; (D) where such information exists, the material composition of the service lines at such residential and nonresidential facilities; (E) the dates on which the respective sampling occurred; (F) the highest and median lead and copper levels detected; (G) the 90th percentile lead and copper levels (as such percentile is calculated under section 141.80 of title 40, Code of Federal Regulations, and any successor regulations) detected; (H) the number and value of all samples above the lead or copper action levels; (I) the disinfectants and corrosion inhibitors being used and the target doses at the water treatment plant; (J) any changes since the previous report under this section in the type, method, or quantity of treatments being used in the water sampled; (K) the history of violations, and fines received, by the system; (L) the number of samples invalidated and the reason for their invalidation; and (M) if sampling is conducted at residential facilities other than those with lead service lines, an explanation of why such sampling was conducted. (3) Public availability of reports A public water system shall make publicly available any report that is required by this section or by the lead and copper rule. (4) Privacy A public water system shall give the owner of each residential and nonresidential facility at which sampling data is collected the option to be identified only by block number and street name. (5) Sampling protocol; instructions The Administrator shall— (A) develop a protocol for sampling for compliance with the lead and copper rule; (B) in such protocol— (i) prohibit the use of techniques that minimize the detection of lead or copper in drinking water; (ii) require sampling under this section to occur not less than once per year; (iii) include criteria for site selection that prioritize testing at high-risk buildings; (iv) require sampling at all drinking water taps in all schools served by the public water system; and (v) require the sampling methodology to be scientifically based