Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Randall County | 2 | 45 |
| Reagan County | 1 | 5 |
| Real County | 1 | 3 |
| Red River County | 5 | 23 |
| Refugio County | 1 | 4 |
| Roberts County | 8 | 55 |
| Robertson County | 2 | 3 |
| Rockwall County | 1 | 2 |
| Runnels County | 3 | 25 |
| Rusk County | 17 | 124 |
| Sabine County | 2 | 2 |
| San Augustine County | 3 | 4 |
| San Patricio County | 12 | 52 |
| San Saba County | 3 | 12 |
| Smith County | 17 | 94 |
| Somervell County | 2 | 4 |
| Starr County | 3 | 12 |
| Sterling County | 1 | 1 |
| Sutton County | 2 | 6 |
| Swisher County | 1 | 5 |
| Tarrant County | 3 | 29 |
| Terrell County | 9 | 27 |
| Titus County | 21 | 208 |
| Tom Green County | 4 | 25 |
| Travis County | 17 | 199 |
Sites
| Site Identifier | Name | Location | Samples |
|---|---|---|---|
| 41SY41 | Robert Griffin | TX | 1 |
| 41SY45 | Buddy Hancock | TX | 1 |
| 41SY92 | Tyson | TX | 4 |