| Company | Location | Certifications | License # |
|---|---|---|---|
| Aran Thiessen | — | Installer (Class II)Designer (Site Evaluator) | OS0035837 |
| Benjamin Redekopp | — | Installer (Class II)Designer (Site Evaluator) | OS0034296 |
| David Bartsch | — | Installer (Class II) | OS0038592 |
| David R Froese | — | Installer (Class I) | OS0033863 |
| Eduardo Villalobos Garcia | — | Installer (Class I) | OS0040486 |
| Frank Krahn | — | Installer (Class I) | OS0040620 |
| Frank Redekopp | — | Installer (Class II)Designer (Site Evaluator) | OS0030876 |
| Franz F Bergen | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0035697 |
| Gabriel O Sr Baeza | — | Installer (Class II) | OS0037468 |
| George Wiebe | — | Installer (Class II) | OS0040232 |
| Jeff R Rose | — | Installer (Class II)Designer (Site Evaluator) | OS0027464 |
| Maria W Peters | — | Installer (Class II)Designer (Site Evaluator) | OS0029994 |
| Peter Enns Thiessen | — | Installer (Class I) | OS0040426 |
| Ryan D Richards | — | Installer (Class II)Designer (Site Evaluator) | OS0030554 |
14 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Gaines County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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