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TABLE 1. SUMMARY OF 2018 FIELD AND LABORATORY WATER QUALITY RESULTS <br /> GCC Rio Grande,Inc.-Pueblo <br /> Parameter CO State Std MW 6 Result MW-6 Result MW 6 Result MW-7 Result MW-7 Result MW-7 Result Min Detection Reporting Units lab Method <br /> (A Use) Limit limit <br /> Date 1/3/2018 4/27/2018 12/12/2018 1/3/2018 4/27J2018 12/12/2018 <br /> FIELD <br /> PH 6.5-8.5 6.95 7.20 7.39 6.86 6.85 t14. <br /> 0 - pH units <br /> Specific Conductance 4720 6200 6500 4765 5820 3 - u5 <br /> Temperature 14.0 16.3 14.9 15.0 15.0 0 deg C <br /> LABORATORY <br /> PH 6.5-8.5 NA 7.22 7AO 7.35 6.66 6.86 - pH units EPA 9040C <br /> Aluminum(d) 5600 636 NO NO 1350 NO ND 68 200 ug/L 6010C <br /> Arsenic(d) 100 NO NO NO 9.49(1) ND NO 5 30 ug/L 6010C <br /> Beryllium(d) 100 NO NO NO NO ND NO 1 S ug/L 6010C <br /> Baran(d) 750 633 6S4 624 461 441 446 15 50 ug/L 6010C <br /> Cadmium(d) 10 NO NO NO NO NO NO 1 5 ug/L 6010C <br /> Chromium(d) 100 NO NO NO NO ND NO 1 5 ug/L 6010C <br /> Cobalt(d) 50 4.23(J) 18.8 6.01 1.35(J) NO NO 1 5 ug/L 6010C <br /> Copper(d) 200 6.1(1) NO NO 5.55(J) NO NO 3 10 ug/L 6010C <br /> Iron(d) 5000 474 55.6(J) NO 1390 249 242 30 100 ug/L 601OC <br /> Lead(d) 100 NO NO 3.99(J) NO NO NO 3.3 10 ug/L 6010C <br /> Lithium(d) 2500 664 689 476 779 665 571 3 10 ug/L 6020A <br /> Manganese(d) 200 591 1140' 663' 201' 166 101 2 10 ug/L 6010C <br /> Mercury(d) 10 NO NO NO NO NO NO 0.067 0.2 ug/L 7470A <br /> Nickel(d) 200 28.9 68.8 17.1 16.3 6.07 3.59(J) 1.5 5 ug/L 6010C <br /> Selenium(d) 20 NO NO 6.19(J) NO NO NO 6 30 ug/L 6010C <br /> Vanadium(d) 100 NO NO 1.16(J) 2.3(J) NO NO 1 5 ug/L 6010C <br /> Zinc(d) 2000 24.8 NO 8.99 0) 26.7 NO 10.2 3.3 10 ug/L 6010C <br /> Total Dissolved Solids -- NS 5030 NA 5510 5270 NA 14.3 14.3 mg/L EPA 160.1 <br /> Fluoride(d) 2 NS NO ND 0.415(1) NO ND 1 1 mg/L EPA 300.0 <br /> Nitrite(d) 10 NS NO ND NO ND NO 1 1 mg/L EPA 300.0 <br /> N Nitrite&Nitrate(d) 100 ND NO NO NO NO NO 0.02 0.02 mg/L EPA 353.2 <br /> Notes: <br /> Exceeds CO State Agricultural Use Standard <br /> (d)=dissolved <br /> (1)=Result reported greater than the detection limit but less than the reporting limit <br /> NO=Not Detected above reporting limit <br /> NA=Not Analyzed(lab error) <br /> NS=Not Sufficient sample volume <br /> Laboratory analyses by Origins Laboratory;Denver,CO <br />