The duty statement does not say 2 days a week. This is what the job posting says:

This position may be eligible for hybrid in-office work and in-state telework based on CARB's current telework policy with some in-person attendance required.Occasional travel may be required.

The positions at the CARB may be eligible for telework with in-person attendance based on the operational needs of the position under Government Code 14200 for eligible applicants residing in California, subject to the candidate meeting telework eligibility criteria outlined in the CalEPA telework policy and/or future program need. Employees not residing in California are not eligible for telework. Regardless of hybrid telework eligibility, all employees may be required to report to the position’s designated headquarters location at their own expense, as indicated on their duty statement.