  This paper presents a summary of beam-induced backgrounds observed in the
ATLAS detector and discusses methods to tag and remove background contaminated
events in data. Trigger-rate based monitoring of beam-related backgrounds is
presented. The correlations of backgrounds with machine conditions, such as
residual pressure in the beam-pipe, are discussed. Results from dedicated
beam-background simulations are shown, and their qualitative agreement with
data is evaluated. Data taken during the passage of unpaired, i.e.
non-colliding, proton bunches is used to obtain background-enriched data
samples. These are used to identify characteristic features of beam-induced
backgrounds, which then are exploited to develop dedicated background tagging
tools. These tools, based on observables in the Pixel detector, the muon
spectrometer and the calorimeters, are described in detail and their
efficiencies are evaluated. Finally an example of an application of these
techniques to a monojet analysis is given, which demonstrates the importance of
such event cleaning techniques for some new physics searches.
