Dewatering System

Advanced Remediation Technologies, Co. was retained as a Design/Build contractor for the completion of a dewatering system. The dewatering system was needed for an eleven story high-rise with subterranean parking that was being inundated with rising groundwater levels in the subterranean parking structure. The client retained our staff to evaluate an existing design and make recommendations to its implementablility and offer alternatives that would provide cost savings and meet a stringent construction schedule. In addition to providing design review and alternative revisions, the client retained our services for installation of the system. The groundwater to be extracted exceeded water quality standards for numerous volatile organic compounds. Contaminants of concern included the chlorinated solvents terachloroethylene (PCE), trichloroethylene (TCE), 1,2-dichloroethane (1,2-DCA), and cis-1,2-dichloroethene (cis-1,2-DCE) which came from an adjacent defunct dry cleaners site that disposed of spent cleaner solvents into a dry well and benzene, toluene, ethyl benzene, and total xylenes (BTEX) from numerous adjacent service station sites with leaking underground storage tanks.

Our staff evaluated alternatives for installation of the mechanical portion for dewatering system utilizing HDPE piping, while at the same time implemented the design changes. Unique construction conditions for this project included; minimal or no effect disturbances of the tenants in the high rise during installation, installation of materials with consideration of an effective minimum life-cycle of 30-years, design changes that provided better operator control and maintenance of the system.

Advanced Remediation Technologies not only came in under budget for this project but completed the project ahead of schedule. Additional cost saving were realized on top of the design changes because of the completion schedule and passed on to the client.

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