2006 New York Code - Oil Separators.

 
    §  27-4075 Oil separators.  a. No permit for a storage garage shall be
  issued for any premises storing more than  four  motor  vehicles  unless
  such  premises  is equipped with an oil separator, trap or other similar
  apparatus attached to the house drain.
    b. Oil receptacle. The oil receptacle of an  oil  separator  shall  be
  emptied   as  often  as  may  be  necessary  to  prevent  the  oil  from
  overflowing; and such oils as are recovered from the separator shall  be
  removed  from the garage within twenty-four hours after being taken from
  the separator.
    c. Sewer connection. Each oil separator  shall  be  connected  to  the
  house  drain,  and shall be so arranged as to separate all oils from the
  drainage of the garage.
    d. Waste oils. All oils spilled on the floor  of  a  garage  shall  be
  removed  by  sponging  or swabbing, and poured into the drain leading to
  the oil separator.
    e. Exemptions. The provisions of this section shall not apply to those
  parts of the city included in the fire district, as defined  in  section
  27-293 of this title, where no permanent sewers are laid.