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r <br /> . Smith Technology Corporation <br /> Quality Assurance/Quality Control Plan <br /> Revised February 1995 <br /> OrSanic Vapors <br /> Photoionization Detector (PID) Calibration daily field cahbration using a isobutylene <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 daily <br /> field calibration according to manufacturers instructions <br /> Electncal Conductivity <br /> Electrical Conductivity meter Calibration factory-calibrated annually and periodically <br /> calibrated against laboratory prepared standard calibration solution <br /> Water Temperature <br /> Mercury or digital thermometers Calibration factory calibrated once <br /> Combustible Gas/Oxygen <br /> Combustible gas/oxygen meter Calibration factory calibrated, field calibrated monthly, zeroed <br /> daily according to manufacturers instructions <br /> Miscellaneous Measurinz Devices <br /> Calibration procedures for any other measuring device used vAll be documented at the request <br /> of the regulatory authority <br /> W IAdmmlShells\QAQC-97 DOC <br />