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Ow <br />Weck Laboratories Inc. I <br />Analytical Laboratory Services - Since 1964 <br />Certificate of Analysis <br />Week Laboratories, Inc <br />Conventional Chemistry/Physical Parameters by APHA/EPA/ASTM Methods - Quality Control <br />Sample QC Spike I RPD <br />Analyte Result Result Qualifier Units Level %REC Limas RPD Limit <br />Batch W7110117 - General Preparation <br />r <br />Blank (W7B0147-BLKI) <br />QC <br />Prepared: 02/12/07 Analyzed: 02/22/07 <br />Prepared: 02/05/07 Analyzed: 02/06/07 <br />Analyte Result <br />Result <br />Qualifier Units <br />__ <br />Batch 3YIB0426 - EPA 3005A <br />Alkalinity as CaCO3........................ <br />0.570 J <br />mg/1 <br />Blank (W71110426-BLKI) <br />63.2 mg/l <br />Bicarbonate Alkalinity as HCO3..... <br />0.695 1 <br />mg/1 <br />ND <br />mg/1 <br />LCS (W7B0147-BSI) <br />Calcium, Dissolved .......................... <br />ND <br />Prepared: 02/05/07 Analyzed: 02/06/07 <br />Alkalinity as CaCO3........................ <br />131 <br />mg/1 <br />136 96.3 941-108 <br />Magnesium, Dissolved ..................... <br />Bicarbonate Alkalinity as HCO3..... <br />160 <br />mg/1 <br />166 96.4 94-108 <br />Duplicate (W7B0147-DUPI) <br />Source: 7020242-01 <br />Prepared: 02/05/07 Analyzed: 02/06/07 <br />Alkalinity as CaCO3 ........................1600 <br />1590 <br />mg/1 <br />0.627 15 <br />Bicarbonate Alkalinity as HCO3..... 1900 <br />]Batch W7110186 - General Preparation <br />1940 <br />mg/1 <br />2.08 15 <br />Blank (W7B0186-BLKI) <br />Prepared & Analyzed: 02/06/07 <br />Total Dissolved Solids ..................... <br />ND <br />mg/1 <br />LCS (W7B®186-BSI) <br />Prepared &Analyzed: 02/06/07 <br />Total Dissolved Solids ..................... <br />838 <br />mg/1 <br />824 102 98-103 <br />Duplicate (W7B0186-DUPI) <br />Source: 7013146-02 <br />Prepared & Analyzed: 02/06/07 <br />Total Dissolved Solids .................... 6.0 <br />6.00 J <br />mg/1 <br />0.00 10 <br />Week Laboratories, Inc <br />Metals (Aqueous) by EPA 6000/7000 Series Methods - Quality Control <br />F-1 <br />Sample <br />QC <br />Prepared: 02/12/07 Analyzed: 02/22/07 <br />Spike %R1✓C RPD <br />Analyte Result <br />Result <br />Qualifier Units <br />Level %REC Limits RPD Limit <br />Batch 3YIB0426 - EPA 3005A <br />50.2 mg/1 <br />51.0 98.4 85-115 <br />Blank (W71110426-BLKI) <br />63.2 mg/l <br />Prepared: 02/12/07 Analyzed: 02/22/07 <br />Sodium, Dissolved ........................... <br />ND <br />mg/1 <br />Calcium, Dissolved .......................... <br />ND <br />mg/1 <br />Potassium, Dissolved ....................... <br />0.0753 <br />J mg/1 <br />Magnesium, Dissolved ..................... <br />ND <br />mg/1 <br />LCS (W7B0426-BS1) <br />Prepared: 02/12/07 Analyzed: 02/22/07 <br />Sodium, Dissolved ........................... <br />_ <br />56.0 mg/1 <br />51.0 110 85-115 <br />Calcium, Dissolved .......................... <br />50.2 mg/1 <br />51.0 98.4 85-115 <br />Potassium, Dissolved ....................... <br />63.2 mg/l <br />60.0 105 85-115 <br />Magnesium, Dissolved ..................... <br />49.9 mg/1 <br />51.0 97.8 85-115 <br />Lab#:7020240 <br />4-1 <br />Page 3 of 5 <br />venue, City of Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />www.weeklabs.com <br />