The General Authorized Access (GAA) users operate at the lowest priority in the Citizens Broadband Radio Service (CBRS) band. So, they must not cause harmful interference to the higher priority users and must cooperate with each other to minimize mutual interference and increase spectrum utilization. Towards this goal, the Wireless Innovation Forum (WInnForum), a standards body, has recommended three schemes. We study performance of one of the schemes, called Approach 3. To the best of our knowledge, there is no performance study available for Approach 3. WInnForum does not specify any performance metrics to evaluate the schemes. We define few performance metrics for Approach 3 that will be useful for the operators in deciding their operating parameters. We choose two actual locations and use real terrain and land cover data of continental USA in our simulation study. Hence, we expect our results to be similar to practical implementations.