The startDate on a SiteRegulatory record marks when the regulatory program formally began for the site — for example, the date a consent order was signed, the date an UST release was reported, or the date a RCRA corrective action was initiated by the leadAgency. This date anchors the program timeline, and combined with endDate, defines the full regulatory oversight window. Report due dates and milestone schedules are often expressed relative to startDate.
Technical section
Data model, API, and internals — visible to developers.