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LTJ Testing has been testing construction materials since 2013, and has National Works Approval to test Concrete, Asphalt, and soils, we have three laboratories in Jamaica, one at 9 Studio One Boulevard, Kingston, and another at Johns Hall Montego Bay along with a mobile laboratory at Norman Manly International Airport. We also have one laboratory in St Kitts and Nevis at Canada Estate, and one at Anguilla Airport. LTC (Laboratory Testing Caribbean Ltd)