2006 New York Code - Presumptions.

 
  § 71-2719. Presumptions.
    1.  Possession  of fifteen hundred gallons or fifteen thousand pounds,
  whichever is less, of an aggregate weight or volume of hazardous  wastes
  or  substances  hazardous  to  public health, safety or the environment,
  shall be presumptive evidence of knowledge on the part of the person  in
  possession  that  the  material  is  a  hazardous  waste  or a substance
  hazardous to public health, safety or the environment; and
    2. Possession of five gallons or fifty pounds, whichever is  less,  of
  an  aggregate  weight  or volume of acute hazardous wastes or substances
  acutely hazardous to public health, safety or the environment  shall  be
  presumptive  evidence  of  knowledge  on  the  part  of  the  person  in
  possession that the material is an acute hazardous waste or a  substance
  acutely hazardous to public health, safety or the environment.