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Mike Infurna [EH] <br /> From: Amy Terrell [aterrell@waterboards.ca.gov] <br /> Sent: Wednesday, August 29, 2007 5:42 PM <br /> To: saquilino@unifirst.com <br /> Cc: WPipes@geomatrix.com; gbibler@goodwinprocter.com; tcosgrave@harvardprojects.com; <br /> Mike Infurna [EH] <br /> Subject: unifirst schedule <br /> Mr.Aquilino, <br /> I have received the 13 August 2007 letter "Revisions to the Additional Groundwater <br /> Investigation Work Plan, Unifirst Facility,Stockton, California" prepared by Mr. William <br /> Pipes of Geomatrix Consultants. The letter proposes a revised schedule to the Additional <br /> Groundwater Investigation Work Plan dated 15 April 2007. The revised schedule is a result <br /> of an evolving site investigation. The results of groundwater sampling and cone <br /> penetrometer testing shows that delineation could most efficiently be conducted by <br /> expanding the groundwater sampling off-site and including soil vapor sampling on-site. <br /> The expanded investigation necessitates adjusting the initial timetables to accommodate <br /> the additional data collection and analysis. <br /> Regional Water Quality Control Board staff commend UniFirst for recognizing the value of a <br /> comprehensive delineation early in the investigation. This inevitably saves money in the <br /> long run. Therefore, Regional Water Board staff concur with the revised schedule. The <br /> revised schedule proposes that the monitoring wells could be installed by about 15 <br /> November 2007, and a groundwater investigation report could be completed by 31 December <br /> 2007. <br /> Thank you for the notice, and feel free to contact me if any other major variations of the <br /> work plan are necessary. <br /> Amy Terrell <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive Suite 200 <br /> Rancho Cordova, CA 95670-6114 <br /> (916) 464-4680 <br /> 1 <br />