F.3d 1117 (9th Cir. 2000); Hawkins v. Stables, 148 F.3d 379 (4th Cir. 1998); Motley v. Marathon Oil Co., 71 F.3d 1547 (10th Cir. 1995); Christman v. Brauvin Realty AdvisorS, Inc., 185 F.R.D. 251 (N.D. III. 1999). In making that showing, blanket assertions of the privilege are not proper—the assertion must be made on a