| Company | Location | Certifications | License # |
|---|---|---|---|
| Brian G Williams | — | Inspector (Maintenance Provider) | MP0002163 |
| Carlos Garces | — | Installer (Class I) | OS0039091 |
| David Jr Lopez | — | Installer (Class II) | OS0007145 |
| James E Leger | — | Installer (Class II) | OS0029827 |
| Javier Alberto Ramirez | — | Designer (Site Evaluator) | OS0035441 |
| Jose M Jr Sandoval | — | Installer (Class I)Inspector (Maintenance Provider) | OS0028511 |
| Matt Allen Ivy | — | Installer (Class I) | OS0030431 |
| Rolando Sanchez | — | Installer (Class II) | OS0039595 |
| Rosalinda Pardo | — | Designer (Site Evaluator) | OS0037084 |
| Trevor Allen Simonsen | — | Installer (Class I) | OS0040444 |
| William D Kemp | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0004793 |
11 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in San Patricio County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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