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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>INPUT INTO AND FATE OF LEAD IN A SMALL RESERVOIR</title>
      <link>https://trid.trb.org/View/168999</link>
      <description><![CDATA[Lead (Pb) concentrations in water samples collected from seven sites in Weston's Mill Pond, NJ, a water supply/recreaction reservoir exposed to substantial amounts of highway runoff, under varying meteorological conditions ranged from 18.3 to 34.9 ug/l. Highest average concentration over all sites (46.4 ug Pb/l) occurred after a period of heavy rainfall. The non-filterable fraction accounted for 80 to 96 percent of the total lead present in the water. Estimated loading of lead to the reservoir via a major tributary during a storm event was 3.22 pounds, with levels in the tributary reaching a maximum of 1.94 mg Pb/l during the storm.]]></description>
      <pubDate>Fri, 12 Jun 1981 00:00:00 GMT</pubDate>
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      <title>WATER QUALITY DEGRADATION DUE TO NON-POINT POLLUTION FROM URBAN SOURCES</title>
      <link>https://trid.trb.org/View/162708</link>
      <description><![CDATA[A study of the concentrations of cadmium and lead in the Christiana River in the Newark, Delaware, area showed that lead pollution originates from airborne automotive exhausts, while cadmium pollution originates from surface stormwater runoff. Four complete storm events were sampled for streamwater degradation analysis at five different sampling stations. Stream sediments and soils suspended during a storm event have significant adsorption capacity. Hydraulic dispersion and stochastic models are used to describe stream responses to storm events.]]></description>
      <pubDate>Wed, 15 Apr 1981 00:00:00 GMT</pubDate>
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      <title>COMPARATIVE STUDY OF PROCEDURES FOR THE ANALYSIS OF CHLORIDE IN HARDENED CONCRETE</title>
      <link>https://trid.trb.org/View/57977</link>
      <description><![CDATA[In the widely used potentiometric titration procedure for the analysis of chloride in powdered hardened concrete samples, difficulties have often been encountered when determining the endpoint. These difficulties have been eliminated through the use of the Gran method of endpoint determination, which also simplifies the titration and improves the overall precision of the method. Using test specimens, the accuracy of this improved potentiometric titration procedure was evaluated by comparison with the atomic absorption and neutron activation procedures developed for the same analysis. The comparison indicated that the improved titration procedure is the simplest and most economical of the three and possibly is the most accurate.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
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      <title>TAR BALL DISTRIBUTION IN THE WESTERN NORTH ATLANTIC</title>
      <link>https://trid.trb.org/View/23636</link>
      <description><![CDATA[Surface waters of the Atlantic Ocean were quantitatively sampled for floating tar balls from December 1971 to September 1973. It was found that tar ball concentrations (mg/sq m) generally increase from the Labrador Sea at ocean station Bravo (nearly tar ball free) south to the Sargasso Sea at ocean station Echo (greater than 2.6 mg/sq m). This south to north decrease in tar pollution was not only noted for the four ocean station sampling areas, but was also observed along the eastern coast of the United States. Analysis of thirty-five tar ball samples for iron (determined as Fe2O3) indicated high levels of Fe2O3. This implies previous association of the tar balls with iron or steel and suggests that man-made sources are partially responsible for tar ball pollution in addition to natural oil seeps.]]></description>
      <pubDate>Thu, 29 May 1975 00:00:00 GMT</pubDate>
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