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RESNA Industries Inc <br /> Quality Assurance/Quality Control Plan <br /> Revised November 1993 <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 /> Photolonlzatlon Detector (PID) Calibration: dally field calibration using a lsobutylene <br /> ' standard as per manufacturers instructions. <br /> Groundwater pH 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 /> ' <br /> Water T <br /> Mercury or digital thermometers Calibration: factory calibrated once. <br /> QAQrtart FAIL 5 <br />