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RESNA Industries Inc. <br /> �ilCSI� <br /> r Quality Assurance/Quality Control Pian <br /> Revised November 1992 <br /> 7.0 FIELD EQUIPMENT CALIBRATION AND MAINTENANCE <br /> i <br /> The following measuring equipment may be used during the Remedial Investigation. Equipment <br /> 1 is grouped by field activity. Calibration procedures and frequency are Iisted by piece. <br /> j oil 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 /> w� <br /> Photoionization Detector (PID). Calibration: daily field calibration using a isobutylene <br /> ^� standard as per manufacturers instructions. <br /> f <br /> --- Groundwater pH Measurement <br /> Digital pH meter. Calibration: standard pH solutions of 4, 7, and 10 will be utiliztd for <br /> daily field calibration according-to manufacturers instructions. _ <br /> Electrical Conductivity <br /> =rElectrical Conductivity meter. Calibration: factory-calibrated annually andperiodically <br /> r calibrated against laboratory prepared standard calibration solution. <br /> i <br /> Water T m t <br /> _ i <br /> Mercury or digital thermometers. Calibration: factory calibrated once. <br /> r QAQCIM.FNL 5 <br />