There was a download of CHUM 3.1.5 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. This program was originally produced by Piletest.com Ltd. The software relates to Photo & Graphics Tools. The default filename for the program's installer is chum.exe. The following version: 3.1 is the most frequently downloaded one by the program users.
From the developer:
The CHUM (Cross Hole Ultrasonic Monitor) uses the Cross-hole Sonic Logging (CSL) method to perform high-resolution quality control of deep foundations.
The system uses an ultrasonic wave sent from a transmitter to a receiver pulled through water filled access tubes embedded in the concrete. The measured arrival time and energy are strongly dependent on the concrete quality.
You may want to check out more software, such as SqlBuddy, which might be related to CHUM.