Potable Water Treatment Study and Water Quality Characterization

Banner was hired to investigate and characterize the organic constituents of the raw and treated water for a large industrial client. Concerns by the client over the existence, and potential chronic exposure of toxic process effected organics and their associated disinfection by-products after chlorination, required that Banner develop novel sample preparation procedures, as well as import sophisticated analytical systems (GC analysis under water phase extractions) from other industries to help delineate these organic constituents. The analytical procedures developed by Banner (2-3 years of investigation), allowed for the collection of analytical evidence identifying the existence of these process effected toxic organics in the both the source and treated drinking water. This analytical evidence was combined with other compelling engineering assessment data collected regarding the local watershed and groundwater conditions to further establish the existence of these process effected toxic organics. Banner complemented this work by pilot testing various treatment alternatives to remove these toxins from the drinking water. A process configuration was developed that was capable of removing these constituents to well below any levels of analytical detection. The selected configuration used only proven technology and was carefully selected to maximize the reuse of existing infrastructure and complement existing plant operations staff.

The final report outlined these study findings in detail and included preliminary engineering design sizing that allowed for accurate estimates of major equipment components for the proposed upgrade. The capital cost estimations indicated a "reasonable" cost compared to other municipalities of similar size and geographical location. Furthermore, the estimated overall operating costs from the pilot study indicated that a significantly lower cost than the current operation could be observed. The study represents a comprehensive assessment of the potable water treatment and distribution problems the client currently faces, and distils their very complex problem into a tangible action plan. The final report was submitted to the client and a formal peer evaluation of the study was undertaken. The findings of the peer evaluation supported the study and the project is now underway to write a design basis memorandum to facilitate the detailed design and eventual construction of a new plant.

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