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rwLaboratories Inc. I tU' <br />Environmental Testing Laboratory Since 1949 <br />haw Reported: 02/22/2011 14:26 <br />180 Promenade Circle, Suite 320 Project: Foothill Landfill <br />Sacramento, CA 95834 Project Number. 139867 Groundwater <br />Project Manager. Sheila Richgels <br />Water Analysis (General Chemistry) <br />Quality Control Report - Precision & Accuracy <br />Control Limits <br />Source Source Spike Percent Percent Lab <br />:onstituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals <br />QC Batch ID: BUA1643 <br />J Used client sample: N <br />Total Dissolved Solids @ 180 C <br />DUP 1101390-01 2020.0 <br />2050.0 <br />mg/L <br />1.5 <br />10 <br />QC Batch ID: BUA1657 <br />Used client sample: Y - Description: MW -4, 01/26/2011 07:39 <br />Chloride <br />DUP 1101449-04 6.1720 <br />5.8960 <br />mg/L <br />4.6 <br />10 <br />MS 1101449-04 6.1720 <br />111.11 <br />101.01 <br />mg/L <br />104 <br />80-120 <br />MSD 1101449-04 6.1720 <br />111.37 <br />101.01 <br />mg/L <br />0.2 <br />104 <br />10 <br />80-120 <br />Nitrate as N <br />DUP 1101449-04 1.7800 <br />1.8370 <br />mg/L <br />3.2 <br />10 <br />MS 1101449-04 1.7800 <br />6.7960 <br />5.0505 <br />mg/L <br />99.3 <br />80-120 <br />MSD 1101449-04 1.7800 <br />6.9091 <br />5.0505 <br />mg/L <br />1.7 <br />102 <br />10 <br />80-120 <br />Sulfate <br />DUP 1101449-04 7.7770 <br />7.9970 <br />mg/L <br />2.8 <br />10 <br />MS 1101449-04 7.7770 <br />111.64 <br />101.01 <br />mg/L <br />103 <br />80-120 <br />MSD 1101449-04 7.7770 <br />111.78 <br />101.01 <br />mg/L <br />0.1 <br />103 <br />10 <br />80-120 <br />QC Batch ID: BUA17O2 <br />Used client sample: N <br />rbonate <br />DUP 1101446-05 694.86 <br />700.79 <br />mg/L <br />0.9 <br />10 <br />Carbonate <br />DUP 1101446-05 ND <br />ND <br />mg/L <br />10 <br />Total Alkalinity as CaCO3 <br />DUP 1101446-05 569.89 <br />574.76 <br />mg/L <br />0.9 <br />10 <br />QC Batch ID: BUB0198 <br />Used client sample: N <br />Dissolved Calcium <br />DUP 1101462-01 58.334 <br />58.751 <br />mg/L <br />0.7 <br />20 <br />MS 1101462-01 58.334 <br />68.743 <br />10.204 <br />mg/L <br />102 <br />75-125 <br />MSD 1101462-01 58.334 <br />68.580 <br />10.204 <br />mg/L <br />0.2 <br />100 <br />20 <br />75-125 <br />Dissolved Magnesium <br />DUP 1101462-01 76.021 <br />76.808 <br />mg/L <br />1.0 <br />20 <br />MS 1101462-01 76.021 <br />87.201 <br />10.204 <br />mg/L <br />110 <br />75-125 <br />MSD 1101462-01 76.021 <br />87.239 <br />10.204 <br />mg/L <br />0.0 <br />110 <br />20 <br />75-125 <br />Dissolved Sodium <br />DUP 1101462-01 22.263 <br />22.423 <br />mg/L <br />0.7 <br />20 <br />MS 1101462-01 22.263 <br />32.247 <br />10.204 <br />mg/L <br />97.8 <br />75-125 <br />MSD 1101462-01 22.263 <br />31.464 <br />10.204 <br />mg/L <br />2.5 <br />90.2 <br />20 <br />75-125 <br />Dissolved Potassium <br />DUP 1101462-01 0.19602 <br />0.16499 <br />mg/L <br />17.2 <br />20 <br />J <br />MS 1101462-01 0.19602 <br />10.166 <br />10.204 <br />mg/L <br />97.7 <br />75-125 <br />MSD 1101462-01 0.19602 <br />10.156 <br />10.204 <br />mg/L <br />0.1 <br />97.6 <br />20 <br />75-125 <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document This analytical report <br />must be reproduced in its entirety. <br />All results listed m this report are for the exclusive use of the submitting party. BC IAboratories, Inc. assumes no responsibility <br />for report alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bdabs.com <br />Page 35 of 36 <br />