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Golder Associates Inc. <br />44 Union Boulevard, Suite 300 <br />Lakewood, CO USA 80228 <br />Telephone (303) 980 -0540 <br />Fax (303) 985 -2080 RECEIVED <br />AUG 2 3 1999 <br />August 18, 1999 <br />Division of Mineraf5 & Geology <br />AmerAlia, Inc. <br />P.O. Box 1330 <br />Rifle, Colorado 81650 <br />Attention: Mr. Roger Day Vice President <br />RE: TRANSMITTAL OF ROCK SCHOOL LEASE EXPERIMENTAL NAHCOLITE MINE <br />QUALITATIVE ENVIRONMENTAL RISK ASSESSMENT <br />Dear Mr. Day: <br />Golder Associates Inc. (Golder) is pleased to present the attached memorandum describing the results of <br />our qualitative environmental risk assessment. Golder was retained to perform a comprehensive review of <br />the proposed Rock School Lease Experimental Nahcolite Mine operation plan, monitoring plan, and <br />reclamation permit application. This review was conducted to determine the adequacy of the design for <br />environmental protection and evaluate the potential environmental impacts associated with implementation <br />of the design. <br />The review methodology consisted of standard qualitative risk assessment protocols. We reviewed all <br />aspects of the project and their potential environmental consequence and overall risk to soil, groundwater, <br />surface water, subsidence, and wildlife. Based on our review we found that most aspects of the design and <br />proposed monitoring are adequate to reduce environmental risk to negligible levels. However, for a few of <br />the project elements we did identify a very low potential risk and have recommended additional mitigation <br />plans not previously developed in your existing document. We believe that development and incorporation <br />of these additional mitigation plans would reduce all environmental risks associated with the project to <br />negligible levels given the short operating life, low production rates, monitoring procedures, and operational <br />controls. <br />Should you have any questions or comments concerning this memorandum, please do not hesitate to <br />contact us at (303) 980 -0540. <br />Sincerely, <br />LDER ASSOCIATES INC. <br />Scott H. Miller T. William Thompson, Ph.D. <br />Associate Associate <br />Environmental Services Mining Group <br />SHM /pcj <br />Attachments <br />I. \99\2057\2057L 1. DOC <br />Our Ref: 993 -2057 <br />OFFICES IN AUSTRALIA, CANADA, GERMANY, HUNGARY, ITALY, SWEDEN, UNITED KINGDOM, UNITED STATES <br />