Soon after the inception of ASTM D35.04 Subcommittee on Geosynthetic Clay Liners, the first symposium on Testing and Acceptance Criteria for Geosynthetic Clay Liners (GCLs), STP 1308, was held on 29 January 1996, in Atlanta, Georgia. The intention of the symposium was to bring together the current knowledge and understanding regarding this relatively new product used in containment systems. Since that symposium, numerous GCL standards have been developed along with a greater appreciation of the product's capabilities and limitations. ASTM D35 determined it was time to assess the current state of GCL technology to better address possible revisions of the present ASTM GCL standards and determine what new standards will be required in the future.
The objectives of this project were (1) to measure consumer satisfaction with tap water quality, (2) to investigate demographic trends in consumer satisfaction and consumption of tap water alternatives, (3) to identify the factors that cause consumers to purchase and use bottled water and POU/POEs, and (4) to develop a list of recommendations for water utilities that can improve consumer satisfaction and help bridge gaps between perception and reality. The following are highlights from the research project: Consumption rate of tap water alternatives is highly dependent on geographic location (20% usage rate in the Midwest vs. 80% on the West Coast). Tap water drinkers are more satisfied (20% on average) than tap water alternative drinkers concerning various aspects of tap water (e.g., overall quality, taste, appearance, smell, safety, healthiness). Tap water quality had limited influence on consumer satisfaction. The highest level of correlation (between satisfaction and water quality) was found to have an R2 - value of 34%-64% for hardness and total dissolved solids. Safety was the primary motivator for filtered water drinkers. Bottled water drinkers were divided between taste, safety, and healthiness.
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