California Regional Water Quality Control Board, Los Angeles Region, GeoTracker Website, 2018

The 122-acre former Athens Tank Farm located in Willowbrook was a petroleum products storage and distribution facility owned and operated by Exxon Mobil Oil Corporation from the 1920s to mid 1960s. The site now is occupied primarily by a regional park, apartment buildings, and some modular buildings. A Phase I soil vapor extraction (SVE) system with a thermal oxidizer (Thermox) rated to extract and treat up to 500 SCFM of soil vapor has operated at the site since 2014. The progress report for the first quarter of 2018 relates the total estimated mass of VOCs removed to date as 385,334 lb and the total estimated mass of methane removed to date as 54,447 lb. The Phase II horizontal remediation well (HRW) SVE system was installed in 2017. Phase II system shakedown and startup activities are ongoing due to system adjustments and component replacements, and the system is expected to be operational during the second quarter of 2018. System startup and performance monitoring of Phase III air/biosparge activities is to follow completion of the HRW shakedown. Baseline sampling of sparge wells, SVE wells, observation wells, and a background well for natural attenuation indicators, including nutrients, geochemical parameters and COCs, has been completed. http://geotracker.waterboards.ca.gov/profile_report?global_id=SLT4L3741812