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RPR-08-1999 10 42 RGRPITO RSSOCIRTES 970 245 9234 P.07 <br />Draft: April 7, 1999 Puge S <br />A general evaluation of data quality will consider potential sources of error, includin~ gross <br />errors, systematic errors, and random errors. The percent difference between duplicate samples and <br />the analytical results from any blank samples will be evaluated. <br />6.9 Corrective Action <br />Corrective action indicators have been developed for deviations from established water <br />quality data, process monitoring, and hydrostatic pressure monitoring. The corrective action criteria <br />for such deviations are presented in this section. <br />6.9.1 Water Quality Data <br />Water quality data will be updated as each data point is acquired. The environmental <br />coordinator will review these data at each update. Data points that aze greater thaw three standazd <br />deviations from the established baseline (initially) and established treads (as acquired) require <br />corrective action measures. Lz the event that corrective action is indicated, the following sequence <br />of procedures will be initiated. <br />1. The sample(s) will be submitted for re-analysis to till reporting laboratories. <br />2. Samples will be recollected and submitted for analysis to till reportinK laboratories. <br />3. Ijthe preceding two corrective action iterns (Nos. 1 and 2) fail to yield reproducible <br />results, the data will be invalidated. <br />In the event that a sample was lost or destroyed, items 2 and 3 of the coaective: action <br />sequence would be initiated. <br />This corrective action sequence will be followed for all water quality parameters. Detection <br />of elevated BTX or oil and grease concentrations in the process stream that exceed the baseline <br />concentrations (established during the five quarterbaseline monitoring period) by 1000 mg/I (0.1 %) <br />would signal the potential for destructive distillation of oil shale. if dares excursions of this <br />magnitude or greater are detected, the cavity temperature will be reduced to 300°F until it is evident <br />that distillation of oil shale is no longer occurring. <br />6.9.2 Change in Hydrostatic Pressure ar the Dissolutiot Surface <br />The hydrostatic pressure at the Dissolution Surface will be reviewed as data aze acquired. <br />Excursions greater than three standard deviations from the established baseline, that cannot be <br />Agapito Associates, Inc. <br />