In this report we test for reliability any signatures of field galaxies clustering in the GRB 021004 line of sight. The first signature is the BTA and Hubble GRB 021004 field photometric redshift distribution with a peak at z ~ 0.5 estimated from multicolor photometry. The second signature is the MgII 2796,2803 absorption doublet at z ~ 0.5 in the GRB 021004 afterglow spectrum. The third signature is some inhomogeneity in Plank + GRB 021004 fields. And the fourth signature may be the galaxy clustering with an effective redshift of z = 0.5 from the Baryon Oscillation Spectroscopic Survey (BOSS), which is a part of the Sloan Digital Sky Survey III (SDSS-III)