Patent ID: 8739867

Claim:
A method for removal of non-aqueous phase liquid (“NAPL”) contaminants from a contaminated volume of the earth, the method comprising the steps of: a. measuring a static NAPL thickness for one or more monitoring wells extending into the contaminated volume; b. calculating a recoverable NAPL value for the contaminated volume by: i. applying a stress and/or pulse to the contaminated volume by operation of one or more subsurface pulsing treatment apparatus; ii. measuring a stressed NAPL thickness in the monitoring wells; and iii. calculating a recoverable NAPL measurement utilizing the difference between the static NAPL thickness and stressed NAPL thickness; c. introducing a fluid into the contaminated volume of earth while the stress and/or pulse is applied to the contaminated volume of earth by the one or more subsurface pulsing treatment apparatus; d. applying a withdrawing force to the contaminated volume and, thereby, removing a portion of the fluid and the NAPL; e. measuring the amount of NAPL removed; and f. assessing the efficacy of removal by comparing the value of recoverable NAPL to the amount of NAPL removed.