Metal-line absorption around $z\approx$2.4 star-forming galaxies in the
  Keck Baryonic Structure Survey
  (Abridged) We study metal absorption around 854 $z\approx$2.4 star-forming
galaxies taken from the Keck Baryonic Structure Survey (KBSS). The galaxies
examined in this work lie in the fields of 15 hyper-luminous background QSOs,
with galaxy impact parameters ranging from 35 proper kpc (pkpc) to 2 proper Mpc
(pMpc). Using the pixel optical depth technique, we present the first
galaxy-centred 2-D maps of the median absorption by OVI, NV, CIV, CIII, and
SIV, as well as updated results for HI. At small galactocentric radii we detect
a strong enhancement of the absorption relative to randomly located regions
that extend out to at least 180 pkpc in the transverse direction, and $\pm$240
km/s along the line-of-sight (LOS, ~1 pMpc in the case of pure Hubble flow) for
all ions except NV. For CIV (and HI) we detect a significant enhancement of the
absorption signal out to 2 pMpc in the transverse direction, corresponding to
the maximum impact parameter in our sample. After normalising the median
absorption profiles to account for variations in line strengths and detection
limits, in the transverse direction we find no evidence for a sharp drop-off in
metals distinct from that of HI. We argue instead that non-detection of some
metal line species in the extended circumgalactic medium is consistent with
differences in the detection sensitivity. We also present measurements of
covering fractions and equivalent widths as a function of projected galaxy
distance. Limiting the sample to the 340 galaxies with redshifts measured from
nebular emission lines does not decrease the extent of the enhancement along
the LOS compared to that in the transverse direction. This rules out redshift
errors as the source of the observed redshift-space anisotropy and thus implies
that we have detected the signature of gas peculiar velocities from infall,
outflows, or virial motions for HI, OVI, CIV, CIII, and CIV.
