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4 <br /> h <br /> LABORATORY REPORT PACIFIC ENVIRONMENTAL LABORATORY <br /> 674 Harrison Street <br /> San Francisco, CA 94107 <br /> 415-243-2580 <br /> For Helmick & Lerner, Inc. <br /> Attention John Russell Received 08/20/91 <br /> Address 3750 Auburn Blvd. , Suite A Reported 08/28/91 <br /> Sacramento, CA 95821 <br /> Quality Control Page <br /> Source: Stockton Unified School Distract, Proj . No. 0089003 <br /> Lab. No. : 917648 <br /> Sample I. D. : 138 <br /> Matrix: Soil <br /> Depth: --- <br /> Date Collected: 08/19/91 <br /> Time Collected: 1215 <br /> Collected by: HLI <br /> Date Extracted: -- <br /> Date Analyzed: 08/26/91 <br /> EPA Method: 8020 <br /> Analysis Units Replicate Analytical Results Det. Ling. <br /> Benzene ug/Kg 8 6 Spk. Rec. 104% 1 <br /> Toluene ug/Kg 10 7 Spk. Rec. 1010 1 <br /> Ethylbenzene ug/Kg <1 <1 1 <br /> Total Xylene ug/Kg 17 15 1 <br />• <br /> Comments: Results reported in micrograms per kilogram. <br /> Analyst Polly Cheung _ Manager <br /> iv <br /> This report applies only to the sample investigated and is not necessarily indicative of the quality of apparently identical or <br /> similar samples The liability of the laboratory is limited to the amount paid for the report by the issuee The issuee assumes <br /> ail liability for the further distribution of this report or its contents and by making such distribution agrees to hold the <br /> laboratory harmless against all claims of persons so informed of the contents hereof <br /> 0- <br />