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Privacy and Security Notice
Privacy and Security Notice
About Privacy and Security
This World Wide Web (WWW) site is provided as a public
service by the Environmental Protection Agency.
Information presented on this WWW site is considered public
information and may be distributed or copied. The U.S.
Government retains a nonexclusive, royalty-free license
to publish or reproduce these documents, or allow others
to do so, for U.S. Government purposes. These documents
may be freely distributed and used for non-commercial,
scientific and educational purposes. Commercial use of
the documents available from this server may be protected
under the U.S. and Foreign Copyright Laws. Individual
documents on this server may have different copyright
conditions, and that will be noted in those documents.
When you come to this web site to browse, you do so anonymously.
EPA does not collect identifying information about you.
We collect only summary information [see
below] about the numbers of individuals who visit
our web site and what those individuals look at. This
government computer system uses industry-standard software
to create summary statistics, which are used for such
things as assessing what information is of most and least
interest, determining technical design specifications,
and identifying system performance or problem areas.
Where identifying information is asked of you (to respond
to an information request, etc.) that information is used
only for responding to your comment or question and is
not made available for other purposes. See our comments
notice of use.
For site security purposes and to ensure that this service
remains available to all users, this government computer
system employs industry-standard methods to monitor network
traffic to identify unauthorized attempts to upload or
change information, or otherwise cause damage.
No other attempts are made to identify individual users
or their usage habits. Raw data logs are used for no other
purposes and are scheduled for regular destruction in
accordance with National Archives and Records Administration
Unauthorized attempts to upload information or change
information on this service are strictly prohibited and
may be punishable under the Computer Fraud and Abuse Act
If you have any questions or comments about the information
presented here, please forward them to us through the
address on our Comments
Example of the Information Collected for
Below is an example of the information collected based on a standard
request for a World Wide Web document:
xxx.yyy.com - - [28/Jan/1997:00:00:01 -0500]
"GET /sitename/news/nr012797.html HTTP/1.0" 200 16704
xxx.yyy.com (or 22.214.171.124) -- this is the host
name (or IP address) associated with the requester (you as
the visitor). In this case, (....com) the requester is coming
from a commercial address. Depending on the requestor's method
of network connection, the host name (or IP address) may or
may not identify a specific computer. Connections via many
Internet Service Providers assign different IP addresses for
each session, so the host name identifies only the ISP. The
host name (or IP address) will identify a specific computer
if that computer has a fixed IP address.
[28/Jan/1997:00:00:01 -0500] -- this is the date and
time of the request
"GET /sitename/news/nr012797.html HTTP/1.0" -- this
is the location of the requested file
200 -- this is the status code - 200 is OK - the request
16704 -- this is the size of the requested file in
Mozilla 3.0 -- this identifies the type of browser
software used to access the page, which indicates what design
parameters to use in constructing the pages
www.websitename.com -- this indicates the last site
the person visited, which indicates how people find this site
Requests for other types of documents use similar information.
No other user-identifying information is collected.