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FUGRO WEST, INC. <br /> STANDARD OPERATING PROCEDURE <br /> RE: HYDROPUNCH SAMPLING <br /> SOP-14 <br /> Starting from the capillary fringe, the hydropunch is pushed so that the tip is approximately 3 feet below the <br /> water table The sleeve protecting the 4-foot PVC screened interval is then pulled up 3 5 feet, exposing the <br /> screened interval to the capillary fringe and the saturated zone The system is left undisturbed for approximately <br /> 15 minutes to allow formation water to infiltrate the screen, and fines to settle out <br /> The sampling equipment consists of either a "Teflon" or stainless steel bailer In general and depending on the <br /> intended laboratory analysis, 40-milliliter glass, volatile organic analysis (VOA) vials, with "Teflon" septa, are <br /> used as sample containers <br /> The groundwater sample is decanted into each VOA vial in such a manner that there is no meniscus at the top <br /> of the vial A cap is quickly secured to the top of the vial The vial is then inverted and gently tapped to see <br /> if air bubbles are present If none are present, the vial is labeled and refrigerated for delivery, under strict chain- <br /> of-custody, to the analytical laboratory Label information includes a unique sample identification number,fob <br /> identification number, date, time, type of analysts requested, and the sampler's name <br /> For quality control purposes, a field blank may be prepared in the field The field blank is prepared after a <br /> bailer has been either steam cleaned or properly washed, prior to use in the next well, and is analyzed along <br /> with the other samples The field blank analysis demonstrates the effectiveness of the in-field cleaning <br /> procedures to prevent cross-contamination <br /> To minimae the potential for cross-contamination between wells, all well development and water sampling <br /> equipment not dedicated to a well is either steam cleaned or properly washed between use <br /> In the event the water samples cannot be submitted to the analytical laboratory on the same day they are <br /> collected (e g , due to weekends or holidays), the samples are temporarily stored until the first opportunity for <br /> submittal either on ice in a cooler, such as when in the field, or in a refrigerator at Fugro's office <br /> is <br /> Fugro Wad I� <br /> SOPAVOdo6ar 1994 <br />