Semi-Annual Underground Storage Tank Program Report (Report 6)
The UPAs are required to submit the Report 6 to the State Water Resources Control Board biannually. As part of the Report 6, the UPAs provide the number of active and non-active petroleum and non-petroleum UST systems, the U.S. EPA TCR performance measures, red tag facilities, abandoned UST facilities, and facilities in temporary closure. State Water Board Evaluation staff review Report 6 as part of the CUPA evaluation process for accuracy of data provided, compare TCR with state averages, and ensure Report 6 submittals were provided to the State Water Board before the deadline.
Report 6 – Accuracy of Data Provided
The State Water Board reviews the UPA provided Report 6 for completeness and accuracy of:
- Existing facility count
- Number of petroleum USTs
- Number of USTs reclassified to ASTs
- Number of field constructed USTs
- Facilities inspected
- US EPA Technical Compliance Rate
- UST Compliance Performance Measures
- Red Tags issued
- Temporary closed USTs
- Abandoned USTs
A Report 6 with inaccurate data or incomplete data, or unanswered questions are returned to the UPA for revision.
For UPAs approved for paperless reporting, the UPA certifies that the Report 6 data in CERS is accurate for that reporting period with their paperless Report 6 submission. The State Water Board verifies the accuracy of paperless Report 6 forms by downloading and reviewing the following reports from CERS
- Inspection Summary Report (Report 6)
- Red Tag Facility Details Report
- UST Facility/Tank Data Report
The downloaded reports are saved with the retrieval date from CERS. Report 6 forms with unexplained discrepancies are returned to the UPA for correction and revision.
Revised Report 6 forms are due before the deadline. Late submissions and revisions are subject to findings during the evaluation.
Report 6 – Timeliness of Reporting
The State Water Board emails the Report 6 and associated instructions to each UPA approximately two months before the due date. The specific due date is provided in the initial Report 6 email for each reporting period. Reporting deadlines are reiterated in reminder emails sent to UPAs one month, one week, and a day before the due date. Evaluation staff will review the saved timestamped e-mails and late submittals will result in a finding in the evaluation report. Each year, the Report 6 due dates are:
- September 1 for the January 1 through June 30 reporting period
- March 1 for the July 1 through December 31 reporting period
The CUPA may refer to LG 200 and for further information on Report 6. Forms and instructions, can be found on the UST Leak Prevention website.
Report 6 Statute and Regulation Code Sections:
- CCR, Title 23, Chapter 16, Section 2713(c)
- CCR, Title 27, Section 15290(a)(4)


