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2. A benthic-macroinvertebrate index of biotic integrity and assessment of conditions in selected streams in Chester County, Pennsylvania, 1998-2009
3. Estimated suspended-sediment loads and yields in the French and Brandywine Creek Basins, Chester County, Pennsylvania, water years 2008-09
4. Groundwater-quality monitoring program in Chester County, Pennsylvania, 1980-2008
5. Altitude and configuration of the potentiometric surface in the upper White Clay Creek and lower West Branch Brandywine Creek basins including portions of Penn, London Grove, New Garden, Londonderry, West Marlborough, Highland, and East Fallowfield Townships and West Grove, Avondale, Modena, and South Coatesville Boroughs, Chester County, Pennsylvania, May through July 2006
6. Drought-trigger ground-water levels in Chester County, Pennsylvania, for the period of record ending May 2006
7. Effect of on-site wastewater disposal on quality of ground water and base flow : a pilot study in Chester County, southeastern Pennsylvania, 2005
8. Altitude and configuration of the potentiometric surface in the lower White Clay Creek and upper Christina River basins including portions of Franklin, London Britain, New Garden, and New London Townships, County, Pennsylvania, June through September 2005
9. Altitude and configuration of the potentiometric surface in east Nottingham and west Nottingham townships, Chester County, Pennsylvania, April through June 2004
10. Altitude and configuration of the potentiometric surface in part of Lower Oxford, East Nottingham, and West Nottingham Townships, and in part of the Borough of Oxford, Chester County, Pennsylvania, April through June, 2003
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