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s • • <br /> CAL TECH Environmental Laboratories <br /> 6814 ✓ 4 :., t a .. , <br /> Telephor � 5�i "%=' L70'd <br /> Mr.Robert Mary <br /> Page 3 <br /> October 30,2001 <br /> The instrument was last calibrated on July 14, 2001. <br /> No surrogate was added to samples. Method 8015M driven from LUFT manual does not <br /> mandate surrogate recovery; however, it is recommended. Most surrogate compounds fall <br /> within the diesel recovery range and it is used as a marker between the Gasoline Range <br /> Recovery and Diesel Range Recovery. <br /> D. I. Wet samples were extracted by method EPA 1311. The ratio of soil to D.I. water <br /> was 1:20. <br /> After 24 hours of tumbling, samples were filtered and extracted by Methylene Chloride <br /> and analyzed by EPA Method 8015M. <br /> If you have any question regarding this response or need additional information, please <br /> do not hesitate to call us at (562) 272-2700. <br /> Sincerely, <br /> O'tk lc. <br /> Roob' Yaghoubi <br /> Vice President <br /> �fy ,41 '_1 L711 .r.� A.i ..� .0C� i � �I /; ,F _I z wlI <br />