Post-rehabilitation flow monitoring and analysis of the sanitary sewer system at Lawrence Livermore National Laboratory

Abstract

Lawrence Livermore National Laboratory (LLNL) is operated by the University of California under contract with the U.S. Department of Energy (DOE). The Livermore site, approximately 50 miles southeast of San Francisco, occupies 819 acres. So far, there have been three phases in an assessment and rehabilitation of the LLNL sanitary sewer system. A 1989 study that used data collected from December 1, 1988, to January 6, 1989, to determine the adequacy of the LLNL sewer system to accommodate present and future peak flows. A Sanitary Sewer Rehabilitation (SSR) project, from October of 1991 to March of 1996, in which the system was assessed and rehabilitated. The third study is the post-rehabilitation assessment study that is reported in this document. In this report, the sanitary sewer system is described, and the goals and results of the 1989 study and the SSR project are summarized. The goals of the post-rehabilitation study are given and the analytical procedures and simulation model are described. Results, conclusions, and recommendations for further work or study are given. Field operations are summarized in Appendix A. References are provided in Appendix B.