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SWRCB, January 2002 Page of 4. TANK ANNULAR TESTING Test Method Developed By: X Tank Manufacturer ❑ Industry Standard ❑ Professional Engineer ❑ Other (Specify) Test Method Used: ❑ Pressure ❑ Other (Specify) X Vacuum ❑ Hydrostatic Test Equipment Used: Gast Vacuum Pump/Vacuum Gauges in Hg. Tank # 1 Tank # 2 Is Tank Exempt From Testing? ❑ Yes x No ❑ Yes x No Equipment Resolution: Tank # 3 ❑ Yes x No -1/2-30Hg. Tank # 4 ❑ Yes x No Tank Capacity: 10K 12K 12K l OK Tank Material: Fiberglass Jacketed DW Steel Jacketed DW Steel Jacketed DW Steel Tank Manufacturer: XERXES Modern Welding Modern Welding Modern Welding Product Stored: Supreme 91 Regular 87 Regular 87 Diesel Wait time between applying vacuum and starting test: 30 Minutes 30 Minutes 30 Minutes 30 Minutes Test Start Time: 10:35 9:45 9:55 9:30 Initial Reading (RI): -IOHg. -5 Hg. -5 Hg. -5 Hg. Test End Time: 11:35 10:45 10:55 10:30 Final Reading (RF): -101-1g. -5 Hg. -5 Hg. -5 Hg. Test Duration: 1 Hour 1 Hour 1 Hour 1 Hour Change in Reading (RF -RI): 0 Hg. 0 Hg. 0 Hg. 0 Hg, Pass/Fail Threshold or Criteria: ➢ -2 Hg. No Loss in Hg. No Loss in Hg. No Loss in Hg. Test Result., ' :: X, Pass ❑Fail ` X Pass C1 Fail X Pass ❑ Fal X Pass 0 Fail Was sensor removed for testing? Yes X No NA X Yes No NA X Yes No NA X Yes No ❑ NA Was sensor properly replaced and verified functional after testin ? Yes No X NA X Yes No X NA X Yes ❑ No NA X Yes ❑ No NA Comments — (include information on repairs made prior to testing, and recommended follow-up for failed tests) ' Secondary containment systems where the continuous monitoring automatically monitors both the primary and secondary containment, such as systems that are hydrostatically monitored or under constant vacuum, are exempt from periodic containment testing. {California Code of Regulations, Title 23, Section 2637(a)(6))