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RESNA Industries Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised November 1992 <br /> 7.0 FIELD EQUIPMENT CALIBRATION AND MAINTENANCE <br /> The following measuring equipment may be used during the Remedial Investigation. Equipment <br /> is grouped by field activity. Calibration procedures and frequency are listed by piece. <br /> Soil Borings and Well Dimensions <br /> Steel and coated cloth tape. Calibration: none. <br /> Water Level Measurements in Wells <br /> Steel surveyors tape. Calibration: manufacturer supplied temperature correction will be <br /> applied as applicable for field conditions. Electrical well sounders. Calibration: check <br /> against steel surveyor's tape. <br /> Organic Vapors <br /> Photoioniza.tion Detector (PID). Calibration: daily field calibration using a isobutylene <br /> standard as per manufacturers instructions. <br /> Groundwater RH Measurement <br /> Digital pH meter. Calibration: standard pH solutions of 4, 7, and 10 will be utilized for <br /> daily field calibration according to manufacturers instructions. <br /> Electrical Conductivity <br /> Electrical Conductivity meter. Calibration: factory-calibrated annually and periodically <br /> calibrated against laboratory prepared standard calibration solution. <br /> WatgrT <br /> Mercury or digital thermometers. Calibration: factory calibrated once. <br /> QAQC1092.FWL 5 <br />