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o Corrective Action. If quality control audits of data result in <br /> detection of unacceptable data, the individual in charge of the <br /> specific investigation will be responsible for developing and <br /> initiating corrective action. Corrective action for field <br /> measurements may include: <br /> - Repeat the measurement to check the error. <br /> - Check for all proper adjustments for ambient conditions <br /> such as temperature. <br /> - Check the batteries (if any) of instrument or measurement <br /> device. <br /> - Check the calibration of instrument or measurement device. <br /> - Replace the instrument or measurement devices. <br /> Corrective action for sampling procedures may include: <br /> - Evaluating and amending sampling procedures. <br /> - Reanalyzing samples if holding time criteria permits. <br /> - Resampling and analyzing. <br /> - Evaluating and amending sampling and analytical procedures. <br /> - Accepting data and acknowledging level of uncertainty. <br /> 4.3.2.2 Laboratory Activities. Once the samples are received at the <br /> contract laboratories under custody procedures, the responsibility for <br /> producing credible sample data will shift to the laboratory personnel. The <br /> involvement of the field investigation staff in the laboratory analytical <br /> quality control will be one of overview to insure that acceptable <br /> procedures are being utilized and that the data being reported is within <br /> reasonable limits of acceptability. This overview function will consist of <br /> the following: <br /> o Selection of certified laboratories acceptable to the regulatory <br /> agencies. <br /> o Review of proposed analytical procedures to ensure they comply with <br /> the CAM documents. <br /> o Periodic review of the laboratories' internal QC data to verify <br /> that acceptable precision and accuracy envelopes are being <br /> maintained around the MCTC data base. <br /> o Review of all sample data generated by the contract laboratories as <br /> to "apparent" reliability and to minimize data reporting errors <br /> that might otherwise appear as erroneous data. <br /> As mentioned in Section 8.1, the selected laboratories will be <br /> certified by the State of California DOHS' Hazardous Materials Laboratory. <br /> A-2 <br />