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Sampling and Analysis Chain-of-Custody Record <br /> The sampling and analysis chain-of-custody record is initiated at the time of sampling and contains, <br /> but is not limited to, the well number, sample type,analytical request, date of sampling, and the name <br /> of the sampler. The record sheet is signed, time logged, and dated by the sampler when transferring <br /> the samples. Custody transfers are recorded for each individual sample; for example, if samples are <br /> split and sent to more than one laboratory, a chain-of-custody record sheet will accompany each <br /> sample. The number of custodians in the chain of possession will be kept to a minimum. A copy of <br /> the sampling and analysis chain-of-custody record is returned to EMCON with the analytical results. <br /> Groundwater Sampling and Analysis Request Form <br /> A groundwater sampling and analysis request form (see Figure A-4) or purchase order, or both, <br /> accompanies the samples delivered to each laboratory. These forms serve as official communication <br /> to the laboratory of the particular analysis/analyses required for each sample. <br /> At minimum, the groundwater sampling and analysis request form includes the following <br /> information: <br /> • Date submitted <br /> • Specific analytical parameters <br /> • Well number <br /> • Sample source <br /> ANALYTICAL METHODS <br /> Samples collected as part of the monitoring program are analyzed consistent with accepted analytical <br /> procedures. The following publications are the primary references for analytical procedures: <br /> • Methods for Chemical Analysis of Water and Wastes, USEPA-600/4-79-020, revised <br /> March 1983 <br /> • Methods for Organic Chemical Analysis of Municipal and Industrial Wastewater, <br /> USEPA-600/4-82-057,July 1982 <br /> • Test Methods for Evaluating Solid Wastes: Physical/Chemical Methods, USEPA SW-846, <br /> 3rd edition,November 1986 <br /> The laboratories selected to perform the analytical work are certified by the Department of Health <br /> Services (DHS) for hazardous waste testing. Maximum sample holding times are observered based <br /> on the respective analytical test method(Table A-2). <br /> Groundwater Monitoring A-7 Department of Public Works/Solid Waste <br /> County of San Joaquin <br />