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1-5:19 $510 :146.,A813 THE MARK (,ROUP -+ X1002%003 <br /> THE <br /> MARK <br /> GROUP <br /> ENGINEERS E. GEOLOGISTS, INC. <br /> 92-11,7102 <br /> February '2,4, 1990' <br /> Sax: Joaquin PHS <br /> Emironmental Health- Services <br /> 445N. San Joaquin <br /> Stockton, CA 95201 <br /> Attention: Ms. Mane Hinson, Unit 1V Supervisor <br /> Subject: SAMPLING PLAN FOR SOUTH PIT - <br /> Stocktozz Scavenger Association <br /> Stockton, Califoraia <br /> Deas- Ms. Hinson: <br /> The MARK Group, Inc. (MARK) would like to propose a sampling and analysis plan <br /> for the south pit located at the Stockton Scavenger Association. MARK saggests collecting a <br /> total of six samples from the pit. As shown on drawing 1-1, one sample will be collected from <br /> each of the four walls and tivo samples will be collected from the bottom. 'lie. soil samples will <br /> be analyzed fox- Modified 8015/5020 (rPH-G, TPH-D and B EX.), and organic lead. These, <br /> samples will be. submitted for pit closure. <br /> Concurrently, we are preparing a more formal addendum to the workplan which will <br /> includt the sampliag described herein, the pit sampling conducted two weeks ago, and the <br /> proposed in-situ soil vapor extraction system which has been discussed. The addendum also will <br /> ,nelude a revised schedule illustrating the added actiAties- <br /> If you have any questions regarding this letter: or any other aiatttl's, please do not <br /> hesitate to call_ <br /> Sincerely, <br /> • <br /> Thomas E. Lindemuth, P.E. <br /> Hookston Square, Suite 120 3480 Buskirk Avenue Pleasant Hill, CA 94523 (510) 946-1055 FAX (510) 946-9513 <br />