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Page 3 <br /> SIZOPImg Metbnds <br /> used during the above-described operations that are shown to contain potentially hazardous materials will <br /> be disposed of Ippropnately <br /> Residual substatues generated during cleanM procedures that are known or suspected to pose a threat to <br /> human health or the environment will be placed in appropriate containers until chemical testing has been <br /> completed to detemnne the proper means for their disposal <br /> C.4 CoadiactirSty,Temperature, and pH <br /> Specific condudtasice, water temperature, and pH measurements will be made when a water sariiple is <br /> collected Regardless of the sample collection method, a representative water sample will be placed in a <br /> transfer bottle used solely for field parameter determ.nations A conventional pH meter with a <br /> combination electrode or egtnvalent will be used for field-specific conductance measurements <br /> Temperature measurements will be performed using standard themiomerers or equivalent temperature <br /> meters Combination instruments capable of measuring two or all three of the parameters may also be <br /> used <br /> All instruments will be calibrated in accordance with manufacturer's recomrnendauons The values far <br /> conductivity stuKlards and pH buffers used in calibration will be recorded in a field notebook All probes <br /> will be thoroughly cleaned and rinsed with fresh water prior to any measurements, in accordance with <br /> Section C 1 <br /> D SANgL.E CUSTODY <br /> This section describes standard operating procedures for sample custody and custody documentation <br /> Sample custody procedures will be followed through sample collection, transfer, anaIysis, and ultimate <br /> disposal The purpose of these procedures is to assure that(1) the uitegrty of samples is maintained <br /> during their collection, transportation, and storage prior to analysis and (2) post-analysis sample material <br /> is properly disposed of Sample custody is divided into field procedures and laboratory procedures, as <br /> desen'bed below <br /> D 1 Field Custody Procedures <br /> Sample quantities,types, and locations will be determined before the actual fieldwork commences As <br /> few personnel as possible will handle samples The field sampler is personally resFonsible for the care <br /> and custody of the collected samples until they are properly transferred <br /> D i 1 fold Documentation <br /> Each sample will be labeled and sealed properly immediately after collection Sample identification <br /> documents will be carefully prepared so that identification and chain-of-custody records can be maintained <br /> and sample disposition can be controlled Forms will be filled out with waterproof ink The follow.na <br /> sample identification documents will be utilized <br /> • Sample Labels <br /> • Field notebook <br /> • Chain-of-custody forms <br />