According to CCR title 23 UST regulations, when must the local agency be notified before secondary containment testing?

The requirement to notify the local agency at least 48 hours before conducting secondary containment testing is established to ensure proper oversight and coordination. This timeframe allows the agency sufficient opportunity to prepare for the inspection, allocate resources, and ensure that all regulatory compliance measures are observed during the testing process. Secondary containment testing is critical to verifying the integrity of storage systems and preventing environmental contamination, so proper notification ensures that all stakeholders are informed and ready to address any potential issues that might arise during the testing. This proactive communication helps maintain safety standards and regulatory compliance in UST management.