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Recent content by amurphy

  1. amurphy

    history of water treatment

    Although this doesn't concentrate on North America, I thought this website on water history was interesting: http://www.waterhistory.org/
  2. amurphy

    rock blasting resources

    I am designing a water distribution pipeline in an area where bedrock is very shallow and will require blasting for installation of the pipeline below frostline (approx 4 feet below grade). Hardness of the rock has not been determined yet. Neighboring residents have complained of problems with...

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