SITE INFORMATION AND CORRESPONDENCE_FILE 2

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PRO TOSOO l ''l: '2: 3 6 Marketing C o m p a n y November 21, 2000 Ms. Dot Lofstrom Site Mitigation Unit San Joaquin County Public Health Services 304 East Weber Avenue, Third Floor Stockton, California 95202 Tosco 76 Facility#5886 2701 West March Lane Stockton, California Ms. Lofstrom: In response to your letter to me dated October 31, 2000, Tosco Marketing Company ("Tosco") submits this letter to clarify Tosco's letter dated October 12, 2000 and to describe Tosco's intent to comply with the County's directives and provide the procedures by which compliance will be achieved. Tosco submitted a letter dated October 12, 2000 to the County as a result of telephone conversations among Ron Rowe, Tosco and Tosco's consultant, Environmental Resolutions, Inc. ("ERI"). Mr. Rowe told ERI that Tosco was not compliant with the approved interim remedial action plan approved by the County on February 22, 2000. As you are aware, Tosco performed interim remedial action activities, which consisted of periodic purging of groundwater from the underground storage tank (UST) well and groundwater monitoring well MW3, from June through early August 2000. In light of Mr. Rowe's comments to ERI, Tosco wrote to Mr. Rowe to request clarification of the County's requirements to assure compliance with the County's directives. Tosco did not request discontinuation of interim remediation activities, but in fact stated that Tosco would temporarily suspend the activities until the County provided written direction because Tosco did not want to continue activities that the County believed were inconsistent with the law or regulations. Furthermore, Tosco requested a quick response so Tosco could recommence interim remedial work at the site. Mr. Rowe's response suggests that the County may have misinterpreted Tosco's letter and we want to set the record straight by relating the facts demonstrating that Tosco's intentions have been, and remain, to continue interim remedial activities and to remain compliant with applicable laws and regulations. During the interim remedial activities conducted pursuant to the approved Corrective Action Plan, Tosco's contractors have purged approximately 46,000 gallons of groundwater from the wells and disposed of the water at the Tosco Refinery in Rodeo, California. During October 2000, Tosco temporarily suspended groundwater purging activities pending clarification form the County regarding water sampling and data collection requirements. In response to the directives contained in the County's October 31, 2000 letter, Tosco will perform the following work during interim remedial activities: 1380 Lead Hill Road Suite 120 Roseville, CA 95661 916.774.2910 fax: 916.774.3004