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<br />December 2, 1998 <br />Ms. Erica Crosby <br />• III IIIIIIIIIIIIIIII • <br />~ `9~ <br />CONSTRUCTION, INC. <br />1225 South 7th Street <br />Grand Junction, Colorado 81501 <br />(970)242-5370• FAX:(970)245-7716 <br />Division of Minerals & Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: M-08-085, VAGNEUR GRAVEL PIT <br />Dear Ms. Crosby: <br />RECEIVED <br />DEC 0'7 1998 <br />~~w~s~cn of Minerals & Geology <br />In response to your Inspection Report dated August 8, 1998, the following is provided for <br />your consideration. <br />1. Enclosed you will find a copy of the Operation and Rehabilitation Plans that <br />were submitted to the division as part of our 1992 Technical Revision. Also <br />enclosed are copies of correspondence between the division, and Elam <br />Construction, Inc., which indicate that the Technical Revision was accepted. <br />We have included the bond calculations used in 1992 indicating that the <br />$105,000 is adequate. In light of the accompanying documentation, we feel <br />that an amendment to our application is not warranted at this time. <br />2. As requested in your report, we have conducted an investigation to determine <br />whether or not ground and surface water was contaminated as a result of oil <br />spillage at the asphalt plant. Our investigations revealed that the spills you <br />noted in your report were from the loading process for AC-]0, Liquid Asphalt <br />Cement. AC-10 is a key ingredient in the production of asphalt pavement. Tt <br />is delivered to the asphalt plant in a heated state and stored in a heated tank <br />until used in the production process. When AC-10 cools to below 120 degrees <br />F., it becomes solid. Because of the nature of the product, it only affects the <br />top 1 inch of the soil. Page 7 of the enclosed Material Safety Data Sheet <br />(MSDS) indicates that AC-10 is not considered a hazardous waste by Federal <br />regulations. Page 4 of the MSDS explains the process wthat we follow for the <br />disposal of any spilled material together with the top layer of soil beneath the <br />spill. The area where you identified the spilled material is at a location where <br />it will be excavated an additional 60 to 80 feet as part of the future mining <br />efforts. Exploration activities conducted in the past have shown that the <br />