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Lodi SP-001 Inspection | 01-31-22 with a capacity less than 550 gallons is 0.093 inches. All measurements were above the minimum design range. Results are presented in Appendix B. 3.6 Integrity Testing: Double walled ASTs may be integrity tested by observation of functioning liquid level meters / overfill alarm system and insuring the interstices are free of liquids and odors. If water is present, additional steel thickness measurements are required for the secondary shell. If fuel is present, leak testing is required. Tank 9 had diesel fuel present in the interstice and is Required to be removed from service. The tank fuel and interstice levels were equal indicating a leak. For single walled ASTs with capacities less than 1,000 gallons external inspections are sufficient. 3.7 Venting: Some indoor tanks do not have normal vents which are Required. Tanks 1 and 3 have no E-vents, and tanks 4 – 7 have 2-inch “pop-top” fill ports working as E-vents that supply insufficient venting capacity. Emergency vents are Required to be added to the indoor tanks at each of the large ports (labeled “Primary Emergency Vent” on most tanks”). Tank 10/11 and 12 have 2 separate manifolded vents, one terminating at a pressure/vacuum vent on tank 10/11, and the other terminating at an exhaust vent. It is Recommended that an additional p/v vent be added to tank 12 and the manifolded vent piping be disconnected. Tank 9 has a flame arrestor connected to the LLM port acting as a normal vent. Tank 8 has a standard 2” normal vent. The vents are clear of debris and are in good condition. Tanks 10/11 and 12 have emergency vents located on top of the tank for each compartment and each interstice. The emergency vents were observed to be sized correctly and operating as designed. Tank 9 has 2 emergency vents, and the primary vent is seized and could not be freed during inspection. Tank 8 also has 2 emergency vents, but the primary emergency vent is missing a bolt to connect the top. Both tanks emergency vents are Required to be repaired. 3.8 Ancillary Equipment and Piping: Ancillary equipment is supported and protected against physical damage and stress due to settlement, vibration, expansion or contraction. Both inlet and discharge piping provide flexion in case of limited physical displacement. All ancillary equipment is located in the immediate area for inspection prior to use. Ancillary equipment includes: fuel pumps, fuel filters, fuel hoses, exhaust vents, and pressure gauges. 3.9 Overfill Protection and Alarms: Tank 1 has a Liquid level monitor (LLM) in the form of a Roth mechanical level meter. Tanks 3 – 7 all use Krueger at- a-glance mechanical level gauges. These devices do not have associated alarms, and are Required to be added. indoor tanks 4, 6, & 7 also utilize a SMARTank ST90 remote tank monitor. This monitor provides a liquid level to a remote office once a day and is not acceptable for overfill alarms. Outdoor tank LLMs utilize a Morrison brothers clock gauge and a Veeder-Root LLM and alarm system. Both systems appeared to be in good working order. Outdoor tanks do not have interstice leak detectors and are Required to be installed.