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Weck Laboratories, Inc. <br />Environmental and Analytical Services - <br />Supplement To Certificate of Analysis <br />This is a Supplement to the Certificate of Analysis document issued previously for the above indicated project <br />Work Order No: 7072636-03 Sample ID: MW -3 <br />Matrix: Water <br />Sampled by: Client <br />Sampled: 07/24/07 12:04 <br />Sample <br />Note: P0700685-003 <br />Reporting <br />Analyte Result <br />MDL Qualifier <br />Units <br />Limit Dilution <br />Method <br />Prepared <br />Analyzed Batch <br />Magnesium, Dissolved...................11 <br />0.0024 <br />mg/1 <br />0.10 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Sodium, Dissolved .........................16 <br />0.21 <br />mg/l <br />0.50 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Carbonate Alkalinity as CaCO3.... ND <br />mg/l <br />2.0 1 <br />SM 2320B <br />08/01/07 <br />08/02/07 tbd W7H0043 <br />Bicarbonate Alkalinity as HCO3 ... 130 <br />mg/l <br />2.0 1 <br />SM 2320B <br />08/01/07 <br />08/02/07 tbd W7H0043 <br />Total Dissolved Solids...................200 <br />4.0 <br />mg/1 <br />10 1 <br />SM2540C <br />07/26/07 <br />07/27/07 ccc W7G0968 <br />Work Order No: 7072636-04 Sample ID: LW -1 <br />Matrix: <br />Water <br />Sampled by: Client <br />Sampled: 07/24/07 10:47 <br />Sample <br />Note: P0700685-004 <br />Reporting <br />Analyte Result <br />MDL Qualifier <br />Units <br />Limit Dilution <br />Method <br />Prepared <br />Analyzed Batch <br />Calcium, Dissolved ........................25 <br />0.0039 <br />mg/l <br />0.10 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Potassium, Dissolved ..................... 4.7 <br />0.079 <br />mg/l <br />0.10 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Magnesium, Dissolved...................10 <br />0.0024 <br />mg/1 <br />0.10 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Sodium, Dissolved .........................13 <br />0.21 <br />mg/l <br />0.50 1 <br />EPA 6010 <br />07/30/07 <br />08/03/07 jba W7G1058 <br />Carbonate Alkalinity as CaCO3.... ND <br />mg/l <br />2.0 1 <br />SM 2320B <br />08/01/07 <br />08/02/07 tbd W7H0043 <br />Bicarbonate Alkalinity as HCO3 ... 130 <br />,ng/1 <br />2.0 1 <br />SM 2320B <br />08/01/07 <br />08/02/07 tbd W7H0043 <br />Total Dissolved Solids...................190 <br />4.0 <br />mg/1 <br />l0 1 <br />SM2540C <br />07/26/07 <br />07/27/07 ccc W7G0968 <br />Lab#:7072636 . 12 Page 2 of 5 <br />14859 East Clark Avenue, City of Industry, California 45-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.wecklabs.com <br />