AWWA C654 2021

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AWWA C654-21 Disinfection of Wells

Published By	Publication Date	Number of Pages
AWWA	2021	28

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Description

This standard describes the procedures for disinfection and bacteriological testing of wells for potable water service following construction, servicing, maintenance, or any other activity or event that might lead to contamination of the water. The chlorination procedures provided in this standard are for the gravel pack, well casing, pump, and appurtenant piping and are presented in the sequence in which they generally would be implemented.

PDF Catalog

PDF Pages	PDF Title
7	Foreword I. Introduction. I.A. Background. During construction of a well, the bore hole may become contaminated by surface-water inflow and undesirable fluids in formations through which the bore hole may penetrate. In addition, contamination may be introduced in a well by the dri I.B. History. This is the fourth edition of AWWA C654, Standard for Disinfection of Wells. The first edition was approved by the AWWA Board of Directors on Jan. 25, 1987. Subsequent editions were approved on June 15, 1997, Jan. 19, 2003, and Jan. 20, 2013 I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct
9	II. Special Issues. Disinfection of wells requires high levels of disinfectant to be applied to ensure bacteria and other potential pathogens are inactivated. Temperature and pH are two important factors affecting the disinfection process. Above a pH of 9 III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A. Purchaser Options and Alternatives. The following information should be provided by the purchaser: III.B. Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser.
10	IV. Major Revisions. Major changes made to the standard in this revision include the following: V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering & Technical Services at 303.794.7711, FAX at 303.795.7603, write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098, or email at standard
11	AWWA Standard SECTION 1: GENERAL Sec. 1.1 Scope Sec. 1.2 Purpose Sec. 1.3 Application
12	SECTION 2: REFERENCES SECTION 3: DEFINITIONS
13	SECTION 4: REQUIREMENTS Sec. 4.1 Preventive Actions
14	Sec. 4.2 Forms of Chlorine for Disinfection
16	Sec. 4.4 Chlorination of Permanent Equipment and Material Used in Wells Sec. 4.5 Chlorination of Well After Permanent Equipment Is Installed
17	Sec. 4.6 Disposal of Contaminants SECTION 5: VERIFICATION Sec. 5.1 Bacteriological Testing
18	Sec. 5.2 Disinfection of Flowing Wells Sec. 5.3 Record of Compliance Sec 5.4 Optional Sampling and Testing
19	SECTION 6: DELIVERY
21	APPENDIX A Chemical Requirements for 100-mg/L Chlorine Solution Table A.1 Chlorine compound required to dose 100 ft of water-filled well at 100 mg/L