This topic contains a number of "standard reports", types of searches
that are often done on TRI data.
The searches include:
If you have any questions, comments, or found any bugs in these reports
please either send RTK NET mail to helpdesk@rtknet.org
or call us at 202-234-8494. We may also by able to assist you
with more complex reports as long as you give us at least one week of lead
time.
Database Type Field
This field selects whether you will use the Frozen or Current versions
of the database. They are described below.
In previous years, EPA would "freeze" the database at a particular date – in other words, they would not enter revisions into the database for a short period, during which the data would not change. EPA used to use this "frozen" database to make the tables used in the Public Data Release documents; they would also send the frozen database out to RTK NET, NLM, and other TRI data providers. In this way, all of the different providers of TRI data would produce numbers that matched each other.
For its Envirofacts project, EPA started to no longer use a frozen database, and to update the TRI data available through Envirofacts with revisions. This was good for data reporters, because it meant that corrections of their previous errors would be available before the release of next year’s frozen database. It could be considered to be good for data users for this same reason. However, it meant that TRI numbers from Envirofacts would no longer match numbers obtained from other sources.
This year, the situation is somewhat more complicated. EPA has effectively released three different versions of the data:
1. The set that it used to make the Press Release documents. This is the same set that is provided through EPA’s new TRI Explorer Web access program. It includes revisions made through March 31, 2000.
2. The set used to make the upcoming Public Data Release documents. This is almost exactly the same as the first set, except that one record has been deleted. This set is the "frozen" set. The single record that was deleted was document control number 1398125285890, TRI Facility Id 91752MTLCN10980, and reported 1633 lbs of air releases, 1 lb of water releases, 1,187,989 lbs of transfers, and 1,162,692 lbs of waste Lead in California.
3. The "current" database with the latest revisions, as represented by EPA’s version of the TRI data on Envirofacts.
In order to provide maximum flexibility for data users, RTK NET will now permit users to search either the Frozen or Current version of the database. You should use the Frozen version if you wish your results to match the Public Data Release and other EPA documents, or if you wish to ensure that you will get the same results if you do a search as you got from the same search done a month ago. You should use the Current version if you wish your results to include revisions made since March 31, 2000.
In order to match the Public Data Release, the Frozen version of the database does not include records for chemicals that have been deleted from the TRI list. The Current version of the database does include such records. So if you wish your search to include chemicals, reported in previous years, that were later deleted from TRI, you should use the Current version of the database.
Treatment Type
Off-site shipments of waste are coded by the shipper to indicate what
kind of recycling, treatment, or disposal is going on at the destination.
You can limit your search by one of these codes in order to, for instance,
find only shipments of waste to incinerators.
These codes are unreliable, however. Many of the shippers of the waste
appear to have a poor idea of what is going on at the destination; in
addition, some of the codes are vague. Use this feature with caution.