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Angela Bellantoni <br /> September 21,2021 <br /> Page 10of10 <br /> safety incorporated into the analysis. The minimum acceptable safety factors will be subject to approval by the <br /> Office,on a case-by-case basis, depending upon the degree of certainty of soil or rock strength determinations <br /> utilized in the stability analysis, depending upon the consequences associated with a potential failure,and <br /> depending upon the potential for seismic activity at each site. <br /> (4)At sites where blasting is part of the proposed mining or reclamation plan,the Applicant shall demonstrate <br /> through appropriate blasting,vibration, ,geotechnical, and structural engineering analyses, that off-site areas will <br /> not be adversely affected by blasting. <br /> • Please fully address the requirements of Rule 6.5.4 as listed above. <br /> Additional Information: You will also need to provide the Division with proof of notice publication as well as <br /> proof of notice to surrounding property owners within 200' of the permit. Any letters from other commenting <br /> agencies/entities received by the Division to-date have been included with this correspondence for you to review. <br /> This concludes the Division's preliminary adequacy review of this application. This letter shall not be construed <br /> to mean that there are no other technical deficiencies in your application. Other issues may arise as additional <br /> information is supplied. Please remember that the decision date for this amendment application is December 7, <br /> 2021. As previously mentioned,if you are unable to provide satisfactory responses to any inadequacies prior to <br /> this date,it will be your responsibility to request an extension of time to allow for continued review of this <br /> application. If there are still unresolved issues when the decision date arrives and no extension has been <br /> requested,the application will be denied. If you have any questions,please contact me at(303)229-9414. <br /> Sincerely, <br /> Eric Scott—Environmental Protection Specialist <br /> CC: <br /> Enclosures: State Engineer's Office Comment Letter dated Sept 20,2021 <br /> History Colorado Comment Letter <br />