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  • Users: ClarkBart
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  1. ClarkBart

    Design Guidelines for Aeration Systems and Blowers

    HI: I have been involved in several aeration system upgrades over the past few years. We always consult manufacturer's of the Diffusers and grids and manufacturer's of the blowers. Together the two parts make up the aeration system for many wastewater treatment processes. The Diffuser Mfg's...
  2. ClarkBart

    10-States Standards and TR-16 Standards applied to HDD

    Hi: I'm just curious to hear from people about their experience with applying 10-States or TR-16 Standards to installation of sewer pipes using HDD(horizontal directional drilling). 10-States requires consistent line and grade between manholes. Most HDD work would have trouble meeting that...
  3. ClarkBart

    Package Water Treatment Plants

    Hi: There have been a lot of manufacturers offering "package" water treatment units. The one that I am most familiar with is Trident. I was wondering if anyone has seen or knows of an operators forum for package plants in general. It seems like sharing experiences could be useful for...
  4. ClarkBart

    Continuing Ed - Refresher courses for Retaining wall design

    Hi: I was wondering if anyone has found a good refresher course for the design of earth retaining structures. The current building codes in our area require engineered design of retaining walls exceeding 3 ft in height. Yeah, I can buy software that does the design, but, I won't do that until...
  5. ClarkBart

    Alarm and Pump Performance Monitors

    Hi: I was wondering what peoples experiences have been with the new class of Alarm and Pump performance monitors. Several manufacturers are making these such as Mission Communications and Raco. I am wondering if the pump performance data such as gpm, starts and run time being provided is...
  6. ClarkBart

    Abbreviations used on Historical Sewer Plans

    Hi: A client of mine obtained a copy of the original sewer plan for his collection facility. It was prepared in 1904. There is a list of data at each sewer main. I am trying to understand what many of them mean. I was wondering if you might be able to help. I attached a shot of a portion...
  7. ClarkBart

    Dry-Stack masonry Walls

    Hi: I am working on a project that involved a significant amount of blasting. The owner wants to use this stone for some retaining walls around the new construction. several of these wall will be over 4' and as much as 8'. The wall will be constructed as a dry laid/stacked stone. The...
  8. ClarkBart

    Catch Basins in HydroCAD

    There is a lot of discussion concerning modeling Catch Basins and their grates on this discussion forum and in the HydroCAD Manual. But, I still have not found a solution/approach to this problem. I am currently trying to model a catch basin/culvert drainage system. I am getting the error...
  9. ClarkBart

    Stormwater Quality Calculations

    I am working with a few clients to develop a Stormwater Retrofit Plan. We are trying to reduce phosphorous being discharged in a TMDL watershed. One of the Retrofits being considered is the repair/rebuilding of roadside swales. The problem is estimating the current phosphorous contribution...
  10. ClarkBart

    Maintenance Fees for Stormwater Facilities

    Hi: As part of the Phase 2 Stormwater programs, the State of New York has a requirement in its model regulation that municipalities take a bond for post construction maintenance of stormwater facilities: basins, pond, underground infiltration, rain gardens etc. Phase 2 is of course a...
  11. ClarkBart

    EPA Effulent Turbidity Limits

    Hi: I was wondering if anyone has been able to decipher just what EPA is trying to propose with its new turbidity effluent limitation for construction sites. It doesn't seem to be a hard proposal for a regulation but more of a request for comment on several proposals. Anyone have any insight...
  12. ClarkBart

    New EPA Turbidity Discharge Limits

    Hi: I was wondering if anyone has been able to decifer just what EPA is trying to propose with its new turbidity effluent limitation for construction sites. It doesn't seem to be a hard proposal for a regulation but more of a request for comment on several proposals. Anyone have any insight...
  13. ClarkBart

    Stormwater Modeling Software Opinions

    Hi: I have a small engineering company and am searching for stormwater modeling software. I've been out of stormwater design for a while and used to use HEC-1, TR-20 and Intelisolve regularly. I am looking for a different solution now. Anybody have any experiences with Carlson or Stormnet...

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