The Request sought various records concerning a District construction project. The District provided responsive records on appeal. The DEP joined the appeal as a direct interest participant. The District demonstrated that an email chain is exempt under Section 708(b)(10). The District demonstrated that certain records do not exist in the District's possession, custody or control. The District did not demonstrate that it did not have any additional emails or attachments in its possession, custody or control. The District is not required to provide responsive records in a certain format. Granted in part, denied in part, and dismissed as moot in part.