Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Related Articles


Best Bed for this situation...Perimeter Trench?

Best Bed for this situation...Perimeter Trench?

Best Bed for this situation...Perimeter Trench?

Hello All,

I have done a few simple septic designs in the past, but I don't have a vast deal of experience. I have done about 20 or so, but just by coincidence have been very straight forward.

I am helping a friend with his septic design for ne house and I am working with a lot that had been filled with sand before it was sold. Sounds good, but the problem is that there is water traveling across the native (original elevation) soil which appears to be a 4-6" layer of organics, then sandy below (with a small vein of clay, but mostly sand).

Can't get a good perc. because of the water running across the native level and coming into the hole. (Side Note, there is a clogged driveway culvert that is trapping water as well) I was thinking about reinstalling a proper culvert under the driveway, and installing a perimeter drain around the bed to stop the water from entering the trenches.


Thanks all.

RE: Best Bed for this situation...Perimeter Trench?

Don't put the drain down-gradient of the septic field or it will be taking on effluent from the field. Above gradient it is a good idea, and I would go one step further and line the down-side of the interceptor (side of the interceptor trench closer to the field) with a 6mil poly barrier. Make sure you backfill the interceptor with a free-draining material. Make sure to locate the discharge of the interceptor a good distance away from the field.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close