Main Title |
Seattle Distribution System Corrosion Control Study. Volume 4. On-Site Evaluation of Corrosion Treatment. |
Author |
Herrera, Carlos E. ;
Nakhjiri, Karen S. ;
Hoyt, Brian P. ;
|
CORP Author |
Seattle Dept. of Water, WA. Water Quality Div.;Municipal Environmental Research Lab, Cincinnati, OH. |
Year Published |
1983 |
Report Number |
EPA-R-806686; EPA-600/2-83-056; |
Stock Number |
PB83-241729 |
Additional Subjects |
Corrosion prevention ;
Distribution systems ;
Plumbing ;
Water treatment ;
Calcium oxides ;
Sodium carbonates ;
Water pipes ;
Leaching ;
Protection ;
Iron ;
Copper ;
Lead(Metal) ;
Comparison ;
Bacteria ;
pH ;
Effectiveness ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB83-241729 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
80p |
Abstract |
For 8 months, the Seattle Water Department conducted a corrosion treatment pilot plant study, obtaining data on the treatment of Tolt River water with lime and sodium carbonate. Pipe loop tests were conducted to determine the appropriate chemical start-up procedures for two full-scale corrosion treatment facilities; to document the effectiveness of the corrosion treatment program in suppressing corrosion, metal leaching and tuberculation in older galvanized steel premise plumbing systems; to document the bacterial effects of the corrosion treatment program on water quality; and to anticipate any possible customer problems caused by implementation of the corrosion treatment program. The study monitored the effects of simulated corrosion treatment start-up on chemical and microbial water quality from an old galvanized plumbing system. Standing water samples collected after treatment start-up displayed increased iron deposits, organic debris and bacterial populations compared to untreated standing water samples. Zinc leaching was reduced during treatment from pH 6 to pH 7 and increased from pH 7 to pH 8. Iron leaching was found to increase by approximately 38% during treatment start-up, while copper and lead leaching were reduced by 53% and 57%, respectively. Corrosion treatment also resulted in a reduction of approximately 32% in the tuberculation rate. |
Supplementary Notes |
See also Volume 1, PB82-231820. |
PUB Date Free Form |
Aug 83 |
Category Codes |
13B; 50B; 71G; 43F |
NTIS Prices |
PC A05/MF A01 |
Primary Description |
600/14 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
331551556 |
Origin |
NTIS |
Type |
CAT |