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COLUMBIA ANALYTICAL SERVICES, INC. <br /> Analytical Report <br /> Client: EMCON Associates Date Received: 07/28/93 <br /> Project: Teichert Construction/OF90-002.03 Service Request No.: SJ93-0932 <br /> Sample Matrix: Water <br /> BTEX and TPH as Gasoline <br /> EPA Methods 5030/8020/California DHS LUFT Method <br /> Pg/L (ppb) <br /> Sample Name: MW-10 MW-11 MW-12 <br /> Date Analyzed: 08/05/93 08/05/93 08/05/93 " <br /> Analyte MRL <br /> Benzene 0.5 <20. `* <9. '* ND <br /> Toluene 0.5 <0-6 ** ND ND <br /> Ethylbenzene 0.5 ND ND ND <br /> Total XVlenes 0.5 < 1. *" ND ND <br /> TPH as Gasoline 50 290. 170. ND <br /> Sample Name. MW-13 Method Blank <br /> Date Analyzed: 08/05/93 08/05/93 <br /> Analyte MRL <br /> Benzene 0.5 170. ND <br /> Toluene 0.5 21 . ND <br /> Ethylbenzene 0.5 22. ND <br /> Total Xylenes 0.5 20. ND <br /> TPH as Gasoline 50 4,500. ND <br /> This sample was part of the analytical batch started on August 5, 1993. However, it was <br /> analyzed after midnight so the actual date analyzed is August 6, 1993. <br /> *# Raised MRL due to matrix interference. <br /> Approved by: J ` G� t ]�—�k�,` Date: <br /> 3 <br /> 1921 Ringwood Avenue 5on Jose. California 95131 o Telephone 4081437-2400 a Fox 4081437-9356 <br />