Clay, Have you had a chance to review this? Johnathon Grammer Quality Manager Main 972.930.9868 ext. 202 Fax 972.930.9869 Rogers-O’Brien Construction Dallas | Austin www.rogers-obrien.com From: Johnathon Grammer Sent: Friday, June 18, 2010 10:41 AM To: 'Clay Barnett' Cc: 'David Wilde'; Aaron Adam Subject: 09005 - MHFS Manhole Extension Concrete Mix Design Clay, Please see attached for the proposed concrete mix design for use on extending the existing on-site sanitary manhole, at the MHFS project, vertically to bring it to proposed grade. Please let me know if this mix design is acceptable. Thank you. Johnathon Grammer Quality Manager Main 972.930.9868 ext. 202 Fax 972.930.9869 Rogers-O’Brien Construction Dallas | Austin www.rogers-obrien.com