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s,m,ii»e Irictbods ' Page 3 <br /> used during the above-described operations that arc shown to contain potentially hazardous taatenals will <br /> be disposed of 4*ropnately <br /> Residual subs==s gerurated during ciea=g procedures that are known or suspected to pose a threat to <br /> bunnan health or the enviroc meat will be placed in appropriate containers until chemical testing has been <br /> completed to deterrmne the proper means for then disposal <br /> C.4 Conductivity, Temperature, and pH <br /> Specific conductance, water temperature, and pH measureuueats will be made when a water sample is <br /> collected Regardless of the sample collemion nwthod, a representative water saiMle will be placed in a <br /> transfer bottle used solely for field parameter detersn-nations A conventional pH outer with a <br /> corribmauon electrode or equivalent will be used for field specific cofiductance measurements <br /> Temperature trtemurenients wall be performed ustng&andard thermorrwers a>egwval=t temperature <br /> teeters Combination instruments capable of measuring twee or all three of the parameters may also be <br /> used <br /> All instrutrtcnts will be calibrated to accordance with manufacturer's recommendations 'The values for <br /> cooductivi* standards and pH buffers used m calibration will be recorded in a field notebook All probes <br /> u-tll be thcrou¢hly cleaned and nnsrd with fresh water prior to any measurements, in accordance with <br /> Secuoc C 1 <br /> D SA_NIPLE CUSTODY <br /> This section describes standard operating procedures for sa--nple custody and custody dccusentation <br /> Sample custody procedures will be followed through sample collection, transfer, analysis, and ultimate <br /> disposal The purpose of these procedures is to assure that (1) the tntegrty of samples is mamtataed <br /> during their coalecuon, transportation, and storage prior to analysis and (2) past-analysts sample material <br /> is properly disposed cf Sanple custody is divided into field procedures and laboratory procedures, as <br /> descn-bed below <br /> D 1 Feld Custody Procedures <br /> Sample quantifies, 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 responsible for the care <br /> and custody of ire collected samples until they are properly transferred <br /> D 1 1 Field Documentation <br /> i <br /> Each sample will be labeled and sealed properly tnitnediawly after collecuon Sample identification <br /> documents will be careful:y prepared so that identification a.-td chain-of-custody records can be maintained <br /> and sample disposition can be controlled Forms will be filled out with waterproof title The follow-ng <br /> sample ideattficanon documents will be u.t'ized <br /> • Sample labels <br /> • Field notebook <br /> • Chain-of-custody forms <br />