To keep our environmental industry clients and colleagues informed of recent and recognized developments in environmental remediation technologies and techniques, AST employs several methods of providing technology transfer that we feel are relevant, flexible, and important to our clientele. From live webinars to in-person presentations to on-demand training, our goal is to connect you with our experienced senior staff in a technical learning format that provides the proper assistance, collaboration, and efficient use of your time. Strongly, AST believes the information we present live or on-demand encompasses the best-available technology and techniques to remediate sites small and large, from heavily-impacted source areas to dilute plumes, phreatic to vadose zone, and comingled contamination to site civil activities.

Webinar archive

Using the RPI Group’s GeoTAP Method to Overcome DPT Refusal at Remedial Injection Sites

Wednesday, December 14th

9 AM Pacific / 12 PM Eastern

Upcoming webinar hosted by RPI Group

The final presentation of our 2022 webinar series where we will discuss how AST and the RPI Group uses the GeoTAPTM methodology and provide examples of successful implementation. The GeoTAPTM methodology (pre-drilling injection locations) is used to bypass zones or achieve depths where DPT refusal occurs in the subsurface, allowing access to these vertical depths with DPT rigs after completion. Examples of zones that benefit from this installation process include gravel/cobble, glacial till, chert layers, caliche layers, breccia layers, stiff clays, weathered bedrock, urban fill, and more. The GeoTAPTM process involves advancing sonic or HSA/SSA rigs to targeted depths and then backfilling with a hydrated bentonite-based mixture. Once the backfill has set, a DPT rig can be used to push injection rods through the bentonite mix column and high-pressure injections at targeted intervals can commence.

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Webinar Archive