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Bill Brab
Bill Brab

AST Environmental

Bill Brab is a Senior Project Manager at AST Environmental, Inc. with over 17 years of experience in environmental geology and remediation.  He started working for AST in 2011 and has developed AST to become a leading in-situ technology company, providing a unique injection approach involving high resolution sampling, detailed conceptual site models, intricate designs, and injection techniques. Mr. Brab graduated from the University of Kentucky in 2001 with a Bachelor of Science in Geology and holds Professional Geologist licenses in Kentucky, Tennessee, and Alabama.


Distribution of a Carbon Slurry Injectate as Examined by Extensive Soil Cores, Documented by Photographs, and Modeled

Questions exist regarding the distributional characteristics of carbon slurry injectates in the subsurface when installed by high-pressure injection. Limited excavation and sampling studies have been conducted to characterize slurry injectate distribution. To date no studies have comprehensively characterized the distribution of such materials using extensive soil core logging. One month after injections were completed, twelve continuous soil borings were advanced next to existing monitoring wells and 28 additional borings were advanced throughout the treated area. The continuous soil cores were carefully inspected macroscopically and microscopically for the presence of carbon and logged for lithology. Close to 1,000 pictures were taken to document the distribution of injected carbon slurry in various soil types and along bedding interfaces. Samples of suspected carbon in soil cores were analyzed to confirm carbon. Finally, a survey was performed to accurately define locations for all soil borings, monitoring wells and their respective elevations to support modeling.


Small Regional Firm’s Expeditious Approach to No Further Action (NFA) Status on a Portfolio of Former UST Sites

This presentation will highlight the remediation of petroleum-impacted former UST facilities with contamination ranging from widespread LNAPL to low-level dissolved phase groundwater impacts. Emphasis will be placed on efficiency and expedited remediation of sites regulated by the Kentucky UST Branch and Reimbursement Program. It will also highlight innovativeness in rapidly returning a portion of a bankruptcy portfolio of former retail petroleum sites within the Commonwealth to suitable conditions for redevelopment and community revitalization. Expeditious closure involved the injection of a bioenhanced carbon based amendment that eliminates risk and provides long-term treatment for the petroleum hydrocarbons. This approach began in 2008 and was implemented 16 Kentucky petroleum UST facilities. Of these 16 properties, 5 facilities were attributed to the aforementioned bankruptcy portfolio totaling 28 facilities in 4 states including Kentucky. The timeframe for project completion and cost-benefit comparison summary will be discussed in detail to support innovativeness and fiscal responsibility.

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