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fi of custody may be found in Figure 7. At the sampling site each sample is labeled with the date and time of sampling, the name of the client, the name of the sampler, the client's sample identification, and any other pertinent information. At the same time the chain of custody - form is filled out with the same information as well as the address and phone number of the client, the containers and preservatives used, and the analyses requested. When the samples are received at the laboratory, the personnel in Sample Control check to ensure that all samples listed on the chain of custody are, in fact, present and in satisfactory condition. They sign and date the form and store the samples appropriately in an area that is restricted to Sequoia Analytical staff only. In the case where samples are brought in by clients without chains of custody, Sequoia will provide a blank form and then a copy of the completed, signed version. In addition to ensuring that the sample is documented fully, the Sample Control personnel are responsible for determining if there is sufficient sample to do the analyses requested and that holding times have not been violated. They are also responsible for splitting those samples that have multiple analyses scheduled and for compositing. Problems with sample integrity or paperwork inconsistencies are reported to the Project Manager who will take corrective action. Upon being received at Sequoia Analytical, each sample container is given a unique sample number and stored appropriately in cold storage or at room temperature in an orderly fashion to ensure that the analyst may quickly find the appropriate container for their analysis. Each of these -- unique sample numbers are entered in a bound logbook along With the clients name, the general analytical departments associated with the analytical requests, the turnaround status, and whether the sample is in acceptable condition or not. An example of a log-in form can be found in Figure 8. Hazardous sample are stored in a separate less frequented area to minimize exposure and to avoid possible accident. Hazardous samples are divided up according to hazard and Red- ragged. After analysis the level of the contaminant, particularly PCB's and cyanide, MUSS' be shown on the outside of the container. The hazardous categories include Flammables, Asbestos, PCB's, Cyanides, and Acids. Samples are kept in house for 4-6 weeks after analysis unless special arrangements have been made.