SITE INFORMATION AND CORRESPONDENCE_FILE 2

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CHRONOLOGY Chapin Brothers Inc. 1766 Monte Diablo, Stockton (APN 135-050-50) 08/06/85 Chapin Brothers Inc. took ownership of the property on this date. 10/04/85 The date on the State Water Resources Control Board Hazardous Substance Storage Container data sheets which show Chapin Bros Inc. as the owners of the underground storage tanks (USTs) at the site. 12/18/86 On this date the Environmental Health Department (EHD) made an inspection at the site and completed a report with monitoring alternatives for the USTs and mailed it to Chapin Brothers. 10/08/87 The date the EHD received precision test results indicating the USTs containing fuel had passed. 01/10/89 The date the EHD received precision test results indication the waste oil UST had passed. 10/31/90 The date of the work plan to perform an environmental assessment because of a proposed property sale. 11/30/90 Monitoring well MW1 was installed on the site on this date. 01/09/91 The date of the Environmental Investigation Summary report that documents the installation of MW1. 02/15/91 The date of the letter from Steven Goldberg, attorney for Chapin Brothers with a narrative prepared by Russell Chapin about operation of USTs at the site under a sub lease from Shell Oil, who owned the USTs and stated one of the UST's leaked so Shell replaced it. 03/15/91 The date EHD filed an unauthorized release report and a notification of hazardous waste discharge report. 04/24/91 The date of Chapin's attorney's letter to Shell Oil that they are responsible for the contamination at the site. 08/06/91 The date EHD placed the site in the Local Oversight Program and named Chapin Brothers Inc. and Shell Oil as responsible parties. 09/09/91 The date of the EHD inspection report stating the USTs are improperly abandoned and requiring a closure plan be submitted to the EHD or immediate monitoring of the USTs.