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i • 2 .0 ANALYTICAL PROCEDURES All soil samples submitted for the laboratory will be analyzed BTEX, TPPH, and total lead using EPA Methods 8020, 8015 (mod. ) and 7421, respectively. Ground water samples submitted to the laboratory will be analyzed for the same petroleum hydrocarbon constituents as the soil samples using EPA Methods 624 . 2/8240, 7421, respectively. 3.0 QUALITY ASSURANCE PLAN 3. 1 General Sample Collection and Handling Procedures Proper collection and handling are essential to ensure the quality of a sample. Each sample will be collected in a suitable container, preserved correctly for the intended analyses, and stored prior to analysis for no longer than the maximum allowable holding time. Details on the procedure for collection and han- dling of soil samples to be used on this project can be found in Section 1. 0 (Methods) . 3.2 Sample Identification and Chain-of-Custody Procedures Sample identification and chain-of-custody procedures ensure sample integrity and document sample possession from the time of collection to its ultimate disposal. Each sample container submitted analysis will have a label affixed to identify the job number, date, and time of sample collection, and a sample number unique to that sample. This information, in addition to a de- scription of the sample, field measurements made, sampling methodology, names of on-site personnel, and any other pertinent field observations will be recorded on the borehole log in the field records. All samples will be analyzed by a State-certified laboratory. A chain-of-custody form will be used to record possession of the sample from time of collection to ifs arrival at the laboratory. When the samples are shipped, the person in custody of them will relinquish the samples by signing the chain-of-custody form and noting the time. The sample-control officer at the laboratory will verify sample integrity and confirm that it was collected in the proper container, preserved correctly, and that there is and adequate volume for analysis. If these conditions are met, the sample will be assigned a unique log number for identification throughout analysis and reporting. The log number will be recorded on the chain-of-custody form and in the legally-required log book maintained by the laboratory in the laboratory. The sample description, date received, client's name and any other relevant information will also be recorded.