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anticipated to measure the highest peak particle velocities achieved during blaarinpv. Based on <br />the estimated distance to the nearest residence east of the site (approximately 3650 ft) and <br />accessibility for regular monitoring of the blasts, it is rrot planned to locate a seismograph east <br />of the site at this time. In addition, the scaled distance formula calculation provides <br />unrealis[icalty high allowable maximum charge per delay at this distance. <br />Additionally, the Quary, per DMG regnirements, will keep records of each blast for a <br />minimum of 3 years and these records will be available for inspection by the DMG on demand <br />These records shall contain at a minimum items #1 through #16 as provided in the DMG letter, <br />It has been a pleasure serving you on this project. Please contact the undersigned if you have <br />arty questions or commends. <br />Sincerely yours, <br />LYMAN HENN INC. <br />Raymond W. Hemr, PhD., P.G. <br />Principal <br />Attachments <br />,w~-nco~owrto>ECrs,osowoa nuw,rt Qmvycmv,mimviu <br />RepotlN.Rle~ 9-14-0S.do[ <br />11016'" Street, Suite 900 -Denver, CO 80202-5202 -Tel: 303.534.1100 -Fax: 303.534.1777 - www.LVmanHenn.com <br />Geotechnical, Tunneling, and Construction Services <br />