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Peabody <br />•BTU Empire Corporation <br />n <br />Water Ouality SamolinQ: <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />9. DMRs: The former owner, RAG, took away our oracle database (indicating it was proprietary) <br />when Peabody acquired Empire in 2004. Development of a new database was initiated, <br />however, data normally entered by Empire personnel and the laboratory during the year had to be <br />hand-entered into tables in order to meet the 2004 AHR deadline. Discrepancies appear to be <br />entry errors and carry-overs from earlier reports by multiple people working on this. Also, DMR <br />reporting requires weekly insitu readings for pH, in which we utilize a pH meter in the field. <br />However, several laboratory samples were collected in 2004 which included pH measurements. <br />Apparently some of these laboratory measurements were included during data entry in the DMR <br />reporting. In reviewing the field notes and laboratory data I have made the following updates: <br />a. No. 5 Mine Discharge <br />i. ls` Qtr -min/max pH is actually 7.28 - 7.91. 8.08 was a laboratory reading. (Table 7 <br />and DMR attached). Some conductivities were also corrected on Table 7. <br />ii. 2"d Qtr -minimum pH was actually 6.89 in second quarter on 4/11/04. Data entry for <br />pH appears to be off by two rows. 2.65 cfs appears to be a data entry error. (Table 7 <br />attached). <br />iii. 3`d Qtr -maximum pH was 7.74. 7.83 on 7/29/04 is a data entry error and should <br />have read 7.73. Similarly, the entry of 7.78 on 8/5/04 should have read 7.68. (Table 7 <br />attached). <br />iv. 4`h Qtr -the pH low [hat quarter was 7.53 as shown in the AHR (6.68 value might be a <br />carry-over). (DMR attached). <br />b. No. 1 Strip Pit <br />i. ls` Qtr -The minimum insitu reading for the quarter was actually 7.9. 7.85 was a <br />laboratory reading. The maximum and 30 day avg. iron values were 0.570 ug/1 <br />instead of 0.530 ug/1. (DMR and Table 15 attached). <br />ii. 2"d Qtr -The DMR flow appears to be a miscalculation. The daily max should have <br />been 0.008 MGD. (DMR attached). <br />Groundwater/Mine WaterMonitorine: <br />10. The 6244 datum is correct. Table 5 has been updated accordingly. Note that Figure 8 had <br />utilized data from an oracle database with an imbedded calculator using the correct datum, and <br />therefore did not need to be corrected. <br /> <br />