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  1. swmguy

    Sand filter sand

    That jives with my thinking. I'm gonna pull that narrow ratio out of our design manual. Reminds me of the days when I'd get a set of approved plans specifying a geotextile with properties that no existing product met. Too much "unobtanium". Now that I'm in a position to make these changes...
  2. swmguy

    Erosion Control Certification for Contractors

    Here in MD we have an online course to get folks "certified". Basically, we need someone onsite who has been trained and certified to implement any repairs or issues an inspector might find during an inspection. http://mderpc.mde.state.md.us/Account/login.aspx
  3. swmguy

    Sand filter sand

    Just curious what the stormwater design/maintenance community has to say about the Austin sand filter design spec for media- they call for C33 sand, but limit the grain size range to .02"-.04". I've been in the construction materials business for over 20 years, and in stormwater design and...
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