| Business | Phone |
| Haz-Mat Containment 511 Wilbur Ave, Antioch 94509 | (925) 776-1600 |
| Trident Environmental-Engineer 110 L St, Antioch 94509 | (925) 706-6931 |
| John Cattolica Antioch 94509 | (925) 755-8859 |
| Lfg Control 4120 Spaulding St, Antioch 94531 | (925) 706-1811 |
| Quest Geo Systems Management Antioch 94509 | (925) 756-1210 |