Underground Storage Tanks
One of the most common sources of chemical contamination is a leaking underground or above-ground petroleum storage tank (UST or AST). Many states have funds specifically appropriated for the assessment and remediation of sites affected by old or failing tanks.
UST removal and remediation
Remediation of impacted sites most likely will involve removal of the storage tank; if the tank is buried, excavation is required. Soil samples are collected before, during, and after excavation and remediation and typically submitted to the lab for evaluation.
Because most excavated tanks were used for Number 2 Heating Oil, typical UST projects involve analysis for Diesel Range and Gasoline Range Organics (TPH-DRO / GRO).
Samples should be collected in specialized Encore or Terracore kits, which must be obtained from the laboratory. Alternatively, samples may be submitted in glass jars with Teflon-lined caps.