The objectives of this study were to examine the short-term and
long-term impact of partial lead service branch (LSB) changeover on lead concentrations measured at the consumers'
taps. The impacts from partial LSB changeover were also compared with the results from
performing complete changeovers as well as from performing no service branch work at all.
The approach used to accomplish these objectives was to perform lead analyses at twenty-one
homes with lead service branches. These sites were divided into four groups. For five of these
sites, the Greater Cincinnati Water Works (GCWW) replaced the entire service branch from the
water main up to the house. For another 5 sites, GCWW performed partial replacement of the
service branch from the water main to the property line leaving the original lead branch in tact
from the property line into the house. At 6 sites, GCWW performed partial replacements, but
covered the freshly cut end with a Teflon shrink wrap tubing. The final five sites acted as
control sites with no work performed on the lead service branch. All sites were sampled initially
one week after work was performed (except the control sites), and at one month intervals for a
year. Sampling at all sites consisted of a first draw after standing a minimum of six hours, after a
three minute flush, and after a ten minute flush. The paper goes on to discuss topics that include: description of sampling sites; description of line replacement; sample collection and analysis; water quality; results of initial spike; and, steady state lead concentration. Includes 10 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 290 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 06/01/2006 |
