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GEOCON <br /> CONSULTANTS.INC. <br /> GEOTECHNICAI ■ ENVIRONMENTAL ■ MATERIALS <br /> Project No.S9492.06-01 <br /> March 26,2010 <br /> Mr.James L.L. Barton <br /> California Regional Water Quality Control Board <br /> 11020 Sun Center Drive,Suite 200 <br /> Rancho Cordova,California 95670 <br /> Re: 5400 AND 5606 PACIFIC AVENUE <br /> STOCKTON,CALIFORNIA <br /> CLEANUP AND ABATEMENT ORDER NO.5-00-707 <br /> CASE NUMBERS 390258 AND 390014 <br /> CHEVRON#306620(FORMER UNOCAL#5098) <br /> REQUEST FOR DEADLINE EXTENSION FOR WORKPLAN SUBMITTAL <br /> Dear Mr.Barton: <br /> Geocon Consultants, Inc., on behalf of Stone Brothers and Associates (SBA) and Chevron <br /> Environmental Management Company (CEMC), is requesting an extension for the submission of a <br /> workplan for the former Montgomery Ward, LLC(Wards) auto service center located at 5400 Pacific <br /> Avenue and former Unocal Service Station #5098 located at 5606 Pacific Avenue, Stockton, <br /> California, which are referenced collectively as the Site. Environmental assessment, monitoring, and <br /> remediation activities at the Site have been conducted pursuant to the requirements of the September 8, <br /> 2008, Cleanup and Abatement Order (CAO) Number 5-00-707 issued to Wards, Unocal, Surry <br /> California Limited Partnership,and SBA. <br /> In it letter dated February 2, 2010, the California Regional Water Quality Control Board(CRWQCB) <br /> directed CEMC and SBA to "submit a workplan for soil vapor investigation for the all potential areas <br /> of concern, such as the Macaroni Grill (former Wards) and the bank(former Unocal), and for a direct <br /> push soil and groundwater investigation under Robinhood Drive."The original workplan due date was <br /> February 26, 2010. In a letter from AECOM, prepared on behalf of CEMC, dated February 17, 2010, <br /> AECOM requested that the due date for the workplan be extended to March 31,2010. <br /> CEMC and SBA are still in the process of negotiating an agreement on how to divide the work <br /> requested by the CRWQCB.Therefore,the Responsible Parties respectfully request a 60-day extension <br /> in the workplan due date.A workplan will be submitted on or before May 31,2010. <br /> 3160 Gold Valley Lkim,5uien 800 0 Rancho Cordova,CA 95742-7515 IS T0Iplwne 916.852.9118 0 F=916.852.9132 <br />