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Laboratories Inc. --J <br /> Environmental Testing Laboratory Since 1949 <br /> Shaw Project: Foothill LF,SJ County-5 year Reported: 09/03/2009 16:26 <br /> 1326 North Market Boulevard Project Number: 124591 <br /> Sacramento,CA 95834 Project Manager: Sheila Richgels <br /> Water Analysis (Metals) <br /> Quality Control Report- Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Lab Quals <br /> Silver BSH1124 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 105.36 102.04 ug/L 103 75-125 <br /> Matrix Spike Duplicate 0910759-01 NO 106.06 102.04 ug/L 1.0 104 20 75-125 <br /> Tin BSH1124 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 226.33 204.08 ug/L 111 75-125 <br /> Matrix Spike Duplicate 0910759-01 NO 224.38 204.08 ug/L 0.9 110 20 75-125 <br /> Thallium BSH1124 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 451.61 408.16 ug/L 111 75-125 <br /> Matrix Spike Duplicate 0910759-01 NO 461.85 408.16 ug/L 1.8 113 20 75-125 <br /> Vanadium BSH1124 Duplicate 0910759.01 17.840 18.601 ug/L 4.2 20 <br /> Matrix Spike 0910759-01 17.840 242.87 204.08 ug/L 110 75-125 <br /> Matrix Spike Duplicate 0910759-01 17.840 243.67 204.08 ug/L 0.9 111 20 75-125 <br /> Zinc BSH1124 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 591,01 510.20 ug/L 116 75-125 <br /> Matrix Spike Duplicate 0910759-01 NO 591.57 510.20 ug/L 0 116 20 75-125 <br /> Mercury BSH1672 Duplicate 0910769-01 NO NO ug/L 20 <br /> Matrix Spike 0910759.01 NO 1.0425 1.0000 ug/L 104 70-130 <br /> Matrix Spike Duplicate 0910759-01 NO 1.0200 1.0000 ug/L 1.9 102 20 70-130 <br /> Arsenic BSH1794 Duplicate 0910759-01 2.1770 2.3050 ug/L 6.7 20 <br /> Matrix Spike 0910759-01 2.1770 104.37 102.04 ug/L 100 70-130 <br /> Matrix Spike Duplicate 0910759-01 2.1770 105.48 102.04 ug/L 1.0 101 20 70-130 <br /> Lead SSH1794 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 103.29 102.04 ug/L 101 70-130 <br /> Matrix Spike Duplicate 0910759-01 NO 105.10 102.04 ug/L 2.0 103 20 70-130 <br /> Manganese BSH1794 Duplicate 0910759-01 NO NO ug/L 20 <br /> Matrix Spike 0910759-01 NO 101.21 102.04 ug/L 99.2 70-130 <br /> Matrix Spike Duplicate 0910759-01 NO 101.97 102.04 ug/L 0.7 99.9 20 70-130 <br /> The results in this report apply to the samples analyzed in accordance u-ith the chain ojcustot(y document.This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting parry. BC Laboratories.Inc.assumes no responsibility for report alteration,separation,detachment or third party interpretation. <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www,bclabs.com Page 62 of 83 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />