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_ <br /> Combustible Gas/Ox en- Combustible gas/oxygen meter <br /> calibration: Factory calibrated, field calibated monthly, <br /> r <br /> to manufacturers instructions. <br /> zeroed daily according <br /> Miscellaneous Measurin Devices Calibration procedures for <br /> any other measuring devfcauthority. <br /> d ll be documented at the <br /> request of the regulatory <br /> All equipment will be checked daily and replaced as <br /> necessary. Instrument manuals and an instrument log book <br /> will accompany equipment into the field. Any calibration, <br /> repairs or related information will be recorded in the log <br /> book. <br /> g•p Laboratory QA/QC Plan <br /> itted <br /> a state <br /> Soil and groundwater samples will be for chemical o analysis <br /> Certified Hazardous Taste Laboratory procedures for <br /> of hazardous constituents. Established QAIQC p <br /> analytical operations will include samplana <br /> lysis o y <br /> standards of analytical accuracy, <br /> procedures, data reduction, <br /> matrix spikes and method blanks' and maintenance of <br /> verification of raw analytical data, erformance. These <br /> conrtol charts to monitor analytical p <br /> ontprocedures are outlined in the laboratory QA/QC Plan <br /> QA/which is available upon request. Organic chemical analyses <br /> will be performed in conformance with standard procedures <br /> established by the United States Environmental Protection <br /> Agency (EPA) in "Guidelines Establishing Test Procedures for <br /> the Analysis of Pollutants Under the Clean <br /> Water Act"laboYdtory (is <br /> CFR Part 13fi, October 19$4) • performance audits <br /> periodically evaluated through extern Lab . The Specific <br /> conducted by EPA and DHS using QC eable and <br /> analytical methods to be utilized for pur 9 <br /> semivolatile hydrocarbons analyses are shown on Table 2. <br /> Provided the data base is of sufficient size, statistic-p+1 <br /> techniques may be employed for data validation. <br /> 9,0 Groundwater Monitoring Protocol <br /> Monitoring of depth to water and free product thickness <br /> within wells at the site will be conducted using an <br /> Interface Probe or conductivity meter. For consistency, all <br /> measurements will be taken from the northside <br /> potential <br /> wellhead at the survey mark. <br /> sediments, total well depth <br /> infiltration of fine grained <br /> will also be sounded. <br />