1. a) Apparatus

   1. 1) Ringstand approximately 10 cm in diameter
   2. 2) 100 ml graduated cylinder
   3. 3) 400 micron conical paint filter approximately 15 cm in diameter
   4. 4) Watch glass.

2. b) Procedure

   1. 1) Collect a 100 ml representative sample of the hazardous waste.
   2. 2) Mix the sample thoroughly.
   3. 3) Bring the sample and the filter to a temperature of not less than 20 degrees C (68 degrees F) and to ambient pressure.
   4. 4) Place the filter in the ringstand.
   5. 5) Place the sample in the filter and cover with the watch glass.
   6. 6) Maintain the sample and the filter at the temperature and pressure specified in paragraph (3) for five minutes.
   7. 7) Observe whether any fluid portion of the sample drops from the bottom of the filter during the period of time specified in paragraph (6).

(Source: Amended at 10 Ill. Reg. 4864, effective March 7, 1986)