-
ORR # 2002-022
DEPARTMENT OF ENVIRONMENTAL QUALITY DRINKING WATER AND RADIOLOGICAL PROTECTION DIVISION
SUPPLYING WATER TO THE PUBLIC
Filed with the Secretary of State on
These rules take 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 325.10604a and R 325.605 of the Michigan Administrative Code are amended, and R 325.610, R 325.610a, R 325.610b, R 325.610c, R 325.611, R 325.611a, and R 325.611b are added to the Code as follows:
PART 6. STATE DRINKING WATER STANDARDS AND ANALYTICAL TECHNIQUES
R 325.10604a
MCL for total trihalomethanes.DISINFECTION FOR PHOSPHATE OR IRON REMOVAL TREATMENT SYSTEMS.Rule 604a.
The MCL for total trihalomethane for all type I public water supplies that add a disinfectant to thewater as a normal part of the treatment system shall be 0.10 milligrams per liter.DISINFECTION SHALL BE PROVIDED FOR PUBLIC WATER SUPPLIES THAT EMPLOY PHOSPHATE TREATMENT SYSTEMS OR CERTAIN IRON REMOVAL TREATMENT SYSTEMS.R 325.10605 Analytical techniques and sample collection procedures;
incorporationADOPTION by reference.Rule 605. The analytical techniques and sample collection procedures used in the determination of compliance with the STATE drinking water standards for microbiological contaminants, inorganic chemical contaminants, organic chemical contaminants, including maximum TTHM potential, turbidity, residual disinfectants, DISINFECTION BYPRODUCTS, DISINFECTION BYPRODUCT PRECURSORS, temperature, pH,
conductivity, alkalinity, and radioactivity which are contained in 40 C.F.R. parts 141 and 143, (2001, 2000, 1999
, 1995), and which have been promulgated by the United States EPA under authority of the safe drinking water act of 1974 (public law 93-523), the safe drinking water act amendments of 1986 (public law 99-339), and the safe drinking water act amendments of 1996 (public law 104-182), 42 U.S.C. 300F et seq. are adopted by reference in these rules.Copies of the adopted matter are available for inspection at the offices ofthe department at 3423 North Martin Luther King Jr. Blvd., Lansing. Copies of the adopted material may beobtained from the Superintendent of Documents, United States Government Printing Office, Post OfficeBox 371954, Pittsburgh, PA 15250-7954, telephone (202) 512-1800, or the Department ofEnvironmental Quality, Drinking Water and Radiological Protection Division, Post Office Box 30630, Lansing,Michigan 48909-8130. The cost as of the time of adoption of these rules is $37.00. The adopted material isalso available athttp://www.access.gpo.gov/su_docs.$56.00 AT THE TIME OF ADOPTION OF THESE RULES. THE ADOPTED MATERIAL IS AVAILABLE FOR INSPECTION, OR COPIES ARE AVAILABLE AT NO COST FROM THE OFFICES OF THE DEPARTMENT AT THE ADDRESS IN R 325.10116(a).
R 325.10610 MCLS FOR DISINFECTION BYPRODUCTS.
RULE 610. (1) THE MAXIMUM CONTAMINANT LEVELS (MCLS) FOR DISINFECTION BYPRODUCTS ARE AS FOLLOWS:
DISINFECTION BYPRODUCT MCL (MG/L)
TOTAL TRIHALOMETHANES (TTHM) 0.080/0.10 *
HALOACETIC ACIDS (FIVE) (HAA5) 0.060 BROMATE 0.010
CHLORITE 1.0
* THE MCL OF 0.080 MG/L FOR TTHM IS EFFECTIVE JANUARY 1, 2002, FOR SUBPART H SYSTEMS SERVING 10,000 OR MORE PEOPLE. THE MCL OF 0.10 MG/L FOR TTHM IS IN EFFECT UNTIL JANUARY 1, 2004, FOR ALL OTHER COMMUNITY WATER SYSTEMS THAT ADD A DISINFECTANT TO THE WATER AS A NORMAL PART OF THE TREATMENT PROCESS. COMPLIANCE WITH THE 0.10 MG/L TTHM MCL SHALL BE DETERMINED BASED ON A RUNNING ANNUAL AVERAGE OF QUARTERLY SAMPLES COLLECTED UNDER R325.10719b OR R 325.10719c(1). BEGINNING JANUARY 1, 2004, THE MCL WILL BE 0.080 MG/L FOR SYSTEMS SUBJECT TO THIS RULE AND THE COMPLIANCE REQUIREMENTS WILL BE ACCORDING TO R 325.10610b. BEGINNING JANUARY 1, 2004, THE TOTAL TRIHALOMETHANES MCL OF 0.10 MG/L AND THIS FOOTNOTE WILL NO LONGER APPLY.
(2) EXCEPT FOR THE MCL OF 0.10 MG/L FOR TTHM, THIS RULE, R 325.10610a, R325.10610b, R 325.10610c, R 325.10719e, AND R 325.10719f APPLY TO COMMUNITY AND NONTRANSIENT NONCOMMUNITY WATER SYSTEMS THAT ADD A CHEMICAL DISINFECTANT TO THE WATER IN ANY PART OF THE DRINKING WATER TREATMENT PROCESS AND TO TRANSIENT NONCOMMUNITY WATER SYSTEMS ADDING CHLORINE DIOXIDE. TRANSIENT NONCOMMUNITY WATER SYSTEMS ARE ONLY REQUIRED TO COMPLY WITH THE CHLORINE DIOXIDE REQUIREMENTS. THIS RULE, R325.10610a, R 325.10610b, R325.10610c, R 325.10719e, AND R 325.10719f ARE EFFECTIVE JANUARY 1, 2002, FOR SUBPART H SYSTEMS SERVING 10,000 OR MORE PEOPLE, AND BECOME EFFECTIVE JANUARY 1, 2004, FOR OTHER SYSTEMS SUBJECT TO THIS RULE.
R 325.10610a MAXIMUM RESIDUAL DISINFECTANT LEVELS.
RULE 610a. (1) MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLS) ARE AS FOLLOWS:
DISINFECTANT RESIDUAL MRDL (MG/L)
CHLORINE 4.0 AS CHLORINE
CHLORAMINES 4.0 AS CHLORINE CHLORINE DIOXIDE 0.8 AS CHLORINE DIOXIDE
(2) THIS RULE APPLIES AS SPECIFIED IN R 325.10610(2).
(3) SUPPLIERS MAY INCREASE RESIDUAL DISINFECTANT LEVELS IN THE DISTRIBUTION SYSTEM OF CHLORINE OR CHLORAMINES, BUT SHALL NOT INCREASE THE LEVELS OF CHLORINE DIOXIDE, TO A LEVEL AND FOR A TIME NECESSARY TO PROTECT PUBLIC HEALTH TO ADDRESS SPECIFIC MICROBIOLOGICAL CONTAMINATION PROBLEMS CAUSED BY CIRCUMSTANCES SUCH AS, BUT NOT LIMITED TO, DISTRIBUTION LINE BREAKS, STORM RUN-OFF EVENTS, SOURCE WATER CONTAMINATION EVENTS, OR CROSS-CONNECTION EVENTS.
R 325.10610b DISINFECTANT RESIDUALS, DISINFECTION BYPRODUCTS, AND DISINFECTION BYPRODUCT PRECURSORS; COMPLIANCE REQUIREMENTS.
(1) THIS RULE APPLIES AS SPECIFIED IN R 325.10610(2). COMPLIANCE WITH THIS RULE IS BASED ON ALL OF THE FOLLOWING:
(a) ALL SAMPLES TAKEN AND ANALYZED UNDER R 325.10605, R 325.10610, R 325.610a, THIS RULE, R 325.10610c, R 325.10719e, AND R 325.10719f SHALL BE INCLUDED IN DETERMINING COMPLIANCE.
(b) IF, DURING THE FIRST YEAR OF MONITORING UNDER R 325.10719e, ANY INDIVIDUAL QUARTER'S AVERAGE WILL CAUSE THE RUNNING ANNUAL AVERAGE OF THAT SYSTEM TO EXCEED THE MCL, THE SYSTEM IS OUT OF COMPLIANCE AT THE END OF THAT QUARTER.
(c) A SYSTEM IS IN VIOLATION OF THE STATE DRINKING WATER STANDARD IF COMPLIANCE IS BASED ON 4 CONSECUTIVE QUARTERS OF MONITORING AND THE AVERAGE OF SAMPLES, OR QUARTERLY AVERAGES, OR RUNNING ANNUAL AVERAGES, WHICHEVER IS APPLICABLE, EXCEEDS THE STATE DRINKING WATER STANDARD, UNLESS OTHERWISE NOTED IN THIS RULE.
(d) WHERE COMPLIANCE IS BASED ON A RUNNING ANNUAL AVERAGE OF MONTHLY OR QUARTERLY SAMPLES OR AVERAGES AND THE SUPPLIER FAILS TO COMPLETE 4 CONSECUTIVE QUARTERS OR 12 CONSECUTIVE MONTHS OF MONITORING, WHICHEVER IS APPLICABLE, COMPLIANCE WITH THE MCL FOR THE LAST 4 QUARTER COMPLIANCE PERIOD IS BASED ON AN AVERAGE OF THE AVAILABLE DATA UNLESS OTHERWISE STATED IN THIS RULE.
(2) COMPLIANCE WITH DISINFECTION BYPRODUCTS REQUIREMENTS IS BASED ON ALL OF THE FOLLOWING:
(a) COMPLIANCE WITH TTHM AND HAA5 REQUIREMENTS ARE BASED ON BOTH OF THE FOLLOWING:
(i) FOR SUPPLIERS MONITORING QUARTERLY, COMPLIANCE WITH MCLS IN R 325.10610 IS BASED ON A RUNNING ANNUAL AVERAGE, COMPUTED QUARTERLY, OF QUARTERLY AVERAGES OF ALL SAMPLES COLLECTED UNDER R 325.10719e(2)(a).
(ii) FOR SUPPLIERS MONITORING LESS FREQUENTLY THAN QUARTERLY, COMPLIANCE IS BASED ON AN AVERAGE OF SAMPLES TAKEN THAT YEAR UNDER R 325.10719e(2)(a) IF THE AVERAGE DOES NOT EXCEED THE MCLS IN R 325.10610. IF THE AVERAGE OF THESE SAMPLES EXCEEDS THE MCL, SUPPLIERS SHALL INCREASE MONITORING TO ONCE
PER QUARTER PER TREATMENT PLANT AND THE SYSTEM IS NOT IN VIOLATION OF THE MCL UNTIL IT HAS COMPLETED 1 YEAR OF QUARTERLY MONITORING, UNLESS THE RESULT OF FEWER THAN 4 QUARTERS OF MONITORING WILL CAUSE THE RUNNING ANNUAL AVERAGE TO EXCEED THE MCL, IN WHICH CASE THE SYSTEM IS IN VIOLATION AT THE END OF THAT QUARTER. SUPPLIERS REQUIRED TO INCREASE MONITORING FREQUENCY TO QUARTERLY MONITORING SHALL CALCULATE COMPLIANCE BY INCLUDING THE SAMPLE WHICH TRIGGERED THE INCREASED MONITORING PLUS THE FOLLOWING 3 QUARTERS OF MONITORING.
(b) COMPLIANCE WITH THE BROMATE REQUIREMENTS IS BASED ON A RUNNING ANNUAL AVERAGE, COMPUTED QUARTERLY, OF MONTHLY SAMPLES, OR, FOR MONTHS IN WHICH THE SYSTEM TAKES MORE THAN 1 SAMPLE, THE AVERAGE OF ALL SAMPLES TAKEN DURING THE MONTH, COLLECTED UNDER R 325.10719e(2)(c).
(c) COMPLIANCE WITH THE CHLORITE REQUIREMENTS IS BASED ON AN AVERAGE OF EACH 3-SAMPLE SET TAKEN IN THE DISTRIBUTION SYSTEM UNDER R325.10719e(2)(b)(i)(B) AND R 325.10719e(2)(b)(ii). IF THE AVERAGE OF ANY 3-SAMPLE SET EXCEEDS THE MCL, THE SYSTEM IS IN VIOLATION OF THE MCL.
(3) COMPLIANCE WITH DISINFECTANT RESIDUALS REQUIREMENTS IS BASED ON BOTH OF THE FOLLOWING:
(a) COMPLIANCE WITH THE CHLORINE AND CHLORAMINES REQUIREMENTS IS BASED ON A RUNNING ANNUAL AVERAGE, COMPUTED QUARTERLY, OF MONTHLY AVERAGES OF ALL SAMPLES COLLECTED BY THE SYSTEM UNDER R 325.10719e(3)(a). IN CASES WHERE SYSTEMS SWITCH BETWEEN THE USE OF CHLORINE AND CHLORAMINES FOR RESIDUAL DISINFECTION DURING THE YEAR, COMPLIANCE IS DETERMINED BY INCLUDING TOGETHER ALL MONITORING RESULTS OF BOTH CHLORINE AND CHLORAMINES IN CALCULATING COMPLIANCE. SUPPLIERS SHALL CLEARLY INDICATE WHICH RESIDUAL DISINFECTANT WAS ANALYZED FOR EACH SAMPLE WHEN SUBMITTING REPORTS TO THE DEPARTMENT UNDER R 325.11502a.
(b) COMPLIANCE WITH THE CHLORINE DIOXIDE REQUIREMENTS IS BASED ON CONSECUTIVE DAILY SAMPLES COLLECTED BY THE SYSTEM UNDER R 325.10719e(3)(b).
(i) A TIER 1 VIOLATION OCCURS WHEN A DAILY SAMPLE TAKEN AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM EXCEEDS THE MRDL, AND ON THE FOLLOWING DAY 1, OR MORE, OF THE 3 SAMPLES TAKEN IN THE DISTRIBUTION SYSTEM EXCEED THE MRDL. THE SUPPLIER SHALL TAKE IMMEDIATE CORRECTIVE ACTION TO LOWER THE LEVEL OF CHLORINE DIOXIDE BELOW THE MRDL. FAILURE TO MONITOR IN THE DISTRIBUTION SYSTEM THE DAY FOLLOWING AN EXCEEDANCE OF THE CHLORINE DIOXIDE MRDL AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM IS ALSO A TIER 1 MRDL VIOLATION.
(ii) A TIER 2 VIOLATION OCCURS WHEN 2 CONSECUTIVE DAILY SAMPLES TAKEN AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM EXCEED THE MRDL AND ALL DISTRIBUTION SYSTEM SAMPLES TAKEN ARE BELOW THE MRDL. THE SUPPLIER SHALL TAKE CORRECTIVE ACTION TO LOWER THE LEVEL OF CHLORINE DIOXIDE BELOW THE MRDL AT THE POINT OF SAMPLING. FAILURE TO MONITOR AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM THE DAY FOLLOWING AN EXCEEDANCE OF THE CHLORINE DIOXIDE MRDL AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM IS ALSO A TIER 2 MRDL VIOLATION.
(4) COMPLIANCE WITH THE TREATMENT TECHNIQUE FOR DISINFECTION BYPRODUCT PRECURSORS (DBPP) IS DETERMINED AS SPECIFIED BY R 325.10610c(3). SUPPLIERS MAY BEGIN MONITORING TO DETERMINE WHETHER STEP 1 TOC REMOVALS CAN BE MET 12 MONTHS BEFORE THE COMPLIANCE DATE FOR THE SYSTEM. THIS MONITORING IS NOT REQUIRED AND FAILURE TO MONITOR DURING THIS PERIOD IS NOT A VIOLATION. HOWEVER, A SUPPLIER THAT DOES NOT MONITOR DURING THIS PERIOD, AND THEN DETERMINES, IN THE FIRST 12 MONTHS AFTER THE COMPLIANCE DATE, THAT THE SYSTEM IS NOT ABLE TO MEET THE STEP 1 REQUIREMENTS IN R 325.10610c(2)(b) AND SHALL THEREFORE APPLY FOR ALTERNATE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS, IS NOT ELIGIBLE FOR RETROACTIVE APPROVAL OF ALTERNATE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS AS ALLOWED UNDER R 325.10610c(2)(c) AND IS IN VIOLATION. SUPPLIERS MAY APPLY FOR ALTERNATE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS ANY TIME AFTER THE COMPLIANCE DATE. FOR SYSTEMS REQUIRED TO MEET STEP 1 TOC REMOVALS, IF THE VALUE CALCULATED UNDER R 325.10610c(3)(a)(iv) IS LESS THAN 1.00 CALCULATED AS A RUNNING ANNUAL AVERAGE OF MONTHLY SAMPLES, COMPUTED QUARTERLY, THE SYSTEM IS IN VIOLATION OF THE TREATMENT TECHNIQUE REQUIREMENTS.
R 325.10610c TREATMENT TECHNIQUE FOR CONTROL OF DISINFECTION BYPRODUCT (DBP) PRECURSORS.
RULE 610c. (1) THIS RULE APPLIES AS SPECIFIED IN R 325.10610(2). COMPLIANCE WITH THIS RULE IS BASED ON ALL OF THE FOLLOWING:
(a) SUPPLIERS OF SUBPART H SYSTEMS USING CONVENTIONAL FILTRATION SHALL OPERATE WITH ENHANCED COAGULATION OR ENHANCED SOFTENING TO ACHIEVE THE TOC PERCENT REMOVAL LEVELS SPECIFIED IN SUBRULE (2) OF THIS RULE UNLESS THE SYSTEM MEETS AT LEAST 1 OF THE ALTERNATIVE COMPLIANCE CRITERIA LISTED IN SUBDIVISION (b) OR (c) OF THIS SUBRULE.
(b) SUPPLIERS OF SUBPART H SYSTEMS USING CONVENTIONAL FILTRATION MAY USE THE FOLLOWING ALTERNATIVE COMPLIANCE CRITERIA TO COMPLY WITH THIS RULE INSTEAD OF COMPLYING WITH SUBRULE (2) OF THIS RULE. SUPPLIERS OF SYSTEMS USING ALTERNATIVE COMPLIANCE CRITERIA SHALL STILL COMPLY WITH TOC MONITORING REQUIREMENTS IN R 325.10719e(4):
(i) THE SYSTEM'S SOURCE WATER TOC LEVEL IS LESS THAN 2.0 MG/L, CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE.
(ii) THE SYSTEM'S TREATED WATER TOC LEVEL IS LESS THAN 2.0 MG/L, CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE.
(iii) THE SYSTEM'S SOURCE WATER TOC LEVEL IS LESS THAN 4.0 MG/L, CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE; THE SOURCE WATER ALKALINITY, MEASURED UNDER R 325.10605, IS MORE THAN 60 MG/L AS CALCIUM CARBONATE, CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE; AND EITHER THE TTHM AND HAA5 RUNNING ANNUAL AVERAGES ARE NOT MORE THAN 0.040 MG/L AND
0.030 MG/L, RESPECTIVELY, OR BEFORE THE EFFECTIVE DATE FOR COMPLIANCE IN R 325.10610(2), THE SUPPLIER HAS MADE A CLEAR AND IRREVOCABLE FINANCIAL COMMITMENT TO USE TECHNOLOGIES THAT WILL LIMIT THE LEVELS OF TTHM AND HAA5 TO NOT MORE THAN 0.040 MG/L AND 0.030 MG/L, RESPECTIVELY. SUPPLIERS SHALL
SUBMIT EVIDENCE OF A CLEAR AND IRREVOCABLE FINANCIAL COMMITMENT, IN ADDITION TO A SCHEDULE CONTAINING MILESTONES AND PERIODIC PROGRESS REPORTS FOR INSTALLATION AND OPERATION OF APPROPRIATE TECHNOLOGIES, TO THE DEPARTMENT FOR APPROVAL NOT LATER THAN THE EFFECTIVE DATE FOR COMPLIANCE IN R 325.10610(2). THESE TECHNOLOGIES SHALL BE INSTALLED AND OPERATING NOT LATER THAN JUNE 30, 2005. FAILURE TO INSTALL AND OPERATE THESE TECHNOLOGIES BY THE DATE IN THE APPROVED SCHEDULE IS A VIOLATION OF THESE RULES.
(iv) THE TTHM AND HAA5 RUNNING ANNUAL AVERAGES ARE NOT MORE THAN 0.040 MG/L AND 0.030 MG/L, RESPECTIVELY, AND THE SUPPLIER USES ONLY CHLORINE FOR PRIMARY DISINFECTION AND MAINTENANCE OF A RESIDUAL IN THE DISTRIBUTION SYSTEM.
(v) THE SYSTEM'S SOURCE WATER SUVA, BEFORE ANY TREATMENT AND MEASURED MONTHLY, IS LESS THAN OR EQUAL TO 2.0 LITERS PER MILLIGRAM METER (L/MG-M), CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE.
(vi) THE SYSTEM'S FINISHED WATER SUVA, MEASURED MONTHLY, IS LESS THAN OR EQUAL TO 2.0 L/MG-M, CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE.
(c) SUPPLIERS OF SYSTEMS PRACTICING ENHANCED SOFTENING THAT CANNOT ACHIEVE THE TOC REMOVALS REQUIRED BY SUBRULE (2)(b) OF THIS RULE MAY USE THE FOLLOWING ALTERNATIVE COMPLIANCE CRITERIA INSTEAD OF COMPLYING WITH SUBRULE (2) OF THIS RULE; HOWEVER, SUPPLIERS OF SYSTEMS USING ALTERNATIVE COMPLIANCE CRITERIA SHALL STILL COMPLY WITH TOC MONITORING REQUIREMENTS IN R 325.10719e(4)(b):
(i) SOFTENING THAT RESULTS IN LOWERING THE TREATED WATER ALKALINITY TO LESS THAN 60 MG/L AS CALCIUM CARBONATE, MEASURED MONTHLY AND CALCULATED QUARTERLY AS A RUNNING ANNUAL AVERAGE.
(ii) SOFTENING THAT RESULTS IN REMOVING NOT LESS THAN 10 MG/L OF MAGNESIUM HARDNESS AS CALCIUM CARBONATE, MEASURED MONTHLY AND CALCULATED QUARTERLY AS AN ANNUAL RUNNING AVERAGE.
(2) ALL OF THE FOLLOWING PROVISIONS ARE ENHANCED COAGULATION AND ENHANCED SOFTENING PERFORMANCE REQUIREMENTS:
(a) SUPPLIERS SHALL ACHIEVE THE PERCENT REDUCTION OF TOC SPECIFIED IN SUBDIVISION (b) OF THIS SUBRULE BETWEEN THE SOURCE WATER AND THE COMBINED FILTER EFFLUENT, UNLESS THE DEPARTMENT APPROVES A SUPPLIER'S REQUEST FOR ALTERNATE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS UNDER SUBDIVISION (c) OF THIS SUBRULE.
(b) REQUIRED STEP 1 TOC REDUCTIONS, INDICATED IN TABLE 1 OF THIS RULE, ARE BASED ON SPECIFIED SOURCE WATER PARAMETERS. SUPPLIERS PRACTICING SOFTENING ARE REQUIRED TO MEET THE STEP 1 TOC REDUCTIONS IN THE FAR-RIGHT COLUMN "SOURCE WATER ALKALINITY >120 MG/L" FOR THE SPECIFIED SOURCE WATER TOC.
TABLE 1 STEP 1 REQUIRED REMOVAL OF TOC BY ENHANCED COAGULATION AND ENHANCED SOFTENING FOR SUBPART H SYSTEMS USING CONVENTIONAL FILTRATION A, B
SOURCE-WATER MG/L
>2.0-4.0
TOC,
SOURCE-WATER AS CALCIUM CARBONATE
ALKALINITY, MG/L
0-60
>60-120
>120C
35.0%
25.0%
15.0%
>4.0-8.0
45.0%
35.0%
25.0%
>8.0
50.0%
40.0%
30.0%
A SUPPLIERS MEETING AT LEAST 1 OF THE CONDITIONS IN SUBRULE (1)(b)(i) THROUGH (vi)
OF THIS RULE ARE NOT REQUIRED TO OPERATE WITH ENHANCED COAGULATION.
B SUPPLIERS OF SOFTENING SYSTEMS MEETING 1 OF THE ALTERNATIVE COMPLIANCE CRITERIA IN SUBRULE (1)(c) OF THIS RULE ARE NOT REQUIRED TO OPERATE WITH ENHANCED SOFTENING.
C SUPPLIERS PRACTICING SOFTENING SHALL MEET THE TOC REMOVAL REQUIREMENTS IN
THIS COLUMN.
(c) SUPPLIERS OF SUBPART H CONVENTIONAL FILTRATION SYSTEMS THAT CANNOT ACHIEVE THE STEP 1 TOC REMOVALS REQUIRED BY SUBDIVISION (b) OF THIS SUBRULE DUE TO WATER QUALITY PARAMETERS OR OPERATIONAL CONSTRAINTS SHALL APPLY TO THE DEPARTMENT, WITHIN 3 MONTHS OF FAILURE TO ACHIEVE THE TOC REMOVALS REQUIRED BY SUBDIVISION (b) OF THIS SUBRULE, FOR APPROVAL OF ALTERNATIVE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS SUBMITTED BY THE SYSTEM. IF THE DEPARTMENT APPROVES THE STEP 2 REQUIREMENTS, THEN A SYSTEM'S FAILURE TO MEET THE STEP 1 TOC REMOVALS WILL NOT BE CONSIDERED A TREATMENT TECHNIQUE VIOLATION DURING THE INTERIM TIME PERIOD BETWEEN THE END OF THE 12-MONTH DATA GATHERING MONITORING PERIOD IN R 325.10610b(4) AND RECEIPT OF THE DEPARTMENT'S APPROVAL. UNTIL THE DEPARTMENT APPROVES THE STEP 2 REQUIREMENTS, THE SYSTEM SHALL MEET THE STEP 1 TOC REMOVALS CONTAINED IN SUBDIVISION (b) OF THIS SUBRULE.
(d) APPLICATIONS MADE TO THE DEPARTMENT BY SUPPLIERS OF ENHANCED COAGULATION SYSTEMS FOR APPROVAL OF ALTERNATIVE MINIMUM TOC REMOVAL (STEP 2) REQUIREMENTS UNDER SUBDIVISION (c) OF THIS SUBRULE SHALL INCLUDE, AT A MINIMUM, RESULTS OF BENCH- OR PILOT-SCALE TESTING CONDUCTED UNDER PARAGRAPH (i) OF THIS SUBDIVISION TO DETERMINE THE ALTERNATE ENHANCED COAGULATION LEVEL:
(i) ALTERNATE ENHANCED COAGULATION LEVEL IS DEFINED AS COAGULATION AT A COAGULANT DOSE AND PH AS DETERMINED BY THE METHOD DESCRIBED IN PARAGRAPHS (i) THROUGH (v) OF THIS SUBDIVISION SUCH THAT AN INCREMENTAL ADDITION OF 10 MG/L OF ALUM, OR EQUIVALENT AMOUNT OF FERRIC SALT, RESULTS IN A TOC REMOVAL OF LESS THAN OR EQUAL TO 0.3 MG/L. THE PERCENT REMOVAL OF TOC
AT THIS POINT IS THE MINIMUM TOC REMOVAL REQUIRED FOR THE SYSTEM. ONCE APPROVED BY THE DEPARTMENT, THIS MINIMUM REQUIREMENT SUPERSEDES THE MINIMUM TOC REMOVAL REQUIRED BY TABLE 1 OF THIS RULE. THIS REQUIREMENT WILL BE EFFECTIVE UNTIL THE DEPARTMENT APPROVES A NEW VALUE BASED ON THE RESULTS OF A NEW BENCH- AND PILOT-SCALE TEST. FAILURE TO ACHIEVE DEPARTMENT-SET ALTERNATIVE MINIMUM TOC REMOVAL LEVELS IS A VIOLATION OF THESE RULES.
(ii) BENCH- OR PILOT-SCALE TESTING OF ENHANCED COAGULATION SHALL BE CONDUCTED BY USING REPRESENTATIVE WATER SAMPLES AND ADDING 10 MG/L INCREMENTS OF ALUM, OR EQUIVALENT AMOUNTS OF FERRIC SALT, UNTIL THE PH IS REDUCED TO A LEVEL LESS THAN OR EQUAL TO THE ENHANCED COAGULATION STEP 2 TARGET PH SHOWN IN THE FOLLOWING TABLE:
TABLE 2 ENHANCED COAGULATION STEP 2 TARGET PH
ALKALINITY
(MG/L AS CALCIUM CARBONATE)
TARGET PH
0-60
5.5
>60-120
6.3
>120-240
7.0
>240
7.5
(iii) FOR WATERS WITH ALKALINITIES OF LESS THAN 60 MG/L FOR WHICH ADDITION OF SMALL AMOUNTS OF ALUM OR EQUIVALENT ADDITION OF IRON COAGULANT DRIVES THE PH BELOW 5.5 BEFORE SIGNIFICANT TOC REMOVAL OCCURS, THE SUPPLIER SHALL ADD NECESSARY CHEMICALS TO MAINTAIN THE PH BETWEEN 5.3 AND 5.7 IN SAMPLES UNTIL THE TOC REMOVAL OF 0.3 MG/L PER 10 MG/L ALUM ADDED, OR EQUIVALANT ADDITION OF IRON COAGULANT, IS REACHED.
(iv) THE SYSTEM MAY OPERATE AT ANY COAGULANT DOSE OR PH NECESSARY, AND CONSISTANT WITH THESE RULES, TO ACHIEVE THE MINIMUM TOC PERCENT REMOVAL APPROVED UNDER SUBDIVISION (c) OF THIS SUBRULE.
(v) IF THE TOC REMOVAL IS CONSISTENTLY LESS THAN 0.3 MG/L OF TOC PER 10 MG/L OF INCREMENTAL ALUM DOSE AT ALL DOSAGES OF ALUM, OR EQUIVALANT ADDITION OF IRON COAGULANT, THE WATER IS CONSIDERED TO CONTAIN TOC NOT AMENABLE TO ENHANCED COAGULATION. THE SUPPLIER MAY THEN APPLY TO THE DEPARTMENT FOR A WAIVER OF ENHANCED COAGULATION REQUIREMENTS. THE DEPARTMENT'S DETERMINATION WILL BE MADE ON A CASE-BY-CASE BASIS AND THE DEPARTMENT WILL CONSIDER SUPPORTING DOCUMENTATION FROM THE WATER SUPPLIER OF BENCH OR PILOT SCALE TESTING DESIGNED TO DEMONSTRATE THE BEST LEVEL OF TOC REMOVAL THAT IS FEASIBLY ATTAINABLE, GIVEN THE UNIQUE CHARACTERISTICS OF THE RAW WATER TO BE TREATED.
(3) SUPPLIERS SHALL CALCULATE COMPLIANCE USING THE METHODS IN EITHER OF THE FOLLOWING PROVISIONS, AS APPLICABLE:
(a) SUPPLIERS OF SUBPART H SYSTEMS, OTHER THAN THOSE IDENTIFIED IN SUBRULE (1)(b) OR (c) OF THIS RULE, SHALL COMPLY WITH REQUIREMENTS CONTAINED IN SUBULE (2)(b) OR (c) OF THIS RULE. SUPPLIERS SHALL CALCULATE COMPLIANCE QUARTERLY, BEGINNING AFTER THE SUPPLIER HAS COLLECTED 12 MONTHS OF DATA, BY DETERMINING AN ANNUAL AVERAGE USING THE FOLLOWING METHOD:
(i) DETERMINE ACTUAL MONTHLY TOC PERCENT REMOVAL, EQUAL TO: (1 - (TREATED WATER TOC/SOURCE WATER TOC)) X 100.
(ii) DETERMINE THE REQUIRED MONTHLY TOC PERCENT REMOVAL, FROM EITHER TABLE 1 OF THIS RULE OR FROM SUBRULE (2)(c) OF THIS RULE.
(iii) DIVIDE THE VALUE IN PARAGRAPH (i) OF THIS SUBDIVISION BY THE VALUE IN PARAGRAPH (ii) OF THIS SUBDIVISION.
(iv) ADD TOGETHER THE RESULTS OF PARAGRAPH (iii) OF THIS SUBDIVISION FOR THE LAST 12 MONTHS AND DIVIDE BY 12.
(v) IF THE VALUE CALCULATED IN PARAGRAPH (iv) OF THIS SUBDIVISION IS LESS THAN 1.00, THE SYSTEM IS NOT IN COMPLIANCE WITH THE TOC PERCENT REMOVAL REQUIREMENTS.
(b) SUPPLIERS MAY USE THE PROVISIONS IN PARAGRAPHS (i) THROUGH (v) OF THIS SUBDIVISION INSTEAD OF THE CALCULATIONS IN SUBDIVISION (a)(i) THROUGH (v) OF THIS SUBRULE TO DETERMINE COMPLIANCE WITH TOC PERCENT REMOVAL REQUIREMENTS, AS FOLLOWS:
(i) IN ANY MONTH THAT THE SYSTEM'S TREATED OR SOURCE WATER TOC LEVEL IS LESS THAN 2.0 MG/L, THE SUPPLIER MAY ASSIGN A MONTHLY VALUE OF 1.0, INSTEAD OF THE VALUE CALCULATED IN SUBDIVISION (a)(iii) OF THIS SUBRULE, WHEN CALCULATING COMPLIANCE UNDER SUBDIVISION (a) OF THIS SUBRULE.
(ii) IN ANY MONTH THAT A SYSTEM PRACTICING SOFTENING REMOVES NOT LESS THAN 10 MG/L OF MAGNESIUM HARDNESS AS CALCIUM CARBONATE, THE SUPPLIER MAY ASSIGN A MONTHLY VALUE OF 1.0, INSTEAD OF THE VALUE CALCULATED IN SUBDIVISION (a)(iii) OF THIS SUBRULE, WHEN CALCULATING COMPLIANCE UNDER SUBDIVISION (a) OF THIS SUBRULE.
(iii) IN ANY MONTH THAT THE SYSTEM'S SOURCE WATER SUVA, BEFORE ANY TREATMENT, IS LESS THAN OR EQUAL TO 2.0 L/MG-M, THE SUPPLIER MAY ASSIGN A MONTHLY VALUE OF 1.0, INSTEAD OF THE VALUE CALCULATED IN SUBDIVISION (a)(iii) OF THIS SUBRULE, WHEN CALCULATING COMPLIANCE UNDER SUBDIVISION (a) OF THIS SUBRULE.
(iv) IN ANY MONTH THAT THE SYSTEM'S FINISHED WATER SUVA IS LESS THAN OR EQUAL TO 2.0 L/MG-M, THE SUPPLIER MAY ASSIGN A MONTHLY VALUE OF 1.0, INSTEAD OF THE VALUE CALCULATED IN SUBDIVISION (a)(iii) OF THIS SUBRULE, WHEN CALCULATING COMPLIANCE UNDER SUBDIVISION (a) OF THIS SUBRULE.
(v) IN ANY MONTH THAT A SYSTEM PRACTICING ENHANCED SOFTENING LOWERS ALKALINITY BELOW 60 MG/L AS CALCIUM CARBONATE, THE SUPPLIER MAY ASSIGN A MONTHLY VALUE OF 1.0, INSTEAD OF THE VALUE CALCULATED IN SUBDIVISION (a)(iii) OF THIS SUBRULE, WHEN CALCULATING COMPLIANCE UNDER SUBDIVISION (a) OF THIS SUBRULE.
(4) THE TREATMENT TECHNIQUES TO CONTROL THE LEVEL OF DISINFECTION BYPRODUCT PRECURSORS IN DRINKING WATER TREATMENT AND DISTRIBUTION
SYSTEMS FOR SUBPART H SYSTEMS USING CONVENTIONAL FILTRATION IS ENHANCED COAGULATION OR ENHANCED SOFTENING.
R 325.10611 FILTRATION AND DISINFECTION; GENERALLY.
RULE 611. (1) A SUPPLIER OF A PUBLIC WATER SYSTEM SHALL COMPLY WITH THE REQUIREMENTS OF R 325.10807, R 325.10808, R 325.10812, R 325.10813, R 325.10816,
R 325.10817, R 325.10818, R 325.10819, R 325.10820, AND R 325.10822, SHALL DEMONSTRATE A SAFE MICROBIOLOGICAL WATER QUALITY HISTORY, AND MAY BE REQUIRED TO DEMONSTRATE STABILITY IN OTHER MEASUREMENTS OF WATER QUALITY; OR THE SUPPLIER SHALL PROVIDE COMPLETE TREATMENT.
(2) THE DEPARTMENT MAY GRANT A DEVIATION FROM THE PROVISIONS OF SUBRULE (1) OF THIS RULE IF THE SUPPLIER CAN DEMONSTRATE THAT THE SYSTEM IS CAPABLE OF PRODUCING FINISHED WATER MEETING STATE DRINKING WATER STANDARDS APPLICABLE TO SYSTEMS USING ONLY GROUND WATER NOT UNDER THE DIRECT INFLUENCE OF SURFACE WATER.
(3) SUPPLIERS OF SUBPART H SYSTEMS SHALL COMPLY WITH THE TREATMENT TECHNIQUES OF THIS RULE, R 325.10611a, R 325.10611b, THE SAMPLING REQUIREMENTS OF R 325.10720, AND THE REPORTING AND RECORDKEEPING REQUIREMENTS OF R 325.10720a, EXCEPT WHERE NOTED. THE TREATMENT TECHNIQUE REQUIREMENTS CONSIST OF INSTALLING AND PROPERLY OPERATING WATER TREATMENT PROCESSES THAT RELIABLY ACHIEVE ALL OF THE FOLLOWING APPLICABLE REMOVAL OR INACTIVATION PERCENTAGES BETWEEN A POINT WHERE THE RAW WATER IS NOT SUBJECT TO RECONTAMINATION BY SURFACE WATER RUNOFF AND A POINT DOWNSTREAM BEFORE OR AT THE FIRST CUSTOMER:
(a) NOT LESS THAN 99.9% (3-LOG) INACTIVATION OR THE REMOVAL OF GIARDIA LAMBLIA CYSTS AND NOT LESS THAN 99.99% (4-LOG) INACTIVATION OR THE REMOVAL OF VIRUSES.
(b) A 99% (2-LOG) REMOVAL OF CRYPTOSPORIDIUM OOCYSTS FOR SYSTEMS SUBJECT TO THIS RULE SERVING 10,000 OR MORE PEOPLE.
(4) IF THE DEPARTMENT DETERMINES THAT A SYSTEM REQUIRES COMPLETE TREATMENT EITHER UNDER SUBRULES (1) AND (2) OR BECAUSE THE SYSTEM USES SURFACE WATER OR GROUNDWATER UNDER THE DIRECT INFLUENCE OF SURFACE WATER, THEN THE SUPPLIER SHALL PROVIDE COMPLETE TREATMENT WITHIN 18 MONTHS OF THE DEPARTMENT'S DETERMINATION AND SHALL PROVIDE INTERIM DISINFECTION AND MONITORING AS CONSIDERED NECESSARY BY THE DEPARTMENT. DURING THE INTERIM DISINFECTION PERIOD, SYSTEMS REQUIRING COMPLETE TREATMENT UNDER SUBRULE (1) AND (2) OF THIS RULE SHALL DEMONSTRATE SAFE MICROBIOLOGICAL WATER QUALITY. SUBPART H SYSTEMS ARE SUBJECT TO SUBRULE (3) OF THIS RULE WITHIN 18 MONTHS OR UNTIL TREATMENT IS INSTALLED, WHICHEVER OCCURS FIRST. DURING THE INTERIM DISINFECTION PERIOD, SUBPART H SYSTEMS SHALL ALSO COMPLY WITH BOTH OF THE FOLLOWING PROVISIONS:
(a) THE SUPPLIER SHALL COLLECT AT LEAST 1 SAMPLE FROM THE SOURCE WATER EVERY 4 HOURS WHILE THE SOURCE IS BEING UTILIZED AND HAVE THE SAMPLE ANALYZED FOR TURBIDITY.
(b) IF THE RESULT OF 1 OR MORE SAMPLES TAKEN UNDER SUBDIVISION (a) OF THIS SUBRULE IS MORE THAN 1 NTU, THEN WITHIN 24 HOURS OF THE DETERMINATION THAT A TURBIDITY MEASUREMENT IS MORE THAN 1 NTU, THE SUPPLIER SHALL COLLECT AT LEAST 1 SAMPLE NEAR THE FIRST SERVICE CONNECTION AND HAVE THE SAMPLE ANALYZED FOR TOTAL COLIFORM. SAMPLE RESULTS FROM THE COLIFORM MONITORING SHALL BE INCLUDED IN DETERMINING COMPLIANCE WITH THE TOTAL COLIFORM STANDARD.
R 325.10611a FILTRATION AND DISINFECTION; DISINFECTION.
RULE 611a. (1) SUBPART H SYSTEMS SHALL PROVIDE SUFFICIENT DISINFECTANT CONTACT TIME BEFORE THE WATER ENTERS THE DISTRIBUTION SYSTEM TO ASSURE ADEQUATE DISINFECTION.
(2) SUBPART H SYSTEMS SHALL PROVIDE DISINFECTION TREATMENT ACHIEVING ALL OF THE FOLLOWING CONDITIONS:
(a) THE DISINFECTION TREATMENT SHALL BE SUFFICIENT TO ENSURE THAT THE TOTAL TREATMENT PROCESSES OF THAT SYSTEM ACHIEVE THE STANDARDS SET FORTH IN R 325.611(3)(a).
(b) THE RESIDUAL DISINFECTANT CONCENTRATION IN THE WATER ENTERING THE DISTRIBUTION SYSTEM SHALL NOT BE LESS THAN 0.2 MILLIGRAMS PER LITER FOR MORE THAN 4 HOURS.
(c) THE RESIDUAL DISINFECTANT CONCENTRATION IN THE DISTRIBUTION SYSTEM, MEASURED AS TOTAL CHLORINE, FREE AVAILABLE CHLORINE, COMBINED CHLORINE, OR CHLORINE DIOXIDE SHALL NOT BE UNDETECTABLE IN MORE THAN 5% OF THE SAMPLES EACH MONTH FOR ANY 2 CONSECUTIVE MONTHS THAT THE SYSTEM SERVES WATER TO THE PUBLIC. WATER IN THE DISTRIBUTION SYSTEM THAT HAS A HETEROTROPHIC BACTERIA CONCENTRATION LESS THAN OR EQUAL TO 500 PER MILLILITER, MEASURED AS HETEROTROPHIC PLATE COUNT (HPC), IS CONSIDERED TO HAVE A DETECTABLE DISINFECTANT RESIDUAL FOR PURPOSES OF DETERMINING COMPLIANCE WITH THIS SUBDIVISION.
(d) IF THE DEPARTMENT DETERMINES, BASED ON SITE-SPECIFIC CONSIDERATIONS, THAT A SYSTEM DOES NOT HAVE MEANS FOR HAVING A SAMPLE TRANSPORTED AND ANALYZED FOR HPC AND THAT THE SYSTEM IS PROVIDING ADEQUATE DISINFECTION IN THE DISTRIBUTION SYSTEM, THEN THE REQUIREMENTS OF SUBDIVISION (c) OF THIS SUBRULE DO NOT APPLY.
R 325.10611b FILTRATION AND DISINFECTION; FILTRATION.
RULE 611b. (1) SUPPLIERS OF SUBPART H SYSTEMS SHALL COMPLY WITH BOTH OF THE FOLLOWING FILTRATION REQUIREMENTS, AS APPLICABLE:
(a) FOR SUPPLIERS OF SYSTEMS USING CONVENTIONAL FILTRATION, DIRECT FILTRATION, OR MEMBRANE FILTRATION, THE TURBIDITY LEVEL OF REPRESENTATIVE SAMPLES OF A SYSTEM'S FILTERED WATER SHALL AT NO TIME EXCEED 1 NTU FOR SYSTEMS SERVING 10,000 OR MORE PEOPLE, OR 5 NTU FOR SYSTEMS SERVING FEWER THAN 10,000 PEOPLE. IN NOT LESS THAN 95% OF THE MEASUREMENTS TAKEN EACH MONTH, THE TURBIDITY LEVEL OF REPRESENTATIVE SAMPLES OF A SYSTEM'S FILTERED
WATER SHALL BE LESS THAN OR EQUAL TO 0.3 NTU FOR SYSTEMS SERVING 10,000 OR MORE PEOPLE, OR 0.5 NTU FOR OTHER SYSTEMS.
(b) FOR SUPPLIERS OF SYSTEMS USING SLOW SAND FILTRATION OR DIATOMACEOUS EARTH FILTRATION, THE TURBIDITY LEVEL OF REPRESENTATIVE SAMPLES OF A SYSTEM'S FILTERED WATER SHALL AT NO TIME EXCEED 5 NTU, AND SHALL BE LESS THAN OR EQUAL TO 1 NTU IN NOT LESS THAN 95% OF THE MEASUREMENTS TAKEN EACH MONTH.
(2) A SYSTEM USING LIME SOFTENING, WHERE THE FINAL PH EXCEEDS 8.3, MAY ACIDIFY REPRESENTATIVE SAMPLES BEFORE TURBIDITY ANALYSIS USING A PROTOCOL APPROVED BY THE DEPARTMENT. THE APPROVED PROTOCOL SHALL REQUIRE THE USE OF A CONCENTRATED ACID IN SUFFICIENT QUANTITIES TO LOWER THE PH TO LESS THAN 8.3, DISSOLVE ONLY CALCIUM CARBONATE AND MAGNESIUM HYDROXIDE, AND NOT TO DILUTE THE REPRESENTATIVE SAMPLE.
(3) A PUBLIC WATER SYSTEM MAY USE A FILTRATION TECHNOLOGY NOT LISTED IN SUBRULE (1) OF THIS RULE IF THE SUPPLIER DEMONSTRATES TO THE DEPARTMENT, USING PILOT PLANT STUDIES OR OTHER MEANS, THAT THE ALTERNATIVE FILTRATION TECHNOLOGY, IN COMBINATION WITH DISINFECTION TREATMENT, CONSISTENTLY ACHIEVES THE REMOVAL OR INACTIVATION PERCENTAGES SET FORTH IN R325.10611(3), AND THE DEPARTMENT APPROVES THE USE OF THE FILTRATION TECHNOLOGY. FOR EACH APPROVAL, THE DEPARTMENT WILL SET TURBIDITY PERFORMANCE REQUIREMENT THAT THE SYSTEM SHALL MEET NOT LESS THAN 95% OF THE TIME AND THE SYSTEM SHALL NOT EXCEED, AT ANY TIME, A LEVEL THAT CONSISTENTLY ACHIEVES THE REMOVAL OR INACTIVATION PERCENTAGES SET FORTH IN R 325.10611(3).
