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k <br /> i' <br /> i� <br /> 0 A-6 <br /> All instruments will be calibrated in accordance with manufacturer methods. The values for <br /> conductivity standards and pH buffers used in calibration will be recorded daily in a field <br /> notebook. All probes will be thoroughly cleaned and rinsed with fresh water prior to any <br /> measurements, in accordance with Section 3.1. E <br /> r i <br /> 5.0 SAMPLE CUSTODY !` <br /> r <br /> �k <br /> i� <br /> This section describes standard operating procedures far sample custody and custody <br /> documentation. Sample custody procedures will be followed through sample collection, transfer, <br /> analysis, and ultimate disposal. The purpose of these procedures is to assure that (1) the <br /> integrity of samples is maintained during their collection, transportation, and storage prior to <br /> analysis and (2)post-analysis sample material is properly disposed of. Sample custody is divided <br /> into field procedures and laboratory procedures, as described below. <br /> 5.1 Field Custody Procedures <br /> I� <br /> Sample quantities, types, and locations will be determined before the actual fieldwork <br /> commences. As few people as possible will handle samples: They field sampler is personally <br /> responsible for the care and custody of the collected samples until tl ey are properly transferred. <br /> it <br /> 5.1.1 Field Documentation <br /> Each sample will be labeled and sealed properly immediately k after collection. Sample <br /> identification documents will be carefully prepared so that identification and chain-of-custody f <br /> records can be maintained and sample disposition can be controlled. Forms will be filled out F <br /> with waterproof ink. The following sample identification documents will be utilized. <br /> • Sample labels <br /> • Field notebook <br /> • Chain-of-custody forms <br /> i� <br /> 5.1.2 Sample Labels <br /> f <br /> Sample labels provide identification of samples. Preprinted'{sample labels will be provided. <br /> Where necessary, the label will be protected from water and solvents'with clean label-protection <br /> tape. Each label will contain the following information: <br /> • Name of collector F ' <br /> • Date and time of collection <br /> • Place of collection i <br /> i� <br /> LRPT008.MAF <br /> M <br /> I� <br />