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Skylands Testing, LLC

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Mr. Eugene Schwarzrock, P.E., M.ASCE

Skylands Testing, LLC

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The older version of this circular says to use high-pressure water blasting or biodegradable chemicals. https://www.faa.gov/documentLibrary/media/advisory_circular/150-5380-6B/150_5380_6b.pdf Funny that the newer version doesn't suggest how to remove them. I have no prior experience with this but, ...