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4.2 Sample Identification Sample identification and chain of custody procedures are designed to assure sample quality and to document sample possession from the time of collection to the time of ultimate sample disposal. The container for each sample submitted for analysis will have a label affixed with the identifying number or the number will be inscribed directly on the container, if feasible. Samples will be analyzed for the analyses requested. The analytical laboratory will assign a separate number unique for that sample for internal sample coordination and identification. A description of the sample including the sample number and other pertinent information regarding its collection and/or geologic significance will be written in field notes and/or a geologic boring log prepared by the site geologist. These field documents will be kept in a permanent project file. A properly completed chain of custody form will be submitted to the analytical laboratory along with the sample. The laboratory's assigned number will be properly entered on the form. A quality control officer at the laboratory will verify the integrity of the samples submitted, proper sample volume, correctness of containers used, and a properly executed chain of custody form. Pertinent information will be entered into a log book kept by the laboratory. 4.3 Analytical Quality Assurance In addition to routine calibration of analytical instruments with standards and blanks, the analyst is required to run duplicates and spikes to assure an added measure of reliability and precision. 5.0 SITE SAFETY PLAN The Site Safety Plan used for the earlier site work will be utilized for this additional site excavation. A copy of the SSP will be present on site during all field activities. 6.0 REMARKS/SIGNATURES 6.1 Professional Qualifications Mr. Richard I. Zipp will be the responsible professional involved with this project. Mr. Zipp is a California Registered Geologist and Certified Engineering Geologist, numbers 3611 and 1096, respectively, and has 20 years of experience dealing with groundwater quality and soil contamination issues. He has performed environmental type services while employed by the State of California Department of Water Resources and the State Water Resources Control Board, Kleinfelder Associates, North American Philips Corporation, Thorne 500311 5