Broad Spectrum Disinfectant
Chlorine compounds are probably the most widely used disinfectants in the laboratory.  You can easily prepare an inexpensive, broad-spectrum disinfectant by diluting common household bleach.  In the case of large or concentrated spills of infectious agents, a higher level of chlorine is needed to be effective in destroying the microorganisms.  Use a 1:10 dilution (5,000 ppm of free chlorine) and flood the contaminated area with the solution.  Alternatively, you can mix the disinfectant with the spilled material.  This higher concentration is more suitable for porous surfaces that may harbor organisms in tiny cracks or pits.  (Citation: Northwestern University, ORS Laboratory Safety, Section 7.5.1 Sterilization, Disinfection, and Decontamination)
(http://www.nwu.edu/research-safety/labsafe/cbsl7.htm)