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z� r rN SECURITY TITLE 22 (Register 78, No. 3-1-21-78) — (c) In existing community water systems, if any maximum contami- nant level in Table 6 is exceeded, the water supplier, pursuant to Sec- tion 4023, Health and Safety Code, may be required, following an investigation by the Department, to conduct a study. (1) The investigation by the Department shall determine the ex- tent of: (A) Noncompliance with the maximum contaminant levels. (B) Consumer dissatisfaction which is based upon the secondary drinking water standards. (2) The study conducted by the water supplier shall: (A) Be conducted in a manner and in accordance with a sched- ule acceptable to the Department and be completed in a period of time not to exceed one year. (B) Be made by persons acceptable to the Department. (C) Determine the degree of consumer acceptance of the water supply. (D) Investigate the causes, methods of correction and estimate the cost of one or more alternative solutions. (3) The results of the study conducted by the water supplier shall be made available to the: (A) Users at an appropriately noticed public meeting. (B) Department. (C) Public Utilities Commission, if appropriate. (d) The requirements of (b) (1) (B) and (b) (2) may be waived by the Department following the completion of an investigation as re- quired in (c) based upon, but not necessarily limited to: (1) Consumer acceptance of water not meeting the maximum contaminant levels shfwn in Table 6. (2) Economic considerations. (e) For the constituents shown on Table 7, no fixed consumer ac- ceptance contaminant level has been established. (1) Constituent concentrations lower than the Recommended contaminant level are desirable for a higher degree of consumer acceptance. y (2) Constituent concentrations ranging to the Upper contaminant a ,,,1 evel are acceptable if it is neither reasonable nor feasible to provide `more suitable waters. (3) Constituent concentrations ranging to the Short Term con- minant level are acceptable only for existing systems on a tempo- rary basis pending construction of treatment facilities or CS" development of ac a w water sources. s (f) New services from systems serving water which carries constitu- ent concentrations between the Upper and Short Term contaminant levels shall be approved only: iox (1) If adequate progress is being demonstrated toward providing �p G water of improved mineral quality. (2) For other compelling reasons approved by the Department. /fislor? • 1. Amendment of Table 6 in subsection (a) filed as an editorial correction 1.18-78: effective thirtieth day thereafter (Register 78, No. 3).