| 2019-11-13 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-11-13 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Pass | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Pass | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Fail | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Pass | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Fail | State |
| 2019-09-24 | MASSILLON ASPHALT COMPANY | Pass | State |
| 2019-09-13 | REPUBLIC STEEL | Pass | State |
| 2019-09-13 | REPUBLIC STEEL | Pass | State |
| 2019-09-13 | REPUBLIC STEEL | Pass | State |
| 2019-09-13 | REPUBLIC STEEL | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-28 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-01 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-01 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-01 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-08-01 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-07-31 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-07-30 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-07-30 | HEIDELBERG MATERIALS US CEMENT LLC | Pass | State |
| 2019-07-30 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-07-16 | ENBRIDGE GAS OHIO - ROBINSON STATION | Pass | State |
| 2019-07-16 | ENBRIDGE GAS OHIO - ROBINSON STATION | Pass | State |
| 2019-06-18 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-06-18 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-06-18 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-06-13 | REPUBLIC STEEL | Pass | State |
| 2019-06-13 | REPUBLIC STEEL | Pass | State |
| 2019-06-13 | REPUBLIC STEEL | Pass | State |
| 2019-05-21 | REPUBLIC STEEL | Pass | State |
| 2019-05-21 | REPUBLIC STEEL | Fail | State |
| 2019-05-21 | REPUBLIC STEEL | Pass | State |
| 2019-05-21 | REPUBLIC STEEL | Fail | State |
| 2019-05-16 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-15 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-14 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-05-02 | MPLX TERMINALS LLC - CANTON TERMINAL | Pass | State |
| 2019-02-19 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-02-18 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | Pass | State |
| 2019-01-15 | MATALCO | Pass | State |
| 2019-01-15 | MATALCO | Pass | State |
| 2019-01-15 | REPUBLIC STEEL | Pass | State |