EnvApps has extensive experience in underground storage tank (UST) assessment, remediation, and closure. We have worked on hundreds of UST projects throughout Southern California, and understand the unique regulatory and economic niche these facilities occupy. Our clients range from major oil companies to independent, family-owned, retail fuel marketing facilities. EnvApps is extremely familiar with the State of California Underground Storage Tank Cleanup Fund (USTCF), and has helped clients recover millions of dollars in already-spent cleanup costs, sometimes extending as far back as the 1980s.

EnvApps has completed hundreds of UST site investigations, the majority at operating stations. We provide fast, cost effective delineation of soil and groundwater impact using the most appropriate subsurface investigative technology, including conventional drilling (hollow stem, air, and mud rotary, limited access, etc.), Hydropunch^®, Geoprobe^®, cone penetrometer, soil vapor surveys, geophysical surveys, etc. We strive to streamline the investigative process, and thereby minimize costs, by collecting only data critical to assess the extent and magnitude of soil and groundwater impact and to evaluate the risk to human health and the environment. EnvApps utilizes risk-based protocols to develop remedial programs appropriate to the risk level in concert with other regulatory requirements.

EnvApps understands the unique needs of the owner and will minimize the disruption that assessment and remediation can cause to the operation of the site. Services include design, permitting, turn-key installation, and O&M of remediation systems including soil vapor extraction, air sparging, dual-phase extraction, excavation, and pump-and-treat. Remedial designs combining multiple technologies are sometimes implemented, in concert with practical regulatory remedial goal negotiation, to obtain site closure.

 

EXAMPLE PROJECTS:

• Managed lot-line to lot-line excavation project with geotechnical, environmental, excavation, shoring, disposal, and health risk assessment subcontractors at a major oil service station in Orange County, California.

 

• Performed Phase I and II assessments on a long-closed former service station. Obtained USTCF reimbursement eligibility for original family owners and then transferred USTCF eligibility to buyer, enabling the property transaction to proceed.

 

• As part of a multi-consultant project team, assessed baseline environmental conditions on dozens of service stations in a very short time as part of the due diligence for a large service station lease agreement between two major oil companies.

 

• Provided full environmental services for approximately thirty-five impacted sites owned by the same retail marketing company. Closure obtained on fifteen of the sites.