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3. Blasting <br />The Operator will install a frequency responsive seismograph at the Slack-Central City Sanitation District <br />(District) Waste Water Treatment Plant. The seismograph will be installed at a location to be approved by the <br />Division of Minerals and Geology (DMG), in cooperation with the District. The seismograph will monitor each <br />quarry development and production blast. Seismograph records must be retained for at least 3 years and be <br />available for inspection by the DMG on demand. Continued access to the Waste Water Treatment Plant by the <br />Operator is necessary for compliance with this permit condition; if the owner(s) of the Plant deny the Operator's <br />access at any reasonable time for the purpose of seismograph monitoring, the requirement to comply with this <br />permit condition shall be re-evaluated by the Division through submittal of a technical revision by the Operator <br />MINED LAND RECLAMATION BOARD <br />COLORADO DEPARTMENT OF NATURAL RESOURCES <br />(//~~ <br />RONALD W. CATTANY <br />Division Director <br />