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APPLICAB WTO ITEM #2 & #3 The Value d Purchasing a UL LISTED TANK SUMP Several states including California currently allow tank sumps to be either UL listed or certified by a Registered Professional Engineer(PE). Every fiberglass Underground Storage Tank (UST) and Tank Sump offered by Containment Solutions bare the Underwriters Laboratories(UL)mark.Whether a routine plan check or a job-site inspection,the UL mark can be found on the submitted product literature and on physical examination of each tank sump. A UST and containment collar is manufactured and tested at the factory then shipped to the job-site as a completed product,receiving a unique and sequential UL identification mark.Conversely,tank sumps are manufactured and shipped as individual components such as bases,tops and adhesive kits. Each sump is then assembled in the field by the contractor following a set of written installation instructions approved by UL.This process requires every component to be clearly identified with the UL mark.The unique designation signifies that each component meets the strict guidelines that are often overlooked or avoided by companies unfamiliar with developing standards for performance. The Primary Advantages to Purchasing a UL Listed Product: Q UL has developed a set of product performance ` requirements that are used to qualify a sump to receive the UL mark.This guarantees that a UL listed sump meets standards developed by an organization that is both accepted by virtually all Authorities Having Jurisdiction and one which is experienced in developing these types of standards. When a Professional Engineer is used,that individual develops the criteria they will use; consequently, each engineer may use different criteria.They are not as experienced or as consistent as UL in developing the appropriate performance and safety criteria. If the sump is certified by a state PE, there is no subsequent oversight of future sump production. If the sump is UL listed, it is a requirement of UL that the producing plant be inspected routinely by UL The double-wall sump above illustrates the UL mark ona Follow-up Services. This oversight insures that the Containment Solutions double-wall collar and polygon base. sumps are being manufactured with the same materials and methods used to qualify the UL tested A copy of the CSI UL Approval letter for sumps. Tank Sumps is available on the CSI web-site at www.containmentsolutions.com.