| Business | Phone |
| Christina Engineering 350 W 9th Ave, Escondido 92025 | (760) 839-2229 |
| Drewelow Remediation 1523 Sterling Ct, Escondido 92029 | (760) 546-6456 |
| Ceramco Llc 640 S Andreasen Dr, Escondido 92029 | (760) 737-7602 |
| Compaction Engineering Inc 1305 Simpson Way # D, Escondido 92029 | (760) 480-1116 |
| D L Engineering & Controls Inc 2904 Oak Hill Dr, Escondido 92027 | (760) 745-4068 |