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Thread: irrigating with water collecting behind retaining wall

  1. #1
    DIY Junior Member sse's Avatar
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    Default irrigating with water collecting behind retaining wall

    I have a 40 foot retaining wall behind which the grass is almost always soaked. Turns out there is ALOT of water there. I dug a hole about a foot deep 2 weeks ago, and it's still full of water.

    I have decided to pump this water into a tank (slowly overnight using a short well point and pump) then use the water in the tank for irrigation. I do have a septic system, but it about 80 feet away.

    Do I need to be concerned about bacteria or phosphates or anything else for that matter if I am just irrigating? Are there other things I should test the water for to be sure it is safe.

    I am not worried about irrigating the lawn, but I am concerned about irrigating my vegetable garden with this water.

    Thank you!

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
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    Drive the point at an angle almost horizontal into the bank. The pressure there should be enough so that sewage from your septic field would not migrate there.

  3. #3
    DIY Junior Member sse's Avatar
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    Thanks for the reply. From what I have seen, just digging 1 foot down, it looks like the retaining wall is holding back quite a bit of water.

    Not sure angling the well point would change the source of the water that much, since I wasn't going very deep in the first place.

    Either way, I really want to test the water still to make sure it safe to irrigate a vegetable garden. Do you know what I should test for, and if those diy test kits are any good?

    Thanks again.

  4. #4
    Porky Cutter,MGWC Porky's Avatar
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    Test it for Coliform Bacteria. There are test kits for that.
    Porky Cutter, MGWC
    (Master Ground Water Consultant)

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