This document was prepared as an account of work sponsored by the United States
Government. While this document is believed to contain correct information, neither
the United States Government nor any agency thereof, nor any of their employees,
makes any warranty, express or implied, or assumes any legal responsibility for the
accuracy, completeness, or usefulness of any information, apparatus, product, or pro-
cess disclosed, or represents that its use would not infringe privately owned rights. EPA
hereby disclaims any liability for damages arising from the use of the document, includ-
ing, without limitation, direct, indirect or consequential damages including personal
injury, property loss, loss of revenue, loss of profit, loss of opportunity, or other loss.
Reference herein to any specific commercial product, process, or service by its trade
name, trademark, manufacturer, or otherwise does not necessarily constitute nor imply
its endorsement, recommendation, or favoring by the United States Government nor
any agency thereof. The views and opinions of authors expressed herein do not neces-
sarily state or reflect those of the United States Government nor any agency thereof.