The Department of Toxic Substances Control (DTSC) is seeking information about contractors who can provide monitoring services for between 400 and 1000 DTSC sites throughout California that have institutional controls in place. The monitoring system must include services such as monitoring "call-before-you-dig" or "one-call" services, construction proposals, and other available sources of information. The contractor must also alert DTSC in advance of planned activities that could impact the site or the integrity of the environmental restrictions on a site. • The contractor must have two years of experience performing work of this nature. • The contractor must be licensed to do business in California and obtain all required licenses. • The contractor must provide electronic notification to DTSC project staff of all planned events where a DTSC site may reasonably be impacted. • The contractor must provide active hyperlinks to the Institutional Controls (ICs) and the EnviroStor public profile (webpage).