EMPLOYEE WAS WASHING SAND INTO A SUMP PUMP AND WAS WALKING TO TURN OFF THE VALVE WHEN SUDDENLY HE LOST CONTROL OF THE HOSE. THE HOSE SPRAYED FULL FORCE ONTO HIS FACE KNOCKING HIS GOGLES AND SA FETY GLASSES OFF. HE SUFFERED A CHEMICAL BURN TOHIS LEFT EYE AND IS RESTRICTED TO WEARING A PATCH ON HIS EYE.