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Laboratories, inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) <br />ii <br />ID <br />• 04 <br />L67204 <br />: <br />Lorencito Coal Company ACZ Sample . <br />Project ID: Date Sampled: 0111210816:00 <br />Sample ID: PRGTY 1 Date Received: 01115108 <br />Sample Matrix: Surface Water <br />Wet Chemistry <br />-- <br /> <br />Alkalinity as CaCO3 SM2320B - Titration <br />Bicarbonate as 201 m91L 2 20 01/16/08 0:00 Icp <br />CaCO3 <br />Carbonate as CaCO3 <br />14 <br />B <br />mg/L <br />2 <br />20 <br />01/16/08 0:00 <br />Icp <br />Hydroxide as CaC03 U mg/L 2 20 01/16/08 0:00 lcp <br />Total Alkalinity 215 * mg/L 2 20 01/16/080-00 Icp <br /> <br />Ammonia as N, un- <br />M350.1 -Calculation < <br />U <br />M91L <br />0.01 <br />0.05 <br />01/28108 0:00 <br />Cale <br />Ionized <br />Cation-Anion Balance Calculation <br />Cation-Anion Balance 1.8 % 01/28108 0:00 talc <br />Sum of Anions 5.4 meq/L 0.1 0.5 01/28/08 0:00 Cale <br />Sum of Cations 5.6 meq/L 0.1 0.5 01/28/080:00 Cale <br />Chloride 325.2 / SM45000I-E 12 mg/L 1 5 01/21/0814:05 and <br />Conductivity @25C 120.11 SM2510B 504 umhos/cm 1 10 01/16/08 23:48 lcp <br />Hardness as CaCO3 SM2340B - Calculation 167 mg/L 1 7 01/28/080:00 Cale <br />Lab Filtration SM 3030 B 01/1510815:40 cas <br />Lab Filtration & SM 3030 B 01/16/089-.58 wpl <br />• <br />Acidification <br />NiftWen, ammonia M350.1 - Automated Phenate U ' mg/L 0.05 0.5 01/22/08 20:31 pjb <br />pH (lab) 150.1 / SM4500H+ B <br />pH 8.6 H units 0.1 0.1 01/161080,00 Icp <br />pH measured at 23.0 C 0.1 0.1 01/16108 0:00 Icp <br />Residue, Filterable 160.1 / SM2540C 290 mg/L 10 20 01/15/0815:14 cas <br />(TDS) @180C <br />Sodium Absorption USGS -11738.78 1.74 0.03 0.15 01/28!08 0:00 talc <br />Ratio in Water <br />Sulfate 375A - Turbidimetric 39 ' mg/L 1 5 01/24/0814:20 am <br />TDS (calculated) Calculation 298 mg/L 10 50 01/28/08 0:00 Cale <br />MS (ratio - Calculation 0.97 01/28010:00 talc <br />measured/calculated) <br />C J <br />REPIN.02.06.05.01 * Please refer to Qualifier Reports for details. <br />3345493 <br />L67204: Page 9 of 20