The Contractor must monitor between 400 and 1000 Department of Toxic Substances Control (DTSC) sites throughout California that have institutional controls in place. The monitoring system must include the following services: a. Monitoring “call-before-you-dig” or “one-call” services; construction proposals; dredging permits; real estate listings; sensitive use permits; California Environmental Quality Act (CEQA) projects of both statewide and local significance; municipal permits, planning or zoning changes; and other available sources of information; b. Alerting DTSC in advance of planned activities which could impact the site or the integrity of the environmental restrictions on a site. Such impacts include, but are not limited to, disturbances of remedial components, changes in land use, property transactions which could potentially affect contaminant location, containment systems, the location of underground remedy components, and exposure of the public, workers, or ecological resources to remaining contamination at a site; c. Electronic notification to DTSC project staff of all planned events where a DTSC site may reasonably be impacted; and d. Provide active hyperlinks to the Institutional Controls (ICs) and the EnviroStor public profile (webpage). Envirostor is DTSC's data management system that includes an online repository for documents for site cleanup projects (https://www.envirostor.dtsc.ca.gov/public/deed_restrictions).