View the step-by-step solution to:

Question

This question was created from xx16.pdf https://www.coursehero.com/file/27516832/xx16pdf/

27516832-383845.jpeg
27516832-383845.jpeg

Question 4 (10 marks) A large volume of T richloroethene (TCB) has been released into the subsurface. The TCE
has penetrated the water table and is moving vertically downwards through a sandy
aquifer before accumulating on top of a layer of silt. The sand has a porosity of 0.33, an organic carbon content of 1.5 %, and a dry unit density of 2.5 g/cm3.
The sand and the silt layer have the following Brooks-Corey parameters sand: 9. = 2.8 it: 1. = 2.5
Pa = 3000 Pa Pd = 3500 Pa
S,=0.15 S,=0.10 TCE has the following properties
density: 14?O g/l
solubility: 1100 mg/l
K0c = 126 ml/g In answering the questions below, clearly state all assumptions made: a) What head of TCE must accumulate above the silt layer before penetration of this layer
occurs? b) What is the total mass of TCE in a one litre volume of the sand layer immediately
above the silt layer, at the time of penetration? What is the proportion of this mass in the
aqueous, non-aqueous and soil phases?

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Let our 24/7 Civil Engineering tutors help you get unstuck! Ask your first question.
A+ icon
Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors