Section 5-1.91 - Variance from required use of any specified treatment technique

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New York Codes, Rules and Regulations

Contaminant	Best Available Technologies
Contaminant	PTA¹	GAC²	OX³
Alachlor		X
Aldicarb		X
Aldicarb sulfone		X
Aldicarb sulfoxide		X
Atrazine		X
Benzene	X	X
Benzo(a)pyrene		X
Carbofuran		X
Carbon tetrachloride	X	X
Chlordane		X
Dalapon		X
Di(2-ethylhexyl)adipate	X	X
Di(2-ethylhexyl)phthalate		X
2,4-D		X
Dibromochloropropane	X	X
1,1-Dichloroethylene	X	X
para-Dichlorobenzene	X	X
o-Dichlorobenzene	X	X
1,2-Dichloroethane	X	X
cis-1,2-Dichloroethylene	X	X
trans-1,2-Dichloroethylene	X	X
Dichloromethane	X
1,2-Dichloropropane	X	X
Dinsoeb		X
1,4-Dioxane			X
Endothal		X
Endrin		X
Ethylbenzene	X	X
Ethylene dibromide	X	X
Glyphosate			X
Heptachlor		X
Heptachlor epoxide		X
Hexachlorobenzene		X
Hexachlorocyclopentadiene	X	X
Lindane		X
Methoxychlor		X
Monochlorobenzene	X	X
Oxamyl (Vydate)		X

Technologies for Achieving MCL Compliance
Chemical Name	Best Available Technologies
Antimony	2,7
Arsenic⁵	1,2,5,6,7,9,13⁶
Asbestos	2,3,8
Barium	5,6,7,9
Beryllium	1,2,5,6,7
Cadmium	2,5,6,7
Chromium	2,5,6²,7
Cyanide	5,7,10
Fluoride	1,7
Mercury (Hg)	2¹,4,6¹,7¹
Nickel	5,6,7
Nitrate	5,7
Nitrite	5,7, 9
Selenium	1,2³,6,7,9
Thallium	1,5
Gross alpha (excluding radon and uranium)	7
Combined radium (226 and 228)	5,6,7
Uranium	5,6,7,12⁴
Beta particle and photon radioactivity	5,7

Technology for Arsenic MCL Compliance at Systems Serving ≤10,000
Small system compliance technology¹	Affordable for listed small system categories
Activated Alumina (centralized)	All Systems Serving 25-10,000
Activated Alumina (Point-of-Use)²	All Systems Serving 25-10,000
Coagulation/Filtration³	Systems Serving 501-10,000
Coagulation-assisted Microfiltration	Systems Serving 501-10,000
Electrodialysis reversal⁴	Systems Serving 501-10,000
Enhanced coagulation/filtration	All Systems Serving 25-10,000
Enhanced lime softening (pH > 10.5)	All Systems Serving 25-10,000
Ion Exchange	All Systems Serving 25-10,000
Lime Softening³	Systems Serving 501-10,000
Oxidation/Filtration⁵	All Systems Serving 25-10,000
Reverse Osmosis (centralized)⁴	Systems Serving 501-10,000
Reverse Osmosis (Point-of-Use)²	All Systems Serving 25-10,000