Browse
Search
Agenda - 05-01-2001-10a
OrangeCountyNC
>
Board of County Commissioners
>
BOCC Agendas
>
2000's
>
2001
>
Agenda - 05-01-2001
>
Agenda - 05-01-2001-10a
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
9/2/2008 12:23:32 AM
Creation date
8/29/2008 10:31:14 AM
Metadata
Fields
Template:
BOCC
Date
5/1/2001
Document Type
Agenda
Agenda Item
10a
Document Relationships
Minutes - 05-01-2001
(Linked To)
Path:
\Board of County Commissioners\Minutes - Approved\2000's\2001
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
33
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
1 <br />been established by the EPA. The incidence of lead is usually tied to corrosion of <br />solder joints in metal household pipes and alloys in pumps and faucets. Elevated <br />lead exposure is known to cause delayed physical and mental development in <br />babies and young children and also has been linked to kidney disease. <br />F. Organic Compounds <br />The ground water samples collected in the County were also examined for <br />certain organic compounds that may indicate the presence of herbicides or <br />petroleum products. Specifically, the water testing checked for atrazine-type <br />compounds and total petroleum-hydrocarbon compounds, including BTEX ( a <br />common measurement of benzine, toluene, ethylene and xylene). Atrazine is a <br />frequently used herbicide. <br />None of the compounds were detected in the samples, and this result in the <br />geographically and statistically sampled wells may indicate that contamination by <br />organic compounds is not a widespread problem in the County. Further work <br />would be needed to more comprehensively determine this, however. <br />G. Radon <br />Water-borne radon is anaturally-occurring substance from the decay of uranium <br />bearing rocks. It is the dissolved state of radon (or radium-222) that poses <br />potential health risks. As ground water is exposed to air through showers and <br />running faucets, radon present in the water may diffuse into the air. Thus, there <br />are two potential means of exposure to radon -ingestion and inhaling. Because <br />radon exposure can occur in two ways, EPA has had difficulty addressing <br />regulations, eventually deciding on a "multi-media" approach. If no State or EPA- <br />approved mitigation program exists, the MCL for radon is 300 picoCuries per liter <br />(pCi/L). If there is an approved mitigation program, then 4000 pCi/L is proposed. <br />Results from the wells sampled in this study used these standards for <br />comparison. <br />The results of this sampling are the most significant of all the water quality <br />findings, as some limited incidence of high radon readings were found in the <br />County. These high readings are not completely unexpected. In 1998, findings of <br />high radon levels in nearby Guilford County (in similar geologic formations) led to <br />some expectation by the Committee that higher than average radon findings <br />would also be observed in Orange. <br />The range of radon activity in Orange was quite dramatic, from a low of 38 pCi/L <br />(picocuries per liter) to 4462 pCi/L (please see Map 2) .The median finding of all <br />samples was 405 pCi/L, above the 300 pCi/L standard suggested by EPA. <br />Generally, the radon activity was highest in felsic (silica and feldspar) rocks and <br />lowest in mafic rocks (iron and manganese base). <br /> <br />
The URL can be used to link to this page
Your browser does not support the video tag.