| Title: |
Helotes Mulch Fire 2006 Tracing Groundwater Flow Using Natural Fluorescent Materials |
Description:
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With approximately 21 million gallons of water (LFCI, 2011) having been trained on the debris pile, the Helotes mulch fire effectively became a tracer test of huge proportions. It provided an opportunity for us to study the karst-related flow characteristics of the Edwards and Trinity aquifers. The fire-fighting water mobilized naturally fluorescing woody material and products of combustion that could be measured in groundwater using conventional fluorescence spectroscopy. Results revealed many of the characteristics of karst in both aquifers.
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| Title: |
Blasting Effects on Engineered Structures |
Description:
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Report of field study on effects of blasting charges on structure and function of nearby pipes, wells, and tanks. See accompanying appendices.
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| Title: |
Blasting Effects on Engineered Structures Appendices A-G |
Description:
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Appendices A-G to main companion report.
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| Title: |
Blasting Effects on Engineered Structures Appendices H, I ,J |
Description:
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Appendices H, I, J to main companion report
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| Title: |
Universal Passive Samplers and the Aliasing Problem in Groundwater Sampling |
Description:
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AY-68-29-418 (Rio Seco) was selected for this study because it is within the Recharge Zone of the Edwards Aquifer surrounded by urban development, and water samples contain consistent PCE concentrations. AY-68-29-418 was sampled eight times to determine the correlation between PCE concentrations from universal passive samplers and water quality grab samples. EAA field staff exchanged the universal passive samplers every 48 hours, one universal passive sampler for one-hour exposure time, and two universal passive samplers for ten days exposure time. During each retrieval of universal passive samplers, EAA field staff also obtained a grab sample.
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| Title: |
Water Quality Trends Analysis of the San Antonio Segment, Balcones Fault Zone Edwards Aquifer, Texas |
Description:
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Collection and analysis of thousands of groundwater, surface water, and spring water samples to evaluate water quality in the San Antonio segment of the Balcones Fault Zone Edwards Aquifer of south central Texas.
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