Office of Drinking Water
Environmental Protection Aggncv
August 19R7
SUBSTITUTES AND REPLACEMENTS FOR SUBSTANCES
ON THE ORIGINAL LIST OF 83
Schedule
o Signed by the Administrator on June 19, 1987
o Published in the Federal Register on July 8, 1987
Substitutes
• 7 substitutes allowed
• Criteria for selection
- Are there sufficient health effects data upon which to select
an MCLG?
- Are there ootential adverse health effects from exposure to the
contaminant via ingestion?
- Does the contaminant occur in drinking water?
- Has the contaminant been detected in significant freouencies
and in a widespread manner?
- If data are limited on the frequency and nature of
contamination, Is there a significant potentJal for drinking
water contamination?
• Candidates for Removal
- Zinc
- Silver
Sodium
- Aluminum
Molybdenum
Vanadium
Dibromomethane
• In addition* listed for public comment are*
- Sulfate
- Phthalates
- 1,1,2-Trichloroethane
• Candidates for Addition
- Aldicarb sulfoxlde
- Aldicarb sulfone
Ethylbenzene
Heptachlor
Peptachlor epoxide
Styrene
- Nitrite
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Office of Drinking Water
Environmental Protection Agency
August 1987
SCHEDULE
o ANPRM March 4, 1982 (47 FR 9350)
o Proposed MCLGs June 12, 1984 (49 FR 24330)
o Final MCLGs, proposed MCLs, Monitoring Nov. 13, 1985
o November 13, 1985 Federal
— Extension of public comment period for 45 days on
tetrachioroethylene MCLG.
— N’TP Report recently released
o Public Briefing: December 19, 1985 Washington. D.C.
o Public nearing: January 13—14. 1986 Washington, D.C.
o Reproposed MCLG and proposed MCL for pars—dichlorobenz.n.:
April 17, 1987
o PublIc Hearing:
o Promulgation:
SUMMARY OF THE FINAL VOC MCLs AND MONITORING REQUIREMENTS :
VOLATILE ORGANIC COMPOUNDS (VOC. )
May 4, 1987
July 8, 1987
(Signature date:
June 19, 1987)
VOCs: Final MCLGs and MCLi (in mg/i )
Final Final
NCLG MCL
Trichioroethylene zero - 0.005
Carbon Tetrachioride zero 0.005
Vinyl Chloride sire 0.002
1,2-Dichloro.than. zero 0.005
Benzene zero 0.005
para—Dichiorobansene 0.075 0.075
l,l —Dichlaro.thyi.ne 0.007 0.007
1,1,1—Trichiorosthan. 0.2 0.2
Final MCL.Gs were published Nov. 13, 1985. The NCLG and MCL
for p-dichlorobinzene wire reproposed at zero end 0.005 mg/i
on April 17, 1987: comment was requested on levels of 0.075
mg/i and 0.075 mg/i, respectively.
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BAT for 1412 (MCL.s) :
o Packed tower aeration (PTA) and granular activated carbon
(GAC) for the eight VOCs, except vinyl chloride.
o PTA for vinyl chloride.
BAT for 1415 (Variances) :
o Same as BAT for 1412.
Compliance Monitoring :
o Initial Monitoring: All systems must monitor each source
at least once in four year..
— Surface waters: 4 quarterly samples
— Ground waters: 4 quarterly a ples; state can exempt
systems from subs’ quent nonit rina if no VOCs detected
in first sample,
— Cor posite samples of up to five sources allowed
o Phase in by system size (start monitoring: January 1, 1988).
Size Coi’ plete by Date
> 10.000 1 year December 31, 1988
3300—10,000 2 years December 31, 1989
< 3300 4 years December 31, 1991
o Repeat monitoring: varies from quarterly to once per five
years. The frequency is based on whether Cs ar, detected in
the first round of monitoring and vhsther system is vulnerable
to contamination.
Analytical Msthodsz CC or CC/MS
o Methods 504, 502.1, 503.1, 524.1, 524.2. 502.2
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Laboratory Certification Criteria :
o Seven VOCg: + 20% > 0.004 mg/i
40% < 0.004 mg/i
o Vinyl Chloride: ± 40% < 0.004 mg/i
Non-transient Non—community Water Systems (NTNCWS) :
o Non—community water systems which regularly ssrv. at l.ast 25
of the same persons over 6 months p.r y.ar (i... NTNCWS) are
required to meet all requirements in this rule.
Point—of—Entry (POE), Point—of—tise (POU), and Bottled Water :
o POE may be used to achieve complianc, with MCL.s but is not BAT.
o POU and bottled water cannot be used to meet MCLs.
Variances and Exceptions
o As a condition of issuinq a variance or exemption, states have
the authority to require the water system to implement additional
interim control measures. If an unreasonable risk to health
exists, the state must require either installation of point—of—use
devices or distrt ution of bottled water to each customer.
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Office of Drinking Water
Environmental Protection Aaency
Au ugt 1987
MONITORING FOR SECTION 1445 (UNREGULATED) CONTAMINANTS
Schedule:
o NPR.M —— November 13, 1985
o Promulgation — July 8, 1987
(Included in the VOC packag.)
Summary:
o 51 contaminants were publish.d (S.. Table 1)
o Requirer’ents for contaminant monitoring established
by availability and cost of analytical methods as
follows:
List 1 — Reguired monitoring by all systems
(34 substances)
List 2 — Required for “ulnerable systems
(2 substances)
List 3 — Required at stat. discretion
(15 substances)
o Systems may grandfather acc.ptabl. data collected
anytime after January 1, 1983 if consistent with
the current rut..
o Compositing of up to S samples is p.rmitted.
o Instead of monitoring, systems with fever than 150
connections may sind a letter to the State
specifying that their syste. is available for sampling.
However, we encourage them to actually perform the analyses
along with the compliance monitoring r•quir.d for the
VOC MCLs.
o Estimated cost is about $200 per analysis for compliance
and monitoring
o EPA will produce a new list every 5 years
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UPREGULATED CONTAMINANTS PUBLISHED WITH VOC RULE
Table 1
List 1 — All systems must monitor for:
(1) (18) 1,1—Dichioroethane
(2) (19) 1,2—Dichioropropane
(3) (20) 1,1,2,2—T.trachloroethane
(4) (21) !thylb.nz.n.
(5) (22) 1,3—Djch3oropropane
(6) (23) Styr.ri.
(7) (24) Chioromethane
(8) (25) Broaom.thane
(9) (26) 1,2,3 —Trteh loropropane
(10) (27) 1,1,1,2 —Tstrach loroethan.
(11) (28) Chloresthane
(12) (29) 1,1,2 —Trict’*loroethan.
(13) (30) 2,2—Dichioropropan.
(14) (31) o—Chlorotoluen.
(15) (32) p -Chlorotoluene
(16) (33) Bromobensene
(17) (34) 1,3—Dichioropropene
List 2 —— Vulnerable systems must monitor for:
(1) Ethylene dibromide (EDB) U)
(2) 1.2-Dibromo-3ch loropropafle (DBCP)
List 3 —— Systems must monitor at Stat. discrection for:
(1) (8) 1,3.5—Trim .thylbenzene
(2) (9) p-Isopropyltoluene
(3) (10) Isopropylben*Sfle
(4) (1]) Tsrt —butylbinzeni
(5) (12) S.c—butylbenz ine
(6) (13) Vluorotrichleromitharte
(7) (14) DichlorodifluorOalthane
(15) Bro.ochloromithafle
Ch lorof arm
Bromodi chioromethane
Chiorod ibromomethane
Bromof arm
trans—i ,2—Dichloro.thyl.n.
Ch 1 oroben zen.
m—Dich lorob .nz.ne
Dich loromethane
ci a—i , 2—Dichloro.thylene
o—Dich lorobenzene
Dibromomethane
1, 1—Dichloropropene
Tetrach loroethy lene
Toluene
p-Xy lene
o-Xy lene
ri-Xy lene
1,2. 4 —Trimithylb•nzene
1, 2. 4 —Trichlorob.nzsris
1, 2, 3 -Trichlorobenzens
n-Propy lbsnzeni
n-Buty lb.nzefli
Naphtha line
H.zach lorobutadien .
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Office of Drjnkjru Water
Environmental Protection Aqency
August 1987
DRINKING WATER PRIORITY LIST (DWPL)
• Schedule
— Published on July 8. 1987
— Final noice will be published in December 1987
• Criteria for selection
— Occurrence or potential occurrence in drinking water
— Adverse health effects
— Sufficient data available to set MCLG and MCL
• Lists from which substances were taken to co, il. the DWPL
— 7 contaminants sutstttuted out of hit of 83
— Di5infectants and disinfection by—products
— :i • .. _ .
— P ticides included in the National Peiticides Survey
— tDCs in unre’?ulated VOC monitoring rule
- Other contaminants found in vsrlous surveys
• Drin’cing Water Priority List W4PL)
-I
Zinc
Silver
Sodium
Alu’iii num
M lybder%u’ %
Vanadium
Di bromom. than•
Chlorin•
Kypochiorite ton
Chlorine dioxide
Chlorite
Chlorami ri.
Ammonia
TrihalometPian•s (chloroform,
dibromochlorom.thari., bro ao-
diePtioromethane, bromoform)
Ch 1 oroph.nols
Halonitriles
Selected disinfection r.lat.d
c 1orinated acids, alcohols,
aldehydes, and ketones
Chlorooicr in
2,4—Dinitrotoluene
1, 3—Dichioroproparte
Broiaobenz.rt .
Chioromethane
Bromome than.
1,2, 3—Trichioroproparte
1,1,1, 2 —Tstracliloro.thane
Ca loroe than.
2, 2—DichieroproDane
o —c hloroto lusn .
p-ch lorotoluens
h.xachlorobsrtzlfl•
hsxach lorosthafll
h.xachlorobutadtsn*
1, i’d ichioropropefle
2,4S —T
I sophorons
Ethylene thioursa
Boron
Stront ium
Cryptosporidium
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