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C ' <br /> ' A-3 <br /> 2.0 DECONTAMINATION AND DISPOSAL PROCEDURES <br /> 2.1 Equipment Decontamination <br /> ' Sampling equipment was decontaminated as follows <br /> ' 1 Prior to individual sample collection, any sampling device was cleaned in a TSP <br /> solution and rinsed twice in clean water Any visible soil residue was removed <br /> ' 2 Water sampling containers were cleaned and prepared by the respective analytical <br /> laboratories <br /> ' 3 Field monitoring equipment (pH, conductivity, or temperature probes) was rinsed with <br /> clean water prior to use and between samples <br /> ' 3.0 FIELD MEASUREMENTS <br /> Field data were collected during various sampling and monitoring activities, this section <br /> describes routine procedures followed by personnel performing field measurements The <br /> ' methods presented below are intended to ensure that field measurements are consistent and <br /> reproducible when performed by various individuals <br />' 31 Conductivity, Temperature, and pH <br />' Specific conductance, water temperature, and pH measurements were made when a water sample <br /> was collected Regardless of the sample collection method, a representative water sample was <br /> placed in a transfer bottle used solely for field parameter determinations A conventional pH <br />' meter with a combination electrode or equivalent was used for field-specific conductance <br /> measurements Temperature measurements were performed using standard thermometers or <br /> equivalent temperature meters Combination instruments capable of measuring two or all three <br />' of the parameters may have also been used <br /> All instruments were calibrated in accordance with manufacturer methods The values for <br />' conductivity standards and pH buffers used in calibration were recorded daily in a field <br /> notebook All probes were thoroughly cleaned and rinsed with fresh water prior to any <br /> measurements, in accordance with Section 3 1 <br /> 1 <br />