Why Hasn the County Closed Sites Which Have Historically Leaked?
Sites with evidence of past contamination have upgraded their tank storage systems with double wall containment and leak detection programs. We are dealing with “old discharges” and the new upgraded tank systems are not likely contributing to the existing problem. However, the Department continues to perform on-going inspections of all UST facilities to monitor the effectiveness of the upgraded systems and to insure compliance with the “double containment” deadline of December 22, 1998. There has been a recent media reference claiming that “…new tank systems can leak up to 2.5 gallons a day and still be “in compliance” with the new regulatory requirements…” That statement is simply not accurate. Rather, this is in reference to the expiring UST regulations for single walled tanks which provide for a temperature correction factor for tank integrity tests as gasoline expands and contracts. By regulation, tank integrity testing is required on all single walled tanks until the site owne
