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David Berry - 2 - October 23, 1995 <br />the wells has increased as the mine has filled. The water in the <br />mine has no doubt flowed through the fractured B-Seam coal and has <br />likely been in contact with caved areas. The quality of water in <br />these two wells should be representative of the post mining water <br />quality in the B-Seam. PBR's Map E8-3286 presents the location of <br />these monitoring wells. <br />Geochemical data from the roof, coal and interburden of the B-Seam <br />indicates the presence of soluble calcium, magnesium and sodium <br />(ref. Bear permit page 2.04-24a and PBR permit page 2.05-20vi). <br />The Bear B-Seam floor coal has a soluble calcium, magnesium and <br />sodium content of 8, 3.6 and 95 mg/1 respectively. The Somerset B- <br />Seam coal has an average soluble calcium, magnesium and sodium <br />content of 2.1, 4.1 and 114 mg/1 respectively. This data shows the <br />relatively high soluble sodium content in the coal and also <br />presents a correlation between the coal from the north and south <br />sides of the river. Conductivity of the coal seams is also similar <br />with the PBR B-Seam having an average value of 0.60 mmhos/cm and <br />the Bear coal having a value of 0.53 mmhos/cm. <br />The total dissolved solids (TDS) content in a well provides a <br />fairly good indication of its water quality. The maximum recorded <br />TDS value for MCC's four B-Seam wells varies from 1000 to 4200 <br />mg/1. If well SOM-127-H is deleted from the data base, the maximum <br />TDS value for the three remaining B-Seam wells varies from 1000 to <br />2500 mg/1. <br />PBR's two monitoring wells, H-10 and B-6, have been monitored since <br />1986. The period of record reviewed for this report was from 1986 <br />through 1991. The maximum TDS value for the two B-Seam wells <br />varies from 4780 to 4890 mg/1. <br />The following table compares selected analytical data from the five <br />monitoring wells. The data clearly shows that the water in wells <br />H-10 and B-6 is of poorer quality than the water in MCC's <br />monitoring wells. <br /> MAXIMUM VALUES <br /> Alkalinity Magnesium Sodium TDS Iron <br />SOM-C-72-H 408 2 387 1006 0.31 <br />SOM-129-H 2950 3 1060 2530 0.94 <br />JMB-12 1335 21 606 1336 84.1 <br />H-10 (PBR) 2460 42 1780 4780 39.0 <br />B-6 (PBR) 2770 29 1920 4890 39.0 <br />