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 ------- 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. ------- —2— 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 ------- —3— 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. ------- 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 ------- 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 . ------- 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 ------- |