The Department is adopting the federal Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 D/DBPR) that is incorporated in the federal regulations in the July 1, 2009, edition of 40 CFR 141. There were errors in the notice that was ...

 

DEPARTMENT OF ENVIRONMENTAL PROTECTION

RULE NO: RULE TITLE
62-550.310: Primary Drinking Water Standards: Maximum Contaminant Levels and Maximum Residual Disinfectant Levels
62-550.500: General Monitoring and Compliance Measurement Requirements for Contaminants and Disinfectant Residuals
PURPOSE, EFFECT AND SUMMARY: The Department is adopting the federal Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 D/DBPR) that is incorporated in the federal regulations in the July 1, 2009, edition of 40 CFR 141. There were errors in the notice that was published in the Florida Administrative Weekly on March 12, 2009, in the three tables incorporated into the two above-listed rules. These two rules are being withdrawn and that notice is published concurrent with this notice. The remaining rules that were noticed on March 12, 2009, are part of the Department’s adoption of the federal Stage 2 Disinfectants and Disinfection Byproducts Rule. Specifically, Rule 62-550.310, F.A.C., is being amended to expand the applicability of the chlorine and chloramine maximum residual disinfectant levels (MRDLs) in accordance with the Stage 2 D/DBPR; to clarify that the Stage 1 D/DBPR MCLs for total trihalomethanes (TTHM) and haloacetic acids five (HAA5) apply until the date specified for compliance with the Stage 2 D/DBPR MCLs for TTHM and HAA5; and to specify the Stage 2 D/DBPR MCLs for TTHM and HAA5, the water systems to which these MCLs apply, and the effective dates for these MCLs. Rule 62-550.500, F.A.C., is being amended to clarify that the monitoring and compliance measurement requirements in the Stage 2 D/DBPR take precedence over the general monitoring and compliance measurement requirements in Rule 62-550.500, F.A.C.
SPECIFIC AUTHORITY: 403.8055, 403.861(9) FS.
LAW IMPLEMENTED: 403.852(12), 403.853(1), (3), 403.859(1), 403.861(16), (17) FS.
THIS RULEMAKING IS UNDERTAKEN PURSUANT TO SECTION
403.8055, F.S. WRITTEN COMMENTS MAY BE SUBMITTED WITHIN 21 DAYS OF THE DATE OF THIS NOTICE TO: Virginia Harmon, Department of Environmental Protection, 2600 Blair Stone Road, M.S. 3520, Tallahassee, Florida 32399-2400, [e-mail]
SUBSTANTIALLY AFFECTED PERSONS MAY WITHIN 14 DAYS OF THE DATE OF THIS NOTICE, FILE AN OBJECTION TO THIS RULEMAKING WITH THE AGENCY. THE OBJECTION SHALL SPECIFY THE PORTIONS OF THE PROPOSED RULE TO WHICH THE PERSON OBJECTS AND THE SPECIFIC REASONS FOR THE OBJECTION.

THE FULL TEXT OF THE PROPOSED RULE IS:

DRINKING WATER STANDARDS, MONITORING, AND REPORTING

62-550.310 Primary Drinking Water Standards: Maximum Contaminant Levels and Maximum Residual Disinfectant Levels.

(These standards may also apply as ground water quality standards as referenced in Chapter 62-520, F.A.C.)

(1) No change.

(2) DISINFECTANT RESIDUALS – Except for the chlorine dioxide maximum residual disinfectant level, which applies to all public water systems using chlorine dioxide as a disinfectant or oxidant, this subsection applies only to community or non-transient non-community water systems adding a chemical disinfectant to the water in any part of the drinking water treatment process. Maximum residual disinfectant levels (MRDLs) are listed in Table 2, which is incorporated herein and appears at the end of this chapter. These MRDLs apply to the public water systems referenced below.

(a) The chlorine dioxide MRDL applies to all public water systems that add chlorine dioxide as a disinfectant or oxidant.

(b) The chlorine and chloramine MRDLs apply to all community or non-transient non-community water systems that add chlorine or chloramines to the water in any part of the drinking water treatment process.

(c) Effective [insert the effective date of these rule amendments], the chlorine and chloramine MRDLs apply to all consecutive community or consecutive non-transient non-community water systems that do not add chlorine or chloramines but deliver water that has been treated with chlorine or chloramines.

(3) DISINFECTION BYPRODUCTS – This subsection applies to all community or non-transient non-community water systems adding a chemical disinfectant to the water in any part of the drinking water treatment process. The Stage 1 maximum contaminant levels (MCLs) for disinfection byproducts. The disinfection byproduct maximum contaminant levels (MCLs) are listed in Table 3, which is incorporated herein and appears at the end of this chapter. These MCLs apply to the public water systems referenced below.

(a) The bromate MCL applies to community or non-transient non-community water systems that add ozone.

(b) The chlorite MCL applies to community or non-transient non-community water systems that add chlorine dioxide.

(c) The Stage 1 total trihalomethanes (TTHM) and haloacetic acids five (HAA5) MCLs apply to community or non-transient non-community water systems that add a chemical disinfectant to the water in any part of the drinking water treatment process. These Stage 1 MCLs apply until the appropriate date specified for Stage 2 compliance in paragraph (d) below.

(d) The Stage 2 TTHM and HAA5 MCLs apply to community or non-transient non-community water systems that use a primary or residual disinfectant other than ultraviolet light or deliver water that has been treated with a primary or residual disinfectant other than ultraviolet light. These Stage 2 MCLs apply beginning on the dates shown in the table below.

 

SYSTEM TYPE	COMPLIANCE DATE
SYSTEMS THAT ARE NOT PART OF A COMBINED DISTRIBUTION SYSTEM AND SYSTEMS THAT SERVE THE LARGEST POPULATION IN A COMBINED DISTRIBUTION SYSTEM
System serving 100,000 or more people	April 1, 2012
System serving 50,000 – 99,999 people	October 1, 2012
System serving 10,000 – 49,999 people	October 1, 2013
Ground water system serving less than 10,000 people or Subpart H system not treating any surface water source and serving less than 10,000 people	October 1, 2013
Subpart H system treating a surface water source and serving less than 10,000 people	October 1, 2013, if no Cryptosporidium monitoring is required under 40 CFR 141.701(a)(4) or October 1, 2014, if Cryptosporidium monitoring is required under 40 CFR 141.701(a)(4)
OTHER SYSTEMS THAT ARE PART OF A COMBINED DISTRIBUTION SYSTEM
Consecutive system or wholesale system	At the same time as the system with the earliest compliance date in the combined distribution system

(4) through (6) No change.

Rulemaking Specific Authority 403.8055, 403.861(9) FS. Law Implemented 403.852(12), 403.853(1) FS. History–New 11-19-87, Formerly 17-22.210, Amended 1-18-89, 5-7-90, 1-3-91, 1-1-93, 1-26-93, 7-4-93, Formerly 17-550.310, Amended 9-7-94, 8-1-00, 11-27-01, 4-14-03, 4-25-03, 11-28-04,________.

 

62-550.500 General Monitoring and Compliance Measurement Requirements for Contaminants and Disinfectant Residuals.

These general requirements shall apply unless other monitoring or compliance measurement requirements are specified in Rules 62-550.511 through 62-550.540, F.A.C., or Rules 62-550.821 and 62-550.822, F.A.C.

(1) No change.

(2) Monitoring Frequencies. Monitoring frequencies for each group of contaminants or disinfectant residuals are specified in Rules 62-550.511 through 62-550.520, F.A.C., plus Rule 62-550.821, F.A.C., and are summarized in Table 7 (effective date of this rule).

(3) Monitoring Schedule. Each public water system shall monitor at the time designated by this subsection during each compliance cycle and compliance period. Table 8 (effective date of this rule), summarizes when public water systems shall perform initial or routine monitoring.

(4) through (11) No change.

Rulemaking Specific Authority 403.8055, 403.861(9) FS. Law Implemented 403.853(1), (3), 403.859(1), 403.861(16), (17) FS. History–New 11-19-87, Formerly 17-22.300, Amended 1-18-89, 5-7-90, 1-1-93, 1-26-93, 7-4-93, Formerly 17-550.500, Amended 9-7-94, 8-1-00, 11-27-01, 4-14-03, 11-28-04,________.

 

STAGE 1 MAXIMUM CONTAMINANT LEVELS FOR DISINFECTION BYPRODUCTS TABLE 3: [insert the effective date of these rule amendments]
FEDERAL CONTAMINANT ID NUMBER	CONTAMINANT	MCL (mg/L)
2950	Total Trihalomethanes (TTHM)	Stage 1: 0.080 with compliance determined based on the RAA for the system 1 Stage 2: 0.080 with compliance determined based on the LRAA at each monitoring location2
2456	Haloacetic Acids (Five) (HAA5)	Stage 1: 0.060 with compliance determined based on the RAA for the system 1 Stage 2: 0.060 with compliance determined based on the LRAA at each monitoring location2
1011	Bromate	0.010
1009	Chlorite	1.0

 

1 For further details regarding compliance determinations, see 40 CFR 141.133(b)(1), which is incorporated by reference in Rule 62-550.821, F.A.C.

2 For further details regarding compliance determinations, see 40 CFR 141.620(c)(7) and (d), which are incorporated by reference in Rule 62-550.822, F.A.C.

Abbreviations Used:MCL = maximum contaminant level;

mg/L = milligrams per liter;.

RAA = running annual average;

LRAA = locational running annual average.

 

TABLE 7: MONITORING FREQUENCIES AND LOCATIONS: [insert the effective date of these rule amendments]
CONTAMINANT OR DISINFECTANT RESIDUAL GROUP	APPLICABILITY	INITIAL OR ROUTINE MONITORING		TRIGGER THAT INCREASES MONITORING	INCREASED MONITORING		TRIGGER THAT REDUCES MONITORING	REDUCED MONITORING		MONITORING LOCATION(S)
		GWSs SYSTEMS	SUBPART H SYSTEMS		GWSs SYSTEMS	SUBPART H SYSTEMS		GWSs SYSTEMS	SUBPART H SYSTEMS
ASBESTOS RULE 62-550.511	CWSs, NTNCWSs	1 SAMPLE EVERY 9 YEARS		SAMPLE > MCL	1 SAMPLE QUARTERLY		SYSTEM NOT SUSCEPTIBLE	NO SAMPLING REQUIRED		NOTE 1
NITRATE & NITRITE RULES 62-550.500(5) & 62-550.512	CWSs, NTNCWSs	1 SAMPLE ANNUALLY	1 SAMPLE QUARTERLY	GWS SYS. WITH SAMPLE > 50% OF MCL	1 SAMPLE QUARTERLY		SUBPART H SYS. WITH EACH OF 4 MOST RECENT QUARTERLY SAMPLES < 50% OF MCL	---	1 SAMPLE ANNUALLY DURING QUARTER WITH HIGHEST RESULT	EVERY ENTRY POINT TO DIST. SYS. DURING NORMAL OPERATING CONDITIONS
	TWSs	1 SAMPLE ANNUALLY		NITRATE SAMPLE > MCL OR NITRITE SAMPLE > 50% OF MCL	1 SAMPLE QUARTERLY		---	---
INORGANICS RULES 62-550.500(5) & 62-550.513	CWSs, NTNCWSs	1 SAMPLE EVERY 3 YEARS	1 SAMPLE ANNUALLY	SAMPLE > MCL	1 SAMPLE QUARTERLY		4 FOUR CONSECUTIVE QUARTERS < MCL	SEE ROUTINE MONITORING		EVERY ENTRY POINT TO DIST. SYS. DURING NORMAL OPERATING CONDITIONS
CHLORINE & CHLORAMINES RULES 62-550.514(1) & 62-550.821	CWSs/NTNCWSs ADDING, OR DELIVERING WATER THAT HAS BEEN TREATED WITH, CHLORINE OR CHLORAMINES	MULTIPLE SAMPLES MONTHLY; SEE NOTE 2		---	---		---	---		NOTE 2
CHLORINE DIOXIDE RULES 62-550.514(1) & 62-550.821	CWSs/NTNCWSs / TWSs ADDING CHLORINE DIOXIDE	1 SAMPLE DAILY		SAMPLE > MCL	ADDITIONAL 3-SAMPLE SET THE FOLLOWING DAY		---	---		NOTE 3
TOTAL TRIHALOMETHANE S & HALOACETIC ACIDS (FIVE) STAGE 1 MCLs STAGE 1 MCLs RULES 62-550.514(2) & 62-550.821	CWSs/NTNCWSs ADDING A DISINFECTANT & SERVING > 10,000 PERSONS	1 SAMPLE PER TREATMENT PLANT QUARTERLY	4 SAMPLES PER TREATMENT PLANT QUARTERLY	---	---		GWS SYS. WITH ANNUAL AVG. TTHM & HAA5 ≤ 50% OF MCL; SUBPART H SYS. WITH ANNUAL AVG. SOURCE-WATER TOC ≤ 4.0 MG/L & ANNUAL AVG. TTHM & HAA5 ≤ 50% OF MCL	1 SAMPLE PER TREATMENT PLANT ANNUALLY DURING MONTH OF WARMEST WATER TEMP.	1 SAMPLE PER TREATMENT PLANT QUARTERLY	NOTE 4
	CWSs/NTNCWSs ADDING A DISINFECTANT & SERVING 500 to 9,999 PERSONS	1 SAMPLE PER TREATMENT PLANT ANNUALLY DURING MONTH OF WARMEST WATER TEMP.	1 SAMPLE PER TREATMENT PLANT QUARTERLY	GWS SYS. WITH AVG. OF ANNUAL SAMPLES > MCL	1 SAMPLE PER TREATMENT PLANT QUARTERLY	---	GWS SYS. WITH ANNUAL AVG. TTHM & HAA5 ≤ 50% OF MCL FOR 2 CONSECUTIVE YEARS OR ≤ 25% OF MCL FOR 1 YEAR; SUBPART H SYS. WITH ANNUAL AVG. SOURCE-WATER TOC ≤ 4.0 MG/L & ANNUAL AVG. TTHM & HAA5 ≤ 50% OF MCL	1 SAMPLE PER TREATME NT PLANT EVERY 3 YEARS DURING MONTH OF WARMEST WATER TEMP.	1 SAMPLE PER TREATMENT PLANT ANNUALLY DURING MONTH OF WARMEST WATER TEMP.
	CWSs/NTNCWSs ADDING A DISINFECTANT & SERVING < 500 PERSONS	1 SAMPLE PER TREATMENT PLANT ANNUALLY DURING MONTH OF WARMEST WATER TEMP.		AVG. OF ANNUAL SAMPLES > MCL	1 SAMPLE PER TREATMENT PLANT QUARTERLY		GWS SYS. WITH ANNUAL AVG. TTHM & HAA5 ≤ 50% OF MCL FOR 2 CONSECUTIVE YEARS OR ≤ 25% OF MCL FOR 1 YEAR		---
TOTAL TRIHALOMETHANES & HALOACETIC ACIDS (FIVE)  STAGE 2 MCLs RULES 62-550.514(2) & 62-550.822	CWSs/NTNCWSs USING A PRIMARY OR RESIDUAL DISINFECTANT OTHER THAN UV LIGHT OR DELIVERING WATER THAT HAS BEEN TREATED WITH A PRIMARY OR RESIDUAL DISINFECTANT OTHER THAN UV LIGHT	POPULATION BASED - REFER TO 40 CFR 141.621(a)(2)		MONITORING ANNUALLY OR LESS FREQUENTLY & TTHM SAMPLE > 0.080 MG/L, OR HAA5 SAMPLE > 0.060 MG/L, AT ANY LOCATION	DUAL SAMPLE SETS QUARTERLY AT ALL LOCATIONS		GWS WITH LRAA TTHM & HAA5 ≤ 50% OF MCL AT ALL MONITORING LOCATIONS; SUBPART H SYS. WITH ANNUAL AVG. SOURCE-WATER TOC ≤ 4.0 MG/L & LRAA TTHM & HAA5 ≤ 50% OF MCL AT ALL MONITORING LOCATIONS	POPULATION BASED - REFER TO 40 CFR 141.623(a)		HIGHEST TTHM LOCATIONS & HIGHEST HAA5 LOCATIONS IN ACCORDANCE WITH 40 CFR 141, SUBPART V, MONITORING PLAN
CHLORITE STAGE 1 MCL RULES 62-550.514(2) & 62-550.821	CWSs/NTNCWSs ADDING CHLORINE DIOXIDE	1 SAMPLE DAILY		SAMPLE > MCL	ADDITIONAL 3-SAMPLE SET THE FOLLOWING DAY		---	---		NOTE 5
		3-SAMPLE SET MONTHLY		---	---		NO INDIVIDUAL ENTRY-POINT OR DIST. SYS. SAMPLE > MCL FOR 1 YEAR	3-SAMPLE SET QUARTERLY
BROMATE STAGE 1 MCL RULES 62-550.514(2)(b) & 62-550.821	CWSs/NTNCWSs ADDING OZONE	1 SAMPLE PER TREATMENT PLANT MONTHLY		---	---		ANNUAL AVG. BROMATE < 0.0025 MG/L BASED ON MONTHLY MEASUREMENTS ANNUAL AVG. SOURCEWATER BROMIDE < 0.05 MG/L BASED UPON MONTHLY MEASUREMENTS	1 SAMPLE PER TREATMENT PLANT QUARTERLY		ENTRANCE TO DIST. SYS. UNDER NORMAL OPERATING CONDITIONS
VOLATILE ORGANICS RULES 62-550.500(5) & 62-550.515	CWSs, NTNCWSs	4 CONSECUTIVE QUARTERLY SAMPLES EVERY 3 YEARS OR, IF AUTHORIZED, 1 SAMPLE ANNUALLY; SEE NOTE 6		DETECTION OF ANY VOC AT > 0.0005 MG/L	1 SAMPLE QUARTERLY		GWS SYS. WITH NO DETECTION OF ANY VOC DURING 3 YEARS OF ANNUAL SAMPLING	1 SAMPLE EVERY 3 YEARS	---	NOTE 7
SYNTHETIC ORGANICS RULES 62-550.500(5) & 62-550.516	CWSs/NTNCWSs SERVING > 3,300 PERSONS	4 CONSECUTIVE QUARTERLY SAMPLES EVERY 3 YEARS		DETECTION OF ANY SOC	1 SAMPLE QUARTERLY		NO DETECTION OF ANY SOC DURING INITIAL COMPLIANCE PERIOD	2 QUARTERLY SAMPLES IN THE SAME YEAR EVERY 3 YEARS		NOTE 7
	CWSs/NTNCWSs SERVING ≤ 3,300 PERSONS							1 SAMPLE EVERY 3 YEARS
MICROBIOLOGICAL CONTAMINANTS RULE 62-550.518	CWSs, NTNCWSs, TWSs SERVING > 1,000 PERSONS	MULTIPLE SAMPLES MONTHLY; SEE NOTE 8		TOTAL COLIFORM POSITIVE SAMPLE	NOTE 9		---	---		SITES REFLECTING WATER THROUGHOUT DIST. SYS.
	TWSs SERVING ≤ 1,000 PERSONS	2 SAMPLES QUARTERLY	2 SAMPLES MONTHLY
SECONDARY CONTAMINANTS RULES 62-550.500(5) & 62-550.520	CWSs	1 SAMPLE EVERY 3 YEARS		---	---		---	---		EVERY ENTRY POINT TO DIST. SYS. DURING NORMAL OPERATING CONDITIONS
GROSS ALPHA, RADIUM-226, RADIUM-228, & URANIUM RULE 62-550.519(1)	CWSs	INITIAL MONITORING IS 4 CONSECUTIVE QUARTERLY SAMPLES; ROUTINE MONITORING IS 1 SAMPLE EVERY 3 YEARS; SEE NOTE 10		SAMPLE > MCL OR IF MONITORING ONCE EVERY 6 YEARS, A SAMPLE RESULT > 1/2 MCL OR IF MONITORING ONCE EVERY 9 YEARS, A SAMPLE RESULT ≥ DETECTION LIMIT	1 SAMPLE QUARTERLY WHEN PREVIOUS SAMPLE RESULT IS > MCL OR IF SAMPLING EVERY 9 YEARS AND THE SAMPLE IS ≤ MCL BUT > 1/2 MCL, SAMPLE EVERY 6 YEARS; OR IF SAMPLE IS > DETECTION LIMIT BUT 1/2  ≤  MCL OR IF SAMPLING EVERY 6 YEARS AND THE SAMPLE IS > 1/2 MCL BUT ≤ MCL, SAMPLE EVERY 3 YEARS		AVERAGE OF INITIAL MONITORING SAMPLES OR LAST REDUCED MONITORING SAMPLE < DETECTION LIMIT	1 SAMPLE EVERY 9 YEARS		EVERY ENTRY POINT TO DIST. SYS. DURING NORMAL OPERATING CONDITIONS
							DETECTION LIMIT ≤ AVERAGE OF INITIAL MONITORING SAMPLES OR LAST REDUCED MONITORING SAMPLE ≤ 1/2 MCL	1 SAMPLE EVERY 6 YEARS
BETA PARTICLE & PHOTON RADIOACTIVITY RULE 62-550.519(2)	CWSs DESIGNATED AS VULNERABLE	1 SAMPLE QUARTERLY FOR GROSS BETA & 1 SAMPLE ANNUALLY FOR TRITIUM & STRONTIUM-90		SAMPLE > MCL	1 SAMPLE MONTHLY FOR GROSS BETA, TRITIUM, & STRONTIUM-90		ANNUAL AVERAGE OF GROSS BETA MINUS POTASSIUM-40 ≤ 50 pCi\L	1 SAMPLE EVERY 3 YEARS FOR GROSS BETA, TRITIUM, & STRONTIUM-90		EVERY ENTRY POINT TO DIST. SYS. DURING NORMAL OPERATING CONDITIONS
	CWSs DESIGNATED AS UTILIZING WATERS CONTAMINATED BY EFFLUENTS FROM NUCLEAR FACILITIES	QUARTERLY FOR GROSS BETA & IODINE-131 & ANNUALLY FOR TRITIUM & STRONTIUM-90; SEE NOTE 11		QUARTERLY RESULT FOR GROSS BETA OR IODINE-131 > MCL; ANNUAL RESULT FOR TRITIUM OR STRONTIUM-90 > MCL	MONTHLY FOR GROSS BETA, IODINE-131, TRITIUM, & STRONTIUM-90		ANNUAL AVERAGE OF GROSS BETA MINUS POTASSIUM-40 ≤ 15 pCi/L	EVERY 3 YEARS FOR GROSS BETA, IODINE-131, TRITIUM, & STRONTIUM-90

 

Abbreviations used:

CWSs = community water systems;SOC = synthetic organic contaminant;

GWSs SYSTEMS = ground water systems;TOC = total organic carbon;

HAA5 = haloacetic acids (five);TTHM = total trihalomethanes;

MCL = maximum contaminant level;TWSs = transient non-community water systems;

UV = ultraviolet;

MG/L = milligrams per liter;VOC = volatile organic contaminant

NTNCWSs = non-transient non-community water systems;

pCi/L = picocuries per liter

 

NOTE 1: Systems susceptible to asbestos contamination due solely to corrosion of asbestos-cement pipe shall sample at a tap served by asbestos-cement pipe and under conditions where asbestos contamination is most likely to occur. Systems susceptible to asbestos contamination due solely to source water shall monitor at every entry point to the distribution system during normal operating conditions. Systems susceptible to asbestos contamination due to both source water and corrosion of asbestos-cement pipe shall sample at a tap served by asbestos-cement pipe and under conditions where asbestos contamination is most likely to occur.

NOTE 2: Systems shall measure the residual disinfectant level at the same locations in the distribution system where, and at the same time when, total coliforms are sampled.

NOTE 3: Systems shall take routine daily samples at the entrance to the distribution system. Systems shall take additional three-sample sets in the distribution system at the following locations:

(a) If 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 disinfectant addition disinfection points after the entrance to the distribution system (i.e., no booster chlorination), the system shall take three samples as close to the first customer as possible at intervals of at least six hours.

(b) If chlorine is used to maintain a disinfectant residual in the distribution system and there are one or more disinfectant addition points after the entrance to the distribution system (i.e., booster chlorination), the system shall take one sample at each of the following locations: as close to the first customer as possible, in a location representative of average residence time, and as close to the end of the distribution system as possible.

NOTE 4: Systems taking one sample shall take the sample at a location reflecting maximum residence time in the distribution system. Systems taking more than one sample shall take at least 25% of the samples at locations representing maximum residence time of the water in the distribution system and shall take the remaining samples at locations representing at least average residence time in the distribution system and representing the entire distribution system, taking into account number of persons served, different sources of water, and different treatment methods.

NOTE 5: Systems shall take routine daily samples at the entrance to the distribution system. Systems shall take routine monthly or additional three-set samples in the distribution system; each three-set sample shall consist of one sample at each of the following locations: a location as close to the first customer as possible, a location representative of average residence time, and a location reflecting maximum residence time in the distribution system.

NOTE 6: For initial base point monitoring, systems shall take four consecutive quarterly samples during the first three-year compliance period. If a system does not detect any VOC, it shall take one sample annually beginning with the next three-year compliance period.

NOTE 7: During the first quarter of initial base point monitoring, GWSs systems shall take a minimum of one sample that is representative of each well. Under all other circumstances, systems shall sample at every entry point to the distribution system during normal operating conditions.

NOTE 8: The minimum number of samples shall be as set forth in subsection 62-550.518(2), F.A.C.

NOTE 9: Systems shall conduct repeat monitoring in accordance with subsection 62-550.518(7), F.A.C., and systems that routinely collect fewer than five samples per month shall collect at least five samples during the next month the system provides water to the public.

NOTE 10: The Department shall waive the final two quarters of initial monitoring for a sampling point if the results of the samples from the previous two quarters are below the regulatory detection limit. Additionally, under the conditions described in paragraph 62-550.519(1)(c), F.A.C., historical data may be used to satisfy initial monitoring requirements. Systems shall take one sample quarterly if an MCL is exceeded.

NOTE 11: Quarterly monitoring for gross beta shall be based on the analysis of monthly samples or the analysis of a composite of three monthly samples. For iodine-131, a composite of five consecutive daily samples shall be analyzed once each quarter. Annual monitoring for tritium and strontium-90 shall be conducted by means of the analysis of a composite of four consecutive quarterly samples or analysis of four quarterly samples.

 

TABLE 8: INITIAL OR ROUTINE MONITORING SCHEDULE REFERENCE SUBSECTION 62-550.500(3): [insert the effective date of these rule amendments] Under initial or routine monitoring, public water systems shall take required samples during the time period specified below.
CONTAMINANT OR DISINFECTANT RESIDUAL GROUP		COMMUNITY WATER SYSTEMS SERVING MORE THAN 3,300 PEOPLE	COMMUNITY WATER SYSTEMS SERVING 3,300 OR FEWER PEOPLE	NON-TRANSIENT NON-COMMUNITY WATER SYSTEMS	TRANSIENT NON-COMMUNITY WATER SYSTEMS
ASBESTOS RULES 62-550.500(3) & 62-550.511		FIRST YEAR OF EACH NINE-YEAR COMPLIANCE CYCLE	SECOND YEAR OF EACH NINE-YEAR COMPLIANCE CYCLE	THIRD YEAR OF EACH NINE-YEAR COMPLIANCE CYCLE	NOT REQUIRED
NITRATES AND NITRITES RULES 62-550.500(3) & 62-550.512	GROUND WATER SYSTEMS	ANNUALLY
	SUBPART H SYSTEMS	QUARTERLY			ANNUALLY
INORGANICS RULES 62-550.500(3) & 62-550.513	GROUND WATER SYSTEMS	FIRST YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	SECOND YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	THIRD YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	NOT REQUIRED
	SUBPART H SYSTEMS	ANNUALLY			NOT REQUIRED
CHLORINE & CHLORAMINES RULES 62-550.514(1) & 62-550.821		MONTHLY FOR SYSTEMS ADDING, OR DELIVERING WATER TREATED WITH, CHLORINE OR CHLORAMINES			NOT REQUIRED
CHLORINE DIOXIDE RULES 62-550.514(1) & 62-550.821		DAILY FOR SYSTEMS ADDING CHLORINE DIOXIDE
TOTAL TRIHALOMETHANES & HALOACETIC ACIDS (FIVE) STAGE 1 MCLs STAGE 1 MCL RULES 62-550.500(3), 550.514(2), & 62-550.821	GROUND WATER SYSTEMS	QUARTERLY FOR SYSTEMS ADDING A DISINFECTANT & SERVING ≥ 10,000 PEOPLE & ANNUALLY DURING MONTH OF WARMEST WATER TEMPERATURE FOR SYSTEMS ADDING A DISINFECTANT & SERVING < 10,000 PEOPLE	ANNUALLY DURING MONTH OF WARMEST WATER TEMPERATURE FOR SYSTEMS ADDING A DISINFECTANT	QUARTERLY FOR SYSTEMS ADDING A DISINFECTANT & SERVING ≥ 10,000 PEOPLE & ANNUALLY DURING MONTH OF WARMEST WATER TEMPERATURE FOR SYSTEMS ADDING A DISINFECTANT & SERVING < 10,000 PEOPLE	NOT REQUIRED
	SUBPART H SYSTEMS	QUARTERLY FOR SYSTEMS ADDING A DISINFECTANT	QUARTERLY FOR SYSTEMS ADDING A DISINFECTANT & SERVING ≥ 500 PEOPLE & ANNUALLY DURING MONTH OF WARMEST WATER TEMPERATURE FOR SYSTEMS ADDING A DISINFECTANT & SERVING < 500 PEOPLE		NOT REQUIRED
TOTAL TRIHALOMETHANES & HALOACETIC ACIDS (FIVE) STAGE 2 MCLs RULES 62-550.500(3), 62-550.514(2), & 62-550.822	GROUND WATER SYSTEMS	QUARTERLY FOR SYSTEMS SERVING ≥ 10,000 PEOPLE; ANNUALLY DURING MONTH OF HIGHEST DBP CONCENTRATIONS FOR SYSTEMS SERVING < 10,000 PEOPLE	ANNUALLY DURING MONTH OF HIGHEST DBP CONCENTRATIONS	QUARTERLY FOR SYSTEMS SERVING ≥10,000 PEOPLE; ANNUALLY DURING MONTH OF HIGHEST DBP CONCENTRATIONS FOR SYSTEMS SERVING < 10,000 PEOPLE	NOT REQUIRED
	SUBPART H SYSTEMS	QUARTERLY	QUARTERLY FOR SYSTEMS SERVING ≥ 500 PEOPLE; ANNUALLY DURING MONTH OF HIGHEST DBP CONCENTRATIONS FOR SYSTEMS SERVING < 500 PEOPLE
CHLORITE STAGE 1 MCL RULES 62-550.514(2) & 62-550.821		DAILY AT ENTRANCE TO DISTRIBUTION SYSTEM & MONTHLY IN DISTRIBUTION SYSTEM FOR SYSTEMS ADDING CHLORINE DIOXIDE			NOT REQUIRED
BROMATE STAGE 1 MCL RULES 62-550.514(2) & 62-550.821		MONTHLY FOR SYSTEMS ADDING OZONE			NOT REQUIRED
VOLATILE ORGANICS RULES 62-550.500(3) & 62-550.515		QUARTERLY OR, IF AUTHORIZED, ANNUALLY DURING THE FIRST YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	QUARTERLY OR, IF AUTHORIZED, ANNUALLY DURING THE SECOND YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	QUARTERLY OR, IF AUTHORIZED, ANNUALLY DURING THE THIRD YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	NOT REQUIRED
SYNTHETIC ORGANICS RULES 62-550.500(3) & 62-550.516		QUARTERLY DURING THE FIRST YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD. UNLESS REDUCED MONITORING IS AUTHORIZED	QUARTERLY DURING THE SECOND YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD. UNLESS REDUCED MONITORING IS AUTHORIZED	QUARTERLY DURING THE THIRD YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD UNLESS REDUCED MONITORING IS AUTHORIZED	NOT REQUIRED
MICROBIOLOGICAL CONTAMINANTS RULES 62-550.500(3) & 62-550.518	GROUND WATER SYSTEMS	MONTHLY			MONTHLY FOR SYSTEMS SERVING > 1,000 PEOPLE & QUARTERLY FOR SYSTEMS SERVING ≤ 1,000 PEOPLE
	SUBPART H SYSTEMS	MONTHLY
GROSS ALPHA, RADIUM-226, RADIUM-228 & URANIUM RULES 62-550.500(3) & 62-550.519		ROUTINE MONITORING OCCURS DURING FIRST YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD UNLESS REDUCED MONITORING IS APPROVED	ROUTINE MONITORING OCCURS DURING SECOND YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD UNLESS REDUCED MONITORING IS APPROVED	NOT REQUIRED	NOT REQUIRED
BETA PARTICLE & PHOTON RADIOACTIVITY RULES 62-550.500(3) & 62-550.519		QUARTERLY/ANNUALLY FOR SYSTEMS DESIGNATED AS VULNERABLE OR UTILIZING WATERS CONTAMINATED BY EFFLUENTS FROM NUCLEAR FACILITIES		NOT REQUIRED	NOT REQUIRED
SECONDARY CONTAMINANTS RULES 62-550.500(3) & 62-550.520		FIRST YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	SECOND YEAR OF EACH THREE-YEAR COMPLIANCE PERIOD	NOT REQUIRED	NOT REQUIRED