Pierre Kwan
HDR Water Treatment Technical Director
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Pierre has 26 years of water treatment planning, design, permitting, construction, and operations experience. He has a B.S. in Civil Engineering from The Ohio State University and a M.S. in Civil Engineering from the U. of Washington. He is a licensed professional engineering in Washington and Oregon.
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Going Beyond MCLs: An Overview of Lifetime Health Advisories
All water systems need to meet maximum contaminant levels (MCLs) and secondary MCLs. However, these are additional water contaminants that the USEPA have evaluated and determined a health impact. However, for various reasons, these contaminants did not become regulations. This presentation discusses what these additional contaminants are and how water professionals should consider them.
Comparison of CCT Pipe Rig Study Data to Compliance Data: Keys to Interpretation and Decision Making
Enhanced corrosion control treatment (CCT) and pipe rig studies are required under the LCRI. WRF 5299: Assessment of CCT Pipe Rig Study Data Compared to Distribution System Lead Levels evaluates discrepancies between pipe rig studies and full-scale CCT outcomes to support more informed CCT decision-making. This session will highlight findings, tools, and guidance using data from 9 pipe rig studies compared to full-scale system data.
Beyond the Treatment Plant: How the Next M/DBP Rule Expands Utility Responsibility and Risk
The upcoming Microbial and Disinfection Byproducts (M/DBP) Rule Revisions represent a fundamental shift in how drinking water systems may be expected to manage public health risk. While historically centered on treatment compliance, this next iteration of M/DBP-related regulation is increasingly focused on distribution system performance and the control of opportunistic pathogens such as Legionella, without losing sight of disinfection byproduct (DBP) risk. This presentation discusses the various aspects of the new rule
Planning, Design, and Construction of the Ashland WTP: A 10 Year Journey
This presentation is about the long-running effort to replace a failing water plant with a new greenfield facility designed to address for turbidity, wildfires, and algal toxins.
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