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Section 8. Periodic Integrity Testing Schedule (2009 revision) I. Per 40 cfr 112.7(federal) and APSA (California jurisdiction) as well as Title 22 under California Environmental Protection, it is a requirement to conduct periodic integrity testing of each tank (including primary and secondary containment chambers) as well as publish any methodology for conducting the tests at a minimum of ten years from date of installation. The Test Protocol uses a UL/ULC/SWRI-fisted industry Standard (UL Standard 142,2080,2085 and 2245 at/below grade fuel storage) as well as patented 2-stage procedure in which the leak-detector port is accessed with a system which provides a camera view of the interstice (maintained at SPCC corporate office files) and a hydrocarbon sensor which discriminates liquid in the interstice as either water or petroleum product. In addition, per STI SP001, a third complimentary procedure of steel thickness is conducted due to the proximity of navigable waterways. NOTE: Steel thickness tests only evaluate the outer (2ndary containment) wall of ASTs, not the primary vessel. In conclusion, these methods have been evaluated and are approved as EQUIVALENT periodic-integrity-testing methods in accordance with Chapter 7-Regional Inspectors Guide/Hybrid AST technology as a matter of Sound Engineering Practices as certified by the PE of record on this revision of the spcc plan. Primary Containment Test Procedure for Tank #1 UL Standard 142 no serial # a) camera b) hydro-carbon sensor Secondary Containment Test Procedure for Tank#1 a) camera b) hydro-carbon sensor Primary Containment Test Procedure for Tank #2—this was performed in 2012 and is NO longer utilized as it is considered "destructive testing" due to findings by sub-group/part B of APSA committee as this practice can burst aging weld- seams in primary/secondary chambers of the AST (unlisted/no serial #) a) Nitrogen blanket introduced @ <1.0/>3.Opsig in accordance with API/STI protocols (actual pressure maintained at 2.0 psig as identified by photos on file)into atmospheric venVbalance of outlets capped. Low-pressure nitrogen blanket maintained for 1 hour duration with incremental readings @ 15-minute intervals. No degradation of pressure=leak-tight primary containment. b) Visual inspection with photos on file confirming no leaks from primary containment. c) Recent (2019) evaluations include steel thickness procedures per STi SP001 protocols. Only the outer/external wall of the AST may be evaluated using this procedure. Use of ongoing low-pressure (see item #a) has been determined by UUULC to constitute "destructive test methodology" due to damage to weld- seams from positive and/or negative pressure applied to the interstice or primary vessel.