| Business | Phone |
| Envirocheck 7052 Orangewood Ave # 2, Garden Grove 92841 | (714) 893-8177 |
| American Analytical 12062 Valley View St, Garden Grove 92845 | (714) 379-0838 |
| E 5 Inc 11358 Knott St, Garden Grove 92841 | (714) 373-3800 |
| Ecm Group 12755 Western Ave, Garden Grove 92841 | (714) 799-2947 |
| Neic 11602 Knott St, Garden Grove 92841 | (714) 891-1518 |
| Patriot Environmental & Labs 7271 Garden Grove Blvd # A, Garden Grove 92841 | (714) 899-8900 |
| Rjl Associates 7111 Garden Grove Blvd, Garden Grove 92841 | (714) 894-3236 |