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Pursuant to a congressional request, GAO provided information about airports' use of coal tar-based pavement products to rejuvenate and prolong the life of aging pavement and seal it against fuels spills, focusing on: (1) whether the sealer/rejuvenator products used on federally funded projects comply with the guidance in the Federal Aviation Administration's (FAA) Engineering Brief 44 (EB-44); and (2) airports' experiences in using these products.

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