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2801 Youngfield Street, Suite 171 <br />Golden, CO 80401 <br />athiesn" 303456-5638 <br />Toll Free 888-456-5638 <br />Inning Fax 303-456-5639 <br />' <br />41(V1 CnnsultaRits* Inic- www.mathesonmining.com <br />November 30, 2007 <br />Mr. Joe Lamanna <br />Quarry Manager <br />Holcim Us Inc. <br />' Portland Plant Quarry <br />3500 Highway 120 <br />Florence, CO 81226 <br />Re: Preblast Survey, Water Well Sampling and Vibration Monitoring Services Proposal <br />for the Holcim US Inc. Coaldale Quarry. <br />Dear Mr. Lamanna: <br />Matheson Mining Consultants, Inc. (MMC) is pleased to provide Holcim US Inc. (Holcim) with <br />a proposal for preblast surveys, water well sampling and vibration monitoring services for the <br />Coaldale Quarry currently under permit #M1977247 by the Colorado Division of Reclamation <br />' Mining and Safety (DRMS). <br />MMC possesses the qualifications required for the preblast surveys required by 30 CFR 816.62 <br />Use of explosives: Preblasting survey (Appendix 11I). MMC is also qualified to conduct <br />vibration monitoring according to 30 CFR 816.67 Use of explosives: Control of Adverse Effects <br />(Appendix III) Additionally MMC will conduct water sampling at all accessible residential <br />wells located on properties associated with the preblast surveys. MMC qualifications are <br />' detailed in Appendix I of this report. ACZ Laboratories in Steamboat Springs, Colorado will <br />conduct all subsequent laboratory analysis of water samples collected by MMC. ACZ <br />Laboratories qualifications and certifications are listed in Appendix II. <br />Method <br />MMC will examine the all accessible areas of the occupied structures listed in Appendix IV. <br />Copies of the inspection reports will be given to the DRMS and to the property owners. <br />The inspection report is based on an examination of only those portions of the premises readily <br />accessible for visual inspection. No inspection will be performed in areas that are obstructed, <br />concealed, or closed off. No inspection will be performed in areas that required the dismantling, <br />removal, or movement of any object including, but not limited to: roof, wall, floor and ceiling <br />coverings, furniture and appliances. <br />The condition of the premises may change after the dates of inspection due to factors such as <br />' weather, fire, moisture, leaks, and action taken by the owner or others, or the passage of time. <br />The inspection report will describe the condition of the premises at the time of inspection, and <br />