A subsurface vadose zone is observed to be contaminated with benzene. The samples taken from the contaminated sites exhibit a total benzene contamination of 500 mg/kg soil. Soil bulk density is 1.8 g soil per cm3. The total porosity is 0.45 cm3/ cm3 and the volumetric water content is 0.15 cm3/cm3. The foc is 0.02. Assume that the subsurface temperature is 25 oEstimate percent mass distribution of benzene in each phaseEstimate the concentration of benzene in each phase in terms of mg/m3.Determine if there is any NAPL. Note that the maximum solubility limit of benzene in water is 1780 mg/L.The design engineer is planning to use an SVE system to remediate the site. The contaminated vadose zone has a total soil volume of 250 000 m3. The engineer wants to use 20 extraction wells each with an airflow rate of 120 Lpm. Based on design parameters, how long will it take to achieve 90 %mass removal from this site?

1. Estimate percent mass distribution of benzene in each phase The percent mass distribution of…

Answered: A subsurface vadose zone is observed to…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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A subsurface vadose zone is observed to be contaminated with benzene. The samples taken from the contaminated sites exhibit a total benzene contamination of 500 mg/kg soil. Soil bulk density is 1.8 g soil per cm³. The total porosity is 0.45 cm³/ cm³and the volumetric water content is 0.15 cm³/cm³. The f_oc is 0.02. Assume that the subsurface temperature is 25 ^o

Estimate percent mass distribution of benzene in each phase
Estimate the concentration of benzene in each phase in terms of mg/m³.
Determine if there is any NAPL. Note that the maximum solubility limit of benzene in water is 1780 mg/L.
The design engineer is planning to use an SVE system to remediate the site. The contaminated vadose zone has a total soil volume of 250 000 m³. The engineer wants to use 20 extraction wells each with an airflow rate of 120 Lpm. Based on design parameters, how long will it take to achieve 90 %mass removal from this site?

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