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NaicsCode: 541360 - Geophysical Surveying and Mapping Services
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| Business | Contact | City | State |
|---|---|---|---|
| Kaskaskia Engineering Group, LLC | Geri E. Boyer | Belleville | IL |
| Lin Engineering, Ltd. | Fred Lin | Westmont | IL |
| LT Leon Associates, Inc. | Luis Leon | Des Moines | IA |