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spec: Erosion Laboratory ( NSERL ) at West Lafayette , Ind ., show that atrazine herbicide is often found above the U.S. Environmental Protection Agency limit for drinking water . If so , completing this form enables your Human Resources office to verify your prior service and ensure you are properly credited for the time . Whenever a business appears significantly stronger than its share price would indicate , we pounce . The National Soil Erosion Research Laboratory ( NSERL ) is the focal point for the U.S. Government 's national research program in soil erosion by water .