EE IS NOT SURE OF EXACT DATE OF ACCIDENT. AROUNDMID OCTOBER HE WAS CHANGING AN ACCETYLENE TANK. HE WAS TAKING THE EMPTY TANK TO THE STORAGE AREAAND INSTALLING THE FULL TANK BACK ON THE TRAILER SINCE THERE WAS NO ONE IMMEDIATELY AVAILABLE TO HELP HIM, HE TRIED LIFTING THE 200 LB TANK BY USING THE TRAILER TONGUE TO SUPPORT ONE END WHILE LIFTING HE OTHER INTO PLACE.