Full Description

Lead measured at the consumer's tap is primarily the result of corrosion of lead containingmaterials used in drinking water transmission, distribution, and premise piping systems.Reductions in lead levels measured at the tap have been achieved through a combination ofapplication of corrosion treatment techniques to reduce the corrosivity of their water to leadsource material and through reductions in lead sources in the system via lead service linereplacement and requirements to use "lead-free" materials (defined as not more than 8% lead forpipes and pipe fittings). A field data collection study was conducted to determine lead levelsfrom sequential samples collected at single-family residential sites before and after the existingkitchen faucet was replaced with a non-leaded faucet (i.e. a faucet made using brass containing 0.2% lead by weight). Lead levels measured in the first 125 mL samples collected a the tapafter faucet replacement were higher than lead levels measured in the first 125 mL samplescollected before faucet replacement. At two sites, replacement of the existing faucet with a non-leadedfaucet had no impact on calculated 1 liter standing lead levels evaluated 1, 2, 3, and 4weeks after replacement. At a third site, the calculated 1 liter standing lead level was higher oneweek after faucet replacement. Includes 9 references, tables, figures.

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Edition: Vol. - No. Published: 03/01/2007 Number of Pages: 12File Size: 1 file , 280 KB