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<br /> TABLE 19 <br /> CYPRUS YAMPA VALLEY COAL CORP <br /> SUMMARY OF WATER QUALITY DATA <br /> STATION NUMBER: OBAV2 --- OOB-AV-2 <br />Average Std Maximum Minimum Units Coun[ Period <br />PHYSICAL PAO PERTIES <br />TEMPERATURE FIELD 10. 16] 5.0 18. 000 3. 000 llEGREES C 12 10/92 - 09/93 <br />CONDUCTIVITY FIELD 1582. 500 222.3 1800. 000 1020. 000 Uh43OS/CM 12 10/92 - 09/97 <br /> LAB 1592. 500 12].6 1800. CG0 1490. GG0 LMdOS/CM 9 12/92 - 08/93 <br />PH FIELD ]. 608 0.4 8. 300 ]. 100 PH 12 10/92 - 09/93 <br />ALKALINITY TOTAL 310. 000 20.8 328. 000 280. 000 MG/L 9 12/92 - 08/93 <br />HARDNESS TOTAL 899. 750 53.3 920. 000 806. 000 MG/:. 9 12/92 - OB/93 <br />SOLIDS DISSOLVED 1719. 500 51.5 1368. 000 12]9. 000 MG/I. 4 12/92 - 08/93 <br />CATIONS <br />CALCIUM DISSOLVED 202 .250 13.9 222. 000 192 000 MG/L 9 12/92 - 08/93 <br />MAGNESIUM DISSOLVED 82 .]50 4.5 89. 000 ]9 .000 M.G/l. 4 12/92 - 08/93 <br />SODIUM DISSOLVED 85 .]50 3.9 90. 000 83 .000 MG/I. 9 12/92 - Ob/53 <br />AN1ON5 <br />BICAFBONATE AS HCO3 365 .000 46.] 900. 000 312 .000 MG/I. 3 03/53 - 08/93 <br />CARBONATE AS CO3 4 667 8 1 19. 000 0 .000 MG/L 3 03/93 - 08/93 <br />SULFATE NOT APPLICABLE 729 .000 47.] no .DOO 659 000 MG/I. 9 12/52 - 08/93 <br />PRIMARY <br />CADMIUM DISSOLVED -0 100 0.0 -0. 100 -0. 100 UG/L 9 12/92 - 08/93 <br />LEAD DISSOLVED -20. 000 0.0 -20. 000 -20. 000 UG/1. 4 12/92 - OB /53 <br />MERCURY DISSOLVED -0. 125 0.1 -0. 100 -0. 200 UG/L 4 12/92 - 08/93 <br />SELENIUM DISSOLVED -1. 000 0.0 -1. 000 -1. 000 UG/L 9 12/92 - OB/93 <br />Report Da Ce: 10-JUN-99 Page: 1 of 2 <br />Repot[ Name: WQA020R <br />