Abstract: An efficient, cost-saving system and method of designing, installing, testing, and monitoring a secondary containment system for new and existing Above Ground Storage Tanks (ASTs) that is comprised of a protective steel membrane for the floor of the tank, including the floor-to-wall juncture, and the lower portion of the tank shell such that the steel membrane creates one or more interstitial zones between the steel membrane and the tank shell. The steel membrane may be installed zone by zone such that the secondary containment system can encapsulate existing tank features by molding itself around the existing contours, such as repair plates, corners, sumps, etc. Furthermore, a unique testing method using a simple electronic device is provided for on-site testing of the integrity of the weld seams that may be efficiently used after each zone is installed without requiring that the entire tank be evacuated during the construction of other zones.

Abstract: The present device provides an apparatus for securely positioning a medical instrument relative to a patient. The apparatus comprises a drive assembly for moving the medical instrument along a first axis that is substantially parallel to the length of the instrument; an adapter comprising an elongated member and a pair of cooperating hubs for connecting the drive assembly to a positioning system. The cooperating hubs serving to allow separation of sterile from non sterile components. The positioning system comprises two motors each for moving the instrument about a different axis than the drive assembly. The apparatus moving the instrument about a point which is external to the patient. The device further comprises a sterile bag which encloses the positioning system, the bag having at least one opening for receiving an axel from a sterile adapter assembly, thereby rendering the entire apparatus sterile.