Presenting on Solutions for Drinking Water

Chase Stearnes, PE, to present at Tri-State.

Chase Stearnes, PE, to present at Tri-State.

DBS&A Engineer Chase Stearnes, PE, will be presenting at the 38th Annual Tri-State Seminar (TSS) taking place in Las Vegas, Nevada, from August 7 to 10, 2023. Don Hanson, PG, and Geno Mammini, PG, from Geo-Logic Associates affiliate Clear Creek Associates LLC, will be moderating the session on Groundwater/Recharge.

This year’s theme of the seminar, “Weird Science: Predicting and Protecting Human Health and the Environment,” points to the impact that safe drinking water and properly treated wastewater has on human health and our communities.

The TSS provides education to water and wastewater operators from the western United States for professional development, continuing education, and technology transfer to support the vision and missions of TSS’s partner organizations; AZ Water Association, California Water Environment Association and the Nevada Water Environment Association.

Mr. Stearnes will be presenting on the “Griggs-Walnut Groundwater Plume Superfund Site: From Dry Cleaner to Clean Drinking” and co-presenting with Michael Alvidrez from Alvidrez Water Operations on “Pumps and Motors for Water Operators.”

Learn about DBS&A’s water quality services here. For more information on TSS, click here.

The Presentations

More on Mr. Stearnes’ Griggs-Walnut presentation:

Access to drinking water will always be hot topic in the desert Southwest, and meeting demands can be even more complex when contamination enters the groundwater supply. In 1993, tetrachloroethylene (PCE), a common degreasing and dry-cleaning agent, was first detected in the groundwater in Las Cruces, New Mexico. This discovery eventually became the Griggs-Walnut Groundwater Plume Superfund Site. By operating a groundwater extraction and air stripping treatment system, Las Cruces is continuing to satisfy water supply demands while meeting drinking water standards and improving the City’s groundwater supply quality for future use. The facility processes more than 350,000 gallons of water per day, removing PCE and making the water suitable for drinking. Treated water is transferred to the City’s distribution system for consumption. This presentation will review the requirements, challenges, and successes of operating this system.

More on Stearnes’ and Alvidrez’s co-presentation on Pumps and Motors:

This presentation will review types of pumps and how they work (centrifugal and positive displacement; horizontal and vertical; vertical turbine and submersible), components of pumps (shafts, seals, packing and glands), terminology (head, flow rate, pressure), pump hydraulics such as the relationship between pressure and head, and the concept of net positive suction head and total dynamic head, pump and motor efficiencies, how to read a pump curve, and maintenance and troubleshooting.