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Department of Natural Resources Division 60—Public Drinking Water Program Chapter 2—Definitions

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Department of Natural Resources Division 60—Public Drinking Water Program Chapter 2—Definitions Rules of Department of Natural Resources Division 60—Public Drinking Water Program Chapter 2—Definitions Title Page 10 CSR 60-2.010 Installation, Extension, Testing and Operation of Public Water Supplies (Rescinded October 11, 1979) ..................................................3 10 CSR 60-2.015 Definitions .......................................................................................3 10 CSR 60-2.020 Grants for Public Water Supply Districts, Sewer Districts, Rural Community Water Supply and Sewer Systems and Certain Municipal Sewer Systems (Moved to 10 CSR-13.010).................................7 Rebecca McDowell Cook (7/31/00) CODE OF STATE REGULATIONS 1 Secretary of State Chapter 2—Definitions 10 CSR 60-2 Title 10—DEPARTMENT OF liquids, gases or other substances into the ified operator classification of the certifica- NATURAL RESOURCES public water system from any source(s). tion program under the provisions of 10 CSR Division 60—Public Drinking 2. Backflow hazard. Any facility which, 60-14.020. Water Program because of the nature and extent of activities 2. Certificate of examination. A certifi- Chapter 2—Definitions on the premises or the materials used in con- cate issued to a person who passes a written nection with the activities or stored on the examination but does not meet the experience 10 CSR 60-2.010 Installation, Extension, premises, would present an actual or potential requirements for the classification of exami- Testing and Operation of Public Water health hazard to customers of the public water nation taken. Supplies system or would threaten to degrade the water 3. Chief operator. The person designat- (Rescinded October 11, 1979) quality of the public water system should ed by the owner of a public water system to backflow occur. have direct, on-site responsibility for the AUTHORITY: section 192.615, RSMo Supp. A. Class I backflow hazard. A back- operation of a water treatment plant or water 1973. Original rule filed Sept. 21, 1973, flow hazard which presents an actual or distribution system, or both. effective Oct. 1, 1973. Rescinded: Filed May potential health hazard to customers of the 4. Chloramines. All amino or imino 4, 1979, effective Oct. 11, 1979. public water system should backflow occur. groups in which the hydrogen has been A list of customer facilities, not all inclusive, replaced totally or in part by chlorine. considered to be Class I backflow hazards is 10 CSR 60-2.015 Definitions 5. Class I backflow hazard. See back- included in 10 CSR 60-11.010. flow hazard. B. Class II backflow hazard. A back- PURPOSE: This rule defines terms used in 10 6. Class II backflow hazard. See back- flow hazard which would threaten to degrade CSR 60. flow hazard. the water quality of the public water system 7. Coagulation. A process using coagu- (1) The terms used in 10 CSR 60 shall have should backflow occur. A list of customer lant chemicals and mixing by which colloidal the meanings as set forth in the Missouri Safe facilities, not all inclusive, considered to be and suspended materials are destabilized and Drinking Water Act, the federal Safe Class II backflow hazards is included in 10 agglomerated into flocs. Drinking Water Act and regulations, or this CSR 60-11.010. 8. Combined chlorine residual. That rule, unless the context of the term clearly 3. Backflow prevention assembly. An portion of the total chlorine residual which is assembly designed to prevent the reverse flow requires otherwise. not free available chlorine. of water or other substances from a customer 9. Community water system. A public facility back into the public water distribution (2) Definitions. water system which serves at least fifteen system. See also definitions of air-gap sepa- (A) Terms beginning with the letter A. (15) service connections and is operated on a ration, double check valve and reduced pres- 1. Action level. The concentration of year-round basis or regularly serves at least sure principle backflow prevention assembly. lead or copper in water which determines, in twenty-five (25) residents on a year-round 4. Backflow prevention assembly tester. some cases, the treatment requirements, sys- basis. A person who utilizes recognized backflow tem modifications, public education or other 10. Compliance cycle. The nine (9)-year prevention assembly testing procedures to requirements as specified by the department calendar year cycle during which public water that a water system is required to complete. determine whether or not an assembly is systems must monitor. Each compliance cycle 2. Air-gap separation. A backflow pre- functioning properly. Requirements for back- consists of three (3), three (3)-year compli- vention assembly consisting of a physical sep- flow prevention assembly tester certification ance periods. The first calendar year cycle aration between the free-flowing discharge are in 10 CSR 60-11. begins January 1, 1993 and ends December end of a public water system pipeline and an 5. Best available technology. The best 31, 2001; the second begins January 1, 2002 open or nonpressurized receiving vessel. An technology, treatment or other means which and ends December 31, 2010; and the third approved air-gap separation shall be at least the department finds, after examination for twice the diameter of the system pipe mea- efficacy under field conditions and not solely begins January 1, 2011 and ends December sured vertically above the overflow rim of the under laboratory conditions, are available 31, 2019. vessel. In no case shall the distance be less (taking cost into consideration). For the pur- 11. Compliance period. A three (3)-year than one inch (1"). pose of setting maximum contaminant levels calendar year period within a compliance 3. Alpha particle. A particle identical for synthetic organic chemicals, any best cycle. Each compliance cycle has three (3), with a helium nucleus, emitted from the available technology must be at least as effec- three (3)-year compliance periods. Within the nucleus of a radioactive element. tive as granular activated carbon. first compliance cycle, the first compliance 4. Applicant. The legal name of the 6. Beta particle. A particle, identical period runs from January 1, 1993 to water supply district, sewer district, rural with an electron, emitted from the nucleus of December 31, 1995; the second from January community, city, town or village for purposes a radioactive element. 1, 1996 to December 31, 1998; and the third of 10 CSR 60-13.010. 7. Breakpoint chlorination. The point at from January 1, 1999 to December 31, 2001. 5. Auxiliary intake. Any piping, connec- which sufficient chlorine has been applied to 12. Confluent growth. A continuous tion or device whereby water may be secured water to satisfy the chlorine demand which bacterial growth covering the entire filtration from a source other than the primary source. should result in a total chlorine residual of at area of a membrane filter, or a portion of the 6. Auxiliary water system. Any supply least seventy-five percent (75%) free avail- area, in which bacterial colonies are not dis- or source of water other than the approved able chlorine. crete. public water system. (C) Terms beginning with the letter C. 13. Consolidated formations. Earth (B) Terms beginning with the letter B. 1. Certificate. The certificate of compe- material which has been created by geologi- 1. Backflow. The undesirable reversal of tency issued by the department stating that a cal processes, cemented or compacted into a flow of water or mixtures of water and other person has met the requirements for the spec- coherent or firm mass. Rebecca McDowell Cook (7/31/00) CODE OF STATE REGULATIONS 3 Secretary of State 10 CSR 60-2—NATURAL RESOURCES Division 60—Public Drinking Water Program 14. Containment. Protection of the pub- 21. Customer service line. The pipeline to form a protective film on the interior walls lic water system by installation of a depart- from the public water system to the first tap, of a pipe. ment-approved backflow prevention assembly fixture, receptacle or other point of customer 2. Engineer. An individual registered as or air-gap separation at the user connection water use or to the first auxiliary water sys- a professional engineer in Missouri. from the main service line(s). tem or pipeline branch in a building. 3. Enhanced coagulation. The addition 15. Contaminant. Any physical, chemi- 22. Customer water system. All piping, of sufficient coagulant for improved removal cal, biological or radiological substances or fixtures and appurtenances, including auxil- of disinfection byproduct precursors by con- matter in water including, but not limited to, iary water systems, used by a customer to ventional filtration treatment. those substances for which maximum convey water on his/her premises. 4. Enhanced softening. The improved contaminant levels are established by the (D) Terms beginning with the letter D. removal of disinfection byproduct precursors department. 1. Department. The Missouri by precipitative softening. 16. Conventional filtration treatment. A Department of Natural Resources. (F) Terms beginning with the letter F. series of treatment processes including coag- 2. Department of Health. The Missouri 1. Facility. A single tract or contiguous ulation, flocculation, sedimentation and fil- Department of Health. tracts of land and any improvements on them, tration resulting in substantial particulate 3. Director. The director of the Missouri upon which one (1) or more service connec- removal. Department of Natural Resources. tions are located, and which, except for ease- A. Required treatment for groundwa- 4. Disinfectant. Includes, but is not lim- ments and public right-of-way, are wholly ter systems under the direct influence of sur- ited to, chlorine, chlorine dioxide, chlo- owned, leased or otherwise subject to the face water. One (1) stage of treatment must be ramines and ozone added to water in any part control of the customer. provided as follows: rapid mix, flocculation of the treatment or distribution process, that 2.
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