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iQA/QC Procedures <br /> Instrument calibration Equipment used to monitor groundwater parameters was calibrated <br /> prior to beginning purging at the site Monrtonng equipment was calibrated following the <br /> manufactures instructions using laboratory grade standards <br /> Equipment Decontamination Non-disposable and non-dedicated sampling equipment was <br /> cleaned pnor to use and between uses in each well Downhole equipment was cleaned by washing <br /> the equipment using a non-phosphate soap solution and rinsing the equipment twice with distilled <br /> water <br /> Duplicate One duplicate sample was collected from the site from a randomly selected <br /> monrtonng well The duplicate sample was collected at the same tune as the original sample and was <br /> treated in the same manner as the ongnnal sample The duplicate sample was submitted to the <br /> laboratory for TPHg and BTEX analysis <br /> Trip Blank A trip blank was prepared by the analytical laboratory and accompanied the <br /> sample bottles throughout the shipping and sampling events The trip blank was submitted to the <br /> laboratory for TPHg and BTEX analysis <br /> Field Blank One field blank was collected in the field by the field technician The field blank <br /> . was prepared, prior to sampling, by filling three 40-m1 VOAs with distilled water The field blank <br /> was submitted to the laboratory for TPHg and BTEX analysis <br />