| Business | Phone |
| Americhem Testing Laboratory 1761 N Batavia St, Orange 92865 | (714) 921-1550 |
| G & M Compliance Inc 154 S Cypress St, Orange 92866 | (714) 628-1020 |
| Soil & Plant Laboratory 1594 N Main St, Orange 92867 | (714) 282-8777 |
| Universal Laboratories 692 N Cypress St # B, Orange 92867 | (714) 744-1558 |