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ITO E RO E K SOP No.004,REv.2 AssoclATEs,INC SOIL SAMPLING PAGE 13 sampler is withdrawn. EnCoreTM samplers or VOA plungers should be filled with soil taken directly from the tube sampler. Before use, and during storage and transport, the tube sampler should be capped with a nonreactive material. For physical sampling parameters, the tube is sealed using plastic caps. The top and bottom of the tube sampler should be labeled and the tube sampler should be stored accordingly 2.4.3 Direct-Push Technology Sampler Geoprobe systems utilize DPT. In many cases, DPT is less expensive and faster than collecting soil samples with a standard drilling rig. In addition, the use of DPT causes minimal disturbance to the ground surface and generates little to no soil cuttings. DPT uses acetate or clear polyvinyl chloride (PVC) sleeves for collecting soil samples. Upon retrieval of the sampling rod from the ground, the sample sleeve is extruded from the sampling rod. The sleeve is sliced lengthwise twice, to open the sleeve. Soil samples can be collected directly from the opened sleeve. If VOA samples are to be collected, EnCoreTM samplers or VOA plungers should be filled with soil taken directly from the opened DPT sampler. Samples for other specific chemical analyses should be taken after the VOA sample has been collected. The remainder of the recovered soil can then be used for visual classification of the sample and containerized for physical analysis. The entire sample is retained for analysis or disposal. 2.5 FIELD QUALITY CONTROL CHECK Before leaving each sampling site, take time to complete a quality control (QC) check of the collected samples and documentation.An opportunity to correct any field sampling errors may not be possible after leaving the site. The QC check should include the following: • Inspection of all sample containers to determine that no required samples have been forgotten and an adequate volume of each sample has been collected. Note: Determining that all required QC samples have been collected is a part of this inspection (e.g., ambient blanks,trip blanks, duplicates, matrix spike/matrix spike duplicate (MS/MSD), rinsates, temperature blanks). • Inspection of all coolers to determine that adequate ice is included and that a temperature blank has been included in each cooler. • Inspection of the field log book to determine that all data entries are accurate and complete.