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Webinar: US 67 Groundwater Contamination Project – Dallas District
November 29 @ 12:00 PM - 1:00 PM CST
During US Highway 67 improvements south of Dallas, the roadway construction contractor noticed liquid seepage from the excavated embankment face and reported the seepage was staining the face of the limestone and had a ‘fuel-like’ smell. A team of Professional Engineers and Geoscientists contracted by TxDOT examined the seepage and identified a fault and fractures that were transmitting contaminated groundwater. The consultant identified a service station and former Leaking Petroleum Storage Tank (LPST) site located several hundred feet up-gradient as the probable source. Seepage rates were calculated and a groundwater capture system was designed that would intercept the contaminated groundwater and channel it into a holding tank to be collected for haul-off and disposal.
The groundwater was recovered and disposed for almost a year while the highway construction continued, uninterrupted. TxDOT persuaded the TCEQ to assign a new LPST number to the service station and state contractors installed monitoring wells and began LPST investigations. A reservoir of unrecorded NAPL was identified near the service station and TCEQ assumed responsibility from TxDOT for the removal and disposal of the contaminated groundwater flowing into the ROW.
Dallas May PE, Project Manager, LCA Environmental Inc.
Dallas May PE is a Project Manager with LCA Environmental, Inc. He is a Texas-licensed Professional Engineer and TCEQ-registered LPST Project Manager. He received his B.S. in Physics from Abilene Christian University and taught high school Chemistry and Physics for a time before earning his M.S. in Environmental Engineering from Southern Methodist University. He joined LCA shortly after and has now been with the firm approximately ten years. The majority of his work experience involves hazmat investigations and mitigation for transportation and infrastructure construction, including designing both electric vehicle charging stations as well as conventional bulk fueling systems.
Mr. May regularly volunteers with civic and professional organizations; he is a Den Leader for his son’s Cub Scout Pack and is serving as the “Scouting for Food” Chair for the BSA Circle 10 Council and the White Rock Center of Hope. In 2019 he organized and produced a City of Dallas mayoral candidate debate, hosted by the ASCE Dallas Branch, which focused on infrastructure topics relevant to the City of Dallas. In 2016 and 2018, Mr. May worked pro bono with the Zimbabwe Environmental Management Agency (EMA) and the Church of Christ in Zimbabwe to conduct an investigation of groundwater contamination that threatened a small community’s water supply wells. He particularly enjoyed using his Cassegrain telescope to teach astronomy at local Zimbabwe schools and community events during his visits.
Dallas May lives in Dallas, Texas with his wife and two children.
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