The California Horse Racing Board Track Surfaces Ad Hoc Committee has scheduled three different synthetic track surface presentations. All will be held at Santa Anita Park in the Baldwin Terrace Room. Dates are as follows:  Tuesday, March 21 - Presentation by "Polytrack,"  Tuesday, April 4 - Presentation by "Tapeta Track," and Tuesday, April 11 - Presentation by "Stabilizer Solutions."Owners, trainers, and all interested parties are encouraged to attend to listen, and ask questions about the synthetic surfaces.