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A~Z Laboratories, Inc. <br />• 2773 Downhill Onve Steamboat Springs, CO 80487(800) 334-5493 ° ' ~ ~ ' N <br />Lorencito Coal Company ACZ Sample ID: L49298-02 <br />Project ID: Date Sampled: 12/28/04 11:05 <br />Sample ID: PRGTY-1 Date Received: 12/29/04 <br /> Sample Matrix: Surface Water <br />Wet Chemistry <br /> <br />Alkalinity as CaCO3 SM2320B-TitraOon <br />Bicarbonate as 160 mglL 2 10 01/04/05 0:00 jah <br />CaCO3 <br />Carbonate as CaCO3 U mglL 2 10 01/04/05 0:00 jah <br />Hydroxide as CaCO3 U mglL 2 10 01/04/05 0:00 jah <br />Total Alkalinity 160 mg/L 2 10 Oi/04/05 0:00 jah <br />Ammonia as N, un- M350.1 -Calculation U mglL 0.01 0.05 01/26/05 0:00 talc <br />ionizetl <br />Cation-Anion Balance Calwlatton <br />Cation-Anion Balance -1.2 % 0126/05 0:00 talc <br />Sum of Minns 4.3 meglL 0.1 0.5 0126/05 0:00 talc <br />Sum of Cations ~ 4.2 meglL 0.1 0.5 0126/05 0:00 talc <br />Chlodde M325.2-Colodmetric 4 B mglL 1 5 01107/0517:25 ccp <br />Conductivity Q25C M120.1 -Meter 363 umhoslcm 1 10 01104/05 16:26 jah <br />Hardness as CaC03 SM2340B - Calculation 179 mglL 1 7 0126105 0:00 talc <br />Lab Ritration SM 3030 B 1229104 17:50 jah <br />LaD Filtration 8 SM 3030 B 1229/04 19:23 ak <br />Acidification <br />• <br />Nitrogen, ammonia M350.1 -Automated Phenate U mglL 0.05 0.5 Oi/06/0513:26 ccp <br />pH (lab) M150.1 - Elecbometrk 8.3 H unas 0.1 0.1 O7/04/05 16:26 jah <br />Residue, Filterable M160.1-Gravimebic 250 mglL 10 20 01/04/059:44 kid <br />(TDS) @180C <br />Residue, Non- M160.2 - Gravimetdc U mg/L 5 20 1229/04 16:36 ktd <br />Filterable (TSS) <br />Q105C <br />Sodium Absorption USGS - 11738-78 0.46 0,03 0.15 0126/05 0:00 wlc <br />Ratio in Water <br />Sulfate M375.3-Grevimetric 50 mgA. 10 50 01111/0510:48 ims <br />TDS (calculated) Cafwtatfon 230 mglL 10 50 0126/050:00 talc <br />TDS (ratio - Calculation 1.09 0126/05 0:00 plc <br />measuredlcalculated) <br />• REPIN.01.11.00.01 'Please refer to Extended Qualifier Repurl for detail. <br />IA929g: Page 5 of 15 <br />