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original imprint of the CHAIN-OF-CUSTODY <br /> containers• RECORD will accompany <br /> a duplicate copy will be kept in the sample <br /> P the Ge project file. <br /> If the samples are to be shipped to the laboratory, the original <br /> relinquishing the samples CHAlN-OF-CUSTODY <br /> will be sealed ' <br /> will be sealed with custod inside a plastic bag within the ice chest, and the chest <br /> Y tape which has been signed and dated by the last person listed on <br /> the chain-of-custody. U.S. Department of Transportation <br /> followed and the sample shi p nation shipping requirements will be <br /> PPing receipt will be retained in the project files as part of the <br /> Permanent chain-of-custody document. The shipping company DHL) will not sign the chain-of custody forms as a receivor; y (e g , Federal Express, UpS, <br /> instead the laboratory will sign <br /> as a receivor when the samples are received. <br /> 5.0 SOIL FIELD SCREENING <br /> Soil will occasionally be screened using a field instrument or method. Readings should be <br /> recorded on the BORING LOG, WELL LOG, DAILY FIELD RECORD or another form <br /> Prepared for this purpose. Two screening methods are described below. <br /> 5.1 ORGANIC VAPOR NdETERS <br /> A portable photoionization detector (PID), flame ionization detector (FID), lower explosive <br /> limit meter (LEL), or other type of organic vapor meter (OVM) may be used to screen soil. <br /> The purpose of the field screening is to assess the presence of volatile organic compounds <br /> (VOCs) in the soil. The meter measures total VOCS in the air in parts per million (ppm) by <br /> volume in reference to a selected standard. The meter will be calibrated each day prior to the <br /> soil sampling. The meter cannot specifically identify each volatile compound, but can be <br /> adjusted to be sensitive to selected volatile organics. Before choosing a meter, the response <br /> factor of the meter to the chemicals of concern at the site should be considered. Soil should be <br /> screened as soon as possible after being exposed to the atmosphere. The general procedure for <br /> screening is as follows: <br /> MSCIPROTOSS.TXT SOIL SAMPLING FOR CHEMICAL ANALYSIS <br /> Page 5 of 6 <br /> REVISION DATE:MARCH 1996 SS-5 <br />