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ICOLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: ENSR Consultmg&Engmeering Service Request- S9701416 <br /> Project. Norcal/Stockton Scavenger/5027-002 Date Collected: 7116197 <br /> Sample Matra Solid Date Received 7/22/97 <br /> BTEX and TPH as Gasoline <br /> Sample Name SAGAC4 Units mg/Kg(ppm) <br /> Lab Code 59701416-007 Basis Wet <br /> Test Notes C 1 <br /> Prep Analysts Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Nates <br /> TPH as Gasolme EPA 5030 CA/LUFP 1 25 7/29/97 7/30/97 26 <br /> Benzew EPA 5030 8020 0 005 25 7/29/97 7/30/97 39 <br /> Toluene EPA 5030 8020 0 005 25 7/29/97 7/30197 0 037 <br /> Ethylhenzese EPA 5030 8020 0 005 25 7/29/97 7130197 0 034 <br /> Xylenes,Total EPA 5030 8020 0 005 25 7/29/97 7/30/97 0 021 <br /> C 1 The MRI,was elevated due to high analyte concentration requiring sample dilution <br /> 1 <br /> IS22=05wp <br />' Page 8 <br />