人员的专业培训对于确保有效的交叉连接控制计划得以实施至关重要。作者赞同这一需要，并强调了对参与深度交叉连接控制程序启动和维护的人员进行专门回流培训的价值。

Specialized training of personnel is critical to ensure than an effective cross-connection control program is carried out. The author endorses the need, and stresses the value of specialized backflow training for personnel involved in the inauguration and maintenance of in-depth cross-connection control programs.