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a <br />San Joaquin County <br />Environmental Health Department <br />600 East Main Street <br />Stockton, California 95202-3029 <br />Website: www.sjgov.org/ehd <br />Phone: (209) 468-3420 <br />Fax: (209) 464-0138 <br />January 26, 2012 <br />OJ <br />DIRECTOR <br />Donna Heran, REHS <br />PROGRAM COORDINATORS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Kasey Foley, REHS <br />Linda Turkatte, REHS <br />Mr. Donald Helsel Anheuser-Busch Companies <br />Earthgrains Baking Companies, Inc. One Busch Place <br />2651 South Airport Way St. Louis, Missouri 63118 <br />Stockton, California 95206 <br />Mr. Christopher Wolfe Ms. Kacey Fung <br />Earthgrains Baking Companies, Inc. Earthgrains Baking Companies, Inc. <br />249 North 11 in Street 3500 Lacey Road <br />Sunbury, Pennsylvania 17801 Downers Grove, Illinois 60515-5424 <br />Subject: Earthgrains Baking Companies, Inc. (Former Rainbo Baking Company) <br />2651 South Airport Way <br />Stockton, California 95206 LOP Case No.: 19093 <br />The San Joaquin County Environmental Health Department (EHD) has received a No Further <br />Action Required Concurrence letter from the Central Valley Regional Water Quality Control <br />Board (CVRWQCB) dated 21 December 2011 for the above referenced site. It is now <br />necessary to plan and execute the destruction of all wells installed as part of your site <br />investigation and remedial action, as the EHD will not issue a Case Closure Letter for this site <br />until the wells have been properly destroyed and all onsite waste material has been removed <br />and properly disposed. The wells are to be destroyed within 90 days of the date of this letter, or <br />current analytical data for groundwater collected quarterly from the wells shall be submitted for <br />review until the wells have been properly destroyed. <br />Please submit a scope of work proposal that details the conditions and construction of the wells <br />and the methods and materials to be used to destroy them. To be issued a well destruction <br />permit, the proposal must address the concerns of the EHD and the San Joaquin County Well <br />Standards requirements, such as: <br />• Wells that have laboratory data from the last sampling event that demonstrate the <br />presence of any contaminants of concern are to be destroyed by removing all the <br />contents of the well (conductor casing, well casing, screen, filter pack, grout sealant), <br />the cleared borehole is then to be sealed with neat cement by pressure grouting from <br />the bottom upward to a depth of three to five feet below grade. <br />• All wells with unknown construction and/or located in an area of known or suspected <br />area of contamination are to be destroyed by removing all the contents of the well <br />(conductor casing, well casing, screen, filter pack, grout sealant). the cleared borehole <br />