1) Target

The site location, boundaries of the institutional control and the engineered control are entered by the environmental professional or responsible party. Parties to be alerted, and any follow-up actions to be taken by Terradex are also recorded. Terradex stores a scanned copy of the deed restriction. After the set-up is complete, Terradex generates an institutional control implementation plan as an Adobe® PDF.

At right, two institutional controls are mapped into the Terradex system. The smaller (red) represents an enforceable institutional control around an engineered control at the property. The larger (blue) institutional control is advisory and extends off-site, bounding a regional groundwater contamination plume.

2) Monitor

Terradex continuously collects land use and activity data, including records of real estate transactions, building permitting, construction bids, excavation clearance notices, water wells permits, and sensitive occupancy permits such as schools or day care. Terradex uses a national network of commercial and public suppliers for land activity records and for local physical records review. Data indicating a change in land activity or use at or near the boundary of an institutional control generates a “monitoring event.” Terradex screens each monitoring event to the use and activity limitations of the institutional control. When a potential conflict is found, Terradex opens an “alert” to flag the potential conflict in advance.

3) Alert

An “alert” is transmitted BEFORE the prospective land activity or use violates the institutional control. Designated contacts, (typically the environmental professional or responsible party), receive the alert via e-mail. The “alert” is closed after the conflict is mitigated or found unlikely to be realized. All action steps are recorded in the system. Customized reports can be provided to parties requesting proof of monitoring and appropriate care.

The alert map at right shows a potential excavation into a residual groundwater plume. The location of the planned excavation (red line) is shown relative to the boundary of the environmental notice associated with the groundwater plume (blue area). An alert also provides detailed information on the proposed land use or activity and on the institutional or engineering control.