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Recent content by waterwellguy

  1. waterwellguy

    hydropneumatic surge tank

    I am not familiar with surge tank design and need one to protect a deep injection well. Static pressure is 20 psi, operating pressure is 40 psi. I need to protect from water hammer and fluid column seperation. I am told that I need to install a check valve between the surge tank and well, but...
  2. waterwellguy

    1,2-Dichloropropane removal

    Will an air-stripper remove 1,2-Dichloropropane from raw water? I have a well that recently tested 9 ug/L for the stuff. The well produces about 200 gpm. Any idea what an air-stripper costs?
  3. waterwellguy

    Large diameter FRP casing

    I am looking for 24-inch diameter FRP casing for installation in a well. Having trouble finding a manufacturer that will produce 24-inch diameter FRP casing with a threaded connection. Casing will be set to 2,800 feet and must undergo pressure testing every 5 years. Anyone know of a...
  4. waterwellguy

    Large diameter FRP pipe

    I would like to use FRP for the final casing of a well I am designing. I am having trouble locating an FRP manufacturer that makes 24-inch diameter FRP that has a threaded connection. The casing will be set to a depth of approximately 2,800 feet and must undergo pressure testing every 5 years...
  5. waterwellguy

    Pipeline - cathodic protection

    Will cathodic protection protect both the inside and outside of a mild steel pipeline? If not, can you provide a basic explanation about why not?
  6. waterwellguy

    PVC Casing - large diameter/deep applications

    I am looking for materials for a well that will be 24 inches in diameter and about 2800 feet deep. Is fuse welded PVC a reasonable option? Concerns with PVC are cementing issues (low collapse strength), ability to pass pressure test of 150 psi every 5 years, and longevity of the material in...
  7. waterwellguy

    Cathodic protection for deep well

    I am designing a deep injection well and would like to provide cathodic protection to protect against casing corrosion. The well will have casing to 2,750 feet. I will be using seamless, half-inch wall, mild steel casing. Any real challenges to protecting the entire casing string? More...
  8. waterwellguy

    Help with well casing corrosion/buildup

    Scale buildup is underwater. I have not attempted to dissolve the material in acid. The scale seems to bond to the well casing pretty well, does not come off real easily.
  9. waterwellguy

    Help with well casing corrosion/buildup

    Just injecting secondary treated wastewater, so metals levels are low. Zinc - 0.085 mg/L, copper - 0.005 mg/L, lead - 0.001 mg/L, nickel - 0.007 mg/L, molybdenum - unknown, pH is 7.3, chloride - 1200 mg/L, chemical oxygen demand - 26.4 mg/L, sulfate - 262 mg/L. I do not have information...
  10. waterwellguy

    Help with well casing corrosion/buildup

    I have had a sample of hte buildup material from the injection well analyzed. It is high in zinc, copper, lead, mickel, molybdomen, and arsenic. I suspect this is a scaling problem. Any idea how to prevent further buildup?
  11. waterwellguy

    Help with well casing corrosion/buildup

    Temperature at the wellhead ranges from 35 to 95 degrees, probably averages 80 degrees. The well is artesian and probably has about 5 psi of pressure on it. Yes, remediation will probably run me $30,000 - not cheap. Here is another one. I have a well that is used for disposal of secondary...
  12. waterwellguy

    Help with well casing corrosion/buildup

    I have a monitoring well the is 6" in diameter and 2000' deep. It produces water similar to seawater, except high SO4. A black, hard, sulfurry-smelling material has built up on the inside of the casing and choked off flow from the well. The well typically sits idle - pumped about one day a...
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