Compilation of Rules and Regulations of the State of Georgia › Department 391 - RULES OF GEORGIA DEPARTMENT OF NATURAL RESOURCES › Chapter 391-3 - ENVIRONMENTAL PROTECTION › Subject 391-3-5 - RULES FOR SAFE DRINKING WATER › Rule 391-3-5-.21 - Inorganic Chemical Sampling and Analytical Requirements

Current
				through Rules and Regulations filed through June 27, 2024
(1)
CWS and NTNCWS Monitoring
.
				Community and non-transient, non-community water systems shall conduct
				monitoring to determine compliance with the maximum contaminant levels
				specified in Rule
				391-3-5-.18 in accordance with this
				rule.
(2)
TNCWS
				Monitoring
. Transient, non-community water systems shall conduct
				monitoring to determine compliance with the nitrate and nitrite maximum
				contaminant levels in Rule
				391-3-5-.18 in accordance with this
				rule.
(3)
Nitrate Monitoring
				for NCWS with Alternate Limit.
The frequency of monitoring conducted to
				determine compliance with the maximum contaminant level for Nitrate as
				specified in Rule
				391-3-5-.18(1)(b)
				shall be conducted as follows:
(a) Analyses
				for all non community water systems (NTNCWS and TNCWS) utilizing surface water
				sources shall be repeated at yearly intervals. Analyses for all non community
				water systems (NTNCWS and TNCWS) utilizing only ground water sources shall be
				repeated at three-year intervals.
(b) For any non community water system
				(NTNCWS and TNCWS) that the Director has granted an alternate nitrate MCL of 20
				mg/l pursuant to Rule
				391-3-5-.18(1)(b)
				the monitoring frequency shall be conducted at intervals determined by the
				Director.
(c) If the result of an
				analysis made pursuant to paragraph (3) of this Rule indicates that the level
				of Nitrate listed in Rule
				391-3-5-.18(1)(b)
				exceeds the maximum contaminant level, the supplier of water shall report to
				the Division in writing within seven (7) days and initiate three additional
				analyses at the same sampling point within fourteen (14) days.
(d) When the average of four analyses made
				pursuant to paragraph (3)(c), rounded to the same number of significant figures
				as the maximum contaminant level for the substance in question, exceeds the
				maximum contaminant level, the supplier of water shall notify the Division
				pursuant to Rule
				391-3-5-.30 and give notice to the
				public pursuant to Rule
				391-3-5-.32. Monitoring after public
				notification shall be at a frequency designated by the Division and shall
				continue until the maximum contaminant level has not been exceeded in two
				successive samples or until a monitoring schedule as a condition to a permit,
				variance, exception or enforcement action shall become effective.
(e) If the four analyses are not made
				pursuant to paragraph (3)(c), the Division will use the analyses available to
				prepare compliance calculations pursuant to paragraph (3)(d).
(f) The Division has the authority to
				determine compliance or initiate enforcement action based upon analytical
				results and other information compiled by their sanctioned representatives or
				agencies.
(g) The provisions of
				paragraphs (3)(c) and (3)(d) not withstanding, compliance with maximum
				contaminant for nitrate shall be determined based on the mean of the two
				analyses. When a level exceeding the maximum contaminant level for nitrate is
				found, a second analysis shall be initiated within 24 hours and if the mean of
				the two analyses exceeds the maximum contamination level, the supplier of water
				shall report the findings to the Director pursuant to Rule
				391-3-5-.30 and shall notify the
				public pursuant to Rule
				391-3-5-.32.