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Section B. 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 fr m date of installation. - 7 1 ,7 1 ` I _ 7-Fo"tClArl � )ViS-c.lI C3,4a*11, dict-I'YJn" a est uses UUULC yvRl-listed in ustry Standard (UL 'fin! Standar 42,2080,208 anYaUbelow grade fuel storage) as well as ��,k� patented stage-proeedr7re in which the leak-detector port is accessed ,,i,,d rS with a system which provides a camera view of the interstice (maintained at,--rj CM2 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 thickne�approv�evdjas sts only evaluate the outer (2ndary containment) wall of ASTs, not the as essel. In conclusion,lhhesemethodbeen eva u are VALENT/pen�c=integrity-testing metho s accordance with Chapter 7-Regional Inspectors Guide/Hybrid AST f 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 �11k-2is iary Containment Test Procedur ori —t is was erformed in 2012`rlr} � n PcCi lra n as i is cons red "dest ive testing" due-n�rnfings�Tyr�� s n� by sub-group/part 8 of APSA committee as is practice can bu 5� n�rarU+ C�mtdIn itrogen blanket introduced 0 <1.01>3.Opsig in accordance with API/STI — I+ is 010 � protocols (actual pressure maintained at 2.0 psig as identified by photos on c ne6 file)into atmospheric vent/balance of outlets capped. Low-pressure nitrogen Pro I�r ynsls, blanket maintained for 1 hour duration with incremental readings ® 15-minute oP 6�mq Fixe{ intervals. No degradation of pressure=leak-tight primary containment. ,(+ h�s lwa ler b) Visual inspection with photos on file confirming no leaks from primary Lfl�inx�able) containment. O` ,Fkc, 'trade v� y c) Recent (2019) evaluations include steel thickness procedures per SM SP001 `i k 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.