Quality Assurance Project Plan for the National Pesticide Survey of DrinkingWater Wells: Hydrogeologic Characterization and Second-Stage Stratification Activities

摘要

The National Pesticide Survey will facilitate evaluation of associations amongpesticide concentrations in drinking water wells, patterns of pesticide use, and groundwater vulnerability. This groundwater vulnerability is determined on the basis of the vulnerability score as defined by the DRASTIC system. This is ICF's Quality Assurance Project Plan which addresses the activities related to assigning DRASTIC vulnerability scores at the subcounty level and developing second-stage sampling units based on cropping patterns and vulnerability scores within designated selected counties.