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Commercial - Dissolved Oxygen Re: Certificate of Analysis Results of Analysis for samples received 3/18/99, for testing as requested Dissolved Oxygen (DO) by EPA 360.1 Matrix: Water Date Sampled 3/18/99 Lab # Sample ID Concentration Unit   Influent Municipal Water     90974 Coeur d'Alene drinking water (0.25 mg/l Cl2) 3.60 mg/L   PW1 Ozonated Water     90971 STAGE 1 - Immediately after O3 8.00 mg/L 90972 STAGE 1 - 5 Minutes after O3 7.95 mg/L 90973 STAGE 1 - 10 Minutes after O3 7.95 mg/L * Results may vary according to influent water source BACK