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PAGE 1 <br />i~ <br />June 20, 1991 <br />Permittee: Peabody Coal Co. <br />Drawer "D" <br />Hayden, CO 81639 <br />(303)276-3707 <br />Mine: Seneca II <br />Colorado Permit No. C-80-005 <br />Inspection Type: Complete/Oversight <br />Participants: Chuck McCulloh, Peabody; Carl Mount, MLRD; Russ Porter <br />and Jeff Zingo, OSM <br />Records Review <br />This was a joint (OSM-NERD) inspection of the Seneca II inspectable <br />unit, including all of the associated records and disturbed areas. <br />The records review resulted in the following findings: <br />- Auger area "E" has received a varience from contemporaneous <br />reclamation to allow Peabody to face-up the highwall and construct a <br />portal for an underground mine in 3 to 4 years. The permit was <br />reviewed, (volume 410, page 12 and volume 612, pages 13-33) and the <br />area was inspected in the field. <br />- The NPDES permit No.0000221 and records were reviewed. The NPDES <br />permit expired on 3/31/91. Peabody has applied to the Colorado <br />Department of Health (CDH) for a new permit. A letter from the CDH, <br />dated 3/29/91, extends the old NPDES until a new one is issued. <br />During the field inspection a water sample was taken from pond no.003 <br />(shop runoff). The sample was split with the Peabody hydrologist, and <br />is being analyzed for the following parameters: total iron, total <br />disolved solids (Specific Conductance was checked by the permittee <br />and found to be 2980umhoa with the temperature corrected to 25C), <br />total suspended solids, pH (field pH was also checked by the <br />permittee and was 8.31), oil 6 grease, total acidity, and total <br />alkalinity. The field measurement for temperature was also conducted <br />by Peabody personnel and found to be 21.7C. Sample results are not <br />yet available. <br />A potential problem may develop with increasing TDS levels at the <br />Seneca mine. For example, TDS levels from pond No .4 were in the 500- <br />600 range in 1982 and were trending up to the 2000-3000 range in <br />1990; the TDS levels from pond No.B were in the 300-400 range in 1986 <br />and are also trending up to the 900-1100 range in 1990. These TDS <br />levels were noticed while conducting a review of Peabody's surface <br />water monitoring records to assure that monitoring is being <br />