We show that the scintillation mechanism is negligible in fused silica; it represents less than 1% of two other major components in the photon background. One such component consists of photons created by the delta ray electrons in the fused silica, which in turn can produce Cherenkov light. The second component comes from the reflections of photons from the EPOTEK-301-2 glue/fused silica interface. The reflection occurs because of a slight mismatch of the refraction index between the optical glue and the fused silica. The note will be useful to estimate the photon background multiplicity and provides a recipe how to simulate it in the BaBar Monte Carlo for each passing minim ionizing particle through the DIRC [1] bar. This is a new version of the same note, dated September 19, 2001, and it contains some improvements in the Monte Carlo simulation (see Section 6.2). Show Partial Abstract