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Thread: pump for monitoring wells

  1. #1

    pump for monitoring wells

    I've been purging monitoring wells and I'd like to buy a small, portable pump to make my life easier. Does anyone have any ideas of what's available to me? The pump needs to be able to connect to the 1/2" tubing inside the well and have a spigot or something similar because I need to pour samples into bottles.

    Thanks.

  2. #2
    Pump guy speedbump's Avatar
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    What is the deepest level you will be lifting from and what is the casing diameter?

    bob...

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  3. #3
    The deepest well is about 30 m, but most are in the range of 10-20m deep. I think the casings are all 1.5" in diameter.

  4. #4
    How have you currently been purging these wells?

    10 meters is beyond any surface pump.

    Rancher

  5. #5
    We've been purging them by hand, by pulling the tubing out and pumping it. It's rather labour intensive and annoying.

    Are there any portable pumps that will reach beyond 10 m?

  6. #6
    Pump guy speedbump's Avatar
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    The only way I can think of is a pipe small enough to fit down the 1.5" pipe that has a plunger in the bottom with a check valve below it that you can work the pipe up and down to pump the well out. The plunger being down near the bottom will then be pushing the water up as opposed to trying to pull it up, which is physically impossible beyond 25'.

    bob...

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  7. #7
    Senior Member
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    Don't know the OD but, am sure it will fit in 2" casing. See this link;

    http://www.envirotechonline.com/prod...p?prod=ES%2D90

    Cycle Stop Valve Website

  8. #8
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    You could use an air compressor with a small J Tube fitting. What you would have is a a tube that goes down the well with a fitting on the end of it in shape of a U. It will look like a long upside down candy cane. When you force air down the tube it will lift the colum of water in the well to the surface. On the top of the well you would have an elbow with a hole drilled in the top that the tube will fit through. The water coming up the well will be directed out of the discharge of the elbow where you can take your samples. You can put a valve on the tube coming out of the compressor to regulate the air flow which will in turn regulate the flow of water coming out of the well. I have used this in the past on a bigger scale to develope screened wells. I just dont know if the water being airated will screw up your samples or not.Also you would have to find small enough fittings to fit down the 1 1/4" wells,2" and larger would not be a problem. I use to core bedrock,take spoon samples, and install monitoring wells so i have have helped engineers purge wells with the method you were describing and it does suck big time.

  9. #9
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    Hi Sammy. I have also blown a lot of wells just the way you describe. Don't know if the air would mess up a sample on a monitor well either. I would bet you need to use and oil less air compressor though.

    Cycle Stop Valve Website

  10. #10
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    Valveman how are things for you? I haven't been posting for a while because i have been so busy. I'm thinking that by oxidizing the water it would screw with the chemistry of the sample. I know when taking VOC samples you have to make sure the bottles are filled to the very top so no vapors collect. Maybe by oxidizing the water the the contamination is being removed at the same time.

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