAUSTIC LIQUID MATERIAL SPLASHED ONTO HIS PANT LEG JUST ABOVE BOOT AREA. EE WASHED AFFECTED AREA & APPLIED NEOSPORENE. HE SAID HE WAS OKAY & CONTINUED WORKING. ON 8/22 HIS LEG WAS BURNING. WENT TO MED. CLINIC & DOCTOR INDICATED CAUSTIC BURNS ON LEFT LEG. MED. TREATMENT: BURN TREATMENT THERAPY FOR NEXT 7-10 DAYS.