UPDATE 1-Oil and chemical spills from Hurricane Harvey big, but dwarfed by Katrina

NEW YORK/BOSTON, Sept 15 (Reuters) - More than 22,000 barrels of oil, refined fuels and chemicals spilled at sites across Texas in the wake of Hurricane Harvey, along with millions of cubic feet of natural gas and hundreds of tons of other toxic substances, a Reuters review of company reports to the U.S. Coast Guard shows.