env-consulting

PROJECT SPOTLIGHT

Progressive Property Remediation

An ongoing tetrachlorethylene leak was identified at an industrial property in the midwestern United States. As a responsible corporate citizen, this Atwell client decided to proactively remediate the site with our help.

Atwell conducted contamination measurements and mapping activities, which identified an underground lagoon and storage bins as the pollution source. Atwell implemented state-of-the-art technology, including a zero-valence iron and a KMnO4 permeable reactive barrier, to contain the contamination plume from impacting a nearby river. Instead of installing well pumps or other traditional remediation mechanisms that are visible and require long-term maintenance, Atwell installed a 300-foot-long subsurface Permeable Reactive Barrier (PRB). Filled with a mix of zero-valence iron and sand, the 25-foot-deep trench naturally stabilizes the polluted groundwater before reaching the river.


Revitalizing through Retail

Spanning 20 acres and assembled from 104 parcels, creative redevelopment solutions enabled the transformation of an environmentally impacted area into one of Greater Cleveland’s largest retail developments.

As the primary project consultant, Atwell provided Phase I and Phase II Environmental Site Assessments, a ground-penetrating radar survey, asbestos surveys of 104 buildings, and assessment of the impact of 14 historical oil and gas wells on the proposed project site.

Atwell also provided zoning/entitlement support, site design, civil engineering, contractor oversight and surveying components for the development, which includes a 123,800-square-foot Target store, 87,100-square-foot Giant Eagle, 5,000-square-foot Get-Go gasoline/convenience store, and 3,800-square-foot Key Bank.


Former Fueling Facility Remediation Support

A major municipal aviation department set out to remediate a former airport fueling facility. Atwell’s designers and staff oversaw the design, operation and performance of the full-scale soil and groundwater remedial system. Used to remediate a Jet A release of approximately 750,000 gallons under an approved Revised Corrective Action Plan, the system development includes groundwater, soil and vapor sampling and analysis; subsurface methane monitoring; regulatory compliance; remediation system monitoring; and operation and maintenance of three biosparge, three vapor extraction and three catalytic oxidation systems. The project also includes more than 100 remediation, air sparge, soil vapor extraction and air injection wells.