Cal. Pub. Resources Code § 3223
The district deputy or an inspector designated by the supervisor may be present at the test for shutoff. If the test is personally witnessed by the district deputy or an inspector at the site of the well, such district deputy or inspector shall make a report in writing of the result to the supervisor. A duplicate of the report shall be delivered to the owner.
If any test is unsatisfactory to the supervisor, he shall so notify the owner or operator and shall within five days after the completion of the test, order any additional work and tests necessary to properly shut off the well. In the order the supervisor shall designate a day upon which the owner or operator shall again test for shutoff, which day may, upon the application of the owner or operator, be changed from time to time at the discretion of the district deputy.
Ca. Pub. Res. Code § 3223