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J - I <br /> ANATEC <br /> �". LABORATORIES <br /> Y �J I NC. <br /> 435 Tesc:oni Circle Santa Rosa, California 95401 707-526-7200 <br /> Mr. Fred Davis August 13 ; 1987 <br /> Polymatrix ANATEC Log No: 9891 (-1,2) <br /> 191 Harder Road, Ste 25 Series No: 359/020 <br /> Hayward, CA 94544 Client Ref: P.O. 9142 <br /> Subject: URGENT Priority Analysis of Two Soil Samples Identified !as <br /> "Project 065, Universal Engineers (EBMUD) , 303 W Main St <br /> Stockton" Received July 30, 1987. <br /> Dear Mr . Davis: <br /> Analysis of the samples referenced above has been completed. This <br /> report is written to confirm results transmitted verbally on <br /> August 6 and 13 , 1987 . <br /> The samples were delivered to the laboratory under documented <br /> chain-of-custody. On receipt, sample custody was transferred to <br /> ANATEC sample control personnel who subsequently documented <br /> receipt and condition of the samples and placed them in secured <br /> storage at 4 OC until analysis commenced. <br /> I <br /> In preparation for benzene, toluene, xylenes and volatile <br /> hydrocarbons measurements, aliquots of samples were taken from <br /> core centers with stainless steel implements, immediately weighed,' <br /> and sealed in septum-capped vials. Additionally, vials were <br /> prepared in essentially the same fashion to represent method <br /> blanks, commercial gasoline standards, analyte-fortified sample <br /> spikes and sample replicates. Each vial was heated for a period <br /> of one hour at 90 OC during which time light hydrocarbons (such as <br /> gasoline) were expected to equilibrate in distribution between <br /> sample and headspace. Headspace gases were subsequently analyzed <br /> by gas chromatography to measure total light hydrocarbons. <br /> Response of the chromatographic system to samples was compared . <br /> with response to standards prepared with commercial gasolines, and <br /> from reagent grade benzene, toluene and xylene for purposes of <br /> qualitative and quantitative interpretation. <br /> 13iolog,ical Studies Laboratory /analysis Research <br />