There are no universal procedures for sampling Sampling programs must be tailored individually to fit each situation Quality assurance project plan(QAPP)(known previously quality assurance/quality control, QA/QC) (1).Sampling plan (2).Sample types and size (3).Sample labeling and chain of custody (4). Sampling methods 5).Sampling storage and preservation (6).Sample constituents (7). Analytical methodsThere are no universal procedures for sampling. Sampling programs must be tailored individually to fit each situation. Quality assurance project plan (QAPP) (known previously quality assurance/quality control, QA/QC). (1).Sampling plan. (2).Sample types and size. (3).Sample labeling and chain of custody. (4).Sampling methods. (5).Sampling storage and preservation. (6).Sample constituents. (7).Analytical methods