Hydrologic And Water Quality Data For The Weldon Spring Ordnance Works St Charles County Missouri 1992 95

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ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (16 download)

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Download or read book Geohydrologic Data for the St. Charles County Well Field and Public-water Supply 1985-91, and Projected Public-water Supply, 1995 and 2000, for St. Charles County, Missouri written by and published by . This book was released on 1996 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geohydrologic data for this well field and public water supply data for St. Charles County were compiled to assist US DOE in developing the St. Charles County well field contingency plan to ensure a supply of water in the event that the well field becomes contaminated from wastes (radioactive, nitroaromatic, other) stored in the Weldon Spring quarry. The well field consists of 8 wells penetrating the entire thickness of the Missouri River alluvial aquifer and is 98-116 feet deep. Aquifer tests were conducted on 3 occasions at 3 different locations in the well field. Calculated transmissivities range from 900 to 60,200 feet squared per day; hydraulic conductivities ranged from 23 to 602 feet/day. Calculated/estimated storage coefficients ranged from 0.005 to 0.2. Tracer test showed effective porosity of 0. 21-0.32. Point dilution showed a ground-water velocity of 0.83 foot/day. From 1985-91, ave daily water supply from the well field and water treatment plant increased from 5.76 to 10.23 Mgd; this is projected to increase to 11.0 Mgd in 1995 and to 12.2 Mgd in 2000. The water departments̀ projections of peak daily demands from customers indicate that these demands will exceed the capacity of the treatment plant in 1995 and will exceed the capacities of the well field and plant during 2000.