10 PROPOSED ADMINISTRATIVE RULES

 

 

ORR #2002-023

 

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 325.10702, R 325.10704, R 325.10706, R 325.10707b, R 325.10719a, R 325.10719d, and R 325.10720

of the Michigan Administrative Code are amended, R325.10719e, R 325.10719f, and R 325.10720a are added to the Code, and R 325.10719 and R 325.10721 of the Code are rescinded as follows:

 

PART 7. SURVEILLANCE, INSPECTION, AND MONITORING

 

R 325.10702 Evaluation of adequacy and condition of public water supplies SYSTEMS; sanitary surveys.

Rule 702. (1) In accordance with the provisions of UNDER section 3 of the act, the department shall make sanitary surveys, on-site inspections, surveillance observations, or special purpose investigations for the purpose of evaluating the adequacy and condition of public water supplies SYSTEMS at a frequency which may be determined by the department.

(2)    The facilities of type I and type II public water supplies COMMUNITY AND NONCOMMUNITY WATER SYSTEMS which are DO not required to have COLLECT 5 or more routine samples per month collected pursuant to the provisions of UNDER R 325.10705(2) and R 325.10706(2) shall undergo an initial sanitary survey by June 29, 1994, for type I public water supplies COMMUNITY WATER SYSTEMS and by June 29, 1999, for type II water supplies NONCOMMUNITY WATER SYSTEMS. The facilities of these water supplies THESE SYSTEMS shall undergo another sanitary survey every 5 years, except that the facilities of type II public water supplies NONCOMMUNITY WATER SYSTEMS that use only disinfected groundwater NOT UNDER THE DIRECT INFLUENCE OF SURFACE WATER meeting the requirements of R 325.11004(1) STATE DRINKING WATER STANDARDS shall undergo subsequent sanitary surveys at least once every 10 years after the initial sanitary survey. Based on the results of each sanitary survey, the department shall determine whether the existing monitoring frequency is adequate and what additional measures, if any, the water supplier needs to undertake SHALL TAKE to improve drinking water quality.

(3)   SUBPART H SYSTEMS SERVING 10,000 OR MORE PEOPLE SHALL UNDERGO SANITARY SURVEYS AT LEAST ONCE EVERY 3 YEARS FOR COMMUNITY WATER SYSTEMS AND AT

 

 

LEAST ONCE EVERY 5 YEARS FOR NONCOMMUNITY WATER SYSTEMS. COMMUNITY WATER SYSTEMS THAT HAVE UNDERGONE SANITARY SURVEYS AFTER DECEMBER 1995 AND HAVE DEMONSTRATED OUTSTANDING PERFORMANCE MAY REDUCE THE FREQUENCY OF SANITARY SURVEYS TO AT LEAST ONCE EVERY 5 YEARS.

 

R 325.10704 Collection and analysis of samples for coliform bacteria generally.

Rule 704. (1) Suppliers of water of type I and type II public water supplies COMMUNITY AND NONCOMMUNITY WATER SYSTEMS shall collect samples and cause analyses to be made for coliform bacteria to determine compliance with the state drinking water standards.

(2) The department may require samples to be collected and analyzed for coliform bacteria for type III public water supplies SYSTEMS at a frequency as may be deemed CONSIDERED necessary by the department.

 

R 325.10706 Collection and analysis of samples for coliform bacteria; type II public water supply NONCOMMUNITY WATER SYSTEM.

Rule 706. (1) A supplier of water of a type II public water supply A NONCOMMUNITY WATER SYSTEM shall collect samples for total coliform analysis at sites, which are representative of the water throughout the distribution system according to a written sample siting plan that is subject to department review and revision.

(2)      A supplier of water for a type II water supply A NONCOMMUNITY WATER SYSTEM shall monitor according to the following provisions AS FOLLOWS:

(a)    A type II water system that serves SUPPLIER OF A NONCOMMUNITY WATER SYSTEM SERVING more than 1,000 persons PEOPLE shall be monitored at the same frequency as a like-sized type I public water supply COMMUNITY WATER SYSTEM as specified in table 1 of this part R 325.10705.

(b)  A supplier of water for a type II water supply that uses a source of water which requires complete treatment pursuant to the provisions of R 325.11004(1) A NONCOMMUNITY WATER SYSTEM FOR WHICH COMPLETE TREATMENT IS REQUIRED UNDER R 325.10611(1) shall monitor at the same frequency that AS a like-sized type I public water supply is monitored COMMUNITY WATER SYSTEM as specified by IN table 1 of this part R 325.10705.

(c)  A supplier of water of a type II water supply which uses A SYSTEM USING only groundwater NOT UNDER THE DIRECT INFLUENCE OF SURFACE WATER and which serves less SERVING FEWER than 1,001 persons PEOPLE shall monitor each calendar quarter that the system provides water to the public.

(3)              The department, based on a satisfactory sanitary survey of a type II public water supply NONCOMMUNITY WATER SYSTEM serving less FEWER than 1,001 persons PEOPLE with a protected groundwater source, may vary the frequency of sampling. However, for systems that serve less than 1,001 persons beginning June 29, 1994, the frequency shall not be less than BE AT LEAST once per year. The decision to reduce the monitoring frequency shall be in writing.

 

R 325.10707b General notification re quirements for total coliform and fecal coliform/Escherichia coli (E. coli).

Rule 707b. (1) EXCEPT AS NOTED IN THIS RULE, A SUPPLIER OF A PUBLIC WATER SYSTEM SHALL REPORT TO THE DEPARTMENT THE RESULTS OF THE ANALYSES AS REQUIRED IN R 325.10734(1).

(2)      A SUPPLIER THAT HAS FAILED TO COMPLY WITH A COLIFORM MONITORING REQUIREMENT, INCLUDING THE SANITARY SURVEY REQUIREMENT, SHALL REPORT THE MONITORING VIOLATION TO THE DEPARTMENT WITHIN 10 DAYS AFTER THE SYSTEM DISCOVERS THE VIOLATION.

 

 

(3)  A supplier of water of a public water supply which has SYSTEM THAT exceeded the MCL for total coliform specified in UNDER R 325.10602 shall report the violation to the department not later than the end of the next business day after the supplier learns of the violation and shall notify the public pursuant to the provisions of R 325.10403, R 325.10405, and R 325.10406.

(2) (4) If fecal coliform or E. coli are determined to be present in any routine or repeat sample, the owner of the water supply SUPPLIER shall notify the department by the end of the day that the supplier of water is notified of the test result, unless the supplier of water is notified of the result after the department office is closed, in which case the supplier of water shall notify the department before the end of the next business day.

 

R 325.10719 Rescinded SOCs ; reporting and notification.

Rule 719. (1) If the result of an analysis made pursuant to the provisions of R 325.10717 indicates that the concentration of a regulated pesticide or herbicide exceeds the MCL, the supplier of water shall report to the division within 7 days and shall initiate 3 additional analyses at the same sampling point within 1 month.

(2) When the average of 4 analyses that are made pursuant to the provisions of subrule (1) of this rule for the chemical in question exceeds the MCL, the supplier of water shall notify the division within 48 hours and shall give notice to the public pursuant to the provisions of part 4 of these rules. Monitoring after public notification shall be at a frequency determined by the department and shall continue until the MCL has not been exceeded in 2 successive samples or until a monitoring schedule, as a condition to a variance, exemption, or enforcement action, becomes effective.

 

R 325.10719a Total trihalomethane ; collection and analysis of samples generally.

Rule 719a. (1) Type I public water supplies which serve a population of 10,000 or more individuals and which add a disinfectant to the water as a normal part of the treatment process SYSTEMS SUBJECT TO THIS RULE, AS SPECIFIED IN SUBRULE (4) OF THIS RULE, shall collect samples and cause analyses to be performed for TOTAL TRIHALOMETHANES (TTHM) levels to determine compliance with the state drinking water standards MCL OF 0.10 MG/L UNDER R325.10610(1). For those public water supplies SYSTEMS purchasing finished water from another public water supply SYSTEM, the department may modify the monitoring requirements for TTHM in accordance with R 325.10733.

(2)  Based on knowledge of the source and treatment, the department may require certain type I public water supplies SYSTEMS serving less FEWER than 10,000 individuals PEOPLE to monitor for TTHM as deemed necessary.

(3)   The minimum number of samples required to be taken by public water supplies SYSTEMS for total trihalomethane analysis shall be based on the number of treatment plants used by the public water supply SYSTEM, except that multiple wells drawing water from a single aquifer shall, with department approval, be considered 1 treatment plant for determining the minimum number of samples. All samples required to be taken within an established sampling frequency shall be taken within a 24-hour period.

(4)  THIS RULE, R 325.10719b, R 325.10719c, AND R 325.10719d APPLY TO COMMUNITY WATER SYSTEMS USING ONLY GROUND WATER NOT UNDER THE DIRECT INFLUENCE OF SURFACE WATER THAT ADD A DISINFECTANT IN ANY PART OF THE TREATMENT PROCESS AND SERVE A POPULATION OF 10,000 OR MORE UNTIL DECEMBER 31, 2003. AFTER DECEMBER 31, 2003, THIS RULE, R 325.10719b, R 325.10719c, AND R325.10719d NO LONGER APPLY.

 

R 325.10719d Total trihalomethane ; reporting and notification.

 

 

Rule 719d. (1) The results of all analyses performed to determine TTHM concentration pursuant to this part shall be reported to the department within 10 days following the month of record UNDER R 325.10734(1). All sSamples collected for TTHM analyses UNDER R 325.10719a shall be used for determining compliance with the provisions of this part TOTAL TRIHALOMETHANE MCL OF 0.10 MG/L IN R 325.10610, unless the analytical results are invalidated for technical reasons.

(2)   Compliance with the MCL for TTHM shall be determined based on a running annual average of quarterly samples collected by the public water supply as prescribed in R 325.10719b or R 325.10719c(1). If the average of samples covering any 12-month period exceeds the MCL, the supplier of water shall report to the division within 48 hours pursuant to this part DEPARTMENT UNDER R325.10734(2) and shall notify the public pursuant to part 4 of these rules. Monitoring after public notification shall be at a frequency designated by the department.

(3)  THIS RULE APPLIES AS SET FORTH IN R 325.10719a(4).

 

R 325.10719e      DISINFECTANT       RESIDUALS,       DISINFECTION    BYPRODUCTS,       AND DISINFECTION BYPRODUCT PRECURSORS; MONITORING REQUIREMENTS.

RULE 719e. (1) THIS RULE APPLIES AS SET FORTH IN R 325.10610. ALL OF THE FOLLOWING PROVISIONS ARE GENERAL MONITORING REQUIREMENTS:

(a)  SUPPLIERS SHALL TAKE ALL SAMPLES DURING NORMAL OPERATING CONDITIONS.

(b)     SUPPLIERS MAY CONSIDER MULTIPLE WELLS DRAWING WATER FROM A SINGLE AQUIFER AS 1 TREATMENT PLANT FOR DETERMINING THE MINIMUM NUMBER OF TTHM AND HAA5 SAMPLES REQUIRED, WITH DEPARTMENT APPROVAL. THIS APPROVAL WILL BE GRANTED IN WRITING IF THE SUPPLIER CAN DEMONSTRATE THAT THE FINISHED WATER QUALITY CHARACTERISTIC OF ALL ENTRY POINTS TO THE DISTRIBUTION SYSTEM DRAWING FROM THE IDENTIFIED AQUIFER, WHETHER SERVED BY MULTIPLE WELLS OR A SINGLE WELL, ARE SIMILAR AND ARE EXPECTED TO REACT ALIKE IN TERMS OF THE FORMATION OF DISINFECTION BYPRODUCTS. TO DEMONSTRATE THIS, THE SUPPLIER SHALL ARRANGE FOR A STUDY TO BE PREPARED BY AN INDIVIDUAL OR FIRM CONSIDERED QUALIFIED TO PERFORM THIS WORK, SUCH AS A HYDROGEOLOGIST, GEOLOGIST, OR ENGINEER. ALL OF THE FOLLOWING PROVISIONS APPLY TO THE STUDY:

(i)   THE STUDY SHALL CONSIDER WELL CONSTRUCTION AND GEOLOGY, INCLUDING ALL OF THE FOLLOWING:

(A)  WELL LOCATIONS MARKED ON A TOPOGRAPHICAL MAP.

(B)  WELL DEPTHS.

(C)     WELL  LOGS  SHOWING  GEOLOGICAL  STRATA,  IDENTIFING  WATER  PRODUCTION ZONES, SCREENED OR SLOTTED AREAS, AND GROUTING OF THE ANNULAR SPACE.

(D)  STATIC WATER LEVELS.

(E)  AQUIFER STUDIES AND MAPS.

(F)  TREATMENT APPLIED.

(ii)   THE STUDY SHALL CONSIDER WATER CHARACTERISTICS AND CHEMISTRY OF EACH WELL INCLUDING ALL OF THE FOLLOWING:

(A) FIELD PH.

(B)  FIELD TEMPERATURES.

(C)  SPECIFIC CONDUCTIVITY.

(D)  TOTAL ORGANIC CARBON.

 

 

(E)  ANALYSES OF COMMON IONS WITH A CALCULATED CATION/ION BALANCE, SUCH AS CALCIUM, MAGNESIUM, IRON, MANGANESE, SODIUM SULFATE, ALKALINITY, AND CHLORIDE.

(iii)     THE DEPARTMENT MAY REQUIRE DISINFECTION BYPRODUCTS MONITORING AT VARIOUS ENTRY POINTS TO THE DISTRIBUTION SYSTEM TO DETERMINE IF THE STUDY CONCLUSIONS ARE CORRECT.

(IV) RESULTS OF DISINFECTION BYPRODUCTS MONITORING MAY BE USED INSTEAD OF THE STUDY IF ALL ENTRY POINTS TO THE DISTRIBUTION SYSTEM DRAWING FROM THE IDENTIFIED AQUIFER SHOW THAT THE LEVELS ARE BELOW THE MCLS.

(c)    FAILURE TO MONITOR IN ACCORDANCE WITH THE MONITORING PLAN REQUIRED UNDER SUBRULE (5) OF THIS RULE IS A MONITORING VIOLATION.

(d)   FAILURE TO MONITOR WILL BE TREATED AS A VIOLATION FOR THE ENTIRE PERIOD COVERED BY THE ANNUAL AVERAGE WHERE COMPLIANCE IS BASED ON A RUNNING ANNUAL AVERAGE OF MONTHLY OR QUARTERLY SAMPLES OR AVERAGES AND THE SUPPLIER'S FAILURE TO MONITOR MAKES IT IMPOSSIBLE TO DETERMINE COMPLIANCE WITH MCLS OR MRDLS.

(e)   SUPPLIERS SHALL USE ONLY DATA COLLECTED UNDER THIS RULE TO QUALIFY FOR REDUCED MONITORING.

(2)      ALL OF THE FOLLOWING PROVISIONS ARE MONITORING REQUIREMENTS FOR DISINFECTION BYPRODUCTS:

(a)       ALL OF THE FOLLOWING PROVISIONS ARE TTHM AND HAA5 MONITORING REQUIREMENTS:

(i)   SUPPLIERS SHALL CONDUCT ROUTINE MONITORING AT THE FREQUENCY INDICATED IN TABLE 1 OF THIS RULE:

2002 MR 15 – September 1, 2002

 

 

TABLE 1 ROUTINE MONITORING FREQUENCY FOR TTHM AND HAA5

 

TYPE OF SYSTEM	MINIMUM MONITORING FREQUENCY	SAMPLE LOCATION IN THE DISTRIBUTION SYSTEM
SUBPART H SYSTEM SERVING 10,000 OR MORE PEOPLE.	4 WATER SAMPLES PER QUARTER PER TREATMENT PLANT.	NOT LESS THAN 25% OF ALL SAMPLES COLLECTED EACH QUARTER AT LOCATIONS REPRESENTING MAXIMUM RESIDENCE TIME. REMAINING SAMPLES TAKEN AT LOCATIONS REPRESENTATIVE OF AT LEAST AVERAGE RESIDENCE TIME IN THE DISTRIBUTION SYSTEM AND REPRESENTING THE ENTIRE DISTRIBUTION SYSTEM, TAKING INTO ACCOUNT THE NUMBER OF PERSONS SERVED, DIFFERENT SOURCES OF WATER, AND DIFFERENT TREATMENT METHODS1.
SUBPART H SYSTEM SERVING FROM 500 TO 9,999 PEOPLE.	1 WATER SAMPLE PER QUARTER PER TREATMENT PLANT.	LOCATIONS REPRESENTING MAXIMUM RESIDENCE TIME1.
SUBPART H SYSTEM SERVING FEWER THAN 500 PEOPLE.	1 SAMPLE PER YEAR PER TREATMENT PLANT DURING MONTH OF WARMEST WATER TEMPERATURE.	LOCATIONS REPRESENTING MAXIMUM RESIDENCE TIME1. IF THE SAMPLE (OR AVERAGE OF ANNUAL SAMPLES, IF MORE THAN 1 SAMPLE IS TAKEN) EXCEEDS THE MCL, THE SYSTEM SHALL INCREASE MONITORING TO 1 SAMPLE PER TREATMENT PLANT PER QUARTER, TAKEN AT A POINT REFLECTING THE MAXIMUM RESIDENCE TIME IN THE DISTRIBUTION SYSTEM, UNTIL THE SYSTEM MEETS CRITERIA IN PARAGRAPH (iv) OF THIS SUBDIVISION.
SYSTEM USING ONLY GROUND WATER NOT UNDER DIRECT INFLUENCE OF SURFACE WATER USING CHEMICAL DISINFECTANT AND SERVING 10,000 OR  MORE PEOPLE.	1 WATER SAMPLE PER QUARTER PER TREATMENT PLANT2.	LOCATIONS REPRESENTING MAXIMUM RESIDENCE TIME1.
SYSTEM USING ONLY GROUND WATER NOT UNDER DIRECT INFLUENCE OF SURFACE WATER USING CHEMICAL DISINFECTANT AND SERVING FEWER THAN 10,000 PEOPLE.	1 SAMPLE PER YEAR PER TREATMENT PLANT2 DURING MONTH OF WARMEST WATER TEMPERATURE.	LOCATIONS REPRESENTING MAXIMUM RESIDENCE TIME1. IF THE SAMPLE (OR AVERAGE OF ANNUAL SAMPLES, IF MORE THAN 1 SAMPLE IS TAKEN) EXCEEDS THE MCL, THE SYSTEM SHALL INCREASE MONITORING TO 1 SAMPLE PER TREATMENT PLANT PER QUARTER, TAKEN AT A POINT REFLECTING THE MAXIMUM RESIDENCE TIME IN THE DISTRIBUTION SYSTEM, UNTIL THE SYSTEM MEETS CRITERIA IN PARAGRAPH (iv) OF THIS SUBDIVISION.

1 IF A SUPPLIER ELECTS TO SAMPLE MORE FREQUENTLY THAN THE MINIMUM REQUIRED, NOT LESS THAN 25%

OF ALL SAMPLES COLLECTED EACH QUARTER, INCLUDING THOSE TAKEN IN EXCESS OF THE REQUIRED FREQUENCY, SHALL BE TAKEN AT LOCATIONS THAT REPRESENT THE MAXIMUM RESIDENCE TIME OF THE WATER IN THE DISTRIBUTION SYSTEM. THE REMAINING SAMPLES SHALL BE TAKEN AT LOCATIONS REPRESENTATIVE OF AT LEAST AVERAGE RESIDENCE TIME IN THE DISTRIBUTION SYSTEM.

 

 

177

2002 MR 15 – September 1, 2002

 

 

2 MULTIPLE WELLS DRAWING WATER FROM A SINGLE AQUIFER MAY BE CONSIDERED 1 TREATMENT PLANT FOR DETERMINING THE MINIMUM NUMBER OF SAMPLES REQUIRED, WITH DEPARTMENT APPROVAL.

 

(ii)  SUPPLIERS MAY REDUCE MONITORING, EXCEPT AS OTHERWISE PROVIDED, UNDER TABLE 2 OF THIS RULE: TABLE 2 REDUCED MONITORING FREQUENCY FOR TTHM AND HAA5

IF THE SYSTEM IS A...	THE SUPPLIER MAY REDUCE MONITORING IF THE SUPPLIER HAS MONITORED AT LEAST 1 YEAR AND THE...	TO THIS LEVEL
SUBPART H SYSTEM SERVING 10,000 OR	TTHM ANNUAL AVERAGE IS LESS	1 SAMPLE PER TREATMENT PLANT PER QUARTER AT
MORE PEOPLE WHICH HAS A SOURCE	THAN OR EQUAL TO 0.040 MG/L AND	DISTRIBUTION SYSTEM LOCATION REFLECTING MAXIMUM
WATER ANNUAL AVERAGE TOC LEVEL,	HAA5 ANNUAL AVERAGE IS LESS	RESIDENCE TIME.
BEFORE ANY TREATMENT, THAT IS LESS	THAN OR EQUAL TO 0.030 MG/L.
THAN OR EQUAL TO 4.0 MG/L.
SUBPART H SYSTEM SERVING FROM 500	TTHM ANNUAL AVERAGE IS LESS	1 SAMPLE PER TREATMENT PLANT PER YEAR AT
TO 9,999 PEOPLE WHICH HAS A SOURCE	THAN OR EQUAL TO 0.040 MG/L AND	DISTRIBUTION SYSTEM LOCATION REFLECTING MAXIMUM
WATER ANNUAL AVERAGE TOC LEVEL,	HAA5 ANNUAL AVERAGE IS LESS	RESIDENCE TIME DURING MONTH OF WARMEST WATER
BEFORE ANY TREATMENT, THAT IS LESS	THAN OR EQUAL TO 0.030 MG/L.	TEMPERATURE. NOTE: ANY SUBPART H SYSTEM SERVING
THAN OR EQUAL TO 4.0 MG/L.		FEWER THAN 500 PEOPLE MAY NOT REDUCE ITS
		MONITORING TO LESS THAN 1 SAMPLE PER TREATMENT
		PLANT PER YEAR.
SYSTEM USING ONLY GROUND WATER	TTHM ANNUAL AVERAGE IS LESS	1 SAMPLE PER TREATMENT PLANT PER YEAR AT
NOT UNDER DIRECT INFLUENCE OF	THAN OR EQUAL TO 0.040 MG/L AND	DISTRIBUTION SYSTEM LOCATION REFLECTING MAXIMUM
SURFACE WATER USING CHEMICAL	HAA5 ANNUAL AVERAGE IS LESS	RESIDENCE TIME DURING MONTH OF WARMEST WATER
DISINFECTANT AND SERVING 10,000 OR	THAN OR EQUAL TO 0.030 MG/L.	TEMPERATURE.
MORE PEOPLE.
SYSTEM USING ONLY GROUND WATER NOT UNDER DIRECT INFLUENCE OF SURFACE WATER USING CHEMICAL DISINFECTANT AND SERVING FEWER THAN 10,000 PEOPLE.	TTHM ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.040 MG/L AND HAA5 ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.030 MG/L FOR 2 CONSECUTIVE YEARS, OR TTHM ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.020 MG/L AND HAA5 ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.015 MG/L FOR 1 YEAR.	1 SAMPLE PER TREATMENT PLANT PER 3 YEAR MONITORING CYCLE AT DISTRIBUTION SYSTEM LOCATION REFLECTING MAXIMUM RESIDENCE TIME DURING MONTH OF WARMEST WATER TEMPERATURE, WITH THE 3-YEAR CYCLE BEGINNING ON JANUARY 1 FOLLOWING QUARTER IN WHICH SYSTEM QUALIFIES FOR REDUCED MONITORING.

 

 

 

 

 

 

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(iii)     SUPPLIERS OF SYSTEMS ON A REDUCED MONITORING SCHEDULE MAY REMAIN ON THAT REDUCED SCHEDULE AS LONG AS THE AVERAGE OF ALL SAMPLES TAKEN IN THE YEAR, FOR SYSTEMS MONITORING QUARTERLY, OR THE RESULT OF THE SAMPLE, FOR SYSTEMS MONITORING NO MORE FREQUENTLY THAN ANNUALLY, IS NOT MORE THAN 0.060 MG/L AND 0.045 MG/L FOR TTHM AND HAA5, RESPECTIVELY. SUPPLIERS OF SYSTEMS THAT DO NOT MEET THESE LEVELS SHALL RESUME MONITORING AT THE FREQUENCY IDENTIFIED IN THE "MINIMUM MONITORING FREQUENCY" COLUMN OF TABLE 1 OF THIS RULE, IN THE QUARTER IMMEDIATELY FOLLOWING THE MONITORING PERIOD IN WHICH THE SYSTEM EXCEEDS 0.060 MG/L AND 0.045 MG/L FOR TTHM AND HAA5, RESPECTIVELY. FOR SYSTEMS USING ONLY GROUNDWATER NOT UNDER THE DIRECT INFLUENCE OF SURFACE WATER AND SERVING FEWER THAN 10,000 PEOPLE, IF EITHER THE TTHM ANNUAL AVERAGE IS GREATER THAN

0.080 MG/L OR THE HAA5 ANNUAL AVERAGE IS GREATER THAN 0.060 MG/L, THE SUPPLIER SHALL INCREASE MONITORING TO THAT IDENTIFIED IN THE "SAMPLE LOCATION IN THE DISTRIBUTION SYSTEM" COLUMN OF TABLE 1 OF THIS RULE IN THE QUARTER IMMEDIATELY FOLLOWING THE MONITORING PERIOD IN WHICH THE SYSTEM EXCEEDS 0.080 MG/L OR 0.060 MG/L FOR TTHM OR HAA5, RESPECTIVELY.

(iv)    SUPPLIERS OF SYSTEMS ON INCREASED MONITORING MAY RETURN TO ROUTINE MONITORING IF, AFTER AT LEAST 1 YEAR OF MONITORING, THE TTHM ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.060 MG/L AND THE HAA5 ANNUAL AVERAGE IS LESS THAN OR EQUAL TO 0.045 MG/L.

(b)   SUPPLIERS OF COMMUNITY AND NONTRANSIENT NONCOMMUNITY WATER SYSTEMS ADDING CHLORINE DIOXIDE SHALL CONDUCT MONITORING FOR CHLORITE UNDER ALL OF THE FOLLOWING PROVISIONS.

(i)        ALL OF THE FOLLOWING PROVISIONS ARE ROUTINE MONITORING REQUIREMENTS:

(A)   EACH DAY, SUPPLIERS SHALL TAKE SAMPLES AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM. FOR ANY DAILY SAMPLE THAT EXCEEDS THE CHLORITE MCL, THE SUPPLIER SHALL TAKE ADDITIONAL SAMPLES IN THE DISTRIBUTION SYSTEM THE FOLLOWING DAY AT THE LOCATIONS  REQUIRED  BY PARAGRAPH (ii) OF THIS SUBDIVISION, IN ADDITION TO THE SAMPLE REQUIRED AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM.

(B)       EACH MONTH, SUPPLIERS SHALL TAKE A 3-SAMPLE SET IN THE DISTRIBUTION SYSTEM. THE SUPPLIER SHALL TAKE 1 SAMPLE AT EACH OF THE FOLLOWING LOCATIONS:

(1)  NEAR THE FIRST CUSTOMER.

(2)  AT A LOCATION REPRESENTATIVE OF AVERAGE RESIDENCE TIME.

(3)   AT A LOCATION REFLECTING MAXIMUM RESIDENCE IN THE DISTRIBUTION SYSTEM.

ANY ADDITIONAL ROUTINE SAMPLING SHALL BE CONDUCTED IN THE SAME MANNER, AS 3-SAMPLE SETS, AT THE SPECIFIED LOCATIONS. THE SUPPLIER MAY  USE  THE  RESULTS  OF  ADDITIONAL  MONITORING  CONDUCTED  UNDER

 

 

PARAGRAPH (ii) OF THIS SUBDIVISION TO MEET THE REQUIREMENT FOR MONITORING IN THIS PARAGRAPH.

(ii)   ON EACH DAY FOLLOWING A ROUTINE SAMPLE MONITORING RESULT THAT EXCEEDS THE CHLORITE MCL AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM, THE SUPPLIER SHALL TAKE 3 CHLORITE DISTRIBUTION SYSTEM SAMPLES AT EACH OF THE FOLLOWING LOCATIONS:

(A)  AS CLOSE TO THE FIRST CUSTOMER AS POSSIBLE.

(B)  IN A LOCATION REPRESENTATIVE OF AVERAGE RESIDENCE TIME.

(C)     AS CLOSE TO THE END OF THE DISTRIBUTION SYSTEM AS POSSIBLE, REFLECTING MAXIMUM RESIDENCE TIME IN THE DISTRIBUTION SYSTEM.

(iii)   CHLORITE MONITORING AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM REQUIRED BY PARAGRAPH (i)(A) OF THIS SUBDIVISION MAY NOT BE REDUCED. CHLORITE MONITORING IN THE DISTRIBUTION SYSTEM REQUIRED BY PARAGRAPH (i)(B) OF THIS SUBDIVISION MAY BE REDUCED TO 13-SAMPLE SET PER QUARTER AFTER 1 YEAR OF MONITORING WHERE NO INDIVIDUAL CHLORITE SAMPLE TAKEN IN THE DISTRIBUTION SYSTEM UNDER PARAGRAPH (i)(B) OF THIS SUBDIVISION HAS EXCEEDED THE CHLORITE MCL AND THE SUPPLIER HAS NOT BEEN REQUIRED TO CONDUCT MONITORING UNDER PARAGRAPH (ii) OF THIS SUBDIVISION. THE SYSTEM MAY REMAIN ON THE   REDUCED    MONITORING    SCHEDULE    UNTIL    EITHER    ANY    OF    THE 3 INDIVIDUAL CHLORITE SAMPLES TAKEN QUARTERLY IN THE DISTRIBUTION SYSTEM UNDER PARAGRAPH (i)(B) OF THIS SUBDIVISION EXCEEDS THE CHLORITE MCL OR THE SUPPLIER IS REQUIRED TO CONDUCT MONITORING UNDER PARAGRAPH (ii) OF THIS SUBDIVISION, AT WHICH TIME THE SUPPLIER SHALL REVERT TO ROUTINE MONITORING.

(c)     SUPPLIERS USING  OZONE  SHALL  MONITOR  FOR  BROMATE  BY  TAKING 1 SAMPLE PER MONTH AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM FOR EACH TREATMENT PLANT IN THE SYSTEM USING OZONE. MONITORING MAY NOT BE REDUCED.

(3)   BOTH OF THE FOLLOWING PROVISIONS ARE MONITORING REQUIREMENTS FOR DISINFECTANT RESIDUALS:

(a)   SUPPLIERS OF COMMUNITY AND NONTRANSIENT NONCOMMUNITY WATER SYSTEMS ADDING CHLORINE OR CHLORAMINES SHALL MEASURE THE RESIDUAL DISINFECTANT LEVEL IN THE DISTRIBUTION SYSTEM AT THE SAME POINT IN THE DISTRIBUTION SYSTEM AND AT THE SAME TIME AS TOTAL COLIFORMS ARE SAMPLED, AS SPECIFIED IN R 325.10705 AND R 325.10706. MONITORING MAY NOT BE REDUCED.

(b)  ALL OF THE FOLLOWING PROVISIONS ARE CHLORINE DIOXIDE MONITORING REQUIREMENTS:

(i)        SUPPLIERS OF COMMUNITY, NONTRANSIENT NONCOMMUNITY, AND TRANSIENT NONCOMMUNITY WATER SYSTEMS THAT USE CHLORINE DIOXIDE SHALL MONITOR FOR CHLORINE DIOXIDE BY TAKING DAILY SAMPLES AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM. FOR ANY DAILY SAMPLE THAT EXCEEDS THE MRDL, THE SUPPLIER SHALL TAKE SAMPLES IN THE DISTRIBUTION SYSTEM    THE    FOLLOWING    DAY    AT    THE    LOCATIONS    REQUIRED    BY

 

 

PARAGRAPH (ii) OF THIS SUBDIVISION, IN ADDITION TO THE SAMPLE REQUIRED AT THE ENTRANCE TO THE DISTRIBUTION SYSTEM.

(ii)   ON EACH DAY FOLLOWING A ROUTINE SAMPLE MONITORING RESULT THAT EXCEEDS THE MRDL, THE SUPPLIER IS REQUIRED TO TAKE 3 CHLORINE DIOXIDE DISTRIBUTION SYSTEM SAMPLES. IF CHLORINE DIOXIDE OR CHLORAMINES ARE USED TO MAINTAIN A DISINFECTANT RESIDUAL IN THE DISTRIBUTION SYSTEM, OR IF CHLORINE IS USED TO MAINTAIN A DISINFECTANT RESIDUAL IN THE DISTRIBUTION SYSTEM AND THERE ARE NO DISINFECTION ADDITION POINTS AFTER THE ENTRANCE TO THE DISTRIBUTION SYSTEM, THAT IS, NO BOOSTER CHLORINATION, THE SUPPLIER SHALL TAKE 3 SAMPLES AS CLOSE TO THE FIRST CUSTOMER AS POSSIBLE, AT INTERVALS OF AT LEAST 6 HOURS. IF CHLORINE IS USED TO MAINTAIN A DISINFECTANT RESIDUAL IN THE DISTRIBUTION SYSTEM AND THERE ARE 1 OR MORE DISINFECTION ADDITION POINTS AFTER THE ENTRANCE TO THE DISTRIBUTION SYSTEM, THAT IS, BOOSTER CHLORINATION, THE SUPPLIER SHALL TAKE 1 SAMPLE AT EACH OF THE FOLLOWING LOCATIONS:

(A)  AS CLOSE TO THE FIRST CUSTOMER AS POSSIBLE.

(B)  IN A LOCATION REPRESENTATIVE OF AVERAGE RESIDENCE TIME.

(C)     AS CLOSE TO THE END OF THE DISTRIBUTION SYSTEM AS POSSIBLE, REFLECTING MAXIMUM RESIDENCE TIME IN THE DISTRIBUTION SYSTEM.

(iii)  CHLORINE DIOXIDE MONITORING MAY NOT BE REDUCED.

(4)  MONITORING REQUIREMENTS FOR DISINFECTION BYPRODUCT PRECURSORS (DBPP) ARE AS FOLLOWS:

(a)     SUPPLIERS OF SUBPART H SYSTEMS USING CONVENTIONAL FILTRATION SHALL MONITOR EACH TREATMENT PLANT FOR TOC NOT LATER THAN THE POINT OF COMBINED FILTER EFFLUENT TURBIDITY MONITORING AND REPRESENTATIVE OF THE TREATED WATER. SUPPLIERS SHALL ALSO MONITOR FOR TOC IN THE SOURCE WATER BEFORE ANY TREATMENT AT THE SAME TIME AS MONITORING FOR TOC IN THE TREATED WATER. THESE SAMPLES (SOURCE WATER AND TREATED WATER) ARE REFERRED TO AS “PAIRED SAMPLES.” AT THE SAME TIME AS THE SOURCE WATER SAMPLE IS TAKEN, SUPPLIERS SHALL MONITOR FOR ALKALINITY IN THE SOURCE WATER BEFORE ANY TREATMENT. SUPPLIERS SHALL TAKE 1 PAIRED SAMPLE AND 1 SOURCE WATER ALKALINITY SAMPLE PER MONTH PER PLANT AT A TIME REPRESENTATIVE OF NORMAL OPERATING CONDITIONS AND INFLUENT WATER QUALITY.

(b)    SUPPLIERS OF SUBPART H SYSTEMS WITH AN AVERAGE TREATED WATER TOC  OF  LESS  THAN  2.0 MG/L  FOR  2 CONSECUTIVE  YEARS,  OR  LESS  THAN

1.0 MG/L FOR 1 YEAR, MAY REDUCE MONITORING FOR BOTH TOC AND ALKALINITY TO 1 PAIRED SAMPLE AND 1 SOURCE WATER ALKALINITY SAMPLE PER PLANT PER QUARTER. THE SUPPLIER SHALL REVERT TO ROUTINE MONITORING IN THE MONTH FOLLOWING THE QUARTER WHEN THE ANNUAL AVERAGE TREATED WATER TOC IS GREATER THAN OR EQUAL TO 2.0 MG/L.

(5)    SUPPLIERS SUBJECT TO THIS RULE SHALL DEVELOP AND IMPLEMENT A MONITORING PLAN. THE SUPPLIER SHALL MAINTAIN THE PLAN AND MAKE IT AVAILABLE FOR INSPECTION BY THE DEPARTMENT AND THE GENERAL PUBLIC

 

 

NOT MORE THAN 30 DAYS FOLLOWING THE APPLICABLE COMPLIANCE DATES IN SUBRULE (1) OF THIS RULE. SUPPLIERS OF SUBPART H SYSTEMS SERVING MORE THAN 3,300 PEOPLE SHALL SUBMIT A COPY OF THE MONITORING PLAN TO THE DEPARTMENT NOT LATER THAN THE DATE OF THE FIRST REPORT REQUIRED UNDER R 325.10719f. AT A MINIMUM, THE PLAN SHALL INCLUDE ALL OF THE FOLLOWING ELEMENTS:

(a)     SPECIFIC LOCATIONS AND SCHEDULES FOR COLLECTING SAMPLES FOR PARAMETERS INCLUDED IN R 325.10610, R 325.10610a, R 325.10610b, R325.10610c, OR THIS RULE.

(b)   THE METHOD THE SUPPLIER WILL USE TO CALCULATE COMPLIANCE WITH MCLS, MRDLS, AND TREATMENT TECHNIQUES.

(c)      IF APPROVED FOR MONITORING AS A CONSECUTIVE SYSTEM, OR IF PROVIDING WATER TO A CONSECUTIVE  SYSTEM,  UNDER  THE  PROVISIONS OF R 325.10733, THE SAMPLING PLAN SHALL REFLECT THE ENTIRE DISTRIBUTION SYSTEM.

 

R 325.10719f DISINFECTANT RESIDUALS, DISINFECTION BYPRODUCTS, AND DISINFECTION BYPRODUCT PRECURSORS; REPORTING AND RECORDKEEPING.

RULE 719f. (1) SUPPLIERS REQUIRED TO MONITOR UNDER R 325.10719e SHALL REPORT TO THE DEPARTMENT UNDER THIS RULE. SUPPLIERS REQUIRED TO SAMPLE QUARTERLY OR MORE FREQUENTLY SHALL REPORT TO THE DEPARTMENT WITHIN 10 DAYS AFTER THE END OF EACH QUARTER IN WHICH SAMPLES  WERE   COLLECTED,   NOTWITHSTANDING   THE   PROVISIONS   OF R 325.10734. SUPPLIERS REQUIRED TO SAMPLE LESS FREQUENTLY THAN QUARTERLY SHALL REPORT TO THE DEPARTMENT WITHIN 10 DAYS AFTER THE END OF EACH MONITORING PERIOD IN WHICH SAMPLES WERE COLLECTED.

 

 

(2) SUPPLIERS SHALL REPORT DISINFECTION BYPRODUCTS INFORMATION SPECIFIED IN THE FOLLOWING TABLE:

 

IF SUPPLIER MONITORS UNDER R 325.10719e(2) FOR...	SUPPLIER SHALL REPORT...
(a) TTHM AND HAA5 ON A QUARTERLY OR MORE FREQUENT BASIS	(i)  THE NUMBER OF SAMPLES TAKEN DURING THE LAST QUARTER.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH SAMPLE TAKEN DURING THE LAST QUARTER.   (iii)  THE AVERAGE OF ALL SAMPLES TAKEN IN THE LAST QUARTER.   (iv) THE ANNUAL AVERAGE OF THE QUARTERLY AVERAGES OF THIS SECTION FOR THE LAST 4 QUARTERS. (v) WHETHER, BASED ON R 325.10610b(2)(a), THE MCL WAS VIOLATED.
(b) TTHM AND HAA5 LESS FREQUENTLY THAN QUARTERLY, BUT AT LEAST ANNUALLY	(i)  THE NUMBER OF SAMPLES TAKEN DURING THE LAST YEAR.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH SAMPLE TAKEN DURING THE LAST MONITORING PERIOD. (iii)  THE AVERAGE OF ALL SAMPLES TAKEN OVER THE LAST YEAR.   (iv) WHETHER, BASED ON R 325.10610b(2)(a), THE MCL WAS VIOLATED.
(c) TTHM AND HAA5 LESS FREQUENTLY THAN ANNUALLY	(i)  THE LOCATION, DATE, AND RESULT OF THE EACH SAMPLE TAKEN.   (ii)  WHETHER, BASED ON R 325.10610b(2)(a), THE MCL WAS VIOLATED.

 

 

IF SUPPLIER MONITORS UNDER R 325.10719e(2) FOR...	SUPPLIER SHALL REPORT...
(d) CHLORITE	(i)  THE NUMBER OF ENTRY POINT SAMPLES TAKEN EACH MONTH FOR THE LAST 3 MONTHS.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH SAMPLE (BOTH ENTRY POINT AND DISTRIBUTION SYSTEM) TAKEN DURING THE LAST QUARTER. (iii)  FOR EACH MONTH IN THE REPORTING PERIOD, THE AVERAGE OF ALL SAMPLES TAKEN IN EACH 3-SAMPLES SET TAKEN IN THE DISTRIBUTION SYSTEM. (iv) WHETHER, BASED ON R 325.10610b(2)(c), THE MCL WAS VIOLATED, IN WHICH MONTH, AND HOW MANY TIMES IT WAS VIOLATED EACH MONTH.
(e) BROMATE	(i)  THE NUMBER OF SAMPLES TAKEN DURING THE LAST QUARTER.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH SAMPLE TAKEN DURING THE LAST QUARTER.   (iii)  THE AVERAGE OF THE MONTHLY AVERAGES OF ALL SAMPLES TAKEN IN THE LAST YEAR.   (iv) WHETHER, BASED ON R 325.10610b(2)(b), THE MCL WAS VIOLATED.

 

 

(3) SUPPLIERS SHALL REPORT DISINFECTANT INFORMATION SPECIFIED IN THE FOLLOWING TABLE:

 

IF SUPPLIER MONITORS UNDER R 325.10719e(3) FOR...	SUPPLIER SHALL REPORT...
(a) CHLORINE OR CHLORAMINES	(i)  THE NUMBER OF SAMPLES TAKEN DURING EACH MONTH OF THE LAST QUARTER.   (ii)  THE MONTHLY AVERAGE OF ALL SAMPLES TAKEN IN EACH MONTH FOR THE LAST 12 MONTHS.   (iii)  THE AVERAGE OF ALL MONTHLY AVERAGES FOR THE LAST 12 MONTHS.   (iv) WHETHER, BASED ON R 325.10610b(3)(a), THE MRDL WAS VIOLATED.
(b) CHLORINE DIOXIDE	(i)  THE DATES, RESULTS, AND LOCATIONS OF SAMPLES TAKEN DURING THE LAST QUARTER.   (ii)  WHETHER, BASED ON R 325.10610(3)(b), THE MRDL WAS VIOLATED.   (iii)  WHETHER THE MRDL WAS EXCEEDED IN ANY 2 CONSECUTIVE DAILY SAMPLES AND WHETHER THE RESULTING VIOLATION WAS A TIER 1 OR TIER 2 VIOLATION.

 

 

(4) SUPPLIERS SHALL REPORT DISINFECTION BYPRODUCT PRECURSORS AND ENHANCED COAGULATION OR ENHANCED SOFTENING INFORMATION SPECIFIED IN THE FOLLOWING TABLE:

IF SUPPLIER MONITORS MONTHLY OR QUARTERLY FOR TOC UNDER R 325.10719e(4)...

SUPPLIER SHALL REPORT...

(a) AND IS REQUIRED TO MEET THE ENHANCED COAGULATION OR ENHANCED SOFTENING REQUIREMENTS IN R 325.10610c(2)(b) OR (c)

(i)  THE NUMBER OF PAIRED SAMPLES TAKEN DURING THE LAST QUARTER.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH PAIRED SAMPLE AND ASSOCIATED ALKALINITY TAKEN DURING THE LAST QUARTER. (iii)  FOR EACH MONTH IN THE REPORTING PERIOD THAT PAIRED SAMPLES WERE TAKEN, THE AVERAGE OF THE PERCENT REDUCTION OF TOC FOR EACH PAIRED SAMPLE AND THE REQUIRED TOC PERCENT REMOVAL. (iv) CALCULATIONS FOR DETERMINING COMPLIANCE WITH THE TOC PERCENT REMOVAL REQUIREMENTS, AS PROVIDED IN R 325.10610c(3)(a). (v) WHETHER THE SYSTEM IS IN COMPLIANCE WITH THE ENHANCED COAGULATION OR ENHANCED SOFTENING PERCENT REMOVAL REQUIREMENTS IN R 325.10610c(2) FOR THE LAST 4 QUARTERS.

 

 

IF SUPPLIER MONITORS MONTHLY OR QUARTERLY FOR TOC UNDER R 325.10719e(4)...

SUPPLIER SHALL REPORT...

(b) AND MEETS 1 OR MORE OF THE ALTERNATIVE COMPLIANCE CRITERIA IN R 325.10610c(1)(b) OR (c)

(i)  THE NUMBER OF PAIRED SAMPLES TAKEN DURING THE LAST QUARTER.   (ii)  THE LOCATION, DATE, AND RESULT OF EACH PAIRED SAMPLE AND ASSOCIATED ALKALINITY TAKEN DURING THE LAST QUARTER. (iii)  THE ALTERNATIVE COMPLIANCE CRITERION THAT THE SYSTEM IS USING.   (iv) THE RUNNING ANNUAL AVERAGE BASED ON MONTHLY AVERAGES, OR QUARTERLY SAMPLES, OF SOURCE WATER TOC FOR SYSTEMS MEETING A CRITERION IN R 325.10610c(1)(b)(i) OR (iii) OR OF TREATED WATER TOC FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(b)(ii). (v) THE RUNNING ANNUAL AVERAGE BASED ON MONTHLY AVERAGES, OR QUARTERLY SAMPLES, OF SOURCE WATER SUVA FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(b)(v) OR OF TREATED WATER SUVA FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(b)(vi). (vi) THE RUNNING ANNUAL AVERAGE OF SOURCE WATER ALKALINITY FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(b)(iii) AND OF TREATED WATER ALKALINITY FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(c)(i).   (vii)  THE RUNNING ANNUAL AVERAGE FOR BOTH TTHM AND HAA5 FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(b)(iii). (viii)  THE RUNNING ANNUAL AVERAGE OF THE AMOUNT OF MAGNESIUM HARDNESS REMOVAL, AS CALCIUM CARBONATE, IN MG/L, FOR SYSTEMS MEETING THE CRITERION IN R 325.10610c(1)(c)(ii). (ix) WHETHER THE SYSTEM IS IN COMPLIANCE WITH THE PARTICULAR ALTERNATIVE COMPLIANCE CRITERION IN R 325.10610c(1)(b) OR (c).               187

 

 

R 325.10720 Collecting, measuring, and reporting of samples for turbidity and residual disinfectant monitoring; effective date of subrules (2) to (10). FILTRATION AND DISINFECTION; FILTRATION SAMPLING REQUIREMENTS

Rule 720. (1) Suppliers of SUBPART H SYSTEMS SHALL MONITOR UNDER THIS RULE TO DETERMINE COMPLIANCE WITH R 325.10611a AND R 325.10611b, EXCEPT FOR THE SYSTEMS

NOTED IN SUBRULE (4) OF THIS RULE. water of all type I and type II public water supplies utilizing surface water sources shall collect samples and perform measurements for turbidity at representative entry points to the water distribution system. Measurements for turbidity shall be used to determine compliance with state drinking water standards until June 29, 1993. After June 29, 1993, turbidity measurements shall be used to determine compliance with treatment technique requirements. This rule applies to all suppliers of water that utilize sources of water which require complete treatment.

(2)   ALL OF THE FOLLOWING PROVISIONS ARE TURBIDITY MONITORING REQUIREMENTS: This subrule and subrules (3) to (10) of this rule are effective June 29, 1993. A supplier of water that utilizes a source of water which requires complete treatment shall collect samples and perform measurements for turbidity at a representative entry point to the water distribution system to determine compliance with the treatment technique requirements pursuant to the provisions of R 325.11004(4).

(3)   A supplier of water that utilizes a source of water which requires complete treatment shall collect and analyze samples at regular intervals at least once every 4 hours while the treatment plant is in operation to determine compliance with the treatment technique requirements pursuant to the provisions of R 325.11004(4).

(a)  SUPPLIERS SHALL COLLECT SAMPLES AND PERFORM MEASUREMENTS FOR TURBIDITY AT LOCATIONS REPRESENTATIVE OF FILTERED WATER AT REGULAR INTERVALS AT LEAST ONCE EVERY 4 HOURS WHILE THE TREATMENT PLANT IS IN OPERATION.

(4)   (b) If any single measurement is more than 5.0 turbidity units NTU FOR SYSTEMS SERVING FEWER THAN 10,000 PEOPLE, OR 1 NTU FOR SYSTEMS SERVING 10,000 OR MORE PEOPLE, a supplier of water shall notify the division DEPARTMENT as soon as possible, but not later than the end of the next business day 24 HOURS AFTER THE EXCEEDANCE IS KNOWN.

(5)  (c) A public water supplier may substitute continuous turbidity monitoring for grab sample monitoring if the continuous measurement is validated for accuracy on a regular basis using a protocol approved by the division DEPARTMENT. Readings taken from a continuous recording turbidimeter at regular intervals at least once every 4 hours may be used to determine compliance with the treatment technique requirements pursuant to the provisions of R 325.11004(4) UNDER R 325.10611b. THE TURBIDIMETER SHALL BE CALIBRATED USING THE PROCEDURE SPECIFIED BY THE MANUFACTURER.

(d)        SUPPLIERS OF SYSTEMS SERVING 10,000 OR MORE PEOPLE AND USING CONVENTIONAL OR DIRECT FILTRATION SHALL CONDUCT CONTINUOUS MONITORING OF TURBIDITY FOR EACH INDIVIDUAL FILTER AND SHALL CALIBRATE TURBIDIMETERS USING THE PROCEDURE SPECIFIED BY THE MANUFACTURER. SUPPLIERS SHALL RECORD THE RESULTS OF INDIVIDUAL FILTER MONITORING EVERY 15 MINUTES.

(e)    IF THERE IS A FAILURE IN THE CONTINUOUS TURBIDITY MONITORING EQUIPMENT DESCRIBED IN SUBDIVISION (d) OF THIS SUBRULE, THE SUPPLIER SHALL CONDUCT GRAB SAMPLING EVERY 4 HOURS INSTEAD OF CONTINUOUS MONITORING, BUT FOR NOT MORE THAN 5 WORKING DAYS AFTER THE FAILURE OF THE EQUIPMENT.

(6)   (3) ALL OF THE FOLLOWING PROVISIONS ARE DISINFECTANT RESIDUAL MONITORING REQUIREMENTS AT THE ENTRY POINTS TO THE DISTRIBUTION SYSTEM:

 

 

(a)   A supplier of water that utilizes a source of water which requires complete treatment and that serves SUPPLIERS OF SYSTEMS SERVING more than 3,300 people shall monitor for residual disinfectant concentration at an entry point to the distribution system on a continuous basis.

(7)  (b) A supplier of water that utilizes a source of water which requires complete treatment and that serves less SUPPLIERS OF SYSTEMS SERVING FEWER than 3,301 people shall monitor for residual disinfectant concentration at an entry point to the distribution system at a frequency to be established by the department. The required frequency shall be SET FORTH IN TABLE 1 OF THIS RULE, AND, IF MORE THAN 1 SAMPLE IS REQUIRED PER DAY, SUPPLIERS SHALL COLLECT SAMPLES AT TIMES EVENLY SPACED THROUGHOUT THE OPERATIONAL DAY based on the anticipated source water quality, but the monitoring shall be at a frequency specified in table 7.5, which reads as follows.

Table 7.51 RESIDUAL DISINFECTANT CONCENTRATION SAMPLING FREQUENCIES

 

System Size by Population	Samples Per Daya
500 or fewer persons PEOPLE	1
501 to 1,000 persons PEOPLE	2
1,001 to 2,500 persons PEOPLE	3
2,501 to 3,300 persons PEOPLE	4

a The day's samples cannot be taken at the same time.

(8)  When disinfection is required other than for a system where complete treatment is required, a supplier of water shall monitor for residual disinfectant concentration at locations and frequencies determined by the department.

(9)  (c) A supplier of water that utilizes a source of water which requires complete treatment SUPPLIERS shall maintain a residual disinfectant concentration entering the distribution system of not less than 0.2 milligrams per liter. If the residual disinfectant concentration drops below this level at any time, the supplier of water shall notify the department as soon as possible, but not later than the end of the next business day. In addition, the supplier of water shall notify the department by the end of the next business day whether or not the residual disinfectant concentration was restored to not less than 0.2 milligrams per liter within 4 hours.

(10)  (4) When disinfection is required, a supplier of water shall measure disinfectant residual concentrations on the distribution system at the same points in the distribution system and at such time as samples are collected for coliform analysis. The department may require additional distribution residual monitoring to demonstrate operation adequate to protect the public health. AFTER DECEMBER 31, 2003, THIS SUBRULE NO LONGER APPLIES AND SYSTEMS SUBJECT TO THIS SUBRULE RULE SHALL COMPLY WITH THE DISINFECTANT RESIDUAL MONITORING REQUIREMENTS UNDER R 325.10719e(3).

 

R 325.10720a FILTRATION AND DISINFECTION; REPORTING AND RECORDKEEPING. RULE 720a. (1) SUPPLIERS REQUIRED TO MONITOR UNDER R 325.10720 SHALL COMPLY WITH REPORTING AND RECORDKEEPING REQUIREMENTS SPECIFIED IN R325.11502 AND SHALL REPORT TO THE DEPARTMENT THE INFORMATION REQUIRED IN THIS RULE WITHIN 10 DAYS AFTER THE END OF EACH MONTH THE SYSTEM SERVES WATER TO THE PUBLIC.

(2)  SUPPLIERS SHALL REPORT TURBIDITY MEASUREMENTS REQUIRED UNDER R 325.10611b AND SHALL INCLUDE ALL OF THE FOLLOWING INFORMATION:

(a)    THE TOTAL NUMBER OF TURBIDITY MEASUREMENTS TAKEN DURING THE MONTH REPRESENTATIVE OF FILTERED WATER.

(b)   THE NUMBER AND PERCENTAGE OF TURBIDITY MEASUREMENTS TAKEN DURING THE MONTH REPRESENTATIVE OF FILTERED WATER THAT ARE LESS THAN OR EQUAL TO THE TURBIDITY LIMITS UNDER R 325.10611b.

 

 

(c)        THE DATE AND VALUE OF ANY SAMPLES TAKEN DURING THE MONTH REPRESENTATIVE OF FILTERED WATER THAT EXCEED 1 NTU FOR SYSTEMS USING CONVENTIONAL FILTRATION, DIRECT FILTRATION, OR MEMBRANE FILTRATION, OR THAT EXCEED THE MAXIMUM LEVEL SET BY THE DEPARTMENT UNDER R 325.10611b(3).

(3)      SUPPLIERS SHALL REPORT THAT THEY HAVE CONDUCTED INDIVIDUAL FILTER TURBIDITY MONITORING UNDER R 325.10720(2)(d) AND (e). SUPPLIERS SHALL REPORT INDIVIDUAL TURBIDITY MEASUREMENTS ONLY IF MEASUREMENTS DEMONSTRATE 1 OR MORE OF THE CONDITIONS IN SUBDIVISIONS (a) TO (d) OF THIS SUBRULE. SYSTEMS THAT USE LIME SOFTENING MAY APPLY TO THE DEPARTMENT FOR ALTERNATIVE EXCEEDANCE LEVELS FOR THE LEVELS SPECIFIED IN SUBDIVISIONS (a) TO (d) OF THIS SUBRULE IF THEY CAN DEMONSTRATE THAT HIGHER TURBIDITY LEVELS IN INDIVIDUAL FILTERS ARE DUE TO LIME CARRYOVER ONLY AND NOT DUE TO DEGRADED FILTER PERFORMANCE. INDIVIDUAL FILTER MONITORING REPORTING REQUIREMENTS ARE AS FOLLOWS:

(a)   FOR ANY INDIVIDUAL FILTER THAT HAS A MEASURED TURBIDITY LEVEL OF MORE THAN 1.0 NTU IN 2 CONSECUTIVE MEASUREMENTS TAKEN 15 MINUTES APART, THE SUPPLIER SHALL REPORT THE FILTER NUMBER, THE TURBIDITY MEASUREMENT, AND THE DATE OR DATES ON WHICH THE EXCEEDANCE OCCURRED. IN ADDITION, THE SUPPLIER SHALL EITHER PRODUCE A FILTER PROFILE FOR THE FILTER WITHIN 7 DAYS OF THE EXCEEDANCE AND REPORT THAT THE PROFILE HAS BEEN PRODUCED, OR REPORT THE OBVIOUS REASON FOR THE EXCEEDANCE.

(b)   FOR ANY INDIVIDUAL FILTER THAT HAS A MEASURED TURBIDITY LEVEL OF MORE THAN 0.5 NTU IN 2 CONSECUTIVE MEASUREMENTS TAKEN 15 MINUTES APART AT THE END OF THE FIRST 4 HOURS OF CONTINUOUS FILTER OPERATION AFTER THE FILTER HAS BEEN BACKWASHED OR OTHERWISE TAKEN OFFLINE, THE SUPPLIER SHALL REPORT THE FILTER NUMBER, THE TURBIDITY, AND THE DATE OR DATES ON WHICH THE EXCEEDANCE OCCURRED. IN ADDITION, THE SUPPLIER SHALL EITHER PRODUCE A FILTER PROFILE FOR THE FILTER WITHIN 7 DAYS OF THE EXCEEDANCE AND REPORT THAT THE PROFILE HAS BEEN PRODUCED, OR REPORT THE OBVIOUS REASON FOR THE EXCEEDANCE.

(c)   FOR ANY INDIVIDUAL FILTER THAT HAS A MEASURED TURBIDITY LEVEL OF MORE THAN 1.0 NTU IN 2 CONSECUTIVE MEASUREMENTS TAKEN 15 MINUTES APART AT ANY TIME IN EACH OF 3 CONSECUTIVE MONTHS, THE SUPPLIER SHALL REPORT THE FILTER NUMBER, THE TURBIDITY MEASUREMENT, AND THE DATE OR DATES ON WHICH THE EXCEEDANCE OCCURRED. IN ADDITION, THE SUPPLIER SHALL CONDUCT A SELF-ASSESSMENT OF THE FILTER WITHIN 14 DAYS OF THE EXCEEDANCE AND REPORT THAT THE SELF-ASSESSMENT WAS CONDUCTED. THE SELF-ASSESSMENT SHALL CONSIST OF AT LEAST ALL OF THE FOLLOWING COMPONENTS:

(i)  ASSESSMENT OF FILTER PERFORMANCE; DEVELOPMENT OF A FILTER PROFILE.

(ii)  IDENTIFICATION AND PRIORITIZATION OF FACTORS LIMITING FILTER PERFORMANCE.

(iii) ASSESSMENT OF THE APPLICABILITY OF CORRECTIONS.

(iv) PREPARATION OF A FILTER SELF-ASSESSMENT REPORT.

(d)   FOR ANY INDIVIDUAL FILTER THAT HAS A MEASURED TURBIDITY LEVEL OF MORE THAN 2.0 NTU IN 2 CONSECUTIVE MEASUREMENTS TAKEN 15 MINUTES APART AT ANY TIME IN EACH OF 2 CONSECUTIVE MONTHS, THE SUPPLIER SHALL REPORT THE FILTER NUMBER, THE TURBIDITY MEASUREMENT, AND THE DATE OR DATES ON WHICH THE EXCEEDANCE  OCCURRED.  IN  ADDITION,  THE  SUPPLIER  SHALL  ARRANGE  FOR  THE

 

 

CONDUCT OF A COMPREHENSIVE PERFORMANCE EVALUATION BY THE DEPARTMENT OR A THIRD PARTY APPROVED BY THE DEPARTMENT NO LATER THAN 30 DAYS FOLLOWING THE EXCEEDANCE AND HAVE THE EVALUATION COMPLETED AND SUBMITTED TO THE DEPARTMENT NOT LATER THAN 90 DAYS FOLLOWING THE EXCEEDANCE.

(4)  THE SUPPLIER SHALL CONSULT WITH THE DEPARTMENT AS SOON AS PRACTICAL, BUT NOT LATER THAN 24 HOURS AFTER THE EXCEEDANCE IS KNOWN, IF THE TURBIDITY LEVEL OF REPRESENTATIVE SAMPLES OF FILTERED WATER AT ANY TIME EXCEEDS EITHER OF THE FOLLOWING LEVELS:

(a)    1 NTU IN A SYSTEM USING CONVENTIONAL FILTRATION, DIRECT FILTRATION, OR MEMBRANE FILTRATION, OR AT ANY TIME EXCEEDS 5 NTU IN A SYSTEM USING DIATOMACEOUS EARTH OR SLOW SAND FILTRATION.

(b)  THE MAXIMUM LEVEL SET BY THE DEPARTMENT UNDER R 325.10611b(3) FOR SYSTEMS USING FILTRATION TECHNOLOGIES OTHER THAN CONVENTIONAL FILTRATION, DIRECT FILTRATION, MEMBRANE FILTRATION, SLOW SAND FILTRATION, OR DIATOMACEOUS EARTH FILTRATION.

 

R 325.10721 Rescinded Turbidity resampling; reporting and notification; effective date of rule.

Rule 721. (1) This rule is effective until June 29, 1993.

(2)       If the result of a turbidity measurement pursuant to the provisions of R 325.10720 indicates that the MCL has been exceeded, the sampling and measurement shall be confirmed by resampling as soon as possible, preferably within 1 hour. The repeat sample shall be the sample used for the purpose of calculating the daily average and the monthly average.

(3)      Except as noted in subrule (2) of this rule, the daily average and monthly average shall be determined from the normally scheduled turbidity measurements and shall not include special purpose samples.

(4)        If the daily average of turbidity measurements exceeds the MCL, the supplier of water shall notify the division within 48 hours. If the monthly average of the daily turbidity measurements is more than the MCL or if the average of turbidity measurements taken on 2 consecutive days is more than 5 turbidity units, a supplier of water shall report to the division within 48 hours and shall make public notification as prescribed by part 4 of these rules.