The thresholdSetId on a ReportPackage tells Piper which regulatory standard to apply when determining whether analytical results exceed compliance limits. Different sites have different applicable standards — state drinking water MCLs, EPA maximum contaminant levels, site-specific cleanup goals, or risk-based screening levels. Selecting the correct thresholdSetId ensures figures and exceedance tables in the report reference the limits that your permit or consent decree requires. Applying the wrong threshold set could underreport or overreport exceedances in the submittal.
Technical section
Data model, API, and internals — visible to developers.