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ORR # 2002-020
DEPARTMENT OF ENVIRONMENTAL QUALITY DRINKING WATER AND RADIOLOGICAL PROTECTION DIVISION
SUPPLYING WATER TO THE PUBLIC
Filed with the Secretary of State on January 21, 2003
This rule takes effect 7 days after filing with the Secretary of State
(By authority conferred on the department of environmental quality by sections 5, 7, 14, and 19 of 1976 PA 399, MCL 325.1005, 325.1007, 325.1014, and 325.1019, and Executive Reorganization Order
No. 1996-1, MCL 330.3101)
R 325.10308b of the Michigan Administrative Code is amended as follows:
PART 3. VARIANCES AND EXEMPTIONS
R 325.10308b Best available technology.
Rule 308b. (1) The department identifies the following as the best technology, treatment technique, or other means generally available for achieving compliance with the MCL:
(a) For organic contaminants that are referenced in R 325.10604b and R 325.10604d, the best available technologies, treatment techniques, or other means available for achieving compliance with the MCLS are granular activated carbon (GAC), packed tower aeration (PTA), or oxidation (OX), as listed in table 1 of this rule.
Table 1 Best available technologies for organic contaminants
Contaminant
GAC
PTA
OX
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
2,4-D
x
Di (2-ethylhexyl)adipate
x
x
Di (2-ethylhexyl)phthalate
x
Contaminant
GAC
PTA
OX
Dibromochloropropane (DBCP)
x
x
o-Dichlorobenzene
x
x
para-Dichlorobenzene
x
x
1,2-Dichloroethane
x
x
1,1-Dichloroethylene
x
x
cis-1,2-Dichloroethylene
x
x
trans-1,2-Dichloroethylene
x
x
Dichloromethane
x
1,2-Dichloropropane
x
x
Dinoseb
x
Diquat
x
Endothall
x
Endrin
x
Ethylbenzene
x
x
Ethylene Dibromide (EDB)
x
x
Glyphosate
x
Heptachlor
x
Heptachlor epoxide
x
Hexachlorobenzene
x
Hexachlorocyclopentadiene
x
x
Lindane
x
Methoxychlor
x
Monochlorobenzene
x
x
Oxamyl (Vydate)
x
Pentachlorophenol
x
Picloram
x
Polychlorinated biphenyls(PCB)
x
Simazine
x
Styrene
x
x
2,3,7,8-TCDD (Dioxin)
x
Tetrachloroethylene
x
x
Toluene
x
x
Toxaphene
x
2,4,5-TP (Silvex)
x
1,2,4-Trichlorobenzene
x
x
1,1,1-Trichloroethane
x
x
1,1,2-Trichloroethane
x
x
Trichloroethylene
x
x
Vinyl chloride
x
Xylene
x
x
(b) For inorganic contaminants that are referenced in R 325.10604c, the best available technologies, treatment techniques, or other means available for achieving compliance with the MCLs are listed in table 2 of this rule.
Table 2 Best available technologies for inorganic contaminants
Chemical name
Best available technologies
Antimony 2,7
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
Mercury 21,4,61,71
Nickel 5,6,7
Nitrate 5,7,9
Nitrite 5,7
Selenium 1,23,6,7,9
Thallium 1,5
1 Best available technology only if influent Hg concentrations are 10 µg/l or less.
2 Best available technology for chromium III only.
3 Best available technology for selenium IV only.
Key to best available technologies in table: 1 = activated alumina
2 = coagulation/filtration
3 = direct and diatomite filtration 4 = granular activated carbon
5 = ion exchange 6 = lime softening
7 = reverse osmosis 8 = corrosion control 9 = electrodialysis
10 = chlorine
(c) For disinfection byproducts under R 325.10610(1), the best available technologies, treatment techniques, or other means available for achieving compliance with the MCLs are listed in table 3 of this rule.
Table 3 Best available technologies for disinfection byproducts
Disinfection byproduct
Best available technology
TTHM
or HAA5
Enhanced coagulation or enhanced softening or GAC10, with chlorine as the primary and residual disinfectant.
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.
(d) The best available technologies, treatment techniques, or other means available for achieving compliance with the maximum residual disinfectant levels under R 325.10610a(1) are control of treatment processes to reduce disinfectant demand and control of disinfection treatment processes to reduce disinfectant levels.
(2) The department shall require suppliers of community water systems and nontransient, noncommunity water systems to employ a treatment method identified in subrule (1) of this rule as a condition for granting a variance, except as provided in subrule (3) of this rule. If, after the treatment method is installed in the system, the system cannot meet the MCL, then the system shall be eligible for a variance pursuant to the provisions of this part and section 20 of the act.
(3) If a supplier of water can demonstrate through comprehensive engineering assessments, which may include pilot plant studies, that the treatment methods identified in subrule (1) of this rule would only achieve a de minimis reduction in contaminants, the department may issue a schedule of compliance that requires the supplier of water being granted the variance to examine other treatment methods as a condition of obtaining the variance.
(4) If the department determines that a treatment method identified in subrule (3) of this rule is technically feasible, the department may require the supplier of water to use that treatment method in connection with a compliance schedule issued pursuant to the provisions of section 20 of the act. The department's determination shall be based on studies by the supplier of water and other relevant information.
