Total Residual Free Chlorine (Cl)

Daily Quality Control Standard (with 3 Fluorinated Compounds Internal Standard) 14 Analytes + 3 ISTD, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% n-Hexane 12 Toluene

Fenuron, 100µg/ml in Acetonitrile, 5ml

EPA Method 8021B Mix #3