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SOP #: GW 0001 <br />Region I Low Stress <br />(Low Flow) SOP <br />Revision Number: 2 <br />Date: July 30, 1996 <br />Page 10 of 13 <br />Matrix spike duplicate. <br />Equipment blank. <br />Trip blank (VOCs) . <br />Temperature blank (one per sample cooler). <br />Equipment blank shall include the pump and the pump's tubing. If <br />tubing is dedicated to the well, the equipment blank will only <br />include the pump in subsequent sampling rounds. <br />Collect samples in order from wells with lowest contaminant <br />concentration to highest concentration. Collect equipment blanks <br />after sampling from contaminated wells and not after background <br />wells. <br />Field duplicates are collected to determine precision of sampling <br />procedure. For this procedure, collect duplicate for each analyte <br />group in consecutive order (VOC original, VOC duplicate, SVOC <br />original, SVOC duplicate, etc.). <br />If split samples are to be collected, collect split for each analyte <br />group in consecutive order (VOC original, VOC split, etc.). Split <br />sample should be as identical as possible to original sample. <br />All monitoring instrumentation shall be operated in accordance with <br />EPA analytical methods and manufacturer's operating instructions. <br />EPA analytical methods are listed in 40 CFR 136, 40 CFR 141, and SW- <br />846 with exception of Eh, for which the manufacturer's instructions <br />are to be followed. Instruments shall be calibrated at the beginning <br />of each day. If a measurement falls outside the calibration range, <br />the instrument should be re- calibrated so that all measurements fall <br />within the calibration range. At the end of each day, check <br />calibration to verify that instruments remained in calibration. <br />Temperature measuring equipment, thermometers and thermistors, need <br />not be calibrated to the above frequency. They should be checked for <br />accuracy prior to field use according to EPA Methods and the <br />manufacturer's instructions. <br />VII.FIELD LOGBOOK <br />A field log shall be kept to document all ground water field <br />monitoring activities (see attached example matrix), and record all <br />of the following: <br />Well identification. <br />Well depth, and measurement technique. <br />Static water level depth, date, time and measurement technique. <br />Presence and thickness of immiscible liquid (NAPL) layers and <br />