LNAPL Remediation

Langan developed a broad-scale management program to address light non-aqueous phase liquid (LNAPL) over a 70-acre area at a major asphalt refinery. The program was based on developing an LNAPL conceptual site model and evaluating applicable remedial technologies. Langan conducted LNAPL recoverability testing and pilot-scale testing to quantify recoverability and define remedial design parameters. Langan developed a focused LNAPL remediation approach for the entire site and proposed a suite of technologies from less aggressive (LNAPL skimming and periodic vacuum truck extraction) to more aggressive (multi-phase extraction) to allow for a phased and streamlined, yet flexible, program.