The Incremental Sampling Methodology (ISM) web-based document describes the principles and the approaches needed to ensure representative, reproducible, and defensible data during soil sampling. ISM involves planning, sample collection, and laboratory processing and analysis to provide a representative sample with results that more accurately reflect the mean concentration of the area of interest than discrete samples. The ISM document provides you the key principles regarding sampling and sampling error and how ISM reduces those errors so that you can have more confidence in your sampling results.
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Helps regulators, consultants, industry, and stakeholders in understanding the principles, application, and implementation of Incremental Sampling Methodology (ISM). The document provides users with information on: advantages and limitations of ISM, how to develop an ISM approach, establishing decision units, field implementation, laboratory processing and analysis issues, data assessment, and regulatory considerations. Case studies are provided to aid users in how ISM has been implemented at various sites.