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.~ <br />~'` III I I IIIIIIII <br />DEPARTMENT OF NATURAL RESOURCES <br />D Monte Paacoe. E.ecuiwe Dueaor <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SMELTON Director <br />Richard D Lamm <br />G ove mor <br />MEMORANDUM <br />June 18, 1982 <br />To: Brian Munson <br />From: David Craig ~~~ <br />Re: Hydrologic Ponitoring - Northern Coal Company <br />_ -~ <br />Pursuant to your request, I have reviewed the hydrologic monitoring plan proposed <br />by the Northern Coal Company in their letter of March 31, 1982. Generally, I <br />agree with the reasoning behind the proposal. However, I suggest that the plan <br />be modified as is outlined in the tables to Follow. The suggested changes should <br />make the plan both less expensive and more effective. However, should operations <br />at the mine increase in the future, the monitoring plan will have to be adjusted <br />accordingly. <br />TABLE 1. GROUND-WATER MONITORING <br /> Proposal of Northern's Letter <br />Strata Well of March 31, 1982 <br />Monitored Number Levels Sampling <br />G seam HRG-1 M - <br />" HRG-2 M - <br />" 79-08 Q - <br /> 79-11 Q A <br />J seam HRJ-1 M - <br />P seam HRP-lA M - <br />FF seam HFC-10 Q A <br />" HFC-2 Q - <br /> HFC-3 Q - <br />" HFC-4A Q - <br />" HFC-5 Q - <br />My Suggested Monitoring Plan <br />Levels Sampling <br /> <br />M Q-field <br />M Q-field <br />Q - <br />Q - <br />Q Q-field <br />Q Q-field <br />Q Q-Field <br />Q Q-field <br />Q - <br />Q - <br />Q - <br />423 Centennial Budding. 1313 Sherman Street Denver. Colorado 80203 Tei (3031 866-356 <br />