SITE INFORMATION AND CORRESPONDENCE_FILE 2

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1 Mike Infurna [EH] From: Mike Infurna [EH] Sent: Thursday, April 23, 2009 11:23 AM G� To: 'Sparrowe, Tom' 4-it,-bq Subject: RE: 240797-Shell-branded Service Station, 2494 E. Fremont St, Stockton-Extension Request Mr. Sparrowe, P.G. Your request for an extension and modification to the revised CAP, now an investigation work plan due on Geotracker for review by the EHD on May 22, 2009 is adequate and approved. [H&S Code 25296.1O(c)(3)] From: Sparrowe,Tom [mailto:tsparrowe@craworld.com] Sent: Thursday, April 23, 2009 9:12 AM To: Mike Infurna [EH] Cc: denis.l.brown@shell.com; Cristin.Bruce@shell.com; Lescure, Daniel; Cool, Aubrey Subject: 240797-Shell-branded Service Station, 2494 E. Fremont St, Stockton-Extension Request Mr. Infurna, On March 9, 2009, San Joaquin County Environmental Health Department (SJCDEH) issued a letter to Shell Oil Products (Shell) requesting a Revised Corrective Action Plan (Revised CAP) be submitted by April 23, 2009 that addresses the concerns listed in their March 9, 2009 and July 23, 2008 letters. After thorough review of historical soil and groundwater data it was determined that there are data gaps (i.e. lack of shallow soil samples, old soil data, incomplete groundwater data, etc.)that need to be addressed before a Revised CAP can be completed. With this development, CRA proposes that we perform a subsurface investigation that will address issues and concerns raised in SJCEHD's letters to determine whether there is an off-site or on-site 1,2-DCA source, investigate the soil and groundwater conditions between the Shell site and the Former ARCO station located at 2491 E. Fremont St. (2478 E. Oak St.), and update the hydrocarbon concentrations in soil for mass calculations. With this new approach, we request a change in scope of work from a Revised CAP to a conducting a subsurface investigation and a four week extension from the April 24, 2009 due date. This will allow us enough time to prepare, review, and submit a work plan by May 22, 2009. It was a pleasure talking to you this morning about this subject and we look forward to working with you. A response to this request is appreciated. Best regards, Tom Sparrowe, PG Conesta�ga-Rovers & Associates,Inc. (CRA) 5900 Hollis St., Suite A Emeryville,CA 94608 Direct: 510-420-3316 Cell: 510-385-0646 Fax: 510-420-9170 Visit us at www.craworld.com rbis o-mail mar contain confidential ad privileged ntterial for the sole use of the intended recipient.A ny review or distribution brothers;is s cicdr prohibited if you are not the intended recipient please contact the sender and delete all copies 4/23/2009