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Smith Environmental Technologies Corporation <br />Quality Assurance/Quality Control Plan <br />Revised February 1995 <br />Organic Vapors <br />Photoionization Detector (PID). Calibration: daily field calibration 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 />Electrical 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 Measuring Devices <br />Calibration procedures for any other measuring device used will be documented at the request <br />of the regulatory authority. <br />m:\..\shells\QAQC-95. W P5 <br />6 <br />• <br />SIIIITH <br />