** Bluescope BSL.AX slips as much as 7% to A$22.55, lowest since June 26
** Stock marks biggest intraday pct loss since April 7
** Steel producer's FY NPAT plunges 90% y/y
** Coated products business in North American division logs loss, hurt by lower volumes, operational woes, impairment charge
** BSL last down 2.4%, trimming YTD gains to 26.6%