This document was prepared by the Railroad Commission of Texas under a grant from the Texas State Energy Conservation Office. The Commission and any person acting on behalf of the Commission:

     a) does not make any warranty or representation, express or implied, with respect to the use or misuse of any information, apparatus, method or process disclosed;
     b) specifically disclaims any and all warranties, representations, or endorsements, express or implied, with regard to this information, including, but not limited to, all implied warranties of merchantability, fitness for a particular purpose, or noninfringement; and
     c) disclaims all liabilities with respect to the misuse of, or for damages or loss resulting from, the use or misuse of any information, apparatus, method or process disclosed.

The disclosure or furnishing of any specific brand names, products, or vendors is not and should not be construed as an endorsement by the Commission or by any person acting on behalf of the Commission.

(c) 2007 Railroad Commission of Texas. These materials may be copied only by a governmental entity or person acting on its behalf or by classroom teachers or students for educational purposes. Any reproduction for other than for governmental or educational purposes is strictly prohibited. For additional information on the Commission's web site policies, go to http://www.rrc.state.tx.us/sitepolicies/index.php.