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BLUE MOUNTAIN MINERALS BLUE MOUNTAIN MINERALS <br /> R O. Box 430 <br /> WColumbia, California 95310-0430 Carey Haughy <br /> 209/533-0127 Vice President Geology/Quality Control <br /> FAX 532-0972 <br /> P.O.Box 430,Columbia,California 95310 <br /> 209/533-0127 Ext.23 FAX#209/532-0972 <br /> e mail:carey@mlode.com <br /> February 1, 2001 <br /> Mr. Steve Wong <br /> U.S. Intec, Inc. <br /> 3301 North Navone Road <br /> Stockton, CA 95205 <br /> Dear Mr. Wong, <br /> I am responding to your inquiries regarding the nature of the limestone filler <br /> product that we supply to your company. All of the finished products at <br /> Blue Mountain Minerals consist of crushed and ground, naturally occurring <br /> carbonate rocks. The natural rock, commonly referred to as limestone, <br /> consists predominately of the minerals calcite (CaCO3) and dolomite <br /> (CaMgC206). Attached is a typical chemical analysis. <br /> Being a natural carbonate rock, the pH ranges from 8 to 9, and the specific <br /> gravity is around 2.6 to 2.8. The product is non-combustible and has a low <br /> solubility, of around 0.035 grams per liter at 100 degrees Celsius. The <br /> crushed rock is considered chemically stable. <br /> I hope this provides you with the information you need. Please do not <br /> hesitate to call if I can be of further assistance. <br /> Sincerely, <br /> Care au y <br /> Vi a7 <br /> Presi ology & Quality Control <br />