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CAMB RIA <br /> Grab Ground Water Sampling <br /> Ground water samples are collected from the open borehole using bailers, advancing disposable Tygon® <br /> tubing into the borehole and extracting ground water using a diaphragm pump, or using a hydro-punch style <br /> sampler with a bailer or tubing The ground water samples are decanted into the appropriate containers <br /> supplied by the analytic laboratory Samples are labeled, placed to protective foam sleeves, stored on <br /> crushed ice at or below 4°C, and transported under chain-of-custody to the laboratory <br /> Duplicates and Blanks <br /> Blind duplicate water samples are usually collected only for monitoring well sampling programs, at a rate <br /> of one blind sample for every 10 wells sampled Laboratory-supplied trip blanks accompany samples <br /> collected for all sampling programs to check for cross-contamination caused by sample handling and <br /> transport These trip blanks are analyzed if the internal laboratory quality assurance/quality control(QA/QQ <br /> blanks contain the suspected field contaminants An equipment blank may also be analyzed if non-dedicated <br /> sampling equipment is used <br /> Grouting <br /> If the borings are not completed as wells, the borings are filled to the ground surface with cement grout <br /> poured or pumped through a tremme pipe <br /> F 1TEMPLATEISOPSICPT SAMPLING WPD <br />