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Page 6 <br />Synthetic Organic <br />Chemicals <br />(SOCs) <br />California U.S. EPA <br />MCL MCL Effective <br />Date DLR PHG PHG <br />Date MCL MCL Effective <br />Date MCLG <br />Pentachlorophenol 1 1994-09-08 0.2 0.3 2009 1 1992-07-30 zero <br />Picloram 500 1994-09-08 1 166 2016 500 1994-01-17 500 <br />Polychlorinated biphenyls <br />(PCBs) <br />0.5 1994-09-08 0.5 0.09 2007 0.5 1992-07-30 zero <br />Simazine 4 <br />10 <br />1994-09-08 <br />1989-04-05 <br />1 4 2001 4 1994-01-17 4 <br />Thiobencarb 70 1989-04-05 1 42 2016 ------ <br />Toxaphene 3 <br />5 <br />1994-09-08 <br />1977 <br />1 0.03 2003 3 <br />5 <br />1992-07-30 <br />1977-06-24 <br />zero <br />1,2,3-Trichloropropane 0.005 2017-12-14 0.005 0.0007 2009 ------ <br />2,3,7,8-TCDD (dioxin)0.00003 1994-09-08 5 x10-6 5 x10-8 2010 0.00003 1994-01-17 zero <br />2,4,5-TP (Silvex)50 <br />10 <br />1994-09-08 <br />1977 <br />1 3 2014 50 <br />10 <br />1992-07-30 <br />1977-06-24 <br />50 <br />Disinfectant Residuals <br />Standards for disinfectant residuals are called “Maximum Residual Disinfectant Levels” (MRDLs) instead of MCLs. Similarly, <br />goals are called “Maximum Residual Disinfectant Level Goals” (MRDLGs). The information in the following table can be found <br />in 22 CCR §64533.5 (California MRDLs), 40 CFR §141.65 (U.S. EPA MRDLs), and 40 CFR §141.54 (U.S. EPA MRDLGs). The <br />values in this table are in units of milligrams per liter (mg/L). <br />Disinfectant <br />Residuals <br />California U.S. EPA <br />MRDL MRDL Effective Date DLR PHG PHG Date MRDL MRDL Effective Date MRDLG <br />Chlorine 4.0 (as Cl2)2006-06-17 ------4.0 1999-02-16 4 <br />Chloramines 4.0 (as Cl2)2006-06-17 ------4.0 1999-02-16 4 <br />Chlorine dioxide 0.8 (as ClO2)2006-06-17 ------0.8 1999-02-16 0.8 <br />9.B. - Page 22 of 27 <br />211