This note presents results of my lab measurements of the wavelength dependency of the absolute value of the internal reflection coefficient, the absolute value of the water transparency during the first year of BaBar physics running, the reflectivity of mirrors and various candidates for the shim material. I also estimate expected number of photoelectrons, mean Cherenkov angle, mean refraction ind ex, and the absolute value of No for three angles of incidence of 0, 60, and 60 deg.