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h'j KLEINFELDER File No. 20-3937-01 September 3, 1996 After the samples are collected they are individually labeled. The label includes Kleinfelder's name, job number, the date and time the sample was collected, the employee number of the individual who performed the sampling, and a unique five-digit sample identification number. A custody seal is also placed oil the Sample in such a way that any attempt to tamper with the sample is easily visible. An example of' a sample label and custody seal are attached at the end of this appendix. B-2.4 Qualitative Field Set-e'eftLn An organic vapor detector, such as a Photovac TIP, using a photoionization detector (PID) or a Foxboro flame ionization detector (Y-1f)), is used to provide it qualitative screening of each soil sample collected frons (lie borings. The organic vapor detector measures ionizable compounds in the air in parts per million by volume (ppniv), field calibration is performed using a calibrated span gas. Ambient air is used to set the iilstrumeilt zero. A calibration fora] is attached. The soil contained in the cone of the sampler or in a brass tube is exposed and screened with the organic vapor detector. The vapor reading is noted as the field screening result. For the protection of'tile drilling crew, the organic vapor detector is also used to measure the volatile concentrations in the breathing Toile prior to and during the drilling of the samples. Total ionizable hydrocarbon ,readings in excess of one ppnly may necessitate respiratory protection for the affected crew nlcnlbers. ,This requirement is included in the complete field health and safety plan developed for the project prior to tlle,start of field work. 13-2.5 Sample 1-1i idling, After labeling, the sample is immediately stored in an iced cooler for transport to Kleinfelder's h office sample control or to the analytical laboratory. A Kleinfelder chain-of-custody form is attached to the cooler. The chain-of=custody form includes Kleinfelder's name, address and telephone number, the employee ilunlber of the individual who performed the sampling, the sample nuinbers, the date and:time the samples were collected, the number of containers each sample occupies, and the analyses for which the samples are being submitted, if any. The chain-of-custody form is signed by each person who handles the samples, including all Kleinfelder employees and the receiving .employee of the analytical laboratory when the samples arc delivered. An example of the chain-of custody form is attached to this appendix. 20-3937-01/MR960189 Page No. B-2 Copyright 1996. Kleinfelder, Inc.