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. FIELD PROCEDURES <br /> Ll Soil Sampling <br /> Soil samples were collected using a hand auger. After the auger had been advanced to the desired <br /> depth,a clean brass tube was then placed in the auger bucket and pushed into the soil in the bucket of <br /> the auger The tube was then extracted and each end of the tube sealed with Teflon tape and a plastic <br /> cap The tube was then labeled with the appropriate identification number The sample Iiner was <br /> placed in an ice chest which contained pre-frozen blocks of an inert ice substitute, such as Blue Ice. <br /> I. <br /> 1.2 Sam ie Identification and Chain-of-Custodv Procedures <br /> Sample identification and chain-of-custody procedures ensure sample integrity and document sample <br /> possession from the time of collection to its ultimate disposal. Each sample contained submitted for <br /> analysis had a label affixed to identify the job number,sampler,date and time of sample collection,and <br /> a sample number unique to that sample This information, in addition to a descnption of the sample, <br /> field measurements made,sampling methodology, names of on-site personnel, and any other pertinent <br /> field observations were recorded in the field records All samples were analyzed by a California-certified <br /> laboratory. <br /> A chain-of-custody form was used to record possession of the sample from tune of collection to its <br /> arrival at the laboratory When the samples were shipped, the person in custody of them relinquished <br /> the samples by signing the chain-of-custody form and noting the time of shipment. The sample-control <br /> officer at the Iaboratory verify sample integrity and confirms that it was collected in the proper <br /> container, preserved correctly, and that there is an adequate volume for analysis <br /> The sample was then assigned a unique Iog number for identification throughout analysis and reporting <br /> The log number was recorded on the chain-of-custody form and in the legally-required log book <br /> maintained by the Iaboratory The sample description, date received, client's name, and any other <br /> relevant information was recorded <br /> 1-3 Analytical Ouality Assurance <br /> In addition to routine calibration of the analytical instruments with standards and blanks, the analyst is <br /> required to run duplicates and spikes on 10 percent of the analyses to insure an added measure of <br /> precision and accuracy. Accuracy is also verified through the following- <br />