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• Arc Associates Inc <br /> Quality Assuranez/Qualxty Contort Plan <br /> Revised 1998 <br /> Electrical Conductivi <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/Oxyeen <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 /> All equipment will be checked daily and replaced as necessary Instrument manuals and an instrument <br /> log book will accompany equipment into the field Any calibration, repairs or related mformation will <br /> be recorded in the log book <br /> 8.0 LABORATORY QA/QC PLAN <br /> Soil and groundwater samples will be submitted to a State Certified Hazardous Waste Laboratory for <br /> chemical analysis of hazardous constituents Established QA/QC procedures for analytical operations <br /> will include sample custody procedures, standards of analytical accuracy, analysis of matrix spikes and <br /> method blanks, data reduction, verification of raw analytical data, and maintenance of control charts to <br /> monitor analytical performance These QA/QC procedures are outlined in the laboratory QA/QC Plan <br /> which is available upon request Organic chemical analyses will be performed in conformance with <br />