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Laboratories Inc. --i ---i Environmental Testing Laboratory Since 1949 Shaw Project: Foothill LF,SJ County-5 year Reported: 09/03/2009 16:26 1326 North Market Boulevard Project Number: 124591 Sacramento,CA 95834 Project Manager: Sheila Richgels Water Analysis (General Chemistry) Quality Control Report- Laboratory Control Sample Control Limits Spike Percent Percent Constituent Batch ID 00 Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals Total Sulfide BSH0998 BSH0998-BS1 LCS, 0.49527 0.50000 0.10 mg/L 99.1 90-110 Chloride BSH1067 BSH1067-BSI LCS 101.77 100.00 0.50 mg/L 102 90-110 Nitrate as N BSH1067 BSH1067-BS1 LCS 5.0610 5.0000 0.10 mg/L 101 90-110 — Sulfate BSH1067 BSH1067-BS1 LCS 100.61 100.00 1.0 mg/L 101 90-110 ------- ----- -- -- ------ -- ------------ ---------- Calcium BSH1124 BSH1124-BSI LCS 10.628 10.000 0.10 mg/L 106 85-115 Magnesium BSH1124 6SH1124-BSI LCS 10.740 10.000 0.050 mg/L 107 85-115 Sodium BSH1124 BSH1124-BSI LCS 10.600 10.000 0.50 mg/L 106 85-115 ------------- Potassium BSH1124 SSH1124-BSl LCS 10.303 10.000 1.0 mg/L 103 85-115 Non-Volatile Organic Carbon BSH1166 BSH1166-BS1 LCS 5.0410 5.0000 0.30 mg/L 101 85-115 Total Cyanide BSH1536 BSH1536-BSI LCS 0.15090 0.15000 0.0050 mg/L 101 90-110 Total Dissolved Solids @ 180 C BSH1850 BSH1850-BS1 LCS 555.00 586.00 50 mg/L 94.7 90-110 The results in this report apply to the samples analyzed in accordance with the chain ofcastooy document.This analytical report must be reproduced in its entirety. 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 party interpretation. 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bdabs.com Page 68 of 83 Certifications: California-ELAP Certification Num86; Nevada Administrative Code-NAC-445A 0