| Business | Phone |
| Kier & Wright Civil Engineers 1233 Quarry Ln # 145, Pleasanton 94566 | (925) 249-6555 |
| Lamb Surveying Inc 2178 Rheem Dr # F, Pleasanton 94588 | (925) 462-3512 |
| Meridian Technical Svc Inc 2142 Rheem Dr # B, Pleasanton 94588 | (925) 249-1772 |
| Quiet River Land Svc Inc 5673 W Las Positas Blvd # 215, Pleasanton 94588 | (925) 734-6788 |