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t <br /> GROUND ZEROANALYSV,INC. <br /> FIELD PROCEDURES <br /> containers. The recovered fluids from sampling each well are directed into 55-gallon liquid <br /> waste drums approved for this use by the Department of Transportation until suitable disposal <br /> options are selected based on analytical results. Disposal of water at an appropriate disposal i <br /> facility is the responsibility of the client. <br /> Sample containers are labeled in the field with the job number, sample location and depth, and <br /> date and promptly placed in iced storage for transport to the laboratory. A Chain of Custody <br /> record is initiated by the technician/geologist and updated throughout handling of the samples <br /> and accompanies the samples to a laboratory certified by the State of California. <br /> Chain Of Custody Record And Sample Analysis Request Form <br /> A chain of custody recoid for each container or sample is used to track possession of the samples <br /> from the time they are collected in the field until the time they are analyzed in the laboratory. The <br /> chain of custody record contains the following information: <br /> I <br /> .1. Site Name <br /> 2: Signature of collector <br /> 3. Date and time of collection <br /> 4. Sample identification number(s) <br /> 5. Number of containers in sample set <br /> 6. Description of sample and container(s) <br /> 7. Name and signature of persons, .and the companies or agencies they <br /> represent,who are involved in the chain of possession <br /> 8. Inclusive dates and times of possession <br /> 9. Requested analysis for each sample <br /> Samples are transported to the laboratory promptly to help- ensure that recommended sample <br /> holding times will not be exceeded. <br /> Sampling Equipment Decontamination <br /> All equipment used for sampling is decontaminated prior to use. All equipment used for collection <br /> of more than one sample, such as bailers'.and sampling shoes, is decontaminated between each use <br /> to prevent cross contamination between samples. Decontamination is conducted on .an <br /> impermeable surface or in buckets and all decontamination. effluent is contained or recycled. <br /> Sample equipment to be used for pesticides and organic analysis is washed in a laboratory grade <br /> detergent(Alconox or equivalent)and rinsed with tap water and/or deionized water. <br /> r <br /> 4 <br /> groundzelformsltl d-proc:doc <br />