SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT

File: 011696_129_15_028.txt
Page: 028
Total Pages: 71






                  wells should only be accomnlished immedia@ ..prior to
                  -becrinnincr work on the pump motors and electrical components
                  that were submerged. -Less corrosion will take place if the
                  components are not exposed to air.           Also, there is a
                  possibility that some of the 13umo motors could be rei5aired for
                  the short term rather that replaced.            This should be
                  investigated 'because 'of the long lead. times for motor
                  replacements.
                       During the data collecting phase of our investigation, it
                  was noted that several of the secondary pump stations were
                  -off-line due to electrical power outages. If 13ower can not be
                  brguctht back mp, then auxiliary generator sets need to be
                  brought in and connected for emergency operation. otherwise
                  backup will occur at those points.        OMI is aware of the
                  situation.


                       S. Collection System    Odor Problems.     It should     be
                  noted that odor problems at the pump stations existed prior to
                  -the war and will continue to be a problem.            The high
                  temperatures of the wastewater and the long residence time
                  within the conveyance system leads to anaerobic conditions
                  which in turn enhances the production of hydrogen sulfide. the
                  odor producing compound. The long residence time within the
                  system -is inherent to a long, flat, system with multiple
                  pumping points, and will be aggravated by the low flows
                  generated by the-reduced population. .

                       The odor at the beach areas caused by the pump station
                  by-passes will be eliminated by the repair of the major pump
                  stations.

                      once the main pump stations are on line,, work should
                  begin on the existing odor control stations and repaired'in
                  order of priority based on population centers.        Lonct lead
                  times' for supplies needed to operate the odor control
                  Processes mail occur.    The city should anticipate this and
                  order needed materials and supplies now.

                       odor problems existed within the collection system prior
                  to the war; not only at the pump stations, but odors were
                  evident along various gravity pipelines, as well. It is n     'ot
                  reasonable to expect that the pre-existing odor situation can
                  be improved at this time or in the near future. The Black and
                  Veatch Master Planning Report prepared in 1989 gives an
                  excellent discussion of the problems, recommended solutions
                  and investment projections for addressing this long term
                  problem.   In the short term, the realistic goal must be
                  .returning to pre-invasion conditions, not to correct pre-
                  invasion problems.


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Box ID = BX000000
Unit = CONST ENG LABS  
Parent Organization = CORPS OF ENGS   
Folder Title = SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT                                                      
Subject = SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT
Document Number =        129
Image file name = 00000029.tif