| OpFlexes approval letter for recycler & machine 5. | Letter | MAR-14-2014 |
| OpFlexes for recycler & machine 5 support docs | Rationale | MAR-14-2014 |
| 2013 CM report acknowledgement letter | Letter | FEB-24-2014 |
| OpFlex notification for 801 monolithic carrier process | Letter | FEB-04-2014 |
| Op Flex request to add recycle machine. | Letter | JAN-23-2014 |
| Opflex request to install new end line A/F Sensor | Letter | JAN-02-2014 |
| Approved insignificant unit request for GDI-3 fabrication process. | Letter | AUG-12-2013 |
| GDI-3 Fabrication Process Insig Activity Determination Letter | Letter | AUG-12-2013 |
| DDI-3 Fabrication Process-Insig Activity Request | Letter | JUL-24-2013 |
| OpFlex Request and APC Response for injector calibration exhaust emissions to RTO | Letter | JUN-27-2013 |
| 2012 CM report acknowledgement letter | Letter | APR-05-2013 |
| Resp. Official name change. | Letter | JAN-02-2013 |
| Op Flex approval letter to add "Stamping" machine. | Letter | MAY-06-2011 |
| Source38-Letter addressing loss of VOC emissions with thermal Oxidizers shutting down due to loss of power | Letter | DEC-15-2008 |
| Insig Activity-Letter | Letter | AUG-19-2008 |