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CAMBRIA <br /> After a soil sample has been collected,soil from the remaining tubing is placed inside a sealed plastic bag and <br /> set aside to allow hydrocarbons to volatilize from the soil After ten to fifteen minutes, a portable <br /> photoionization detector measures volatile hydrocarbon vapor concentrations in the bag's headspace,extracting <br /> the vapor through a slit in the plastic bag The measurements are used along with the field observations,odors, <br /> stratigraphy and ground water depth to select soil samples for analysis <br /> Grab Ground Water Sampling <br /> Ground water samples are collected from the open borehole using bailers,advancing disposable Teflon tubing <br /> into the borehole and extracting ground water using a diaphragm pump,or using a hydra punch style sampler <br /> with a bailer or tubing The groundwater samples are decanted into the appropriate containers supplied by the <br /> analytic laboratory Samples are labeled,placed in protective foam sleeves,stored on crushed ice at or below <br /> 4°C,and transported under chain-of-custody to the Iaboratory <br /> Duplicates and Blanks <br /> Blind duplicate water samples are usually collected only for monitoring well sampling programs,at a rate of <br /> one blind sample for every 10 wells sampled Laboratory-supplied trip blanks accompany samples collected <br /> for all sampling programs to check for cross-contammation caused by sample handling and transport These <br /> trip blanks are analyzed if the internal laboratory quality assurance/quality control(QA/QQ blanks contain the <br /> suspected field contaminants An equipment blank may also be analyzed ifnon-dedicated sampling equipment <br /> is used <br /> Grouting <br /> If the borings are not completed as wells,the bonngs are filled to the ground surface with cement grout poured <br /> or pumped through a tremie pipe <br /> G 10-MGM-RTemp1ates-Boi1ers%CPT SOP wpd <br /> I <br /> I <br /> i <br /> i <br />