update of septic system locate

Discussion in 'Irrigation' started by 1idejim, Aug 27, 2010.

  1. 1idejim

    1idejim LawnSite Fanatic
    Messages: 10,915

    non-metalic pipes and tanks are hard to find unless you can introduce a sonde or fishtape for a locatable signal.

    i had to dowse the pipes for a septic system with a fiberglass tank and no reasonable access.

    i feel pretty good, all pipes and the tank were deep but the locate was pretty much dead on, pretty happy about that too.

    the water service, the tank and the inlet pipe were within five feet of each other making everything a little bit harder to identify. :)




  2. irritation

    irritation LawnSite Gold Member
    Messages: 3,492

    Looks like fun, I wish I had the time to find crap.
  3. bcg

    bcg LawnSite Bronze Member
    from Tx
    Messages: 1,865


    I've got a property that we've been having hellish water issues at. I've shut down zones in the sprinkler system and turned off all the nozzles while zones are runnign to prove that there isn't a leak there but the homeowner is convinced there's a buried sprinkler head or something (there's a LARGE landscaping project going on). House was built in the 50's and there is a good chance that there is an abandoned septic somewhere on the property.

    Anyway, if you dig a hole and walk away from it for a bit, when you come back the bottom of it will have a few inches of water. The "water table" here seems to be about 8 - 10 inches down. Obviously it's killing plants and I'd like to be the hero that finds the source of all this water but the only thing I'm fairly certain of is that the sprinkler system isn't the source. The soil is loam on top (built up beds) with silt underneath. It has essentially no drainage but it's been dry and hot here for several weeks.

    Any suggestions? What would you charge to come find the source for me? That's a serious question, she's got the money and if we could guarantee a resolution, she'd pay your travel and for your time.
  4. 1idejim

    1idejim LawnSite Fanatic
    Messages: 10,915

    you don't need me, but thanks for the offer

    i would be both arrogant and foolish to guarantee positive results on;

    a site unseen

    a groundwater issue

    unexplainable water incursion

    bcg, answer these questions;

    the supply, well or municipal?

    do you have a meter available to check flow with?

    can you install a plumbers loop with a meter in the non-metered pressure lines?

    do you have a master valve for the irrigation?

    a septic system does not produce water, it conveys water.

    you can perform tests as well as i can and for a lot less money.

    if you test the supply for the house, the irrigation system, any out buildings and spigots without results look towards artesian water or incursion from neighbors.

    local well drillers are a good source of information on groundwater levels and artesian sources.

    check your pm later

    thanks again

  5. bcg

    bcg LawnSite Bronze Member
    from Tx
    Messages: 1,865

    Municipal water.

    Meter stops when household and irrigation outlets are off.

    I'm not sure what a plumber's loop is but all city supplies are metered here.

    No master valve.

    We had over 9" of rain in July, is it possible that an old septic could have collected that in reverse through the leach field and is now giving it back?
  6. Sprinkus

    Sprinkus LawnSite Silver Member
    Messages: 2,283

    What area of Texas?
    Is it possible that there's a leak on a nearby property or city mainline that may be causing the issue?
  7. bcg

    bcg LawnSite Bronze Member
    from Tx
    Messages: 1,865

    Houston. Doubtful, it's all over the acre sized property. That would be a heck of a big leak. Everything around it is an acre or more as well.
  8. 1idejim

    1idejim LawnSite Fanatic
    Messages: 10,915

  9. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    You need to verify where the real water table is. You can do that here.


    See attached report for downtown Houston.

    Attached Files:

  10. bcg

    bcg LawnSite Bronze Member
    from Tx
    Messages: 1,865


    That's super helpful. Am I reading this correctly that the average depth to water table is 31cm (or about 12") on the attached? The property in question is in the Nahatchie Loam section.

    Attached Files:

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