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Laboratories Inc. <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 (General Chemistry) <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 /> Total Sulfide BSH0998 Duplicate 0910759-01 ND ND mg/L 10 <br /> Matrix Spike 0910759-01 ND 0.47823 0.50000 mg/L 95.6 80-120 <br /> Matrix Spike Duplicate 0910759-01 ND 0.47681 0.50000 mg/L 0.2 95.4 10 80-120 <br /> Chloride BSH1067 Duplicate 0910751-02RE1 90.510 91.105 mg/L 0.7 10 <br /> Matrix Spike 0910751-02RE1 90.510 637.18 505.05 mg/L 108 80-120 <br /> Matrix Spike Duplicate 0910751-02RE1 90.510 643.59 505.05 mg/L 1.8 110 10 80-120 <br /> ------------- --- ------------------- -- ---- -- - <br /> Nitrate as N SSH1067 Duplicate 0910751-02RE1 32.840 33.855 mg/L 3,0 10 <br /> Matrix Spike 0910751-02RE1 32.840 59.232 25.253 mg/L 105 80-120 <br /> Matrix Spike Duplicate 0910751-02RE1 32.840 60.879 25.253 mg/L 5.6 111 10 80-120 <br /> Sulfate BSH1067 Duplicate 0910751-02RE1 73.715 76.815 mg/L 41 10 <br /> Matrix Spike 0910751-02RE1 73.715 616.25 505.05 mg/L 107 80-120 <br /> Matrix Spike Duplicate 0910751-02RE1 73.715 629.75 505.05 mg/L 2.8 110 10 80-120 <br /> Calcium BSH1124 Duplicate 0910759-01 15.899 15.933 mg/L 0.2 20 <br /> Matrix Spike 0910759-01 15.899 27.082 10.204 mg/L 110 75-125 <br /> Matrix Spike Duplicate 0910759-01 15,899 26.737 10.204 mg/L 3.7 106 20 75-125 <br /> Magnesium BSH1124 Duplicate 0910759-01 8.5277 8.5328 mg/L 0.1 20 <br /> Matrix Spike 0910759-01 8,5277 19.863 10.204 mg/L 111 75-125 <br /> Matrix Spike Duplicate 0910759-01 8.5277 19.864 10.204 mg/L 0 111 20 75-125 <br /> Sodium BSH1124 Duplicate 0910759-01 12.641 12.710 mg/L 0.5 20 <br /> Matrix Spike 0910759-01 12.641 23.959 10.204 mg/L 111 75-125 <br /> Matrix Spike Duplicate 0910759-01 12.641 23.750 10.204 mg/L 1.8 109 20 75-125 <br /> Potassium BSH1124 Duplicate 0910759-01 3.3112 3.3404 mg/L 0.9 20 <br /> Matrix Spike 0910759-01 3.3112 14.606 10.204 mg/L 111 75-125 <br /> Matrix Spike Duplicate 0910759-01 3.3112 14,399 10.204 mg/L 1.8 109 20 75-125 <br /> Bicarbonate BSH1132 Duplicate 0910749-08 265.82 266.00 mg/L 0.1 10 <br /> Carbonate BSH1132 Duplicate 0910749-08 ND ND mg/L 10 <br /> The results in this report apply to the samples analyzed in accordance with the chain ofcusiody document.This analvacal report must he reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation,detachment or third parry interpretation. <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bciabs.com Page 59 of 83 <br /> Certifications: California-ELAP Certification Number 1186; Nevada Administrative Code-NAC-445A <br />