200. Entries on this list with a number (ex: Ontario – 5) originate as from reports that provide country-scale (or province-scale) tabulations, but for which the location of the sites can’t be corroborated from other sources (So: one report may indicate that 5 facilities were built in Ontario, but review of other reports, conference proceedings and publications only confirm locations for 4). In these instances, the numbered placeholder is retained while recognizing that it’s very possible the report from which the tabulated listing originated was in error. All information reviewed for this compilation is publicly available, either from actual libraries or via the Interwebz. Nothing fancy or tricky – just a list I compiled over the years I worked on this industry. If you want to know more (than you ever wanted to know) about the chlor-alkali industry, here’s a start (TheSpiritLevel), although there’s all kinds of good info on-line also. This was all about trying to make sense of it all.