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Enviro-Chem, Inc. 1214 E. Lexington Avenue, Pomona, CA 91766 Tel (909)590-5905 Fax(909)590-5907 Matrix: WATER/LIQUID Q.4/QC Report Analysis Units Date Analyzed Sample I.D. S.R. I Duplicate j %RPD ACP%RPD Alkalinity mg/L 0.00% 0-20 Residual Chlorine mg/L I 0.00% 0-20 EC/SC umhos/cm 0.00% 0-20 pH pH units 2/20/2023 230220-7 j 1.05 1.07 1.89% 0-20 TDS mg/L I 0.00% 0-20 TSS mg/L 0.00% 0-20 Turbidity mg/L 0.00% 0-20 %Moisture 4, 0.00% 0-20 DENSITY ohms 0.00% 0-20 Settleable Solid mL/L/hr 0.00% 0-20 Resistivity ohms 0.00% 0-20 ACIDITY mg/L 0.00% 0-20 %RPD= Relative Percent Difference ACP%RPD=Acceptable Relative Percent Difference Analysis Units Date Analyzed Sample I.D. Spk Conc S.R. ACP%RPD ACP%RC MS MS%RC M$D MSD%RC %RPD Acidity mg/L 0.00 0-20 80-120 #VALUE! I Ammonia as N mg/L 5.00 0.00 0-20 80-120 #VALUE! Chloride mg/L 20.0 0.00 0-20 80-120 #VALUE! COD mg/L 500 0.00 0-20 80-120 #VALUE! CR VI mg/L 0.400 0.00 0-20 80-120 #VALUE! Cyanide mg/L 0.200 0.00 0-20 80-120 #VALUE! Fluoride mg/L 1.00 0.00 0-20 80-120 #VALUE! MBAS mg/L 0.600 0.00 0-20 80-120 #VALUE! Nitrate as N mg/L 0.400 0.00 0-20 80-120 #VALUE! Nitrite as N mg/L 0.400 0.00 0-20 80-120 #VALUE! EPA 1664A mg/L 20.0 0.00 f 0-20 80-120 #VALUE! OIL&GREASE 413.2 mg/L 20.0 0.00 0-20 80-120 I #VALUE! Phenolics mg/L 0.500 0.00 0-20 80-120 #VALUE! Sulfate mg/L 20.0 0.00 0-20 80-120 #VALUE! Dissolved Sulfide mg/L 0.300 0.00 j 0-20 80-120 #VALUE! Total Sulfide mg/L 0.300 0.00 0-20 80-120 #VALUE! Formaldehyde mg/L 0.50 0.00 ± 0-20 80-120 #VALUE! S.R. =Sample Results %RC= Percent Recovery ACP%RC =Acceptable Percent Recovery Spk Conc= Spike Concentration I i Analyst Signature: Final Reviewer: