Ozone Sparge Remediation – Limestone County - Case Study
Newterra Technology has been selected to develop a remediation plan for soil and groundwater contaminated with petroleum hydrocarbons and BTEX
Two diesel and one gasoline tanks were removed from the Lowe Farm site in Limestone County, Alabama, raising concerns about petroleum hydrocarbon and BTEX contamination. Newterra’s ozone injection remediation plan successfully reduced BTEX levels.
Newterra was selected as the remediation technology for this site. After initial site condition research was conducted and a system sizing questionnaire was filled out, Newterra recommended the use of an OSU20-52 cabinet with 10 insitu oxidation points, each estimated at achieving a 10 foot radius of influence. The site layout shows the locations of each of the sparge wells.
Sparging began in December of 2006. Results from monitoring indicated that BTEX levels dramatically decreased from the time that the system was installed. Results from monitoring well 8 are graphed showing the fluctuating background concentrations pre ozone and the decreasing trends from throughout the injection period. The site closed in 2008.
Existing Conditions: Primary contaminants of concern are petroleum hydrocarbon and BTEX residual in both the soil and groundwater.
The Newterra Solution: Newterra was contracted to build a system capable of injecting concentrated ozone gas focussed on treating BTEX and Benzene in tight clay soils. Newterra recommended the use of an 10 pound per day ozone cabinet equiped with Intelo-zone. The system utilized 10 in-situ oxidation points, each estimated at achieving a 10 foot radius of influence.
The site was closed in a year and a half after mobiliziation