Reyes

ATMOSPHERIC DEPOSITION: SPATIAL AND TEMPORAL VARIATIONS IN PENNSYLVANIA 2006

James A. Lynch Professor Emeritus of Forest Hydrology School of Forest Resources Kevin S. Horner Senior Research Technologist Penn State Institutes of Energy and the Environment Jeffrey W. Grimm Research Assistant Penn State Institutes of Energy and the Environment Elizabeth Boyer, Ph.D. Associate Professor ofWatershed Hydrology School of Forest Resources Hunter Carrick Assistant Professor of Aquatic Ecology School of Forest Resources

The work upon which this report is based was supported by funds from The Pennsylvania Department of Environmental Protection through Contract Number ME359494.

Penn State Institutes of Energy and the Environment The Pennsylvania State University University Park,Pennsylvania 16802

December 2007

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TABLE OF CONTENTS Page
LIST OFTABLES.................................................................................................................................... iii LIST OF FIGURES ....................................................................................................................................v INTRODUCTION......................................................................................................................................1 NETWORK DESIGN AND OPERATION................................................................................................2 Monitoring Site Locations .............................................................................................................2 Collection Site Specifications........................................................................................................2 Protocols for Operation of Monitoring Network ...........................................................................2 Laboratory Analyses ......................................................................................................................5 Sample HandlingProcedures.........................................................................................................5 Quality Control Quality Assurance Protocols................................................................................7 Field Measurements ..........................................................................................................7 Analytical Laboratory and External Audits ......................................................................7 Data Management.............................................................................................................9 DATA REDUCTION .................................................................................................................................9 Precipitation Volume-Weighted Means.........................................................................................9 Weekly, Seasonal, and Annual...