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• WHITE RIVER NAHCOLITE MINERALS, LTD. LIABILITY COMPANY <br />1997 PROJECT STATUS AND ANNUAL PLAN OF DEVELOPMENT <br />1.0 INTRODUCTION AND PROJECT SUMMARY <br />This report summarizes 1997 process operations, shipment of product, reclamation status, <br />geotechnical and environmental monitoring results. Proposed operations for 1998 will be <br />described in this report, as well as status of all surface facilities and project wells. Significant <br />technical considerations and/or proposed changes in operations are presented. <br />• On July 1, 1971, the four sodium preference right leases were issued. During 1980-1982 <br />exploration, well drilling and environmental monitoring were conducted on the leased lands. A <br />bulk sampling operation was in operation from late 1983 to early 1984. The BLM evaluated a <br />125,000-TPY commercial-scale nahcolite mine in late 1986 and the Environmental Impact <br />Statement was approved in November of 1987. In 1988 an Underground Injection Control (UIC) <br />permit was obtained from the EPA. Early in 1990, NaTec Minerals, Inc. submitted construction <br />plans fora 125,000-TPY facility to the BLM and initiated site development. Construction of <br />plant facilities started in May of 1990 and was completed February of 1991. In January, 1991 <br />the revised Mine Plan was submitted, and approved by the BLM. Injection and sodium <br />bicarbonate production was initiated in February, 1991. An amendment (to update plan) was <br />• <br />