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Ton 34 recently transitioned from non-absorbing quasar into a BALQSO.Here, wereport new HST-STIS observations of this quasar. Along with CIV absorption, wealso detect absorption by NV+Ly alpha and possibly OVI+Ly beta. We follow theevolution of the CIV BAL, and find that, for the slower outflowing material,the absorption trough varies little (if at all) on a rest-frame timescale of 2yr. However, we detect a strong deepening of the absorption in the gas movingat larger velocities (-20,000 - -23,000 km s-1). The data is consistent with amultistreaming flow crossing our line of sight to the source. The transversevelocity of the flow should be few thousand km s-1, similar to the rotationvelocity of the BLR gas (2,600 km s-1). By simply assuming Keplerian motion,these two components must have similar locations, pointing to a common outflowforming the BLR and the BAL. We speculate that BALs, mini-BALs, and NALs, arepart of a common, ubiquitous, accretion-disk outflow in AGN, but becomeobservable depending on the viewing angle towards the flow. The absorptiontroughs suggest a wind covering only 20% of the emitting source, implying amaximum size of 10^-3 pc for the clouds forming the BAL/BLR medium. This isconsistent with constraints of the BLR clouds from X-ray occultations. Finally,we suggest that the low excitation broad emission lines detected in the spectraof this source lie beyond the wind, and this gas is probably excited by theshock of the BAL wind with the surrounding medium.

Hubble Space Telescope Observations of BALQSO Ton 34 Reveal a Connection between the Broad Line Region and the BAL Outflow