| Business | Phone |
| Boc Gases 701 Mcculloh St, Baltimore 21201 | (410) 728-6624 |
| Praxair Distribution Inc 8124 Norris Ln, Baltimore 21222 | (410) 288-0303 |
| Praxair Inc 7350 Carbide Rd, Baltimore 21226 | (410) 360-0500 |
| Boc Gases 6967 Golden Ring Rd, Baltimore 21237 | (410) 682-5991 |