Code of Maryland Regulations › Title 26 - DEPARTMENT OF ENVIRONMENT › Part 1 - SUBTITLES 01-07 › Subtitle 04 - REGULATION OF WATER SUPPLY, SEWAGE DISPOSAL, AND SOLID WASTE › Chapter 26.04.01 - Quality of Drinking Water in Maryland › Section 26.04.01.07-1 - Best Available Technology for Organic Chemicals

Current through Register Vol. 51, No. 14, July 12, 2024
A. The Approving Authority has identified the
				  best available technology to achieve the maximum contaminant levels for
				  contaminants listed in Regulation .07D and E of this chapter. These
				  technologies include granular activated carbon (GAC), packed tower aeration
				  (PTA), and oxidation (OX).
B. The
				  best available technology for each contaminant listed in Regulation .07D and E
				  of this chapter is specified in the following table:
BAT for Chemicals Listed in Regulation .07D and E of This
					 Chapter
Contaminant
GAC
PTA
OX
(1) Alachlor
X
(2) Atrazine
X
(3) Benzene
X
X
(4) Benzo[a]pyrene
X
(5) Carbofuran
X
(6) Carbon tetrachloride
X
X
(7) Chlordane
X
(8) Dalapon
X
(9) 2,4-D
X
(10) Di-(2-ethylhexyl)adipate
X
X
(11) Di(2-ethylhexyl)phthalate
X
(12) Dibromochloropropane
X
X
(13) o-Dichlorobenzene
X
X
(14) para-Dichlorobenzene
X
X
(15) 1,2-Dichloroethane
X
X
(16) 1,1-Dichloroethylene
X
X
(17) cis-1,2-Dichloroethylene
X
X
(18) trans-1,2-Dichloroethylene
X
X
(19) Dichloromethane
X
(20) 1,2-Dichloropropane
X
X
(21) Dinoseb
X
(22) Diquat
X
(23) Endothall
X
(24) Endrin
X
(25) Ethylbenzene
X
X
(26) Ethylene dibromide (EDB)
X
X
(27) Glyphosate
X
(28) Heptaclor
X
(29) Heptachlor epoxide
X
(30) Hexachlorobenzene
X
(31) Hexachlorocyclopentadiene
X
X
(32) Lindane
X
(33) Methoxychlor
X
(34) Monochlorobenzene
X
X
(35) Oxamyl (vydate)
X
(36) Pentachlorophenol
X
(37) Picloram
X
(38) Polychlorinated biphenyls (PCB)
X
(39) Simazine
X
(40) Styrene
X
X
(41) 2,3,7,8-TCDD (dioxin)
X
(42) Tetrachloroethylene
X
X
(43) Toluene
X
X
(44) Toxaphene
X
(45) 2,4,5-TP (Silvex)
X
(46) 1,2,4-Trichlorobenzene
X
X
(47) 1,1,1-Trichloroethane
X
X
(48) 1,1,2-Trichloroethane
X
X
(49) Trichloroethylene
X
X
(50) Vinyl chloride
X
(51) Xylene
X
X
C.
				  Disinfection Byproducts and Disinfectants. The best available technology,
				  treatment technique, or other means available for each contaminant listed in
				  Regulations .07F and .23C of this chapter is specified in the following table:
Disinfection Byproduct
Best Available Technology
TTHM, HAA5
Primary Systems: Enhanced coagulation or enhanced
							 softening or GAC10, with chlorine as the primary and residual
							 disinfectant.
Primary systems that disinfect their source water:
							 Enhanced coagulation or enhanced softening, plus GAC10; or nanofiltration with
							 a molecular weight cutoff not greater than or equal to 1,000 Daltons; or
							 GAC20.
Consecutive systems that receive disinfected
							 water:
Systems serving 10,000 or more: Improved distribution
							 system and storage tank management to reduce residence time, plus the use of
							 chloramines for disinfectant residual maintenance.
Systems serving less than 10,000: Improved distribution
							 system and storage tank management to reduce residence time.
Bromate
Control of ozone treatment process to reduce production
							 of bromate.
Chlorite
Control of treatment processes to reduce disinfectant
							 demand and control of disinfection treatment processes to reduce disinfectant
							 levels.
Maximum residual disinfectant levels
Control of treatment processes to reduce disinfectant
							 demand and control of disinfection treatment processes to reduce disinfectant
							 levels.