Laserfiche WebLink
1 Draft: March 31, 1999 <br />1 <br />1 <br />1 <br />1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br />1 <br /> <br />1 <br />Page 21 <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 quarter baseline monitoring period) by 1000 mg/I (0.1 %) <br />would signal the potential for destructive distillation of oil shale. If data excursions of this <br />magnitude or greater aze 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 />6.8.2 Change in Hydrostatic Pressure at the Dissolution Surface <br />The hydrostatic pressure at the Dissolution Surface will be reviewed as data aze acquired. <br />Excursions greater than three standard deviations from established trends, that cannot be attributed <br />to ambient or external conditions, will be cause to initiate corrective action procedures. The <br />following sequence of corrective action procedures will be initiated. <br />1. Evaluate the integrity of the pressure transducer. <br />2. Evaluate other Dissolution Surface hydrostatic monitoring systems. <br />3. Evaluate the mass balance of the production wells in the area. <br />4. Discontinue injection into the solution mining well and balance the density of the <br />fluids in the well. <br />5. Pressure test all tubing, strings, and annular azeas between well strings with nitrogen <br />gas to hydrostatic pressure to ensure the mechanical integrity of the tubing. <br />6. Perform a temperature log to determine ifthere is any significant temperature change <br />above the nahcolite-bearing zone. <br />7. 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 />8. 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 />