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File No. NFE4533-01 Doc. No. 9908-086 <br /> August 24, 1999 <br /> Conclusions <br /> Hydrocarbon concentrations were found in two of the four borings within the right-of-way on the <br /> site. The laboratory report indicated TEPHg5 crude oil concentrations of 3,400 ppm in boring <br /> EB7 and 4,300 ppm TEPH as crude oil in boring EB9. <br /> The areas that contain residual hydrocarbons in soil are located within the proposed retention ponds <br /> #2 and#3. <br /> We appreciate this opportunity to be of service to Pombo Real Estate. Should you have any <br /> questions regarding this report,feel free to contact us. <br /> Very truly yours, <br /> EARTH SYSTEMS CONSULTANTS <br /> Northern California <br /> �kth"L[� TilL�tlicH!/ G <br /> Staff Geologist Senior Geologist <br /> Certified Engineering Geologist 1501 <br /> LTB/GMP:dh Ltr#302 <br /> Distribution: 2 to Addressee <br /> 1 to W. Tod Ridgeway <br /> 1 to Mr.Don MacKenzie <br /> 1 to Ms. Katie Hower,Chevron Environmental Management Company <br /> 1 to Ms.Elizabeth Lu,Geomatrix Consultants <br /> 1 to Mr.Mike Infuma,San Joaquin County Public Health Services <br /> Attachments: Boring Logs <br /> Laboratory Reports and Chromatographs <br /> Earth Systems Consultants Northern California 3 <br />