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  1. FWilson

    Temperature drop from a cascade aeration process

    I need to calculate the temperature drop in water which starts at one pond at 160 deg F and falls over cascade aeration into a lower pond.. The drop is 8 steps, each 0.8' drop and 2.6' in horizontal length. I know the air temperature and will assume clean water. I need to determine the...
  2. FWilson

    Fabric Building Design

    I am looking for some continuing education in the design of fabric structures, just basics to allow me to understand what vendors are telling me. Any ideas, any location? I am not finding anything.
  3. FWilson

    Cost of a Bolted steel tank

    I need a budget cost for a 20,000 gallon, vertical bolted steel tank. Mild steel, will have a liner inserted separtely, used to hold water, Closed top. Material and installation. Anyone further have an idea on removal of same?
  4. FWilson

    Lagoon Liner Damage, probably Turtles

    It is very rare that animals consider plastics/rubbers a food source. We have seen instances where animals would burrow through a liner to get to something on the other side. Are the turtles trying to go up the slope? Is it very steep? If the fold or ripple are seems to be the concern, if...
  5. FWilson

    ISO Std 175

    ISO Std 175 concerns the testing of materials' compatibility with various chemicals and reagents. Does anyone know the length of exposure time specified in this standard?
  6. FWilson

    Lagoon Liner Damage, probably Turtles

    What is the liner type?
  7. FWilson

    Pond Liners above permanent pool

    Do you plan to install the liner throughout the impoundment, i.e. bottom and sidewalls? Do you mean where should it be terminated on the slope?
  8. FWilson

    Pond Liners

    The best and most reliable way is to make the connection above the water level, using a batten strip if you have a rigid perimeter wall. The following site shows a typical batten detail: http://www.xr-5.com/tech-library/dwgs_xr-5.html
  9. FWilson

    Soil temperature below a tank.

    Thanks everyone, this information allows me to estimate as I needed to do.
  10. FWilson

    Soil temperature below a tank.

    I need to predict the temperature of soil 24" below a constant 185 deg F. tank bottom. I can estimate soil type and water content. Any ideas on how to approximate the temperature?

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