R 325.10103 Definitions; C.

Rule 103. As used in these rules:

(a) "C" in "CT calculation" means the residual disinfectant concentration measured in milligrams per liter in a representative sample of water.

(b) "Casing" means a durable pipe that is placed in a well to prevent the soil from caving in and to seal off surface drainage or undesirable water, gases, contaminants, or other fluids and prevent them from entering the well and the aquifer supplying the well.

(c) "Casing vent" means an outlet at the upper terminal of a well casing which provides atmospheric pressure in the well and which allows the escape of gases when present.

(d) "Certificate" means a document that is issued by the department to a person who meets the qualification requirements for operating a waterworks system or a portion of the waterworks system.

(e) "Certified operator" means an operator who holds a certificate.

(f) "Community supply" or "community water supply" or "community water system" means a public water supply that provides year-round service to not fewer than 15 living units or that regularly provides year-round service to not fewer than 25 residents.

(g) "Complete treatment" means a series of processes, including disinfection and filtration, to treat surface water or ground water under the direct influence of surface water, or to treat ground water not under the direct influence of surface water that uses precipitative softening, to produce a finished water meeting state drinking water standards.

(h) "Compliance cycle" means the 9-year calendar year cycle during which public water systems are required to monitor.  Each compliance cycle consists of three 3-year compliance periods.  The first calendar year cycle begins January 1, 1993, and ends December 31, 2001; the second begins January 1, 2002, and ends December 31, 2010; the third begins January 1, 2011, and ends December 31, 2019.

(i) "Compliance period" means a 3-year calendar year period within a compliance cycle.  Each compliance cycle has three 3-year compliance periods.  Within the first compliance cycle, the first compliance period runs from January 1, 1993, to December 31, 1995; the second from January 1, 1996, to December 31, 1998; the third from January 1, 1999, to December 31, 2001.

(j) "Comprehensive performance evaluation (CPE)" means a thorough review and analysis of a treatment plant's performance-based capabilities and associated administrative, operation, and maintenance practices.  It is conducted to identify factors that may be adversely impacting a plant's capability to achieve compliance and emphasizes approaches that can be implemented without significant capital improvements.  For purposes of compliance, the comprehensive performance evaluation shall consist of at least all of the following components:

(i) Assessment of plant performance.

(ii) Evaluation of major unit processes.

(iii) Identification and prioritization of performance limiting factors.

(iv) Assessment of the applicability of comprehensive technical assistance.

(v) Preparation of a CPE report.

(k) "Confluent growth" means a continuous bacterial growth that covers the entire filtration area of a membrane filter, or portion of a filtration area, in which bacterial colonies are not discrete.

(l) "Construction" means the erection, installation, or alteration of a waterworks system, or any portion of a waterworks system, that affects any of the following:

(i) Flow.

(ii) Capacity.

(iii) System service area.

(iv) Source.

(v) Treatment.

(vi) Reliability.

(m) "Contested cases" means matters that are within the definition of a contested case as set forth by section 3(3) of 1969 PA 306, MCL 24.203(3), and matters of issue that involve any of the following which are issued by the director, the department, or the division pursuant to the act and these rules:

(i) Orders.

(ii) Exemptions.

(iii) Variances.

(iv) Stipulations.

(v) Consent agreements.

(vi) Permits.

(vii) Licenses.

(viii) Certificates.

(n) "Contested case hearing" means a hearing that is initiated by the department or a person under chapters 4, 5, and 6 of 1969 PA 306, MCL 24.271 to 24.306.

(o) "Contaminant" means a physical, chemical, biological, or radiological substance or matter in water.

(p) "Contingency plan" means a plan for use by a supplier of water in the event of an emergency.

(q) "Conventional filtration" means a series of processes, including coagulation, flocculation, sedimentation, and filtration, resulting in substantial particulate removal.

(r) "Corrosion inhibitor" means a substance that is capable of reducing the corrosivity of water toward metal plumbing materials, especially lead and copper, by forming a protective film on the interior surface of those materials.

(s) "Cross connection" means a connection or arrangement of piping or appurtenances through which a backflow could occur.

(t) "CT calculation" means the product of residual disinfectant concentration (C) in milligrams per liter determined at or before the first customer and the corresponding disinfectant contact time (T) in minutes; C*T is calculated at rated capacity.  The total CT shall be the sum of individual CTs of each disinfectant sequence.

(u) "Customer service connection" means the pipe between a water main and customer site piping or building plumbing system.

(v) "Customer site piping" means an underground piping system owned or controlled by the customer that conveys water from the customer service connection to building plumbing systems and other points of use on lands owned or controlled by the customer.  Customer site piping does not include any system that incorporates treatment to protect public health.

History:   1954 ACS 94, Eff. Jan. 12, 1978; 1979 AC; 1991 MR 11, Eff. Nov. 22, 1991; 1993 MR 6, Eff. July 2, 1993; 1994 MR 12, Eff. Jan. 5, 1995; 2000 MR 19 Eff. Dec. 8, 2000; 2002 MR 10, Eff. May 30, 2002; 2003 MR 2, Jan. 29, 2003.