Unless this section is preempted by applicable federal statutes, the department may require that in residential zones or areas, all providers of personal wireless services, as defined in *section 1 of this act, provide random test results on power density analysis for the provider's licensed frequencies showing radio frequency levels before and after development of the personal wireless service antenna facilities, following national standards or protocols of the federal communications commission or other federal agencies. This section shall not apply to microcells as defined in RCW
80.36.375. The department may adopt rules to implement this section.