Corwin
Member
- Location
- Tacoma, WA, Pierce
I have a question about a solvent storage room on site at our plant. First, here are some basic facts about the room:
My question is: is this room adequately ventilated? After some recent construction, we removed one vent/fan (not sure which) on the east side of the room, but did not replace it. The users of this room are currently holding open the south door to allow for better ventilation of the area, which does not seem right to me. My assumption is they leave this door open due to improper ventilation in the room.
After reading NFPA 30, it appears that we may be in violation.
It is my understanding from NFPA 30 that we?ll need to install a make-up inlet on the opposite side of our existing vent (north wall), discharge our exhaust ventilation outside the building (if not already being done), and provide 1 CFM of exhaust air for each square foot of floor area, or 150 CFM, whichever is greater. Can you please correct my assumption, or direct me down the right path?
Any advice you can provide would be helpful.
Thank you
- (2) 55 gallon metal drums of NMP (Class IIIA liquid) are stored in here. Both grounded
- (1) 55 gallon metal drum of waste material (NMP & MEK (Class IB liquid) mixed with epoxy resin). Also grounded
- (3) 30 gallon storage lockers (JustRite 893020) containing a mixture of 5 gal NMP & MEK in approved storage vessels. It can be assumed that these are all full and there is a 50/50 mix of the two solvents (not mixed in the same vessel)
- Overall room size is approximately 12? x 15?, and has a door on both the north side and the south side of the room (normally closed)
- The room has a drainage trench around it?s (interior) perimeter
- The room is enclosed by the rest of the building
- There is a suction vent (approximately 6? x 12?) on the south wall about 6? from the floor, as well as a 24? x 24? pressurized (I believe) vent on the ceiling very close to the south wall
My question is: is this room adequately ventilated? After some recent construction, we removed one vent/fan (not sure which) on the east side of the room, but did not replace it. The users of this room are currently holding open the south door to allow for better ventilation of the area, which does not seem right to me. My assumption is they leave this door open due to improper ventilation in the room.
After reading NFPA 30, it appears that we may be in violation.
It is my understanding from NFPA 30 that we?ll need to install a make-up inlet on the opposite side of our existing vent (north wall), discharge our exhaust ventilation outside the building (if not already being done), and provide 1 CFM of exhaust air for each square foot of floor area, or 150 CFM, whichever is greater. Can you please correct my assumption, or direct me down the right path?
Any advice you can provide would be helpful.
Thank you