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0 0 <br />20"Hg may be tested over the same 2 hour period. Vacuum testing is commonly <br />used because this type of test is affected much less by the rise and fall of ambient <br />temperature. Longer tests such as typically 24 hrs are highly recommended by <br />Bravo and can be reduced to 10" Hg over (24-48 hr Vacuum Test). This assure <br />installations are conducted in a thorough manner. <br />Regulator Testing <br />6. Final Pressure test for regulatory approval is performed typically after all testing is <br />performed on piping and site is ready to be backfilled with pea gravel. Using the <br />factory- installed pressure/vacuum combination gauge apply pressure gradually with <br />manual air pump to the UDC / Vent Transition sump & Tank Sumps 4 PSI and soap <br />ALL fittings and any field joints inside and outside. This is a redundant step to <br />verify that no damage has been done to the sump after it has passed prior testing. <br />7. Typically tests are a minimum 2 hour test in which the air within the interstitial <br />space must acclimate to the outside air temperature. After the first hour then <br />pressure is recorded. Regulator must verify that the sump pressure does not decay. <br />A vacuum test may also be conducted to test the sumps but soaping is not advised <br />as this may pull soap in to sump interstice. Typically sumps vacuum tests to 15- <br />20"Hg may be tested over the same 2 hour period. Vacuum testing is commonly <br />used because this type of test is affected much less by the rise and fall of ambient <br />temperature. <br />Always use Vacuum Hydrostatic Fill Method. This improves fill times and virtually <br />eliminates burping. <br />HYDROSTATIC FIELD INTEGRITY TEST only after passing contractor air integrity <br />test. <br />Properly prepared ahead of time, the quickest a Bravo Double Wall 9000 Series was <br />filled with interstitial fluid using the Vacuum Hydrostatic Fill Method was 15 sec. <br />Hydrostatic Field Integrity Test — After the Vacuum Hydrostatic Fill Method has <br />been applied to fill the sump with interstitial fluid, mark the date, time the test begins <br />and fluid level within the manometer. Allow 1 hour before looking for a change in <br />level. No change in level or no visible leaking means box passes test. <br />Note: The Vacuum Hydrostatic Fill Method and the Hydrostatic Field Integrity Test <br />are two completely different things. The former is a procedure, while the latter is a <br />timed test. <br />Thank You, <br />Sin ely, <br />Don Mukai, P.E. <br />Senior Engineer/ V.P. of Ops. <br />S. Bravo Systems, Inc. Home Office <br />