7, 18 (2007); John Morrell & Co., above, 304 NLRB at 899; Pullman Building Company, 251 NLRB 1048 (1980), enfd. 691 F.2d 507 (9th Cir. 1982) (table); Burgess Construction, 227 NLRB 765, 766 (1977), enfd. 596 F.2d 378 (9th Cir. 1978), cert. denied 440 U.S. 940 (1979). Knowledge may be imputed if the charging party would