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26900 Bear Valley Road, Tehachapi.
Posted October 16, 2014
E2C Remediation Clean-Up
Three gasoline Underground Storage Tanks (one waste oil Underground Storage Tank, two multi-product dispensers, and the corresponding piping) were removed from an operating gas station in Tehachapi in August of 1998. As a result of testing during the removals, fuel hydrocarbons were discovered in high concentrations in the surrounding groundwater, shortly thereafter, 19 groundwater monitoring wells were installed at the site.
E2C Remediation was hired in 2001 to take over the environmental remediation project, and in January of 2003, both on-site and off-site remediation system elements were installed. E2C also operated a Vapor Extraction/Groundwater Air Sparging System, and between January 2003 and August 2005, over 86,000 pounds of fuel hydrocarbons were removed from the site.
Come 2005, high-vacuum extraction (HVE) had begun to assist with E2C’s remediation efforts, and between July 2008 and June 2011, HVE with hydrogen peroxide injections was conducted in limited hot wells. During the end of 2011, remediation was discontinued and post-remediation groundwater monitoring began.
In response to E2C’s Groundwater Monitoring Report during October of 2012, the Water Board outlined the actions required for final consideration of closing the site under the Low-Threat Closure Policy.
After completing all of the necessary actions in April of 2013, E2C submitted its Human Health Risk Assessment, Soil Gas Survey, and Conceptual Site Model Report. On July 17, 2013, the Water Board agreed with E2C’s request for closure, and requested the destruction of the wells. On February 17, 2014, E2C received the Case Closure Letter from the Water Board.