What type of report must be submitted to DEQ after achieving compliance?

The correct answer involves the submission of a final report showing all groundwater data after achieving compliance. This report is crucial as it provides comprehensive details on groundwater monitoring and any potential impacts the heating oil tank may have had on the surrounding environment. The data contained within this report helps the Department of Environmental Quality (DEQ) assess whether compliance measures have effectively mitigated risks associated with previous tank operations.

This type of report is particularly important because groundwater is a vital resource, and the protection of it is a primary concern for environmental agencies. Ensuring that water quality meets certain standards is a key part of compliance efforts, and the final report serves as a documentation of these efforts and outcomes.

In contrast, the other options do not specifically pertain to the compliance verification process related to heating oil tanks or groundwater monitoring. An end-of-year financial report primarily focuses on financial performance rather than environmental compliance. An incident report highlights specific incidents or accidents, which may not encompass overall compliance effects. An annual progress report is more general and typically outlines broader activities instead of the specific data needed to confirm compliance related to groundwater issues.