900.12(e)(3)(i),(ii): Quarterly quality control tests. Facilities with screen-film systems shall perform the following quality control tests at least quarterly:
(i) Fixer retention in film. The residual fixer shall be no more than 5 micrograms per square cm.
(ii) Repeat analysis. If the total repeat or reject rate changes from the previously determined rate by more than 2.0 percent of the total films included in the analysis, the reason(s) for the change shall be determined. Any corrective actions shall be recorded and the results of these corrective actions shall be assessed.
- How many films (and what type) must be included in the repeat analysis test each quarter?
- How long must we maintain the actual films from the repeat analysis?