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VME-NitroConsult Inc. <br /> <br />~.J <br />February 16, 1y81 <br />Mr. LS K Chen <br />GE;C Minerals, Inc. <br />P.O. Box 225 <br />Florence, Colorado 81226 <br />Dear Li: <br />RcCE1VED <br />FEQ 17 1~.:' <br />MINEU LAND RECLAMATION; COAL' <br />COLO. DEPT. Of NATURAL RESO::RCES <br />Enclosed is our second report to you wtTich considers all of your monitored <br />blasts through February 11, 1981. 'I4te total is 14 in number. <br />A regression analysis has been made, and the results discussed in the report- <br />along with our recortmendations for future blasts. 'I1vo new curves have been <br />preparnd based on all 14 blasts, <br />,It is recat¢rended that you start using irrnediately the curves to desipL your <br />blasts. It is also recolrmended that you continue to monitor all such blasts <br />using your rented seisTrograph. <br />It is apparent from the report that you may increase your charge per delay <br />without exceeding the limit of 1 inch per second on ttie Dorchester Mine <br />Prope1'ty • - <br />Very tru]y yours, <br />. ` ~' 1 <br />~: ~ i <br />. .~'{ ++ ~l ~ t. <br />v.. <br />~J <br />James H. Gresh, P.E. <br />Western Regional Et~i.neer <br />JHG/va <br />enclosure <br />P.S. ZYTis second report revises and up-dates the contents of the first <br />report-as such, Report p2 Ss to be used for your blast desigL. <br />8295 Ralston Road, Suite 300 <br />Arvada, Colorado 80002 ~ Telephone 303-422-9094 <br />• A Mempnr of Ibr Nino Nobel Group <br />