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b <br /> ERM EnviroClean-West <br /> '1777 Botelho Drive <br /> i 'j 'af Suite 200 <br /> ' ,T f Walnut Creek, CA 94596 <br /> `R V � (510)256-6468 <br /> k3 - 1 'Q (510)946-996.2(Pax) -DEC <br /> 8 December 1993 _ <br /> r411 <br /> , <br /> Ms..Mary Meays i <br /> { Environmental Health Division <br /> San Joaquin County <br /> 445 N. San Joaquin Street <br /> Stockton, California 95201 <br /> ,SUBJECT: Confirmatory Soil Sampling I L <br /> Aerated Soil Pile <br /> 1325 Weber Avenue Site <br /> - f <br /> Dear Mary: <br /> # Following our telephone conversation of .today, ERM EnviroClean-West Inc. <br /> f (EnviroClean-West).is;writing this-letter-to..confirm th.Cidetaiis-,of the 4 x <br /> proposed confirmation sampling at:the=subject site.r, sampling t <br /> requirements will be as-follows:: <br /> I • Per San Joaquin County's requirement,,EnviroClean-West will, <br /> collect soil samples from the aerated-pile.from 20 discrete locations.- <br /> The <br /> ocations.The discrete samples will be composited into 10 samples for laboratory <br /> analysis. All samples will be analyzed using EPA'Method 8015/8020 <br /> (gasoline)•. <br /> -�—= Relatively undisturbed sampi-es•.wiii=be-°collected'iriside brass tubes <br /> from the aerated soil pile approximately 3'feet.below pile surface using <br /> a hand-auger with a bucket and a slide hammer with a sample sleeve. <br /> All sampling gear will be changed or decontaminated between each <br /> sample location. All samples_ will-be--storedJn a cooler, chilled with ice, <br /> immediately-after,collection. Chain-of=custody forms will be used for <br /> sample logging and tracking. <br /> !, The sampling will begin at 10:00 AM on.9.December 1993 (thursday), <br /> = and-will be-conducted:. in.•the presence of a.San Joaquin County official. <br /> 4 We estimate.that.-the sampling-process--will be;completed in about 4 <br /> hours. . <br /> A Member of-the Environmental <br /> Resources Management Group <br />