| Business | Phone |
| Bennett-Staheli Engineers 90 Blue Ravine Rd, Folsom 95630 | (916) 294-0095 |
| Remediaiton Group 126 Chambersburg Way, Folsom 95630 | (916) 983-9366 |
| Wilson Composite Technologies 1004 River Rock Dr # 240, Folsom 95630 | (916) 989-4812 |
| Blg 299 American River Canyon Dr, Folsom 95630 | (916) 988-9825 |
| Frisch Engineering Inc 110 Blue Ravine Rd # 101, Folsom 95630 | (916) 353-1025 |
| James Transportation Group 1120 Iron Point Rd, Folsom 95630 | (916) 608-4900 |
| Lind & Assoc Po Box 1633, Folsom 95763 | (916) 984-1737 |
| Mc Laughlin & Mc Laughlin Folsom 95630 | (916) 987-0189 |