I'm looking for a citation on when the requirements to use lead-free solder in residential plumbing took effect.
Why? On 06/09/2009 a local plumbing company re-plumbed the house I live in. Today we had lead testing done and found:
- Pipes: trace amount of lead
- Brass Fittings: 6.25%
- Solder: .7%
The fitting at 6.25% was legal at the time. The pipes are fine. But that solder number seems quite high for 2009 in California.
A fine fact sheet is at http://www.dtsc.ca.gov/PollutionPrevention/upload/lead-in-plumbing-fact-sheet.pdf but it does not give the history.