(1)
Synthetic Organic Chemicals
MCLs. The following maximum contaminant levels for organic
contaminants apply to community water systems and non-transient, non-community
water systems.
|
CAS No.
|
Contaminant
|
MCL (mg/l)
|
|
(a)
|
15972-60-8
|
Alachlor
|
0.002
|
|
(b)
|
Reserved
|
|
(c)
|
Reserved
|
|
(d)
|
Reserved
|
|
(e)
|
1912-24-9
|
Atrazine
|
0.003
|
|
(f)
|
1563-66-2
|
Carbofuran
|
0.04
|
|
(g)
|
57-74-9
|
Chlordane
|
0.002
|
|
(h)
|
96-12-8
|
Dibromochloropropane
|
0.0002
|
|
(i)
|
94-75-7
|
2,4-D
|
0.07
|
|
(j)
|
72-20-80
|
Endrin
|
0.002
|
|
(k)
|
106-93-4
|
Ethylene dibromide
|
0.00002
|
|
(l)
|
76-44-8
|
Heptachlor
|
0.0004
|
|
(m)
|
1024-57-3
|
Heptachlor epoxide
|
0.0002
|
|
(n)
|
58-89-9
|
Lindane
|
0.0002
|
|
(o)
|
72-43-5
|
Methoxychlor
|
0.04
|
|
(p)
|
1336-36-3
|
Polychlorinated biphenyls
|
0.0005
|
|
(q)
|
87-86-5
|
Pentachlorophenol
|
0.001
|
|
(r)
|
8001-35-2
|
Toxaphene
|
0.003
|
|
(s)
|
93-72-1
|
2,4,5-TP
|
0.05
|
|
(t)
|
50-32-8
|
Benzo(a)pyrene
|
0.0002
|
|
(u)
|
75-99-0
|
Dalapon
|
0.2
|
|
(v)
|
103-23-1
|
Di(2-ethylhexyl) adipate
|
0.4
|
|
(w)
|
117-81-7
|
Di(2-ethylhexyl) phthalate
|
0.006
|
|
(x)
|
88-85-7
|
Dinoseb
|
0.007
|
|
(y)
|
85-00-7
|
Diquat
|
0.02
|
|
(z)
|
145-73-3
|
Endothall
|
0.1
|
|
(aa)
|
1071-53-6
|
Glyphosate
|
0.7
|
|
(bb)
|
118-74-1
|
Hexachlorobenzene
|
0.001
|
|
(cc)
|
77-47-4
|
Hexachlorocyclopentadiene
|
0.05
|
|
(dd)
|
23135-22-0
|
Oxamyl (Vydate)
|
0.2
|
|
(ee)
|
1918-02-1
|
Picloram
|
0.5
|
|
(ff)
|
122-34-9
|
Simazine
|
0.004
|
|
(gg)
|
1746-01-6
|
2,3,7,8-TCDD(Dioxin)
|
3x10-8
|
(2)
SOC Sampling Requirements. Beginning with the initial
compliance period, analysis of the contaminants listed in 310 CMR
22.07A(1)(a)
through (gg) for the purposes of determining compliance with the maximum
contaminant level shall be conducted as follows:
(a)
SOC Ground Water Monitoring
Protocols. Groundwater systems shall take a minimum of one sample
at every entry point to the distribution system which is representative of each
well after treatment (sampling point). Each sample must be taken at the same
sampling point unless conditions make another sampling point more
representative of each source or treatment plant.
(b)
SOC Surface Water Monitoring
Protocols. Surface water systems [
Note:
For purposes of 310 CMR
22.07A(2)(b), surface water systems include systems
with a combination of surface and ground sources.) shall take a minimum of one
sample at points in the distribution system that are representative of each
source or at each entry point to the distribution system after treatment
(sampling point). Each sample must be taken at the same sampling point unless
conditions make another sampling point more representative of each source or
treatment plant.
(c)
Multiple Sources. If the system draws water from more
than one source and the sources are combined before distribution, the system
must sample at an entry point to the distribution system during periods of
normal operating conditions (i.e., when water representative
of all sources is being used).
(d)
Consecutive System Monitoring. Public water systems
that obtain water from another public water system are exempt from conducting
compliance monitoring for the purchased portion of the system for the organic
chemicals (SOC) under 310 CMR
22.07A, provided that the system from which the
water is obtained has conducted the analyses required under 310 CMR
22.07A,
unless otherwise specified by the Department.
(3)
SOC Monitoring
Frequency.
(a) Each community and
non-transient non-community water system shall take four consecutive quarterly
samples for each contaminant listed in 310 CMR
22.07A(1) during each compliance
period beginning with the compliance period starting January 1, 1993.
(b) Systems serving more than 3,300 persons
which do not detect a contaminant in the initial compliance period, may reduce
the sampling frequency to a minimum of two quarterly samples in one year during
each repeat compliance period.
(c)
Systems serving less than or equal to 3,300 persons which do not detect a
contaminant in the initial compliance period may reduce the sampling frequency
to a minimum of one sample during each repeat compliance period.
(4)
SOC Sampling
Waivers. Each community and non-transient water system may apply
to the Department for a waiver from the requirement of 310 CMR
22.07A(3). A
system must reapply for a waiver for each compliance period.
Basis of an SOC Sampling Waiver. The
Department may grant a waiver after evaluating the following factor(s):
Knowledge of previous use (including transport, storage, or disposal) of the
contaminant within the watershed or zone of influence of the system. If a
determination by the Department reveals no previous use of the contaminant
within the watershed or Zone II or IWPA, a waiver may be granted. If previous
use of the contaminant is unknown or it has been used previously, then the
following factors shall be used to determine whether a waiver is
granted.
(a) Previous analytical
results.
(b) The proximity of the
system to a potential point or non-point source of contamination. Point sources
include spills and leaks of chemicals at or near a water treatment facility or
at manufacturing, distribution, or storage facilities, or from hazardous and
municipal waste landfills and other waste handling or treatment facilities.
Non-point sources include the use of pesticides to control insect and weed
pests on agricultural areas, forest lands, home and gardens, and other land
application uses.
(c) The
environmental persistence and transport of the pesticide or PCBs.
(d) How well the water source is protected
against contamination due to such factors as depth of the well and the type of
soil and the integrity of the well casing and other protective measures
considered relevant by the Department.
(e) Elevated nitrate levels at the water
supply source.
(f) Use of PCBs in
equipment used in the production, storage, or distribution of water (i.e., PCBs
used in pumps, transformers, etc.).
(5)
Detection of an
SOC. If an organic contaminant listed in 310 CMR
22.07A(1) is
detected (as defined by 310 CMR
22.07A(16) in any sample, then:
(a) Each system shall report to the
Department within seven days and shall monitor quarterly at each sampling point
which resulted in a detection.
(b)
The Department may decrease the quarterly monitoring requirement specified in
310 CMR
22.07A(5)(a) provided it has determined that the system is reliably and
consistently below the maximum contaminant level. In no case shall the
Department make this determination unless a groundwater system takes a minimum
of two quarterly samples and a surface water system takes a minimum of four
quarterly samples.
(c) After the
Department determines the system is reliably and consistently below the maximum
contaminant level the Department may allow the system to monitor annually.
Systems which monitor annually must monitor during the quarter that previously
yielded the highest analytical result.
(d) Systems which have three consecutive
annual samples with no detection of a contaminant may apply to the Department
for a waiver as specified in 310 CMR
22.07A(4).
(e) If monitoring results in detection of one
or more of certain related contaminants (heptachlor, heptachlor epoxide), then
subsequent monitoring shall analyze for all related contaminants.
(6)
MCL Violation and
Reliably/consistently below the MCL. Systems which violate the
requirements of 310 CMR
22.07A(1) as determined by 310 CMR
22.07A(9) must
monitor quarterly. After a minimum of four quarterly samples show the system is
in compliance and the Department determines the system is reliably and
consistently below the MCL, as specified in 310 CMR
22.07A(9), the system shall
monitor at the frequency specified in 310 CMR
22.07A(5)(c).
(7)
SOC Confirmation
Sampling. The Department may require a confirmation sample for
positive or negative results. If a confirmation sample is required by the
Department, the result must be averaged with the first sampling result and the
average used for the compliance determination as specified by 310 CMR
22.07A(9). The Department has discretion to delete results of obvious sampling
errors from this calculation.
(8)
Composite SOC Sampling. The total number of samples
which must be analyzed may be reduced by compositing samples. Composite samples
from a maximum of five sampling points are allowed provided that the detection
limit of the method used for analysis is less than one-fifth of the MCL and
none of the samples to be composited are representative of multiple sources.
Compositing of samples must be approved by the Department and must be done in
the laboratory and analyzed within the holding times specified by
EPA-814B-92-002, Change 2 - September 1992
Manual for the Certification
of Laboratories Analyzing Drinking Water, third edition. Compositing
of sources with previous detections greater than the detection limit is not
allowed, unless otherwise authorized by the Department.
(a) If the concentration in the composite
sample exceeds the detection limit for one or more contaminants listed in 310
CMR
22.07A(1), then a follow-up sample must be taken and analyzed from each
sampling point included in the company within 14 days after completion of the
composite analysis or before the holding time of the initial sample is
exceeded, whichever is sooner.
(b)
If duplicates of the original sample taken from each sampling point used in the
composite are available, the system may use these duplicates instead of
resampling. The duplicate must be analyzed and the results reported to the
Department within 14 days of collection.
(c) If the population served by the system is
>3,300 persons, then compositing may only be permitted by the Department at
sampling points within a single system. In systems serving <=3,300 persons,
the Department may permit compositing among different systems provided the
5-sample limit is maintained.
(9)
SOC Compliance
Calculations. Compliance with 310 CMR
22.07A(1) shall be
determined based on the analytical results obtained at each sampling point. If
one sampling point is in violation of an MCL, the system is in violation of the
MCL.
(a)
Greater than
Annual. For systems monitoring more than once per year, compliance
with the MCL is determined by a running annual average at each sampling
point.
(b)
Annual or
Less. Each supplier of water monitoring annually or less
frequently whose sample result exceeds the regulatory detection level as
defined by 310 CMR
22.07A(16) must begin quarterly sampling. The system will
not be considered in violation of the MCL until it has completed one year of
quarterly sampling.
(c) If any
sample result will cause the running annual average to exceed the MCL at any
sampling point, the system is out of compliance with the MCL
immediately.
(d) If a supplier of
water fails to collect the required number of samples, compliance will be based
on the total number of samples collected.
(e) If a sample result is less than the
detection limit, zero will be used to calculate the annual average.
(f)
Average Exceeding SOC
MCLs. When the average of four analyses made pursuant to 310 CMR
22.07A(5), rounded to the same number of significant figures as the maximum
contaminant level for the substance in question, exceeds the maximum
contaminant level, the supplier of water shall report to the Department
pursuant to 310 CMR
22.15 and give public notice to the public pursuant to 310
CMR
22.16. Monitoring after public notification shall be at a frequency
designated by the Department and shall continue until the maximum contaminant
level has not been exceeded in two successive samples or until a monitoring
schedule as condition to variance, exemption or enforcement action shall become
effective.
(10)
SOC Analytical Methods. Analysis for the contaminants
listed in 310 CMR
22.07A(1) shall be conducted using the following EPA methods
or their equivalent as approved by EPA. Methods 508A and 515.1 are contained in
Methods for the Determination of Organic Compounds in Drinking
Water, EPA-600/4-88-039, December 1988, Revised, July 1991, Methods
547, 550 and 550.1 are in,
Methods for the Determination of Organic
Compounds in Drinking Water - Supplement I, EPA/600-4-90-020, July
1990. Methods 548.1, 549.1, 552.1 and 555 are in,
Methods for the
Determination of Organic Compounds in Drinking Water -Supplement II,
EPA/600/R-92/129, August 1992. Methods 502.2, 504.1, 505, 506, 507, 508, 508.1,
515.2, 524.2, 525.2, 531.1, 551.1 and 552.2 are in
Methods for the
Determination of Organic Compounds in Drinking Water - Supplement III,
EPA/600/R-95-131, August 1995. Method 1613 is titled "Tetra-through
Octa-Chlorinated Dioxins and Furans by Isotope-Dilution HRGC/HRMS",
EPA/821-B-94-005, October 1994. These documents are available from the National
Technical Information Service, NTIS PB91-231480, PB91-146027, PB92-27703,
PB95-261616 and PB95-104774 (respectively), U.S. Department of Commerce, 5285
Port Royal Road, Springfield, VA 22161. The phone number is 800-553-6847. The
phone number is 513-569-7586. Method 6610 is contained in
Standard
Methods for the Examination of Water and Wastewater
18
th Edition Supplement, 1994, or with the
19
th edition (1995) or
20
th edition (1998), any of these three editions may
be used. Method 6651 is contained in
Standard Methods for the
Examination of Water and Wastewater 18
th
Edition, (1992), 19
th edition (1995), or
20
th edition (1998); any of these three editions may
be used. The APHA documents are available from American Public Health
Association, 1015 Fifteenth Street NW, Wash., D.C. 20005. Other required
analytical test procedures germane to the conduct of these analyses are
contained in Technical Notes on Drinking Water Methods, EPA/600/R-94-173,
October 1994, NTIS PB95-104766. EPA Methods 515.3 and 549.2 are available from
U.S. Environmental Protection Agency, National Exposure Research Laboratory
[NERL]-Cincinnati, 26 West Martin Luther King Drive, Cincinnati, OH 45268 ASTM
Methods D 5317-93, 98 (Reapproved 2003) is available in the Annual Book of ASTM
Standards, (1999), Vol. 11.02, ASTM International, 100 Barr Harbor Drive, West
Conshohocken, PA 19428, any edition containing the cited version of the methods
may be used. EPA Methods 515.4, "Determination of Chlorinated Acids in Drinking
Water by Liquid-Liquid Microextraction, Derivatization and Fast Gas
Chromatrography with Electron Capture Detection", Revision 1.0, April 2000,
EPA/815/B-00/001 and EPA Methods 552.3, "Determination of Haloacetic Acids and
Dalapon in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and
Gas Chromatography with Electron Capture Detection", Revision 1.0, July 2003,
EPA 815-B-03-002, can be accessed and downloaded directly online at
http://www.epa/gov/safewater/methods/sourcalt.html [File Link Not Available].
Syngenta Method AG-625, "Atrazine in Drinking Water by Immunoassay", February
2001, is available from Syngenta Crop Protection, Inc., 410 Swing Road, P.O.
Box 18300, Greensboro, NC 27419. Telephone: 336-632-6000. Method 531.2
"Measurement of N-methylcarbamoyloximes and N-methylcarbamoyloximes and
N-methylcarbamates in Water by Direct Aqueous Injection HPLC with Postcolumn
Derivatization", Revision 1., September 2001, EPA 815-B-01-002, can be accessed
and downloaded directly online at
http://www.epa.gov/safewater/methods/sourcult.htnml.
|
Contaminant
|
EPA Method
|
SM
|
ASTM
|
Other
|
|
2,3,7,8-TCDD(dioxin)
|
1613
|
|
2,4-D3 (as acid, salts and
esters)
|
515.2, 555, 515.1, 515.3, 515.4
|
D5317-93,98 (Reapproved 2003).
|
|
2,4,5-TP3 (Silvex)
|
515.2, 555, 515.1, 515.3, 515.4
|
D5317-93, 98 (Reapproved 2003).
|
|
Alachor1
|
505, 507, 525.2, 508.1, 551.1
|
|
Atrazine1
|
505, 507, 525.2, 508.1, 551.1
|
Syngenta AG-6254
|
|
Benzo(a)pyrene
|
525.2, 550, 550.1
|
|
Carbofuran
|
531.1, 531.2
|
6610
|
|
Chlordane
|
505, 508, 525.2, 508.1
|
|
Dalapon
|
552.1, 515.1, 515.3, 552.2, 515.4
|
|
Di(2-ethylhexyl)adipate
|
506, 525.2
|
|
Di(2-ethylhexyl)phthalate
|
506, 525.2
|
|
Dibromochloropropane (DBCP)
|
504.1, 551.1
|
|
Dinoseb3
|
515.2, 555, 515.1, 515.3, 515.4
|
|
Diquat
|
549.2
|
|
Endothall
|
548.1
|
|
Endrin
|
505, 508, 525.2, 508.1, 551.1
|
|
Ethylene dibromide (EDB)
|
504.1, 551.1
|
6651
|
|
Glyphosate
|
547
|
|
Heptachlor
|
505, 508, 525.2, 508.1, 551.1
|
|
Heptachlor Epoxide
|
505, 508, 525.2, 508.1, 551.1
|
|
Hexachlorobenzene
|
505, 508, 525.2, 508.1, 551.1
|
|
Hexachloro-cyclopentadiene
|
505, 508, 525.2, 508.1, 551.1
|
|
Lindane
|
505, 508, 525.2, 508.1, 551.1
|
|
Methoxychlor
|
505, 508, 525.2, 508.1, 551.1
|
|
Oxamyl
|
531.1, 531, 2
|
6610
|
|
PCBs(as
decachlorobiphenyl)2
|
508A
|
|
PCBs (as Aroclors)2
|
505, 508, 508.1, 525.2
|
|
Pentachlorophenol
|
515.2, 525.2, 555, 515.1, 515.3, 515.4
|
D5317-93, 98 (Reapproved 2003).
|
|
Picloram3
|
515.2, 555, 515.1, 515.3, 515.4
|
D5317-93, 98 (Reapproved 2003).
|
|
Simazine1
|
505, 507, 525.2, 508.1, 551.1
|
|
Toxaphene
|
505, 508, 508.1, 525.2
|
Footnotes
1 Substitution of the detector
specified in Methods 505, 507, 508, or 508.1 for the purpose of achieving lower
detection limits is allowed as follows. Either an electron capture or nitrogen
phosphorus detector may be used provided all regulatory requirements and
quality control criteria are met.
2 PCBs are qualitatively identified
as Arolcolrs and measured for compliance purposes as decachlorobiphenyl. Users
of Method 505 may have more difficulty in achieving the required detection
limits than users of Methods 508.1, 525.2, or 508.
3 Accurate determination of the
chlorinated esters requires hydrolysis of the sample as described in EPA
Methods 515.1, 515.2, 515.3, 515.4 and 555 and ASTM Methods D5317-93,98
(Reapproved 2003).
4 This method may not be used for
the analysis of atrazine in any system where chlorine dioxide is used for
drinking water treatment. In samples from all other systems, any result for
atrazine generated by Method AG-625 that is greater than 1/2 the maximum
contaminant level (MCL) (in other words, greater than 0.0015mg/L or 1.5 ug/L)
must be confirmed using another approved method for this contaminant and should
use additional volume of the original sample collected for compliance
monitoring. In instances where a result from Method AG-625 triggers such
confirmatory testing, the confirmatory result is to be used to determine
compliance.
(11)
Analysis for PCBs shall be conducted as follows:
(a) Each system that monitors for PCBs shall
analyze each sample using either Method 508.1, 525.2, 508 or 505. The mean of
the method detection limits of all Aroclors shall be 0.00025mg/l except for
Aroclor 1221 which is 0.02 mg/l. Users of Method 505 may have more difficulty
in achieving the required Aloclor detection limits than using methods 508.1,
525.2 or 508.
1. A lab may conduct a scan for
Aroclors using any one of the four methods mentioned in 310
22.07A(11)(a).
2. A lab that is
certified for any of the four methods listed in 310 22.07A(11)(a) is eligible
to conduct the scan for Aroclors.
(b) If PCBs (as one of seven Aroclors) are
detected as designated in 310 CMR
22.07A(11)(a) the system shall reanalyze the
sample using Method 508A to quantitate PCBs (as decachlorobiphenyl).
(c) Compliance with the PCB MCL shall be
determined based upon the quantitative results of analyses using Method
508A.
(12)
Grandfathered SOC Data: The Department may allow the
use of monitoring data collected after January 1, 1990, for purposes of
satisfying the initial monitoring requirement of 310 CMR
22.07A(2), if in the
opinion of the Department, the data are generally consistent with the
requirements of 310 CMR
22.07A(2). A single sample rather than four quarterly
samples may be allowed by the Department to satisfy the monitoring requirement
for the initial compliance period beginning January 1, 1993.
(13)
Increased SOC
Sampling: The Department may increase the required monitoring
frequency, where necessary, to detect variations within the system
(e.g., fluctuations in concentration due to seasonal use,
changes in water source).
(14)
Enforcement: The Department has the authority to
determine compliance or initiate enforcement action based upon analytical
results and other information compiled by their sanctioned representatives and
agencies.
(15)
Designated Sampling Schedules: Each public water
system shall monitor at the time designated by the Department within each
compliance period.
(16)
SOC Detection Limits: Detection as used in 310 CMR
22.07A(5) shall be defined as greater than or equal to the following
concentrations for each contaminant. (Please refer to the Guidelines and
Policies for further information regarding detection limits).
|
SOC DETECTION LIMITS
|
|
Contaminant
|
Detection Limit mg/l
|
|
Alachlor
|
0.0002
|
|
Aldicarb
|
0.0005
|
|
Aldicarb sulfoxide
|
0.0005
|
|
Aldicarb sulfone
|
0.0008
|
|
Atrazine
|
0.0001
|
|
Benzo(a)pyrene
|
0.00002
|
|
Carbofuran
|
0.0009
|
|
Chlordane
|
0.0002
|
|
Dalapon
|
0.001
|
|
Dibromochloropropane (DBCP)
|
0.00002
|
|
Di (2-ethythexyl) adipate
|
0.0006
|
|
Di (2-ethylhexyl) phthalate
|
0.0006
|
|
Dinoseb
|
0.0002
|
|
Diquat
|
0.0004
|
|
2,4-D
|
0.0001
|
|
Endothall
|
0.009
|
|
Endrin
|
0.00001
|
|
Ethylene dibromide (EDB)
|
0.00001
|
|
Glyphosate
|
0.006
|
|
Heptachlor
|
0.00004
|
|
Heptachlor epoxide
|
0.00002
|
|
Hexachlorobenzene
|
0.0001
|
|
Hexachlorocyclopentadiene
|
0.0001
|
|
Lindane
|
0.00002
|
|
Methoxychlor
|
0.0001
|
|
Oxamyl
|
0.002
|
|
Picloram
|
0.0001
|
|
Polychlorinated biphenyls (PCBs) (as
decachlorobiphenyl)
|
0.0001
|
|
Pentachlorophenol
|
0.00004
|
|
Simazine
|
0.00007
|
|
Toxaphene
|
0.001
|
|
2,3,7,8-TCDD (Dioxin)
|
0.000000005
|
|
2,4,5-TP (Silvex)
|
0.0002
|
(17)
SYNTHETIC ORGANIC BATs. The EPA Administrator,
pursuant to the federal Safe Drinking Water Act, § 1412, has identified as
indicated in the Table below either granular activated carbon (GAC), packed
tower aeration (PTA), or oxidation (OX) as the best technology, treatment
technique, or other means available for achieving compliance with the maximum
contaminant level for organic contaminants identified in 310 CMR
22.07A(1):
BAT FOR ORGANIC CONTAMINANTS LISTED IN 310 CMR 22.07A(1)
|
CAS #
|
Chemical
|
GAC
|
PTA
|
OX
|
|
15972-60-8
|
Alachlor
|
X
|
|
116-06-3
|
Aldicarb
|
X
|
|
1646-88-4
|
Aldicarb sulfone
|
X
|
|
1646-87-3
|
Aldicarb sulfoxide
|
X
|
|
1912-24-9
|
Atrazine
|
X
|
|
50-32-8
|
Benzo[a)pyrene
|
X
|
|
1563-66-2
|
Carbofuran
|
X
|
|
57-74-9
|
Chlordane
|
X
|
|
75-99-0
|
Dalapon
|
X
|
|
96-12-8
|
Dibromochloropropane (DBCP)
|
X
|
X
|
|
75-09-2
|
Dichloreomethane
|
X
|
|
103-23-1
|
Di (2-ethylhexyl) adipate
|
X
|
X
|
|
117-81-7
|
Di (2-ethylhexyl) phthalate
|
X
|
|
88-85-7
|
Dinoseb
|
X
|
|
85-00-7
|
Diquat
|
X
|
|
94-75-7
|
2,4-D
|
X
|
|
72-20-8
|
Endrin
|
X
|
|
145-73-3
|
Endothall
|
X
|
|
106-93-4
|
Ethylene Dibromide (EDB)
|
X
|
X
|
|
1071-583-6
|
Glyphosate
|
X
|
|
76-44-8
|
Heptachlor
|
X
|
|
1024-57-3
|
Heptachlor epoxide
|
X
|
|
118-74-1
|
Hexachlorobenzene
|
X
|
|
77-47-3
|
Hexachlorocyclopentadiene
|
X
|
X
|
|
58-89-9
|
Lindane
|
X
|
|
72-43-5
|
Methoxychlor
|
X
|
|
1336-36-3
|
Polychlorinated biphenyls(PCB)
|
X
|
|
23135-22-0
|
Oxamyl (Vydate)
|
X
|
|
87-86-5
|
Pentachlorophenol
|
X
|
|
1918-02-1
|
Picloram
|
X
|
|
93-72-1
|
2,4,5-TP (Silvex)
|
X
|
|
122-34-9
|
Simazine
|
X
|
|
120-82-1
|
1,2,4-Trichlorobenzene
|
X
|
X
|
|
79-00-5
|
1,1,2-Trichloroethane
|
X
|
X
|
|
1746-01-6
|
2,3,7,8-TCDD(Dioxin)
|
X
|
|
8001-35-2
|
Toxaphene
|
X
|
X
|
(18)
New Systems/Sources. Each new supplier of water or
supplier of water that uses a new source of water that begins operation after
January 22, 2004 must demonstrate compliance with the MCL within a period of
time specified by the Department. The supplier of water must also comply with
the initial sampling frequencies specified by the Department to ensure a system
can demonstrate compliance with the MCL. Routine and increased monitoring
frequencies shall be conducted in accordance with the requirements in 310 CMR
22.07A.
