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i� C A M B R I A March 11,2004 Mr. Bob Gondek Chevron Pipe Line Company 2811 Hayes Road Houston,Texas 77082 Re: Emergency Response Environmental Report REC&VED Country Flags Release, Spatafore Property 23577 Mountain House Parkway MAY 2 1 2004 Tracy,California ENVIRON Cambria Project#483-1858 PERMENT CEST H SER© Dear Mr. Gondek: This report documents emergency response activities performed by and on behalf of Chevron Pipe Line Company (CPL)at the Country Flags Release. The release occurred on property owned by Charles Spatafore at 23577 Mountain House Parkway,Tracy, California(the Site). The release occurred because an employee of Kagehiro Ranch, Inc., (a contractor to Mr. Spatafore)punctured CPL'S KLM crude oil pipeline while plowing the overlying fields. Cambria Environmental Technology, Inc., (Cambria) was retained by CPL to: 1) direct initial environmental cleanup activities; 2) collect soil samples for laboratory analysis; and 3) document environmental activities performed by CPL emergency response personnel by preparing this report. A description of the release, the site setting, emergency response environmental activities, and Cambria's conclusions and recommendations are presented below. RELEASE OCCURRENCE AND DETECTION On the morning of December 4, 2003, an employee of Kagehiro Ranch, Inc., was tilling the Site on behalf of Mr. Spatafore. The farm worker was tilling the fields using the tractor and five-prong ripper shown in Photograph 1 (Photographs are presented as Attachment A). Prior to tilling, the worker had marked the trace of the pipeline by driving the tractor between the two pipeline boundary markers. The site vicinity and pipeline location are shown on Figure 1. Figure 2 and Photograph 2 show the northern marker and pipeline trace at the Site. The lack of furrows over the pipeline trace within the southern portion of Mr. Spatafore's field indicates that the worker was lifting the ripper as he crossed over the pipeline. However, it appears that the worker stopped lifting the ripper as work progressed to the north as evidenced by Photograph 3. Based on fresh scrape marks observed on the pipeline, the farm worker struck the Cambria pipeline nine times without penetrating the pipeline, but during the northernmost traverse one of Environmental Technology,Inc. the ripper prongs punctured the line (Photographs 3 and 4). The puncture created a spray of crude oil, and oil began accumulating on the ground above the pipeline. Photograph 3 shows that the 5900 Hollis Street worker, upon puncturing the pipeline,lifted the ripper then drove the tractor back to the barn area. Suite A Emeryville,CA 94608 Tel(510)420-0700 Fax(510)420-9170