New York Codes, Rules and Regulations › Title 10 - DEPARTMENT OF HEALTH › Chapter - APPENDICES › Appendix 5-C

Current through Register Vol. 46, No. 28, July 10, 2024
ACCEPTABLE METHODS FOR THE ANALYSIS OF CONTAMINANTS IN DRINKING
				WATER
Table of Contents
I. Approved methods for analysis of water samples to determine
				compliance with this Subpart
II. Sample compositing requirements
A. Inorganic chemical compositing requirements
B. Water sample compositing requirements for pesticides,
				dioxin, and PCBs
I. Approved methods for analysis of water samples to
				determine compliance with this Subpart
All samples shall be analyzed using approved methods as
				recognized by the United States Environmental Protection Agency (EPA) and/or
				the New York State Environmental Laboratory Approval Program (ELAP). A list of
				approved methods is available from ELAP on The Wadsworth Center's website at
				https://wadsworth.org/sites/default/files/WebDoc/I180_1_39_0.pdf or by request
				from the Records Access Officer, Department of Health, Corning Tower, Room
				2364, Albany, New York 12237-0044. Method references are cited in 40 CFR 141 at
				141.21(f), 141.24(e), 141.40(c), 141.131(a)(2), 141.704(a), 141.707(c) and
				141.852(c).
Test strips for free chlorine, Method D99-003, may be used for
				compliance monitoring only when approval of the State has been provided in
				writing. Method D99-003, Revision 3.0, "Free Chlorine Species (HOC1- and OC1-)
				by Test Strip," November 21, 2003, is available from Industrial Test Systems,
				Inc., 1875 Langston St., Rock Hill, SC 29730 or from the Records Access
				Officer, Department of Health, Corning Tower, Room 2364, Albany, New York
				12237-0044.
II. Sample compositing requirements
A. Inorganic chemical sample compositing
				requirements
The State may reduce the total number of samples which must be
				analyzed in accordance with Tables 8A-8D of section
				5-1.52 of this Subpart by allowing
				the use of compositing. Composite samples from a maximum of five samples are
				allowed, provided that the detection limit of the method used for analysis is
				less than one-fifth of the MCL. Compositing of samples shall be done in an ELAP
				certified laboratory.
If the concentration in the composite sample is greater than or
				equal to one-fifth of the MCL of any inorganic chemical, then a follow-up
				sample shall be taken within 14 days at each sampling point included in the
				composite. Each of the follow-up samples shall be analyzed for the
				contaminant(s) that exceeded one-fifth of the MCL in the composite
				sample.
B. Water sample compositing requirements for pesticides,
				dioxin, and PCBs
The State may reduce the total number of samples collected and
				analyzed in accordance with Table 9C of section
				5-1.52 of this Subpart by allowing
				the use of compositing. Composite samples from a maximum of five samples are
				allowed, provided that the detection limit of the method used for analysis is
				less than one-fifth of the MCL. Compositing of samples shall be done in an ELAP
				certified laboratory.
(a) If the concentration in the composite sample is greater
				than or equal to the detection limit of any organic chemicals listed in section
				5-1.52 Table 9C, then a separate
				follow-up sample shall be taken within 14 days at each sampling point included
				in the composite. Each of the follow-up samples shall be analyzed for the
				contaminant(s) which were detected in the composite sample.
(b) If duplicates or residual portions of the original sample
				taken from each sampling point used in the composites are available, the system
				may use such samples if additional sampling is necessary. Additional samples
				shall be analyzed and the results reported to the State within 14 days of
				collection.
(c) In systems serving fewer than 3,300 persons, the State may
				permit compositing among different systems provided the five-sample limit is
				maintained. In systems serving 3,300 or more persons, the State may permit
				compositing of samples from up to five sampling locations within the system,
				provided the reporting limit is maintained.