NYCAC

Article 20 - OCCUPANCIES INVOLVING STORAGE OF NITRIC ACID¶

Section 27-518¶

Section 27-518

  §  27-518  Application.  This article shall apply to the construction,
alteration and use of buildings or spaces wherein nitric acid is stored.

Section 27-519¶

Section 27-519

  §  27-519  Location. Carboys containing nitric acid shall be stored in
storage vaults.

Section 27-520¶

Section 27-520

  § 27-520 Construction requirements. (a) Vaults shall be constructed of
incombustible acid-resistant material with a fire resistance of at least
one hour.
  (b)  Doors  opening  into  such  storage vaults shall be self-closing,
noncombustible fire doors with a  fire-protection  rating  of  at  least
three quarters of an hour.
  (c)  Vault  floors  shall  be  constructed  of  acid-resistant  brick,
concrete treated with sodium silicate or other acid-proof  material  and
shall  incorporate a dike constructed of the same material, whose height
shall be adequate to contain the acid plus  the  neutralizing  substance
that would be necessary to neutralize said acid plus six inches.
  (d)  The  floor  shall  be provided with a valved drain which shall be
connected to the drainage system in accordance with the requirements  of
subchapter sixteen of this chapter.

Section 27-521¶

Section 27-521

  §  27-521  Ventilation.  Mechanical  ventilation  systems  for storage
vaults shall be adequate to effect ten  complete  air  changes  per  hr.
Exhaust  shall be taken from within twelve inches above the level of the
top of the dike. The exhaust system  shall  be  independent  of  exhaust
systems  serving  other  parts  of  the building and the openings to the
outdoors  shall  be  located  in  accordance  with  the  provisions   of
subchapter thirteen of this chapter for system conveying vapors.