15-0713 v2.X Fire Tank Liner

Question:

The Potomac Watershed Study Center: Grass Building has a sprinkler system that is supported by a 30,000 gallon fire suppression storage tank on site because of its remote location. The project team requested that the tank manufacturer use alternatives to a number of PVC based components, one of which was the tank liner made out of polyethylene. After the tank was filled the installer noticed that the liner had begun to fail where it was attached to the inside of the tank as well as at the seams. It is the recommendation of the manufacturer that the polyethylene liner be replaced with the industry standard PVC liner. Please see attached letter from the manufacturer.We would like to request an exception to follow the manufacturer’s recommendation to use the PVC liner because the installed Red List compliant component has unfortunately failed and does not appear to be equal in performance. As this is a vital component of the life safety system for the project, we do not want to replace the liner with the same material as it could present issues later to the project even if initially it functions properly again. Additionally the installer won't warranty the original material and hasn't been able to identify another non-pvc option. A timely response would be greatly appreciated as addressing this issue will allow us to receive our Certificate of Occupancy. Thank you for your consideration.

Answer:

In this limited circumstance, because the project team has installed a Red List compliant product that has failed - therefore demonstrating its inability to satisfy the projects' performance requirements - it is acceptable to replace the polyethylene liner with PVC. The Institute is creating the following new exception:

I11-E23 Performance Failure in Systems (LBC 2.0/2.1) I10-E20 Performance Failure in Systems (LBC 3.0)
If a project team replaces a Red List ingredient or component with a compliant alternative that subsequently results in a performance failure of a major system (e.g. fire suppression), the team may replace the compliant component with a standard, non-compliant component or ingredient.


Post ID 3034

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