| Business | Phone |
| Qualitechs Environmental Inc 20030 Century Blvd # 210, Germantown 20874 | (301) 972-5713 |
| Potomac Environmental Svc 12205 Peach Crest Dr, Germantown 20874 | (301) 540-9064 |
| Enos & Enos 15708 Pagano Ln, Germantown 20874 | (301) 926-4026 |
| Gem Technology 20251 Century Blvd # 4, Germantown 20874 | (301) 428-7600 |
| Marylanders For A Second Xing 19008 Jamieson Dr, Germantown 20874 | (301) 515-4926 |