Section 327IAC8-2-5.4. Volatile organic compounds; maximum contaminant levels for community water systems and nontransient noncommunity water systems

  4. (a) The following MCLs for volatile organic compounds (VOCs) apply to community water systems and nontransient noncommunity water systems:

CAS No.	Contaminant	Level in Milligrams Per Liter
71-43-2	Benzene	0.005
75-01-4	Vinyl chloride	0.002
56-23-5	Carbon tetrachloride	0.005
107-06-2	1,2-dichloroethane	0.005
79-01-6	Trichloroethylene	0.005
75-35-4	1,1-dichloroethylene	0.007
71-55-6	1,1,1-trichloroethane	0.2
106-46-7	para-dichlorobenzene	0.075
156-59-2	cis-1,2-dichloroethylene	0.07
78-87-5	1,2-dichloropropane	0.005
100-41-4	Ethylbenzene	0.7
108-90-7	Monochlorobenzene	0.1
95-50-1	ortho-dichlorobenzene	0.6
100-42-5	Styrene	0.1
127-18-4	Tetrachloroethylene	0.005
108-88-3	Toluene	1
156-60-5	trans-1,2-dichloroethylene	0.1
1330-20-7	Xylenes (total)	10
75-09-2	Dichloromethane	0.005
120-82-1	1,2,4-trichlorobenzene	0.07
79-00-5	1,1,2-trichloroethane	0.005

  (b) BAT for achieving compliance with the MCL for the volatile organic compounds listed in subsection (a) is:

(1) central treatment using packed tower aeration except toluene;

(2) central treatment using granular activated carbon for each chemical except vinyl chloride and dichloromethane; or

(3) other means available for achieving compliance with the maximum contaminant levels identified in subsection (a).

  (c) Monitoring frequency and compliance with MCLs for VOCs are determined under section 5.5 of this rule. (Water Pollution Control Division; 327 IAC 8-2-5.4; filed Dec 28, 1990, 5:10 p.m.: 14 IR 1013; filed Aug 24, 1994, 8:15 a.m.: 18 IR 39)