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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 05ri2!93 <br /> Project: Teichert Construction/OF90-002.03 Service Request No.: SJ93-0855 <br /> Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 503W8020/California DHS LOFT Method <br /> pg/L Ippbl <br /> Sample Name: MW-13 Method Blank <br /> Date Analyzed: 05120193 " 05/20/93 <br /> Analyte MRL <br /> Benzene 0.5 920. ND <br /> Toluene 0.5 42. ND <br /> Ethylbenzene 0.5 17. ND <br /> Total Xylenes 0.5 33, ND <br /> TPH as Gasoline 50 7,200. ND <br /> TPH Total Petroleum Hydrocarbons <br /> MRL Method Reporting Limit <br /> ND None Detected at or above the method reporting limit <br /> This sample was part of the analytical batch started on May 20, 1993. However, it was <br /> analyzed after midnight so the actual date analyzed is May 21, 1993. <br /> • <br /> Approved by: <br /> 712 ZL' Dater/ <br /> 3 <br /> 1921 Ringwood Avenues son Jose, California 95131 Telephone 4081437.2400 0 Fax 4081437.9356 <br />