Business and Government
Big 3 Automobile Manufacturer Site
hydrologue was retained by a major investment firm for a critical review of site assessment/remedial activities performed by another consultant on one of their properties used by a well-known automobile manufacturer. hydrologue was also retained to provide litigation support services for counsel representing the investment firm. hydrologue concluded that the site assessment was incomplete and inadequate to mitigate environmental impacts from the manufacturing operation. We performed supplementary site assessment activities and advised the property owner's counsel as expert witnesses on environmental issues critical to the case.

Deep Excavation, Removal & Remediation of Jet Fuel-Impacted Soil
Free-phase jet fuel was encountered following removal of three 30,000-gallon Underground Storage Tanks (UST) containing jet fuel and one 10,000-gallon UST containing waste oil at an active aerospace testing and manufacturing facility. Contractual arrangements required that all impacted soil with concentrations above 100-1000 PPM be treated within six months. The method used was excavation and on-site treatment of jet fuel-impacted soil using Low-Temperature Thermal Desorption (LTTD) technology. This method was preferred because of time constraints imposed by a real property transfer contract. Conventional excavation and treatment of jet fuel-impacted soil was initiated and continued to depths of about 40 feet bgs without the use of shoring. Jet fuel-impacted soil was present to the top of the perched water zone at about 78 feet bgs. hydrologue recommended use of slot work; this included backfilling the large excavation site. Work was completed in less than eight months, including substantial delays due to rain and limited work space constraints, area buildings and comprehensive dust suppression activities due to sensitive manufacturing operations.

hydrologue's staff has many years of experience supervising the removal of UST systems in California, Arizona, Oregon, New Jersey, Texas, and Illinois. Our innovative technologies include the construction of multilevel deep gas probe wells, the application of vacuum-enhanced recovery techniques to low permeability formations and thin perched aquifers, air sparging and sophisticated computer modeling, as solutions with regulatory agencies. hydrologue obtained an unprecedented closure for one Superfund site from a state regulatory agency while the client was still in litigation with the U.S. EPA. This allowed the client to complete a real estate transaction in a timely basis.

Numerical Modeling of a Regional Drinking Water Aquifer at a Superfund Site
hydrologue was retained by a Fortune 500 company to simulate the movement of dissolved phase chlorinated hydrocarbons in a Superfund regional drinking water aquifer under the influence of multiple municipal well fields. During a one and a half year-long study, we simulated the transient groundwater flow regime and demonstrated that pumping of municipal well fields creates rapid changes in the direction and transport of contaminants in the aquifer. hydrologue's success followed previous studies' failure to provide the necessary numerical modeling.

Residential
A condominium owner was recently awarded more than $500,000 for repair bills and legal and medical fees as a result of the litigation support services provided by hydrologue. The court ruled that negligence on the part of the homeowner's association resulted in water and mold damage to the resident's unit. hydrologue's consultation and subsequent testimony detailed a failure to install appropriate drainage facilities during the construction period. The court also found that the association engaged in negligence after the resident repeatedly attempted to have the water damage alleviated and remedied.