(a) No supplier of water shall make, install or construct, or allow to be made, installed or constructed, a public water system or any addition or deletion to or modification of a public water system until the plans and specifications have been submitted to and approved by the State. Materials used in the design, construction and repair of a public water system shall be lead-free. For this Subpart, lead-free shall mean:

1. (1) solder or flux which contains no more than 0.2 percent lead;

2. (2) pipes, pipe fittings, plumbing fittings and fixtures which contain no more than a weighted average of 0.25 percent lead with respect to the wetted surfaces.

   The weighted average lead content of a pipe, pipe fitting, plumbing fitting, or fixture shall be calculated by using the following formula: For each wetted component, the percentage of lead is multiplied by the ratio of the wetted surface area of that component to the total wetted surface area of the entire product to arrive at the weighted percentage of lead of the component. The weighted percentage of lead of each wetted component is added together, and the sum of these weighted percentages constitutes the weighted average lead content of the product. The lead content of the material used to produce wetted components is used to determine compliance with paragraph (2) of this subdivision. For lead content of materials that are provided as a range, the maximum content of the range must be used for calculating the weighted average lead content.

(b) Approval of plans and specifications for public water systems shall be based on the following standards in their entirety. The State may allow deviations from these standards in accordance with procedures established by the commissioner.

1. (1) Recommended Standards for Water Works, (Appendix 5-A).
2. (2) Standards for Water Wells (Appendix 5-B).
3. (3) Special Requirements for Wells Serving Public Water Systems (Appendix 5-D).