| Date | Application | Response |
| 2008, January 8 | Three temporary variances for fire protection and pressure safety | Determined that submittal of non-compliance and corrective action plan is appropriate for these conditions. |
| 2008, February 4 | Permanent variance for sprinklers and fire boundary | Variance approved. Includes applicant's commitment to maintain specified conditions and measures. |
| 2008, October 15 | Permanent variance for hoisting and rigging operations in hostile environments | Determined that provisions of DOE-STD-1090-2007 "Hoisting and Rigging" are appropriate for these conditions. |
| 2008 December 30 | Permanent variance for sprinklers and fire boundary | A previously approved variance is approved for a successor contract. |
| 2016, April 28 | Permanent Variance regarding the use of an additional harness with the Mine Safety Appliance PremAireŽ Breathing System at CH2M Hill Plateau Remediation Company. | The variance consist of the use of an additional harness with the Mine Safety Appliance PremAireŽ Breathing System, as well as the specific conditions and commitments to provide safe and healthful working conditions made by CH2M Hill Plateau Remediation Company (CHPRC) at the Hanford Reservation Plutonium Finishing Plant. |
| 2019, August 16 | Permanent variance regarding using California OSHA in lieu of specific provisions of Title 10 CFR Part 851 for Lawrence Berkeley National Laboratory. | The variance consists of Lawrence Berkeley National Laboratory (LBNL) establishing, implementing, and maintaining an effective Injury and Illness Prevention Program (IIPP), as required by 8 CCR, section 3203, using a combination of applicable Cal-OSHA regulations and by incorporating existing contract provisions and certain provisions of 10 CFR Part 851 into the IIPP. |
| 2019, August 16 | Permanent variance regarding using California OSHA in lieu of specific provisions of Title 10 CFR Part 851 for SLAC National Accelerator Laboratory. | The variance consists of SLAC National Accelerator Laboratory (SLAC) establishing, implementing, and maintaining an effective Injury and Illness Prevention Program (IIPP), as required by 8 CCR, section 3203, using a combination of applicable Cal-OSHA regulations and by incorporating existing contract provisions and certain provisions of 10 CFR Part 851 into the IIPP. |
| 2020, June 2 | Permanent Variance regarding using California OSHA Safety and Health Regulations in Lieu of specified provisions in Title 10, Code of Federal Regulations, Part 851. This variance application was submitted in connection with a pilot project launched by the National Nuclear Security Administration's (NNSA) Office of Safety, Infrastructure and Operations (NA-50) and only applies to the construction of the new Emergency Operations Center (EOC) at Lawrence Livermore National Laboratory. | Permanent variance from specified provisions of 10 CFR Part 851, subparts B and C, and Appendix A was approved. Contractors will adhere to title 8, California Code of Regulations (CCR), section 3203 (8 CCR§ 3203), instead of the provisions in subpart B, and will comply with applicable California Occupational Safety and Health Administration (Cal/OSHA) regulations in lieu of the requirements in 10 CFR Part 851, subpart C, and Appendix A. Where there are gaps between the requirements of 10 CFR Part 851 and Cal/OSHA, the contractor(s) will comply with 10 CFR Part 851. |
| 2022, March 18 | Permanent variance from Title 10 CFR Part 851 During Construction of the Long Baseline Neutrino Facility (LBNF)/Deep Underground Neutrino Experiment (DUNE) Project at the Sanford Underground Research Facility. | The approved variance adopts a localized ventilation approach instead of the general dilution ventilation requirement of 30-fpm as prescribed in 29 CFR §1926.800(k)(3). |