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wood. required for each relinquished/received transfer, including transfer within Wood Environment & Infrastructure Solutions, Inc. The original imprint of the CHAIN-OF-CUSTODY RECORD will accompany the sample containers; a duplicate copy will be kept in the Wood Environment & Infrastructure Solutions, Inc., project file. If the samples are to be shipped to the laboratory, the original CHAIN-OF-CUSTODY relinquishing the samples will be sealed inside a plastic bag within the ice chest, and the chest will be sealed with custody tape which has been signed and dated by the last person listed on the chain-of-custody. U.S. Department of Transportation shipping requirements will be followed and the sample shipping receipt will be retained in the project files as part of the permanent chain-of-custody document. The shipping company (e.g., Federal Express, UPS, DHL)will not sign the chain-of-custody forms as a receiver; instead the laboratory will sign as a receiver when the samples are received. 5.0 SOIL FIELD SCREENING Soil will occasionally be screened using a field instrument or method. Readings should be recorded on the BORING LOG, WELL LOG, DAILY FIELD RECORD, or another form prepared for this purpose. Two screening methods are described below. 5.1 ORGANIC VAPOR METERS A portable photoionization detector (PID), flame ionization detector(FID), lower explosive limit meter(LEL), or other type of organic vapor meter (OVM) may be used to screen soil. The purpose of the field screening is to assess the presence of volatile organic compounds (VOCs) in the soil. The meter measures total VOCs in the air in parts per million (ppm) by volume in reference to a selected standard. The meter will be calibrated each day prior to the soil sampling. The meter cannot specifically identify each volatile compound, but can be adjusted to be sensitive to selected volatile organics. Before choosing a meter, the response factor of the meter to the chemicals of concern at the site should be considered. Soil should be screened as soon as possible after being exposed to the atmosphere. The general procedure for screening is as follows: 1. Using a clean tool, dig a hole to expose fresh soil in a backhoe bucket or stockpile, or separate the brass liners from a driven sample. 2. Insert the probe of the OVM into the hole, taking care not to clog the probe with soil. Alternatively, headspace readings may be taken by placing soil in a covered (e.g., aluminum foil or Teflon® sheet) clear glass jar or plastic resealable bag, and after several minutes have elapsed, introducing the probe into the headspace area. No soil sample used for headspace screening will be submitted to the laboratory for chemical analysis. H:\AMEC\Field Protocols\Wood Protocols\PROTO-SS 0802.doc SOIL SAMPLING FOR CHEMICAL ANALYSIS Revision Date: February 2015 Page 4 of 5