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Apri122, 1999 • • Page 25 <br />This corrective action sequence will be followed forall water quality parameters. Detection <br />of elevated BTX or oil and grease concentrations in the process stream (Section 5. l) that exceed the <br />baseline concentrations (established d uringthe fi ve-quarter baseline monitoring period) by ] 000 mg/1 <br />(0.1%) would signal the potential for destructive distillation of oil shale. If data 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 C/range iu Hydroslalic Pressure a!llre Dissoh~lian Surjnce <br />The hydrostatic pressure at the Dissolution Surface will be reviewed as data are acquired. <br />Once the ambient data has been assembled, numeric protection levels and `practice-based' permit <br />conditions will be established by the BLM and American Soda. Significant deviations from the <br />established baseline, that cannot be attributed to ambient or external conditions, will be cause to <br />initiate corrective action procedures. The following sequence of corrective action procedures will <br />be initiated. <br />1. Notify the BLM and the EPA, within the next BLM working day, that the corrective <br />action sequence of procedures for change in hydrostatic pressure at the Dissolution <br />Surface has been implemented. <br />2. Evaluate the integrity of the pressure transducer. <br />3. Evaluate other Dissolution Surface hydrostatic monitoring systems. <br />4. Evaluate the mass balance of the production wells in the area. <br />5. Discontinue injection into the solution mining well and balance the density of the <br />fluids in the well. <br />6. Pressure test all tubing, strings, and annular areas between well strings with nitrogen <br />gas to hydrostatic pressure to ensure the mechanical integrity of the tubing. <br />7. Perform a temperature log to determine if there is any significant temperature change <br />above the nahcolite-bearing zone. <br />8. Evaluate the results from these procedures to determine the best solution for <br />correcting the problem. The use of additional logging techniques may be required <br />to accurately pinpoint any mechanical failures. <br />9. Notify the BLM and EPA of the results of the evaluation and the proposed corrective <br />actions to be taken. <br />Agapito Associates, Inc. <br />