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.. .. C) Localized environmental and/or weather conditions may cause the interstitial fluid to evaporate at a more noticeable rate than other areas. In this case, you should determine whether the liquid loss is recent or if it has been occurring over a long period of time. D)There also exists an issue with some Tank Sumps where the lack of an atmospheric manometer to equalize sump interstice pressures exacerbates the chance of a false alarm and/or fluid spillage. To minimize these alarms, you can install our new low-profile atmospheric manometer for the B400 Series DoubleWall tank sumps. It's part number is"ATM-400-LP" and can be easily installed into the test port opposite the manometer to assist in equalizing the sump interstice pressures. Testing: For Sumps installed prior to 2005 the interior walls may be gel-coated white and your options for testing may be limited. You can conduct a 4 PSI air/soap test on the interior but you will need to gain access to the outside of the sump to conduct testing. If you find yourself on the outside, and are fairly sure the penetrations are the culprit then you may think about installing the Retrofit-SD-AB fittings as outlined below so that you would not need to disconnect any product or conduit lines. For Sumps installed during 2005 or later, the interior walls should be a natural and translucent color. In this case the point of leak(s)can be pinpointed by use of our Advanced Leak Detection Procedure(ALDP as found in the product instruction manual). This procedure is a mandatory step in the initial installation of all DoubleWall containment sumps. It can only be performed by a DoubleWall-Certified Bravo installer/maintenance technician. Repair options:We have several options for DoubleWall Sumps to avoid the need to break concrete, while still protecting our environment. Option t) Replace the failing flexible product and/or conduit boots with an all-fiberglass split retrofit fitting. The F-Series Retrofit-SD-AB fitting at www.sbravo.com/fs allows you to remove flexible entries and permanently seal the pipe or conduit to the sump wall without disconnecting the lines. This fitting requires the concrete to be broken as the installer needs clear access to both sides of the sump wall. This method is available to all Bravo DoubleWall-Certified installers with the prerequisite of completion of our Retrofit certification test. Option 2) If you are breaking concrete and replacing any pipe or conduit, but had blue line penetrations, we make an F-Series BLR fitting that is sized to fit the hole a Blue Line entry leaves behind after removal. With this product, you do not have to fiberglass the hole shut (which then creates a single wall area therefore voiding AB-2481 compliance) or voiding any sump warranties that are still in effect. This is a valid option for only select situations. Option 3)The second option does not require you to break ground, and can be installed from within the sump and without disconnecting any product or conduit lines. It is the F-Series D-BLR-S. BLR stands for Blue Line Retrofit and was the first retrofit fitting product developed exclusively to combat those fittings that were systematically failing. This product line now can be made for retrofitting any flexible entry fitting and help avoid the breaking of concrete. Only a Bravo Certified Specialist can install this product line. Option 4) The last and final option is to replace the sump in question. Make sure you don't choose rubber entries if you do. Part of our Mission Statement: It is in line with the mission of S. Bravo Systems, Inc. to produce products that help our customers avoid the need to break ground now and in the future. To remain true to this all of our sumps are designed to be installed once, without the need of repair. In addition, we produce several lines of application-specific fiberglass retrofit fittings and tank sump covers to take care of existing issues without the need to break ground. For certification requirements:See page 2 of any instruction manual. For a list of our F-Series All-Fiberglass Retrofit Fittings:go to www.sbravo.com/fs For instruction manuals:go to www.sbravo.com/install For an explanation of certification classifications: go to www.sbravo.com/class For a list of Bravo-Certified contractors: go to www.sbravo.com/certlist http://www.sbravo.com/faq.htm