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M-MR, M- 11am- <br /> N'VE: STERN Gl?o1. c1GIC R.! Sc1URCE: S , INC . <br /> i <br /> 1.Marinaro/13 Apr 1959 7 <br /> i boring B-5 at the west side of the site. The highest concentration of <br /> l BTXE was detected in soil collertei from boring B-1 at .the southern margin <br /> of the site. Groundwater collected From well M-1 contained the highest <br /> _ concentration of TPPH at 30,000 ppb and the highest concentrations of <br /> BTXE. Benzine was detected at 3,600 ppb in the groundwater sample <br /> collected from MW-1. Well MW-2 on the east side of the site aA well MW- <br /> 5 also contained TPPH and BTXE. In addition, 1,2 dichlorobenzene and <br /> Freon 113 were.r:--ilected in well MW-5. Only trace amounts of zinc were <br /> .< detected in all wells; except well MW-4, which was below the limit of <br /> detection. <br /> Oil and grease at 60 ppm and 150 ppm were detected in the soil <br /> sample collected at 11 ft and 30.2 ft, respectively, from boring B-3. Oil <br /> and Grease was not detected in any of the groundwater samples. <br /> The estimated direction of groundwater flow is to the eastat a <br /> gradient of about 0-1% Three municipal wells are located within .a 1/2 <br /> mile radius of the-site. <br /> We appreciate the opportunity to provide geologic and envirorasental <br /> consulting services to Chevron and trust this report meets your needs. <br /> y If you have any questions, please call us at (415) 457-7595. <br /> Sincerely, <br /> Western Geologic Resource, Inc. <br /> !Cathleen A. Isaacson <br /> Project Hydrogeologist <br /> .Q��QRpf ESSI!iy! `, <br /> a. r Sherwood Lovejoy, A. <br /> 36387 S lar Hy6-ogeoIogist <br /> c�Z <br /> l�IFOF CA1.lE� Don M. Eisenberg _ <br /> Senior Engineer <br /> ad/KAI/5L/DME <br /> _ luirlma9 , <br /> [-.•IIA: - t <br />